JP3718191B2 - Hot water mixing valve for water heater - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a hot water mixing valve for a hot water heater that mixes hot water from a hot water heater and water from a water supply source, adjusts the temperature thereof, and causes the water to flow out from an outlet.
[0002]
[Prior art and problems to be solved by the invention]
As shown in FIG. 5, when hot water (hot water) boiled by the hot water supply device 200 is discharged from the hot water mixing valve 202, if the hot water mixing valve 202 is located far from the hot water supply device 200, the hot water mixing valve 202 is used. Even if the opening operation is performed, hot water does not immediately come out, and first, the cold water in the long pipe 204 is discharged from the hot water mixing valve 202.
[0003]
For example, the hot water used by opening the hot and cold mixing valve 202 in the bathroom needs to be at a predetermined temperature or higher (usually about 40 ° C. or higher), and hot water at a temperature lower than that is not used.
Therefore, the cold water coming out from the hot water / mixing valve 202 during the initial period cannot be used, and this is dead water (water discarded as it is).
[0004]
Further, there is a problem that the user of the hot / cold water mixing valve 202 has to wait for a long time until the hot water having the desired temperature comes out of the hot / cold water mixing valve 202.
Therefore, in recent years, in order to solve the problems of the generation of a large amount of wasteful water and a long hot water waiting time, an electric water heater as an immediate hot water supply device is provided near the hot water mixing valve.
[0005]
By the way, the hot water from the electric water heater is usually sent to the hot water mixing valve, where it is mixed with the water sent from the water supply source at a predetermined ratio, discharged at a desired appropriate temperature, and used.
For this purpose, a hot water / water mixing valve disclosed in Patent Document 1 is conventionally known.
[0006]
FIG. 6 shows a hot and cold water mixing valve disclosed in Patent Document 1 below.
In the figure, 206 is a cylindrical casing, and a water inlet 208 and a hot water inlet 210 are formed at predetermined locations.
A valve body 212 is slidably accommodated in the casing 206.
The valve body 212 has a circular outer peripheral surface of the sliding portion 213, and the circular outer peripheral surface is fitted to the circular inner peripheral surface 214 of the casing 206 so as to be watertightly slidable through an O-ring. are doing.
[0007]
In this hot water / water mixing valve 205, the opening of the water inlet 208 and the hot water inlet 210 is slightly reduced simultaneously by the water side valve portion 212A and the hot water side valve portion 212B of the valve body 212 by the slight movement of the valve body 212 in the horizontal direction in the figure. Thus, the mixed water temperature is adjusted by changing the inflow amount of water and the inflow amount of hot water.
The hot water flowing in from the hot water inlet 210 flows into the water channel 218 through the opening 216 formed in the valve body 212, and then flows out from the opening 220 into the mixing chamber 222. And hot water are mixed.
Then, the mixed water flows out from the outlet 224 formed in the casing 206.
[0008]
A temperature sensitive body 226 is accommodated in the mixing chamber 222.
The temperature sensing body 226 contains therein a wax that expands or contracts in accordance with the temperature of the mixed water, and operates to protrude the rod 228 by the expansion of the wax. That is, the temperature sensing body 226 expands or contracts as a whole according to the temperature of the mixed water.
Based on the expansion and contraction, the position of the valve body 212 is slightly adjusted in the horizontal direction in the figure to adjust the amount of water flowing in from the water inlet 208 and the amount of hot water flowing in from the hot water inlet 210.
[0009]
Reference numeral 230 denotes a rotation operation shaft for setting and operating the mixed water temperature. When the rotation operation shaft 230 is rotated by a handle, the cylindrical advance / retreat member 232 moves forward and backward by screw feed in the left-right direction in the drawing.
For example, when the advance / retreat member 232 is pushed rightward in the figure by the rotation operation shaft 230, the temperature sensing body 226 is pushed rightward in the figure via the spring 234, thereby shifting the position of the valve body 212 rightward in the figure. It is done.
The valve body 212 slightly moves in the left-right direction based on the expansion / contraction operation of the temperature sensing body 226 at the shift position, and automatically adjusts the mixed water temperature to the set temperature.
[0010]
In the case of the conventional hot water mixing valve represented by the hot water mixing valve shown in FIG. 6 disclosed in Patent Document 1, the valve body 213 is provided with the water side valve portion 212 </ b> A and the hot water side valve portion 212 </ b> B as described above. 208 and the hot water inlet 210 need to be finely adjusted at the same time, and the water supply pressure and the hot water supply pressure change independently of each other. Become.
