JPH0375441A - Hot water supply - Google Patents

Abstract

PURPOSE:To reduce the size and cost of a hot water supply by providing it with one operating motor for driving first and second valve mechanisms to operate them in the condition of an adjusted interlocking function. CONSTITUTION:For adjusting the temperature of hot water supplied from a heat exchanger 1 to the set additional-heating temperature Tc, first and second valve mechanisms 12 and 13 are automatically regulated so that the temperature T3 supplied hot water detected by a second supplied hot water temperature sensor 14 is adjusted to a set general supplied hot water temperature Ta by controlling the mixing ratio of hot water supplied from the heat exchanger 1 and water supplied from a bypass 7. Changing the overlap condition of a first valve port 27 and a first inflow port 22 is the regulating operation of the first valve mechanism 12. Changing the overlap condition of a second valve port 28 and a second inflow port 23 is the regulating operation of the second valve mechanism 13. A general hot water supply side operating motor 20 is provided for driving the first and second valve mechanisms 12 and 13, respective ly, to operate them in the condition of an adjusted interlocking function. Thus, the size and the cost of a hot water supply can be reduced.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention connects a hot water supply path from a water heating heat exchanger with a bypass path branched from a water supply path to the water heating heat exchanger, and The present invention relates to a water heater provided with a first valve mechanism that adjusts the amount of hot water supplied from the water heating heat exchanger, and a second valve mechanism that adjusts the amount of bypass water supplied from the bypass path to the hot water supply path.

[Conventional technology]

Conventionally, water heaters such as those described above have been provided with separate operating motors for driving and operating the first valve mechanism and operating motors for driving and operating the second valve mechanism.

[Problem to be solved by the invention]

However, the conventional configuration described above requires two operating motors, which complicates the device structure, leading to an increase in the overall size of the water heater and increasing the device cost.In addition, the control configuration is also complicated. Therefore, due to the complexity of the control configuration, there was a problem that it was easy to cause control troubles.

The object of the present invention is to solve the above-mentioned problems by rational improvements.

[Means to solve the problem]

A characteristic configuration of the water heater according to the present invention is that a bypass path branched from the water supply path to the water heating heat exchanger is connected to the hot water supply path from the water heating heat exchanger, and A first valve mechanism that adjusts the amount of hot water supplied from the bypass passage to the hot water supply passage, and a second valve mechanism that adjusts the amount of bypass water supplied from the bypass passage to the hot water supply passage, wherein the first valve mechanism and the second valve mechanism are provided. The present invention is provided with one operation motor that is operated while performing the interlocking adjustment function, and its functions and effects are as follows.

[Function] In other words, when one operation motor is driven, the first valve mechanism and the second valve mechanism operate in conjunction with each other, and the amount of hot water supplied from the water heating heat exchanger and the amount of bypass water supplied from the bypass path are adjusted. Each of these is adjusted in a predetermined relationship, thereby adjusting the hot water supply state to the hot water supply path downstream of the bypass path connection point.

〔Effect of the invention〕

That is, according to the present invention, the function of adjusting the hot water supply state to the hot water supply path on the downstream side of the bypass path connection point is sufficiently maintained, while the device functions as a drive operating device for the first valve mechanism and the second valve mechanism. Since the configuration includes only one operating motor, the device structure can be simplified compared to the conventional configuration in which each operating motor is provided separately, which in turn reduces the overall size of the water heater and reduces device costs. I was able to figure it out.

In addition, since there is only one operation motor, the control configuration is simplified, and because of the simplification of the control configuration, occurrence of control troubles can be suppressed, and reliability can also be improved.

〔Example〕

Next, an example will be described.

FIG. 1 shows the overall configuration of a water heater, in which (1) is a heat exchanger for heating water, and (2) is a burner.

The hot water supply path (3) from the heat exchanger (1) is a first hot water supply path (3a) for general hot water supply that connects to the hot water tap (4), and a bathtub (5).
), and the second water supply route (3b) for bath hot water supply connects to the heat exchanger (1), and the first water supply route (3a) for general hot water supply connects to the heat exchanger (1). 6) is connected to a bypass path (7) branching off from the bypass path (7).

