JP6766226B2 - Heat source device - Google Patents

Description

The present invention relates to, for example, a heat source device using a valve used for mixing and distributing a heat medium for hot water supply, reheating of bathtub water, heating, and the like.

In the conventional heat source device having a hot water supply function, a reheating function, and a heating function, for example, a heat exchanger for heating is installed separately from the heat exchanger for hot water supply as a heat exchanger that uses combustion heat as a heat source, and a heat medium for heating is further installed. It is equipped with a reheating heat exchanger that exchanges heat with. Further, it is known that the heat medium heated by the heat of combustion is used for heat exchange of water supply and heat exchange of bath water, in addition to the heat medium for heating, without using a heat exchanger for hot water supply using combustion heat. (For example, Patent Document 1).

JP-A-2007-187419

For example, if the heat medium is heated without installing a hot water supply heat exchanger that is heated by the heat of combustion, the combustion heat source can be made compact, and the heat exchanged between the burner's combustion heat and the heat medium can be performed on the heat medium. By exchanging heat between heat and water supply to supply hot water, the heat medium can be maintained at a constant temperature, for example, 80 [° C.], and the heat of this heat medium can be exchanged with the water supply, thus avoiding the effects of temperature changes in combustion heat. It has the advantage of stabilizing the hot water discharge characteristics.

By circulating the heat medium through the heat medium circuit to the heating circuit, the high temperature heat medium is supplied to the high temperature heating load such as a convector, and the low temperature heat medium is supplied to the low temperature heating load such as the floor heating unit. High and low temperature heating must be realized.

In this way, when a single heat medium is used to supply a low-temperature heat medium to a low-temperature heating load, a high-temperature heat medium to a high-temperature heating load, and a high-temperature heat medium that exchanges heat with water supply, the heat medium is used. There is a problem that the circuit form and the switching circuit are complicated because the distribution path of the above and the mixing path of the high and low temperature heat medium mixing are required. If the fluid circuit becomes complicated, not only the equipment cost will increase, but also the installation cost of installing the heating circuit in the existing heat source device will increase.

Therefore, in view of the above problems, an object of the present invention is to improve the efficiency of the process of distributing and mixing a fluid such as a high-temperature and low-temperature heat medium, and to simplify the circulation path of the fluid.

In order to achieve the above object, according to one aspect of the heat source device of the present invention, the heat source, the circulation path for circulating the heat medium, and the low temperature heat medium received from the circulation path, and the heat of the low temperature heat medium and the heat source are received. The high-temperature heat medium is received from the heat exchange unit by the heat exchange unit and the high-temperature heat medium is distributed to at least two systems, and the low-temperature heat medium is mixed with the high-temperature heat medium. A valve unit for obtaining a mixed heat medium is provided , and the valve unit has at least two systems of a valve body and the high temperature heat medium received from the heat exchange unit and introduced into the valve body according to a set distribution ratio. The distribution valve unit is connected to the distribution valve unit, the mixing valve unit that mixes the low temperature heat medium with the high temperature heat medium distributed by the distribution valve unit at a set mixing ratio, and the distribution valve unit and the mixing valve unit. Then, the high-temperature heat medium from the distribution valve portion is supplied from the distribution valve portion to the mixing valve portion between the connecting portion that supplies the high-temperature heat medium to the mixing valve portion and the distribution valve portion and the mixing valve portion. that having a branch portion for branching a part of the high temperature thermal medium.

According to the heat source device of the present invention, any of the following effects can be obtained.

(1) Since at least one valve unit can distribute the first fluid and mix the first and second fluids, the circulation path of the fluid can be simplified, the distribution and mixing process can be made more efficient, and the heat medium, etc. The circulation path of the fluid can be simplified.

(2) Since the fluid can be distributed and mixed with a single valve unit, highly reliable fluid processing can be performed without changing the attributes such as heat of the fluid.

(3) If the valve unit provided in this heat source device is used, a circulation path through which the first fluid flows, a circulation path through which the second fluid flows, and a mixture of the first and second fluids are mixed around the valve unit. A circulation path through which a fluid flows can be arranged, and a fluid circulation circuit can be simplified.

(4) Since the valve unit is provided with a distribution valve section and a mixing valve section, the processing and circuit system required for these controls can be simplified, and reliable valve control can be realized.

It is a figure which shows the valve unit which concerns on 1st Embodiment. It is a figure which shows the heat source apparatus which concerns on 2nd Embodiment. It is a figure which shows the hot water supply operation of a heat source apparatus. It is a figure which shows the reheating operation of a heat source apparatus. It is a figure which shows the heating operation of a heat source apparatus. It is a figure which shows the hot water supply / reheating / heating apparatus which concerns on Example 1. FIG. It is a figure which shows the control system. It is a flowchart which shows the circulation pump control. It is a flowchart which shows the burner combustion control. It is a flowchart which shows the hot water supply control. It is a figure which shows the hot water supply operation of a hot water supply / reheating / heating apparatus. It is a figure which shows the reheating operation of a hot water supply / reheating / heating apparatus. It is a figure which shows the heating operation of a hot water supply / reheating / heating apparatus. It is a figure which shows the front surface and the plane of the valve unit which concerns on Example 2. FIG. It is a figure which shows the side surface and the bottom surface of a valve unit. It is a figure which shows the XVI-XVI line cross section of B of FIG. It is an exploded perspective view which showed by cutting out a part of the distribution valve part of the valve unit which concerns on Example 3. FIG. It is a figure which shows the valve unit which concerns on Example 4. FIG. It is a figure which shows the valve unit which concerns on Example 5.