[0011]
For this reason, in the case of the conventional hot and cold water mixing valve 205, the structure and mechanism are complicated, the processing accuracy of the casing, valve body and other parts requires high precision, and the number of parts and processing points are large, resulting in the expensive hot water and water mixing valve. It was necessary to enlarge it.
[0012]
[Patent Document 1]
Japanese Utility Model Publication No. 7-7662 [0013]
[Means for Solving the Problems]
The hot and cold water mixing valve for a hot water heater according to the present invention has been made to solve such problems.
Thus, the first aspect of the present invention is a hot water mixing valve that mixes and flows out water supplied from a water supply source and hot water from a water heater, and (a) a mixing chamber for mixing water and hot water; (B) a water supply inlet for supplying water from the water supply pipe, (c) an internal water supply passage formed following the water supply inlet, and (d) a partition wall for partitioning the internal water supply passage and the mixing chamber. (E) a water inlet provided in the partition wall for communicating the internal water supply channel and the mixing chamber to allow water from the internal water supply channel to flow into the mixing chamber; and (f) from the water heater. A hot water inlet for flowing hot water into the mixing chamber, (g) a branched water channel for branching from the internal water supply channel and bypassing the water supply to the water heater side, and (h) keeping the hot water inlet in an normally open state. On the other hand, by changing the opening of the water inlet, the amount of water flowing from the water inlet into the mixing chamber is increased or decreased. Rutotomoni, a valve body for changing up reducing the inflow of water into the water heater through the branch water passage, disposed on (i) to efflux mixed water from said mixing chamber, said water supply inlet is coaxial an outlet provided with a, characterized in that it is directly connected not through the substantially pipe to the front Symbol water heater.
[0014]
[Operation and effect of the invention]
As described above, the present invention utilizes the characteristic that the water heater pushes out the hot water in accordance with the amount of supplied water, and the hot water mixing valve for the water heater has the following configuration, that is, the internal water supply channel and the mixing chamber. The water inlet provided in the partition wall, the branch water channel that branches from the internal water supply channel and bypasses the water supply to the water heater side, the hot water inlet that allows hot water from the water heater to flow into the mixing chamber, and the temperature of the mixed water are adjusted And the valve body keeps the hot water inlet in a normally open state, while changing the opening of the water inlet, thereby allowing water to flow into the mixing chamber from the water inlet. At the same time the amount is changed, the amount of water flowing into the water heater through the branch waterway is changed.
[0015]
In the hot water mixing valve for a hot water heater of the present invention, since the valve body merely changes the opening of the water inlet, the hot water mixing valve can be configured with a simple structure, and its price is low. Can be made.
[0016]
On the other hand, this hot water / water mixing valve can automatically increase or decrease the amount of water flowing into the mixing chamber by changing the opening of the water inlet by the valve body, and at the same time, the amount of water flowing into the water heater In other words, the amount of hot water flowing from the water heater into the mixing chamber can be reduced or increased, and the mixing ratio of water and hot water in the mixing chamber can be adjusted with a simple operation, and the temperature can be adjusted from the outlet to the desired temperature. The adjusted warm water can be discharged .
[0017]
The hot and cold water mixing valve of the present invention has a function of guiding a part of water supplied from a water supply source to the mixing chamber and bypassing the remaining part to the water heater side. a water heater feed water from the branch portion for branching to the hot and cold water mixing valve, needs piping connected separately provided outside of the hot and cold water mixing valve has name. Therefore, the hot and cold water mixing valve of the present invention is directly connected to the water heater as it is .
So that direct connection of the hot and cold water mixing valve to the hot water unit are Thus, substantially becomes possible to integrate the water heater and the hot and cold water mixing valve, downsizing and simplifying the hot-water supply system including a pipe And its cost can be reduced.
[0018]
【Example】
Next, embodiments of the present invention will be described in detail with reference to the drawings.
In FIG. 1, reference numeral 10 denotes an electric water heater, and an electric heater 12 is disposed inside the can body 11.
The electric water heater 10 stores hot water inside the can 11 by the heating action of the electric heater 12.
[0019]
Openings 14 and 16 are provided in the upper part of the electric water heater 10. Water is supplied to the inside from the opening 14, and hot water inside the opening 16 is taken out to the outside.
Here, the water flowing in from the opening 14 is guided by the pipe 18 and flows from the bottom of the can 11 into the inside.
[0020]
A hot water mixing valve 20 is directly connected to the upper surface of the electric water heater 10.