(8) is a water supply temperature sensor, (9) is a first water flow sensor that detects the water flow to the heat exchanger (1), and (10) is a heat exchanger (
1) a first hot water temperature sensor that detects the water heater from (11);
) is a check valve, (12) is a first valve mechanism that adjusts the amount of hot water supplied from the heat exchanger (1) to the first hot water supply path (3a), and (13) is from the bypass path (7) to the first hot water supply path (3a) is a second valve mechanism that adjusts the bypass water supply amount to the bypass passage (14);
7) a second hot water supply temperature sensor for detecting the hot water temperature in the first hot water supply path (3a) downstream of the connection point (15);
(16) is a second water flow sensor that detects the amount of hot water in the first hot water supply path (3a) downstream of the connection point of the bypass path (7); ) hot water supply! Third valve mechanism that adjusts (bath water supply amount), (17
) is a vacuum breaker that prevents backflow of water in the bathtub, (1
8) is an electromagnetic proportional valve type fuel adjustment valve that adjusts the amount of fuel gas supplied to the burner (2).

(19) is a controller that executes the following operational controls (A) to (0) based on manual operation commands.

(B) General hot water supply only When the hot water tap (4) is opened, the second water flow sensor (15) detects the water volume in response to the burner (2
) is automatically ignited, and in order to bring the water heater from the heat exchanger (1) to the set general hot water temperature (Ta), the set general hot water temperature (Ta) is detected by the water supply temperature sensor (8). The fuel adjustment valve (18) is automatically adjusted based on the water temperature (TI) and the water supply amount (Ql) detected by the first water flow sensor (9), and the water heater (T2) is detected by the first water temperature sensor (10). > and the set general hot water temperature (Ta), the fuel adjustment valve (1 day) is automatically finely adjusted.

Note that the second valve mechanism (13) for adjusting the bypass water supply amount and the third valve mechanism (16) for adjusting the bath hot water supply N are each in a flow path blocked state.

Also, in order to ensure that the required heating capacity to obtain the above-mentioned set general hot water supply temperature (Ta) does not exceed the upper limit heating capacity (i.e., in the automatic adjustment of the above-mentioned fuel adjustment valve (18),
The first valve mechanism (12) is automatically throttled as necessary so that the required fuel gas supply amount does not exceed the upper limit of the adjustment range of the fuel adjustment valve (18).

(TI) When a hot water filling operation command is given, the third valve mechanism (16) is automatically opened, the burner (2) is automatically ignited, and the heat exchanger (1) is The hot water supply section (Tb) where the hot water temperature is set
), the fuel is adjusted based on the set hot water supply unit (Tb), the detected water supply temperature (TI) by the water supply temperature sensor (8), and the water supply 11 (Ql) detected by the first water flow sensor (9). In addition to automatically adjusting the valve (18), the fuel adjustment valve (18) is automatically finely adjusted according to the deviation between the hot water temperature (T2) detected by the first hot water temperature sensor (10) and the set hot water supply section (Tb). do.

The second valve mechanism (13) for adjusting the amount of bypass water supply is in the flow path cutoff state, while the first valve mechanism (12) is in the state of interrupting the general hot water supply (opening of the hot water faucet (4)) during hot water filling. The valve should be open in preparation for the stopper.

Further, the third valve mechanism (16) is automatically throttled as necessary so that the heating capacity required to obtain the above-mentioned set hot water supply section (Tb) does not exceed the upper limit heating capacity.

