JPH0658446A - Electric mixing valve - Google Patents

Abstract

PURPOSE:To conduct mixing with a desired mixing rate between hot and cold water and water cutoff through one driver along by making high temperature hot water avoiding mixing with water feedable to a heat exchanger or a hot water tap, and making a mixing valve itself equipped with the functions of a stop valve. CONSTITUTION:A cold water passage 40 leading to a coupling pipe part 4c with a cold water inlet C, a hot water passage 41' leading to a coupling pipe part 4b with a hot water inlet H and a valve chest 42 whose upper end side is connected to the cold water passage and the lower end side to the hot water passage respectively are all installed in the inner part of a mixing valve body 4a. A first valve element 44 whose upper surface side is opposed to a first valve seat (w) and a second valve element 45 whose upper surface side is opposed to a second valve seat (y) both are installed in this valve chest, while there is provided a valve stem 47 which goes up and down by a driving part 4d, making it pierce through each shaft center part of both these valve elements free of slide motion, and two butting members 48, 49 are attached to both lower end and upper end sides of the valve stem, and then an interconnecting port 430 of a mixing water passage leading to a mixing water outlet is installed in space between both these first and second valve elements.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to hot water heated by a heat source machine such as a boiler and mixed with water to obtain hot water having a desired temperature.
In order to select the temperature of the hot water to any temperature from water to hot water when using it by guiding it to a hot water tap through piping or when circulating it in a heat exchanger such as a fan coil / floor heating panel by a circulation circuit. The present invention relates to an electric mixing valve connected to a hot water supply pipe or a circulation circuit pipe for stopping water.

[0002]

2. Description of the Prior Art Hot water heated by a heat source is mixed with water to obtain hot water having a desired temperature, and the temperature of the hot water when the hot water is introduced into a hot water supply pipe or a pipe such as a circulation circuit of a heating device for use. In the prior art, as shown in FIG. 1, the heat source unit 1 such as a boiler is used for hot water supply.
The hot water supply pipe 20 connected to the hot water supply port 10 of the above is connected to the hot water inlet H of the mixing valve MV, and the pipe 21 is connected to the tap.
2 for connecting to the water inlet C of the mixing valve MV and to the mixed water outlet M of the mixing valve MV
2 is connected to a stop valve SV1 formed of an electromagnetic valve to guide the hot water supply tap, and further, from a pipe 20 connecting the hot water supply port 10 of the heat source device 1 and the hot water inlet H of the mixing valve MV, mixed water of the mixing valve MV is supplied. Piping 22 connected to outlet M
Between the bypass valve 2 and the mixing valve MV
3 is connected, and a stop valve SV2, which is an electromagnetic valve, is connected to this, so that the temperature of hot water is selected and water is stopped. In this case, the bypass line 23 and the stop valve SV2 may be omitted.

In the case of circulating the heat to the heat exchanger of the heating device, the hot water supply pipe 20 connected to the hot water supply port 10 of the heat source device 1 such as a boiler is connected to the mixing valve MV as shown in FIG. The pipe 22 connected to the hot water inlet H and connected to the mixed water outlet M of the mixing valve MV is connected to the inlet of the heat exchanger 3 via the stop valve SV1 composed of a solenoid valve, and the outlet of the heat exchanger 3 The pipe 24 connected to
It is connected to the return port 11 of the heat source device 1 via the circulation pump P, is connected to the water inlet C of the above-mentioned mixing valve MV via the branch pipe 25, and is further mixed between the hot water supply pipe 20 and the pipe 22. A bypass line 23 that straddles the valve MV is connected, and a stop valve SV2 that is an electromagnetic valve is connected to this.
Are connected, whereby the temperature of hot water circulated in the heat exchanger 3 is selected and the water is stopped.

[0004]

A heat source device 1 such as a boiler
When the hot water boiled in step 1 is mixed with water to be used as hot water of a desired temperature, the mixing valve MV for selecting the temperature of the hot water and the stop valve SV1 for stopping the water are required as described above. Then, in order to make heating by circulating hot water to the heat exchanger 3 such as a floor heating panel move as quickly as possible, it is possible to circulate hot water to the heat exchanger 3 so as to improve the start-up characteristics in the early stage of heating. In that case, the bypass line 23 and the stop valve SV2 connected thereto are required.

