JP5919181B2 - Hot water heating system - Google Patents

Description

  The technology disclosed in the present specification relates to a hot water supply / heating system.

  Patent Document 1 discloses a hot water supply and heating system including a hot water supply path for supplying hot water to a hot water supply terminal, a heating path for circulating a heat medium between the heating terminals, and a heating device through which the heating path and the hot water supply path pass. Yes. The heating device includes a combustion chamber, a hot water supply burner that burns gas in the combustion chamber to heat water in the hot water supply passage, and a heating burner that burns gas in the combustion chamber and heats the heat medium in the heating passage. And a fan that takes in the combustion air into the combustion chamber and sends the combustion exhaust gas out of the combustion chamber. In the hot water supply and heating system of Patent Literature 1, a hot water supply burner, a heating burner, and a fan are provided in one place to constitute a heating device. Therefore, when installing the hot water supply and heating system, it is only necessary to concentrate the gas supply pipes in one place, and there is an advantage that the arrangement of various facilities can be simplified.

JP 2012-93064 A

  In the hot water supply and heating system of Patent Document 1, for example, a heating device takes in air for combustion of a hot water supply burner into a combustion chamber and sends combustion exhaust gas to the outside of the combustion chamber, and for heating the heating burner into the combustion chamber. In some cases, a heating fan that takes in the air and sends out combustion exhaust gas to the outside of the combustion chamber may be provided. Further, in such a hot water supply and heating system, when a hot water supply request is made while performing a heating operation at the heating terminal only by the heat of the heat medium circulating through the heating path without burning the heating burner, the hot water supply path In some cases, a hot water supply burner and a hot water supply fan operate to heat water discharged from the hot water. At this time, if the combustion exhaust gas from the hot water supply burner flows into the heating burner, incomplete combustion may occur when the heating burner is burned next time. Furthermore, if the combustion exhaust gas leaks from the attachment port of the heating fan or the like, there is a possibility that the combustion exhaust gas leaks into the living room. Also, if the flue gas leaking from the heating fan attachment port flows in the vicinity of the hot water supply fan, the flue gas is supplied to the hot water burner by the hot water supply fan, and incomplete combustion of the hot water burner during combustion occurs. It can happen. Therefore, in the hot water supply and heating system described above, the hot water supply burner and the hot water supply fan may be operated and the heating fan may be operated in order to prevent combustion exhaust gas from the hot water supply burner from flowing into the heating burner. In this case, the heat medium passing through the heating path in the combustion chamber of the heating device may be cooled by the outside air that flows under the influence of the wind generated by the heating fan. When the temperature of the heat medium passing through the heating path in the combustion chamber of the heating device decreases, the heating efficiency decreases.

  The present specification eliminates the above-mentioned inconvenience, and the heating efficiency is lowered when the heating device is configured by combining the hot water supply burner, the heating burner, and the fan in one place. A hot water supply / heating system that can be suppressed is provided.

  A hot water supply and heating system disclosed in the present specification includes a hot water supply path for supplying hot water to a hot water supply terminal, a heating path for circulating a heat medium between the heating terminals, and a heating device through which the heating path and the hot water supply path pass. The heating device includes a combustion chamber, a hot water supply burner that burns gas in the combustion chamber and heats water in the hot water supply passage, and a heating burner that burns gas in the combustion chamber and heats the heat medium in the heating passage. And a fan that introduces combustion air into the combustion chamber and sends out combustion exhaust gas to the outside of the combustion chamber. In this hot water supply and heating system, in a specific case where a hot water supply operation is performed in which the hot water supply burner is burned while the heating terminal is performing the heating operation without burning the heating burner, the heat medium in the heating path is heated by the heating device. To pass through.

  According to the hot water supply and heating system described above, in a specific case where a hot water supply operation is performed in which the hot water supply burner is burned while the heating terminal is performing the heating operation without burning the heating burner, the heat medium in the heating path is Passing through the heating device is suppressed. Therefore, it can suppress that the heat medium which passes the inside of a heating path | route is cooled by the external air which flows in by the influence of the wind accompanying the action | operation of a fan. As a result, even if the hot water supply operation is performed in which the hot water supply burner is burned while the heating terminal is performing the heating operation without operating the heating burner, the heating efficiency is unlikely to decrease. Therefore, for example, even when a heating device is configured by collectively providing a hot water supply burner, a heating burner, and a fan in one place, it is possible to suppress a decrease in heating efficiency.

The figure which shows typically the structure of the hot-water supply heating system 2 of 1st Example. The flowchart which shows the process performed when heating operation is performed without operating the heating unit 140 for heating in 1st Example. The figure which shows typically the structure of the hot water supply heating system 2 of 2nd Example. In 2nd Example, the flowchart which shows the process performed when performing heating operation, without operating the heating unit 140 for heating.

