JP2019158336A - Heat source device - Google Patents

Abstract

To improve processing such as distribution or mixing for fluid such as high/low temperature heat medium, to simplify a circulation passage for fluid.SOLUTION: A heat source device comprises: a heat source (burner 40); a circulation passage (28-1) for circulating a heat medium; heat exchange units (heat medium heat exchange units 26-111, 26-112) configured to receive a low-temperature heat medium (HM2) from the circulation passage, to exchange heat between the low-temperature heat medium and the heat source; and a valve unit (2) that receives high-temperature heat media (HM, HM1) from the heat exchange units through the circulation passage to distribute the high-temperature heat media to at least two systems, and mixes the low-temperature heat medium with the high-temperature heat media to obtain a mixed heat medium.SELECTED DRAWING: Figure 2

Description

The present invention relates to a heat source device using a valve used for, for example, mixing or distribution of a heat medium that performs hot water supply, bath water replenishment, heating, and the like.

In a 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. A heat exchanger for reheating to exchange heat with is provided. In addition to a heating medium that uses combustion heat, a heating medium that is heated by combustion heat is used in addition to a heating medium. (For example, Patent Document 1).

JP 2007-187419 A

  For example, if the heating medium is heated without installing a heat exchanger for hot water supply heated by the combustion heat, the combustion heat source part is made compact, and the combustion heat of the burner and the heating medium are exchanged. Hot water supply by exchanging heat and feed water maintains the heating medium at a constant temperature, for example, 80 [° C], and the heat of this heating medium can be exchanged with the feed water, thus avoiding the influence of temperature changes in combustion heat This has the advantage of stabilizing the hot water characteristics.

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

  Thus, when each of the supply of the low-temperature heating medium to the low-temperature heating load, the supply of the high-temperature heating medium to the high-temperature heating load, and the supply of the high-temperature heating medium that exchanges heat with feed water is realized with a single heating medium, Therefore, there is a problem that the circuit form and the switching circuit are complicated. If the fluid circuit becomes complicated, not only will the equipment cost increase, but there will be a problem that the installation cost for installing the heating circuit in the existing heat source device also increases.

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

  In order to achieve the above object, according to one aspect of the heat source apparatus of the present invention, a heat source, a circulation path for circulating the heating medium, a low-temperature heating medium from the circulation path, and the heat of the low-temperature heating medium and the heat source are received. A heat exchanging part for exchanging heat and a high temperature heat medium from the heat exchanging part by the circulation path and distributing the high temperature heat medium to at least two systems, and mixing the low temperature heat medium with the high temperature heat medium, And a valve unit for obtaining a mixed heat medium.

  In the heat source device, the valve unit includes a valve main body and a distribution valve section that distributes the high-temperature heat medium received from the heat exchange section and introduced into the valve main body into at least two systems according to a set distribution ratio. A mixing valve unit that mixes the low temperature heating medium with the high temperature heating medium distributed by the distribution valve unit at a set mixing ratio, the distribution valve unit and the mixing valve unit are connected, and the distribution valve unit And a connecting part that supplies the high-temperature heat medium from to the mixing valve part.

In the heat source device, the valve main body includes a branching portion that branches a part of the high-temperature heat medium supplied from the distribution valve unit to the mixing valve unit between the distribution valve unit and the mixing valve unit. Good.

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

  (1) Since the first fluid can be distributed and the first and second fluids can be mixed with at least a single valve unit, the fluid circulation path can be simplified, the processing of distribution and mixing can be made more efficient, and the heat medium, etc. The fluid circulation path can be simplified.

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

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

(4) Since the valve unit includes the distribution valve portion and the mixing valve portion, the processing and circuit system necessary 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 | movement of a heat-source apparatus. It is a figure which shows the chasing operation | movement 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, and heating apparatus which concern on Example 1. FIG. It is a figure which shows a control system. It is a flowchart which shows circulation pump control. It is a flowchart which shows burner combustion control. It is a flowchart which shows hot water supply control. It is a figure which shows the hot_water | molten_metal supply operation | movement of a hot-water supply, reheating, and heating apparatus. It is a figure which shows the chasing operation | movement of a hot water supply, chasing, and heating apparatus. It is a figure which shows the heating operation | movement of a hot-water supply, reheating, and heating apparatus. It is a figure which shows the front and plane of the valve unit which concerns on Example 2. FIG. It is a figure which shows the side surface and bottom face of a valve unit. It is a figure which shows the XVI-XVI line cross section of B of FIG. It is the disassembled perspective view which notched and showed a part of 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. FIG.

