JP2001241677A - Hot water heating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hot water heating device that is capable of simplifying hot water circulation channels without using the large-sized circulating pump having the low frequency of use and a maximum pump capacity, suppressing the power consumption of a circulating pump and corresponding to the extension of a branch channel easily. SOLUTION: A flow header unit 9 that is integrally provided with a connection part 6 causing a heating medium flowing in from a flow pipe 11 to flow into a branch channel 10, a circulating pump 7 and a check valve 8 is connected by the same number as the number of all branch channels to be provided integrally, and thereby a flow header part 5 is constituted. Furthermore, individual branch channels 10 are connected with each flow header unit 9, and thereby the circulating pump 7 can be small-sized. Since only the circulating pump 7 of the branch channel 10 that is preferably heated is operated, the power consumption of the circulating pump 7 can be reduced. Moreover, a new flow header unit 9 can be added and connected to the flow header part 5 even in the case of extending the branch channel 10, so the extension of the branch channel 10 can be facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water heating apparatus for circulating a heat medium heated by a heat source device through a hot water panel or a radiator to perform hot water heating.

[0002]

2. Description of the Related Art Conventionally, as a hot water heating apparatus of this type, as shown in FIG.
01, and the combustion gas and the heat medium are exchanged by the heat exchanger 1
A heat source device 103 for exchanging heat at 02 to heat a heat medium;
A circulation pump 104 for sending and circulating the heat medium heated by the heat source unit 103; a header 106 for branching the heat medium sent by the circulation pump 104 into a plurality of branch paths 105; An outgoing pipe 107 for supplying a heat medium to the header 106; a radiator 108 for heating by passing the heat medium flowing from the outgoing header 106 to the branch 105;
08 is provided in a branch 105 between the outgoing header 106 and a manual opening / closing valve 109 for opening / closing and closing a pipe of a heat medium flowing to the radiator 108 by manually opening / closing, and passing through each radiator 108 A return pipe 110 for returning the heat medium joined by the return header 110 to the heat source unit and a return pipe 111 for returning the heat medium to the heat source apparatus to form a hot water circulation path 112. Hot water heating was performed by circulating the heat medium heated by the machine 103.

The bypass pipe 113 is connected to the going pipe 107 and the return pipe 111 to form a bypass.
Further, the bypass pipe 113 has a pressure adjusting valve 1 of a type in which the valve opening is adjusted at a flow rate equal to or higher than a predetermined flow rate or a type in which the valve opening is adjusted in accordance with the pressure on the discharge side of the circulation pump 104.
14 were provided.

The return header 110 and each branch 10
5 is passed through the radiator 108 and returned to the header 11.
Each of the actuators 11 is opened and closed by an actuator 115 that opens and closes according to the temperature of the heat medium that has flowed into the actuator 11.
5 includes a controller 116 for operating and stopping the operation.
Was connected.

When the hot water heating apparatus starts a heating operation, first, when an operation switch (not shown) of the heat source unit 103 is turned on, the circulation pump 104 starts to operate, and the heat pumped by the circulation pump 104 is started. The medium starts circulation of the heat medium, returning to the heat source device 103 again through the bypass pipe 113.

Here, the heat source device 103 includes a return header 110
The temperature of the returned heat medium is detected, and when the detected temperature is equal to or lower than a predetermined temperature, the combustion operation is started.
When the temperature of the heat medium returning to the heat source device 103 after passing through the bypass pipe 113 rises and the temperature of the heat medium returning to the heat source device 103 becomes equal to or higher than a predetermined temperature, the heat source device 103 stops the combustion operation. After the heat source unit 103 stops the combustion operation,
The heated heat medium is circulated by the circulation pump 104.

[0007] In this state, when the controller 116 is operated to operate the actuator 115 in order to heat the room, the heat medium heated by the heat source device 103 does not flow to the radiator 108 until now, and all of the heat is discharged from the bypass pipe. 113
And returned to the heat source device 103 again, the temperature of the heat medium near the actuator 115 is naturally low. If the temperature is below a predetermined temperature, the actuator 115 changes from the previously closed state to the open state, thereby circulating. A part of the heated heat medium sent from the pump 104 flows from the outgoing header 106 to the radiator 108 in which the actuator 115 is opened, and the heating operation is started.