The hot and cold mixing valve 20 has a casing 22, and a pair of fixed flanges 24 extend from the casing 22 as shown in FIG.
Fixing holes 26 are formed in the fixing flange 24, and the hot and cold water mixing valve 20 is fixed to the upper surface of the electric water heater 10 with a fastener such as a screw in these fixing holes 26.
[0021]
FIG. 2 specifically shows the internal structure of the hot and cold mixing valve 20.
As shown in the figure, the hot and cold water mixing valve 20 has a feed water inlet 28 through which the feed water from the feed water pipe flows in at one end in the axial direction, and the mixed water flows out at the opposite end. An outlet 30 is provided.
The feed water inlet 28 and the outlet 30 are provided with external threads 32 on the outer peripheral surface so that they can be connected to piping.
[0022]
Inside the casing 22, an internal water supply passage 34 formed following the water supply inlet 28 and a mixing chamber 36 for mixing water and hot water are formed, and these are partitioned by a partition wall 38. .
A water inlet 40 is formed in the partition wall 38, and water flowing through the internal water supply channel 34 can flow into the mixing chamber 36 from the water inlet 40.
[0023]
From the internal water supply channel 34, a branch water channel 42 that bypasses the water supply to the electric water heater 10 side is formed, and the water supplied through the internal water supply channel 34 passes through the branch water channel 42 to the electric water heater 10. It flows into the inside from the opening 14.
Specifically, water from the branch water channel 42 is pushed out to the bottom of the electric water heater 10 through the pipe 18.
[0024]
The hot water mixing valve 20 also has a hot water inlet 44 communicating with the mixing chamber 36, and a hot water passage 46 is formed through the casing 22 following the hot water inlet 44.
Hot water inside the electric water heater 10 flows from the opening 16 on the upper surface thereof through the hot water passage 46 and into the mixing chamber 36 from the hot water inlet 44.
Incidentally, the space between the branch water channel 42 and the opening 14 and the space between the hot water passage 46 and the opening 16 are water-tightly sealed by O-rings 48 and 50, respectively.
[0025]
A valve body 52 is disposed inside the mixing chamber 36.
The valve body 52 includes a large-diameter valve portion 54 that changes the opening degree of the water inlet 40 formed in the partition wall 38 by movement in the left-right direction in the drawing, and a valve shaft 56 that extends from the valve portion 54 to the right in the drawing. And have.
A plate-like sliding portion 58 is provided at the end opposite to the valve portion 54 of the valve shaft 56, and this sliding portion 58 can slide on the inner surface of the mixing chamber 36 in the left-right direction in the figure. ing.
A communication hole 59 is formed in the sliding portion 58, and the mixed water of water and hot water flowing from the water inlet 40 and the hot water inlet 44 can flow to the outlet 30 through the communication hole 59. Has been.
[0026]
The mixing chamber 36 is provided with a temperature-sensitive spring 60 made of a shape memory alloy as a temperature-sensitive body.
One end of the temperature-sensitive spring 60 is brought into contact with the sliding portion 58 of the valve body 52, and the valve body 52 is biased rightward in the drawing, that is, the valve body 52 is urged in the valve opening direction.
[0027]
The temperature-sensitive spring 60 changes the urging force according to the temperature of the mixed water in the mixing chamber 36. Specifically, when the temperature of the mixed water is high, the spring force increases according to the temperature, and the urging force in the valve opening direction with respect to the valve body 52 is increased.
Conversely, if the temperature of the mixed water is lowered, the spring force is lowered, and the urging force in the valve opening direction with respect to the valve body 52 is weakened.
A bias spring 62 is disposed in the mixing chamber 36 so as to make a pair with the temperature sensitive spring 60, and the biasing force of the bias spring 62 is contracted with respect to the valve body 52, that is, the valve body 52. Is exerted in the direction of closing the valve.
[0028]
As described above, in the case of the hot / cold water mixing valve 20 of this example, the valve body 52 keeps the hot water inlet 44 in an always open state, and changes the opening degree of the water inlet 40 only by axial movement.
Therefore, in the hot and cold water mixing valve 20 of this example, when the water supply from the water supply pipe flows into the water supply inlet 28 with the valve body 52 closed, that is, with the water inlet 40 closed, the entire water supply is branched into the branch water channel 42. Bypass to the electric water heater 10 side. That is, the whole flows into the electric water heater 10.