  The main features of the embodiments described below are listed. The technical elements described below are independent technical elements and exhibit technical usefulness alone or in various combinations, and are not limited to the combinations described in the claims at the time of filing. Absent.

(Characteristic 1) A hot water supply operation that further includes a pump that is a drive source that circulates the heat medium in the heating path and that burns the hot water supply burner while performing the heating operation at the heating terminal without burning the heating burner. It is preferred to stop the pump in the specific case that is done. According to this structure, it can suppress appropriately that the heat medium in a heating path | route passes a heating apparatus by stopping a pump.

(Characteristic 2) A bypass path provided in the heating path for connecting the upstream side and the downstream side of the heating device, and an on-off valve for opening and closing the bypass path, further comprising: It is preferable to open it. According to this structure, it can suppress appropriately that the heat medium in a heating path | route passes a heating apparatus by opening an on-off valve and opening a bypass path.

(First embodiment)
As shown in FIG. 1, the hot water supply / heating system 2 according to this embodiment includes a tank 10, a hot water supply system 104, a heat pump system 106, a heating system 108, a heating device 120, and a control device 100. .

  The tank 10 stores water (hot water). The tank 10 is a hermetically sealed type, and the outside is covered with a heat insulating material. Water is stored in the tank 10 until it is full. The thermistors 12, 14, 16 and 18 are attached to the tank 10 at substantially equal intervals in the height direction of the tank 10. Each thermistor 12, 14, 16, 18 measures the temperature of water at its mounting position.

  The heat pump system 106 includes a heat pump 50 and a heat storage tank water circulation path 52. The heat storage tank water circulation path 52 has an upstream end connected to the lower portion of the tank 10 and a downstream end connected to the upper portion of the tank 10. A circulation pump 54 is interposed in the heat storage tank water circulation path 52. The circulation pump 54 sends the water in the heat storage tank water circulation path 52 from the upstream side to the downstream side.

The heat pump 50 is a heat source that absorbs heat from the outside air and heats the water in the heat storage tank water circulation path 52. Although not shown, the heat pump 50 includes a heat medium circuit that circulates a heat medium (for example, CO ₂ ), an evaporator that exchanges heat between the outside air and the heat medium, and compresses the heat medium to a high temperature and high pressure. Compressor, a heat exchanger for exchanging heat between the water in the heat storage tank water circulation path 52 and the high-temperature and high-pressure heat medium, and depressurizing the heat medium after heat exchange to low temperature and low pressure An expansion valve. When the heat pump 50 and the circulation pump 54 are operated, the water in the lower part of the tank 10 is introduced into the heat storage tank water circulation path 52, the introduced water is heated by the heat pump 50, and the heated water is returned to the upper part of the tank 10.

  The hot water supply system 104 includes a tap water introduction path 24 and a hot water supply path 36. The upstream end of the tap water introduction path 24 is connected to a tap water supply source 32. The downstream side of the tap water introduction path 24 is branched into a first introduction path 24a and a second introduction path 24b. The downstream end of the first introduction path 24 a is connected to the lower part of the tank 10. The downstream end of the second introduction path 24 b is connected in the middle of the hot water supply path 36. A mixing valve 36a that adjusts the ratio of the flow rate of water flowing through the first introduction path 24a (that is, the hot water supply path 36) and the flow rate of water flowing through the second introduction path 24b is disposed in the connection portion. A check valve 26 is interposed in the first introduction path 24a. A check valve 28 and a water amount sensor 30 are interposed in the second introduction path 24b. The water amount sensor 30 detects the flow rate of tap water flowing in the second introduction path 24b.

  An upstream end of the hot water supply path 36 is connected to the upper part of the tank 10. As described above, the second introduction path 24 b of the tap water introduction path 24 is connected to the hot water supply path 36. A water amount sensor 34 is interposed in the hot water supply path 36 upstream of the connection portion with the second introduction path 24b. The water amount sensor 34 detects the flow rate of water flowing in the hot water supply path 36. The hot water supply path 36 on the downstream side of the connection portion with the second introduction path 24 b passes through the case 121 and the combustion chamber 122 of the heating device 120. Although described later in detail, the heating device 120 heats the water in the hot water supply path 36 that passes through the combustion chamber 122. The downstream end of the hot water supply path 36 is connected to a hot water tap 38. The hot water supply path 36 is provided with a bypass path 36 b that is a flow path that bypasses the heating device 120. The bypass passage 36b is provided with a bypass control valve 36c for adjusting the opening degree of the bypass passage 36b.

