JP2007247940A - Hot water branching unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hot water branching unit 1 of high durability by remedying aged deterioration of sealability of each of connecting portions of hot water hoses 140, 141, 150, 151 and a fan-convector 2 to the hot water branching unit 1, a hot water flow channel portion in the hot water branching unit 1, and the like. <P>SOLUTION: This hot water branching unit comprises a main flow channel 52 for going passage, in which the hot water from a heat source unit flows, branch flow channels 53, 54 for a plurality of going passages, branched from a downstream end of the main flow channel 52 for going-way and independently supplying hot water to a plurality of terminal units 2, 14 for radiation, branch flow channels 58, 59 for a plurality of returning passage, to which hot water returning from the terminal units 2, 14 for radiation flows, and a main flow channel 57 for a returning passage, extending from a joining point of downstream ends of the branch flow channels 58, 59 for returning passages and returning the hot water to the heat source unit 3, and the branch flow channels 53, 54 for going passages are respectively provided with electric opening/closing valves 55, 56 of which the opening and closing can be controlled. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a hot water branching unit that distributes hot water heated and generated by a heat source device to a fan convector for hot air heating, a hot water mat for floor heating, or the like.

As this type of warm water branching unit, ones having the structures shown in FIGS. 5 and 6 are known (see Patent Document 1).
The hot water branching unit (1) shown in the figure is attached to the back of the fan convector (2), and in the flat rectangular box-shaped casing (10), the hot water is directed from right to left in FIG. A return pipe (11) for flowing warm water and a return pipe (12) for flowing hot water in the opposite direction are provided in parallel. In the middle of the pipes (11) and (12), pipe connection parts (110) and (120) connected to the flow path to the heat exchanger for heat dissipation (not shown) in the fan convector (2) are formed. In addition, a manual flow rate adjusting valve (13) is disposed in the vicinity of the downstream end of the forward pipe (11).

  As shown in FIG. 5, the hot water hoses (140) (141) connected to the hot water mat (14) are connected to the ends of the pipes (11) (12) on the flow rate control valve (13) side of the hot water branching unit (1). Hot water hoses (150) and (151) extending from the hot water plug (15) are connected to the other ends of the pipes (11) and (12). The hot water plug (15) is detachably connected to a hot water outlet (not shown) provided on the wall surface of the room, and an outdoor heat source device (not shown) piped to the hot water outlet. Is supplied by a circulation pump in the heat source device.

  In this case, when a warm water plug (15) is connected to a warm water outlet (not shown) disposed on the wall surface of the room to start the heating operation, the hot water generated by the heat source device is heated to about 80 ° C. Is supplied to the hot water plug (15) via the hot water outlet, and the hot water flows through the path of the hot water hose (150) on the outgoing side → the pipe (11) in the hot water branching unit (1) → the pipe connection (110). Supplied to the heat exchanger for heat dissipation in the fan convector (2). The hot water that has passed through the fan convector (2) is routed from the pipe connection (120) on the return side of the hot water branch unit (1) to the pipe (12) → the external hot water hose (151) → the hot water plug (15). Furthermore, it returns to the outdoor heat source device from a hot water outlet (not shown) to which the hot water plug (15) is connected. Thereby, heating by a fan convector (2) can be performed.

On the other hand, the hot water flowing into the hot water hose (140) on the hot water mat (14) side connected to the pipe (11) on the outgoing side of the hot water branching unit (1) is transferred from the hot water mat (14) to the hot water hose on the return side (141) → Hot water branch unit (1) Pipe (12) → External hot water hose (151) → Hot water plug (15) Is called. At this time, since the hot water supplied from the heat source device is set to a high temperature of about 80 ° C. as described above, the flow rate of the hot water supplied to the hot water mat (14) is throttled by the flow rate adjusting valve (13). Thus, the hot water mat (14) can be prevented from becoming high temperature.
Japanese Patent Laid-Open No. 11-14080

  However, in the conventional one, the hot water hose (140) (141) (150) (151) and the fan convector (2) connection to the hot water branch unit (1), the flow path in the hot water branch unit (1), Furthermore, there is a problem that the sealing performance of the connecting portion between the hot water plug (15) and the hot water outlet is likely to deteriorate over time and water leakage is likely to occur.

