JP3855456B2 - Heat source equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present invention relates to a hot water supply and heating, a hot water supply and a bath, and a heat source device used for heating and a bath.
[0002]
[Prior art]
  Conventionally, this type of heat source apparatus is generally the one described in Japanese Utility Model Publication No. 2-36037. In this apparatus, as shown in FIG. 5, the main heat transfer tube 1 and the sub heat transfer tube 2 cross the downstream side of the combustion section 3 and are provided in an integrated configuration. The main heat transfer tube 1 is located on the upstream side of the sub heat transfer tube 2. The heat receiving fins 4 are fixed to the main heat transfer tube 1 and the sub heat transfer tube 2 by penetration. The main temperature detector 5 and the sub temperature detector 6 are provided on the respective outlet sides of the main heat transfer tube 1 and the sub heat transfer tube 2 and detect the hot water temperature. The temperature detector 7 is provided on the inlet side of the sub temperature detector 6. A water bypass valve 9 is provided in the main bypass circuit 8 connecting the inlet side and the outlet side of the main heat transfer tube 1. A water flow means 10 including a circulation pump is for passing hot water in a bathtub 11 as a heat terminal to the sub heat transfer pipe 2. The main operation control unit 12 controls the combustion unit 3 so that the output of the main temperature detector 5 preferentially reaches the target value when the main operation is requested. Only during the sub-independent operation, the sub-operation control unit 13 controls the combustion unit 3 so that the output of the sub-temperature detector 6 becomes the target value. The auxiliary temperature riser 14 controls the water proportional valve 9 to be opened when the auxiliary hot water temperature is lower than the required temperature.
[0003]
  Next, the main single operation will be described. When the currant or the like is opened and water is passed through the main heat transfer tube 1, the combustion unit 3 starts combustion. Then, combustion heat is transmitted from the heat receiving fins 4 to the main heat transfer tube 1, and hot water is discharged from the main heat transfer tube 1. At that time, the main operation control unit 12 adjusts the combustion amount of the combustion unit 3 so that the output of the main temperature detector 5 becomes a target value.
[0004]
  Next, the sub-independent operation will be described. When the water flow means 10 is driven and water is passed through the auxiliary heat transfer tube 2, the combustion unit 3 starts combustion. The combustion heat is transmitted from the heat receiving fins 4 to the sub heat transfer tube 2, and the hot water is discharged from the sub heat transfer tube 2. At that time, the auxiliary operation control unit 13 adjusts the combustion amount of the combustion unit 3 so that the output of the auxiliary temperature detector 6 becomes the target value. Thereafter, when the output of the temperature detector 7 reaches the required value, the water passing means 10 is stopped.
[0005]
  Next, the main / sub simultaneous operation will be described. Even when a currant or the like is opened and water is passed through the main heat transfer tube 1 and warm water is passed through the sub heat transfer tube 2 by the water flow means 10, the combustion section 3 is combusted in the same manner as in the main single operation, and the main temperature The main operation control unit 12 adjusts the combustion amount so that the output of the detector 5 becomes the target value (main priority control). On the other hand, although the combustion heat is mainly transmitted to the main heat transfer tube 1, the remaining combustion heat is transferred to the sub heat transfer tube 2, and the hot water whose temperature has risen circulates from the sub heat transfer tube 2 to the bathtub 11. In particular, when the required capacity for main operation is small and the required capacity for auxiliary operation is large, the main operation control unit 12 adjusts the combustion amount to be small, so that the hot water in the auxiliary heat transfer pipe 2 is lower than the required temperature.
It will be lost.
[0006]
  At that time, the auxiliary temperature riser 14 opens the water proportional valve 9, so that water flows through the main bypass circuit 8. Accordingly, the amount of hot water flowing through the main heat transfer tube 1 is reduced, and the heat transfer coefficient inside the main heat transfer tube 1 is reduced, so that the heat absorption amount of the main heat transfer tube 1 is reduced. Furthermore, since the main operation control unit 12 increases the combustion amount by the amount of heat absorption of the main heat transfer tube 1, the heat absorption amount to the sub heat transfer tube 2 also increases, and the hot water in the sub heat transfer tube 2 approaches the required temperature. be able to.
[0007]
[Problems to be solved by the invention]
  In the conventional heat source device described above, in the main-sub-simultaneous operation where the required capacity of the main operation is large and the required capacity of the sub-operation is small, the combustion unit 3 is set so that the output of the main temperature detector 5 becomes the target value. It combusts and the main operation control unit 12 adjusts the amount of combustion greatly, so that the hot water in the auxiliary heat transfer tube 2 has a problem that it becomes higher than the required temperature. When this high-temperature hot water circulates from the auxiliary heat transfer tube 2, for example, when the heat terminal is a heater, the room temperature becomes too high, causing discomfort.
