JP7000183B2 - Thermo valve for mixing hot and cold water - Google Patents

Description

The present invention relates to a hot water mixing thermovalve that mixes hot water and water and discharges hot water at a predetermined set temperature.

Conventionally, as is known in Patent Document 1, this type of thermovalve for mixing hot and cold water flows into a first inflow port of a peripheral wall portion through which hot water flows, and an axially separated first inflow port from the first inflow port. A tubular valve casing having a second inflow port on the peripheral wall, an internal mixing chamber separated axially from the first inflow port, and a discharge port communicating with the mixing chamber, and a first inflow in the valve casing. To the tubular valve seat member provided in the portion between the port and the second inflow port, and the tubular first guide provided in the portion between the first inflow port and the mixing chamber in the valve casing. It is slidably inserted and supported in the axial direction, and faces the first valve seat surface, which is the end surface of the valve seat member on the first inflow port side, and the communication opening degree of the first inflow port with respect to the inner peripheral space of the valve seat member. The second valve seat member is slidably inserted and supported by a first valve body that is variable in size and a tubular second guide provided in a portion adjacent to one of the axial directions of the second inflow port in the valve housing. It is provided with a second valve body that faces the second valve seat surface, which is the end surface on the inflow port side, and changes the communication opening degree of the second inflow port with respect to the inner peripheral space of the valve seat member. The first valve body has a cylindrical shape, and the inner peripheral space of the valve seat member communicates with the mixing chamber via the inner peripheral space of the first valve body, and the second valve body is the first valve. It is separate from the body.

The thermo valve further includes a temperature-sensitive member that strongly urges the first valve body to one axial direction as the water temperature in the mixing chamber rises, a bias spring that urges the second valve body to the other axial direction, and a valve seat member. It is inserted into the inner peripheral space of the valve body and has an intermediate shaft for transmitting the urging force of the temperature sensitive member and the urging force of the bias spring between the first valve body and the second valve body. When the water temperature in the mixing chamber becomes higher than the set temperature determined by the urging force of the bias spring, the urging force of the temperature sensitive member becomes greater than the urging force of the bias spring, and the first valve body and the second valve body are axially one side. When the communication opening of the first inflow port to the inner peripheral space of the valve seat member decreases and the communication opening of the second inflow port increases, and the water temperature of the mixing chamber becomes lower than the set temperature, it feels like. When the urging force of the warming member becomes less than the urging force of the bias spring, the first valve body and the second valve body are displaced to the other in the axial direction, and the communication opening of the first inflow port with respect to the inner peripheral space of the valve seat member becomes. As the temperature increases, the communication opening of the second inflow port decreases, and the mixing ratio of hot water and water is automatically adjusted so that the water temperature in the mixing chamber reaches the set temperature.
It is also possible to allow water to flow into the first inflow port and hot water to flow into the second inflow port. In this case, the higher the water temperature in the mixing chamber, the weaker the urging force of the temperature sensitive member.

Here, conventionally, the intermediate shaft is fixed to one of the first and second valve bodies, and the outside of the intermediate shaft is larger than the inner diameter of the valve seat member so that water flows into the inner peripheral space of the valve seat member. The diameter is reduced. Therefore, the first and second valve bodies are slidably supported in the axial direction in a cantilever state only by the first and second guides. As a result, each valve body can be tilted by the sliding clearance between each guide. Then, the communication opening degree of each inflow port with respect to the inner peripheral space of the valve seat member changes due to the tilt of each valve body, which may cause an adjustment error of the water temperature in the mixing chamber.

Japanese Unexamined Patent Publication No. 11-218242

In view of the above points, the present invention provides a thermo-valve for mixing hot and cold water, which prevents tilting of each of the first and second valves and prevents an error in adjusting the water temperature of the mixing chamber due to this tilting. The challenge is to provide it.