[First Embodiment]

  FIG. 1 shows an example of a 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, the high-temperature heat medium HM1 as the first fluid at the port 8-11, and at least two systems such as the port 8-12 according to the set distribution ratio of the heat medium HM1. , Distributed to ports 8-13. As an example, the distribution valve portion 6-1 is provided with a valve body 10-1 so that the valve body 10-1 can rotate. According to the rotation of the valve body 10-1, the opening degree θ11 on the port 8-12 side, the port 8- The opening degree θ12 on the 13th side is adjusted, and thereby the distribution ratio is controlled.

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

  As an example, the mixing valve section 6-2 is provided with a valve body 10-2 so that the valve body 10-2 can rotate. According to the rotation of the valve body 10-2, the opening degree θ21 on the port 8-22 side, the port 8- The opening degree θ22 on the 23rd side is adjusted, and thereby the mixing ratio is controlled.

  In this embodiment, the distribution valve unit 6-1 and the mixing valve unit 6-2 are connected by the connecting unit 12 between the port 8-13 and the port 8-23. The connecting portion 12 is provided with a branching portion 14, and the branching portion 14 is provided with a port 8-3. In this example, the high-temperature heating medium HM1 that is the first fluid flows out from the port 8-3.

  Valve drivers 16-1 and 16-2 are used to control the distribution ratio and the mixing ratio. Each valve drive unit 16-1, 16-2 is 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 each of the valve driving 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, a high-temperature heating medium HM1 with a constant flow rate is assumed. 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 section 6-1 are set to θ11 = θ12, for example, the heat on the port 8-12 side and the port 8-13 side 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 flows through the port 8-13 as well.

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

In this example, if the flow rate of each port 8-11, 8-12, 8-13, 8-3, 8-23 is Q1, Q2, Q3, Q4, Q5,
Q1 = Q2 + Q3 (2)
Q3 = Q4 + Q5 (3)
It becomes.

  B) Mixing control

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

Assuming that the temperature of the heating medium HM1 is T1 and the temperature of the heating medium HM2 is T2, the temperature Tn of the heating medium HMn mixed in the mixing valve section 6-2 is the flow rate Q5, Q6 of the heating medium HM1 and HM2 mixed. It is obtained from each temperature T1, T2.
Tn = (T1 × Q5 + T2 × Q6) / (Q5 + Q6) (5)

In this case, if the temperatures T1 and T2 of the heating media HM1 and HM2 are, for example, T1 = 80 [° C.] and T2 = 40 [° C.], for example, 80 to 40 [° C.] is obtained as the temperature Tn, , 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 the heat medium HM1 and mix it. In the valve part 6-2, the heat medium HM2 can be mixed with the heat medium HM1 distributed by the distribution valve part 6-1, and the heat medium HMn mixed at a desired temperature can be obtained.

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

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

  (4) It can be used for distribution and mixing of heating media used for hot water supply, bath water replenishment, heating, etc., and the distribution and mixing processes can be speeded up. Hot dashing that speeds up the temperature rise of HMn can be achieved.

  (5) In the valve unit 2, the distribution fluid of the distribution valve section 6-1 and the mixed fluid of the mixing valve section 6-2 can be insulated to perform the respective processes.

  (6) According to the valve unit control method using the valve unit 2, as an example, the first and second fluids are poured into the valve unit 2, the distribution ratio adjusting process, and the mixing ratio adjusting process, Distribution and mixing can be realized with a single valve unit 2. According to this control method, in the distribution ratio adjustment step, the distribution ratio set in the distribution valve section 6-1 is adjusted, the heat medium HM1 is received as the first fluid from the circulation path, and the distribution valve section 6-1. Can be distributed to at least two systems in accordance with the distribution ratio set to. Further, in the mixing ratio adjustment step, the mixing ratio of the mixing valve section 6-2 is adjusted, and at least one heating medium HM1 of the distribution valve section 6-1 is set to the set mixing ratio of the mixing valve section 6-2. Can be mixed accordingly. Accordingly, fluid distribution and mixing can be performed efficiently and quickly by the single valve unit 2.