When the heating operation is started, the temperature of the room is usually low and the heat load is large. Therefore, when the heating operation is started, the temperature of the heat medium that has passed through the radiator 108 is low because the amount of heat radiated by the radiator 108 is large. However, shortly after the start of heating, the temperature in the room rises due to heat radiation of the radiator 108, and accordingly, the temperature of the heat medium that has passed through the radiator 108 also decreases less.

When the temperature of the heat medium returning to the return header 110 becomes equal to or higher than a predetermined temperature, it is determined that the indoor temperature has reached the set temperature, and the actuator 115 is changed from the open state to the closed state.
The flow of the heat medium in the branch path 105 in which the air flow is blocked is stopped, and the heat radiation by the radiator 108 is almost eliminated or extremely reduced, so that the indoor temperature gradually decreases.

When the temperature in the room decreases, the temperature in the radiator 108 installed in the room also decreases, and accordingly, the temperature of the heat medium in the branch passage 105 in which the actuator 115 is closed is also lowered. When the temperature drops below a predetermined temperature, the actuator 115 is changed from the closed state to the open state assuming that the heating operation is required,
As a result, the branch 105 where the flow of the heat medium has stopped
Then, a high-temperature heat medium flows from the heat source device 103, and the heating operation is started again.

[0011]

In this conventional apparatus, when the operation switch of the heat source unit is turned on, the circulating pump starts to operate. If the regulating valve is not provided, the actuator must be operated by operating the controller in advance, and the actuator must be in the open state instead of the closed state, or the can (not shown) in which a certain amount of the heat medium is stored. Although the heat medium is pulled out by the circulation pump and sent out, the heat medium does not flow into the can in the closed state, so the inside of the can where a certain amount of heat medium is stored becomes an abnormal negative pressure due to the suction force of the circulation pump. If the can body is damaged and the heating is completely stopped during the operation of the heat source unit, there is a danger that the circulation pump will run idle while the cutoff state is in a closed state and be damaged.

Therefore, in the conventional hot water heating apparatus, when there is no bypass pipe, the actuator is not always in the fully closed state and when the circulating pump is operated, a part of the heat medium always flows to the radiator and the heat source unit Or a pressure control valve provided in the bypass pipe that forms a bypass by connecting the going pipe and the return pipe, and in the former case, heating is started. Sometimes a cold heat medium passes through the radiator, so the radiator cools and becomes even colder.On the contrary, even if the heating is performed enough and the room temperature reaches the set temperature, the heated heat medium passes through the radiator, Further, there is a problem that the room temperature rises. In the latter case, a bypass pipe that connects the outgoing pipe and the return pipe to form a bypass path and a pressure regulating valve provided in the bypass pipe are required. Construction was also very become complex also take Shi hot water circulation path.

Further, in this conventional apparatus, a circulating pump having a performance capable of performing heating under the maximum heat load by the radiators of all the branch paths is selected and used. Even if heating is started with the maximum heat load due to
Since the heat load is reduced with the passage of time and the output of the circulation pump is reduced accordingly, the maximum capacity of the circulation pump is required only for a short time from the start of heating.

In general, heating is often performed by selecting not all branches but all branches, and in this case, the circulation pump may have an output smaller than the maximum capacity from the start of heating. In that case, the maximum capacity of the circulating pump itself may be smaller, so a large and expensive circulating pump must be installed regardless of the frequency of using the maximum capacity, and the power consumption during operation The size of the circulating pump is large, and the size of the installation space is also large. It was uneconomical in terms of terms.

Further, in the case of adding a branch passage, the circulating pumps installed up to now have insufficient capacity to perform heating at the time of the maximum heat load by the radiators of all the branch passages after the addition of the branch passage. There was a problem that the circulation pump had to be replaced with a larger one than before, and it was not possible to easily add a branch path.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and as a whole system of a hot water heating apparatus, it is possible to reduce costs by eliminating piping and parts such as bypass pipes, pressure regulating valves, and actuators. It is possible to reduce the cost of the circulating pump and the power consumption during operation by using a circulating pump with a smaller capacity than before, and to use the circulating pump that has been used so far even when adding a branch path. It is an object of the present invention to provide a hot water heating device which can be easily added by using a hot water heater.