[0029]
Then, the hot water in the electric water heater 10 is pushed out of the electric water heater 10 by the amount of water flowing into the electric water heater 10 and flows into the mixing chamber 36 from the hot water inlet 44, and flows through the mixing chamber 36 as it is from the outlet 30. leak. That is, when the valve body 52 completely closes the water inlet 40, only hot water flows out from the hot water / mixing valve 20.
[0030]
On the other hand, when the valve body 52 is in a fully open state, that is, in a state in which the valve portion 54 completely opens the water inlet 40, almost all of the water supplied from the water inlet 28 flows into the mixing chamber 36 through the water inlet 40. Then, it flows out from the outlet 30 through the mixing chamber 36 as it is.
[0031]
This is because the diameter α of the water inlet 40 is made larger than the diameter β of the branch water channel 42, and the flow of water flowing into the electric water heater 10 through the branch water channel 42 is increased inside the electric water heater 10. This is because the resistance to push out hot water works greatly.
That is, when the water inlet 40 is in a fully opened state, almost the entire water supply that has flowed into the internal water channel 34 enters the mixing chamber 36 from the water inlet 40 due to the difference in diameter and the resistance of hot water in the electric water heater 10. .
[0032]
The opening degree of the valve body 52 is controlled by the biasing force of the temperature-sensitive spring 60 and the biasing force of the bias spring 62.
That is, if the mixed water temperature is higher than the set temperature, the urging force of the temperature sensing spring 60 overcomes the urging force of the bias spring 62, and the valve body 52 is pushed rightward in the figure, thereby opening the water inlet 40. Changes widely and the amount of water flowing into the mixing chamber 36 increases.
[0033]
On the other hand, if the temperature of the mixed water is lower than the set temperature, the urging force of the temperature-sensitive spring 60 is reduced, and the urging force of the bias spring 62 is relatively increased, whereby the valve body 52 moves in the left direction in the figure. As a result, the opening of the water inlet 40 changes slightly, and the amount of water flowing into the mixing chamber 36 through the water inlet 40 decreases.
[0034]
Thus, in this example, by appropriately adjusting the urging force by the temperature-sensitive spring 60 and the bias spring 62, the opening degree of the water inlet 40 by the valve body 52 is appropriately set, and the outlet 30 The mixed water at a desired temperature can always be discharged.
The outlet 30 is separated from the main body of the casing 22 and is screwed to the main body of the casing 22.
[0035]
In the hot and cold water mixing valve 20 of this example, since the valve body 52 merely changes the opening degree of the water inlet 40, the hot and cold water mixing valve 20 can be configured with a simple structure and its price is low. Can be
[0036]
On the other hand, the hot water / water mixing valve 20 automatically changes the amount of water flowing from the water inlet 40 to the mixing chamber 36 and the amount of hot water from the electric water heater 10 to the mixing chamber 36 when the opening of the water inlet 40 is changed by the valve body 52. The ratio of the inflow amount can be adjusted, and the mixed water having a desired temperature can be discharged from the outlet 30.
[0037]
Further, in this example, the valve body 52 has a valve portion 54 and a valve shaft 56, and the opening degree of the water inlet 40 is changed by the advance and retreat in the axial direction. Therefore, the valve body 52 and the entire structure including the valve body 52 are provided. Can be made a simpler structure.
[0038]
Moreover, the hot water mixing valve 20 of this example can branch the water supply from a water supply source, and can supply it to the mixing chamber 36 and the electric water heater 10, Therefore, the water supply from a water supply source can be connected with an electric water heater conventionally. There is no need to separately provide a branch portion for branching to the hot water mixing valve outside the hot water mixing valve, and the hot water mixing valve 20 can be directly connected to the electric water heater 10 as it is.
[0039]
Thus, by directly connecting the hot water / water mixing valve 20 to the electric water heater 10, the electric water heater 10 and the hot / cold water mixing valve 20 can be substantially integrated.
In other words, the electric water heater 10 itself can be configured as having the hot water mixing valve 20, the hot water supply system including the pipe can be reduced in size and simplified, and the cost can be reduced. .