[Second Embodiment]

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

  The combustion chamber 42 is provided with a first heat exchanger 26-1, and the heat exchanger 26-1 includes a first heat medium heat exchange unit 26-111 and a second heat medium heat exchange unit 26-112. , A bath water heat exchanging unit 26-12 and a hot water supply heat exchanging unit 26-13 are provided. The heat medium heat exchange unit 26-111 and the bath water heat exchange unit 26-12 that recover the heat of the combustion exhaust gas EG on the upstream side are primary heat exchangers, and the heat medium heat exchange unit 26-112 and the hot water supply heat exchange unit 26-13 is a secondary heat exchanger which collect | recovers the heat | fever of the combustion exhaust of the downstream after the heat exchange by a 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 part 6-1, the mixing valve part 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 the circulation pump 48-1, and the low-temperature heat from any one or combination of the heat exchanger 26-2, the high temperature heating load 54-1 and the low temperature heating load 54-2 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 exchanging unit 26-112, then branched by the branching unit 56, circulated to the heat medium heat exchanging unit 26-111, and heated to a high temperature. 6-1. In the distribution valve unit 6-1, the high-temperature heat medium HM is distributed to the heat exchanger 26-2 side and the branch unit 14 side.

  The heat medium HM circulating in the heat exchanger 26-2 is used for heat exchange with the feed water W side. The heat medium HM that passes through the heat exchanger 26-2 and has a low temperature 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 the 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.

  In the branch part 14, the high-temperature heat medium HM is distributed to the mixing valve part 6-2 and the heating circuit 28-11 side. The heat medium HM distributed to the heating circuit 28-11 side is radiated by the high-temperature heating load 54-1, and is used for heating. As a result, the heat medium HM having a reduced temperature is returned to the tank 50 and stored.

  The heat medium HM distributed to the mixing valve section 6-2 is mixed with the heat medium HM preheated by the heat medium heat exchange section 26-112 having a low temperature thereby, and the heat medium HM having the mixed temperature is heated. Circulate to circuit 28-12. In the heating circuit 28-12, the circulating heat medium HM is radiated by the low-temperature heating load 54-2 and used for heating. As a result, the heat medium HM having a reduced temperature is returned to the tank 50 and stored.

  The bathtub water heat exchanger 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 is circulated from the return pipe 28-21 to the bathtub water heat exchanger 26-12, and from the bathtub water heat exchanger 26-12 to the bathtub 32 by the forward pipe 28-22. Returned.

  In this embodiment, a hot water supply heat exchanging section 26-13 is connected to the water supply path 34-1. Therefore, the water supply W is preheated by the hot water supply heat exchanging section 26-13 and then heat exchange with the heat medium HM is performed by the heat exchanger 26-2. Thereby, the hot water 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 feed water W is performed.

<Pursuit operation>

  FIG. 4 shows the chasing operation of the heat source device 22. In this chasing operation, the circulation pump 48-2 is driven and the bathtub water BW is circulated through the circulation path 28-2. In 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 to avoid boiling of the heat transfer medium HM due to heat exchange between the heat transfer medium HM and the combustion exhaust EG. The heating 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 heating medium HM is circulated through the circulation path 28-1, the high temperature heating medium HM distributed by the distribution valve portion 6-1 of the valve unit 2 is caused to flow to the heating circuit 28-11, and the high temperature heating load 54 is obtained. Cycle to -1. Further, the high-temperature heat medium HM and the low-temperature heat medium HM distributed by the distribution valve unit 6-1 are mixed by the mixing valve unit 6-2 and flown to the heating circuit 28-12, and are supplied to the low-temperature heating load 54-2. Circulate.

<Effects of Second Embodiment>

  (1) The heat exchanger 26-1 is integrated with the heat medium heat exchanging units 26-111 and 26-112, the bath water heat exchanging unit 26-12, and the hot water supply heat exchanging unit 26-13 to form a single heat exchange. The heat source device 22 can be downsized together with the compact heat exchanger.

