JP2005337632A - Heat source device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat source device capable of quickly and stably performing heating/hot water supply in accordance with a use condition of heating operation and hot water supply. <P>SOLUTION: This hot water supply and heating device 1 comprises a burning means 10, a heating flow channel 15 capable of connecting with a specific heating radiator, a bypass flow channel 16 branched from the heating flow channel 15, and a hot water supply channel 17. Further a distribution flow rate adjusting part 18 is mounted on a branch part to the bypass flow channel 16 of the heating flow channel 15, and the distribution flow rate adjusting part 18 can distribute a ratio of a flow rate at a heating radiator side and that of a bypass flow channel 16 side within a specific range. The flow rate of a heat medium flowing in the bypass flow channel 16 is maximized when only the hot water supply is used, the flow rate of the heat medium flowing to the bypass flow channel 16 is adjusted within a range of more than a specific flow rate when only the heating is used, and the flow rate of the heat medium flowing in the bypass flow channel 16 is adjusted to achieve a calculated heat quantity when both of the hot water supply and heating are used. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a heat source device including a plurality of heated systems, such as a multifunction machine having both a hot water supply function and a heating function.

  2. Description of the Related Art Conventionally, there is used a hot water supply and heating device that is a heat source device capable of both hot water supply by heating water and heating by heating a heat medium such as an antifreeze liquid and radiating heat at a predetermined place through a pipe. Then, the heat source used for the heating flow path and the heat source used for the hot water supply flow path are used as one heat exchange can body, and the heat exchange heating of the two systems is also performed by one heat exchange can body. There is a hot water supply / heating device of so-called one can two water channels that can be used.

  A hot water supply and heating device with one heat exchange can is manufactured at a lower cost than a hot water supply and heating device with two cans and two water channels that can perform two systems of heat exchange heating with two heat exchange cans. can do.

As such a hot water heater / heater using one heat exchange can body, like the hot water heater / heater described in Patent Document 1 and the like, the temperature of the water in the first hot water channel is raised by heat exchange with the combustion exhaust gas. There is a warm water system that raises the temperature of the water in the second warm water channel by exchanging heat with the warm water in the first warm water channel.
JP 2003-21344 A

  However, in the conventional hot water supply and heating apparatus described in Patent Document 1 and the like, there are cases where hot water supply and heating according to demands cannot be performed depending on the timing of hot water supply or heating operation / stop. This is because when there is a demand for hot water supply, a large amount of heat is required in a short time, but heating requires a small amount of heat for a long time compared to the case of hot water supply. This is because the necessary amount of heat cannot be switched smoothly according to the operating conditions.

  Then, this invention makes it a subject to provide the heat source device which can supply required heat amount to the heating side and the hot water supply side quickly and stably according to the utilization condition of heating operation or hot water supply.

In order to achieve the above-mentioned object, the invention according to claim 1 comprises a combustion means, a heating flow path capable of forming a circulation path by connecting a predetermined heating radiator, and the heating flow. There is a bypass channel that branches from the road and bypasses the heating radiator and joins the heating channel, and a hot water supply channel that introduces water through the water inlet, heats the water through the hot water supply, and discharges the water to the outside. The heating channel is provided with a first heat exchanger and a circulation pump, and the first heat exchanger heats the heat medium in the heating channel with the combustion gas generated in the combustion means, and the circulation The pump circulates the heat medium in the heating channel, and the bypass channel can heat the water introduced from the water inlet of the hot water channel using the heat medium circulating in the heating channel. A second heat exchanger is provided, bypassing the heating channel A distribution flow rate adjusting means capable of distributing a ratio between a flow rate of the heat medium flowing in the heating radiator and a flow rate of the heat medium flowing in the bypass flow path is provided at the branch portion to the path, and A heating operation detecting means for detecting a request for operation of the heating radiator, a water inlet detecting means for detecting that the flow rate of the hot water supply passage is equal to or higher than a predetermined flow rate, and a temperature of the water discharged from the hot water supply portion for a predetermined value. Hot water supply calorie calculation means for calculating the amount of heat necessary for adjusting to the hot water supply temperature, and a control means, the control means of the detection result of the heating operation detection means, the detection result of the incoming water detection means and the hot water supply heat amount calculation means The distribution flow rate adjusting means is controlled based on the calculation result, and the control means is controlled so as to satisfy all the following conditions 1) to 3).
1) A heat medium that flows in the bypass channel when it is detected by the incoming water detection means that the flow rate of the hot water supply channel is equal to or higher than a predetermined flow rate and the heating operation detection unit does not detect a request for operation of the heating radiator. The distribution flow rate adjusting means is adjusted so that the flow rate of the flow rate becomes maximum.
2) When the water flow detection means does not detect that the flow rate of the hot water supply channel is equal to or higher than the predetermined flow rate and the heating operation detection means detects a request for operation of the heating radiator, the heat flowing through the bypass flow channel The distribution flow rate adjusting means is adjusted in a range where the flow rate of the medium is equal to or higher than a certain flow rate.
3) When the flow rate of the hot water supply passage is detected to be equal to or higher than the predetermined flow rate by the incoming water detection means, and the heating operation detection means detects the request for the operation of the heating radiator, the heat medium flowing through the bypass flow passage The distribution flow rate adjusting means is adjusted so that the heat quantity possessed by becomes the heat quantity calculated by the heat quantity calculating means.