[First Embodiment]

FIG. 1 shows an example of the valve unit 2 according to the first embodiment. The valve unit 2 is provided with a single valve main body 4, and the valve main body 4 is provided with a distribution valve portion 6-1 and a mixing valve portion 6-2.

The distribution valve unit 6-1 receives, for example, a high-temperature heat medium HM1 as a first fluid in port 8-11, and at least two systems of this heat medium HM1 depending on the set distribution ratio, for example, port 8-12. , Distribute to ports 8-13. As an example, the distribution valve portion 6-1 is provided with a valve body 10-1 rotatably, and the opening degree θ11 on the port 8-12 side and the port 8-- according to the rotation of the valve body 10-1. The opening degree θ12 on the 13 side is adjusted, whereby the distribution ratio is controlled.

The mixing valve portion 6-2 receives, for example, a low temperature heat medium HM2 as a second fluid from ports 8-22 and 8-23 as two systems, and a high temperature heat medium HM1 which is the first fluid described above. , Mix according to the set mixing ratio, and let the heat medium HMn flow out from port 8-21 as a mixing fluid. In this case, the heat medium HMn is
HMn = HM1 + HM2 ... (1)
Is.

As an example, the mixing valve portion 6-2 is provided with a valve body 10-2 rotatably, and in response to the rotation of the valve body 10-2, the opening degree θ21 on the port 8-22 side and the port 8- The opening degree θ22 on the 23 side is adjusted, whereby the mixing ratio is controlled.

In this embodiment, the distribution valve portion 6-1 and the mixing valve portion 6-2 are connected between the ports 8-13 and the ports 8-23 by the connecting portion 12. The connecting portion 12 is provided with a branch portion 14, and the branch portion 14 is provided with ports 8-3. In this example, the hot heat medium HM1, which is the first fluid, flows out from ports 8-3.

Valve drive units 16-1 and 16-2 are used to control the distribution ratio and the mixing ratio. The valve drive units 16-1 and 16-2 are installed in the valve body 4. A valve control unit 18 for controlling the distribution ratio of the distribution valve unit 6-1 and the mixing ratio of the mixing valve unit 6-2 is connected to the valve drive units 16-1 and 16-2 by a signal cable. For example, a computer may be used for the valve control unit 18.

A) Distribution control

As an example, assume a high temperature heat medium HM1 having a constant flow rate. If the opening degree θ11 on the port 8-12 side and the opening degree θ12 on the port 8-13 side of the distribution valve portion 6-1 are set to, for example, θ11 = θ12, the heat on the port 8-12 side and the port 8-13 side is set. The medium flow rate is halved. That is, a half of the heat medium HM1 of the port 8-11 flows through the port 8-12, and a half of the heat medium HM1 also flows through the port 8-13.

This heat medium HM1 is branched at the branch portion 14 of the connecting portion 12 and flows to ports 8-3 and 8-23.

In this example, assuming that the flow rates of each port 8-11, 8-12, 8-13, 8-3, 8-23 are Q1, Q2, Q3, Q4, Q5.
Q1 = Q2 + Q3, ... (2)
Q3 = Q4 + Q5 ... (3)
Will be.

B) Mixing control

If the flow rate of the heat medium HM2 entering the port 8-22 is Q6 and the flow rate of the heat medium flowing out from the port 8-21 is Q7, the flow rate of the high temperature heat medium HM1 entering the port 8-23 side is Q5, so the flow rate Q7. Is
Q7 = Q5 + Q6 ・ ・ ・ (4)
Will be.

Assuming that the temperature of the heat medium HM1 is T1 and the temperature of the heat medium HM2 is T2, the temperature Tn of the heat medium HMn mixed by the mixing valve portion 6-2 is the flow rates Q5, Q6 and the mixed heat mediums HM1 and HM2. It is obtained from the respective temperatures T1 and T2.
Tn = (T1 x Q5 + T2 x Q6) / (Q5 + Q6) ... (5)

In this case, if the temperatures T1 and T2 of the heat media HM1 and HM2 are, for example, T1 = 80 [° C.] and T2 = 40 [° C.], the temperature Tn can be, for example, 80 to 40 [° C.]. , Tn≈60 [° C.] can be obtained.

<Effect of the first embodiment>

(1) In this valve unit 2, for example, a single valve body 4 is provided with at least a distribution valve portion 6-1 and a mixing valve portion 6-2, and the distribution valve portion 6-1 can distribute and mix the heat medium HM1. In the valve portion 6-2, the heat medium HM2 can be mixed with the heat medium HM1 distributed in the distribution valve portion 6-1 to obtain the heat medium HMn mixed at a desired temperature.

(2) The heat medium HMn can be quickly adjusted to a desired temperature by the distribution ratio of the heat medium HM1 by the distribution valve section 6-1 and the mixing ratio of the heat mediums HM1 and HM2 by the mixing valve section 6-2. ..

(3) As is clear from the configuration of FIG. 1, the distribution valve portion 6-1 and the mixing valve portion 6-2 can have the same configuration, and the distribution valve portion 6-1 is used as the mixing portion. , The mixing valve portion 6-2 can be used as a distribution portion.

(4) It can be used for distributing and mixing the heat medium used for hot water supply, reheating bathtub water, heating, etc., and it is possible to speed up the distribution and mixing process. In low temperature heating, the heat medium is used at the start of heating. It is possible to achieve hot dashing that speeds up the rise of the temperature of HMn.

(5) In this valve unit 2, the distribution fluid of the distribution valve portion 6-1 and the mixing fluid of the mixing valve portion 6-2 can be insulated from each other to perform their respective treatments.

