JPH04350415A - Hot water temperature adjusting device for gas water boiler - Google Patents

Abstract

PURPOSE:To provide an adjustment device for use in adjusting a hot water temperature by cooperating a hot water amount adjusting valve 21 inserted into a water circuit 2 with a gas amount adjusting valve 11 inserted into a gas circuit 1 by a method wherein a hot water feeding condition with a small amount of hot water at each of set temperatures can be set to enable a useless usage of hot water to be prevented. CONSTITUTION:The first flow rate throttle means 3a separate from a gas volume adjusting valve 11 is inserted into a circuit 1, and the second flow rate throttle means 3b separate from a water amount adjusting valve 21 is inserted into a water circuit 2, respectively. Then, the first and second flow rate throttle means 3a, 3b are of such a configuration as one in which two conditions of throttled or unthrottled conditions can be set. They may be operated concurrently to set to the same conditions from an external device. A maximum flow rate in the gas circuit 1 at the throttled condition is set to a predetermined value less than a flow rate set in reference to a nozzle diameter of a burner and at the same time a minimum flow rate of the water circuit 2 under the aforesaid throttled condition is set to a predetermined value less than the minimum flow rate value when the second flow rate throttled means 3b is in its non-adjusted condition.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to a hot water temperature regulating device for a gas water heater, which enables hot water to be dispensed at a low temperature and with a small amount of water, thereby preventing wasteful consumption of water and gas. .

0002

BACKGROUND OF THE INVENTION A hot water temperature regulating device for a gas water heater has already been disclosed in Japanese Utility Model Publication No. 58-25241. In this conventional system, as shown in Fig. 9, a gas flow control valve (11) is provided in the gas circuit (1), and a water flow control valve (21) is also provided in the water circuit (2), and both of these control valves are They are placed in a certain interlocking relationship.

[0003] In this conventional system, the interlocking relationship is set so that it can be changed from a large water flow/small gas flow state to a small water flow/large gas flow state, and under the former setting condition, low temperature hot water is In the latter setting condition, a small amount of high-temperature hot water is taken out, and the temperature of the hot water can be adjusted during this time. In this case, the hot water temperature adjustment range is wider than in a system in which only the amount of water is adjusted while keeping the amount of gas constant.

[0004] However, with this conventional system, as mentioned above, when taking out hot water in a low temperature range, the amount of hot water at that time is large, so depending on the usage conditions, the amount of hot water may be excessive and the hot water may be wasted. consumed. The present invention is directed to such a device that adjusts the temperature of hot water by interlocking the hot water flow control valve (21) inserted into the water circuit (2) and the gas flow control valve (11) inserted into the gas circuit (1). The technical problem is to be able to set the hot water supply conditions for a small amount of hot water at each set temperature in order to prevent the wasteful use of hot water.

[0005]

[Technical Means] The technical means of the present invention taken to solve the above technical problem is as follows: ``The gas circuit (1) has a position that can restrict the amount of gas flowing into the gas amount control valve (11). a separate first flow restricting means (3a) in the water circuit (2).
Separate second flow rate restricting means (3b) are respectively inserted in positions that can restrict the amount of water flowing into the water volume control valve (21), and these first and second flow rate restricting means (3a) (3b) are in a throttled state. It has a configuration that can be set to two states, ie, a non-throttled state, and a non-throttled state, and can be operated simultaneously from the outside to the same state, and the maximum flow rate of the gas circuit (1) in the throttled state is set to a predetermined flow rate or less set by the nozzle diameter of the burner. In addition, the minimum flow rate of the water circuit (2) in the throttled state is set to a predetermined value that is less than the minimum flow rate when the second flow rate restricting means (3b) is in the non-throttled state. be.