[0008]
  Moreover, when the heat insulation of the bathtub 11 is requested | required, the temperature detector 7 needs to grasp | ascertain the temperature of the bathtub 11 in advance. For this purpose, the water flow means 10 periodically passes the hot water in the bathtub 11 to the auxiliary heat transfer pipe 2 and monitors the temperature of the hot water with the temperature detector 7. At that time, in the case of the main single operation, the hot water always has a problem that the temperature rises while flowing through the auxiliary heat transfer tube 2. That is, even when the output of the auxiliary temperature detector 6 is higher than the target value, the hot water in the bathtub 11 is replenished. In addition, when the output of the auxiliary temperature detector 6 is lower than the target value, the auxiliary operation is performed to replenish the hot water in the bathtub 11.
[0009]
  Therefore, the present invention solves the above-described problems, and provides a heat source device that can obtain the temperature at which the sub-warm water is required even in the case of the main sub-simultaneous operation having a large main operation requirement capacity and a small sub operation requirement ability. The purpose is to provide.
[0010]
[Means for Solving the Problems]
  In order to solve the above problems, the present invention provides a main heat transfer tube disposed on the downstream side of the combustion section, andCirculate hot water to the thermal terminalA sub-heat transfer tube, a heat-receiving fin penetrating and fixing to the main heat transfer tube and the sub-heat transfer tube, a main temperature detector provided on an outlet side of the main heat transfer tube, and an inlet side and an outlet side of the sub-heat transfer tube A connected sub-bypass circuit, a sub-temperature detector provided on the downstream side from the junction of the sub-bypass circuit and the sub-heat transfer tube,Usually blocked,Sub opening / closing means for opening and closing the passage of the sub bypass circuit;A main operation control unit that controls the combustion unit, and a sub-temperature suppression unit that controls the sub-opening and closing means,When main / sub simultaneous operation is requestedThe main operation control unitPreferentially control the combustion section so that the output of the main temperature detector reaches the target valueAnd in that caseWhen the output of the sub-temperature detector exceeds a reference value,The auxiliary temperature suppression unitThe sub opening / closing means is opened so as to open the passage of the sub bypass circuit.ControlIs.
[0011]
  When the output of the sub-temperature detector exceeds the reference value, the sub-temperature suppression unit controls the sub-opening / closing means so as to open the sub-bypass circuit, so that the hot water flows through the sub-bypass circuit and the sub-heat transfer pipe, The heat absorption of the heat pipe is reduced. Subsequently, since the main operation control unit reduces the combustion amount by the amount of heat absorption of the sub heat transfer tube, the heat absorption amount of the sub heat transfer tube also decreases. As a result, the hot water in the auxiliary heat transfer tube can approach the required temperature.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
  The present invention can be carried out in the form described in each claim, and as in claim 1, a main heat transfer tube disposed on the downstream side of the combustion section, andCirculate hot water to the thermal terminalA sub-heat transfer tube, a heat-receiving fin penetrating and fixing to the main heat transfer tube and the sub-heat transfer tube, a main temperature detector provided on an outlet side of the main heat transfer tube, and an inlet side and an outlet side of the sub-heat transfer tube Connected sub-bypass circuit and said sub-bypass circuit
And a sub-temperature detector provided downstream from the junction of the sub-heat transfer tubes,Usually blocked,Sub opening / closing means for opening and closing the passage of the sub bypass circuit;A main operation control unit that controls the combustion unit, and a sub-temperature suppression unit that controls the sub-opening and closing means,When main / sub simultaneous operation is requestedThe main operation control unitPreferentially control the combustion section so that the output of the main temperature detector reaches the target valueAnd in that caseWhen the output of the sub-temperature detector exceeds a reference value,The auxiliary temperature suppression unitThe sub opening / closing means is opened so as to open the passage of the sub bypass circuit.ControlIs. When the output of the sub-temperature detector exceeds the reference value, the sub-temperature suppression unit controls the sub-opening / closing means so as to open the sub-bypass circuit, so that a portion of the hot water flows through the sub-bypass circuit. The amount of hot water flowing through the heat pipe decreases, and the amount of heat absorbed by the sub heat transfer pipe decreases. Subsequently, since the main operation control unit reduces the combustion amount by the amount of heat absorption of the sub heat transfer tube, the heat absorption amount of the sub heat transfer tube also decreases. As a result of the decrease in the amount of hot water flowing through the auxiliary heat transfer tube, the hot water in the auxiliary heat transfer tube becomes higher, but since it is mixed with the hot water in the auxiliary bypass circuit, the hot water in the auxiliary heat transfer tube can eventually approach the required temperature.
[0013]
  Further, after the auxiliary opening / closing means operates and opens the passage of the auxiliary bypass circuit as described in claim 2, the passage of the auxiliary bypass circuit is closed again when the combustion amount of the combustion section falls below the reference value. A sub-temperature raising unit for controlling the sub-opening / closing means.
[0014]
  Then, after the auxiliary temperature control unit controls the auxiliary opening / closing means so as to open the passage of the auxiliary bypass circuit, the main operation control unit adjusts the combustion amount of the combustion unit to be small when the required capacity of the main operation decreases. . When the combustion amount of this combustion part falls below a reference value, the auxiliary temperature suppression release part controls the auxiliary opening / closing means so as to close the passage of the auxiliary bypass circuit again, so the amount of hot water flowing through the auxiliary heat transfer pipe increases, The amount of heat absorbed by the auxiliary heat transfer tube increases. Subsequently, since the main operation control unit increases the combustion amount by the amount of heat absorption of the sub heat transfer tube, the heat absorption amount to the sub heat transfer tube also increases. As a result, the hot water in the auxiliary heat transfer tube can approach the required temperature.