The heat source device according to the first aspect of the invention uses the distribution flow rate adjusting means at the branch portion between the heating radiator and the bypass flow path, and changes the flow rate ratio of the heat medium flowing to the bypass flow path side according to the operating conditions. Yes, 1) When it is detected only that the flow rate of the hot water supply channel is equal to or higher than the predetermined flow rate, the flow rate of the heat medium flowing through the bypass channel is maximized, and 2) the heating radiator is operated. When only the demand is detected, the flow rate of the heat medium flowing through the bypass flow path is adjusted in a range where the flow rate is equal to or higher than a certain flow rate. 3) The flow rate of the hot water supply flow path is equal to or higher than a predetermined flow rate, and heating and heat dissipation When the demand for the operation of the storage device is detected, the distribution flow rate adjusting means is adjusted so that the flow rate flowing through the bypass flow passage becomes the heat amount calculated by the heat amount calculation means. Use of driving and hot water demand Depending on the situation, it is possible to quickly and stably heating and hot water supply.
That is, when only hot water is used, the flow rate of the heat medium in the bypass channel is maximized, and even when only heating operation is performed, a certain amount of heat medium flows through the bypass channel. Sometimes it is possible to respond immediately.

  In the invention according to claim 2, when the request for operation of the heating radiator is detected by the heating operation detection means, when the water flow detection means detects that the flow rate of the hot water supply channel is equal to or higher than a predetermined flow rate, Adjust the distribution flow rate adjusting means so that the flow rate of the heat medium flowing in the bypass flow path becomes the maximum, and then gradually decrease the flow rate of the heat medium flowing in the bypass flow path to increase the flow rate flowing to the heating radiator. The heat source apparatus according to claim 1, wherein the distribution flow rate adjusting means is adjusted.

  According to the second aspect of the present invention, when the request for operation of the heating radiator is detected, when the flow rate of the hot water supply channel is detected to be equal to or higher than the predetermined flow rate, the heat medium flowing in the bypass channel Since the distribution flow rate adjusting means is adjusted so that the flow rate of the air reaches the maximum, it is possible to quickly supply hot water, and then gradually reduce the flow rate of the heat medium flowing through the bypass flow path to the heating radiator. Since the control is performed so as to increase the flowing flow rate, the hot water supply does not become unstable.

  According to a third aspect of the present invention, the hot water supply passage is provided with a bypass portion that connects the incoming water portion and the hot water supply portion so as to bypass the second heat exchanger, and the bypass valve is in a normally open state. The bypass valve is closed after a predetermined time if it is detected that the flow rate of the hot water supply channel is equal to or higher than a predetermined flow rate while detecting the request for operation of the heating radiator. The heat source device according to claim 1, wherein the heat source device is a heat source device.

  According to the third aspect of the present invention, the hot water supply passage is provided with a bypass portion having a bypass valve that connects the incoming water portion and the hot water supply portion so as to bypass the second heat exchanger. When detecting that the flow rate of the hot water supply channel is equal to or higher than the predetermined flow rate, the bypass valve closes after a predetermined time. The water in the hot water supply passage that has flowed and became hot in the second heat exchanger during the heating operation is mixed with the water passing through the bypass section without being discharged as it is during the hot water supply, so that the hot water remains as it is. There is no risk of getting out.

  According to the hot water supply and heating device of the present invention, it is possible to quickly and stably supply a necessary amount of heat to the heating side and the hot water supply side according to the heating operation and the use situation of the hot water supply.