In order to solve the above problems, the present invention presents a first inflow port of a peripheral wall portion into which one of hot water and water flows in, and a peripheral wall in which the other of hot water and water flows in, which is separated from the first inflow port in one axial direction. A cylindrical valve housing having a second inflow port of the unit, an internal mixing chamber separated axially from the first inflow port, and a discharge port communicating with the mixing chamber, and a first inflow port in the valve housing. Axial to the tubular valve seat member provided between the and the second inflow port and the tubular first guide provided in the portion between the first inflow port and the mixing chamber in the valve casing. It is slidably inserted and supported, and faces the first valve seat surface, which is the end surface of the valve seat member on the first inflow port side, and changes the communication opening degree of the first inflow port with respect to the inner peripheral space of the valve seat member. , A cylindrical first valve body having an inner peripheral space that communicates the inner peripheral space of the valve seat member with the mixing chamber, and a tubular shape provided in a portion adjacent to one of the axial directions of the second inflow port in the valve casing. The second inflow port is slidably inserted and supported by the second guide of the valve seat member, and faces the second valve seat surface, which is the end surface of the valve seat member on the second inflow port side, and the second inflow port communicates with the inner peripheral space of the valve seat member. A second valve body that is separate from the first valve body and has a variable opening, and a temperature-sensitive member that urges the first valve body in one axial direction with a urging force that changes according to the water temperature of the mixing chamber. A bias spring that urges the second valve body to the other in the axial direction, and a bias spring that is inserted into the inner peripheral space of the valve seat member, and the urging force of the temperature sensitive member and the bias spring between the first valve body and the second valve body. A thermo-valve for mixing hot and cold water equipped with an intermediate shaft that transmits urging force. When hot water flows into the first inflow port, the higher the water temperature in the mixing chamber, the stronger the urging force of the temperature sensitive member. 1 When water flows into the inflow port, the urging force of the temperature sensitive member becomes weaker as the water temperature in the mixing chamber becomes higher, and the intermediate shaft is the first half part fixed to the first valve body and the first half. It is divided into a second half portion fixed to the second valve body that abuts on the portion from one axial direction, and each of the first and second half portions is slidably inserted and supported by the valve seat member in the axial direction. It is characterized by having a support portion.

According to the present invention, the first and second valve bodies are not only slidably supported in the axial direction by the first and second guides, but are also supported by the first and second intermediate shafts, respectively. It is slidably supported in the axial direction by the valve seat member in the half support portion. Therefore, each valve body is in a support state at both ends, and tilting of each valve body can be prevented. As a result, it is possible to prevent an error in adjusting the water temperature in the mixing chamber due to the tilt of each valve body.

The cut side view of the thermo valve for hot water mixing of 1st Embodiment of this invention. The perspective view of the disassembled state of the main part of the thermo valve for hot water mixing of 1st Embodiment. The cut side view of the thermo valve for hot water mixing of 2nd Embodiment.

With reference to FIG. 1, the hot water mixing thermovalve according to the embodiment of the present invention includes a cylindrical valve housing 1. The valve housing 1 has a peripheral wall portion where water flows in, which is separated from the first inflow port 11 of the peripheral wall portion into which hot water from a hot water storage tank or the like flows in and one axial direction (upper in FIG. 1) from the first inflow port 11. The second inflow port 12 of the above, the internal mixing chamber 13 separated from the first inflow port 11 in the other axial direction (lower in FIG. 1), and the discharge port 14 at the other end in the axial direction communicating with the mixing chamber 13. have. In the valve housing 1, a cylindrical valve seat member 15 located between the first inflow port 11 and the second inflow port 12, and a portion between the first inflow port 11 and the mixing chamber 13 A cylindrical first guide 16 is provided, and a cylindrical second guide 17 is provided at a portion adjacent to one of the axial directions of the second inflow port 12.

Further, the thermo valve is slidably inserted and supported in the first guide 16 in the axial direction, and faces the first valve seat surface 151, which is the end surface of the valve seat member 15 on the first inflow port 11 side, and is opposed to the valve seat. The second inflow of the valve seat member 15 is supported by being slidably inserted and supported in the axial direction by the first valve body 2 that changes the communication opening degree of the first inflow port 11 with respect to the inner peripheral space of the member 15 and the second guide 17. It is separate from the first valve body 2 that changes the communication opening degree of the second inflow port 12 with respect to the inner peripheral space of the valve seat member 15 facing the second valve seat surface 152 which is the end surface on the port 12 side. It is provided with a second valve body 3. The first valve body 2 has a cylindrical shape, and the inner peripheral space of the valve seat member 15 communicates with the mixing chamber 13 via the inner peripheral space of the first valve body 2. Then, the hot water that flows from the first inflow port 11 into the mixing chamber 13 through the inner peripheral space of the valve seat member 15 and the hot water that flows from the second inflow port 12 into the mixing chamber 13 through the inner peripheral space of the valve seat member 15. The water to be mixed is mixed in the mixing chamber 13 to become hot water, and this hot water is discharged from the discharge port 14.