(c) Single reheating hot water supply When a reheating operation command is given, the third valve mechanism (16) is automatically opened, the burner (2) is automatically ignited, and the fuel gas is supplied to the burner (2). Heat exchanger (1) with the supply amount CG) specified as the set reheating limit gas amount (Gc).
Set the hot water temperature from the reheating hot water temperature (Tc), which is set higher than the general hot water temperature (Ta) and the set hot water supply part (Tb).
) (for example, a high temperature of 93°C), the fuel adjustment valve (18) is automatically adjusted, and the above-mentioned set limit gas amount (Gc ), set reheating hot water temperature (T
c), the third valve mechanism (16) based on the detected feed water temperature (T3)
Automatically adjust.

Note that the hot water temperature (T3) detected by the first hot water temperature sensor (work 0)
) and the set reheating hot water temperature (Tc), automatic fine adjustment of the fuel adjustment valve (18) is carried out.

Further, the first valve mechanism (12) and the second valve mechanism (13) for adjusting the amount of bypass water supply are each opened in preparation for interruption of general hot water supply during reheating.

(d) Parallel implementation of hot water filling and general hot water supply If either hot water filling or general hot water supply is being performed and the other is interrupted, the first valve mechanism (12) (normally (normally open) and the third valve mechanism (port 6) are both in the open state,
The hot water supplied from the heat exchanger (1) is divided into the second hot water supply path (3a) for general hot water supply and the second hot water supply path (3b) for bath hot water supply, and the heat exchanger (1) In order to set the hot water supply temperature from 1) as the set hot water supply section (Tb) (priority is given to the hot water supply section over the general hot water supply temperature), set the fuel adjustment valve (18) as in the case of (0) above. Automatic adjustment and automatic fine adjustment.

In addition, the first valve mechanism (12) and the third valve mechanism ( 16
), and this first valve mechanism (12)
and the third valve mechanism (16), the set hot water filling part (Tb), the detected water supply temperature (T3), and the second
The first valve mechanism (12) is automatically adjusted so that the heating capacity required for general hot water supply, which is determined based on the hot water supply amount (port 2) detected by the water flow sensor (15), does not exceed the set value. Compensate for hot water supply.

Note that the second valve mechanism (work 3) for adjusting the amount of bypass water supply is in a flow path blocked state.

0) Parallel implementation of reheating hot water supply and general hot water supply If either hot water filling or general hot water supply is being performed and the other is interrupted, the first With both the valve mechanism (12) (normally open) and the third valve mechanism (16) open, the heat exchanger (1
) to the first hot water supply path (3a) and the second hot water supply path (3a).
b) and the heat exchanger (1).
In order to make the amount of hot water supplied from , and automatically adjusts the fuel adjustment valve (18) according to the deviation between the hot water supply amount (T2) detected by the first hot water temperature sensor (10) and the set reheating hot water temperature (Tc). ) is automatically fine-tuned.

Then, in order to adjust the amount of hot water supplied from the heat exchanger (1) to the high-temperature setting reheating hot water temperature (Tc), the amount of hot water supplied (Tff) detected by the second hot water temperature sensor (14) (hot water tap (
4) to the set general hot water temperature (Ta) by adjusting the mixing ratio of the hot water supplied from the heat exchanger (1) and the water supplied from the bypass path (7). Valve mechanism (1
2) and the second valve mechanism (13) are automatically adjusted.

Regarding the operation of the first valve mechanism (12) and the second valve mechanism (13), one general hot water supply side operating motor ( 20), the first valve mechanism (12)
This simplifies the operation configuration compared to providing separate operation motors for driving and operating the second valve mechanism (13) and the operation motor for driving and operating the second valve mechanism (13).

As shown in Fig. 2, the specific structures of the first valve mechanism (12) and the second valve mechanism (13) include a cylindrical valve case (
21), a first inlet (22) which is an inlet for the hot water sent from the heat exchanger (1) to the first hot water supply path (3a).
, and a second inlet (23) which is an inlet for the supply water from the bypass passage (7), and one cylindrical rotary valve body (24) is installed inside the cylindrical rotary valve. Body (24
), there is a hot water outlet (25) (first
A torrent flow path (26) is formed which is constantly in communication with the outlet to the downstream portion of the hot water supply path (3a), and this torrent flow path (26
) and the first inlet (22) communicate with each other.
), and a second valve hole (28) that communicates the torrent flow path (26) with the second inlet (23), thereby connecting the cylindrical rotary valve body (24) to the gear mechanism (29). By rotating the general hot water supply side operating motor (20) through the
Overlapping state of the first valve hole (27) with respect to the inlet (22) and second valve hole (28) with respect to the second inlet (23)
The amount of hot water supplied from the heat exchanger (1) and the amount of bypass water supplied from the bypass path (7) are adjusted by changing the overlapping state of the two.