  Hereinafter, specific examples of the present invention will be described. FIG. 1 is an operation principle diagram of a hot water supply / room heating device according to a first embodiment of the present invention. FIG. 2 is an operation principle diagram of the hot water supply / room heating device according to the second embodiment of the present invention. FIG. 3 is an operation principle diagram of the hot water supply / room heating device according to the third embodiment of the present invention.

  FIG. 1 shows a hot water supply / room heating device (heat source device) 1 according to a first embodiment of the present invention. And in the hot water heater 1, the combustion means 10, the first heat exchanger 11, the second heat exchanger 12, the circulation pump 13, the heating flow path 15, the bypass flow path 16, the hot water supply flow path 17, and the distribution flow rate adjustment unit. 18 is provided.

The combustion means 10 is capable of generating combustion gas by burning fuel. And the heat medium in the heating flow path 15 can be heated by the 1st heat exchanger 11 with the heat | fever of the combustion gas which generate | occur | produced in the combustion means 10 so that it may mention later.
The combustion means 10 is provided with a fuel supply unit 10a, a combustion fan 10b, and a combustion burner 10c. The fuel supplied from the fuel supply unit 10a is burned by the combustion burner 10c to generate combustion gas.

The heating flow path 15 can be connected to a heating radiator (not shown) such as a floor heating device or a fan convector. When this heating radiator is connected to the heating flow path 15, a circulation path is provided. Can be formed. The heating flow path 15 is provided with a heating forward portion 15a and a heating return portion 15b. The heating radiator is provided with a flow path for heat dissipation, and a heating forward portion 15a and a heating return portion 15b are connected to both ends of the flow path for heat dissipation.
And the circulation path formed by the heating flow path 15 and the said heating radiator, and the bypass flow path 16 mentioned later are filled with the heat medium. As the heat medium, a liquid such as an antifreeze liquid obtained by adding ethylene glycol or the like to water is used.

  The heating flow path 15 is provided with a first heat exchanger 11 and a circulation pump 13. The first heat exchanger 11 and the circulation pump 13 are arranged in a circulation path formed by the heating flow path 15 and the heating radiator. Then, by operating the circulation pump 13, the heat medium heated by the first heat exchanger 11 can be circulated in the heating flow path 15.

As shown in FIG. 1, the bypass flow path 16 is a pipe that branches from the heating flow path 15 and connects to the heating flow path 15 again, and bypasses the heating radiator and joins the heating flow path. In addition, a distribution flow rate adjusting unit 18 is provided at a branching portion of the heating flow channel 15 with the bypass flow channel 16. Further, the bypass flow path 16 forms a circulation path together with a part of the heating flow path 15 including the first heat exchanger 11 and the circulation pump 13, and this circulation path is connected to the predetermined heating radiator and the heating flow described above. The circulation path formed by the path 15 is different.
The second heat exchanger 12 is disposed in the bypass flow path 16. The second heat exchanger 12 is called a so-called liquid-liquid heat exchanger, and can transfer the heat of the heat medium in the bypass channel 16 to the water in the hot water supply channel 17. Water can be heated.

  The circulation path formed by the heating flow path 15 and the heating radiator, and the circulation path formed by the bypass flow path 16 and a part of the heating flow path 15 include the first heat exchanger 11 and the circulation pump 13. It is duplicated in the including part. Therefore, when the circulation pump 13 is operated, the heat medium circulates in both circulation paths. In addition, since the distribution flow rate adjusting unit 18 is provided at the branching portion of the heating flow channel 15 and the bypass flow channel 16, by adjusting the distribution flow rate adjusting unit 18 as will be described later, The flow rate ratio can be changed.

The specific flow of the heat medium is as follows.
When the circulation pump 13 is operated, the heat medium output from the circulation pump 13 reaches the distribution flow rate adjusting unit 18 from the first heat exchanger 11 and is divided into the heating radiator side and the bypass flow channel 16 side. Further, the heating radiator side reaches the heating radiator from the heating forward portion 15a, returns to the circulation pump 13 from the heating return portion 15b, and the bypass passage 16 side starts from the second heat exchanger 12 of the bypass passage 16 to the circulation pump 13. Return to.

  The distribution flow rate adjusting unit 18 can change the ratio of the flow rate of the heat medium flowing to the heating radiator side and the flow rate of the heat medium flowing to the bypass flow path 16 side to a predetermined range by adjusting the opening degree. it can. Therefore, the ratio of the amount of heat supplied to the heating radiator and bypass channel 16 can be freely changed, and the ratio of the amount of heat radiated by the heating radiator and the amount of heat exchanged by the second heat exchanger 12 can be changed. it can.