  (2) In the heat exchanger 26-1, the combustion exhaust EG of the single burner 40 is caused to act on a plurality of heat exchanging portions, so that the combustion heat can be used efficiently.

  (3) Conventionally, the liquid-to-liquid heat exchanger that has been used for heating the bath water BW can be omitted, and the cost and the size can be reduced.

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

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

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

(7) The bath water heat exchange section 26-12 included in the heat exchanger 26-1 can directly receive the combustion heat from the combustion exhaust EG in pursuit of the bath water BW. Can be increased. That is, the bathtub water BW can be heated quickly.

<Example 1>

  FIG. 6 shows a 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 this hot water supply / reheating / heating apparatus 60, the same parts as those in FIG.

  The hot water supply / reheating / heating apparatus 60 includes an apparatus housing 62, which is attached to a wall member of a house. The apparatus housing 62 is provided with the above-described circulation paths 28-1 and 28-2. The return path 25 that is a part of the circulation path 28-1 is installed in the apparatus housing 62. That is, the heating medium HM uses the return path 25 separately from the circulation path of the heating 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. Return to tank 50 from 26-2. The circulation path 28-1 has a temperature sensor 70-4 on the exit side of the first heat medium heat exchange unit 26-111 and an exit side of the second heat medium heat exchange unit 26-112, that is, the first heat medium heat. A temperature sensor 70-5 is installed on the entry side of the replacement 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 outlet temperature of the second heat medium heat exchanger 26-112, that is, the first heat medium. The temperature of the heat medium HM on the entry side of the heat exchange unit 26-111 is detected.

  The heat-medium heat exchange unit 26-111 and the bath water heat exchange unit 26-12 are integrally configured heat exchange pipes, and a plurality of heat-absorbing fins 64 are attached in common.

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

  The heat medium heat exchange unit 26-112 and the hot water supply heat exchange unit 26-13 are secondary heat exchangers that collect the combustion exhaust EG on the downstream side, and generate a large amount of drain D. The drain D is received by the drain receiver 66, stored in the drain tank 68, and discharged according to the storage 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, a water supply amount sensor 72-1, and temperature sensors 70-2, 70-3 are provided on the side of the water supply passage 34-1 and on the side of the hot water supply passage 34-2. The temperature sensor 70-1 detects the temperature of the feed water 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. 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 the hot water supply, the water supply amount, the water supply temperature, the hot water temperature immediately after the heat exchange, the hot water supply, the hot water temperature is referred to, the mixing valve 52-3 is controlled, and the hot water HW immediately after the heat exchange is supplied with water. The mixing ratio of W is adjusted. Thereby, the hot water HW controlled to preset temperature can be discharged.

  An electrical board 74 is provided. The electrical board 74 receives a commercial AC power supply by a power supply unit 76 and is supplied with a power output. 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, 80-3 are connected thereto.

<Control system>

  FIG. 7 shows an example of the hot water supply / reheating / heating control unit 78. In the configuration shown in FIG. 7, functional units necessary for describing the functions as the embodiment are described, and the functional units are not limited to such functional units.

  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 control devices 80-1, 80-2, 80-3 are configured by a computer and realize a 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. An EEPROM may be provided in addition to the ROM. The RAM constitutes a work area for information processing.

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

  The input / output unit (I / O) 88 extracts input information used for information processing of the processor 82 and control output as a processing result. Circulation pumps 48-1, 48-2, temperature sensors 70-1, 70-2, 70-3, a 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 apparatus 60 includes a hot water supply operation, a reheating operation, a heating operation, and the like. These operations include pump rotation control (FIG. 8), burner combustion control (FIG. 9), and hot water supply control (FIG. 10), bath pouring control and the like are included.

<Pump speed control>

  FIG. 8 shows a processing procedure for pump rotation speed control. 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 or not it is a chasing single operation (S101). If it is a chasing single operation (YES in S101), the circulation pump 48-1 is driven at a rotational speed necessary for preventing boiling of the heating medium HM being chased (S102).