(6) According to the valve unit control method using the valve unit 2, as an example, the fluid is subjected to a step of pouring the first and second fluids into the valve unit 2, a step of adjusting the distribution ratio, and a step of adjusting the mixing ratio. Distribution and mixing can be achieved with a single valve unit 2. According to this control method, in the distribution ratio adjusting step, the distribution ratio set in the distribution valve unit 6-1 is adjusted, the heat medium HM1 is received as the first fluid from the circulation path, and the distribution valve unit 6-1 is used. It can be distributed to at least two systems according to the distribution ratio set in. Further, in the step of adjusting the mixing ratio, the mixing ratio of the mixing valve portion 6-2 is adjusted so that the heat medium HM1 of at least one system of the distribution valve portion 6-1 is set to the mixing ratio of the mixed valve portion 6-2. Can be mixed accordingly. Therefore, fluid distribution and mixing can be performed efficiently and quickly by a single valve unit 2.

[Second Embodiment]

FIG. 2 shows an example of the heat source device 22 using the valve unit 2. In FIG. 2, the same parts as those in FIG. 1 are designated by the same reference numerals. The heat source device 22 is provided with a burner 40 as an example of the heat source described above, and the burner 40 is installed in the combustion chamber 42. Fuel gas G is supplied to the burner 40 as an example of fuel. An air supply fan 44 is installed in the combustion chamber 42 as an example of the air supply unit, and combustion air is supplied from the air supply fan 44 to the combustion chamber 42. The combustion exhaust EG generated in the burner 40 by the combustion of the fuel gas G flows to the exhaust hole 46 on the downstream side with the burner 40 on the upstream side.

The combustion chamber 42 is provided with a first heat exchanger 26-1, and the heat exchanger 26-1 has a first heat medium heat exchange unit 26-111 and a second heat medium heat exchange unit 26-112. , Bath water heat exchange section 26-12, and hot water supply heat exchange section 26-13 are provided. The heat medium heat exchange section 26-111 and the bath water heat exchange section 26-12 that recover the heat of the combustion exhaust EG on the upstream side are primary heat exchangers, and the heat medium heat exchange section 26-112 and the hot water supply heat exchange section Reference numeral 26-13 is a secondary heat exchanger that recovers the heat of the combustion exhaust on the downstream side after heat exchange by the primary heat exchanger.

In the first circulation path 28-1 for circulating the heat medium HM, the heat medium heat exchange units 26-111 and 26-112, the circulation pump 48-1, the tank 50, the second heat exchanger 26-2, and the distribution The valve portion 6-1 and the mixing valve portion 6-2, the high temperature heating load 54-1 and the low temperature heating load 54-2 are connected.

The tank 50 is driven by a circulation pump 48-1 to cool heat from the heat exchanger 26-2, the high temperature heating load 54-1 or the low temperature heating load 54-2, or a combination, through the circulation path 28-1. The medium HM returns. The heat medium HM from the tank 50 is preheated by the heat medium heat exchange section 26-112, then branched at the branch section 56, circulated to the heat medium heat exchange section 26-111, heated to a high temperature, and then the distribution valve section. Guided to 6-1. In the distribution valve portion 6-1, the high temperature heat medium HM is distributed to the heat exchanger 26-2 side and the branch portion 14 side.

The heat medium HM circulating in the heat exchanger 26-2 is used for heat exchange with the water supply W side. The heat medium HM that passes through the heat exchanger 26-2 and cools down returns to the tank 50 via the return path 25 that is a part of the circulation path 28-1. In other words, it returns to the heat exchanger 26-1 by a return path 25 formed separately from the heating circuits 28-11 and 28-12 of the high temperature heating load 54-1 and the low temperature heating load 54-2.

At the branch portion 14, the high-temperature heat medium HM is distributed to the mixing valve portion 6-2 and the heating circuit 28-11 side. The heat medium HM distributed to the heating circuit 28-11 side dissipates heat with the high temperature heating load 54-1 and is used for heating. As a result, the cooled heat medium HM is returned to the tank 50 and stored.

The heat medium HM distributed to the mixing valve section 6-2 side is mixed with the heat medium HM preheated by the low temperature heat medium heat exchange section 26-112, and the heat medium HM at this mixed temperature is heated. It circulates in circuit 28-12. In the heating circuit 28-12, the circulating heat medium HM is dissipated by the low temperature heating load 54-2 and used for heating. As a result, the cooled heat medium HM is returned to the tank 50 and stored.

The bathtub water heat exchange section 26-12, the circulation pump 48-2, and the bathtub 32 are connected to the second circulation path 28-2. By driving the circulation pump 48-2, the bathtub water BW circulates from the return pipe 28-21 to the bathtub water heat exchange unit 26-12, and from this bathtub water heat exchange unit 26-12 to the bathtub 32 by the outgoing pipe 28-22. Be returned.

Then, in this embodiment, the hot water supply heat exchange unit 26-13 is connected to the water supply channel 34-1. Therefore, the water supply W is preheated by the hot water supply heat exchange unit 26-13, and then the heat exchange with the heat medium HM is performed by the heat exchanger 26-2. As a result, the water supply W is supplied as hot water HW.

<Hot water supply operation>

FIG. 3 shows the hot water supply operation of the heat source device 22. In this hot water supply operation, the heat medium HM is circulated using the return path 25 of the circulation path 28-1, and heat exchange between the heat medium HM and the water supply W is performed.

<Reheating operation>

FIG. 4 shows the reheating operation of the heat source device 22. In this reheating operation, the circulation pump 48-2 is driven to circulate the bath water BW in the circulation path 28-2. In the heat exchange between the bath water BW and the combustion exhaust EG, the circulation pump 48-1 is driven to return the circulation path 28-1 in order to avoid boiling of the heat medium HM due to the heat exchange between the heat medium HM and the combustion exhaust EG. The heat medium HM is circulated using the path 25.