  The range in which the flow rate ratio of the distribution flow rate adjusting unit 18 can be changed is arbitrary. In the distribution flow rate adjusting unit 18 of the hot water supply / room heating device 1 of the present embodiment, even when the flow rate on the bypass flow channel 16 side is minimized, the heat medium having a constant flow rate flows on the bypass flow channel 16 side.

  The hot water supply channel 17 is a conduit connecting the water inlet 17a and the hot water supplier 17b, and can introduce water through the water inlet 17a and discharge the water to the outside through the hot water supplier 17b. The second heat exchanger 12 is disposed in the hot water supply channel 17. And by the 2nd heat exchanger 12, the water introduced from the water intake part 17a can be heated, and this heated water can be discharged from the hot water supply part 17b. The water intake section 17a is connected to a water supply or the like, and the hot water supply section 17b is connected to a hot water tap 17c provided at a desired necessary place.

Moreover, the hot water heater 1 of this embodiment is provided with the detection means 30 which detects the temperature and flow volume of a heat medium or water.
Specifically, the temperature detection unit 31 is provided between the first heat exchanger 11 and the distribution flow rate adjusting unit 18 in the heating flow path 15, and the heating output is provided between the distribution flow rate adjusting unit 18 and the heating return unit 15a. A return temperature detection unit 33 is provided between the heating return unit 15 b and the circulation pump 13.
An incoming water temperature detector 35 and an incoming water amount detector 38 are provided between the incoming water portion 17 a of the hot water supply channel 17 and the second heat exchanger 12, and a heated temperature detector 36 is provided downstream of the second heat exchanger 12. It has been.
And the incoming water amount detection part 38 can detect whether the water more than predetermined flow is flowing through the hot water supply flow path 17, can detect the request | requirement of hot water supply, and becomes an incoming water detection means.

  A heating expansion tank 20 is provided between the heating return unit 15b and the circulation pump 13 to absorb the increase in volume due to the temperature rise of the heat medium and prevent the heating passage 15 from being damaged. Yes.

  In addition, the hot water heater 1 is provided with a control unit (not shown). The operation of the combustion means 10 and its combustion amount, the flow rate of the circulation pump 13 and the distribution flow rate adjustment are made based on external inputs (heating operation input, hot water supply temperature set values) and the detection result of the detection means 30 described above. The flow rate ratio of the part 18 can be changed.

Next, a method for heating and hot water supply using the hot water supply / room heating apparatus 1 will be described with reference to FIG.
First, when heating and hot water supply are not performed, the combustion means 10 and the circulation pump 13 are not operated.

  When a heating operation switch (heating operation detecting means) is turned on to perform heating from this state, an input signal is output to a control unit (not shown). When an input signal for heating operation is received by the control unit (S1), the distribution flow rate adjustment unit 18 has a distribution ratio such that the flow rate on the bypass channel 16 side is the minimum and the flow rate on the heating radiator side is the maximum ( S2). Further, the circulation pump 13 is operated, and the heat medium is circulated by the operation of the circulation pump 13 (S3).

  In the distribution flow rate adjusting unit 18, even when the flow rate on the bypass flow channel 16 side is minimized, a heat medium having a constant flow rate flows on the bypass flow channel 16 side. However, since hot water is not supplied, the amount of heat exchange in the second heat exchanger 12 is small.

  After confirming that the heat medium in the first heat exchanger 11 flows, the control means activates the combustion means 10 and controls the combustion amount of the combustion means 10 so as to reach the preset temperature for heating. Heating control is performed by changing the amount of heat, and heating operation is performed. In this heating operation, the temperature of the heating forward temperature detection unit 32 is controlled so as to be in a temperature range based on the heating set temperature. Specifically, when the temperature of the heating-out temperature detection unit 32 is equal to or higher than a predetermined upper limit temperature, the operation of the combustion means 10 is stopped, and thereafter, when the temperature is again lower than the lower limit temperature, The combustion means 10 is activated again.

  Moreover, heating can be performed by radiating the heat of the heat medium with a heating radiator.

  When the stop of the heating operation is input without using hot water supply from the state of heating, the combustion means 10 and the circulation pump 13 are stopped. In FIG. 4, the process proceeds from S4 to S16 via S1 and S8. In addition, after the combustion means 10 stops, the circulation pump 13 can be operated for a certain period of time to prevent overheating of the first heat exchanger 11 and the like.

