JP2014163590A - Hot-water supply/heating system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hot-water supply/heating system preventing the temperature of hot-water supplied from a hot-water tap from coming into lower than a target hot-water supply temperature in simultaneous operation of hot-water supply and heating.SOLUTION: A hot-water supply heating system 1a includes a hot-water flow rate change valve 44 changing the flow rate of hot-water passing through a heating pipe 46, and a priority control unit 53a performing hot-water supply priority control in which the flow rate of hot-water passing through the heating pipe 46 is reduced by the hot-water flow rate change valve 44 when the total heat quantity of a heat quantity consumed in heating operation and a heat quantity consumed in hot-water supply operation is equal to or more than a maximum heat quantity applied by a heat source machine 10 in simultaneous operation of hot-water supply and heating.

Description

  The present invention relates to a hot water supply and heating system that performs hot water supply and heating using hot water generated by heating by a heat source device.

  Conventionally, a hot water supply that is connected to a water supply pipe and a hot water supply pipe and that heats the water supplied from the water supply pipe and heats the water supplied to the hot water supply pipe by the hot water discharged from the heat source machine to the hot water supply pipe. There has been proposed a hot water supply and heating system that performs operation and a hot water supply operation for supplying hot water to a hot water tap connected to the downstream end of the hot water supply pipe (see, for example, Patent Document 1).

  In the hot water supply and heating system described in Patent Document 1, a heating circulation path (hot water supply circulation circuit 2) branched from a hot water supply pipe (water supply path 3) and communicated with a water supply pipe (water supply path 1), and a heating circulation path A bypass pipe (bypass passage 4) that bypasses the heat source machine (heat exchanger 23 for hot water supply) and communicates the hot water supply pipe with the water supply pipe, and a pump that circulates hot water in the heating circulation path (circulation pump) 7) and a bypass control valve (9) for changing the opening degree of the bypass pipe.

  When the hot water supply operation is performed independently, the heating amount of the heat source machine (the hot water supply heat exchanger 23 is set so that the hot water temperature from the heat source machine is higher (eg, 70 ° C.) than the target hot water supply temperature (eg, 42 ° C.)). The amount of combustion of the combustion burner 34 to be heated) is adjusted, and the opening of the bypass pipe is changed by the bypass control valve so that the temperature of hot water supplied from the hot water tap becomes the target hot water supply temperature.

  In addition, a liquid / liquid heat exchanger (use side heat exchanger 24) that performs heat exchange with hot water circulating in the heating circuit (42) to which the heating terminal is connected is provided in the middle of the heating circulation path. In the heating independent operation, the heat source machine is controlled so that the temperature of the hot water from the heat source machine is higher than the set temperature (such as 80 ° C.) of the hot water supplied to the heating circuit (such as 85 ° C.). Yes.

  In addition, during simultaneous operation of hot water supply operation and heating operation, the temperature of hot water from the heat source machine is controlled to a high temperature (85 ° C), and the flow rate of water mixed from the bypass pipe to the hot water supply pipe is adjusted by the bypass control valve. Hot water at a hot water supply temperature is supplied from the tap.

JP 2008-82633 A

  In the hot water supply and heating system described in Patent Document 1, the hot water heated by the operation heat source machine and discharged into the hot water supply pipe is also supplied to the heating circuit side branched from the hot water supply pipe during simultaneous operation of the hot water supply operation and the heating operation. Supplied. Therefore, if the amount of heat consumed in the simultaneous operation increases, the amount of heating in the heat source machine may be insufficient, and the temperature of the hot water supplied to the hot water tap may be lower than the target hot water supply temperature.

  The present invention has been made in view of such a background, and provides a hot water supply and heating system that prevents the temperature of hot water supplied from a hot water tap from becoming lower than a target hot water supply temperature during simultaneous operation of a hot water supply operation and a heating operation. The purpose is to do.

The present invention has been made to achieve the above object, and the hot water supply and heating system of the present invention includes:
A heat source device connected to the water supply pipe and the hot water supply pipe to heat the water flowing from the water supply pipe to the hot water supply pipe;
A heating pipe branched from the hot water pipe and communicating with the water pipe;
A heater connected to the middle of the heating pipe, and having a pump and a radiator that circulates water in the heating pipe via the heat source unit;
A hot water supply bypass pipe that communicates a location upstream of the water supply pipe with the heating pipe and a location downstream of the hot water supply pipe with the heating pipe;
A heating control unit that performs a heating operation to dissipate heat from the radiator by operating the pump in a state where the heat source unit is activated,
In the state where the heat source device is activated, the hot water supply pipe connected to the downstream end of the hot water supply pipe is supplied with hot water having a first target hot water temperature at the connection point between the hot water supply pipe and the hot water supply bypass pipe. A hot water supply control unit for performing a hot water supply operation by performing mixed temperature control for adjusting a mixing ratio of hot water from the hot water supply pipe and water from the hot water supply bypass pipe;
A heating flow rate changing unit for changing the flow rate of hot water flowing through the heating pipe;
When the total amount of heat consumed by the heating operation and the amount of heat consumed by the hot water supply operation is equal to or greater than the maximum amount of heat that can be applied by the heat source device during the simultaneous operation of the heating operation and the hot water supply operation, And a priority control unit for performing hot water supply priority control for decreasing the flow rate of the hot water flowing through the heating pipe by the flow rate changing unit.