The above problem will be further described in detail.
As described above, in the conventional one, the flow rate of the high-temperature water (about 80 ° C.) supplied to the hot water mat (14) is limited by restricting the flow rate adjusting valve (13). ) Is maintained at an appropriate temperature. Therefore, the on-off valve (not shown) disposed in the hot water flow path in the fan convector (2) is closed to stop the hot air heating, and in this state, only the floor heating by the hot water mat (14) is performed. Further, the flow path resistance increases by the amount of closing the on-off valve disposed in the fan convector (2), and the flow rate control valve (13) is in the throttle state, so that the flow path resistance is further increased. Therefore, a large water pressure acts on the flow passage portion in the water-flowing state from the circulating pump for supplying hot water provided in the heat source device. For this reason, in the above-mentioned conventional one, the hot water hoses (140) (141) (150) (151) and the fan convector (2) are connected to the hot water branch unit (1) and the flow in the hot water branch unit (1). Excessive water pressure acts on the road and the connecting portion of the hot water plug (15) and the hot water outlet on the indoor wall surface, and the sealing performance is likely to deteriorate over time, and water leakage is likely to occur.

  The present invention has been made in view of such points, and is connected to the hot water hoses (140) (141) (150) (151) and the fan convector (2) to the hot water branch unit (1), the hot water branch unit ( 1) It is an object of the present invention to provide a hot water branching unit (1) having good durability by correcting the aging deterioration of the sealing performance of each part such as a flow path portion of the hot water inside.

[Invention of Claim 1]
The solution means of the invention according to claim 1 for solving the above-mentioned problem is as follows:
"The main flow path for the outward path through which hot water from the heat source device flows,
A plurality of forward branch flow paths that branch from the downstream end of the forward main flow path and supply hot water separately to the plurality of heat radiating terminals,
A plurality of return flow branching channels into which the warm water returning from each of the heat radiating terminals flows, and
A return main path that extends from a junction at the downstream end of the return branch flow path and returns hot water to the heat source device,
Each of the forward branch flow paths is provided with an electric on-off valve that can be controlled to open and close.
In the hot water branching unit of the present invention, an electric on-off valve that can be controlled to be opened and closed is provided in each of the forward branching channels.
Therefore, for example, a floor heating radiator (specifically, a hot water mat) that becomes too hot when a large amount of high-temperature water is continuously supplied is connected to the forward branch flow path and the return branch flow path. In this case, it is possible to control the opening / closing of the electrical on-off valve provided in the forward branch flow path to which the heat-dissipating terminal for floor heating is connected.

  Therefore, when using only the floor heating heat dissipation terminal among the connected fan-con vector for hot air heating and the floor heat dissipation terminal, close the electric on-off valve that supplies hot water to it. If the circulating pump in the heat source unit is stopped at this time, the pump pressure does not act on each flow path.

  Therefore, compared to the conventional case where the temperature is adjusted by reducing the flow rate of the high temperature water (about 80 ° C) supplied to the hot water mat (14) by restricting the flow rate adjusting valve (13), The large pump pressure that causes deterioration of the sealing performance does not act on the connection part of the hot water hose that connects the terminal for heat dissipation.

[Invention of Claim 2]
In the invention according to claim 1,
“The hot water branching unit includes a unit main body in which the forward main flow path, the forward branch flow path, the return branch flow path, and the return main flow path are formed, and the unit main body is operated. It consists of the operation device of
At least one of the heat radiating terminals is a hot water mat for floor heating,
When an operation unit for floor heating provided in the operation device is operated, a valve control means for intermittently opening and closing the electric on-off valve that supplies hot water to the hot water mat is provided. be able to.
In this case, when an operation unit for floor heating provided in the operation device is operated, an electric on-off valve that supplies hot water to the hot water mat for floor heating is intermittently opened and closed by the valve control means. Accordingly, high temperature water of about 80 ° C. can be intermittently supplied to the hot water mat and set to an appropriate temperature.

[Invention of Claim 3]
In the invention according to claim 2,
If the operation device is a remote operation device that is configured separately from the unit main body and wirelessly communicates an operation signal to the valve control means, an arbitrary remote from the unit main body installation location It is possible to remotely control the unit body from the location of the unit with the operation device. Therefore, it is not necessary to move to the installation portion of the unit main body at the time of the operation, and it is easy to use.