[0015]
  A main heat transfer tube disposed downstream of the combustion section as defined in claim 3Circulate hot water to the thermal terminalA sub-heat transfer tube, the main heat transfer tube, a heat receiving fin penetrating and fixing to the sub-heat transfer tube, a main temperature detector provided on the outlet side of the main heat transfer tube, and a substantially intermediate and outlet side of the sub-heat transfer tube A connected sub-bypass circuit, the sub-heat transfer tube and theViceA sub-temperature detector provided downstream from the junction of the bypass circuit;Usually connected to the downstream part of the heat transfer tube,Switching means for switching the passage between the downstream portion of the auxiliary heat transfer tube and the auxiliary bypass circuit;A main operation control unit that controls the combustion unit, and a sub-temperature suppression unit that controls the switching means,When main / sub simultaneous operation is requestedThe main operation control unitPreferentially control the combustion section so that the output of the main temperature detector reaches the target valueAnd in that caseWhen the output of the sub-temperature detector exceeds a reference value,The auxiliary temperature suppression unitThe passage is switched from the downstream portion of the auxiliary heat transfer tube to the auxiliary bypass circuit.SaidControls switching meansDoIs. And when the output of the sub-temperature detector exceeds the reference value, the sub-temperature suppression unit controls the switching means so as to open the sub-bypass circuit, so that all the hot water flows through the sub-bypass circuit, and the downstream portion of the sub-heat transfer tube Then you can't absorb heat.
[0016]
  Accordingly, the main operation control unit reduces the combustion amount, so that the heat absorption amount in the upstream portion of the sub heat transfer tube is also slightly reduced. That is, since heat can be absorbed only at the upstream portion of the auxiliary heat transfer tube, the hot water in the auxiliary heat transfer tube can approach the required temperature.
[0017]
  Further, after the switching means operates to switch the passage from the downstream side of the auxiliary heat transfer tube to the auxiliary bypass circuit as described in claim 4, when the combustion amount in the combustion section falls below the reference value, the auxiliary bypass circuit A sub-temperature suppression release unit that controls the switching means to switch the passage again to the downstream portion of the sub-heat transfer tube is provided. Then, after the sub-temperature suppression unit controls the switching means so as to switch the passage from the downstream portion of the sub-heat transfer tube to the sub-bypass circuit, when the required capacity for main operation decreases, the main operation control unit performs the combustion of the combustion unit. Adjust the amount small. Subsequently, when the combustion amount in the combustion section falls below the reference value, the sub temperature suppression release section switches the passage from the sub bypass circuit to the downstream section of the sub heat transfer tube.
Therefore, the downstream portion of the auxiliary heat transfer tube starts to absorb heat. Accordingly, the main operation control unit increases the amount of combustion, so the amount of heat absorbed at the upstream portion of the sub heat transfer tube also increases, and eventually the hot water can approach the required temperature.
[0018]
  Further, as described in claim 5, when the temperature detector provided on the inlet side of the auxiliary heat transfer tube passes the hot water of the heat terminal, and when the detection of the thermal load is requested during the main operation, And a state detector that controls the switching means so as to switch the passage from the heat transfer tube to the sub bypass circuit. And when the heat insulation of a bathtub is requested | required during the main driving | operation, while a water flow means makes the warm water of a bathtub flow, a switching means is controlled so that a state detection part may switch a channel | path from a sub heat exchanger tube to a sub bypass circuit. . As a result, the hot water circulates again from the sub bypass circuit to the heat terminal without passing through the sub heat transfer tube. That is, the temperature of the hot water can be detected by the temperature detector without increasing the temperature even during the main single operation.
[0019]
  In addition, the main heat transfer tube disposed on the downstream side of the combustion section as described in claim 6 andCirculate hot water to the thermal terminalA sub-heat transfer tube, the main heat transfer tube, a heat receiving fin fixed through the sub-heat transfer tube, a main temperature detector provided on the outlet side of the main heat transfer tube, and a sub-temperature provided on the outlet side of the sub-heat transfer tube A detector and water flow means for passing warm water through the auxiliary heat transfer tube;A water flow control unit for controlling the water flow means, and a main operation control unit for controlling the combustion unit,When main / sub simultaneous operation is requestedThe main operation control unitPreferentially control the combustion section so that the output of the main temperature detector reaches the target valueAnd that WhenWhen the output of the sub-temperature detector exceeds a reference value, theThe water flow control unitWhen the water flow means is stopped, and then the combustion amount in the combustion section falls below the reference valueThe water flow control unitDriving the water flow meansDoIs. And when the output of the temperature detector exceeds the reference value, the water flow control unit stops the water flow means and stops the sub operation, so that the hot water is not circulated to the heat terminal. When the required capacity decreases, the main operation control unit adjusts the combustion amount of the combustion unit to be small. And when the combustion amount of a combustion part falls below a reference value, since a water flow control part re-drives a water flow means, reheating and heating can be restarted.