That is, the first valve hole (27) for the first inlet (22)
The overlapping state change is an adjustment operation of the first valve mechanism (12), and the second valve hole (28) for the second inlet (23) is adjusted.
) is an adjustment operation of the second valve mechanism (13), and the first valve mechanism (12) and the second valve mechanism (13)
converts those valve bodies into the one cylindrical rotary valve body (24).
This is a configuration that can be used for both.

The relationship between the first valve mechanism (12) and the second valve mechanism (13), which are driven and operated by one general hot water supply side operating motor (20), is that the first inlet (22), the second inlet ( 23
), the first valve hole (27), and the second valve hole (28), and by appropriately setting the opening shape of each,
An operating motor (20) whose rotation is controlled by a controller (19)
) are provided with the following first to fifth operating ranges (xl) to (X3) (see FIG. 3).

First operation range (L): With respect to the rotation of the operation motor (20), the bypass water supply amount (Q3) from the bypass path (7) is maintained at a predetermined value (Oa) from the heat exchanger (1). An operation range in which only the amount of hot water supplied (Q4) (the amount of hot water supplied to the first hot water supply path (3a)) is changed.

Second operating range (XZ): Bypass water supply amount (Q3) and heat exchanger (1) relative to the rotation of the operating motor (20)
The amount of hot water supplied (Q4) from each predetermined value (Qa).

(Qb) The dead band operating range to be maintained at (Qb).

Third operating range (X3): The amount of hot water supplied from the heat exchanger (1) (Q4) is set to a predetermined value (
An operation range in which only the bypass water supply amount (g3) is changed from the predetermined value (Qa) to 0 while maintaining the amount Qb).

Fourth operation range (X4): Maintains the bypass water supply amount (Q3) at O with respect to the rotation of the operation motor (20), and maintains the hot water supply ff1 (Q4) from the heat exchanger (1) to a predetermined value (Qb )
Dead band operating area to be maintained.

Fifth operating range (XS): Amount of hot water supplied from the heat exchanger (1) (Q4) with bypass water supply ff1 (Q3) kept at 0
In other words, the above-mentioned general hot water supply alone (a) is carried out in the fourth or fifth operating range (χ4), (xs), In addition, hot water supply (II) is carried out in the fourth operation area (χ4), reheating hot water supply (C) is carried out in the second operation area (X2), and the combination of hot water supply and general hot water supply is Parallel implementation (d) is the same as general hot water supply implementation (a), the fourth or fifth operating range (X4)
, (Xs), and parallel implementation of reheating hot water supply and general hot water supply 0) is carried out in the first, second, or third operation range (Xs).
t), (xx).

This is the configuration implemented in (X3).

As mentioned above, the general hot water supply alone (A) is carried out in the fourth or fifth operating range (L), (Xs), but as the hot water tap (4) is closed, the second water flow sensor (15) is activated. When the burner (2) is automatically extinguished in response to the water volume not being detected (when the general hot water supply alone is stopped), the following (i)
, (ii).

(stone) The controller (19) is designed to execute the control as shown in FIG.

(i) After the burner extinguishing operation, the set allowable time (lLt) (for example, about 5 seconds) is the first and second valve mechanism (12),
(13) operation position to the fourth or fifth operation area (X4)
, (xs) position at the time of burner extinguishing operation (
For example, in the state held at point a in FIG. 3), wait for the next start of the general hot water supply alone (a) (reopening of the hot water tap (4>)).