[0017]

SUMMARY OF THE INVENTION In order to solve the above-mentioned drawbacks, the present invention focuses on this point. In particular, the present invention relates to a heat exchanger in which a combustion gas burned in a combustor and a heat medium are exchanged. A heat source device for exchanging heat with the heat source device, a forward header portion for diverting the heat medium heated by the heat source device, a forward tube for flowing the heat medium from the heat source device into the forward header portion, and heating by the heat source device A radiator that performs heating by passing the heat medium, a return header that joins the heat medium that has passed through the radiator, and a return header that passes through the heat medium that is diverted by the header portion to the radiator. In a hot water heating device that forms a hot water circulation path by a branch path to be joined and a return pipe that returns the heat medium that has been joined by the return header to a heat source device, the outgoing header section includes a heat medium that flows in from the outgoing pipe. A connection part for flowing a part or the whole to a branch road; It comprises a circulating pump that feeds the heat medium flowing into the connection section to the branch path, and a forward header unit integrally provided with a check valve that prevents the heat medium sent to the branch path from the connection section from flowing back. is there.

According to a second aspect of the present invention, in particular, in the first aspect, the outgoing header section is configured by connecting a plurality of outgoing header units and integrally formed. , And separate branch paths are connected to each other.

According to a third aspect of the present invention, in particular, the structure of the first or second aspect is such that the outgoing header unit is substantially T-shaped, and each end communicates with the inside of the connection portion. A heat medium flow path is formed, and a male portion is provided at one end of the connection portion to be inserted into an outgoing pipe or another outgoing header unit,
The other end is provided with a male part of another outgoing header unit or a female part into which a plug member for closing the end by inserting is provided, and a circulating pump and a check valve are provided at the other end, and a branch path is provided. And a load unit to be connected.

According to a fourth aspect of the present invention, the circulation pump is started and stopped by operating a controller, and the controller detects the room temperature. The operation control of the circulation pump is performed by a detection signal of a heat medium or a detection signal of a heat medium temperature detector that detects the temperature of the heat medium after passing through the radiator.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A hot water heating apparatus according to a first aspect of the present invention includes a heat source unit for exchanging heat in a heat exchanger between combustion gas combusted by a combustor and a heat medium, and heating by the heat source unit. A forward header portion for diverting the heat medium, a forward tube for allowing the heat medium to flow from the heat source device to the forward header portion, and a radiator for heating by passing the heat medium heated by the heat source device, A return header that joins the heat medium that has passed through the radiator, a branch path that joins the return header after passing the heat medium split by the header portion going to the radiator, and a heat medium that joins the return header. In a hot water heating apparatus that forms a hot water circulation path with a return pipe returning to a heat source device, the outgoing header section includes a connecting section that allows a part or all of a heat medium flowing from the outgoing pipe to flow to a branch path, and the connection section. Circulating pump that sends out the heat medium flowing into the section to the branch If, a non-return valve to prevent the heat medium backflow sent out to the branch path from the connecting portion is made of a forward header unit provided integrally.

The outgoing header unit is constituted by the outgoing header unit in which the connecting portion for flowing the heat medium flowing from the outgoing pipe into the branch passage, the circulating pump, and the check valve are integrally provided. The hot water circulation path of the heat medium is opened / closed by the start / stop of the by-pass pipe, thereby connecting the going pipe and the return pipe as in the conventional hot water heating device, and
A pressure regulating valve provided in the bypass pipe and an actuator for opening / closing the branch passage depending on the temperature of the heat medium after passing through the radiator become unnecessary, so that the hot water circulation path can be simplified and the types of piping and parts can be reduced. Things.

According to a second aspect of the present invention, the outgoing header section is integrally formed by connecting a plurality of outgoing header units, and different branch paths are connected to the respective outgoing header units. .

Then, the heat medium flowing into the outgoing header portion is diverted and flows to the outgoing header unit in which the circulating pump is operating, so that each circulating pump is connected to the branch path to which the outgoing header unit is connected. Since the pump capacity according to the heat load is sufficient, a circulating pump with a very small pump capacity is used, as compared with a conventional circulating pump for a hot water heating system, in which the total heat load of all branches is handled by a single pump. In addition, even if one circulation pump fails, only the branch to which the circulation pump is connected cannot be heated, and the other branch can be heated. As a whole, heating cannot be disabled.

According to a third aspect of the present invention, in the hot water heating apparatus, the outgoing header unit has a substantially T-shape, and each end communicates with the inside of the connecting portion to form a heat medium flow path. Has a male portion for insertion, a female portion for insertion at the other end, and a load portion having a circulation pump and a check valve at the other end.