[0020]
【Example】
  Embodiments of the present invention will be described below with reference to the drawings.
[0021]
  (Example 1)
  FIG. 1 is a configuration diagram of a heat source device according to a first embodiment of the present invention. In the figure, 15 is a combustion part. Reference numerals 16 and 17 denote a main heat transfer tube and a sub heat transfer tube. A sub heat transfer tube 17 is disposed on the downstream side of the main heat transfer tube 16 and is brazed to a surface contact to form an integral structure.
[0022]
  The integrated main heat transfer tube 16 and sub heat transfer tube 17 are provided in a staggered manner across the downstream side of the combustion section 15. Reference numeral 18 denotes a heat receiving fin that is fixedly penetrated (brazed) to the main heat transfer tube 16 and the sub heat transfer tube 17. 19 and 20 are a main temperature detector and a sub temperature detector provided on the outlet side of the main heat transfer tube 16 and the sub heat transfer tube 17, respectively, for detecting the tapping temperature. Reference numeral 21 denotes a temperature detector provided on the inlet side of the auxiliary heat transfer tube 17 for detecting the return temperature of the hot water. Reference numeral 22 denotes a main operation control unit that preferentially controls the combustion unit 15 so that the output of the main temperature detector 19 becomes a target value when the main / sub simultaneous operation is requested. Reference numeral 23 denotes a sub bypass circuit that connects the inlet side of the sub heat transfer tube 17 and the upstream portion of the sub temperature detector 20 on the outlet side. Reference numeral 24 denotes auxiliary opening / closing means including a solenoid valve and a servo valve provided in the auxiliary bypass circuit 23. Reference numeral 25 denotes a sub-temperature suppression unit that controls the sub-opening / closing means 24 so as to open the passage of the sub-bypass circuit 23 when the output of the sub-temperature detector 20 exceeds the reference value during the main-sub simultaneous operation. . Reference numeral 26 denotes a sub-operation control unit that controls the gas proportional valve and the fan speed of the combustion unit 15 in order to adjust the outlet temperature of the sub-heat transfer tube 17 only during the sub-independent operation. Reference numeral 27 denotes a main bypass circuit in which the inlet side and the outlet side of the main heat transfer tube 16 are connected, and a water proportional valve 28 is provided.
[0023]
  29 is a sub-temperature rise part, and the water proportional valve 28 is opened when the hot water in the sub-heat transfer tube is lower than the required temperature. Reference numeral 30 denotes a water passage means including a circulation pump. 31 is a bathtub of a thermal terminal.
[0024]
  Next, the main single operation will be described. When the currant or the like is opened and water is passed through the main heat transfer tube 16, the combustion unit 15 starts combustion. The combustion heat is transmitted from the heat receiving fins 18 to the main heat transfer tube 16, and the hot water is discharged from the outlet of the main heat transfer tube 16. At that time, the main operation control unit 22 adjusts the combustion amount of the combustion unit 15 so that the output of the main temperature detector 19 becomes a target value.
[0025]
  Next, the sub-independent operation will be described. When the water flow means 30 is driven and water is passed through the auxiliary heat transfer tube 17, the combustion unit 15 starts combustion. The combustion heat is transmitted from the heat receiving fins 18 to the sub heat transfer tube 17, and hot water is discharged from the outlet of the sub heat transfer tube 17. At that time, the auxiliary operation control unit 25 adjusts the combustion amount of the combustion unit 15 so that the output of the auxiliary temperature detector 20 becomes the target value. When the heat terminal is the bathtub 31, the auxiliary operation control unit 25 may fix the combustion amount of the combustion unit 15.
[0026]
  Next, the main / sub simultaneous operation will be described. Even when the curan is opened and passed through the main heat transfer pipe 16 and warm water is passed through the auxiliary heat transfer pipe 17 by the water passing means 30, the required main temperature detector 19 The combustion unit 15 burns so that the output becomes the target value, and the main operation control unit 22 adjusts the combustion amount (main priority control).
[0027]
  On the other hand, although the combustion heat is mainly transmitted to the main heat transfer tube 16, the remaining combustion heat is transferred to the sub heat transfer tube 17, and the sub-warm water whose temperature has increased is circulated to the bathtub 31. In particular, when the required capacity of the main operation is large and the required capacity of the sub operation is small, the main operation control unit 22 adjusts the combustion amount so that the required main hot water temperature is reached. The hot water in the heat transfer tube 17 is considerably higher than the required temperature. At that time, when the output of the sub-temperature detector 20 exceeds the reference value, the sub-temperature suppression unit 25 controls the sub-opening / closing means 24 so as to open the sub-bypass circuit 23. 23 flows. Accordingly, the amount of hot water flowing through the auxiliary heat transfer tube 17 is reduced, and the heat transfer coefficient inside the auxiliary heat transfer tube 17 is reduced, so that the heat absorption amount of the auxiliary heat transfer tube 17 is reduced. Further, since the main operation control unit 22 reduces the amount of combustion by the amount of heat absorption of the sub heat transfer tube 17, the heat absorption amount of the sub heat transfer tube 17 is also reduced and finally heat balance is achieved. And although the amount of warm water flowing through the sub-heat transfer tube 17 is decreased despite the decrease in the heat absorption amount of the sub-heat transfer tube 17, the temperature of the sub-heat transfer tube 17 is increased, but the temperature flowing through the sub-bypass circuit 23 is reversed. Since it mixes with the hot water which has not risen, after all, the temperature rise of the warm water of the auxiliary heat transfer tube 17 is suppressed and approaches the required temperature.