  If it is not a chasing independent operation (NO in S101), it is determined whether it is a hot water solitary operation or simultaneous operation of hot water supply and chasing (S103).

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

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

  With the above processing, the rotation speed of the circulation pump 48-1 for circulating the heat medium HM is determined, and the circulation pump 48-2 for circulating the bath water BW is set to a predetermined rotation speed when performing a reheating operation (YES in S106). (S107), and when the follow-up operation is not performed (NO in S106), the operation is stopped (S108). The rotational speed of the circulation pump 48-2 may be controlled by the combustion amount of the burner 40.

  In this pump rotation speed control, the flow rate of the heating medium HM changes according to the rotation speed of the circulation pump 48-1. The feed forward control (FF control) is used for the control of 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 follow-up single operation, the heat medium HM is circulated at a predetermined rotational speed to prevent the heat medium HM from boiling. At this time, the heat medium HM passes through the heat exchanger 26-2 and performs internal circulation in the apparatus housing 62 through the return path 25. If it is not a chasing alone, the rotation speed of the circulation pump 48-1 may be set to a rotation speed adapted to other functions.

  In hot water supply (including pouring) single operation or reheating operation simultaneously with hot water supply, heating is necessary depending on the detected temperature of the temperature sensor 70-1, the detected value of the water supply amount sensor 72-1, and the set temperature of the hot water or pouring water. What is necessary is just to calculate a calorie | heat amount (number). For example, the number of rotations of the circulation pump 48-1 corresponding to the flow rate of the heating medium HM of 80 [° C.] is obtained as a constant temperature, and the circulation pump 48-1 is controlled to the number of rotations. Thereby, the temporary stop of combustion etc. can be prevented, without heating the heating 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 the circulation pump 48-1 is driven (S201). If the circulation pump 48-1 is driven (YES in S201), the combustion control of the burner 40 is performed so that the detected temperature of the heat medium HM of the temperature sensor 70 is a constant temperature T1, for example, T1 = 80 ° C. ( S202).

  If the circulation pump 48-1 is not 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 heating medium HM reaches a predetermined temperature, for example, 80 [° C.] while the circulation pump 48-1 is driven. In this case, although a flow sensor may be installed, since the flow sensor is not installed, the driving of the circulation pump 48-1 is set as a control condition without detecting the flow rate of the heating medium HM. In this case, regardless of the flow rate of the heat medium HM flowing through the first heat medium heat exchanger 26-111, the amount of fuel gas is adjusted so that the temperature detected by the temperature sensor 70-4 becomes a predetermined temperature, for example, 80 [° C.]. Make adjustments. When the temperature detected by the temperature sensor 70-5 is close to a predetermined temperature, combustion may be stopped.

<Hot water 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. Heat exchange between the water supply W from the water supply path 34-1 and the heat medium HM is performed in the second heat exchanger 26-2. Hot water HW tapping from the hot water supply path 34-2 or 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 it is a hot water supply operation (S301). If there is hot water supply (YES in S301), it is determined whether the operation is independent of bathtub pouring (S302).

  If it is an independent operation of bath pouring (YES in S302), the temperature detected by the temperature sensor 70-3 is set to a temperature that takes into account the amount of heating by the bath water heat exchanger 26-12 with respect to the set temperature T2 by the bather. Next, the mixing valve 52-3 is controlled (S303).

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

  If it is not a single hot water supply operation (NO in S304), control corresponding to the case of bath pouring or hot water supply is performed (S306). In this S306, control such as pouring priority and hot water priority is performed. In the pouring priority, the pouring operation is executed in preference to the hot water supply operation, and the temperature control is equivalent to that of the single pouring operation. In this case, the hot water temperature tends to be lower than the hot water set temperature T3. In hot water supply priority, the hot water supply operation is given priority over the pouring operation. When a hot water supply operation occurs during the pouring operation and this hot water supply operation is executed, the hot water operation is temporarily stopped.

  In this hot water supply control, the presence or absence of hot water supply is detected by a water supply amount sensor 72-1. Whether or not the bath pouring is used alone is determined by comparing the detection 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 simultaneous use of hot water and pouring water is used. 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 forward pipe 28-22 and the return pipe 28-21. When passing through the forward pipe 28-22, the bathtub water heat exchanger 26-12 is heated, so that this temperature rise is taken into consideration so that the temperature sensor 70-3 has a temperature lower than the bathtub set temperature. Control the mixing ratio of 52-3.