[0040]
In the above example, only the water inlet 40 is changed in opening degree by the valve portion 54 to adjust the temperature. However, the water inlet 40 is fully opened, and the diameter of the branch water channel 42 to the electric water heater is the water inlet. When the diameter is larger than 40, a part of the hot water from the electric water heater 10 flows into the mixing chamber 36 and the water discharge temperature is higher than the desired minimum temperature. In order to cope with this, as shown in FIG. 3, a second valve portion 64 that interlocks with the valve portion 54 is provided, and in conjunction with the change of the opening of the water inlet 40 at the valve portion 54 to the open state, If the valve part 64 of 2 changes so that the opening degree of the branch water channel 42 may be restrict | squeezed to a closed state, when the water inflow port 40 is a full open state, the branch water channel 42 can be made into a fully closed state, and the electric water heater 10 Hot water can be prevented from flowing into the mixing chamber 36. By doing in this way, the better temperature control function which is not related also to the aperture ratio of the water inflow port 40 and the branch water channel 42 is obtained.
[0041]
FIG. 4 shows a reference example.
In the figure, reference numeral 22 denotes a casing in the hot and cold water mixing valve 20, which partitions the water supply port 28, the mixed water outlet 30, the internal water supply channel 34 formed following the water supply port 28, the water supply channel 34 and the mixing chamber 36. A partition wall 38, a water inlet 40 formed in the partition wall 38, a hot water inlet 44 through which hot water from the electric water heater 10 flows into the mixing chamber 36, a hot water passage 46 formed upstream thereof, and internal water supply A branch water channel 42 is branched from the channel 34 and bypasses the water supply from the water supply port 28 to the electric water heater 10 side.
[0042]
52 is a valve body having a valve portion 54 for changing the opening degree of the water inlet 40 and a valve shaft 56, 66 is a spindle shaft for operating the valve body 52 to the pushing side, and 68 is for rotating the spindle shaft 66. It is a handle.
Here, the spindle shaft 66 has a male screw 70 on the outer periphery, and the male screw 70 is screwed into a female screw 72 formed on the inner peripheral surface of the casing 22. Move forward and backward in the vertical direction.
[0043]
The valve body 52 is pushed downward in the figure by the spindle shaft 66, that is, in the valve closing direction. It is pushed upward in the figure.
[0044]
The hot and cold water mixing valve 20 in this example adjusts the position of the valve body 52 by rotating the handle 68, and by setting the opening degree of the water inlet 40 by the valve body 52 to an appropriate opening degree, the same as described above. Thus, the mixed water having a desired temperature can be discharged from the outlet 30.
[0045]
Although the embodiments of the present invention have been described in detail with reference examples which Ri merely an exemplification, the present invention can be configured in a form in which various modifications within a scope not departing from the gist.
[Brief description of the drawings]
FIG. 1 is a view showing a hot and cold water mixing valve according to an embodiment of the present invention together with an electric water heater.
FIG. 2 is an enlarged view showing the internal structure of the hot and cold mixing valve of the same embodiment.
FIG. 3 is a view showing a hot and cold water mixing valve according to another embodiment of the present invention.
FIG. 4 is a view showing a hot and cold water mixing valve of a reference example.
FIG. 5 is a diagram showing a state in which a conventional hot-water mixing valve and hot-water supply equipment are connected by piping.
6 is a diagram showing an example of what is conventionally used as the hot and cold water mixing valve in FIG. 5. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Electric water heater 20 Hot water mixing valve 28 Feed water inlet 30 Outlet 34 Internal water supply channel 36 Mixing chamber 38 Partition wall 40 Water inlet 42 Branch water channel 44 Hot water inlet 52 Valve body 54 Valve part 56 Valve shaft 60 Temperature sensing spring 64 1st 2 valves

Claims (1)

A hot water mixing valve that mixes and discharges water from a water supply source and hot water from a water heater,
(B) a mixing chamber for mixing water and hot water; (b) a feed water inlet for feeding water from a feed water pipe; (c) an internal water channel formed following the feed water inlet; A partition wall that partitions the water supply channel and the mixing chamber; and (e) a water flow that is provided in the partition wall and that allows water from the internal water supply channel to flow into the mixing chamber by communicating the internal water supply channel and the mixing chamber. An inlet, (f) a hot water inlet through which hot water from the water heater flows into the mixing chamber, (g) a branch water channel that branches off from the internal water supply channel, and bypasses the water supply to the water heater side; While maintaining the inflow port normally open, the opening of the water inflow port is changed, the amount of water flowing into the mixing chamber from the water inflow port is increased or decreased, and the water heater through the branch water channel is changed. The valve body that reduces and changes the inflow of water and (li) the mixed water from the mixing chamber Causing out, the water supply inlet and has an arranged outlet coaxially water heater hot and cold water mixing valve, characterized in that it is connected directly without the intervention of the substantially pipe to the front Symbol water heater .

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