  The heating system 108 includes a heating tank water circulation path 20, a heat exchanger 60, a systern 70, a heating path 71, and a heating terminal 76. The heating path 71 includes a heating forward path 72, a heating return path 84, a regulating valve 90, a heat recovery path 88, a bypass path 94, and a circulation path 96. The heating tank water circulation path 20 and the heat recovery path 88 pass through the heat exchanger 60. The heating path 71 is a water channel for circulating the water in the cistern 70. The water in the heating path 71 is heated by the heat exchanger 60 and the heating device 120.

  The heating tank water circulation path 20 has an upstream end connected to the upper part of the tank 10 and a downstream end connected to the lower part of the tank 10. A circulation pump 22 is interposed in the heating tank water circulation path 20. The circulation pump 22 sends out water (warm water) in the heating tank water circulation path 20 from the upstream side to the downstream side. The heating tank water circulation path 20 passes through the heat exchanger 60 as described above. Therefore, in the heat exchanger 60, the water in the heat recovery path 88 is heated by the heat of the water (warm water) passing through the heating tank water circulation path 20. The water after passing through the heat exchanger 60 is returned to the lower part of the tank 10.

  The cistern 70 is a container having an open top and stores water as a heat medium therein. The downstream end of the circulation flow path 96 and the upstream end of the heating forward path 72 are connected to the cistern 70. Water flows from the circulation channel 96 into the cistern 70. Water in the cistern 70 is introduced into the heating forward path 72.

  The heating forward path 72 has an upstream end connected to the cistern 70 and a downstream end connected to the outlet of the heating terminal 76. A circulation pump 74 is interposed in the heating forward path 72. The circulation pump 74 is a pump that sends water in the heating forward path 72 downstream. The heating forward path 72 on the downstream side of the circulation pump 74 passes through the case 121 and the combustion chamber 122 of the heating device 120. Although described in detail later, the heating device 120 heats the water in the heating forward path 72 that passes through the combustion chamber 122. The water heated by the heating device 120 is supplied to the heating terminal 76. Further, a thermistor 78 is interposed on the downstream side of the heating device 120 in the heating forward path 72. The thermistor 78 measures the temperature of the water in the heating forward path 72 after passing through the heating device 120.

  The heating terminal 76 is a terminal that heats the living room using the heat of water supplied from the heating forward path 72. When the water supplied from the heating forward path 72 is used for heating, it is deprived of heat and becomes relatively low temperature water. The relatively low-temperature water after being used for heating is introduced into the heating return path 84.

  The heating return path 84 has an upstream end connected to the return port of the heating terminal 76, and a downstream end connected to the upstream end of the bypass path 94 and the upstream end of the heat recovery path 88. A thermistor 86 is interposed in the heating return path 84. The thermistor 86 measures the temperature of water in the heating return path 84 (that is, the temperature of water sent to the heat exchanger 60).

  The heat recovery path 88 has an upstream end connected to the upstream end of the bypass path 94 and the downstream end of the heating return path 84, and a downstream end connected to the downstream end of the bypass path 94 and the upstream end of the circulation flow path 96. The heat recovery path 88 passes through the heat exchanger 60. Therefore, when the circulation pump 74 and the circulation pump 22 are operated, the water in the heat recovery path 88 is heated by the heat exchanger 60 as described above. A thermistor 92 is interposed downstream of the heat exchanger 60 in the heat recovery path 88. The thermistor 92 measures the temperature of water in the heat recovery path 88 after passing through the heat exchanger 60.

  The bypass path 94 has an upstream end connected to the downstream end of the heating return path 84 and the upstream end of the heat recovery path 88, and a downstream end connected to the downstream end of the heat recovery path 88 and the upstream end of the circulation path 96. That is, the bypass 94 bypasses the upstream side and the downstream side of the heat exchanger 60. The regulating valve 90 is attached to a connection portion between the downstream end of the heating return path 84, the upstream end of the heat recovery path 88, and the upstream end of the bypass path 94. The adjustment valve 90 changes the opening degree, thereby the ratio between the flow rate of water passing through the heat recovery path 88 (flow rate of water passing through the heat exchanger 60) and the flow rate of water passing through the bypass path 94. Can be changed.

  The circulation channel 96 has an upstream end connected to the downstream end of the heat recovery path 88 and the downstream end of the bypass path 94, and a downstream end connected to the cistern 70. A thermistor 98 is interposed in the circulation channel 96. The thermistor 98 measures the temperature of water in the circulation channel 96.

  The heating device 120 includes a case 121, a combustion chamber 122, a hot water supply heating unit 130, and a heating heating unit 140. A combustion chamber 122 is stored in the case 121, and the combustion chamber 122 is provided with a hot water supply heating unit 130 and a heating heating unit 140. Further, as described above, the portion of the hot water supply path 36 on the downstream side from the connection part with the second introduction path 24 b passes through the case 121 and the combustion chamber 122. Further, the portion of the heating forward path 72 on the downstream side of the circulation pump 74 also passes through the case 121 and the combustion chamber 122.