  According to the present invention, the priority control unit is configured such that, during the simultaneous operation of the heating operation and the hot water supply operation, the total heat amount of the heat amount consumed in the heating operation and the heat amount consumed in the hot water supply operation is the maximum amount. When the amount of heat is greater than or equal to the amount of heat, the hot water supply priority control is performed to reduce the flow rate of hot water flowing through the heating pipe by the heating flow rate changing unit.

  In this way, by performing the hot water supply priority control and reducing the flow rate of hot water flowing through the heating pipe, the flow rate of hot water mixed into the water supply pipe from the heating pipe is reduced and heated by the heat source machine. The flow of hot water is reduced. Therefore, it is possible to prevent the temperature of hot water supplied to the hot water tap from becoming lower than the target hot water supply temperature due to a lack of heating amount by the heat source device relative to the flow rate of hot water flowing through the heat source device. Can do.

In the present invention,
A priority operation setting unit configured to set priority on either the heating operation or the hot water supply operation during the simultaneous operation of the heating operation and the hot water supply operation;
The priority control unit is set to give priority to hot water supply operation by the priority operation setting unit when a total heat amount of the heat amount consumed in the heating operation and the heat amount consumed in the hot water supply operation is equal to or greater than the maximum heat amount. It is preferable to perform the hot water supply priority control when it is present, and to perform the heating priority control for lowering the first target hot water temperature when the heating operation priority is set by the priority operation setting unit.

  According to this configuration, the priority control unit performs the heating priority control for lowering the first target hot water supply temperature when the heating operation priority is set. Thus, by lowering the first target hot water supply temperature, the flow rate of the water branched from the water supply pipe to the hot water supply bypass pipe side in the mixed temperature control increases, and the heat source device is circulated by this increase. The flow rate of hot water is reduced. Therefore, when the amount of heating by the heat source device is insufficient with respect to the flow rate of hot water flowing through the heat source device, the temperature of the hot water supplied from the heat source device to the heating pipe via the hot water supply pipe decreases. This can be prevented and the heating operation can be performed.

In the present invention,
It is preferable that the priority control unit notifies that the first target hot water supply temperature has been lowered when the first target hot water supply temperature is lowered and the hot water supply priority control is performed.

  According to this configuration, by notifying the user that the first target hot water supply temperature has been lowered, the user feels uncomfortable with respect to the fact that the temperature of the hot water supplied from the hot water tap is low. Can be relieved.

In the present invention,
A priority operation setting unit configured to set priority on either the heating operation or the hot water supply operation during the simultaneous operation of the heating operation and the hot water supply operation;
A water supply flow rate changing unit for changing the flow rate of water supplied to the water supply pipe,
The priority control unit is set to give priority to hot water supply operation by the priority operation setting unit when a total heat amount of the heat amount consumed in the heating operation and the heat amount consumed in the hot water supply operation is equal to or greater than the maximum heat amount. When the heating operation priority is set by the priority operation setting unit, the heating priority control is performed to reduce the flow rate of water supplied to the water supply pipe by the supply water flow rate changing unit. It is preferable.

  According to this configuration, when the heating operation priority is set, the priority control unit performs the heating priority control in which the flow rate of water supplied to the water supply pipe is decreased by the water supply flow rate changing unit. Thus, by reducing the flow rate of water supplied to the water supply pipe, the flow rate of hot water flowing through the heat source machine (flow rate of water supplied to the water supply pipe + mixed from the heating pipe to the water supply pipe) The flow rate of hot water is reduced. Therefore, when the amount of heating by the heat source device is insufficient with respect to the flow rate of hot water flowing through the heat source device, the temperature of the hot water supplied from the heat source device to the heating pipe via the hot water supply pipe decreases. This can be prevented and the heating operation can be performed.

In the present invention,
A second hot water temperature sensor for detecting the temperature of hot water discharged from the heat source device to the hot water supply pipe;
It is preferable that the hot water supply control unit performs the mixed temperature control based on a temperature detected by the second hot water temperature sensor.

  In this case, it is not necessary to provide a configuration for performing communication between the temperature control unit and the heat source unit.

The block diagram of the hot-water supply heating system of 1st Embodiment. The operation | movement flowchart of a priority control part. The block diagram of the hot-water supply heating system of 2nd Embodiment.

  An embodiment of a hot water supply and heating system of the present invention will be described with reference to FIGS. First, with reference to FIG. 1, FIG. 2, the hot water supply / heating system 1a of 1st Embodiment is demonstrated.