  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.

  And when pouring and hot water supply occur simultaneously, control corresponding to simultaneous use is performed, and at least the temperature detected by the temperature sensor 70-3 is such that the temperature of pouring and hot water takes into account the simultaneous occurrence state. 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 is circulated 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 path 34-1 and the heat medium HM is performed, and the hot water HW is discharged from the hot water supply path 34-2.

<Pursuit operation>

  FIG. 12 shows the flow of the bathtub water BW and the heating medium HM when the bathtub water BW is replenished. In this reheating operation, the bathtub water BW is circulated through the bathtub water heat exchanger 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 unit 26-111, heat exchange between the heat medium HM and the combustion exhaust EG is inevitably performed, and boiling does not occur 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, 28-12.

<Effect of Example 1>

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

  (2) According to the 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 compactness.

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

<Example 2>

  FIG. 14A shows the front of the valve unit 2-1 according to the first embodiment. In FIG. 14A, the same parts as those in FIG. In the valve body 4 of the valve unit 2-1, a connecting portion 12 is arranged in the center, a distribution valve portion 6-1 on the right side, and a mixing valve portion 6-2 on the left side. 11, 8-12, the mixing valve section 6-2 is provided with ports 8-21 and 8-22, and the connecting section 12 is provided with a port 8-3. A valve driving unit 16-1 for driving the valve body 10-1 is provided above the distribution valve unit 6-1, and a valve driving unit 16-2 for driving the valve body 10-2 is provided above the mixing valve unit 6-2. It is attached. In the first embodiment, the connecting portion 12 is symmetrical about the central axis of the port 8-3.

  FIG. 14B shows a plane of the valve unit 2-1. Connector portions 90-1 and 90-2 are respectively arranged at the opposing portions of the valve drive portions 16-1 and 16-2, and cables for receiving drive signals (not shown) are plugged into the connector portions 90-1 and 90-2. Connected by.

  FIG. 15A 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 this 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 horizontally arranged at equal intervals. As an example, the ports 8-12 and 8-22 are arranged in the orthogonal direction with respect to the ports 8-11, 8-21, and 8-3.

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

  The valve drive unit 16-2 includes a motor and a motor drive circuit that drive the valve body 10-2. The valve body 10-2 is rotated by the rotation of the motor, and the opening degrees θ21 and θ22 on the ports 8-22 and 8-23 side are adjusted. As a result, a 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 by cutting away and disassembling. The distribution valve portion 6-1 includes a cylinder portion 92. 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 cylindrical body, and includes a closing portion 94 that blocks passage of fluid and a passage portion 96 that allows passage of fluid. The opening degree θ11 on the port 8-12 side in the port 8-11 and the opening degree θ12 on the port 8-13 side in the port 8-11 depending on the rotation position of the closing portion 94 or the passage portion 96 of the valve body 10-1 with respect to the port 8-11. The distribution ratio is controlled by.

  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 rotational drive source provided in the valve drive portion 16-1 via a bearing portion 102. This 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. Thereby, the above-described heating medium HM1 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 section 6-2, and the difference is that the distribution ratio is the mixing ratio, and the heat medium HM2 and the distributed heat medium HM1 are mixed to obtain the mixed heat medium HMn. Only.

  In addition, although the branch part 14 is not provided in this Example 3, the branch part 14 may be provided and the port 8-3 may be provided.

<Example 4>

  FIG. 18 illustrates a valve unit 2-2 according to the fourth embodiment. In the valve unit 2-2, the distribution valve unit 6-1 is vertically inverted with respect to the valve unit 2-1 according to the second example, and the mixing valve unit 6-2 is the same as that of the second example. .

  Thus, even if the distribution valve unit 6-1 has a vertically inverted structure different from that of the second embodiment, a similar distribution function can be obtained, and the heat medium HM remaining in the distribution valve unit 6-1 due to the mounting direction can be prevented.