[0028]
  By the way, in the first embodiment, after the sub-temperature suppression unit 25 controls the sub-opening / closing means 24 so as to open the passage of the sub-bypass circuit 23, the combustion amount of the combustion unit 15 falls below the reference value. A sub-temperature suppression release unit 32 that controls the sub-opening / closing means 24 is provided so as to close the passage of the bypass circuit 23 again.
[0029]
  After the sub opening / closing means 24 is controlled so that the sub temperature suppression unit 25 opens the passage of the sub bypass circuit 23, the required capacity of the main operation is reduced (for example, the amount of hot water is decreased, the target temperature is decreased, and the main operation is stopped). The main operation control unit 22 adjusts the combustion amount of the combustion unit 15 to be small so that the output of the main temperature detector 19 becomes a target value. When the combustion amount of the combustion unit 15 falls below the reference value, the auxiliary temperature suppression release unit 32 controls the auxiliary opening / closing means 24 so as to close the passage of the auxiliary bypass circuit 23 again. No longer flow. Accordingly, the amount of hot water flowing through the auxiliary heat transfer tube 17 increases, and the heat transfer coefficient inside the auxiliary heat transfer tube 17 increases, so that the amount of heat absorbed into the auxiliary heat transfer tube 17 increases. Furthermore, since the main operation control unit 22 increases the amount of combustion by the amount of heat absorption to the sub heat transfer tube 17, the heat absorption amount to the sub heat transfer tube 17 also increases, and the hot water in the sub heat transfer tube 17 reaches the required temperature. At the end, thermal equilibrium occurs.
[0030]
  The reference value at which the sub-temperature suppression release unit 32 operates is the fuel value of the combustion unit 15 obtained in advance by experiments.
The combustion amount (reference value) of the combustion section 15 that is lower than the warm water temperature of the auxiliary heat transfer tube 17 allowed from the relational expression between the amount of burning and the auxiliary temperature detector 20 is obtained. However, since the amount of hot water in the auxiliary heat transfer tube 17 cannot be obtained, the reference value must be set slightly lower in consideration of the safety factor. Even if the sub-temperature suppression canceling unit 32 operates when the output of the sub-temperature detector 20 becomes smaller than the target value, the effect does not change.
[0031]
  (Example 2)
  FIG. 2 is a configuration diagram of a heat source device according to a second embodiment of the present invention. The difference from the first embodiment is an upstream portion 34 of the auxiliary heat transfer tube 17 adjacent to the combustion portion 33, an outlet 35 on the most downstream side, and an outlet 37 of the downstream portion 36 of the auxiliary heat transfer tube 17 remote from the combustion portion 33. Are connected by a sub-bypass circuit 38, and a switching means 39 for switching the passage between the downstream portion 36 of the sub-heat transfer tube 17 and the sub-bypass circuit 38 is provided at the outlet 35. The switching means 39 is a three-way valve. Further, when the output of the sub-temperature detector 40 exceeds the reference value during the main-sub simultaneous operation, the sub-temperature suppression unit that controls the switching unit 39 to switch the passage from the downstream portion 36 of the sub-heat transfer tube to the sub-bypass circuit 38. 41 is provided. A heater 42 is provided at the thermal end. In addition, the thing of the same code | symbol as Example 1 has the same structure, and abbreviate | omits description.
[0032]
  The main / sub simultaneous operation will be described. When the currant is opened and water is passed through the main heat transfer pipe 16 and hot water is passed through the upstream and downstream portions 34 and 36 of the sub heat transfer pipe 17 by the water passing means 30, the combustion section 33 is combusted and the main temperature is increased. The main operation control unit 22 adjusts the combustion amount so that the output of the detector 19 becomes the target value. On the other hand, the combustion heat is mainly transmitted to the main heat transfer tube 16, but the remaining combustion heat is transferred to the upstream and downstream portions 34 and 36 of the sub heat transfer tube 17, but the hot water whose temperature has increased is circulated to the heater 42. To do. In particular, when the required capacity for main operation is large and the required capacity for sub-operation is small, the main operation control unit 22 greatly adjusts the combustion amount so that the output of the main temperature detector 19 becomes the target value. The warm water in the upstream / downstream portions 34 and 36 of the sub-heat transfer tube 17 that is snowing is considerably higher than the required temperature. At that time, when the output of the sub-temperature detector 40 exceeds the reference value, the sub-temperature suppression unit 41 controls the switching means 39 so as to open the sub-bypass circuit 38, so that all the hot water flows through the sub-bypass circuit 38. . Accordingly, the main operation control unit 22 reduces the amount of combustion by the amount that the downstream portion 36 of the sub heat transfer tube 17 does not absorb heat, so the heat absorption amount of the upstream portion 34 of the sub heat transfer tube 17 also decreases slightly. That is, since heat can be absorbed only at the upstream portion 34 of the sub heat transfer tube 17, the temperature of the hot water in the sub bypass circuit 38 is suppressed from rising and can approach the required temperature. In particular, as compared with the first embodiment, the passage is switched from the downstream portion 36 of the auxiliary heat transfer tube 17 to the auxiliary bypass circuit 38, so that the auxiliary operation capability can be reliably suppressed.