[First Embodiment]
Referring to FIG. 1, a hot water supply / heating system 1 a according to the first embodiment is configured by connecting a heat source device 10 and a heating connection unit 40 a via a water supply pipe 2 and a hot water supply pipe 3. A water supply (not shown) is connected to the water supply pipe 2, and water is supplied from the water supply to the water supply pipe 2 when the currant 5 (corresponding to the hot water tap of the present invention) connected to the downstream end of the hot water supply pipe 3 is open. Is done.

  The heat source unit 10 has a water supply pipe 2 connected to the inlet side and an outlet side connected to the hot water supply pipe 3, and is connected to the water supply pipe 2 and the hot water supply pipe 3 to circulate water from the water supply pipe 2 to the hot water supply pipe 3. The heat exchanger 11 that heats the water, the heat source unit flow sensor 12 that detects the flow rate of water supplied from the water supply pipe 2 to the heat exchanger 11, and the flow rate of water supplied from the water supply pipe 2 to the heat exchanger 11. The heat source machine flow rate change valve 13 to be changed, the incoming water temperature sensor 14 for detecting the temperature of the water supplied from the water supply pipe 2 to the heat exchanger 11, and the temperature of the hot water discharged from the heat exchanger 11 to the hot water supply pipe 3 are set. A first hot water temperature sensor 15 to be detected and a heat source device controller 20 for controlling the overall operation of the heat source device 10 are provided.

  The heat source device controller 20 is an electronic circuit unit configured by a CPU, a memory, an interface circuit, and the like (not shown), and the operation of the heat source device 10 is executed by the CPU executing a control program for the heat source device 10 held in the memory. Fulfills the function of controlling

  Each detection signal of the heat source unit flow rate sensor 12, the incoming water temperature sensor 14, and the first hot water temperature sensor 15 is input to the heat source unit controller 20, and the heat source unit controller 20 supplies the heat source unit 10 to the heat source unit 10 from these detection signals. Of water to be supplied (hereinafter referred to as heat source flow rate Fin), temperature Tin of water supplied from the water supply pipe 2 to the heat source unit 10 (hereinafter referred to as heat source incoming temperature Tin), and hot water discharged from the heat source unit 10 to the hot water supply pipe 3 The hot water temperature Tout (hereinafter referred to as heat source hot water temperature Tout) is recognized.

  Further, the opening degree of the heat source unit flow rate change valve 13 and the amount of heating by the heat exchanger 11 are controlled by a control signal output from the heat source unit controller 20. Here, the heat exchanger 11 is heated by a burner (not shown) (gas or petroleum is used as fuel), and the amount of heating in the heat exchanger 11 is controlled by changing the amount of combustion of the burner.

  In addition, the heat source controller 20 sets the temperature of hot water discharged from the heat source device 10 to the hot water supply pipe 3 (second target hot water temperature), the temperature of hot water discharged from the currant 5 (first target hot water temperature), and the like. The heat source machine remote controller 30 is connected to be communicable with each other.

  Next, the heating connection unit 40a includes a hot water supply bypass pipe 45 that communicates between the branch point A of the water supply pipe 2 and the junction point D of the hot water supply pipe 3, and a water supply flow rate change valve 80 that changes the opening of the water supply pipe 2. (Corresponding to the water supply flow rate changing portion of the present invention), the heating pipe 46 communicating between the branching point C of the hot water supply pipe 3 and the joining point B of the water supply pipe 2, and the flow rate Fc of hot water flowing through the heating pipe 46 (hereinafter referred to as the heating pipe 46). A heating flow rate sensor 41 for detecting a heating flow rate Fc, a heating return temperature sensor 42 for detecting a temperature Tc of hot water flowing into the junction B from the heating pipe 46 (hereinafter referred to as a heating return temperature Tc), and a heating pipe. A heating flow rate changing valve 44 (corresponding to a heating flow rate changing unit of the present invention) that changes the opening of 46 and a connection unit controller 50a that controls the overall operation of the heating connection unit 40a are provided.

  Further, in the middle of the heating pipe 46, a heater 60 (for example, including a pump 62 that circulates hot water in the heating pipe 46 and a radiator 61 that performs heat radiation from the hot water flowing through the heating pipe 46). Hot air heater and floor heater) are connected.

  The connection unit controller 50a is an electronic circuit unit configured by a CPU, a memory, an interface circuit, and the like (not shown), and the heating control unit 51a is executed by executing a control program for the heating connection unit 40a held in the memory by the CPU. It functions as the hot water supply control unit 52a and the priority control unit 53a, and controls the operation of the heating connection unit 40a.

  Detection signals from the heating flow sensor 41 and the heating return temperature sensor 42 are input to the connection unit controller 50a, and the connection unit controller 50a recognizes the heating return temperature Tc and the heating flow rate Fc from these detection signals.

  The operations of the pump 62, the heating flow rate change valve 44, and the feed water flow rate change valve 80 are controlled by a control signal output from the connection unit controller 50a. The connection unit controller 50a and the heat source device controller 20 are configured to be capable of mutual communication.