By inserting the male portion of another outgoing header unit into the female portion of the outgoing header unit, the outgoing header unit can be easily added, and even if a branch path is later added. This eliminates the need to replace the circulating pump that has been used so far, and can easily cope with an increase in the number of branches.

Since the inserted header unit can be freely rotated around the inserted portion, it is necessary to route and connect the pipes even if the directions of the pipes in the respective branch paths are different. Therefore, the connection between the outgoing header unit and the piping of the branch path is easy, and the installation space required as the outgoing header portion can be minimized by rotating each outgoing header unit.

According to a fourth aspect of the present invention, the circulating pump of each outgoing header unit is started and stopped by operating each controller, and further, the controller detects the detection signal of the room temperature detector or the detection signal of the heat medium temperature detector. This controls the operation of the circulation pump.

By operating the controller corresponding to the branch to be heated to perform heating, the circulation pump in the branch which does not require heating does not operate, and the circulating pump to be operated can be operated by itself. Since the operation is performed according to the heat load of the connected branch, the power consumption by the circulation pump can be suppressed to the minimum required power, and the power consumption is reduced as compared with the circulation pump of the conventional hot water heating device. Is what you can do.

[0030]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A hot water heating apparatus according to the present invention will be described below with reference to an embodiment shown in the drawings. In FIG. 1, reference numeral 1 denotes a hot water storage type heat source unit according to the present embodiment, which includes a heat exchanger 3 provided in a can body 2 storing a fixed amount of a heat medium in a heat exchanger 3, and a fuel such as oil burned by a combustor 4. The heat exchange is performed by passing a combustion gas using gas as a fuel to heat the heat medium in the can 2.

Reference numeral 5 denotes an outgoing header section, which connects an outgoing header unit 9 in which a connecting section 6, a circulating pump 7 and a check valve 8 for preventing the heat medium from flowing backward are integrated. It is configured by connecting the same number as the number of the paths 10, whereby a dedicated outgoing header and a circulating pump are provided for each branch path 10. The heat medium flowing from the pipe 1 through the going pipe 11 is branched into the respective branch paths 10 by the going header section 5.

Numeral 12 denotes a radiator connected to each of the branch passages 10 for heating by passing heat through the heat medium branched and diverted by the outgoing header section 5 for heating.

Reference numeral 13 denotes a controller, which is provided separately for the circulation pump 7 of each outgoing header unit 9 and starts and stops the circulation pump 7 by operating the controller 13. A detection signal output by detecting a room temperature by a heater (not shown) or a detection signal output by detecting the temperature of the heat medium after passing through the radiator 12 by a heat medium temperature detector (not shown). By inputting, the state of the room temperature, that is, the state of the heat load is calculated from the detection signal, and the circulating pump 7 is
It controls the operation of.

Reference numeral 14 denotes a return header, which joins the heat medium whose temperature has been lowered after passing through each radiator 12 via the branch path 10, and the joined heat medium flows from the return pipe 15 to the heat source unit 1. The heat medium sent from the heat source device 1 is sent to the radiator 12 of each branch 10 at the header section 5, and the heat medium having passed through the radiator 12 and having its temperature lowered is returned. The hot water circulation path 16 is formed by merging at the return header 14 and returning to the heat source device 1 again.

Next, the structure of the outgoing header unit 9 will be described in detail. The connecting portion 6 of the outgoing header unit 9 has a T-shaped appearance and a hollow tubular cross section, and a T-shaped heat medium passage 17 through which the heat medium passes is formed by the hollow portion. .

The connecting portion 6 has a male portion 18 at one end and a female portion 19 at the other end, which are linearly penetrated, among the three T-shaped ends. Medium flow path 20 formed linearly from
A load portion 22 forming a heat medium flow path 21 at a substantially right angle is provided at a central portion thereof.

Further, a circulation pump 7 controlled by a controller 13 installed in a room or the like is integrally attached to the tip of the load section 22, and a check valve 8 is similarly provided downstream of the circulation pump 7. It is provided integrally.

The male portion 18 has a tubular outer diameter smaller than the outer diameter of the main body of the connecting portion 6 and a little smaller than the inner diameter of the going pipe 10. An elastic O-ring 24 is attached to the groove 23, and the groove 2
A bottomed stop hole 25 is formed at a position closer to the female portion 19 than at 3.