[0006]

[Operation] The above technical means of the present invention operates as follows. When the two first and second flow rate restricting means (3a) and (3b) are both in the non-restricted state, the flow rates of the gas circuit (1) and the water circuit (2) are both in the non-restricted state, so the gas amount control valve (11) The hot water temperature is adjusted by adjusting the water flow control valves (21) in conjunction with each other, that is, by operating the hot water temperature adjusting device, and the hot water temperature is the same as in the conventional case.

Next, the first and second flow restricting means (3a)
(3b) is put into the throttle state, the first flow rate restricting means (3a
) is located at a position where the amount of gas flowing into the gas amount regulating valve (11) can be restricted, and the second flow rate restricting means (3b) is located at a position where the second flow rate restricting means (3b) is located at a position where the amount of gas flowing into the gas amount regulating valve (11) can be restricted.
1), the flow rate is adjusted by these operations in a state where the amount of water flowing into each control valve is restricted.

Further, the maximum flow rate of the gas circuit (1) in the throttled state is set to a predetermined value that is lower than the flow rate set by the nozzle diameter of the burner. By the way, in a gas burner, the maximum amount of gas that can be combusted is determined by the nozzle facing it, so the gas circuit (1
) In the adjustment range of the gas amount control valve (11), the gas flow rate changes in a range from a large flow rate to a small flow rate that is less than the maximum value. Furthermore, since the minimum flow rate of the water circuit (2) in the throttled state is set to a predetermined value below the minimum flow rate value when the second flow rate restricting means (3b) is in the non-throttled state, the water circuit (2) The amount of water may be set to be reduced. Therefore, the amount of hot water is reduced, and the temperature of the hot water at this time matches the adjustment conditions of the gas amount regulating valve (11) and the water amount regulating valve (21).

[0009]

[Effects] Since the present invention has the above configuration, it has the following unique effects. Gas flow control valve (11), water flow control valve (21)
) In addition to adjusting the hot water temperature by adjusting only the first and second flow rate restricting means (3a) and (3b), the small water amount-small gas amount state can be set by simultaneously operating the first and second flow rate restricting means (3a) and (3b). By the operations (3a) and (3b), it becomes possible to set the hot water temperature according to the conditions of use, and it is possible to prevent wasted use of hot water.

(Embodiments) The embodiments of the present invention are as follows:
The gas circuit (1) and the water circuit ( 2) The flow rate in each of the above states is set to a predetermined value.

According to this embodiment, when the first and second flow rate restricting means (3a) and (3b) are set to the restricted state and a small water flow state is established, the first and second flow rate restricting means (3a) )
The hot water temperature is the same in both the normal usage conditions (3b) in the non-throttled state, and the hot water temperature display on the operating section of the hot water temperature adjustment device and the hot water temperature match in both usage conditions. Therefore,
This eliminates the inconvenience that the hot water temperature changes when changing from a normal usage state to a low water flow state.

0012

[Embodiment] In the embodiment shown in FIG.
) is inserted in series with the first throttle valve (33) serving as the first flow rate restricting means (3a), and a second restricting valve (33) serving as the second flow rate restricting means (3b) is inserted in series with the water flow rate regulating valve (21).
34) and connect the first throttle valve (33) and the second throttle valve.
The valve stem of the throttle valve (34) is connected to the connecting plate (41) so that it can be set to a throttle state and a non-throttle state at the same time, and by setting both to the throttle state, a small water flow state can be obtained. It will be done.

[0013] In this embodiment, the leaf spring (7)
(7) The first throttle valve (33) and the second throttle valve (34) are configured to be set in two states by a snap action mechanism using
0), the leaf springs (7) (7) become in the state shown by the two-dot chain line in the figure, and the first throttle valve (33) and the second throttle valve (34) become non-throttling states. Conversely, from this state, the operation section (40)
When pushed in, the gas circuit (1) communicates only through the first hole (14) provided in the first throttle valve (33), while the water circuit (2) communicates with the second throttle valve (34). 2nd hole (15)
gas circuit (1) and water circuit (2).
) becomes the aperture state.