  The connection unit controller 50a recognizes the heat source flow rate Fin, the heat source water temperature Tin, and the heat source hot water temperature Tout through communication with the heat source controller 20. The connection unit controller 50 a controls the opening degree of the heat source unit flow rate change valve 13 through communication with the heat source unit controller 20.

  The user can operate the heat source device remote controller 30 to set the first target hot water temperature, set the second target hot water temperature, instruct the operation and stop of the heater 60, and the like. The heat source machine remote controller 30 transmits data of the first target hot water temperature to the heat source machine controller 20 when the first target hot water temperature is set, and the second target hot water temperature when the second target hot water temperature is set. Data is transmitted to the heat source machine controller 20. And the heat source machine controller 20 transfers the data of the 1st target hot-water supply temperature and the 2nd target hot-water supply temperature to the connection unit controller 50a.

  Further, the heat source machine remote controller 30 transmits data instructing the operation of the heater 60 to the heat source apparatus controller 20 when an instruction to operate the heater 60 is given. And the heat source machine controller 20 transfers the data which instruct | indicates the action | operation of the heater 60 to the connection unit controller 50a.

  Similarly, when an instruction to stop the heater 60 is given, the heat source machine remote controller 30 transmits data instructing the heater 60 to stop to the heat source controller 20. And the heat-source equipment controller 20 transfers the data which instruct | indicates the stop of the heater 60 to the connection unit controller 50a.

  By such communication between the heat source remote controller 30 and the heat source controller 20 and between the heat source controller 20 and the connection unit controller 50a, the setting of the hot water supply temperature from the currant 5 by the operation of the heat source remote controller 30, and the heater 60 It is possible to instruct the operation and stop of.

  The heat source machine controller 20 heats the water flowing through the heat exchanger 11 by burning the burner when the heat source flow rate Fin is equal to or higher than a preset ignition flow rate. The heat source controller 20 adjusts the combustion amount of the burner so that the heat source hot water temperature Tout becomes the second target hot water supply temperature (for example, 80 ° C.). And the heat source controller 20 stops the burner combustion when the heat source flow rate Fin becomes smaller than the ignition flow rate.

  The heating controller 51a of the connection unit controller 50a operates the pump 62 when receiving data instructing the start of the heating operation from the heat source controller 20. By the operation of the pump 62, water circulates from the heating pipe 46 to the water supply pipe 2, and the burner of the heat source unit 10 starts to burn (a state in which the heat source unit 10 is operated). Then, the hot water supplied from the heat source device 10 to the hot water supply pipe 3 flows into the heating pipe 46 at the branch point C, and the heating operation in which the heat is radiated by the radiator 61 is executed. When the heating operation is performed, the heating flow rate change valve 44 is basically fully opened.

  Moreover, the heating control part 51a stops the action | operation of the pump 62, when the data which instruct | indicates the stop of heating operation from the heat-source equipment controller 20 is received. By stopping the pump 62, the inflow of hot water from the heating pipe 46 to the water supply pipe 2 is stopped, and the combustion of the burner of the heat source unit 10 is stopped. And the inflow of the hot water from the branch location C of the hot water supply pipe 3 to the heating pipe 46 stops, and heating operation is complete | finished.

  The hot water controller 52a of the connection unit controller 50a is configured so that when the currant 5 is opened and water is supplied from the water pipe to the water supply pipe 2, hot water having the first target hot water temperature is discharged from the currant 5. The flow rate of water supplied from the water supply pipe 2 to the heat source machine 10 side by changing the opening of the heat source machine flow rate change valve 13 and the flow rate of water supplied from the water supply pipe 2 to the hot water supply bypass pipe 45 side A hot water supply operation is performed by performing a mixed temperature control for changing the mixing ratio. When the hot water supply operation is executed, the feed water flow rate changing valve 80 is basically fully opened.

  Here, whether or not water is supplied from the water pipe to the water supply pipe 2 is recognized by the difference between the heat source flow rate Fin and the heating flow rate Fc. The hot water supply control unit 52a recognizes that water is being supplied from the water pipe to the water supply pipe 2 when Fth (water supply determination value) <Fin−Fc.

  Next, a procedure for setting the opening degree of the heat source unit flow rate change valve 13 when the hot water supply control unit 52a executes the hot water supply operation at the first target hot water supply temperature when the heating control unit 51a performs the heating operation. explain.

  The relationship of the following formula | equation (1) is materialized about the hot water which flows through the distribution channel of the hot water supply / heating system 1a.

Fw × T1set = Tout × (Fw−Fb) + Tw × Fb (1)
Fw: flow rate of water supplied from the water pipe to the water supply pipe 2 (feed water flow rate), T1set: first target hot water supply temperature, Tout: temperature of hot water supplied from the heat exchanger 11 to the hot water supply pipe 3 (heat source hot water) Temperature), Fb: flow rate of water flowing through the hot water supply bypass pipe 45 (hot water supply bypass flow rate, Fb = Fw−Fin + Fc), Tw: temperature of water supplied from the water pipe to the water supply pipe 2 (water supply temperature).