The female portion 19 has the same tubular outer diameter as the outer diameter of the connecting portion 5 main body portion, and the inner diameter of the male portion 1.
The depth of the portion slightly larger than the outer diameter of the male portion 8 and slightly larger than the outer diameter of the male portion 18 is slightly longer than the length of the male portion 18 and extends to the heat medium flow path 20 which is a hollow portion on the outer periphery near the end. A threaded hole 26 is formed therethrough.

As a member for closing the female portion 19, there is a plug member 27. The plug member 27 is composed of an insertion portion 28 and a flange portion 29. The insertion portion 28 is cylindrical and has an outer diameter of the female portion 19. The flange 29 is disk-shaped, and its outer diameter is the same as the outer diameter of the female part 19, and is slightly smaller than the inner diameter of the female part 19. The insertion part 28 is provided integrally with the insertion part 28 protruding from the center of the part 29.

Further, a mounting groove 30 is formed in the outer peripheral portion near the tip of the insertion portion 28, and an elastic O-ring 31 is mounted in the mounting groove 30. A bottomed screw receiving hole 32 is formed at a position closer to the flange 29 than to the groove 30.

In order to construct the outgoing header unit 5 with the outgoing header unit 9, first, the outgoing header unit 9 is formed at the end on the heat load side of the outgoing pipe 11 in which a threaded hole 33 is formed in the outer peripheral portion of the end. The male part 18 is inserted and connected.

At this time, the O-ring 24 at the distal end of the inserted male portion 18 is pressed against the inner circumference of the going pipe 11 and elastically deforms and comes into close contact with the inner circumference of the going pipe 11. The heated heat medium does not leak out from this connection portion, and the male part 18 inserted by the O-ring 24 being in close contact with the inner periphery of the going pipe 11 can easily be inserted into the going pipe 11.
It does not get out of the way.

When the male portion 18 is inserted into the going tube 11 until the root portion of the male portion 18 comes into contact with the end of the going tube 11, the threaded hole 33 provided near the outer periphery of the end of the going tube 11 is formed.
Since the screw holes 33 and the stop holes 25 are provided so that the hole positions of the stop holes 25 of the male portion 18 coincide with those of the stop portions 25,
When the screw 34 is screwed into the threaded hole 33 which has been threaded in a state where the hole positions match, the distal end portion of the screw 34 reaches the bottom of the stop hole 25. It cannot be pulled out from the going pipe 11 and does not come off due to the pressure of the heat medium flowing into the going header unit 9.

Then, the male portion 18 of another outgoing header unit 9 is inserted into the female portion 19 of the outgoing header unit 9 inserted into the outgoing tube 11, and another male member 18 is inserted into the outgoing tube 11. The outgoing header unit 9 is connected.

By inserting the male portion 18 of another outgoing header unit 9 into the female portion 19 of the outgoing header unit 9, the O-ring 2 at the tip of the inserted male portion 18 is inserted.
4 is pressed against the inner circumference of the inserted female portion 19 and elastically deforms and closely adheres to the inner circumference of the female portion 19, so that it has flowed into the heat medium flow path 20 of the going header unit 9 connected to the going tube 11. The heat medium does not leak out from the connection portion between the male portion 18 and the female portion 19, and the O-ring 24 comes into close contact with the inner periphery of the female portion 19, so that the inserted male portion 18 can be easily formed. Is to prevent the female portion 19 from falling off.

When the male part 18 is inserted into the female part 19 until the root part of the inserted male part 18 comes into contact with the end of the female part 19, a threaded hole 26 provided near the outer periphery of the female part 19 is formed. Since the threaded hole 26 and the stop hole 25 are provided so that the hole position of the male part 18 and the stop hole 25 coincide, the screw 35 is removed from the threaded hole 26 which is threaded in the state where the hole position coincides. When the screw is screwed, the tip of the screw 35 reaches the bottom of the stop hole 25,
Unless the screw 35 is removed, the inserted male portion 18 cannot be pulled out from the female portion 19 and does not come off due to the pressure of the heat medium flowing into the going header unit 9.

As described above, the outgoing header unit 9 is connected to the end of the outgoing pipe 11 on the heat load side, and another outgoing header unit 9 is connected to the outgoing header unit 9 so that the necessary branch path 10 is connected. After the same number of outgoing header units 9 are connected, the insertion portions 28 of the plug members 27 are inserted into the female portions 19 of the last outgoing header unit 9.