  The hot water supply heating unit 130 includes a hot water supply burner 132 and a hot water supply fan 134. The hot water supply burner 132 is provided in the combustion chamber 122, and heats water in the hot water supply path 36 by burning gas in the combustion chamber 122. Hot water supply fan 134 is attached to the outer wall of combustion chamber 122, takes in combustion air from hot water supply burner 132 into combustion chamber 122, and sends combustion exhaust gas out of combustion chamber 122.

  The heating unit 140 includes a heating burner 142 and a heating fan 144. The heating burner 142 is provided in the combustion chamber 122 and burns gas in the combustion chamber 122 to heat the water in the heating forward path 72. The heating fan 144 is attached to the outer wall of the combustion chamber 122, takes in the combustion air of the heating burner 142 into the combustion chamber 122, and sends the combustion exhaust gas out of the combustion chamber 122.

  A heat insulating material (not shown) is disposed on the inner wall of the combustion chamber 122. Thereby, the heating efficiency of the heating unit for hot water supply 130 and the heating unit 140 for heating is kept good. Further, an exhaust port 124 for sending combustion exhaust gas generated by the hot water supply burner 132 and the heating burner 142 to the outside of the combustion chamber 122 is provided in the upper part of the combustion chamber 122. The exhaust port 124 is provided through the case 121. The opening of the exhaust port 124 protrudes outside the case 121. Further, a partition wall 126 is provided in the combustion chamber 122 to partition an installation area of the hot water supply burner 132 and an installation area of the heating burner 142. Thus, the combustion chamber 122 is partitioned by the partition wall 126. For example, when the hot water supply burner 132 and the hot water supply fan 134 are operated while the heating fan 144 is stopped, the hot water supply burner 132 is operated. The combustion exhaust gas may flow into the installation area of the heating burner 142. If the combustion exhaust gas from the hot water supply burner 132 flows into the installation area of the heating burner 142, incomplete combustion may occur when the heating burner 142 is burned next time. Furthermore, if the flue gas leaks from the attachment port of the heating fan 144, the flue gas may leak into the living room. Further, when the combustion exhaust gas leaked from the attachment port or the like of the heating fan 144 flows in the vicinity of the hot water supply fan 134, the combustion exhaust gas is supplied to the hot water supply burner 132 by the hot water supply fan 134, and the hot water supply burner 132 during combustion is supplied. Incomplete combustion may occur. Therefore, in the hot water supply and heating system 2 of the present embodiment, when the hot water supply burner 132 and the hot water supply fan 134 are operated, the combustion exhaust gas of the hot water supply burner 132 is prevented from flowing into the heating burner 142 side. The heating fan 144 is activated. Similarly, in the hot water supply and heating system 2 of the present embodiment, when the heating burner 142 and the heating fan 144 are operated, in order to prevent combustion exhaust gas from the heating burner 142 from flowing into the hot water supply burner 132 side, The hot water supply fan 132 is operated.

  The control device 100 is electrically connected to the tank 10, the hot water supply system 104, the heat pump system 106, the heating system 108, and the heating device 120, and controls the operation of each component.

(Operation of hot water heating system)
Next, the operation of the hot water supply / heating system 2 of the present embodiment will be described. The hot water supply and heating system 2 can execute a heat storage operation, a hot water supply operation, and a heating operation. The hot water supply and heating system 2 of the present embodiment can simultaneously execute two or more operations among a heat storage operation, a hot water supply operation, and a heating operation. Hereinafter, each operation will be described.

(Heat storage operation)
The heat storage operation is an operation in which water in the tank 10 is heated by heat generated by the heat pump 50. When execution of the heat storage operation is instructed by the control device 100, the heat pump 50 operates and the circulation pump 54 rotates. As a result, the water introduced from the tank 10 into the heat storage tank water circulation path 52 is heated by the heat pump 50, and the heated water is returned to the upper portion of the tank 10. Thereby, hot water is stored in the tank 10. A high temperature water layer is formed in the upper part of the tank 10, and a low temperature water layer is formed in the lower part.