  When the above equation (1) is modified, the following equation (2) is obtained.

Fb = Fw × (Tout−T1set) / (Tout−Tw) (2)
Moreover, the relationship of the following formula | equation (3) is realized among the feed water flow rate Fw, the hot water supply bypass flow rate Fb, and the heating flow rate Fc.

Fin = Fw−Fb + Fc (3)
Substituting the above equation (2) into the above equation (3) yields the following equation (4).

Fin = Fw−Fw × (Tout−T1set) / (Tout−Tw) + Fc
= Fw × (T1set−Tw) / (Tout−Tin) + Fc (4)
Here, according to the opening degree of the heat source unit flow rate change valve 13, the flow rate of water flowing from the branch point A of the water supply pipe 2 and the hot water supply bypass pipe 45 to the heat source unit 10 side (= Fin−Fc), and from the branch point A The ratio of the flow rate of water flowing to the hot water supply bypass pipe 45 (hot water supply bypass flow rate) Fb changes. That is, the relationship of the following formula | equation (4) is materialized.

Fin−Fc = Fw · k (5)
However, k: distribution ratio of water to the heat source device 10 side at the branch point A set by the opening degree of the heat source device flow rate change valve 13 (0 ≦ k ≦ 1).

  Therefore, the feed water flow rate Fw can be calculated from the detected values of the heat source flow rate Fin and the heating flow rate Fc and the opening degree of the heat source unit flow rate change valve 13. And the hot water supply control part 52a is based on the detected temperature of the heat source hot water temperature Tout so that the heat source flow Fin detected by the heat source flow sensor 12 matches the calculated value by the above equation (4). The opening degree of the change valve 13 is adjusted. Thereby, the temperature of the hot water supplied from the hot water supply pipe 3 to the currant 5 is controlled to the first target hot water supply temperature T1set.

  In the mixed temperature control by the hot water supply controller 52a, the second target hot water temperature data is received from the heat source device 10 instead of the detected temperature data of the heat source hot water temperature Tout, and the second target hot water temperature is expressed by the above formula ( It may be used as Tout of 1).

  Next, processing by the priority control unit 53a during simultaneous operation of hot water supply operation and heating operation will be described with reference to the flowchart shown in FIG. The priority control unit 53a repeatedly executes the flowchart shown in FIG. 2 when the hot water supply operation and the heating operation are simultaneously performed.

  In STEP 1 of FIG. 2, the priority control unit 53 a calculates a hot water supply heat amount Qw that is a heat amount consumed in the hot water supply operation by the following equation (6).

Qw = Fw × (T1set−Tin) (6)
However, Qw: hot water supply heat amount, Fw: flow rate of water supplied from the water pipe to the water supply pipe 2 (water supply flow rate), T1set: first target hot water supply temperature, Tin: heat source incoming water temperature.

  In subsequent STEP2, the priority control unit 53a calculates a heating heat quantity Qc, which is a heat quantity consumed in the heating operation, by the following equation (7).

Qc = Fc × (Tout−Tc) (7)
However, Qc: Heating heat amount, Fc: Heating flow rate, Tout: Heat source hot water temperature (heating forward temperature), Tc: Heating return temperature.

  In the next STEP 3, the priority control unit 53 a sets the maximum heat amount of the heat source unit 10 (the maximum amount of heat obtained by the heat exchanger 11 by burning of the burner) Qmax through communication between the connection unit controller 50 a and the heat source unit controller 20. To do.

  In the next STEP 4, the priority control unit 53a determines whether or not the total heat amount of the hot water supply heat amount Qw and the heating heat amount Qc is equal to or greater than the maximum heat amount Qmax. If the total heat quantity of the hot water supply heat amount Qw and the heating heat quantity Qc is equal to or greater than the maximum heat quantity Qmax, the process proceeds to STEP5.

  In STEP5, the priority control unit 53a determines whether or not the hot water supply operation priority is set by the heat source device remote controller 30. Here, the user operates the heat source device remote controller 30 and, at the same time of the hot water supply operation and the heating operation, the hot water operation prioritizes the hot water operation over the heating operation or the heating operation prioritizes the heating operation over the hot water operation. Priority settings can be made.

  And the priority control part 53a recognizes whether the hot water supply operation priority is set by communication between the heat source device controller 20 and the connection unit controller 50a. The configuration in which the hot water supply operation priority and the heating operation priority are set by the heat source device remote controller 30 corresponds to the priority operation setting unit of the present invention.

If the hot water supply operation priority is set, the process branches to STEP20. And the priority control part 53a performs either or both of the following (a) and (b), performs hot water supply priority control which reduces the flow volume of the hot water which distribute | circulates the heating pipe 46, and progresses to STEP7.
(A) The rotational speed of the pump 62 is decreased.
(B) The opening degree of the heating flow rate change valve 44 is reduced.