The present invention has the following specific effects.
Compared to the case where the temperature is adjusted by reducing the flow rate of high temperature water (about 80 ° C) to the hot water mat (14) by restricting the flow rate adjustment valve (13) as described above, the hot water branching unit and the terminal for heat dissipation A large pump pressure that causes deterioration of the sealing performance does not act on the connection part of the hot water hose that connects the two. Accordingly, it is possible to provide a hot water branching unit with improved durability by correcting the aging deterioration of the sealing performance of each part such as the connecting part of the hot water hose and the hot water channel part in the hot water branching unit.

  In the invention according to claim 3, as already described, since it is not necessary to move to the installation portion of the unit main body when operating the heat radiating terminal, a hot water branching unit with good usability can be provided.

The best mode for carrying out the present invention will be described below with reference to the accompanying drawings.
FIG. 1 is a perspective view showing an overall configuration of a hot water heating system using a hot water branching unit (1) according to the present embodiment. The hot water branching unit (1) operates a unit main body (19) and the unit main body (19). It consists of a remote control device (4). In addition, the heat source device (3) disposed outdoors is connected to a hot water outlet (32) disposed on the wall surface (33) of the building via an external pipe (30) (31). The hot water plug (15) connected to the outlet (32) is connected to the unit body (19) according to the present embodiment via the hot water hoses (150) (151).

  The plug connection port (16) recessed at the tip of the unit body (19) is detachably connected with a hot water plug (20) (18) for the fan convector (2) and hot water mat (14). At the same time, the unit main body (19) is remotely operated by the remote operation device (4). Details of each part will be described below.

[Heat source (3)]
As shown in FIG. 1, the heat source (3) is provided with a gas burner (34) supplied with gas from a gas valve (35), and a heat exchanger (36) heated by the gas burner (34). The internal pipes (37) and (38) are connected. Among these, one internal pipe (38) is provided with a circulation pump (P), and a control device (39) for controlling the circulation pump (P), the gas valve (35) and the like is a heat source device. Built in (3).

[Hot water outlet (32)]
The hot water outlet (32) connected to the external pipes (30) and (31) connected to the tips of the internal pipes (37) and (38) disposed in the heat source unit (3) is the wall surface of the room as described above. (33), and plug insertion holes (321) and (322) for inserting and connecting the plugs (152) and (153) of the hot water plug (15) are plug connection ports (320 ) Is open inside.

[Hot water plug (15)]
As shown in FIG. 1 and FIG. 2, the hot water plug (15) connected to the hot water outlet (32) has a hot water hose (15) connecting the aforementioned insertion tube (152) (153) and the unit body (19). 150) (151) are connected.

[Hot water branch unit (1)]
As described above, the hot water branching unit (1) is composed of the unit body (19) and the remote control device (4).

<Unit body (19)>
As shown in FIG. 2, the hot water hose (150) drawn from the hot water plug (15) is connected to a hot water inflow tube (50) protruding from the back of the unit body (19), while the hot water plug The other hot water hose (151) drawn out from (15) is connected to a hot water discharge cylinder (51) protruding from the back surface of the unit body (19).

  In the unit body (19), an outward main flow path (52) extending from the hot water inflow cylinder (50) and two forward branch flow paths (53) (54) branching from the downstream end thereof are formed. The forward branching passages (53) and (54) are provided with thermally operated valves (55) and (56) corresponding to the “electrical on-off valves” which are specific matters of the invention described above.

  Since the thermal valves (55) and (56) have the same structure, the structure of only one thermal valve (55) will be described with reference to FIG. The thermal valve (55) includes a wax element (c) that is heated and expanded by an electric heater (b) that generates heat with current from the lead wire (a), and is a forward and backward rod that is pushed out by the wax element (c). In (d), the valve stem (e) is advanced. When the valve body (f) at the tip is moved to the valve seat (h) portion (valve closing position) against the biasing force of the spring (g) as the valve shaft (e) advances, The branching flow path (53) is blocked. On the other hand, when returning the forward branching flow path (53) to the non-blocking state, the power supply to the lead wire (a) is blocked. Then, the electric heater (b) is in a non-heated state and the wax element (c) is thermally contracted, so that the valve body (f) is moved back to the valve open position by the urging force of the spring (g). The forward branch flow path (53) returns to the non-blocking state.