Next, a case where hot water is supplied will be described.
When the user opens the hot-water tap 17c and the water flows into the hot-water supply channel 17 from a state where neither heating nor hot-water supply is performed, the incoming water amount detection unit 38 detects the flow rate. The user inputs the required hot water temperature (required hot water temperature).

  Then, when the incoming water amount detection unit 38 detects a predetermined flow rate, the distribution flow rate adjustment unit 18 is adjusted under the control of a control unit (not shown). In FIG. 4, the process proceeds from S1 to S9 via S8. The distribution flow rate adjusting unit 18 is adjusted to a distribution ratio such that the flow rate on the bypass flow channel 16 side is the maximum and the flow rate on the heating radiator side is the minimum.

The circulation pump 13 is operated, and the circulation of the circulation pump 13 causes the heat medium to circulate. When it is confirmed by the operation of the circulation pump 13 that the heat medium in the first heat exchanger 11 flows, the combustion means 10 is operated (S10). When the circulation pump 13 and the combustion means 10 are operated, the heat of the combustion gas generated in the combustion means 10 is transferred to the heat medium via the first heat exchanger 11 to heat the heat medium. The heat of the heat medium heated by the heat exchanger 11 and having its temperature raised heats the water in the hot water supply channel 17 by the second heat exchanger 12.
Then, a control unit (not shown) performs heating control by controlling the combustion amount of the combustion means 10 and changing the amount of generated heat so that the temperature of the tapping temperature detection unit 37 becomes the hot water supply temperature input from the outside. I do.

  The combustion control of the combustion means 10 at this time is performed by setting the amount of heat required for the hot water supply flow path 17 using the detection results of the incoming water temperature detection unit 35, the heating temperature detection unit 36, the hot water temperature detection unit 37, the incoming water amount detection unit 38 and the like. The required amount of heat is calculated by the hot water supply heat amount calculation means to be calculated, and the combustion control of the combustion means 10 can be performed based on the detection results of the temperature detection unit 31 and the return temperature detection unit 33.

  When the user closes the hot-water tap 17c and stops the incoming water from the incoming water portion 17a of the hot-water supply channel 17, the operation of the combustion means 10 stops when the flow rate of the hot-water supply channel 17 decreases below a certain amount. The operation of the circulation pump 13 is also stopped. In FIG. 4, the process proceeds from S8 to S16.

Further, when the heating operation is performed during the hot water supply operation, both the heating operation and the hot water supply operation are performed by controlling the combustion by the combustion means 10 and the flow rate ratio performed by the distribution flow rate adjusting unit 18. I do. In FIG. 4, the process proceeds from S11 to S12 and S13.
In this case, unlike the case where the heating operation is performed from the case where the hot water supply operation is not performed, the above-described control is performed with priority given to stabilizing the amount of heat supplied to the bypass channel 16 side. This is because for the heating operation, it is necessary that the temperature of the heating forward temperature detection unit 32 be in a temperature range based on the heating set temperature, but immediately after the input of the heating operation, This is because the hot water supply operation tends to become unstable if the flow rate ratio performed by the distribution flow rate adjusting unit 18 is changed.

  Specifically, when the input of the heating operation is detected, the amount of heat generated by the combustion means 10 is increased by increasing the amount of combustion of the combustion means 10. When the amount of heat generated by the combustion means 10 increases, the temperature of the heat medium rises. As the temperature rises, the opening degree of the distribution flow rate adjusting unit 18 is gradually changed and the heat medium flows to the heating radiator side. Increase the flow rate. The opening degree of the distribution flow rate adjusting unit 18 is changed so that the amount of heat supplied to the bypass channel 16 side maintains the necessary amount of heat calculated by the hot water supply heat amount calculating means.

  Further, when the heating operation is performed during the hot water supply operation and the temperature of the heat medium in the heating flow path 15 is higher than the heating set temperature, the flow rate ratio by the distribution flow rate adjusting unit 18 is set to the bypass flow path 16. It is also possible to control the combustion means 10 so as to reduce the temperature of the heat medium in the heating flow path 15 to the heating set temperature by setting the side to the maximum flow rate.

  On the contrary, when the hot water supply operation is performed during the heating operation, the operation contents are different from the case where the hot water supply operation is performed from the case where the heating operation is not performed. In FIG. 4, the process proceeds from S4 to S5, S6, and S7. In this case, both the heating operation and the hot water supply operation are performed by controlling the combustion by the combustion means 10 and controlling the flow rate ratio performed by the distribution flow rate adjusting unit 18.