  In addition, the structure which changes the rotational speed of the pump 62 or the opening degree of the heating flow rate change valve 44, and changes the flow volume of the hot water which distribute | circulates the heating pipe 46 is equivalent to the heating flow rate change part of this invention.

  By reducing the flow rate of hot water flowing through the heating pipe 46 by hot water supply priority control, the flow rate of hot water mixed into the water supply pipe 2 from the heating pipe 46 is reduced, and hot water flowing through the heat exchanger 11 is heated. The flow rate decreases. Therefore, the temperature of the hot water discharged from the heat exchanger 11 to the hot water supply pipe 3 is maintained at the second target hot water temperature T2set, and the temperature of the hot water supplied from the currant 5 becomes lower than the first target hot water temperature T1set. Can be prevented.

On the other hand, when the hot water supply operation priority is not set in STEP 5 (when the heating operation priority is set), the process proceeds to STEP 6. And the priority control part 53a performs either or both of the following (c) and (d), and reduces the flow volume of the water supplied to the heat exchanger 11 via the water supply pipe 2 from water supply. Heating priority control is performed and it progresses to STEP7.
(C) Lower the first target hot water supply temperature T1set. By reducing the first target hot water supply temperature T1set, the ratio of the water flowing to the hot water supply bypass pipe 45 in the water supplied from the water supply to the water supply pipe 2 increases, so that it is supplied from the water supply pipe 2 to the heat exchanger 11. The flow rate of hot water decreases.
(D) The opening degree of the feed water flow rate changing valve 80 is reduced. The flow rate of hot water supplied from the water supply pipe 2 to the heat exchanger 11 is reduced by reducing the opening of the water supply flow rate changing valve 80 and reducing the flow rate of water supplied from the water supply to the water supply pipe 2.

  By reducing the flow rate of water supplied from the water supply to the heat exchanger 11 through the water supply pipe 2 by heating priority control, the flow rate of hot water flowing through the heat exchanger 11 is reduced. Therefore, the temperature of the hot water discharged from the heat exchanger 11 to the hot water supply pipe 3 is maintained at the second target hot water supply temperature T2set, and hot water having the second target hot water supply temperature T2set is supplied from the hot water supply pipe 3 to the heating pipe 46. Heating by the machine 60 can be performed.

  When the first target hot water supply temperature T1set is lowered and the hot water supply operation is executed by the process of (c) above, the lowered first target hot water supply temperature T1set is displayed on the display unit of the heat source remote controller 30, or The first target hot water supply temperature T1set may be lowered by the heating priority control, and it may be notified by display or sound that the hot water supply temperature from the currant 5 is lowered.

  In STEP 7, the priority control unit 53a determines whether or not the hot water supply operation or the heating operation is stopped and the hot water supply operation or the heating operation is performed alone. And when it becomes independent operation, it progresses to STEP8 and complete | finishes a process. On the other hand, when it is not in the independent operation (when the simultaneous operation of the hot water supply operation and the heating operation is continued), the process returns to STEP 1 and the priority control unit 53a executes the processes after STEP 1 again.

[Second Embodiment]
Next, with reference to FIG. 3, the hot water supply heating system 1b of 2nd Embodiment is demonstrated. About the same structure as the hot water supply heating system 1a of 1st Embodiment mentioned above, the same code | symbol is attached | subjected and description is abbreviate | omitted. The configurations of the heat source device 10 and the heater 60 of the hot water supply / heating system 1b are the same as those of the hot water supply / heating system 1a of the first embodiment.

  The heating connection unit 40b is different from the hot water supply / heating system 1a of the first embodiment in that it does not have a function of performing communication with the heat source device 10. The heating connection unit 40b detects the temperature Tout of hot water supplied from the hot water supply pipe 3 (hereinafter referred to as heat source hot water temperature Tout) in order to perform hot water supply operation without communication with the heat source device 10. A flow rate Fb of water flowing through the hot water supply bypass pipe 45 (hereinafter referred to as hot water supply bypass flow rate Fb), which detects the temperature Tb of water flowing through the sensor 43 and the hot water supply bypass pipe 45 (hereinafter referred to as hot water supply bypass temperature Tb). And a bypass flow rate changing valve 49 for changing the opening degree of the hot water supply bypass pipe 45.

  The heating connection unit 40b includes a connection unit controller 50b that controls the overall operation of the heating connection unit 40b, and a connection unit remote controller 70 connected to the connection unit controller 50b.

  The connection unit controller 50b is an electronic circuit unit configured by a CPU, a memory, an interface circuit, and the like (not shown), and the heating control unit 51b is executed by executing a control program for the heating connection unit 40b held in the memory by the CPU. It functions as the hot water supply control unit 52b and the priority control unit 53b, and controls the operation of the heating connection unit 40b.