When these are provided on the way of piping and are operated remotely, the mixing valve MV and the stop valves SV1 and SV2 need to be configured to be operated by an electric valve / solenoid valve. There is a problem that it becomes complicated and at least a plurality of electric valves and solenoid valves are required.

The present invention has been made in order to solve these problems occurring in the conventional means, and does not use the bypass conduit 23 and the bypass valve SV2 to avoid mixing with water at a high temperature. Hot water can be supplied to the heat exchanger 3 or the hot water tap, and the mixing valve MV itself has a function of a stop valve, and the stop valve SV1 formed of a solenoid valve is omitted, and the hot water is driven by one driving body. It is an object of the present invention to provide a new means for mixing water and water in a desired ratio and stopping water.

[0007]

In the present invention, as means for achieving the above-mentioned object, a low temperature communicating with a joint pipe part having a low temperature water inlet on the upper side inside the mixing valve main body is provided. A water passage is provided, and a high temperature water passage is provided on the lower side that communicates with the joint pipe section that has a high temperature water inlet.In the middle part, the upper end is in communication with the low temperature water passage through the communication port, and the lower end is through the communication port. A valve chamber communicating with the water passage is provided, and in the valve chamber, a first valve body having an upper surface side facing a first valve seat provided on the side closer to the communication port with the low temperature water passage, and the high temperature inside the valve chamber. A second valve body having an upper surface facing a second valve seat provided on the side closer to the communication port with the water passage, and a valve shaft vertically moved by a drive unit assembled on the upper surface side of the mixing valve body. Is provided, and slidably penetrates through the axial center portions of the first valve body and the second valve body, An abutting member that abuts the lower surface side of the second valve body at the lower end side of the valve shaft, and an abutting member that abuts the upper surface side of the first valve body at the upper end side, A spring for biasing the body and the second valve body in the direction of separating them is interposed,
In the valve chamber, an electric mixing valve is provided in which a communication port of a mixing water passage communicating with the mixing water outlet is opened between the first valve body and the second valve body.

[0008]

Embodiments Next, embodiments will be described in detail with reference to the drawings. The same reference numerals are used for the constituent elements having the same effect as those of the conventional means.

FIG. 3 is a development view of a heating device for implementing the electric mixing valve A according to the present invention. In FIG. 3, 1 is a heat source device comprising a boiler, 2 is a circulation circuit of hot water connected to the heat source device 1, Reference numeral 20 denotes a hot water supply port 10 of the heat source device 1 of the circulation circuit 2.
Hot water supply pipe connected to, 24 pipes connected to the return port 11 of the heat source device 1, 3 ... Heat exchangers connected in parallel to the circulation circuit 2 and provided in triplicate, P is a circulation pump, A is the present invention , H is a high temperature water inlet of the electric mixing valve A, C is a low temperature water inlet, M is a mixed water outlet, 22 ...
, A pipe connecting the mixed water outlet M of the heat exchanger 3 to the inlet of the heat exchanger 3, and 25 is branched from the middle of the pipe 24 connecting the outlet of the heat exchanger 3 and the return port 11 of the heat source device 1. The branch pipe connected to the low temperature water inlet C of the said electric mixing valve A is shown. The hot water supply pipe 2 connected to the hot water supply port 10 of the heat source device 1
0 is connected to the high temperature water inlet H of the electric mixing valve A.

FIG. 4 is a partially cutaway front view of the electric mixing valve A according to the present invention, and FIG. 5 is a partially cutaway side view of the same. The electric mixing valve A shown in FIG. 4 has the circulation circuits 2 of hot and cold water connected to one heat source unit 1 as shown in FIG. 3 with the circulation paths of the three heat exchangers 3 connected in parallel. In order to control each independently, three mixing valve bodies 4a ... Corresponding to each circulation path are assembled and assembled into one electric mixing valve A.