In other words, if ordinary hot water supply (a) is resumed within a few seconds after the burner extinguishing operation, there is no so-called after-boiling problem.In fact, as described above, after the burner extinguishing operation
It is better to stand by with the operating positions of the first and second valve mechanisms (12) and (13) held at the position at the time of the burner extinguishing operation for a few seconds (set allowable time (Hl)) for general hot water supply alone. It is possible to stabilize the amount of hot water supplied to the hot water tap (4) when implementation (a) is restarted.

(ii) If there is no restart of general hot water supply (a) (reopening of the hot water tap (4)) during the above set permissible time (Hl), the setting will be set from the time when the set permissible time (Hl) completes. During the standby time (Hl) (for example, about 5 minutes), the first
and a second valve mechanism (12).

(13) within the third operation area (X3) (for example,
- Point b in Figure 3) - General hot water supply alone (
Wait for the resumption of b).

In other words, if the general hot water supply operation (a) is resumed within a few minutes after extinguishing the burner (2), after-boiling will occur. For several minutes (set standby time (Hl)) from the completion of H3), the first and second valve mechanisms (12),
By waiting with the operation position of (13) moved to the third operation area (X3), which is the operation area that allows bypass water supply from the bypass path (7), general hot water supply is carried out independently (a)
When restarting, bypass water supply is performed at the same time to prevent after-boiling.

In addition, when moving the operation positions of the first and second valve mechanisms (12) and (13) to the third operation range (X3) and waiting, the standby operation value W (point b) is measured by the feed water temperature sensor ( 8)
The lower the detected feed water temperature (Tt), the lower the third operating range (X3
), the higher the bypass detection feed water temperature (TI), the higher the
This allows the amount of hot water supplied to the hot water tap (4) to converge when the general hot water supply alone (a) is resumed with bypass water supply to prevent after-boiling. By suppressing the characteristics from changing depending on the bypass water supply temperature, bypass water supply not only prevents after-boiling but also further improves water heater convergence when ordinary hot water supply alone (a) is resumed. be.

In addition, after restarting the general hot water supply alone (a), the deviation between the water heater (T2) detected by the first hot water temperature sensor (10) and the set general hot water temperature (Ta) will be equal to the set value (for example, 10"Cdeg).
), the first and second valve mechanisms (12
), (13) is moved to the fourth or fifth operating range (X4), which is the normal operating range for general hot water supply alone (a).
, (xs).

(iii) If the general hot water supply alone (a) is restarted after the above set standby time (H2) has elapsed, after-boiling will no longer occur. If there is no resumption of independent implementation, the first
Then, with the operation positions of the second valve mechanisms (12) and (13) returned from the third operation range (X3) to the fourth operation range (X4), wait for the resumption of the general hot water supply alone (a).

In addition, since the time period during which after-boiling occurs after the burner extinguishing operation differs depending on the device characteristics of the water heater, the above-mentioned allowable setting time (Hl) and setting standby time (H2) are determined as appropriate according to the device characteristics. It is something to do.

In the parallel implementation of reheating hot water supply and general hot water supply (N), the water heater from the heat exchanger (1) is adjusted to the high temperature set reheating hot water temperature (Tc) as described above. 2-valve mechanism (
12), (13) operating position to the first, second, or third operating range (xt), (xt), (xi)
The water heater (T3) is detected by the second hot water temperature sensor (14) inside the water heater (T3).
) and the set general hot water temperature (Ta), the water heater (T3) detected by the second hot water temperature sensor (14) (that is, the water heater to the hot water faucet (4)) is set. The temperature is adjusted to the general hot water temperature (Ta), but the operation positions of the first and second valve mechanisms (12) and (13) are adjusted to the first, second,
or the third operating range (Xt).

(Xt) and (X3) in accordance with the above deviation, the operation position change speed (i.e., the adjustment operation speed of the first and second valve mechanisms (12) and (13)) is adjusted to the second water flow sensor. (15) The larger the detected hot water supply amount (port 2) is, the larger the value is, and the smaller the detected hot water supply amount (port 2) is, the smaller the operation position change is.