  Detection signals of the heating flow rate sensor 41, the heating return temperature sensor 42, the second hot water temperature sensor 43, the hot water supply bypass temperature sensor 47, and the hot water supply bypass flow rate sensor 48 are input to the connection unit controller 50b, and from these detection signals, The connection unit controller 50b recognizes the heat source hot water temperature Tout, the heating return temperature Tc, the heating flow rate Fc, the hot water supply bypass temperature Tb, and the hot water supply bypass flow rate Fb. The operation of the pump 62, the bypass flow rate change valve 49, the heating flow rate change valve 44, and the feed water flow rate change valve 80 is controlled by a control signal output from the connection unit controller 50b.

  The user can operate the connection unit remote controller 70 to set the first target hot water supply temperature, instruct the operation and stop of the heater 60, and the like. When the first target hot water temperature is set, the connection unit remote controller 70 transmits data on the target hot water temperature to the connection unit controller 50b.

  Further, the connection unit remote controller 70 transmits data instructing the operation of the heater 60 to the connection unit controller 50b when an instruction to operate the heater 60 is given. Similarly, the connection unit remote controller 70 transmits data instructing the stop of the heater 60 to the connection unit controller 50b when an instruction to stop the heater 60 is given.

  Through the communication between the connection unit remote controller 70 and the connection unit controller 50b, it is possible to set the temperature of hot water discharged from the currant 5 and to operate and stop the heater 60 by operating the connection unit remote controller 70. It has become.

  When the heating control unit 51b of the connection unit controller 50b receives data instructing the start of the heating operation from the connection unit remote controller 70, the heating control unit 51b operates the pump 62. By the operation of the pump 62, water circulates from the heating pipe 46 to the water supply pipe 2, and the burner of the heat source unit 10 starts to burn (a state in which the heat source unit 10 is operated). Then, the hot water supplied from the heat source device 10 to the hot water supply pipe 3 flows into the heating pipe 46 at the branch point C, and the heating operation in which the heat is radiated by the radiator 61 is executed.

  Moreover, the heating control part 51b stops the action | operation of the pump 62, when the data which instruct | indicates the stop of heating operation from the connection unit remote control 70 is received. By stopping the pump 62, the inflow of hot water from the heating pipe 46 to the water supply pipe 2 is stopped, and the combustion of the burner of the heat source unit 10 is stopped. And the inflow of the hot water from the branch location C of the hot water supply pipe 3 to the heating pipe 46 stops, and heating operation is complete | finished.

  The hot water supply controller 52b of the connection unit controller 50b allows hot water at the first target hot water temperature T1set to be discharged from the curan 5 when the currant 5 is opened and water is supplied from the water pipe to the water supply pipe 2. In addition, the opening degree of the bypass flow rate change valve 49 is changed so that the flow rate of water supplied from the water supply pipe 2 to the heat source unit 10 side and the flow rate of water supplied from the water supply pipe 2 to the hot water supply bypass pipe 45 side are Change the ratio.

  The hot water supply control unit 52b recognizes that water is supplied from the water pipe to the water supply pipe 2 when the hot water supply bypass flow rate Fb is equal to or greater than Fth2 (Fth2 ≦ Fb).

  Next, a procedure for setting the bypass ratio when the hot water supply control unit 52b executes the hot water supply operation at the first target hot water supply temperature T1set will be described.

  About the hot water flowing through the distribution channel of the hot water supply and heating system 1b, the relationships of the above formulas (1) to (4) are established in the same manner as the hot water supply and heating system 1a described above. And according to the opening degree of the bypass flow rate change valve 49, the flow rate of water flowing from the branch point A of the water supply pipe 2 and the hot water supply bypass pipe 45 to the heat source unit 10 side, and the water flowing from the branch point A to the hot water supply bypass pipe 45 side The ratio of the flow rate (hot water supply bypass flow rate Fb) changes. That is, the relationship of the following formula | equation (8) is materialized.

Fb = Fw · g (8)
However, Fw: Flow rate of water supplied from the water pipe to the water supply pipe 2 (feed water flow rate) g: Distribution of water to the hot water supply bypass pipe 45 side at the branch point A set by the opening degree of the bypass flow rate change valve 49 Ratio (0 ≦ g ≦ 1).

  Therefore, the water supply flow rate Fw can be calculated from the detected value of the hot water supply bypass flow rate Fb and the opening degree of the bypass flow rate change valve 49. And the hot water supply control part 52b is based on the detection temperature of the heat-source hot-water temperature Tout so that the hot-water supply bypass flow Fb detected by the hot-water supply bypass flow sensor 48 may correspond with the calculated value by said Formula (2). The opening degree of the change valve 49 is adjusted. Thereby, the temperature of the hot water supplied from the hot water supply pipe 3 to the currant 5 is controlled to the first target hot water supply temperature T1set.

  Next, as with the priority control unit 53a of the first embodiment, the priority control unit 53b is configured such that the total heat amount of the hot water supply heat amount Qw and the heating heat amount Qc is equal to or greater than the maximum heat amount Qmax during simultaneous operation of the hot water supply operation and the heating operation. At some time, hot water supply operation priority control or heating operation priority control is performed.