(Hot water operation)
The hot water supply operation is an operation for supplying water in the tank 10 to the hot water tap 38. When the hot water tap 38 is opened, the control device 100 opens the mixing valve 36a. Then, tap water flows into the lower part of the tank 10 from the tap water introduction path 24 (first introduction path 24 a) due to the water pressure from the tap water supply source 32. At the same time, the hot water in the upper part of the tank 10 is supplied to the hot water tap 38 via the hot water supply path 36. When the temperature of the water supplied from the tank 10 to the hot water supply path 36 (that is, the detected temperature of the thermistor 12) is higher than the hot water supply set temperature, the control device 100 adjusts the mixing valve 36a to adjust the second introduction path. The tap water is introduced into the hot water supply path 36 from 24b. The control apparatus 100 adjusts the opening ratio of the mixing valve 36a so that the temperature of the water supplied to the hot-water tap 38 matches the hot-water supply set temperature. On the other hand, when the temperature of the water supplied from the tank 10 to the hot water supply path 36 is lower than the hot water supply set temperature, the control device 100 operates the hot water supply heating unit 130 (see FIG. 1). Accordingly, the water passing through the hot water supply path 36 is heated by the gas combustion heat of the hot water supply burner 132. The heated water is mixed with the water from the bypass passage 36 b whose opening degree is adjusted by the bypass control valve 36 c and supplied to the hot water tap 38. The control device 100 controls the output of the hot water burner 132 so that the temperature of the water supplied to the hot water tap 38 matches the hot water supply set temperature.

(Heating operation)
The heating operation is an operation for heating the living room by operating the heating terminal 76. When execution of the heat storage operation is instructed by the control device 100, the circulation pump 22 and the circulation pump 74 rotate. Thereby, water (warm water) introduced into the heating tank water circulation path 20 from the upper part of the tank 10 passes through the heat exchanger 60 and is returned to the lower part of the tank 10, and the water in the heating path 71 circulates. . At the start of the heating operation, the opening degree of the adjustment valve 90 is adjusted so that the entire amount of water in the heating path 71 passes through the heat recovery path 88 (heat exchanger 60) and does not pass through the bypass path 94 at all. . Thereby, the water passing through the heat recovery path 88 is heated by the heat of the hot water in the heating tank water circulation path 20 when passing through the heat exchanger 60. As a result, the water heated by the heat exchanger 60 is supplied to the heating terminal 76. The heating terminal 76 heats the living room using the heat of the supplied water. Moreover, in the hot water supply and heating system 2 of the present embodiment, when performing the heating operation, the control device 100 further operates the heat pump 50 and the circulation pump 54 and performs the above heat storage operation together, thereby continuing in the tank 10. To store hot water.

  The control device 100 operates the heating heating unit 140 when the temperature detected by the thermistor 78 is lower than the heating set temperature for covering the required temperature at the heating terminal 76. In that case, the water passing through the heating forward path 72 is heated by the gas combustion heat of the heating burner 142. The heated water is supplied to the heating terminal 76. The control device 100 controls the output of the heating burner 142 so that the temperature of the water supplied to the heating terminal 76 matches the heating set temperature. At this time, as described above, the control device 100 operates the heating unit 140 (the heating burner 142 and the heating fan 144) in order to prevent the combustion exhaust gas from the heating burner 142 from flowing into the hot water supply burner 132 side. At the same time, the hot water supply fan 132 is operated.

(Processing executed when the heating operation is performed without operating the heating unit 140 for heating)
FIG. 2 is a flowchart illustrating a process executed by the control device 100 when the heating operation is performed without operating the heating unit 140 in the hot water supply / heating system 2 of the present embodiment. The control device 100 performs the heating operation start instruction by the user and starts the heating operation without operating the heating heating unit 140, or while operating the heating heating unit 140 before the processing of FIG. When the operation is performed and the heating heating unit 140 is stopped from the state, the process of FIG. 2 is started.

  In S10, the control device 100 operates the circulation pump 22, the circulation pump 74, the heat pump 50, and the circulation pump 54. Thereby, the heating operation using only the heat of the hot water in the tank 10 as a heat source is started as described above. In addition, before the process of FIG. 2 starts, heating operation is performed while operating the heating unit 140 for heating, and when the process of FIG. 2 is started by stopping the heating unit 140 for heating, In S10, the control device 100 continues to operate the circulation pump 22, the circulation pump 74, the heat pump 50, and the circulation pump 54.

  Next, in S12, the control device 100 monitors whether an instruction to end the heating operation is performed. At the same time, in S13, the control device 100 monitors that the heating unit 140 for heating is activated. At the same time, in S14, the control device 100 monitors the operation of the hot water supply heating unit 130.

  When an instruction to end the heating operation is input by the user, control device 100 determines YES in S12. In this case, the control device 100 ends the heating operation while ending the process of FIG. In this case, the control device 100 stops the circulation pump 22, the circulation pump 74, the heat pump 50, and the circulation pump 54.