That is, the electric mixing valve A according to the present invention is
Basically, as shown in FIGS. 6 and 10, the mixing valve main body 4a and the high temperature water inlet H provided on the outer surface side of the mixing valve main body 4a.
The connecting pipe portion 4b including the above, the connecting pipe portion 4c including the low temperature water inlet C, and the drive portion 4d assembled on the upper surface side of the mixing valve body 4a. The form shown in FIG. 6 is a parallel set type, and the form shown in FIG. 10 is a single type.

The mixing valve main body 4a and the connecting pipe portions 4b and 4c respectively provided on the outer surface side of the mixing valve main body 4a are configured to be integrally continuous in the parallel assembly type shown in FIG. However, it is possible to attach the mixing valve main body 4a only to the left and right sides, respectively, by assembling them continuously by the joining portions a and b that are detachably joined. As a form including parts a and b,
Separately formed, these mixing valve bodies 4a ... Are fitted together first to be in a state of being assembled in multiples, and the above-mentioned connecting pipe portions 4b.
By assembling each of the 4c, the multiple type electric mixing valve A as shown in FIG. 3 is assembled.

In this case, as shown in FIG. 4, the joint portions a and b are formed by fitting the male joint portion a formed in the axial cylinder shape and the female joint portion b in the sheath cylinder shape. In the form, the mixing valve main body 4a located on the right end side in FIG. 4 has a shape having male joint portions b and b on both left and right sides, and is located in the center in FIG. Like the mixing valve body 4a and the mixing valve body 4a located on the left end side, a male joint b is provided on one of the left and right sides and a female joint a is provided on the other side. It's formed in two ways.

However, in any of the configurations shown in FIGS. 6 and 10, the internal structure of the mixing valve body 4a is made the same. Next, the internal structure will be described.

Inside the mixing valve body 4a, there is provided a low temperature water passage 40 communicating with a joint pipe portion 4c having a low temperature water inlet C on the upper side, and a joint pipe portion having a high temperature water inlet H on the lower side. A high temperature water passage 41 communicating with 4b is provided. The low temperature water passage 40 and the high temperature water passage 41 are provided in the mixing valve body 4
a, as shown in FIG.
In the case where it is formed as a separate body from c and joined in multiples to be assembled, the both ends of the low temperature water passage 40 and the high temperature water passage 41 are connected to the mixing valve body 4a. When the mixing valve bodies 4a ... Are joined in multiples, the joining portions a ... b are arranged in parallel when the joining valve bodies 4a. The low-temperature water passage 40 and the high-temperature water passage 41 in the mixing valve body 4a communicate with each other as a single low-temperature water passage 40 and a high-temperature water passage 41, respectively.

Therefore, inside the mixing valve body 4a, at the central portion between the low temperature water passage 40 and the high temperature water passage 41,
The valve chamber 42 is formed. The valve chamber 42 has a communication port 42 on the upper end side.
The first valve seat w is formed at the edge of the communication port 420 on the valve chamber 42 side by communicating with the low temperature water passage 40 through 0. Further, the lower end side of the valve chamber 42 communicates with the high temperature water passage 41 via the communication port 421, and a third valve seat z is formed at the edge of the communication port 421 on the valve chamber 42 side. Further, a second valve seat y facing the third valve seat z is formed in the lower part of the valve chamber 42 above the third valve seat z, and the second valve seat y and the above-mentioned first valve seat y are formed. A communication port 430 of the mixed water passage 43 communicating with the mixed water outlet M is opened in the middle of the one valve seat w. Here, regarding the first valve seat w, the second valve seat y, and the third valve seat z provided in the valve chamber 42, the third valve seat z is omitted and only the first valve seat w and the second valve seat y are provided. There is a case.