Specifically, during the heating operation, when the incoming water amount detection unit 38 detects a flow rate of the hot water supply channel 17 that exceeds a certain level by opening the hot water tap 17c, the distribution flow rate adjustment unit 18 is temporarily connected to the bypass channel 16 once. The opening on the side is increased (S5). Then, the amount of heat for hot water supply is immediately supplied to the second heat exchanger 12 in the bypass passage 16. This calorie | heat amount can be performed based on the value computed by the above-mentioned hot water supply calorie | heat amount calculating means.
Further, even during the heating operation, a certain amount of heat medium flows through the bypass flow path 16, and the water staying in the second heat exchanger 12 is at a high temperature, so when the hot water tap 17 c is opened. Hot water can be discharged as soon as the remaining water is pushed out. Further, since the temperature of the heat medium in the bypass channel 16 is high, the water in the hot water supply channel 17 can be immediately heated by the heat of the heat medium in the second heat exchanger 12. In addition, although the flow rate of the heat medium to the heating radiator side is reduced and the supply of the heat amount is temporarily reduced, this is a temporary phenomenon and the influence is small.

Then, similarly to when the heating operation is performed during the hot water supply operation, the amount of heat generated by the combustion means 10 is increased (S6). Then, the amount of heat generated by the combustion means 10 increases, and the amount of heat that can be transferred to the heating medium and used for heating or hot water supply increases. Thereafter, the opening degree of the distribution flow rate adjusting unit 18 is changed to increase the flow rate of the heat medium flowing to the heating radiator side (S7).
The change of the opening degree of the distribution flow rate adjusting unit 18 may be made to gradually change while maintaining the amount of heat supplied to the bypass flow path 16 side to the required amount of heat calculated by the hot water supply heat amount calculating means. Alternatively, the opening degree of the distribution flow rate adjusting unit 18 may be started to change after a predetermined time has elapsed after the incoming water amount detecting unit 38 detects a flow rate above a certain level.

  Thus, the amount of the heat medium flowing to the heating radiator side increases, and the amount of heat radiated by the heating radiator and the amount of heat supplied to the heating radiator side are balanced. And like the above-mentioned content, control is performed by changing the amount of combustion of the combustion means 10 so that it may become between predetermined upper limit temperature and lower limit temperature.

  In the hot water supply / room heating device 1 of the present embodiment, the heating medium flows to the bypass flow channel 16 side even when heating is used. Therefore, when hot water is supplied during use of heating, the water in the hot water supply flow channel 17 is supplied. Can be heated immediately. In addition, when hot water is supplied, regardless of whether heating is used or not, the opening degree of the distribution flow rate adjusting unit 18 is changed to increase the flow rate of the heat medium to the bypass flow path side. It can be done quickly.

Moreover, you may make it control the combustion of the combustion means 10 so that the temperature of the temperature detection part 31 may become the value calculated by a calculation.
For example, the target temperature of the temperature detection unit 31 is T, the detection flow rate flowing through the bypass passage 16 (the flow rate of the circulation pump 13 multiplied by the ratio of the distribution flow rate adjustment unit 18) is Q1, and the detection temperature of the incoming water temperature detection unit 35 The target temperature T of the temperature detector 31 can also be calculated by a predetermined calculation, where T2i is the required hot water input temperature input by the user, T2o, and the detected flow rate of the incoming water amount detector 38 is Q2.
Further, the target temperature T may be corrected according to other values.

And when using the hot-water supply heating apparatus 1, the combustion means 10 is controlled so that the detection temperature of the temperature detection part 31 becomes this target temperature T. FIG.
Thus, since the combustion means 10 is controlled so that the temperature detection part 31 becomes the target temperature T, rapid hot water supply heating can be performed.

Moreover, the bypass part 50 can be provided in the hot-water supply flow path 17 like the hot-water supply heater 2 in the 2nd Embodiment of this invention shown by FIG. And this bypass part 50 branches between the water intake part 17a and the 2nd heat exchanger 12, and merges again between the 2nd heat exchanger 12 and the hot water supply part 17b, and is 2nd heat exchange The water intake part 17a and the hot water supply part 17b are connected so that the water heater 12 may be bypassed.
Therefore, as shown in FIG. 2, the flow of water between the incoming water portion 17 a and the hot water supply portion 17 b passes through the second heat exchanger 12 and the second heat exchanger through the bypass portion 50. The flow paths that do not pass through 12 are formed in parallel. In addition, about the other structure of the hot water supply and heating apparatus 2, it is the same as that of the above-mentioned hot water supply and heating apparatus 1.