The thermovalve is further arranged in the mixing chamber 13, and a temperature-sensitive spring 4 made of a shape memory alloy, which is a temperature-sensitive member that strongly urges the first valve body 2 in one axial direction as the water temperature in the mixing chamber 13 increases. A bias spring 5 that urges the second valve body 3 to the other in the axial direction and a temperature-sensitive spring 4 that is inserted into the inner peripheral space of the valve seat member 15 and between the first valve body 2 and the second valve body 3. It is provided with an intermediate shaft 6 that transmits the urging force and the urging force of the bias spring 5.

According to the above configuration, when the water temperature of the mixing chamber 13 becomes higher than the set temperature determined by the urging force of the bias spring 5, the urging force of the temperature sensitive spring 4 becomes equal to or higher than the urging force of the bias spring 5, and the first The valve body 2 and the second valve body 3 are displaced in one axial direction, the communication opening of the first inflow port 11 to the inner peripheral space of the valve seat member 15 decreases, and the communication opening of the second inflow port 12 increases. Further, when the water temperature in the mixing chamber 13 becomes lower than the set temperature, the urging force of the temperature sensitive spring 4 becomes equal to or less than the urging force of the bias spring 5, and the first valve body 2 and the second valve body 3 are axially oriented. Displaced to the other side, the communication opening of the first inflow port 11 to the inner peripheral space of the valve seat member 15 increases, the communication opening of the second inflow port 12 decreases, and the water temperature of the mixing chamber 13 becomes the set temperature. The mixing ratio of hot water and water is automatically adjusted.

The spring receiver 51 of the bias spring 5 is in contact with a rod 53 inserted into a guide sleeve 52 mounted on one end of the valve housing 1 in the axial direction, and the rod 53 is subjected to a feed screw mechanism by a motor 54. It is possible to move in the axial direction via. Therefore, by driving the motor 54, the urging force of the bias spring 5, that is, the set temperature can be changed. Further, as shown in FIG. 2, the valve seat member 15, the first guide 16 and the second guide 17 are connected to each other by two pieces 18 in the circumferential direction extending in the axial direction to form an integral part. There is.

Here, in the present embodiment, the intermediate shaft 6 abuts on the first half portion 61 fixed to the first valve body 2 and the first half portion 61 from one axial direction, and is fixed to the second valve body 3. It is divided into two halves 62. As shown in FIG. 2, the first and second half portions 61 and 62 are end faces of the first and second valve bodies 2 and 3 facing the first and second valve seat surfaces 151 and 152. It has two projecting pieces 61a, 62a protruding in the axial direction from the surface, and ring portions 61b, 62b at the tips of the projecting pieces 61a, 62a. The ring portion 62b of the second half portion 62 abuts from one of the axial directions. Further, the ring portions 61b and 62b of the first and second half portions 61 and 62 are in sliding contact with the inner peripheral surface of the valve seat member 15. That is, the ring portions 61b and 62b are support portions that are slidably inserted and supported in the valve seat member 15 in the axial direction.

According to this, the first and second valve bodies 2 and 3 are not only slidably supported in the axial direction by the first and second guides 16 and 17, but also the first and second valves. The ring portions 61b and 62b of each of the half portions 61 and 62 are slidably supported in the axial direction by the valve seat member 15. Therefore, the valve bodies 2 and 3 are in a support state at both ends, and the tilting of the valve bodies 2 and 3 can be prevented. As a result, it is possible to prevent an error in adjusting the water temperature of the mixing chamber 13 due to the tilt of each of the valve bodies 2 and 3.