[0033]
  On the other hand, since the temperature of the outlet 35 that is a branch portion of the sub bypass circuit 38 is relatively higher than that of the first embodiment during the main single operation, the temperature difference between the sub bypass circuit 38 itself, that is, the outlet 35 and the outlet 37 is different. Since the temperature difference is small and the natural convection generated in the sub bypass circuit 38 is weak, the temperature rise of the switching means 39 is small. Therefore, the switching means 39 does not require a heat resistant material. In addition, when the auxiliary | assistant opening / closing means of Example 1 is used instead of the switching means 39, since there is a little warm water quantity to the downstream part 36 of an auxiliary | assistant heat exchanger tube, an effect becomes small.
[0034]
  Further, in the second embodiment, after the switching means 39 operates to switch the passage from the downstream portion 36 of the auxiliary heat transfer pipe 17 to the auxiliary bypass circuit 38, the combustion amount of the combustion portion 33 falls below the reference value. In this case, a sub-temperature suppression release unit 43 is provided for controlling the switching means 39 so that the passage is switched again from the sub-bypass circuit 38 to the downstream portion 36 of the sub-heat transfer tube 17.
[0035]
  That is, when the sub-temperature suppression unit 41 controls the switching means 39 so as to switch the passage of the sub-bypass circuit 38 from the downstream portion 36 of the sub-heat transfer tube 17, the main temperature detector The main operation control unit 22 adjusts the combustion amount of the combustion unit 33 to be small so that the output of 19 becomes the target value. And when the combustion amount of the combustion part 33 is less than a reference value, sub temperature suppression
Since the release portion 43 controls the switching means 39 so as to switch the passage from the sub bypass circuit 38 to the downstream portion 36 of the sub heat transfer tube 17, all the hot water flows through the downstream portion 36 of the sub heat transfer tube 17. Since the main operation control unit 22 increases the amount of combustion by the amount that the downstream portion 36 of the sub heat transfer tube 17 starts to absorb heat, the heat absorption amount of the upstream portion 34 of the sub heat transfer tube 17 also increases, and the sub heat transfer tube 17 The hot water in the upstream / downstream portions 34 and 36 can approach the required temperature.
[0036]
  The reference value at which the sub-temperature suppression canceling unit 43 operates is the hot water temperature allowed in the upstream portion 34 of the sub-heat transfer tube from the relational expression between the combustion amount of the combustion unit 33 and the sub-temperature detector 40 obtained in advance by experiments. The combustion amount (reference value) of the combustion part 33 to be described below is obtained. However, since the amount of hot water in the upstream / downstream portions 34 and 36 of the auxiliary heat transfer pipe 17 cannot be obtained, the reference value must be set slightly lower in consideration of the safety factor. Even if the sub-temperature suppression canceling unit 43 operates when the output of the sub-temperature detector 40 becomes smaller than the target value, the effect does not change.
[0037]
  (Example 3)
  FIG. 3 is a configuration diagram of a heat source device according to a third embodiment of the present invention. The difference from the first embodiment is that a switching means 46 for switching the passage between the sub heat transfer pipe 44 and the sub bypass circuit 45 is provided by a second sub opening / closing means 47 and a sub opening / closing means 48 provided on the inlet side of the sub heat transfer pipe 44. That is to make up. However, the second sub opening / closing means 47 is initially opened, and the sub opening / closing means 48 is closed. In addition, when it is requested to keep the bathtub 49 warm during the main operation, the water detecting means 50 operates, and the state detecting unit 51 that controls the switching means 46 so as to switch the passage from the sub heat transfer pipe 44 to the sub bypass circuit 45 is provided. Provided. In addition, the thing of the same code | symbol as Example 1 has the same structure, and abbreviate | omits description.
[0038]
  The case where the heat insulation of the bathtub 49 is requested | required during the main driving | operation is demonstrated. While the hot water in the bathtub 49 is passed by the water passing means 50, the switching means 46 is controlled so that the state detection unit 51 switches the passage from the sub heat transfer pipe 44 to the sub bypass circuit 45. Specifically, the switching means 46 opens the sub opening / closing means 48 and conversely closes the second sub opening / closing means 47. As a result, the hot water in the bathtub 49 flows along the temperature detector 21 by the water passing means 50 and then circulates again from the sub bypass circuit 45 to the bathtub 49. That is, since the hot water in the bathtub 49 does not pass through the auxiliary heat transfer tube 44, the temperature of the hot water in the bathtub 49 can be detected by the temperature detector 21 without increasing the temperature even in the main operation alone. The temperature of the hot water in the bathtub 49 may be detected by the auxiliary temperature detector 20. Further, when the hot water temperature of the bathtub is detected, in the first embodiment, the sub opening / closing means 24 is operated so as to open the sub bypass circuit 23, or in the second embodiment, the switching means 39 is connected to the sub heat transfer tube 17. When the operation is performed so as to switch the passage from the downstream portion 36 to the sub bypass circuit 38, the temperature can be detected without increasing the temperature as compared with the conventional example.