By inserting the insertion part 28 of the plug member 27 into the female part 19 of the last outgoing header unit 9, the O-ring 31 at the tip of the inserted insertion part 28 is inserted into the female part 19 in the inserted female part 19. The heat medium flowing into the heat medium flow path 20 of the last outgoing header unit 9 is connected to the insertion section 28 and the female section 19 because it is elastically deformed by being pressed by the circumference and closely adhered to the inner circumference of the female section 19. The O-ring 31 does not leak out of the
Is tightly adhered to the inner periphery of the female member 19 so that the inserted insertion portion 28 does not easily come off the female portion 19.

The flange 29 of the plug member 27 is
When the plug member 27 is inserted into the female portion 19 until it comes into contact with the end portion of the female member 9, the threaded hole 26 provided near the outer periphery of the end portion of the female portion 19 and the outer peripheral portion of the insertion portion 28 are closer to the flange portion 29 than the mounting groove 30. The screw cutting hole 26 and the screw receiving hole 32 are provided so that the hole position of the screw receiving hole 32 provided at the position of the screw hole coincides with that of the screw receiving hole 32. When the screw 36 is screwed into the screw member 2, the tip end of the screw 36 reaches the bottom of the screw receiving hole 32.
7 cannot be pulled out from the female portion 19 and does not come off due to the pressure of the heat medium flowing into the going header unit 9.

Next, the operation of the hot water heating apparatus will be described. First, when the operation switch (not shown) of the heat source unit 1 is turned on, and then one of the controllers 13 provided in each room in the room is operated to start the heating operation, the heating operation is started. The circulation pump 7 of the going header unit 9 corresponding to the controller 13 starts operating.

As a result, the heat medium in the can 2 of the heat source unit 1 flows from the heat source unit 1 into the outgoing header unit 5, and further, among the plurality of outgoing header units 9 constituting the outgoing header unit 5, the circulation pump The circulating pump 7 flows into the outgoing header unit 9 in which the radiator 7 operates, and is sent from the circulating pump 7 to the branch passage 10 in which the radiator 12 is provided.

The heat medium whose temperature has been lowered after passing through the radiator 12 passes through the return header 14 and returns from the return pipe 15 into the can body 2 of the heat medium 1. The operation of the circulation pump 7 is controlled based on the room temperature or the temperature of the heat medium that has passed through the radiator 12.

At this time, the heat source unit 1 detects the temperature of the heat medium in the can 2, the temperature of the heat medium sent out from the outgoing pipe 11, or the temperature of the heat medium returned from the return pipe 15. The combustion amount of the combustor 4 is controlled in accordance with the detected temperature.

Next, when another controller 13 performs a heating operation start operation in this state, the circulation pump 7 of the outgoing header unit 9 corresponding to the controller 13 that has started the heating operation starts operation.

As a result, the flow velocity of the heat medium flowing through the outflow pipe 11 is increased, and a larger amount of heat medium flows into the outflow header section 5 than before and flows into each of the circulation pumps 7 in which the heat medium is operating, and flows into each branch path. It is sent to 10.

When the room temperature rises by the radiator 12, the temperature drop of the heat medium passing through the heat radiator 12 becomes small, and the controller 13 is controlled based on the detection signal from the room temperature detector or the heat medium temperature detector. Is to weaken the operation of the corresponding circulating pump 7 to reduce the amount of heat dissipation by reducing the amount of heat medium passing through the radiator 12, and accordingly, the flow rate of the heat medium flowing through the going pipe 11 becomes slow. The amount of the heat medium flowing into the header portion 5 by that amount becomes smaller than before.

As described above, the outgoing header section 5 is constituted by connecting and connecting a plurality of outgoing header units 9 in which the connecting section 6, the circulating pump 7 and the check valve 8 are integrated, and further radiating heat. The branch path 10 provided with the heater 12 is individually connected to each outgoing header unit 9, so that if there is no bypass pipe in the conventional hot water heater, damage due to abnormal negative pressure inside the can at the time of restarting the heat source unit or Although the circulation pump was damaged due to idling when the heating was completely stopped during operation of the heat source unit, in the present invention, when the circulation pump 7 is operated, the hot water circulation path is always open, so even if the bypass pipe is not provided. The above problem does not occur, the bypass pipe can be omitted, the hot water circulation path can be simplified, and the function of the actuator, which is required in the conventional hot water heating device, can be reduced by the forward header unit 9 of the present invention. The actuator also becomes unnecessary because the ring pump 7 also functions as one in which it is possible to reduce the kinds of parts needed.