  Further, in the unit main body (19), as shown in FIG. 2, there are two return branch passages (58) and (59) corresponding to the forward branch passages (53) and (54), respectively. A return main flow path (57) is formed from the junction (49) at the downstream end to the hot water discharge cylinder (51).

  As shown in FIG. 1, the plug insertion holes (580) and (530) at the distal ends of one return path branch channel (58) and forward path branch channel (53) appearing in FIG. It is open to the plug connection port (16) part at the tip. Also, the plug connection ports (590) and (540) at the tips of the other return branch channel (59) and the forward branch channel (54) appearing in FIG. ) Is open to the plug connection port (17) at the tip.

<Remote control device (4)>
As shown in FIG. 1, the remote control device (4) is provided with a display unit (46) for displaying the operation state of the fan convector (2) and the hot water mat (14). 2 A low temperature heating key (40) (41), a high temperature heating key (42), a room temperature sensor (45), and a temperature control unit (44) are provided. The temperature control unit (44) includes a temperature increase key (440) and a temperature decrease key (441), and the room temperature sensor (45) monitors the room temperature when operating a fan convector (2) described later. It has a function.

[Fancon vector (2) and hot water mat (14)]
As shown in FIGS. 1 and 2, a hot water plug (20) is attached to the tip of the hot water hose (200) (201) drawn from the fan convector (2) and the hot water hose (200) (201). ) Are inserted into the plug insertion holes (530) (580) in the plug connection port (16) recessed at the tip of the unit body (19). It has come to be.

  As shown in FIG. 3, a heat exchanger (21) for radiating heat is connected to the hot water hoses (200) (201) in the fan convector (2), and hot water to the heat exchanger (21) is provided. There is provided a thermal valve (23) for supplying and shutting off. The fan convector (2) is provided with a heat radiating fan (24) for releasing the heat of the heat exchanger (21) into the room, and a temperature setting switch (26) shown in FIG. ) And a temperature sensor (28) for monitoring the room temperature and a high-temperature heating switch (25) (see FIGS. 1 and 3).

  As shown in FIGS. 1 and 2, a hot water plug (18) is attached to the tip of the hot water hose (140) (141) drawn from the hot water mat (14), and the hot water hose (140) (141). ) Are inserted and connected to the plug insertion holes (540) (590) in the plug connection port (17) recessed in the tip of the unit body (19). It has come to be. A meandering hot water pipe (142) communicating with the hot water hoses (140) (141) is embedded in the hot water mat (14).

[Control circuit]
FIG. 3 is a diagram illustrating an example of a control circuit of the hot water heating system.
The output of the temperature control unit (44) provided in the remote control device (4) is wirelessly transmitted to an oscillation circuit (60) (provided in the unit main body (19)) that alternately outputs H and L signals. When the temperature increase key (440) is operated by communication, the ratio (duty ratio) of the H signal to the L signal from the oscillation circuit (60) increases. On the contrary, the temperature decrease key (441) is When operated, the duty ratio decreases.

  Next, the output of the first low temperature heating key (40) provided in the remote control device (4) is abbreviated as a first toggle flip-flop (hereinafter referred to as "first TFF") in the unit body (19) by wireless communication. ) (63), and the output of the first TFF (63) and the oscillation circuit (60) is applied to the second AND circuit (66). The thermal valve (56) for the hot water mat (14) is opened by a signal from the second AND circuit (66).

  The output of the second low-temperature heating key (41) provided in the remote control device (4) is the second toggle flip-flop (hereinafter abbreviated as “second TFF”) in the unit body (19) by wireless communication. (64), and the output of the second TFF (64) and the oscillation circuit (60) is applied to the third AND circuit (67).

  The output of the high temperature heating key (42) provided in the remote control device (4) is applied to the first OR circuit (68) in the unit body (19) by wireless communication, and the first OR circuit (68) The output is applied to a third toggle flip-flop (hereinafter abbreviated as “third TFF”) third TFF (65). The thermal valve (55) for the fan convector (2) is opened by the second OR circuit (69) that outputs the OR signal of the outputs of the third TFF (65) and the third AND circuit (67). ing.

  The output of the high temperature heating switch (25) provided in the fan convector (2) is applied to the third TFF (65) via the first OR circuit (68), and the output of the third TFF (65) The thermal valve (23) in the fan convector (2) is opened and the heat radiating fan (24) is rotated. The thermal valve (23) has the same configuration as the thermal valve (55) shown in FIG.