In other words, changing the unit amount of bypass water supply (port 3) or changing the unit amount of hot water supply from the heat exchanger (1) (port 4) (the amount of hot water supplied to the first hot water supply path (3a)) On the other hand, the width over which the water heater (TRI) detected by the second hot water temperature sensor (14) changes to the hot water tap (4) is
Hot water supply to! (Hot water supply I detected by the second water flow sensor (15)
(Q3)) is smaller, and the smaller the amount of hot water supplied to the hot water tap (4) (port t) is, the larger it is.
Detection by the hot water temperature sensor (14) When adjusting the water heater (T3) to the set general hot water temperature (Ta), even if their deviations are the same (in other words, the detection by the second hot water temperature sensor (14) Even if the water heater (T3) is changed by a predetermined temperature), the larger the amount of hot water supplied to the hot water tap (4) (port 2), the greater the amount of water supplied by bypass (port 3) or the amount of hot water supplied from the heat exchanger (1). It is necessary to change the amount (port 4) significantly, and the hot water supply to the hot water faucet (4) 1! The smaller (Qt) is, the smaller the necessary change in the amount of bypass water supply (port 3) or the amount of hot water supplied from the heat exchanger (1) (Q3) becomes.

Therefore, depending on the amount of hot water supplied to the hot water tap (4) (detected by the second water amount sensor (15)), the first
and a second valve mechanism (12).

If the above-mentioned adjustment method of changing the operation position change speed of (13) is not adopted, and the amount of hot water supplied to the hot water tap (4) (port 2) is large, the water heater will be adjusted to the set general hot water temperature (Ta). In addition, when the amount of hot water (Qt) supplied to the hot water tap (4) is small, the set general hot water temperature (T
This causes an inconvenience such as a hunting-like phenomenon when adjusting the water heater to a).

Therefore, as mentioned above, the first, second, and third operation areas (
L), (Xz), (XI) When performing reheating hot water supply and general hot water supply in parallel 0), the operating position change speed (first and second valve mechanism (12), (13) Adjustment operation speed) detected by the second water flow sensor (15) Hot water supply 1 (
The larger the Qz), the larger the detected hot water amount (port 2).
The smaller the first and second valve mechanisms (12), the smaller the first and second valve mechanisms (12).

By changing the operating position of (13), the decrease in responsiveness and hunting phenomenon described above can be prevented, and stable hot water supply amount convergence can be achieved regardless of the amount of hot water supplied to the hot water tap (4). It is designed so that it can be used.

-C When transitioning from the state where hot water supply is being carried out independently (a) to the parallel implementation of reheating hot water supply and general hot water supply (n) due to the interruption operation of reheating hot water supply, the heat exchanger (1) is used as described above. At the same time, the amount of hot water supplied from the first and second valve mechanisms (12) and (13) is switched from the set general hot water temperature (Ta) to the higher set reheating hot water temperature (Tc), and the operation positions of the first and second valve mechanisms (12) and (13) are changed to the fourth to fifth positions. The operation range (X4), (Xi) is shifted to the side that allows bypass water supply, and the second water supply temperature is adjusted according to the deviation between the hot water supply amount (T3) detected by the second hot water temperature sensor (14) and the set general hot water temperature (Ta). 1. Second or third operating area (XI), (xz
), (XI), but at this time, the setting of the amount of hot water supplied from the heat exchanger (1) and the reheating hot water temperature (T
Perform general hot water supply alone (c) while limiting the ramp-up speed to the hot water supply amount to the set reheating hot water temperature (Tc) at the start of solo reheating hot water supply (c). The controller (19) is configured to execute the transition from (a) to parallel implementation of reheating hot water supply and general hot water supply (n).