<Heating operation>

FIG. 5 shows the heating operation of the heat source device 22. In this heating operation, the heat medium HM is circulated in the circulation path 28-1, and the high temperature heat medium HM distributed by the distribution valve portion 6-1 of the valve unit 2 is passed through the heating circuit 28-11 to flow the high temperature heating load 54. Circulate to -1. Further, the high temperature heat medium HM distributed by the distribution valve section 6-1 and the low temperature heat medium HM are mixed by the mixing valve section 6-2 and flowed through the heating circuit 28-12 to the low temperature heating load 54-2. Circulate.

<Effect of the second embodiment>

(1) The heat exchanger 26-1 integrates the heat medium heat exchange units 26-111 and 26-112, the bath water heat exchange unit 26-12, and the hot water supply heat exchange unit 26-13 to exchange a single heat. It is configured as a container, and the heat exchanger 22 can be downsized as well as the heat exchanger can be downsized.

(2) In the heat exchanger 26-1, the combustion exhaust EG of a single burner 40 acts on a plurality of heat exchange units, so that the combustion heat can be efficiently used.

(3) The liquid heat exchanger conventionally used for heating the bathtub water BW can be omitted, and the cost can be reduced and the size can be reduced.

(4) A return path 25 is provided in the circulation path 28-1 of the heat medium HM, and the heat medium HM is circulated through the return path 25. Therefore, the heat medium from the heating circuits 28-11 and 28-12 to the heating load. Circulation can be avoided, and heat dissipation of the heat medium HM can be avoided.

(5) Since one valve unit 2 having a distribution valve section 6-1 and a mixing valve section 6-2 adjacent to each other is used, the number of components is reduced and the circulation path 28-1 of the heat medium HM is simplified or simplified. Can be planned.

(6) In the heat exchanger 26-2, heat exchange between the heat medium HM and the water supply W can be performed. For example, heat exchange between the heat medium HM at 80 [° C.] and the water supply W can be performed, and hot water supply of the hot water HW can be performed. The characteristics can be stabilized.

(7) When reheating the bath water BW, the combustion heat can be directly received from the combustion exhaust EG at the bath water heat exchange section 26-12 included in the heat exchanger 26-1, and the heating rise characteristic of the bath water BW can be improved. Can be enhanced. That is, the bath water BW can be heated quickly.

<Example 1>

FIG. 6 shows the hot water supply / reheating / heating device 60 according to the first embodiment. The hot water supply / reheating / heating device 60 is an example of a heat source device using the valve unit 2. In the hot water supply / reheating / heating device 60, the same parts as those in FIG. 3 are designated by the same reference numerals.

The hot water supply / reheating / heating device 60 includes a device housing 62, and the device housing 62 is attached to a wall member or the like of a house. The device housing 62 is provided with the above-mentioned circulation paths 28-1 and 28-2. The return path 25, which is a part of the circulation path 28-1, is installed in the device housing 62. That is, the heat exchanger HM uses the heat exchanger 25 separately from the circulation path of the heat medium HM such as the high temperature heating load 54-1, the low temperature heating load 54-2, and the heating circuits 28-11 and 28-12. It is returned to the tank 50 from 26-2. In the circulation path 28-1, the temperature sensor 70-4 is on the exit side of the first heat medium heat exchange section 26-111, and the exit side of the second heat medium heat exchange section 26-112, that is, the first heat medium heat. A temperature sensor 70-5 is installed on the entrance side of the exchange unit 26-111. The temperature sensor 70-4 detects the temperature of the high-temperature heat medium HM after heat exchange, and the temperature sensor 70-5 detects the exit temperature of the second heat medium heat exchange unit 26-112, that is, the first heat medium. The temperature of the heat medium HM on the entry side of the heat exchange units 26-111 is detected.

The heat medium heat exchange section 26-111 and the bathtub water heat exchange section 26-12 are integrally configured heat exchange pipelines, and a plurality of heat absorbing fins 64 are commonly attached.

Fuel gas G is supplied to the burner 40 from the fuel supply pipe 63. A fuel control valve 52-4 is installed on the burner 40 side to control the supply and supply amount of the fuel gas G to the burner 40.

The heat medium heat exchange section 26-112 and the hot water supply heat exchange section 26-13 are secondary heat exchangers that recover the combustion exhaust EG on the downstream side, and generate a large amount of drain D. This drain D is received by the drain receiver 66, stored in the drain tank 68, and discharged according to the stored amount.

A bypass passage 34-3 is provided in the water supply passage 34-1 and the hot water supply passage 34-2, and a mixing valve 52-3 is provided on the hot water supply passage 34-2 side. A temperature sensor 70-1 and a water supply amount sensor 72-1 are provided on the water supply channel 34-1 side, and temperature sensors 70-2 and 70-3 are provided on the hot water supply channel 34-2 side. The temperature sensor 70-1 detects the temperature of the water supply W, and the temperature sensor 70-2 detects the temperature of the hot water HW immediately after the heat exchange of the heat exchanger 26-2. Further, the temperature sensor 70-3 detects the temperature of the hot water HW that has passed through the mixing valve 52-3. Therefore, when starting hot water supply, the mixing valve 52-3 is controlled by referring to the amount of water supplied, the water supply temperature, the hot water temperature immediately after heat exchange, and the hot water discharge temperature after starting hot water supply, and water is supplied to the hot water HW immediately after heat exchange. The mixing ratio of W is adjusted. As a result, hot water HW controlled to a set temperature can be discharged.