  On the other hand, when the control device 100 performs the heating operation without operating the heating unit 140 for heating, the detected temperature of the thermistor 78 becomes lower than the heating set temperature for covering the required temperature at the heating terminal 76. Then, the heating unit 140 for heating is operated. In this case, the control device 100 determines YES in S13 and ends the process of FIG. In this case, the control device 100 operates the heating heating unit 140 in addition to the circulation pump 22, the circulation pump 74, the heat pump 50, and the circulation pump 54. At this time, the control device 100 also operates the heating unit 140 (the heating burner 142 and the heating fan 144) in order to prevent the combustion exhaust gas from the heating burner 142 from flowing into the hot water supply burner 132 side. Then, the hot water supply fan 132 is operated.

  Further, when the heating water supply operation is executed and the hot water supply heating unit 130 is operated while the heating operation using only the heat of the hot water in the tank 10 as a heat source is performed without operating the heating unit 140 for heating. There is. At this time, the control device 100 operates the hot water supply heating unit 130 (the hot water supply burner 132 and the hot water supply fan 134) in order to prevent combustion exhaust gas from the hot water supply burner 132 from flowing into the installation area of the heating burner 142. In addition, the heating fan 144 is operated. As a result, the water in the heating forward path 72 passing through the combustion chamber 122 of the heating device 120 may be cooled by the influence of the wind generated by the heating fan 144. When the temperature of the water passing through the heating forward path 72 passing through the combustion chamber 122 is lowered, the heating efficiency is lowered. In this case, the control device 100 determines YES in S14, and proceeds to S16.

  In S16, the control device 100 stops the circulation pump 74. Thereby, the circulation of the water in the heating path 71 including the heating forward path 72 is stopped. Note that the control device 100 continues to operate the heating fan 144 during this time. By stopping the circulation of the water in the heating path 71, the water in the heating path 71 passes through the combustion chamber 122 of the heating device 120 and is cooled by the influence of the wind generated by the heating fan 144. Can be prevented.

  When the circulation pump 74 is stopped in S16, in S18, the control device 100 monitors that the hot water supply heating unit 130 is stopped. The hot water supply operation performed by operating the hot water supply heating unit 130 is often completed in a short time. Therefore, when hot water supply heating unit 130 stops, control device 100 determines YES in S18, and proceeds to S20. Note that when the hot water supply heating unit 130 stops, the control device 100 also stops the heating fan 144 that has been operating.

  In S20, the control device 100 operates the circulation pump 74 again. Thereby, the circulation of the water in the heating path 71 is restarted. That is, as described above, in the present embodiment, the control device 100 is limited to the time when the hot water supply operation performed by operating the hot water supply heating unit 130 is being performed (while the hot water supply fan 134 and the heating fan 144 are operating). When the hot water supply operation performed by stopping the circulation of water in the heating path 71 and operating the hot water supply heating unit 130 is completed (when the hot water supply fan 134 and the heating fan 144 are stopped), Resume water circulation. Therefore, a decrease in heating efficiency due to the influence of wind generated by the heating fan 144 can be minimized. When S20 ends, the control device 100 returns to the monitoring of S12, S13, and S14 again.

  In the above, the structure and operation | movement of the hot-water supply heating system 2 of a present Example were demonstrated. As described above, in the hot water supply and heating system 2 according to the present embodiment, the hot water supply heating unit 130 operates and the heating fan 144 also operates while the heating operation is performed without operating the heating heating unit 140. When doing, it is suppressed that the water in the heating path 71 passes the heating apparatus 120. Therefore, it is possible to suppress the water passing through the heating path 71 from being cooled by the influence of wind accompanying the operation of the heating fan 144. As a result, even if the hot water supply heating unit 130 is activated and the heating fan 144 is activated during the heating operation without operating the heating heating unit 140, the heating efficiency is lowered. It becomes difficult to do. Therefore, according to the hot water supply and heating system 2 of the present embodiment, the hot water supply burner 132, the hot water supply fan 134, the heating burner 142, and the heating fan 144 are heated together in one place using, for example, the same case 121. Even if it is a case where the apparatus 120 is comprised, it can suppress that heating efficiency falls.

  The correspondence relationship between the present embodiment and claims will be described. The case of YES in S14 of FIG. 2 is an example of a “specific case”. The circulation pump 74 is an example of a “pump”.

(Second embodiment)
Next, the hot water supply / heating system 2 of the second embodiment will be described with reference to FIGS. 3 and 4 focusing on differences from the first embodiment. FIG. 3 shows a configuration of the hot water supply / heating system 2 of the present embodiment. The basic configuration of the hot water supply / heating system 2 of this embodiment is also the same as that of the hot water supply / heating system 2 (FIG. 1) of the first embodiment. However, in the hot water supply and heating system 2 of the present embodiment, the bypass path 150 that connects the upstream side and the downstream side of the heating device 120 is provided in the heating forward path 72. That is, the bypass passage 150 is a passage that bypasses the heating device 120. The bypass passage 150 is provided with an opening / closing valve 152 for opening and closing the bypass passage 150. The on-off valve 152 is always fully closed except in the case described later (in the case of YES in S34 of FIG. 4).