In the valve chamber 42, a first valve body 44 is arranged to face the above-mentioned first valve seat w so as to be movable back and forth from below.
And a second valve body 45 in which the lower surface side and the upper surface side alternately advance and retreat with respect to the above-mentioned second valve seat y and third valve seat z, and in the direction in which they are separated from each other. A biasing spring 46 is interposed (FIG. 5). In this case, as mentioned above,
When the third valve seat z is omitted, the second valve body 45
May be such that the upper surface side thereof faces the second valve seat y.

A valve shaft 47 slidably penetrates through the respective axial core portions of the first valve body 44 and the second valve body 45, and the valve shaft 47 is watertight at its upper end side and is mixed valve body 4a. Is connected to the output shaft of the drive unit 4d mounted on the assembly seat on the upper surface of the mixing valve body 4a, and is vertically moved by the control of the operation of the drive unit 4d. And, it penetrates through the shaft center portion of the second valve body 45 and slides.

An abutting member 48, which is a snap ring, abuts against the lower surface of the second valve body 45, is fixed to the lower end of the valve shaft 47, and is attached to the upper end thereof. The upper surface side of the second valve body 45 abuts on the second valve seat y by the abutting member 48, and the first valve body 44 is pushed up by the spring 46 whose lower end side is supported by the second valve body 45. In the state of abutting against the first valve seat w, a portion including a retaining ring that abuts against the upper surface of the first valve body 44 at a portion located slightly above the first valve body 44. The joining member 49 is fixed.

When the male screw 50 rotates in the forward or reverse direction due to the operation of the transmission mechanism that transmits power to the output shaft of the motor m, the driving portion 4d is fitted in the guide 51 on the outer peripheral side and its rotation is restricted so that the inner peripheral surface is prevented. Female screw 5 whose side is screwed onto the male screw 50
2 moves up and down, and the valve shaft 47 that abuts and connects to the lower surface of the female screw 52 is operated up and down in cooperation with a return spring 54 that connects the valve shaft 47 to the valve shaft 47 via a connecting member 53. It is a normal one that will let you. At this time, as shown in FIG. 9, a thermistor S is provided in the mixed water passage 43 communicating with the valve chamber 42 or the mixed water outlet M or in the middle of the pipe of the mixed water, and the temperature signal detected by the thermistor S drives the motor m. 4d may be automatically controlled. When the electrically-operated mixing valve A is used for heating, the thermistor S described above may be provided so as to detect the room temperature, and thereby the drive unit 4d may be controlled according to the room temperature.

Reference numeral 6 is a joint pipe portion 4b having a high temperature water inlet H.
A manual handle mounted on the upper surface side of the joint pipe part 4b so that a maintenance cock (not shown) assembled inside can be manually operated, and 7 is a joint pipe having a low temperature water inlet C. It is a manual handle attached to the lower surface side of the connection pipe portion 4c so that a maintenance cock (not shown) attached to the portion 4c can be manually operated.

The embodiment apparatus configured as described above operates as follows. As shown in FIG. 3, the electric mixing valve A is
In the state of being connected to the circulation circuit 2 of the heat source device 1, the valve shaft 47 is pulled up by the control operation of the driving unit 4d, and the upper surface side of the second valve body 45 abuts against the second valve seat y. Two
The first valve body 4 is pressed by the biasing force of the spring 46 supported by the valve body 45.
When 4 is in abutment with the first valve seat w, the high temperature water passage 41 and the low temperature water passage 40 are blocked from the mixed water passage 43. Therefore, there is no discharge of hot water from the mixed water outlet M, and the water is in a stopped state.

Next, the valve shaft 47 is activated by the control operation of the drive unit 4d.
The abutment member 49 provided on the upper side of the first valve body 44
The lower end of the valve shaft 47 is lowered by lowering the upper surface of the valve shaft 47 within a range in which it is not pressed. Then, since the first valve body 44 abuts against the first valve seat w and does not move upward, the second valve body 45 is abutted by the biasing of the spring 46 supported by the first valve body 44. It moves downward until it abuts against the mating member 48 and the lowering operation is blocked, the valve between the second valve body 45 and the second valve seat y opens, and the high temperature water in the high temperature water passage 41 moves to the first position. It flows into the mixed water passage 43 through the lower surface side of the second valve body 45 and the third valve seat z, and between the upper surface side of the second valve body 45 and the second valve seat y. Therefore, only the high temperature water is discharged from the mixed water outlet M and circulates in the circulation circuit 2.