[0039]
  Next, when the hot water temperature of the bathtub 49 is low and reheating is required, the state detection unit 51 controls the switching means 46 so as to switch the passage from the sub bypass circuit 45 to the sub heat transfer pipe 44 again (simultaneous main and sub operations). ) When the output of the temperature detector 21 reaches the target value, the water flow means 50 is stopped.
[0040]
  Furthermore, if the switching means 46 is operated when the combustion section 15 is stopped and water passage is started by the water passage means 50, the temperature of the heat load can be lowered by heat radiation from the piping.
[0041]
  Example 4
  FIG. 4 is a configuration diagram of a heat source device according to a fourth embodiment of the present invention. The difference from the first embodiment is that the water passage means 30 is stopped when the output of the sub-temperature detector 52 exceeds the reference value, and then the water passage means 30 is turned off when the combustion amount of the combustion portion 53 falls below the reference value. This is the provision of a water flow control unit 54 for re-driving. In addition, the thing of the same code | symbol as Example 1 has the same structure, and abbreviate | omits description.
[0042]
  Next, a description will be given of a case where the main-sub simultaneous operation, in particular, the main operation required capacity is large and the sub-operation required capacity is small. The main operation control unit 22 is combusted so that the required main tapping temperature is reached.
Since the amount is adjusted to a large extent, the side hot water, which is now being used, becomes considerably higher than the required temperature. At that time, when the output of the sub-temperature detector 52 exceeds the reference value, the water flow control unit 54 stops the sub-operation by stopping the water flow means 30, so that hot hot water is transferred from the sub-heat transfer pipe 17 to the bathtub 31. There is no circulation to. Further, even when the heat load is a heater, the room temperature does not become too high and uncomfortable feeling does not occur. However, there is a side effect that it cannot be reheated or heated. Thereafter, when the required capacity of the main operation becomes small, the main operation control unit 22 adjusts the combustion amount of the combustion unit 53 so that the output of the main temperature detector 19 becomes the target value. And when the combustion amount of the combustion part 53 falls below a reference value, since the water flow control part 54 re-drives the water flow means 30, reheating and heating can be restarted. The reference value at which the water flow control unit 54 operates is a combustion that is equal to or lower than the hot water temperature of the auxiliary heat transfer tube 17 permitted from the relational expression between the combustion amount of the combustion unit 53 and the auxiliary temperature detector 52 obtained in advance through experiments. The combustion amount (reference value) of the portion 53 is obtained in advance.
[0043]
【The invention's effect】
  As described above, the present invention has the following advantageous effects.
[0044]
  (1) According to the first aspect of the present invention, since the sub-temperature suppression unit for controlling the sub-opening / closing means is provided so as to open the passage of the sub-bypass circuit when the output of the sub-temperature detector exceeds the reference value, By reducing the amount of hot water in the heat pipe, the amount of heat absorption becomes smaller, and the hot water can approach the required temperature.
[0045]
  (2) According to the second aspect of the present invention, since the auxiliary temperature raising part for controlling the auxiliary opening / closing means is provided so as to close the passage of the auxiliary bypass circuit again when the combustion amount of the combustion part falls below the reference value, the auxiliary transmission is provided. The amount of heat absorption increases by increasing the amount of hot water in the heat pipe, and the hot water can approach the required temperature.
[0046]
  (3) Since the invention of claim 3 is provided with a sub-bypass circuit and a switching means connecting the substantially middle part of the sub-heat transfer tube and the outlet side, heat cannot be absorbed in the downstream portion of the sub-heat transfer tube, and the hot water reaches the required temperature. Can approach. Moreover, since heat is absorbed only at the upstream portion of the auxiliary heat transfer tube, the amount of heat absorption can be set stably. Furthermore, the temperature of the switching means is small because the temperature of the hot water in the middle of the auxiliary heat transfer tube is relatively high during the main independent operation and the natural convection of the auxiliary bypass circuit is weak. Therefore, no heat resistant material is required for the switching means.
[0047]
  (4) According to the invention of claim 4, when the amount of combustion in the combustion section falls below a reference value, the sub-temperature suppression canceling section that controls the switching means to switch the passage again from the sub-bypass circuit to the downstream section of the sub-heat transfer pipe. Therefore, heat can be absorbed in the downstream portion of the auxiliary heat transfer tube, and the hot water can approach the required temperature.
[0048]
  (5) Since the invention according to claim 5 is provided with the state detection unit for controlling the auxiliary opening / closing means so as to switch the passage from the auxiliary heat transfer tube to the auxiliary bypass circuit, the temperature of the hot water does not rise even during the main independent operation. The temperature can be detected by the vessel. In addition, when the combustion section is stopped, the temperature at the thermal end can be lowered by heat radiation from the pipe.