In other words, in the case of reheating hot water only (c), the bathtub (5)
In order to supply high-temperature hot water for reheating (high-temperature hot water) as quickly as possible, the amount of hot water supplied from the heat exchanger (1) is set, and there are particular restrictions on the speed of rising to the reheating hot water temperature (Tc). but do not add
In the case of a transition from general hot water supply alone (A) to parallel implementation of reheating hot water supply and general hot water supply (0), reheating hot water supply alone (C)
If the amount of hot water supplied from the heat exchanger (1) is started at the same start-up speed as when the first and second valve mechanisms (12) and (
13) is much delayed from the rising of the hot water supply amount to the set reheating hot water temperature (Tc), and as a result, the amount of hot water supplied to the hot water tap (4) is temporarily reduced to the set general hot water temperature (Tc).
This leads to inconveniences such as a wide gap from Ta).

Therefore, as mentioned above, when transitioning from general hot water supply alone (a) to parallel implementation of reheating hot water supply and general hot water supply (n),
Setting the amount of hot water supplied from the heat exchanger (1>) Reheating hot water temperature (Tc)
By limiting the start-up speed of the heat exchanger (
1) to suppress the delay in adjusting the operating positions of the first and second valve mechanisms (12) and (13) with respect to the rise in the amount of hot water supplied, and to supply hot water to the hot water tap (4) as described above due to the delay. The purpose is to suppress and prevent temporal deviation from the general hot water supply temperature (Ta) and stabilize the amount of hot water supplied to the hot water tap (4).

As a specific means to limit the ramp-up speed of the amount of hot water supplied from the heat exchanger (1), when starting the independent reheating hot water supply (c), the set reheating hot water temperature (Tc) is set from the start point. While the controller (19) is designed to execute control as the adjustment target hot water supply amount, when transitioning from performing general hot water supply alone (a) to performing reheating hot water supply and general hot water supply in parallel (n), By causing the controller (19) to execute control by gradually increasing the adjusted target hot water supply amount according to a predetermined temporal change pattern and shifting to the set reheating hot water temperature (Tc), This is to limit the rate of increase in the amount of hot water supplied from the exchanger (1).

On the other hand, bath water supply! The third valve mechanism (16) for adjustment is driven and operated by a bath hot water supply side operation motor (30) whose rotation is controlled by a controller (19), and the specific structure of the third valve mechanism (16) is as follows. As shown in Fig. 4 and Fig. 5, from the heat exchanger (1) to the second
An inlet (31) for supplying hot water sent to the hot water supply path (3b).
), and an annular valve seat (34) in a valve case (33) forming an outflow port (32) to the bathtub (5) side (outflow port to the downstream part of the second hot water supply path (3b)). A valve body (35) that adjusts the flow path by cooperation of the valve body (35) is installed inside the valve body (35).
) is equipped with a cylindrical flow rate adjusting part (35a) and a closing part (35b) provided with an annular sealing material (36).

A plurality of notches (37) are formed in the flow rate adjusting part (35a) of the valve body (35), and the opening area of the notch (37) with respect to the upstream chamber (33a) in the valve case (33>) is determined by the valve body. By changing the sliding operation of (35), the amount of hot water (QS) supplied from the heat exchanger (1) (the amount of hot water supplied to the second hot water supply path (3b)) can be changed and adjusted.

Further, regarding the closing part (35b) in the valve body (35), an annular sealing material (
36) is brought into contact with the annular valve seat (34) to block the flow path.

In other words, the third valve mechanism (16), which requires a bath hot water supply shutoff function in addition to adjusting the bath hot water supply amount, has the above-described structure and is a flow rate regulating valve with a closing function.

The sliding operation configuration of the valve body (35) includes a gear mechanism (38
) is provided with a valve stem (40) that is rotated by the bath hot water supply side operation motor (30) and that slides by a threaded structure (39) as the valve rotates, and the tip of this valve stem (40) is connected to the valve. It is inserted into the bottomed insertion hole (41) in the body (35) in a state that allows it to come out.