  The output of the second AND circuit (66) and the second OR circuit (69) provided in the unit body (19) is transferred to the control device (39) in the heat source (3) via the third OR circuit (70). The gas valve (29) for the gas burner (34) is opened so that the gas burner (34) is combusted and the circulation pump (P) is operated.

[Actual behavior]
Next, the operation of the hot water heating system will be described.
When floor heating operation is performed by turning on the first low temperature heating key (40) provided in the remote control device (4), the H signal from the first TFF (63) and the AND signal of the H signal of the oscillation circuit (60) Is intermittently output from the second AND circuit (66), and the thermal valve (56) is intermittently opened and closed in synchronization with the H signal from the second AND circuit (66). Therefore, in the present embodiment, the combination of the oscillation circuit (60), the first TFF (63), and the second AND circuit (66) corresponds to the “valve control means” as the invention specific matter of the second aspect. If the ratio (duty ratio) of the H signal to the L signal output from the oscillation circuit (60) is increased by the operation of the temperature adjustment unit (44), the valve opening time of the thermal valve (56) becomes the valve closing time. On the other hand, the floor heating temperature is increased.

  When an intermittent H signal is output from the second AND circuit (66), the signal is applied to the control device (39) in the heat source device (3) via the third OR circuit (70). Therefore, when the fan convector (2), which will be described later, is stopped (when the third TFF (65) outputs an L signal), the heat source (3) is synchronized with the intermittent H signal. The gas burner (34) burns and the circulation pump (P) operates.

  Then, the hot water heated and generated in the heat exchanger (36) by the combustion of the gas burner (34) is transferred to the main flow path (52) for the outward path in the heat exchanger (36) → external pipe (30) → unit main body (19). ) → Branch flow path (54) → Thermal valve (56) → Warm hot water hose (140) for hot water mat (14) → Hot water pipe (142) → Return hot water hose (141) → Unit body ( 19) in the return branch flow path (59) in the return path main flow path (57) → external piping (31) → circulation pump (P) → circulate in the path connected to the heat exchanger (36), Floor heating is performed with a hot water mat (14).

When the fan convector (2) is in the stopped state (the third TFF (65) is outputting the L signal) and the floor heating is being performed, the thermal valve (56) as described above. Opens and closes intermittently. Further, the circulation pump (P) is turned ON / OFF in synchronization with the intermittent opening / closing operation of the thermal valve (56), and the gas burner (34) repeats the combustion / extinguishing operation. That is, when the circulation pump (P) is operating, the thermal valve (56) is kept fully open, while when the circulation pump (P) is stopped, the thermal valve (56) is fully closed. Maintained in a state. Therefore, in the state where the circulation pump (P) is continuously operated with the flow rate control valve (13) being throttled, the unit body (19) and this and the hot water hose (140) (141) (150) Excessive water pressure does not act on the connection part of (151), the pipe connection part of the unit body (19) and the fan convector (2), and the sealing part such as the connection part of the hot water plug (15) and the hot water outlet (32). . Therefore, the sealability of these parts is hardly lowered and the durability is improved.
When the floor heating operation is stopped, the first low temperature heating key (40) is turned on again, thereby returning to the state where the L signal is output from the first TFF (63).

Next, the heating operation of the fan convector (2) will be described.
When the high temperature heating key (42) of the remote control device (4) or the high temperature heating switch (25) of the fan convector (2) is operated, the operation signal is sent to the first OR circuit (68) in the unit body (19). The second OR circuit (69) and the third OR circuit (70) continuously output an H signal so that the gas burner (34) of the heat source device (3) continuously burns. The circulating pump (P) continues to operate.

  On the other hand, due to the output of the third TFF (65), the heat operated valve (23) in the fan convector (2) is opened and the heat radiating fan (24) is operated. Then, the hot water heated and generated in the heat exchanger (36) of the heat source device (3) is transferred to the main flow path (52) for the forward path in the heat exchanger (36) → external pipe (30) → unit main body (19). ) → Branch flow path (53) → Thermal valve (55) → The hot water hose (200) going to the fan convector (2) → Thermal valve (23) → Heat exchanger (21) → Hot water on the return side Hose (201) → Branch flow path for return path (58) in unit body (19) → Main flow path for return path (57) → External piping (31) → Circulation pump (P) in heat source unit (3) → Heat It circulates through the path | route connected with an exchanger (36), and, thereby, indoor heating is performed.