Next, the gas amount control valve (11) is a needle valve that moves forward and backward by the rotation of its shaft, and the other water amount control valve (21) is a type whose opening degree changes depending on the rotation angle at a fixed position. These gas flow control valves (11) and water flow control valves (21) are configured to change their opening degrees simultaneously by an interlocking mechanism, and this interlocking mechanism includes a rack (61) and a rack (61). The meshing pinion (
62) (63), this rack (
The operation knob (65) provided at 61) serves as the operation section of the hot water temperature adjustment device.

A temperature display section (64) is provided near the operating knob (65) of the rack (61) as shown in FIG. This corresponds to the hot water temperature during normal use when the valve is open. Further, the tapped water temperature is designed to change linearly as shown by the solid line in FIG. 2(A). For this reason, the pinion (62
), (63) are set to a predetermined ratio, and the rack (6
1), the gas flow control valve (11) and water flow control valve (
21), the rotation amount ratio, that is, the degree of change in the aperture amount is correlated. Here, the maximum flow rate (Q2) of the gas circuit (1) is determined by the nozzle (N) of the gas burner [hot water temperature adjustment in non-throttled state]. ) (34), the hot water temperature is adjusted as follows.

Under this condition, the amount of water in the water circuit (2) changes as shown in (A) in FIG. 2 depending on the amount of operation of the operation knob (65).
The change in the amount of gas in the gas circuit (1) is shown by the dashed line in (A) of the same figure. In other words, since the first throttle valve (33) is in the open state, the maximum amount of gas supplied to the burner (4) via the gas amount adjustment valve (11) corresponds to the amount of gas supplied to the burner (4). This is the maximum gas amount (Q2) set by the nozzle (N). Therefore, at the zero point of the operation amount of the operation knob, the burner (4)
The amount of gas supplied to the gas becomes the minimum flow rate value (Q1) through the gas amount control valve (11), and reaches the maximum gas amount (Q2) at which the operation amount reaches the specific point (P). Even if the operation amount is increased, the gas amount does not change.

[0017] At this time, since the second throttle valve (34) is open, the water volume in the water circuit (2) is controlled by the water volume control valve (34).
This corresponds to the degree of adjustment in 21). As shown in the figure, the opening degree change of the second throttle valve (34) is set to the maximum flow rate (Q5) when the manipulated variable is below a specific point (P), and when the manipulated variable is greater than this, it changes in a straight line. The flow rate is set so that the flow rate decreases and becomes the minimum flow rate (Q4) at the maximum operation amount position of the operation knob.

Therefore, the operating amount of the operating knob is at a specific point (P
), the gas volume changes and the hot water temperature changes linearly under the condition that the water volume is constant, and in the area where the amount of operation is greater than this, the water volume changes and the hot water tap temperature changes under the condition that the gas volume is constant. Changes linearly. [Adjusting hot water temperature in throttle state] Next, adjust the first and second throttle valves (33
) (34) is in the closed state, the hot water temperature is adjusted as follows.

The maximum value of the flow rate of the gas circuit (1) in the throttled state is smaller than the maximum value set only by the nozzle, and the flow rate set by the first hole (14) (Q6
), and as a result, the flow rate flowing into the gas amount control valve (11) is restricted. Therefore, when the gas amount control valve (11) is operated in this throttled state, the flow rate changes as shown by the broken line in FIG. 2(B). In addition, the flow rate of the water circuit (2) in the throttled state is the same as that of the second hole (1).
5), and this flow rate is shown in the same figure (
B) becomes a constant value (Q3) as shown by the dashed line.

In this case, when the amount of hot water is small, as shown by the solid line (B) in the figure, when the manipulated variable exceeds a specific point (P1), the maximum temperature remains constant regardless of the adjustment of the hot water temperature control device. A state will occur in which the value of is maintained. In the second embodiment shown in FIG. 4, the valve body of the gas governor (35) employed in a normal gas water heater corresponds to the first throttle valve (33) in the first embodiment, and the water circuit side is opened. The valve body on the water circuit side of the water pressure-responsive gas valve (38) that automatically opens the gas circuit when
4), and the secondary circuit of the gas governor (35) is connected to the gas circuit of the hydraulically responsive gas valve (38).