A spring (42) is provided that always biases the valve body (35) toward the flow path blocking side, so that the valve stem (40) is moved toward the insertion side by rotating the bath hot water supply side operation motor (30) in the positive direction. By sliding the valve body (35) against the spring (42), the valve body (35) is opened, and subsequently moved to the flow rate increasing side, and
By rotating the bath hot water supply side operation motor (30) to the other side and sliding the valve stem (40) toward the withdrawal side, the biasing force of the spring (42) moves the valve body (35) toward the flow rate restriction side. At the same time, the flow path is subsequently cut off.

In the structure of the third valve mechanism (16) (flow rate adjustment valve with a closing function) as described above, the flow path is blocked by the valve body (35) by the biasing force of the spring (42), so that the operating motor The valve body (35) is operated to block the flow path by operating force, and the annular sealing material (
Compared to the type (36) in which pressure seal pressure is applied by motor operation force, it is possible to reliably obtain a predetermined and appropriate pressure seal pressure, thereby ensuring that the flow path is blocked without leakage. This is to prevent early damage to the seal portion due to excessive sealing pressure.

Incidentally, FIG. 6 shows the flow rate adjustment characteristics of the third valve mechanism (16).

[Another example]

Next, another example will be listed.

(a) Hot water supply 1 from the heat exchanger (1st to adjust (14)
Bypass water supply amount from the valve mechanism and bypass path (Q3
) may have different valve bodies, and the specific valve structures of the first valve mechanism and the second valve mechanism can be improved in various ways. .

(b) Various configuration changes can be made to the interlocking structure of the first valve mechanism, the second valve mechanism, and one operating motor that drives and operates them.

(c) Hot water is supplied from the heat exchanger in response to the rotation of the operating motor! (Q4) and bypass water supply amount from bypass path (Q3)
It may be determined as appropriate in what form of change and in what kind of correlation each of them should be changed.

Alternatively, the correlation may be changed.

4 (d) The present invention can also be applied to a type in which a branch hot water supply path is not provided, such as the second hot water supply path (3b) in the above embodiment.

Incidentally, although reference numerals are written in the claims section for convenient comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.

[Brief explanation of drawings]

1 to 6 show embodiments of the present invention, FIG. 1 is an overall configuration diagram, FIG. 2 is a structural diagram of the first and second valve mechanisms, and FIG. 3 is a diagram of the first and second valve mechanisms. FIG. 4 is a structural diagram of the third valve mechanism, FIG. 5 is an enlarged perspective view of the valve body, and FIG. 6 is a graph showing the flow rate adjustment characteristics of the third valve mechanism. (1)...Heat exchanger, (3a)...Hot water supply channel, (6)...... Water supply channel, (7)......
Bypass path, (12)...First valve mechanism, (13
〉...Second valve mechanism, (20)...Operation motor, (24)...Valve body, (Q3)...
...Bypass water supply amount, (Q4)...Hot water supply amount, (
xt), (X3), (xs)...operation area.

Claims (1)

[Claims] 1. In the hot water supply path (3a) from the water heating heat exchanger (1),
A bypass path (7) branched from the water supply channel (6) to the water heating heat exchanger (1) is connected to adjust the amount of hot water (Q_4) supplied from the water heating heat exchanger (1). 1 valve mechanism (
12), and from the bypass path (7) to the hot water supply path (
3a), wherein the first valve mechanism (12) and the second valve mechanism (13) are adjusted in conjunction with each other. A water heater equipped with one operating motor (20) that is operated in a functioning state. 2. A part of the rotation operation range of the operation motor (20),
Either the amount of hot water supplied from the water heating heat exchanger (1) (Q_4) or the amount of bypass water supplied from the bypass path (7) (Q_3) is kept constant with respect to the rotation of the operating motor (20). operation range (X
The water heater according to claim 1, further comprising:_1), (X_2), and (X_3). 3. The first valve mechanism (12) and the second valve mechanism (13)
and the valve bodies are connected to the operation motor (2).
3. The water heater according to claim 1, further comprising one rotary valve body (24) which is interlocked with the water heater.