An electrical board 74 is provided, and the electrical board 74 receives a commercial AC power supply from the power supply unit 76, and a power output is supplied to the electrical board 74. The electrical board 74 is provided with a hot water supply / reheating / heating control unit 78 (FIG. 7), and remote control devices 80-1, 80-2, and 80-3 are connected to the electrical board 74.

<Control system>

FIG. 7 shows an example of the hot water supply / reheating / heating control unit 78. In the configuration shown in FIG. 7, a functional unit necessary for explaining the function as the embodiment is described, and the present invention is not limited to such a functional unit.

The hot water supply / reheating / heating control unit 78 is an example of the valve control unit 18. The hot water supply / reheating / heating control unit 78 and the remote controller devices 80-1, 80-2, 80-3 are composed of a computer, and realize the control mode described later by information processing. The processor 82 executes a program in the memory unit 84, and executes information processing necessary for controlling hot water supply, reheating, and heating, and data storage.

The memory unit 84 includes a recording medium such as a ROM (Read-Only Memory) and a RAM (Random-Access Memory), and stores a program for executing information processing necessary for control. In addition to the ROM, an EEPROM may be provided. RAM constitutes an information processing work area.

The system communication unit 86 is controlled by the processor 82, cooperates with the remote controller devices 80-1, 80-2, and 80-3 by wire or wirelessly, and executes information exchange with these remote controllers 80-1, 80-2, and 80-3.

The input / output unit (I / O) 88 takes out input information to be used for information processing of the processor 82 and control output which is a processing result. Circulation pumps 48-1, 48-2, temperature sensors 70-1, 70-2, 70-3, fuel control valve 52-4, and the like are connected to the I / O 88.

<Control mode of hot water supply / reheating / heating device 60>

The hot water supply / reheating / heating device 60 includes a hot water supply operation, a reheating operation, a heating operation, and the like, and these operations include pump rotation control (FIG. 8), burner combustion control (FIG. 9), and hot water supply control (FIG. 9). 10), tub pouring control, etc. are included.

<Pump speed control>

FIG. 8 shows a processing procedure for controlling the pump rotation speed. This processing procedure is an example of the heat exchange method of the present invention. In this pump rotation speed control, it is determined whether the reheating is independent operation (S101). In the case of reheating independent operation (YES in S101), the circulation pump 48-1 is driven at a rotation speed required to prevent boiling of the heat medium HM during reheating (S102).

If it is not the reheating independent operation (NO in S101), it is determined whether the hot water supply is independent operation or the hot water supply and reheating are operated at the same time (S103).

In the case of single operation of hot water supply or simultaneous operation of hot water supply and reheating, the amount of heat medium HM supplied to the heat exchanger 26-2 at a predetermined temperature T1 according to the amount of hot water supply, for example, T1 = 80 ° C. The circulation pump 48-1 is driven at the rotation speed required for the above (S104).

If it is other than either one or both of the hot water supply operation and the reheating operation, the circulation pump 48-1 is driven at a rotation speed corresponding to the combination of these functions (S105). That is, the rotation speed N1 in the independent operation of the high temperature heating load 54-1, the rotation speed N2 according to the number of connected terminals in the independent operation of the low temperature heating load 54-2, the high temperature heating load 54-1 and the low temperature heating load 54-2. In the case of both operations, it may be driven by the rotation speed N corresponding to the function to be used, such as the rotation speed N3. This rotation speed is changed according to the amount of hot water supply, the strength of heating, and the combination of these, and the rotation speed is adjusted according to the load.

By the above processing, the rotation speed of the circulation pump 48-1 that circulates the heat medium HM is determined, and the circulation pump 48-2 that circulates the bath water BW reaches the predetermined rotation speed when the reheating operation is performed (YES in S106). (S107) and stop (S108) when the reheating operation is not performed (NO in S106). The rotation speed of the circulation pump 48-2 may be controlled by the amount of combustion of the burner 40.

In this pump rotation speed control, the flow rate of the heat medium HM changes according to the rotation speed of the circulation pump 48-1. Feed forward control (FF control) is used to control the circulation pump 48-1, and the rotation speed is controlled according to the combination of hot water supply (large hot water supply, small hot water supply), high temperature heating, and low temperature heating (number of connected terminals). To do.

In the reheating independent operation, the heat medium HM is circulated at a predetermined rotation speed in order to prevent the heat medium HM from boiling. At this time, the heat medium HM passes through the heat exchanger 26-2 and internally circulates in the device housing 62 through the return path 25. If it is not reheating alone, the rotation speed of the circulation pump 48-1 may be set to the rotation speed according to other functions.

In hot water supply (including hot water pouring) independent operation or reheating operation at the same time as hot water supply, it is necessary for heating depending on the detection temperature of the temperature sensor 70-1 and the detection value of the water supply amount sensor 72-1 and the set temperature of hot water supply or hot water pouring. The amount of heat (number) may be calculated. For example, the rotation speed of the circulation pump 48-1 according to the flow rate of the heat medium HM of 80 [° C.] as a constant temperature is obtained, and the circulation pump 48-1 is controlled to the rotation speed. As a result, it is possible to prevent the combustion from being suspended without heating the heat medium HM more than necessary.

<Burner combustion control>

FIG. 9 shows a processing procedure for burner combustion control. This processing procedure is an example of the valve unit control method of the present invention. In this burner combustion number control, it is determined whether or not the circulation pump 48-1 is driven (S201). Assuming that the circulation pump 48-1 is being driven (YES in S201), the combustion control of the burner 40 is performed so that the detection temperature of the heat medium HM of the temperature sensor 70 becomes a constant temperature T1, for example, T1 = 80 ° C. (YES). S202).