The gas governor (35) and the hydraulically responsive gas valve (38) have a well-known configuration, and by adjusting the secondary pressure adjustment spring, that is, when the biasing force of this spring is set large, the secondary pressure can be adjusted. increases, and the flow rate to the secondary side increases. Conversely, when the biasing force of the secondary pressure adjustment spring is set to a small value, the secondary pressure decreases and the flow rate to the secondary side decreases. . In this embodiment, the first and second flow rate restricting means (3a) (3b) utilize this effect.

For this purpose, the first spring holder (37a) is brought into contact with the secondary pressure adjustment spring (36) of the gas governor (35), and on the other hand, the secondary pressure adjustment spring (39) of the water pressure responsive gas valve (38) is placed in contact with the secondary pressure adjustment spring (36) of the gas governor (35). ) is brought into contact with a second spring press (37b), these spring presses are connected by a connecting plate (41), and the mechanism section (42) is made to correspond to this operating shaft (43). As the mechanism section (42), any known mechanism can be used as is. For example, as shown in FIG. 4
A pin (46) that is fixed near the operating shaft (43) and protrudes from the operating shaft (43) is fitted into this cam groove (44) to constantly apply a biasing force in the return direction to the spring (47) on the operating shaft (43). It is possible to adopt a configuration that makes it work.

In this case, when the operating shaft (43) is pushed in and set in this pushed state by the mechanism (42), the secondary pressure adjustment springs (36) and (39) are both strongly biased, and the gas circuit ( 1) and the water circuit (2) are in a non-throttled state. This state corresponds to the normal usage state. From this state, when the operating shaft (43) is pushed in, the first spring holder (37a) and second spring holder (37b) are moved by the action of the mechanism (42).
returns to its initial state and the secondary pressure adjustment springs (36) (39)
) becomes weakly energized. This allows the water pressure responsive gas valve (3
8), the gas pressure flowing into the gas amount control valve (11) in the hot water temperature control device is set to be low, and accordingly, the gas amount set by the gas amount control valve (11) is set to a low level. It is reduced over the entire adjustment range by the quantity control valve (11). At this time, since the gas pressure itself through the gas amount control valve (11) becomes low, the flow rate change due to the operation of the gas amount control valve (11) has the same tendency in the gas amount range where it is smaller than during normal use. shows the change in

The water pressure flowing into the other water flow control valve (21) is similarly set low, and the water flow control valve (21)
) is also reduced over the entire range of adjustment by this water flow control valve (21). In this way, the gas circuit (1) and water circuit (2) are in a throttled state and can be used with a small amount of hot water. In this throttling state, the graphs of changes in the amount of gas and water (broken line in (A) and dashed-dotted line in (A)) corresponding to the amount of operation of the operating knob in the non-throttling state are shifted downward in parallel, This is shown by the broken line in (B) or the dashed-dotted line in (B) shown in FIG. At this time, the line (A) and (B)
The parallel movement distance with the line is the secondary pressure adjustment spring (36) (
39) The flow rate value (Q) corresponds to the amount of change in secondary pressure due to change in biasing force.

In the case of this embodiment as well, the secondary pressure adjustment spring (3
6) In the non-restricted state where both (39) are in the strongly biased state, the gas amount and water amount change in the same way as in the case of FIG. 2, and the hot water temperature also changes linearly, as shown by the solid line. still,
In a bypass heating type water heater, the second flow rate restricting means (3b) may be inserted into the bypass water circuit (70) without passing through the heat exchanger (71), as shown in FIG.