  A bypass valve 51 is provided in the bypass unit 50 of the hot water supply / room heating device 2. When the bypass valve 51 is opened, water can flow through the bypass portion 50, and when it is closed, water does not flow. The bypass valve 51 is normally open and is closed when a predetermined condition is satisfied. When the hot water tap 17c connected to the hot water supply part 17b is opened in a state where the bypass valve 51 is opened and the bypass part 50 is opened, any flow on the second heat exchanger 12 side or the bypass part 50 side is selected. The road also flows. Therefore, in a state where the bypass valve 51 is open, a part of the water introduced from the water inlet 17a passes through the second heat exchanger 12.

In the hot water supply / room heating device 2, the bypass valve 51 is closed after a predetermined time (delay time) when hot water supply is started. After the start of hot water supply, the delay time during which the bypass valve 51 is open may be a preset time, or may be changed to become longer as the required hot water discharge temperature T2o is lower. Further, the delay time can be changed so as to become longer according to the length of the heating use time.
Further, when the heating stop time is longer than a certain time, this delay time can be omitted. Furthermore, the delay time can be determined by the relationship between the heating set temperature and the required hot water temperature T2o. Further, by using values such as the detected temperature and the set temperature, a delay time table in which the delay time can be referred to based on these values can be created, and the delay time can be changed by referring to this table. Furthermore, an arithmetic expression for calculating the delay time using values such as the detected temperature and the set temperature can also be used.

  And when the water in the 2nd heat exchanger 12 is heated too much, at the time of the start of hot water supply, there is a possibility that hot water may be discharged from hot water tap 17c, but as mentioned above, Since the bypass valve 51 is open only for the delay time and a part of the water passes through the bypass unit 50, there is no possibility that hot water is discharged from the hot water tap 17c. In particular, when heating is used, a part of the heat medium heated by the first heat exchanger 11 passes through the second heat exchanger 12, so even when no hot water is used, the second heat exchanger 12. The water remaining inside is gradually heated. Therefore, when hot water is supplied during the heating operation, there is a high risk of hot hot water, but during the delay time, water passing through the bypass unit 50 is mixed and discharged to lower the temperature, so that high temperature hot water is not easily discharged.

  Moreover, the mixing valve 55 can also be provided in the junction part with the bypass part 50 of the hot-water supply flow path 17 like the hot-water supply heating apparatus 3 in the 3rd Embodiment of this invention shown by FIG. And the mixing valve 55 can change into a predetermined | prescribed ratio the flow volume which flows into the 2nd heat exchanger 12 side of the hot water supply flow path 17, and the flow volume which flows into the bypass part 50 side. Accordingly, the mixing valve 55 is adjusted based on the detection temperature of the incoming water temperature detection unit 35, the detection temperature of the heating temperature detection unit 36, etc. The required temperature can be set.

  In the hot water heater 2 and the hot water heater 3, the hot water temperature detection unit 37 is provided between the bypass unit 50 and the hot water supply unit 17 b, and the combustion control of the combustion means 10 is performed based on the temperature detection result of the hot water temperature detection unit 37. It can also be done.

  The circulation pump 13 may be a pump that can fix the flow rate, or a pump that can change the flow rate. In the case where a pump that can change the flow rate of the circulation pump 13 is used, the relationship between the amount of heat transferred by the heating radiator and the second heat exchanger 12 and the temperature of the heat medium can be freely selected. And although it does not want to raise the temperature (temperature detected by the temperature detection part 31) of the heat medium immediately after heating with the 1st heat exchanger 11, much heat amount is used for a heating radiator or the 2nd heat exchanger 12. Can be supplied by increasing the flow rate of the circulation pump 13. Moreover, when it is not desired to lower the temperature of the heat medium immediately after being heated by the first heat exchanger 11, the flow rate of the circulation pump 13 is used when reducing the amount of heat supplied to the heating radiator or the second heat exchanger 12. This can be done by reducing

  In addition, when only hot water is supplied, the second heat exchanger is adjusted so as to satisfy the hot water supply conditions (incoming water detection temperature T2i, outgoing hot water required temperature T2o, detected flow rate Q2) by adjusting the opening of the distribution flow rate adjusting unit 18. The amount of heat to 12 can also be supplied.