  However, in the second embodiment, since the communication between the heat source device controller 20 and the connection unit controller 50b is not performed, the data of the maximum heat quantity Qmax of the heat source device 10 is stored in advance in a memory (not shown) of the connection unit controller 50b. It is necessary to keep it. And the priority control part 53b reads these data hold | maintained at memory, and acquires maximum heat amount Qmax.

  In addition, the user sets hot water supply operation priority and heating operation priority by operating the connection unit remote controller 70 instead of the heat source remote controller 30. In addition, the structure which sets hot water supply operation priority and heating operation priority with the connection unit remote control 70 is equivalent to the priority operation setting part of this invention.

  In the present embodiment, the heat source apparatus 10 including the burner 22 is shown as a heating means. However, other types of fuel such as those using other types of heating means such as an electric heater, or burners using oil as fuel. The present invention can also be applied to a hot water supply apparatus equipped with a burner that burns.

  Further, in the present embodiment, the temperature of the hot water (second target hot water supply temperature) supplied from the heat source device 10 to the heating connection units 40a and 40b is set by the heat source device remote controller 30, but is fixed in advance. It is good also as temperature (for example, 80 degreeC).

  DESCRIPTION OF SYMBOLS 1a, 1b ... Hot water supply heating system, 2 ... Water supply pipe, 3 ... Hot water supply pipe, 10 ... Heat source machine, 11 ... Heat exchanger, 30 ... Heat source machine remote control, 40a, 40b ... Heating connection unit, 44 ... Heating flow rate change valve, 50a, 50b ... connection unit controller, 51a, 51b ... heating control unit, 52a, 52b ... hot water supply control unit, 53a, 53b ... priority control unit, 60 ... heater, 70 ... connection unit remote control, 80 ... feed water flow rate change valve.

Claims (5)

A heat source device connected to the water supply pipe and the hot water supply pipe to heat the water flowing from the water supply pipe to the hot water supply pipe;
A heating pipe branched from the hot water pipe and communicating with the water pipe;
A heater connected to the middle of the heating pipe, and having a pump and a radiator that circulates water in the heating pipe via the heat source unit;
A hot water supply bypass pipe that communicates a location upstream of the water supply pipe with the heating pipe and a location downstream of the hot water supply pipe with the heating pipe;
A heating control unit that performs a heating operation to dissipate heat from the radiator by operating the pump in a state where the heat source unit is activated,
In the state where the heat source device is activated, the hot water supply pipe connected to the downstream end of the hot water supply pipe is supplied with hot water having a first target hot water temperature at the connection point between the hot water supply pipe and the hot water supply bypass pipe. A hot water supply control unit for performing a hot water supply operation by performing mixed temperature control for adjusting a mixing ratio of hot water from the hot water supply pipe and water from the hot water supply bypass pipe;
A heating flow rate changing unit for changing the flow rate of hot water flowing through the heating pipe;
When the total amount of heat consumed by the heating operation and the amount of heat consumed by the hot water supply operation is equal to or greater than the maximum amount of heat that can be applied by the heat source device during the simultaneous operation of the heating operation and the hot water supply operation, A hot water supply and heating system, comprising: a priority control unit that performs hot water supply priority control for reducing a flow rate of hot water flowing through the heating pipe by a flow rate changing unit. In the hot water supply and heating system according to claim 1,
A priority operation setting unit configured to set priority on either the heating operation or the hot water supply operation during the simultaneous operation of the heating operation and the hot water supply operation;
The priority control unit is set to give priority to hot water supply operation by the priority operation setting unit when a total heat amount of the heat amount consumed in the heating operation and the heat amount consumed in the hot water supply operation is equal to or greater than the maximum heat amount. The hot water supply priority control is performed when the hot water supply priority control is performed, and when the priority operation setting unit sets the heating operation priority, the heating priority control is performed to lower the first target hot water supply temperature. In the hot water supply and heating system according to claim 2,
The priority control unit notifies that the first target hot water supply temperature has been lowered when performing the hot water supply priority control by lowering the first target hot water supply temperature. system. The hot water supply / heating system according to claim 1,
A priority operation setting unit configured to set priority on either the heating operation or the hot water supply operation during the simultaneous operation of the heating operation and the hot water supply operation;
A water supply flow rate changing unit for changing the flow rate of water supplied to the water supply pipe,
The priority control unit is set to give priority to hot water supply operation by the priority operation setting unit when a total heat amount of the heat amount consumed in the heating operation and the heat amount consumed in the hot water supply operation is equal to or greater than the maximum heat amount. When the heating operation priority is set by the priority operation setting unit, the heating priority control is performed to reduce the flow rate of water supplied to the water supply pipe by the supply water flow rate changing unit. A hot water supply and heating system. In the hot water supply and heating system according to any one of claims 1 to 4,
A second hot water temperature sensor for detecting the temperature of hot water discharged from the heat source device to the hot water supply pipe;
The hot water supply control unit performs the mixed temperature control based on a temperature detected by the second hot water temperature sensor.