Next, the valve shaft 47 is slightly lowered from the state position shown in FIG. 7 by the control operation of the drive section 4d. Then, the first valve body 44 is pushed downward by the abutment member 49, so that the space between the first valve body 44 and the first valve seat w is opened as shown in FIG. The low-temperature water in the low-temperature water passage 40 flows into the inside, and the high-temperature water flowing in from the high-temperature water passage 41 is mixed with the inside of the valve chamber 42 as a mixing chamber and flows out to the mixed-water passage 43. Become. In this state, if the downward movement amount of the valve shaft 47 is adjusted and the opening degree between the upper surface of the first valve body 44 and the first valve seat w is changed, the inflow amount of the low temperature water changes, At the same time, the opening degree between the upper surface of the first valve body 44 and the first valve seat w is increased so that the opening degree between the lower surface side of the second valve body 45 and the third valve seat z is narrowed. Since the two-valve element 45 is moved, the temperature of the mixed water can be selected and adjusted quickly.

Next, when the valve shaft 47 is further lowered from the above state, the lower surface of the second valve body 45 abuts against the third valve seat z, as shown in FIG. 42 and hot water passage 4
1 is cut off by the lower surface of the second valve body 45 and the third valve seat z. In this state, only the low temperature water from the low temperature water passage 40 flows into the valve chamber 42 into the mixed water passage 43, and only the low temperature water circulates from the mixed water outlet M to the circulation circuit 2 through the mixed water passage 43. become. Therefore, when the heating is too effective, the corresponding state is achieved.

[0026]

As described above, the electrically operated mixing valve A according to the present invention has a water stop state in which the discharge of the mixed water from the mixed water outlet M is stopped by the control operation of one drive section 4d.
Since the operation for changing and adjusting the temperature of the mixed water taken out from the mixed water outlet M as desired and the operation for switching between the state where only the high temperature water is taken out and the state where only the low temperature water is taken out from the mixed water outlet M can be obtained. Without using the bypass pipe line 23 and the bypass valve SV2, high-temperature hot water that avoids mixing with water can be supplied to the heat exchanger 3 or the hot water tap, and the mixing valve MV itself has a function of a stop valve. Thus, in a state where the stop valve SV1 which is an electromagnetic valve is omitted, it is possible to mix and stop the hot water and water at a desired ratio by one driving body. Further, when the valve chamber 42 is provided with the third valve seat z that abuts against the lower surface side of the second valve body 45, only the low temperature water can be circulated in the circulation circuit 2, and when the heating is too effective. It is the key to being able to respond. In addition, by combining a thermistor that detects the temperature of mixed water or room temperature, the temperature of the mixed water to be taken out can be automatically adjusted to an arbitrary constant temperature, and the circulation of water, water, and mixed water can be stopped automatically depending on the room temperature. Will be able to do.

[Brief description of drawings]

FIG. 1 is an explanatory view of conventional means for mixing hot water and water boiled by a heat source device and guiding the mixture to a hot water tap.

FIG. 2 is an explanatory diagram of conventional means for mixing hot water and water boiled by a heat source device and circulating the mixture for heat exchange for heating.

FIG. 3 is a development view of a circulation circuit for heating using the electric mixing valve according to the present invention.

FIG. 4 is a partially cutaway front view of the electric mixing valve according to the present invention.

FIG. 5 is a side view in which the electrically operated mixing valve is partially broken.

FIG. 6 is a partially cutaway front view of a single type of the above electric mixing valve.

FIG. 7 is an explanatory diagram showing a state in which only high temperature water is taken out from the mixed water outlet of the electric mixing valve of the above.

FIG. 8 is an explanatory diagram showing a state in which mixed water is taken out from the mixed water outlet of the above electric mixing valve.