Since the capacity of the circulation pump 7 can be set to a value corresponding to the heat load of the branch 10 to which the circulation pump 7 is connected,
The capacity of the circulation pump 7 can be made much smaller than that of the conventional hot water heating apparatus in which the heat medium flowing through the entire hot water heating apparatus is circulated by one large circulation pump. However, the use of a circulating pump can lower the equipment cost as compared with the case of using one large circulation pump.

Further, when a heating operation is performed by selecting some of all the branch roads 10, the branch road 1 performing the heating operation is selected.
Since only the circulating pump 7 corresponding to 0 operates, the power consumption of the circulating pump 7 can be reduced as compared with the conventional hot water heating apparatus circulating by one large circulating pump.

In the case of the conventional large-sized circulation pump, a space for installing the circulation pump is required. However, in the present invention, the circulation pump 7 itself is small, and the required space may be small. The connection of the outgoing header unit 9 is made only by insertion, a plurality of stop holes 25 of the male portion 18 are provided on the outer periphery of the male portion 18, or a plurality of screw holes 26 of the female portion 19 are provided on the outer circumference of the female portion 19. Thus, the inserted header unit 9 can be freely rotated and installed around the inserted portion, so that the load portions 22 of the respective header units 9 can be moved in the direction of the pipes of the respective branch paths 10. Can be easily connected without having to route and connect pipes.

When the branch path 10 is to be added, a new header unit 9 may be added to the forward header section 5 and inserted and connected.
In the case of adding 0, it can be added simply by connecting the newly added branch path 10 to the newly connected outgoing header unit 9, and the capacity of the circulation pump is insufficient when adding the branch path 10 conventionally. Even if it is necessary to replace the circulating pump, the present invention does not require replacement of the circulating pump, and does not waste the circulating pump used so far.

In this embodiment, the connection between the male portion 18 of the outgoing header unit 9 and the outgoing pipe 11, the connection between the male portion 18 and the female portion 19 of the outgoing header unit 9, and the female portion of the outgoing header unit 9 are performed. 19 and the plug member 27,
The insertion side provided with one O-ring was inserted and connected to the other hole side, but the connection is not limited to this. For example, connection by flare connection, and threading of the inner circumference of the going pipe 11 and the female portion 19 are performed. The outer periphery of the male part 18 and the insertion part 28 of the plug member 27 may be threaded and connected by screwing together.

Further, in this embodiment, the female portion 19 is provided at the end portion which is linearly communicated with the male portion 18 of the going header unit 9; however, the present invention is not limited to this, and as shown in FIG. The load portion 22 may be provided at an end portion communicating with the straight line, or the load portion 22 may be provided at an end portion communicating with the female portion 19 in a straight line.

[0065]

As described above, according to the hot water heating apparatus of the first aspect, a heat source unit for exchanging heat in the heat exchanger between the combustion gas burned in the combustor and the heat medium, and the heat source unit An outgoing header portion for diverting the heated heat medium, an outgoing pipe for flowing the heat medium from the heat source device into the outgoing header portion, and a radiator for heating by passing the heat medium heated by the heat source device. A return header that joins the heat medium that has passed through the radiator, a branch path that passes through the heat medium diverted by the header portion to the radiator and then joins the return header, and a heat medium that joins the return header. And a return pipe for returning the heat source to the heat source device, a hot water circulation device that forms a hot water circulation path, the outgoing header section includes a connecting portion that causes a part or all of the heat medium flowing from the outgoing pipe to flow into the branch path; Circulation that sends out the heat medium flowing into the connection to the branch And a check header for integrally preventing a heat medium sent out from the connection portion to the branch path from flowing back, the hot water circulation of the heat medium by starting / stopping the circulation pump. Road is open
A bypass pipe that is closed, thereby connecting the going pipe and the return pipe as in a conventional hot water heating apparatus, a pressure regulating valve provided in the bypass pipe, and opening and closing of the branch passage by the temperature of the heat medium after passing through the radiator. This eliminates the need for an actuator for closing, simplifies the hot water circulation path, and reduces the types of piping and components.

According to the hot water heating apparatus of the present invention, the outgoing header section is integrally formed by connecting a plurality of outgoing header units, and different branch paths are connected to the respective outgoing header units. Since the heat medium that has flowed into the outgoing header portion is diverted to the outgoing header unit in which the circulating pump is operating and flows, each circulating pump responds to the heat load of the branch path to which the outgoing header unit is connected. Therefore, a circulating pump having a very small pumping capacity may be used as compared with a circulating pump of a conventional hot-water heating system, which can handle a total heat load of all branches by a single pump. 1. Even if one circulating pump fails, only the branch to which the circulating pump is connected cannot be heated, and the other branch can be heated. Are those not become impossible heating as the body.