<Example 5>

  FIGS. 19A and 19B show a valve unit 2-3 according to the fifth embodiment. In this valve unit 2-3, the heat medium HM, which is the first fluid, is introduced from the port 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 a valve driving portion 16-1 on the side surface side, thereby driving the valve body 10-1 to provide a port. By adjusting the opening degree θ1 on the 8-31 side and the opening degree θ2 of the port 8-32, 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 unit 6-1 and the mixing valve unit 6-2, and the heat medium HM is distributed according to the distribution ratio in the distribution valve unit 6-1. Are distributed to the ports 8-31 and 8-32.

  According to such a configuration, since the heating medium HM is introduced from the port 8-3 to the connecting portion 12, it is possible to introduce the heating medium HM from the middle of the distribution valve portion 6-1 and the mixing valve portion 6-2. 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 through the circulation path, a step of dividing the fluid, and a step of adjusting the distribution ratio The processing including the adjusting step of the mixing ratio can be realized by the single valve unit 2. According to this control method, in the branching step, the heat medium HM1 is split into at least two systems as the first fluid from the circulation path to the branching section. In the distribution ratio adjustment step, the distribution ratio of the distribution valve unit is adjusted according to the set distribution ratio, and the heating medium HM1 can be distributed to at least two systems from the distribution channel. And in the adjustment process of a mixing ratio, the mixing ratio set to the distribution valve part 6-1 is adjusted, and the mixing ratio in which the heat medium HM2 and the heat medium HM1 of at least one system of the distribution valve part 6-1 are set is set. Can be mixed according to These processes can be realized by the single valve unit 2 and can be efficiently divided, distributed and mixed.

[Other Embodiments]

  a) Each of the distribution valve portions 6-1 and the mixing valve portion 6-2 of the valve units 2, 2-1, 2-2, and 2-3 of the above embodiment has the same structure. It may be used as a mixing valve part, and the mixing valve part 6-2 may be used as a distribution valve part, or both may be used as a distribution valve part or a mixing valve part.

  b) In the above-described embodiment, the bathtub water heat exchanging unit 26-12 is configured by a primary heat exchanger, but may be configured to include a secondary heat exchanger for heating the bathtub water BW.

  c) You may use the heat of the heat medium HM of the said embodiment for bathroom heating or a bathroom dryer.

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

In the heat source device of the present invention, the distribution and mixing efficiency of the heat medium can be improved, and the valve configuration can be made compact, and heat exchange between the heat source device and the heat medium and water supply and heating by the heat medium are realized. can do.

2, 2-1, 2-2, 2-3 Valve unit 4 Valve body 6-1 Distribution valve section 6-2 Mixing valve section 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 Connecting part 14 Branching part 16-1, 16-2 Valve drive part 18 Valve control part 22 Heat source device 25 Feedback Path 26-1 First heat exchanger 26-2 Second heat exchanger 26-111 First heat medium heat exchange unit 26-112 Second heat medium heat exchange unit 26-12 Bath water heat exchange unit 26 -13 Heat exchange section for hot water supply 28-1 First circulation path 28-11, 28-12 Heating circuit 28-2 Second circulation path 28-21 Return pipe 28-22 Outward pipe 32 Bathtub 34-1 Water supply path 34 -2 Hot water supply path 34-3 Bypass path 40 Burner 42 Combustion chamber 44 Air supply fan 6 Exhaust holes 48-1, 48-2 Circulating 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 Branching portion 60 Hot water supply / reheating / heating device 62 device Case 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 supply amount sensor 74 Electrical equipment Substrate 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 (3)

A heat source,
A circulation path for circulating the heat medium;
A heat exchange section 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 the 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;
A heat source device comprising: The valve unit is
A valve body;
A distribution valve section that distributes the high-temperature heat medium received from the heat exchange section and 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;
Connecting the distribution valve unit and the mixing valve unit, and supplying the high-temperature heat medium from the distribution valve unit to the mixing valve unit;
The heat source device according to claim 1, comprising: The said valve main body is provided with the branch part which branches a part of said high temperature heating medium supplied to the said mixing valve part from the said distribution valve part between the said distribution valve part and the said mixing valve part. Item 3. The valve unit according to Item 2.

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