Unless the circulation pump 48-1 is driven (NO in S201), the burner 40 is not burned (S203). That is, the heat medium HM or the bath water BW is not heated.

In this burner combustion control, the combustion amount of the burner 40 is controlled so that the heat medium HM reaches a predetermined temperature, for example, 80 [° C.] while the circulation pump 48-1 is being driven. In this case, a flow rate sensor may be installed, but since the flow rate sensor is not installed, the control condition is to drive the circulation pump 48-1 without detecting the flow rate of the heat medium HM. In this case, regardless of the flow rate of the heat medium HM flowing through the first heat medium heat exchange unit 26-111, the amount of fuel gas is adjusted so that the detection temperature of the temperature sensor 70-4 becomes a predetermined temperature, for example, 80 [° C.]. Make adjustments. If the detected temperature of the temperature sensor 70-5 is close to a predetermined temperature, combustion may be stopped.

<Hot water supply control>

FIG. 10 shows a processing procedure for hot water supply control. This processing procedure is an example of the valve unit control method of the present invention. The heat exchange between the water supply W from the water supply channel 34-1 and the heat medium HM is performed by the second heat exchanger 26-2. The hot water HW from the hot water supply channel 34-2 or the pouring of the bathtub 32 is related to the control of the mixing valve 52-3. In this hot water supply control, it is determined whether or not the hot water supply operation is performed (S301). If there is hot water supply (YES in S301), it is determined whether the bathtub pouring water is operated independently (S302).

In the case of independent operation of bathtub pouring (YES in S302), the temperature detected by the temperature sensor 70-3 should be a temperature that takes into account the heating amount by the bathtub water heat exchange unit 26-12 with respect to the set temperature T2 by the bather. In addition, the mixing valve 52-3 is controlled (S303).

If it is not the independent operation of bathtub pouring (NO in S302), it is determined whether the hot water supply is independent operation (S304). If the hot water supply is independent operation (YES in S304), the mixing valve 52-3 is controlled so that the detection temperature of the hot water HW detected by the temperature sensor 70-3 becomes the set temperature T3, and the hot water HW and the low temperature are low. The mixing ratio of the water supply W is adjusted, and the hot water HW having the set temperature T3 is discharged (S305).

If the hot water supply is not an independent operation (NO in S304), the control corresponding to the case of bathtub pouring or hot water supply is performed (S306). In this S306, control such as hot water injection priority and hot water supply priority is performed. In the hot water pouring priority, the hot water pouring operation is executed with priority over the hot water supply operation, and the temperature control is equivalent to that of the hot water pouring independent operation. In this case, the hot water supply temperature tends to be lower than the hot water supply set temperature T3. In addition, in hot water supply priority, hot water supply operation is prioritized over hot water pouring operation. When a hot water supply operation occurs during the hot water pouring operation and this hot water supply operation is executed, the hot water pouring operation is temporarily stopped.

In this hot water supply control, the presence or absence of hot water supply is detected by the water supply amount sensor 72-1. Whether or not the bathtub pouring is independent is determined by comparing the detected values of the pouring amount sensor 72-2 and the water supply amount sensor 72-1, and if there is a difference between them, the hot water supply and the hot water pouring are used at the same time. Become. In the case of pouring alone, the hot water HW that has passed through the temperature sensor 70-3 flows into the circulation path 28-2, and is poured into the bathtub 32 from the outgoing pipe 28-22 and the return pipe 28-21. When passing through the going pipe 28-22, it is heated by the bathtub water heat exchange section 26-12, so in consideration of this temperature rise, the mixing valve is set so that the temperature sensor 70-3 is lower than the bathtub set temperature. The mixing ratio of 52-3 is controlled.

In the case of hot water supply alone, the mixing valve 52-3 is controlled so that the temperature sensor 70-3 reaches the set temperature T3.

Then, when hot water pouring and hot water supply occur at the same time, control corresponding to simultaneous use is performed so that at least the detection temperature of the temperature sensor 70-3 becomes a temperature considering the simultaneous generation state of hot water pouring and hot water supply. The mixing ratio of the mixing valve 52-3 is controlled.

<Hot water supply operation>

FIG. 11 shows the flow of the heat medium HM and the water supply W during the hot water supply operation. In this hot water supply operation, the heated heat medium HM circulates to the heat exchanger 26-2 through the circulation path 28-1. As a result, heat exchange between the water supply W from the water supply channel 34-1 and the heat medium HM is performed, and the hot water HW is discharged from the hot water supply channel 34-2.

<Reheating operation>

FIG. 12 shows the flow of the bath water BW and the heat medium HM when the bath water BW is reheated. In this reheating operation, the bathtub water BW is circulated in the bathtub water heat exchange section 26-12 of the heat exchanger 26-1, and heat exchange between the bathtub water BW and the combustion exhaust EG is performed. In this case, since the combustion exhaust EG of the burner 40 flows to the heat medium heat exchange section 26-111, heat exchange between the heat medium HM and the combustion exhaust EG is inevitably performed, and boiling occurs unless the heat medium HM is circulated. May occur. Therefore, the circulation pump 48-1 is driven to circulate the heat medium HM in the circulation path 28-1.

<Heating operation>

FIG. 13 shows the flow of the heat medium HM during the heating operation. In this heating operation, the circulation pump 48-1 is driven to circulate the heat medium HM through the circulation path 28-1 and the heating circuits 28-11 and 28-12.

<Effect of Example 1>

(1) According to the hot water supply / reheating / heating device 60, the same effect as that of the heat source device 22 according to the second embodiment can be obtained.