According to the third aspect of the present invention, the outgoing header unit is substantially T-shaped, and each end communicates with the inside of the connecting portion to form a heat medium flow path. One end is provided with a male portion for insertion, the other end is provided with a female portion for insertion, and the other end is provided with a load portion having a circulation pump and a check valve. By inserting the male part of another outgoing header unit into the female part, the outgoing header unit can be easily added, and even if it becomes necessary to add a branch path later, the circulation used until now There is no need to replace the pump, and it is possible to easily cope with the addition of branch roads.

Since the inserted header unit can be freely rotated around the inserted portion, it is necessary to route and connect the pipes even if the directions of the pipes in the respective branch paths are different. Therefore, the connection between the outgoing header unit and the piping of the branch path is easy, and the installation space required as the outgoing header portion can be minimized by rotating each outgoing header unit.

According to the fourth aspect of the present invention, the circulating pump of each outgoing header unit is started and stopped by operating each controller, and the controller further detects the detection signal of the room temperature detector or the detection signal of the heat medium temperature detector. By controlling the operation of the circulation pump based on the detection signal, the controller corresponding to the branch to be heated can be operated to perform heating, thereby operating even the circulation pump in the branch that does not require heating. And the operating circulating pump also operates according to the heat load of the branch path to which it is connected, so that the power consumption by the circulating pump can be reduced to the minimum necessary power, and the conventional hot water heating device Power consumption can be reduced as compared with the conventional circulation pump.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a hot water heating apparatus to which one embodiment of the present invention is applied.

FIG. 2 is a cross-sectional view of a main part of the same header before connection.

FIG. 3 is a cross-sectional view of a main part after connection of the header unit.

FIG. 4 is a sectional view of a main part of another embodiment of the same header unit.

FIG. 5 is a schematic configuration diagram of a conventional hot water heating device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Heat source unit 3 Heat exchanger 4 Combustor 5 Outgoing header part 6 Connection part 7 Circulation pump 8 Check valve 9 Outgoing header unit 10 Branch path 11 Outgoing pipe 12 Radiator 14 Return header 15 Return pipe 16 Hot water circulation path

Claims (4)

[Claims] 1. A heat source device for exchanging heat in a heat exchanger between combustion gas combusted by a combustor and a heat medium, a forward header portion for diverting a heat medium heated by the heat source device, A going pipe for allowing a heat medium to flow from the heat source device to the header portion, a radiator through which the heat medium heated by the heat source device passes for heating, and a return header for joining the heat medium that has passed through the radiator. A hot water circulation path is formed by a branch path that passes through the heat medium diverted by the header section to the radiator and then joins the return header, and a return pipe that returns the heat medium joined by the return header to the heat source device. In the hot water heating apparatus, the outgoing header portion includes a connection portion that allows a part or all of the heat medium flowing from the outflow pipe to flow into the branch passage, and a circulation pump that sends out the heat medium flowing into the connection portion to the branch passage. Heat medium sent out from the connection portion to the branch path A hot water heating device comprising a going header unit integrally provided with a check valve for preventing a body from flowing backward. 2. The outgoing header section is characterized in that a plurality of outgoing header units are connected and integrally formed, and each outgoing header unit is connected to a separate branch path. The hot water heating device according to claim 1. 3. The outgoing header unit is substantially T-shaped,
Inside the connection part, a heat medium flow path is formed by communicating with each end, and a male part to be inserted into an outgoing pipe or another outgoing header unit is provided at one end of the connecting part, and the other end is provided at the other end. A male part of another outgoing header unit or a female part into which a plug member for closing the end part is inserted is provided, and a circulating pump and a check valve are provided at the other end, and a load connected to the branch path is provided. The hot water heating apparatus according to claim 1 or 2, further comprising a unit. 4. The circulation pump is started and stopped by an operation of a controller, and the controller detects a detection signal of a room temperature detector for detecting a room temperature or a heat medium for detecting a temperature of the heat medium after passing through a radiator. 3. The hot water heating apparatus according to claim 1, wherein the operation of the circulation pump is controlled by a detection signal of the temperature detector.