Next, the second embodiment shown in FIG. 3 will be described. The basic structure of the second embodiment is not different from that of the first embodiment, and the same members and parts as those of the first embodiment are designated by the same reference numerals as above. The difference between the second embodiment and the first embodiment is that the packings 21 and 31 that can be seated on the first and second valve bodies 2 and 3 and on the first and second valve seat surfaces 151 and 152. Is installed. According to this, when the set temperature is equal to the temperature of the water flowing in from the second inflow port 12, the packing 21 of the first valve body 2 is seated on the first valve seat surface 151 and mixed from the first inflow port 11. When the inflow of hot water into the chamber 13 is completely prevented or the set temperature is equal to the temperature of the hot water flowing in from the first inflow port 11, the packing 31 of the second valve body 3 is seated on the second valve seat surface 152. Therefore, the inflow of water from the second inflow port 12 to the mixing chamber 13 can be completely prevented.

Although the embodiments of the present invention have been described above with reference to the drawings, the present invention is not limited thereto. For example, instead of the temperature-sensitive spring 4 of the above-described embodiment, a wax element containing a thermally expanding wax may be used as the temperature-sensitive member. Further, in the above embodiment, hot water is flowed into the first inflow port 11 and water is flowed into the second inflow port 12, but it is also possible to flow water into the first inflow port 11 and hot water into the second inflow port 12. Is. In this case, as the temperature-sensitive member, a temperature-sensitive spring made of a shape memory alloy whose urging force becomes weaker as the water temperature of the mixing chamber 13 becomes higher is used.

1 ... valve housing, 11 ... first inflow port, 12 ... second inflow port, 13 ... mixing chamber, 15 ... valve seat member, 151 ... first valve seat surface, 152 ... second valve seat surface, 16 ... first Guide, 17 ... 2nd guide, 2 ... 1st valve body, 3 ... 2nd valve body, 4 ... temperature sensitive spring (temperature sensitive member), 5 ... bias spring, 6 ... intermediate shaft, 61 ... 1st half, 61b ... Ring portion (support portion), 62 ... Second half portion, 62b ... Ring portion (support portion).

Claims (1)

The first inflow port of the peripheral wall where one of hot water and water flows in, the second inflow port of the peripheral wall where the other of hot water and water flows in, and the first inflow port, which are separated from the first inflow port in one axial direction. A cylindrical valve housing having an internal mixing chamber separated from the other in the axial direction and a discharge port communicating with the mixing chamber, and provided between the first inflow port and the second inflow port in the valve housing. A cylindrical valve seat member and a cylindrical first guide provided in a portion between the first inflow port and the mixing chamber in the valve housing are slidably inserted and supported in the axial direction to support the valve seat member. The inner peripheral space of the valve seat member, which is opposed to the first valve seat surface, which is the end surface on the first inflow port side, and which changes the communication opening degree of the first inflow port with respect to the inner peripheral space of the valve seat member, is used as a mixing chamber. It is slidably inserted and supported by a cylindrical first valve body having a communication inner peripheral space and a tubular second guide provided in a portion adjacent to one of the axial directions of the second inflow port in the valve housing. What is the first valve body that changes the communication opening degree of the second inflow port with respect to the inner peripheral space of the valve seat member facing the second valve seat surface which is the end surface of the valve seat member on the second inflow port side? A separate second valve body, a temperature-sensitive member that urges the first valve body to one axial direction with an urging force that changes according to the water temperature of the mixing chamber, and a second valve body to urge the other axial direction. Hot water provided with a bias spring and an intermediate shaft inserted into the inner peripheral space of the valve seat member and transmitting the urging force of the temperature sensitive member and the urging force of the bias spring between the first valve body and the second valve body. In a mixing thermo valve, when hot water flows into the first inflow port, the higher the water temperature in the mixing chamber, the stronger the urging force of the temperature sensitive member, and when water flows into the first inflow port, mixing In the case where the urging force of the temperature sensitive member becomes weaker as the water temperature in the room becomes higher,
The intermediate shaft is divided into a first half portion fixed to the first valve body and a second half portion fixed to the second valve body, which abuts on the first half portion from one axial direction. Each half of the thermo-valve for hot and cold water mixing is characterized by having a support portion that is slidably inserted and supported in the valve seat member in the axial direction.

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