(2) According to this hot water supply / reheating / heating device 60, it is possible to realize a hot water supply / reheating / heating device with high thermal efficiency as well as being compact.

(3) High-temperature hot water HW and low-temperature heating can be realized.

<Example 2>

FIG. 14A shows the front surface of the valve unit 2-1 according to the first embodiment. In A of FIG. 14, the same parts as those of FIG. 1 are designated by the same reference numerals. In the valve body 4 of the valve unit 2-1 the connecting portion 12 is arranged in the center, the distribution valve portion 6-1 is arranged on the right side, the mixing valve portion 6-2 is arranged on the left side, and the port 8- is arranged in the distribution valve portion 6-1. 11, 8-12, the mixing valve portion 6-2 is provided with ports 8-21, 8-22, and the connecting portion 12 is provided with ports 8-3. The valve drive unit 16-1 that drives the valve body 10-1 is located above the distribution valve unit 6-1 and the valve drive unit 16-2 that drives the valve body 10-2 is located above the mixing valve unit 6-2. It is attached. In the first embodiment, the connection portion 12 is symmetrical about the central axis of the port 8-3.

FIG. 14B shows the plane of the valve unit 2-1. Connector parts 90-1 and 90-2 are arranged on the opposite parts of the valve drive parts 16-1 and 16-2, respectively, and cables that receive drive signals (not shown) are plugged into the connector parts 90-1 and 90-2, respectively. Connected by.

A in FIG. 15 shows the right side surface of the valve unit 2-1. The left side surface of the valve unit 2-1 has the same shape as the right side surface. FIG. 15B shows the bottom surface of the valve unit 2-1. The ports 8-11, 8-21, and 8-3 have the same shape and are arranged horizontally at equal intervals. Ports 8-12 and 8-22 are arranged in the orthogonal direction as an example with respect to each port 8-11, 8-21, 8-3.

FIG. 16 shows the XVI-XVI line cross section of FIG. 14B. The valve drive unit 16-1 includes a motor for driving the valve body 10-1 and a motor drive circuit. The valve body 10-1 is rotated by the rotation of the motor, and the openings θ11 and θ12 on the ports 8-12 and 8-13 are adjusted. As a result, the distribution ratio is set for each of the ports 8-12 and 8-13.

The valve drive unit 16-2 includes a motor for driving the valve body 10-2 and a motor drive circuit. The valve body 10-2 is rotated by the rotation of the motor, and the openings θ21 and θ22 on the ports 8-22 and 8-23 are adjusted. As a result, the mixing ratio is set for each of the ports 8-22 and 8-23.

<Example 3>

FIG. 17 shows a part of the distribution valve portion 6-1 of the valve unit 2-1 according to the third embodiment cut out and disassembled. The distribution valve portion 6-1 is provided with a cylinder portion 92, and ports 8-11, 8-12, and 8-13 communicate with the cylinder portion 92, and the valve body 10-1 is rotatably installed. ing. The valve body 10-1 is formed of a tubular body and includes a closing portion 94 that blocks the passage of the fluid and a passing portion 96 that allows the passage of the fluid. Depending on the rotation position of the closing portion 94 or the passing portion 96 of the valve body 10-1 with respect to the port 8-11, the opening θ11 on the port 8-12 side and the opening θ12 on the port 8-13 side of the port 8-11. Controls the distribution ratio.

A rotary shaft 100 is installed on the ceiling portion 98 of the valve body 10-1, and a motor is attached to the rotary shaft 100 as a rotary drive source provided in the valve drive portion 16-1 via a bearing portion 102. The motor is fixed to the support plate 104 and covered with a motor cover 106.

According to such a configuration, the distribution ratio is controlled by the opening degree θ11 on the port 8-12 side and the opening degree θ12 on the port 8-13 side in the port 8-11 according to the rotation of the motor. As a result, the heat medium HM1 described above is distributed to the port 8-12 side and the port 8-13 side according to the distribution ratio.

Such a structure is the same for the mixing valve portion 6-2, and the difference is that the distribution ratio is the mixing ratio, the heat medium HM2 and the distributed heat medium HM1 are mixed, and the mixed heat medium HMn is obtained. It's just that.

Although the branch portion 14 is not provided in the third embodiment, the branch portion 14 may be provided and the port 8-3 may be provided.

<Example 4>

FIG. 18 shows the valve unit 2-2 according to the fourth embodiment. In this valve unit 2-2, the distribution valve portion 6-1 is formed upside down with respect to the valve unit 2-1 according to the second embodiment, and the mixing valve portion 6-2 is the same as that of the second embodiment. ..

As described above, the same distribution function can be obtained even if the distribution valve portion 6-1 has an upside-down structure different from that of the second embodiment, and the heat medium HM can be prevented from remaining in the distribution valve portion 6-1 depending on the mounting direction.

<Example 5>

A and B of FIG. 19 show the valve unit 2-3 according to the fifth embodiment. In the valve unit 2-3, the heat medium HM, which is the first fluid, is introduced from the ports 8-3 of the connecting portion 12 and supplied to the distribution valve portion 6-1 and the mixing valve portion 6-2. The distribution valve portion 6-1 is provided with a port 8-31 on the upper side and a port 8-32 on the lower side, and is provided with a valve drive portion 16-1 on the side surface side to drive the valve body 10-1. The opening degree θ1 on the 8-31 side and the opening degree θ2 on the port 8-32 are adjusted so that the distribution ratio can be adjusted.