[0049]
  (6) The invention of claim 6 stops the water flow means when the output of the sub temperature detector exceeds the reference value, and then starts the sub operation when the combustion amount in the combustion section falls below the reference value. Since the water control unit is provided, it is possible to easily and reliably prevent high-temperature hot water from circulating to the heat load without providing a bypass circuit.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a heat source device according to a first embodiment of the present invention.
FIG. 2 is a configuration diagram of a heat source device according to a second embodiment of the present invention.
FIG. 3 is a configuration diagram of a heat source device according to a third embodiment of the present invention.
FIG. 4 is a configuration diagram of a heat source device according to a fourth embodiment of the present invention.
FIG. 5 is a configuration diagram of a conventional heat source device.
[Explanation of symbols]
  15, 33, 53 Combustion section
  16 Main heat transfer tubes
  17, 34, 36, 44 Sub heat transfer tube
  18 Heat receiving fin
  19 Main temperature detector
  20, 40, 52 Sub temperature detector
  21 Temperature detector
  22 Main operation controller
  23, 38, 45 Sub-bypass circuit
  24 Sub-opening / closing means
  25, 41 Sub temperature suppression part
  32, 43 Sub temperature suppression release part
  39, 46 switching means
  30, 50
  51 State detector
  54 Water flow control unit

Claims (6)

A main heat transfer pipe disposed downstream of the combustion section, a sub heat transfer pipe circulating hot water to the heat terminal, a heat receiving fin penetrating and fixing to the main heat transfer pipe and the sub heat transfer pipe, and an outlet side of the main heat transfer pipe A main temperature detector provided; a sub-bypass circuit connecting the inlet side and the outlet side of the sub-heat transfer tube; and a sub-temperature detector provided downstream from the junction of the sub-bypass circuit and the sub-heat transfer tube; A sub-opening / closing means that normally closes and opens / closes the passage of the sub-bypass circuit; a main operation control unit that controls the combustion unit; and a sub-temperature suppression unit that controls the sub-opening / closing unit. When the operation is requested, the main operation control unit preferentially controls the combustion unit so that the output of the main temperature detector becomes a target value, and at that time, the output of the sub temperature detector sets the reference value. exceeding, so that the sub-temperature suppression unit opens a passage of the auxiliary bypass circuit A heat source unit for controlling the auxiliary switching means.   After the sub-opening / closing means operates and opens the passage of the sub-bypass circuit, the sub-opening / closing means for controlling the sub-opening / closing means to close the passage of the sub-bypass circuit again when the combustion amount in the combustion section falls below a reference value. The heat source device according to claim 1, further comprising a temperature riser. A main heat transfer pipe disposed downstream of the combustion section and a sub heat transfer pipe for circulating hot water to the heat terminal, a heat receiving fin penetrating and fixing to the main heat transfer pipe and the sub heat transfer pipe, and an outlet side of the main heat transfer pipe A main temperature detector provided; a sub-bypass circuit connecting a substantially middle portion of the sub-heat transfer tube and an outlet side; and a sub-temperature detector provided downstream from a junction of the sub- heat transfer tube and the sub bypass circuit; A switching means that is normally connected to a downstream portion of the heat transfer tube and switches a passage between the downstream portion of the sub heat transfer tube and the sub bypass circuit, a main operation control portion that controls the combustion portion, and the switching means. and a sub-temperature suppression unit that controls the output of the main operation control unit is preferentially the main temperature detector controls the combustion unit such that the target value when requested primary sub simultaneous operation, the If the output of the auxiliary temperature detector exceeds the reference value during the sub-temperature suppression unit A heat source unit for controlling the switching means to switch the path to the secondary bypass circuit from the downstream portion of the Fukuden heat pipe.   After the switching means operates and switches the passage from the downstream side of the auxiliary heat transfer tube to the auxiliary bypass circuit, when the combustion amount in the combustion section falls below a reference value, the auxiliary bypass circuit moves downstream of the auxiliary heat transfer tube. The heat source device according to claim 3, further comprising: a sub-temperature suppression release unit that controls the switching unit so as to switch the passage again.   A water passage means for passing hot water of the heat terminal to a temperature detector provided on the inlet side of the sub heat transfer tube, and a passage from the sub heat transfer tube to the sub bypass circuit when detection of the state of the heat load is requested during main operation The heat source apparatus according to claim 1, further comprising: a state detection unit that controls the switching unit so as to switch between the two. A main heat transfer pipe disposed downstream of the combustion section and a sub heat transfer pipe for circulating hot water to the heat terminal, a heat receiving fin penetrating and fixing to the main heat transfer pipe and the sub heat transfer pipe, and an outlet side of the main heat transfer pipe A main temperature detector provided, a sub-temperature detector provided on the outlet side of the sub-heat transfer tube, a water flow means for passing hot water through the sub-heat transfer tube, and a water flow control unit for controlling the water flow means And a main operation control unit that controls the combustion unit, and when the main and sub simultaneous operation is requested, the main operation control unit preferentially outputs the main temperature detector to a target value. When the output of the sub-temperature detector exceeds a reference value at the time of controlling the combustion section, the water flow control section stops the water flow means, and then the combustion amount of the combustion section falls below the reference value A heat source device in which the water flow control unit drives the water flow means.

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