(Processing executed when the heating operation is performed without operating the heating unit 140 for heating)
In the present embodiment, when the heating operation is performed without operating the heating unit 140 for heating, the content of the processing executed by the control device 100 is also different from that of the first embodiment. FIG. 4 is a flowchart illustrating processing executed by the control device 100 when the heating operation is performed without operating the heating unit 140 for heating in the hot water supply / heating system 2 of the present embodiment.

  The process start conditions in FIG. 4 are the same as the process start conditions in FIG. 2 of the first embodiment. As described above, the control device 100 adjusts the opening degree of the on-off valve 152 so as to fully close the bypass passage 150 even during the heating operation without operating the heating unit 140 for heating. . Also, the process of S30 is the same as S10 of FIG. In this embodiment, when S30 ends, the control device 100 performs monitoring of S32, S33, and S34. The monitoring at S32, S33, and S34 is the same as the monitoring at S12, S13, and S14 in FIG. In the present embodiment, if YES in S34 (when the hot water supply heating unit 130 operates), the control device 100 proceeds to S36.

  In S <b> 36, the control device 100 fully opens the on-off valve 152 and fully opens the bypass passage 150. Thereby, most of the water in the heating path 71 passes through the bypass path 150 and hardly passes through the combustion chamber 122 of the heating device 120. To be exact, when the bypass passage 150 is opened, the pressure loss of the bypass passage 150 is significantly smaller than the pressure loss of the heating forward passage 72 than the heating forward passage 72, so that most of the water in the heating passage 71 is bypass passage. 150 is passed. Although a slight amount of water also flows in the heating forward path 72, an amount that reduces the efficiency of the heating operation does not flow. When the water in the heating path 71 does not pass through the combustion chamber 122 of the heating apparatus 120, the water in the heating path 71 passes through the combustion chamber 122 of the heating apparatus 120, and the hot water supply heating unit 130 (hot water supply burner). 132 and the hot water supply fan 134) can be prevented from being cooled by the influence of the wind generated by the heating fan 144 operating together.

  When the on-off valve 152 is opened in S36, in S38, the control device 100 monitors that the hot water supply heating unit 130 is stopped. When hot water supply heating unit 130 stops, control device 100 determines YES in S38, and proceeds to S40. Note that when the hot water supply heating unit 130 stops, the control device 100 also stops the heating fan 144 that has been operating.

  In S40, the control device 100 closes the on-off valve 152 again. As a result, almost all of the water in the heating path 71 passes through the combustion chamber 122 of the heating device 120 again. That is, as described above, in the present embodiment, the control device 100 is limited to the time when the hot water supply operation performed by operating the hot water supply heating unit 130 is being performed (while the hot water supply fan 134 and the heating fan 144 are operating). The bypass passage 150 is fully opened so that the water in the heating passage 71 does not pass through the combustion chamber 122 of the heating device 120, and the hot water supply operation performed by operating the hot water supply heating unit 130 is completed (a hot water supply fan). 134 and when the heating fan 144 is stopped), the water in the heating path 71 passes through the combustion chamber 122 of the heating device 120 again. Therefore, a decrease in heating efficiency due to the influence of the wind generated by the heating fan 144 can be minimized. When S40 ends, the control device 100 returns to the monitoring of S32, S33, and S34 again.

  In the above, the structure and operation | movement of the hot-water supply heating system 2 of a present Example were demonstrated. As described above, the hot water supply / heating system 2 of the present embodiment also operates the hot water supply heating unit 130 while operating the heating operation without operating the heating heating unit 140, and the heating fan 144 also operates. When doing, it is suppressed that the water in the heating path 71 passes the heating apparatus 120. Therefore, it is possible to suppress the water passing through the heating path 71 from being cooled by the influence of wind accompanying the operation of the heating fan 144. As a result, even if the hot water supply heating unit 130 is activated and the heating fan 144 is activated during the heating operation without operating the heating heating unit 140, the heating efficiency is lowered. It becomes difficult to do. Therefore, according to the hot water supply and heating system 2 of the present embodiment, the hot water supply burner 132, the hot water supply fan 134, the heating burner 142, and the heating fan 144 are heated together in one place using, for example, the same case 121. Even if it is a case where the apparatus 120 is comprised, it can suppress that heating efficiency falls.