In such a configuration, the heat medium HM introduced into the port 8-3 is distributed to the distribution valve section 6-1 and the mixing valve section 6-2, and in the distribution valve section 6-1 the heat medium HM is distributed according to the distribution ratio. It is distributed to ports 8-31 and 8-32.

According to such a configuration, since the heat medium HM is introduced into the connecting portion 12 from the port 8-3, the heat medium HM can be introduced from the middle between the distribution valve portion 6-1 and the mixing valve portion 6-2, and the fluid The resistance can be reduced.

According to the valve unit control method using the valve unit 2 according to the fifth embodiment, as an example, a step of flowing the first fluid and the second fluid in the circulation path, a flow dividing step of the fluid, and a step of adjusting the distribution ratio. , The process including the step of adjusting the mixing ratio can be realized by a single valve unit 2. According to this control method, in the flow dividing step, the heat medium HM1 is divided into at least two systems as the first fluid from the circulation path to the flow dividing portion. In the distribution ratio adjusting step, the distribution ratio of the distribution valve portion can be adjusted according to the set distribution ratio, and the heat medium HM1 can be distributed to at least two systems from the distribution channel. Then, in the mixing ratio adjusting step, the mixing ratio set in the distribution valve section 6-1 is adjusted, and the heat medium HM2 and the heat medium HM1 of at least one system of the distribution valve section 6-1 are set. Can be mixed according to. These processes can be realized by a single valve unit 2, and efficient flow separation, distribution and mixing can be performed.

[Other Embodiments]

a) The distribution valve section 6-1 and the mixing valve section 6-2 of the valve units 2, 2-1, 2-2, and 2-3 of the above embodiment have the same structure, and the distribution valve section 6-1 is used. It may be used as a mixing valve section, and the mixing valve section 6-2 may be used as a distribution valve section, or both may be used as a distribution valve section or a mixing valve section.

b) In the above embodiment, the bathtub water heat exchanger 26-12 is composed of a primary heat exchanger, but a secondary heat exchanger may be provided for heating the bathtub water BW.

c) The heat of the heat medium HM of the above embodiment may be used for a bathroom heater or a bathroom dryer.

As described above, the most preferable embodiment of the heat source device has been described. The present invention is not limited to the above description. Various modifications and modifications can be made by those skilled in the art based on the gist of the invention described in the claims or disclosed in the form for carrying out the invention. It goes without saying that such modifications and modifications are included in the scope of the present invention.

In the heat source device of the present invention, it is possible to improve the efficiency of distribution and mixing of the heat medium and to make the valve configuration compact, and realize an efficient heat source device, heat exchange between the heat medium and the water supply, and heating by the heat medium. can do.

2,2-1, 2-2, 2-3 Valve unit 4 Valve body 6-1 Distribution valve part 6-2 Mixing valve part 8-11, 8-12, 8-13, 8-21, 8-22, 8-23, 8-3, 8-31, 8-32 Port 10-1, 10-2 Valve body 12 Connection part 14 Branch part 16-1, 16-2 Valve drive part 18 Valve control part 22 Heat source device 25 Return Road 26-1 First heat exchanger 26-2 Second heat exchanger 26-111 First heat medium heat exchange part 26-112 Second heat medium heat exchange part 26-12 Bath water heat exchange part 26 -13 Hot water supply heat exchange section 28-1 First circulation path 28-11, 28-12 Heating circuit 28-2 Second circulation path 28-21 Return pipe 28-22 Outgoing pipe 32 Bathtub 34-1 Water supply channel 34 -2 Hot water supply path 34-3 Bypass path 40 Burner 42 Combustion chamber 44 Air supply fan 46 Exhaust holes 48-1, 48-2 Circulation pump 50 Tank 52-3 Mixing valve 52-4 Fuel control valve 54-1 High temperature heating load 54 -2 Low temperature heating load 56 Branch part 60 Hot water supply / reheating / heating device 62 Equipment housing 63 Fuel supply pipe 64 Heat absorption fin 66 Drain receiver 68 Drain tank 70-1, 70-2, 70-3, 70-4, 70 -5 Temperature sensor 72-1 Water supply amount sensor 72-2 Hot water injection amount sensor 74 Electrical board 76 Power supply unit 78 Hot water supply / reheating / heating control unit 80-1, 80-2, 80-3 Remote control device 82 Processor 84 Memory unit 86 System communication unit 88 Input / output unit (I / O))
90-1 Connector part 90-2 Connector part 92 Cylinder part 94 Blocking part 96 Passing part 98 Ceiling part 100 Rotating shaft 102 Bearing part 104 Support plate 106 Motor cover

Claims (1)

With a heat source
A circulation path that circulates the heat medium and
A heat exchange unit that receives a low-temperature heat medium from the circulation path and exchanges heat between the low-temperature heat medium and the heat of the heat source.
A valve unit that receives a high-temperature heat medium from the heat exchange section through the circulation path, distributes the high-temperature heat medium to at least two systems, mixes the low-temperature heat medium with the high-temperature heat medium, and obtains a mixed heat medium.
Equipped with a,
The valve unit
With the valve body
A distribution valve unit that receives from the heat exchange unit and distributes the high-temperature heat medium introduced into the valve body into at least two systems according to a set distribution ratio.
A mixing valve unit that mixes the low temperature heat medium with the high temperature heat medium distributed by the distribution valve unit at a set mixing ratio.
A connecting portion that connects the distribution valve portion and the mixing valve portion and supplies the high-temperature heat medium from the distribution valve portion to the mixing valve portion.
Heat source apparatus according to claim Rukoto to have a branch section for branching a portion of the high temperature thermal medium to be supplied to the mixing valve unit from said dispensing valve unit between the distribution valve unit and the mixing valve unit ..

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