Furthermore, the circuit configuration on the downstream side of the water flow control valve (21), as shown in FIG. 8, includes a large flow circuit (22) and a small flow circuit (23) bypassing this and inserting an orifice (24).
It is also possible to form a combined flow path with an on-off valve (32) for opening and closing the large flow rate circuit (22). In this case, when the on-off valve (32) is closed, the small flow circuit (2
The flow rate set by the orifice (24) in step 3) will flow to the heat exchanger side, and the water circuit (2) will be in a throttled state.

In this device, a combination of an on-off valve (32) for opening and closing the large flow rate circuit (22) and a small flow rate circuit (22) equipped with an orifice (24) is the second flow rate restricting means (3b).
becomes.

[Brief explanation of drawings]

[Fig. 1] An explanatory diagram of main parts of a gas circuit and a water circuit according to a first embodiment of the present invention.

[Figure 2] Figure 2 is an explanatory diagram showing changes in hot water temperature, gas amount changes, and water amount changes due to hot water temperature adjustment.

[Figure 3] Explanatory diagram of the operation knob (65) and water temperature display

[Figure 4
] Main part explanatory diagram of the second embodiment

[Fig. 5] An explanatory diagram of the main parts of the mechanism section (42)

FIG. 6 is an explanatory diagram showing changes in hot water temperature, gas amount, and water amount due to hot water temperature adjustment in the second embodiment.

[Fig. 7] Main part explanatory diagram of another embodiment

[Fig. 8] Another example of the second flow restricting means (3b)

[Fig. 9] Explanatory diagram of conventional example

[Explanation of sign]

(1)...Gas circuit (11)...Gas amount control valve (2)...Water circuit (21)...Water flow control valve (3a)...first flow rate restricting means (3b)...first flow restricting means (33)...First throttle valve (34)...Second throttle valve

Claims (1)

[Claims] ■ The water temperature is adjusted by interlocking the water flow control valve (21) inserted into the water circuit (2) and the gas flow control valve (11) inserted into the gas circuit (1). In the water circuit equipped with a hot water temperature regulating device, a separate first flow rate restricting means (3a) is provided in the gas circuit (1) at a position capable of restricting the amount of gas flowing into the gas amount regulating valve (11), and the water circuit (2) Separate second flow rate restricting means (3b) are inserted in positions that can restrict the amount of water flowing into the water volume control valve (21), and these first and second flow rate restricting means (3a) (3b) The gas circuit (1) has a configuration in which it can be set to two states, a throttled state and a non-throttled state, and can be operated into the same state simultaneously from the outside, and the maximum flow rate of the gas circuit (1) in the throttled state is the flow rate set by the nozzle diameter of the burner. In addition to setting the minimum flow rate of the water circuit (2) in the throttled state to a prescribed value below the minimum flow rate value when the second flow rate restricting means (3b) is in the non-throttled state. Water temperature adjustment device for gas water heaters. ■ The gas circuit (1
) and the water circuit (2) in each state are set to predetermined values. ■ The first flow rate restricting means (3a) is connected to the gas flow rate control valve (
A first throttle valve (33) is installed in series with the water flow rate regulating valve (21) and can be set in two states, a throttle state and a non-throttle state. Claim 1: A second throttle valve (34) that is provided and can be set to two states: a throttle state and a non-throttle state.
A water temperature adjustment device for a gas water heater as described in 2. ■ The first flow restricting means (3a) is connected to the gas circuit (1).
The gas governor (
35) and a first spring holder (3) that sets the secondary pressure adjustment spring (36) of this gas governor to a strongly biased state and a weakly biased state.
7a), and the second flow restricting means (3b) is connected to the water circuit (
2) The water pressure-responsive gas valve (38) provided upstream of the water flow control valve (21) and the secondary pressure adjustment spring (39) of this water-pressure-responsive gas valve (38) are in a strongly biased state and a weakly biased state. The gas water heater according to claim 1 or 2, further comprising: a second spring holder (37b) set at hot water temperature adjustment device.