  Each embodiment has been described in detail above, but these are merely examples and do not limit the scope of the claims. The technology described in the claims includes various modifications and changes of the specific examples illustrated above.

(Modification 1) In each of the above embodiments, the heating device 120 includes two burners, a hot water supply burner 132 and a heating burner 142, and two fans, a hot water supply fan 134 and a heating fan 144. Yes. However, the heating device 120 may include only one fan.

(Modification 2) The outer periphery of the piping of the part which passes the inside of the combustion chamber 122 among the heating outbound paths 72 may be covered with the heat insulating material. By setting it as such a structure, it can further suppress that the water which passes the inside of the heating path 71 is cooled by the influence of the wind accompanying the action | operation of the hot water supply fan 134. FIG.

(Modification 3) In each of the above embodiments, the combustion chamber 122 stores the hot water supply burner 132 and the heating burner 142, and the combustion exhaust gas generated by the hot water supply burner 132 and the heating burner 142 is out of the combustion chamber 122. There is only one exhaust port 124 for sending out the air. Instead, the inside of the combustion chamber 122 is completely partitioned into a first area for storing the hot water supply burner 132 and a second area for storing the heating burner 142, and the first area has a hot water supply burner 132. Is provided with an exhaust port for sending the combustion exhaust gas generated at the outside of the first region, and the second region is provided with an exhaust port for sending the combustion exhaust gas generated by the heating burner 142 out of the second region. May be. According to this modification, for example, even if the hot water supply burner 132 and the hot water supply fan 134 are operated while the heating fan 144 is stopped, the combustion exhaust gas of the hot water supply burner 132 is installed in the heating burner 142. There is no risk of flowing into the second region. Therefore, when the hot water supply burner 132 and the hot water supply fan 134 operate, it is not necessary to operate the heating fan 144 at the same time. However, even in the configuration of the present modified example, as the inside of the case 121 becomes negative pressure with the operation of the hot water supply fan 134, the outside air flows into the second region, and the water in the heating forward path 72 is cooled. May be. Therefore, also in this modification, by applying the technique of each of the above-described embodiments, when the heating unit for hot water supply 130 operates while the heating operation is performed without operating the heating unit 140 for heating, By suppressing the water in the path 71 from passing through the heating device 120, the water passing through the heating path 71 is prevented from being cooled by the influence of the outside air flowing into the second region due to the negative pressure. be able to.

2: Hot water supply and heating system 10: Tanks 12, 14, 16, 18: Thermistor 20: Heating tank water circulation path 22: Circulation pump 24: Tap water introduction path 24a: First introduction path 24b: Second introduction path 26: Check Valve 28: Check valve 30: Water quantity sensor 32: Tap water supply source 34: Water quantity sensor 36: Hot water supply path 36a: Mixing valve 36b: Bypass path 36c: Bypass control valve 38: Hot water tap 50: Heat pump 52: Heat storage tank water circulation Path 54: Circulation pump 60: Heat exchanger 70: Systurn 71: Heating path 72: Heating path 74: Circulation pump 76: Heating terminal 78: Thermistor 84: Heating return path 86: Thermistor 88: Heat recovery path 90: Regulating valve 92: Thermistor 94: Heating bypass 96: Circulating channel 98: Thermistor 100: Controller 104: Hot water supply system 106: Heat pump system 108 Heating system 120: Heating device 121: Case 122: Combustion chamber 124: Exhaust port 126: Partition wall 130: Hot water supply heating unit 132: Hot water supply burner 134: Hot water supply fan 140: Heating heating unit 142: Heating burner 144: Heating fan 150: Bypass passage 152: On-off valve

Claims (3)

A hot water and heating system,
A hot water supply route for supplying hot water to the hot water supply terminal,
A heating path for circulating the heat medium between the heating terminal and the heating terminal;
A heating device through which a heating path and a hot water supply path pass,
The heating device includes a combustion chamber, a hot water supply burner that burns gas in the combustion chamber and heats water in the hot water supply passage, and a heating burner that burns gas in the combustion chamber and heats the heat medium in the heating passage. A fan that takes in combustion air into the combustion chamber and sends out combustion exhaust gas to the outside of the combustion chamber,
In certain cases where hot water supply operation is performed in which the hot water supply burner is burned while the heating terminal is performing heating operation without burning the heating burner, the heat medium in the heating path is prevented from passing through the heating device. To
Hot water heating system. A pump that is a driving source for circulating the heat medium in the heating path;
Stopping the pump in the specific case,
The hot water supply and heating system according to claim 1. A bypass path provided in the heating path to connect the upstream side and the downstream side of the heating device;
An on-off valve that opens and closes the bypass path;
Open the on-off valve in the specific case,
The hot water supply and heating system according to claim 1.

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