FIG. 9 is an explanatory diagram showing a state in which only low-temperature water is taken out from the mixed water outlet of the above electric mixing valve.

FIG. 10 is a partially cutaway side view of a unitary electric mixing valve.

[Explanation of symbols]

A ... Electric mixing valve, C ... Low temperature water inlet, H ... High temperature water inlet, M
... Mixed water outlet, P ... Circulation pump, MV ... Mixing valve, SV1 / SV2 ... Stop valve, a / b ... Joint, w
... 1st valve seat, y ... 2nd valve seat, z ... 3rd valve seat, m ... Motor, 1 ... Heat source machine, 10 ... Hot water supply port, 11 ... Return port, 2 ... Circulation pipeline, 20 ... Hot water supply pipe, 21/22 ... Piping, 23 ... Bypass pipeline, 24 ... Piping, 25 ... Branch pipe, 3 ... Heat exchanger, 4a ... Mixing valve body, 4b.4c ... Joint pipe section, 4d ...
Drive unit, 40 ... Low temperature water passage, 41 ... High temperature water passage, 42 ...
Valve chamber, 420/421 ... communication port, 43 ... mixed water passage, 4
30 ... Communication port, 44 ... First valve body, 45 ... Second valve body, 46
... Spring, 47 ... Valve shaft, 48/49 ... Abutting member, 50 ... Male screw, 51 ... Guide, 52 ... Female screw, 53 ... Connecting member,
54 ... Return spring, 6/7 ... Manual handle.

Claims (6)

[Claims] 1. Inside the mixing valve body, a low temperature water passage communicating with a joint pipe section having a low temperature water inlet is provided on the upper side, and high temperature water communicating with a joint pipe section having a high temperature water inlet is provided on the lower side. A passage is provided, and an intermediate portion is provided with a valve chamber in which the upper end side communicates with the low temperature water passage through the communication port, and the lower end side communicates with the high temperature water passage through the communication port. The first valve seat, which is provided on the side closer to the communication port, has an upper surface facing the first valve seat.
A valve body and a second valve body whose upper surface side faces a second valve seat provided on the side closer to the communication port with the high temperature water passage in the valve chamber, and are assembled on the upper surface side of the mixing valve body. A valve shaft that is moved up and down by a driving unit is slidably penetrated through the shaft core portions of the first valve body and the second valve body, and the lower surface of the valve shaft is provided with the lower surface of the second valve body. An abutting member that abuts on the side, and an abutting member that abuts on the upper surface side of the first valve body on the upper end side.
A spring for urging the first valve body and the second valve body in a direction for separating them is provided, and the valve chamber communicates with the mixed water outlet between the first valve body and the second valve body. An electric mixing valve that opens a communication port of the mixing water passage. 2. The third valve seat facing the lower surface side of the second valve body is provided between the second valve seat in the valve chamber and the communication port of the high temperature water passage. Electric mixing valve. 3. The electric mixing valve according to claim 1, wherein a thermistor for detecting the temperature of the mixed water is installed near the mixed water outlet, and the drive unit is controlled by the temperature signal detected by the thermistor. 4. A mixing valve main body, a joint pipe section having a low temperature water inlet, and a joint pipe section having a high temperature water inlet are separately formed, and the joint pipe section and a joint section formed in them. 2. The electric mixing valve according to claim 1, wherein the mixing valve body is assembled on the left and right sides of the mixing valve body so as to be separable from and to the left and right sides of the mixing valve body. 5. A mixing valve body, a joint pipe section having a low temperature water inlet, and a joint pipe section having a high temperature water inlet are separately formed, and the mixing valve body has joints on both left and right sides thereof. Providing joints to join with the joints provided on the pipe on both left and right sides,
The electric mixing valve according to claim 1, wherein both ends of a low temperature water passage and a high temperature water passage formed in the mixing valve body are opened to the joint. 6. The electric motor according to claim 4, wherein the joints provided on both the left and right side portions of the mixing valve body are connected to the joints provided on the left and right side portions of another mixing valve body so that they can be connected to and detached from each other. Mixing valve.