  When the fan convector (2) and the hot water mat (14) are used at the same time, the continuous H signal from the third TFF (65) passes through the second OR circuit (69) and the third OR circuit (70). Is applied to the control circuit (39) in the heat source device (3), whereby the circulation pump (P) in the heat source device (3) continues to operate and the gas burner (34) also continuously burns. In this case, the hot water heated and generated by the heat exchanger (36) of the heat source device (3) is transferred from the forward main flow path (52) in the unit body (19) to the forward branch flow path (53) (54). Accordingly, hot water is supplied in parallel to the hot water mat (14) and the fan convector (2). Accordingly, there is no inconvenience that the heating capacity of the hot water mat (14) is lowered unlike the circuit configuration in which the hot water after the temperature is lowered by passing through the fan convector (2) flows into the hot water mat (14).

Next, the heating operation when the hot water mats (14) (14) are connected to the plug connection ports (16) (17) of the unit body (19) will be described.
Since the control operation when the first low-temperature heating key (40) in FIG.

  Next, when the second low temperature heating key (41) is operated, the second TFF (64) outputs the H signal, and the AND signal of the H signal and the H signal of the oscillation circuit (60) is output to the third AND circuit ( 67) is applied to the thermal valve (55) via the second OR circuit (69) and the third OR circuit (70), and the thermal valve (55) is intermittently opened and closed in synchronization with the AND signal. To do. Therefore, in the present embodiment, the combination of the oscillation circuit (60), the second TFF (64), and the third AND circuit (67) corresponds to the “valve control means” as the invention specific matter of the second aspect. .

  The output of the third OR circuit (70) burns the gas burner (34) in the heat source unit (3) and intermittently operates the circulation pump (P), whereby heat is generated by the heat exchanger (36). The hot water is intermittently supplied to the hot water mats (14) and (14) to perform floor heating.

[Others]
1. In the above embodiment, the forward branching flow channels (53) and (54) and the return branching flow channels (58) and (59) are each formed in two, but three or more of these may be formed. Good.
2. In the above embodiment, the remote control device (4) for performing the floor heating and the hot air heating by the fan convector (2) is configured separately from the unit main body (19), but the floor heating or the like is performed. An operating device for this purpose may be formed integrally with the unit body (19).

The perspective view of schematic structure of the hot water heating system using the unit main body (19) which concerns on embodiment of this invention. 1 hot water circuit diagram Control circuit diagram of FIG. Cross section of thermal valve (55) Illustration of conventional example Illustration of conventional example

Explanation of symbols

(1) ... Hot water branch unit
(3) ... Heat source
(4) ... Remote control device
(14) ・ ・ ・ Hot water mat
(19) ・ ・ ・ Unit body
(52) ・ ・ ・ Outbound main flow path
(53) (54) ・ ・ ・ Branch channel for forward path
(57) ... Return main flow path
(58) (59) ・ ・ ・ Branch flow path for return
(55) (56) ・ ・ ・ Thermal valve

Claims (3)

An outward main flow path through which hot water from the heat source device flows,
A plurality of forward branch flow paths that branch from the downstream end of the forward main flow path and supply hot water separately to the plurality of heat radiating terminals,
A plurality of return flow branching channels into which the warm water returning from each of the heat radiating terminals flows, and
A return main path that extends from a junction at the downstream end of the return branch flow path and returns hot water to the heat source device,
A hot water branching unit, wherein each of the forward branching channels is provided with an electrical on-off valve that can be controlled to open and close. In the hot water branching unit according to claim 1,
The hot water branch unit includes a unit main body in which the forward main flow channel, the forward branch flow channel, the return branch flow channel, and the return main flow channel are formed, and for operating the unit main body. It consists of an operating device,
At least one of the heat radiating terminals is a hot water mat for floor heating,
A hot water branching unit provided with valve control means for intermittently opening and closing the electric on-off valve for supplying hot water to the hot water mat when an operation unit for floor heating provided in the operating device is operated . In the hot water branching unit according to claim 2,
The operating device is a hot water branching unit that is configured separately from the unit main body and is a remote operating device that wirelessly communicates an operation signal to the valve control means.

Images