Based on the heat exchange characteristics of the second heat exchanger 12, the hot water supply conditions, the temperature and flow rate of the bypass channel 16, and the like, the above-described control can be calculated in advance and controlled based on it.
In addition, the combustion means 10 can be controlled so that the temperature of the heat medium immediately after being heated by the first heat exchanger 11 matches the required heating temperature.

It is an operation principle figure of the hot-water supply heating apparatus in a 1st embodiment of the present invention. It is an operation | movement principle figure of the hot-water supply heating apparatus in the 2nd Embodiment of this invention. It is an operation | movement principle figure of the hot-water supply heating apparatus in the 3rd Embodiment of this invention. It is a flowchart which shows the action | operation of the hot-water supply heating apparatus in the 1st Embodiment of this invention.

Explanation of symbols

1, 2, 3 Hot water heater / heater (heat source device)
DESCRIPTION OF SYMBOLS 10 Combustion means 11 1st heat exchanger 12 2nd heat exchanger 13 Circulation pump 15 Heating flow path 16 Bypass flow path 17 Hot water supply flow path 17a Incoming water part 17b Hot water supply part 18 Distribution flow volume adjustment part

Claims (3)

A heating passage capable of forming a circulation path by connecting a combustion means and a predetermined heating radiator, and a bypass branched from the heating passage and bypassing the heating radiator and joining the heating passage A flow path and a hot water supply path for introducing water through the water inlet, heating the water through the hot water supply section and discharging the hot water to the outside,
The heating flow path is provided with a first heat exchanger and a circulation pump, the first heat exchanger heats the heat medium in the heating flow path with combustion gas generated in the combustion means, and the circulation pump It circulates the heat medium in the heating channel,
The bypass channel is provided with a second heat exchanger capable of heating the water introduced from the water inlet of the hot water channel using a heat medium circulating in the heating channel,
A distribution flow rate adjusting means capable of distributing a ratio between the flow rate of the heat medium flowing through the heating radiator and the flow rate of the heat medium flowing through the bypass flow channel at a branching portion of the heating flow channel to the bypass flow channel. Furthermore, a heating operation detecting means for detecting a request for operation of the heating radiator, a water inlet detecting means for detecting that the flow rate of the hot water supply channel is equal to or higher than a predetermined flow rate, and hot water is discharged from the hot water supply unit. Hot water supply calorie calculating means for calculating the amount of heat necessary for adjusting the temperature of water to a predetermined hot water supply temperature, and a control means, the control means detecting results of the heating operation detection means, detection results of the incoming water detection means And the distribution flow rate adjusting means based on the calculation result of the hot water supply heat quantity calculating means, wherein the control means is controlled to satisfy all the following conditions 1) to 3). Heat source device.
1) A heat medium that flows in the bypass channel when it is detected by the incoming water detection means that the flow rate of the hot water supply channel is equal to or higher than a predetermined flow rate and the heating operation detection unit does not detect a request for operation of the heating radiator. The distribution flow rate adjusting means is adjusted so that the flow rate of the flow rate becomes maximum.
2) When the water flow detection means does not detect that the flow rate of the hot water supply channel is equal to or higher than the predetermined flow rate and the heating operation detection means detects a request for operation of the heating radiator, the heat flowing through the bypass flow channel The distribution flow rate adjusting means is adjusted in a range where the flow rate of the medium is equal to or higher than a certain flow rate.
3) When the flow rate of the hot water supply passage is detected to be equal to or higher than the predetermined flow rate by the incoming water detection means, and the heating operation detection means detects the request for the operation of the heating radiator, the heat medium flowing through the bypass flow passage The distribution flow rate adjusting means is adjusted so that the heat quantity possessed by becomes the heat quantity calculated by the heat quantity calculating means.   When the heating operation detector detects a request for the operation of the heating radiator, the flow rate of the heat medium flowing in the bypass channel is detected when the incoming water detection unit detects that the flow rate of the hot water supply channel is equal to or higher than a predetermined flow rate. Adjust the distribution flow rate adjustment means so that the flow rate of the heat medium flowing through the bypass passage gradually decreases and increase the flow rate flowing to the heating radiator. The heat source device according to claim 1.   The hot water supply passage is provided with a bypass portion that connects the water inlet portion and the hot water supply portion so as to bypass the second heat exchanger, and the bypass portion includes a bypass valve that is normally open, and the bypass valve is configured to dissipate heat. 3. While detecting a request for operation of the water heater, when it is detected that the flow rate of the hot water supply channel is equal to or higher than a predetermined flow rate, the hot water supply channel is closed after a predetermined time. The heat source device described.

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