TWM647659U - Mixing valve structure - Google Patents

Abstract

A mixing valve structure includes a body and a differential pressure valve. The body has an air chamber, a venturi channel, a mixed gas chamber, a gas chamber, a first valve hole and a receiving chamber. The air chamber is connected to the mixture chamber through a venturi channel. The differential pressure valve is located in the accommodation chamber and separates the accommodation chamber into a first accommodation sub-chamber and a second accommodation sub-chamber. The gas chamber corresponds to the mixed gas chamber. The Venturi channel includes two connected wide-diameter sections and a narrow-diameter section. The two wide diameter sections connect the air chamber and the mixture chamber. The body has a positive pressure channel. The positive pressure channel connects the wide diameter section and the first accommodation sub-chamber. When the air flow flows through the venturi channel, positive pressure is generated in the first accommodation sub-chamber through the positive pressure channel, causing the pressure difference valve to open the first valve hole to connect the gas chamber and the mixed gas chamber. .

Description

Mixing valve structure

The new invention relates to a mixing valve structure, in particular to a mixing valve structure that controls the opening and closing of the valve hole through positive pressure and negative pressure.

Devices such as water heaters can be equipped with a mixing valve structure to premix gas and air, and then deliver the mixed gas of gas and air to the burner.

Generally speaking, the mixing valve structure uses a fan to generate air flow and generates negative pressure in the channel within the mixing valve structure to open or close the valve hole to adjust the gas flow. However, the efficiency of the current mixing valve structure in regulating gas flow is still insufficient, and it is difficult to meet the user's demand for hot water. Therefore, how to improve the efficiency of the mixing valve structure in regulating gas flow is one of the problems that researchers should solve.

The present invention provides a mixing valve structure, thereby improving the efficiency of the mixing valve structure in regulating gas flow.

The mixing valve structure disclosed in one embodiment of the present invention includes a body and a pressure difference valve. The body has an air chamber, a venturi channel, a mixed gas chamber, a gas chamber, a first valve hole and a receiving chamber. The air chamber is connected to the mixture chamber through a venturi channel. The differential pressure valve is movably located in the accommodation chamber and separates the accommodation chamber into a first accommodation sub-chamber and a second accommodation sub-chamber. The gas chamber corresponds to the mixed gas chamber through the first valve hole and the second accommodation sub-chamber of the accommodation chamber. Among them, the Venturi channel includes two connected wide-diameter sections and one narrow-diameter section. The two wide-diameter sections are connected to the air chamber and the mixture chamber respectively, and the narrow-diameter section is connected to the two wide-diameter sections. The body also has a positive pressure channel. Opposite ends of the positive pressure channel are respectively connected to the wide diameter section of the venturi channel and the first accommodation sub-chamber. When an air flow flows through the venturi channel, a positive pressure is generated in the first accommodation sub-chamber through the positive pressure channel, causing the pressure difference valve to open the first valve hole to allow the gas chamber to pass through the second accommodation sub-chamber. The sub-chamber is connected with the mixture chamber.

According to the mixing valve structure of the above embodiment, since the air flow generated by the fan flows through the venturi channel and generates positive pressure in the first accommodation sub-chamber through the positive pressure channel, the pressure difference valve can be driven to open or The first valve hole is closed to efficiently adjust the gas flow to meet the user's demand for hot water.

The above description of the content of the present invention and the following description of the embodiments are used to demonstrate and explain the principles of the present invention, and to provide a further explanation of the patent application scope of the present invention.

See Figure 1. Figure 1 is a schematic cross-sectional view of a mixing valve structure according to an embodiment of the present invention. The mixing valve structure 10 of this embodiment is used in a water heater, for example, and includes a body 20 and a differential pressure valve 30 . The body 20 has an air chamber 201, a fan 202, a venturi channel 203, a mixed gas chamber 204, a receiving chamber 205, a first valve hole 206, a positive pressure channel 207, and a gas chamber. chamber 208, a gas channel 209 and a through hole 210. The air chamber 201 has an air inlet 2011, and the fan 202 is disposed at the air inlet 2011. The fan 202 is used to generate air flow and flow into the air chamber 201 from the air inlet 2011. The air chamber 201 is connected to the mixture chamber 204 away from the air inlet 2011 through a venturi passage 203 . The so-called venturi tube refers to a pipe body in which the diameters of the opposite ends are larger than the diameter of the middle part. The venturi channel 203 includes two connected wide diameter sections 2031 and a narrow diameter section 2032 . The two wide-diameter sections 2031 are respectively connected to the air chamber 201 and the mixture chamber 204, and the narrow-diameter section 2032 connects the two wide-diameter sections 2031.

The pressure differential valve 30 is movably located in the accommodation chamber 205 and includes a flexible membrane 301, a valve stem 302 and a valve plug 303. The flexible film 301 is disposed on the body 20 and separates the accommodation chamber 205 into a first accommodation sub-cavity 2051 and a second accommodation sub-cavity 2052. The opposite ends of the positive pressure channel 207 are respectively connected to the wide diameter section 2031 of the venturi channel 203 and the first accommodation sub-chamber 2051. The second accommodation sub-chamber 2052 is connected to the gas chamber 208 through the first valve hole 206, and the valve plug 303 is connected to the flexible film 301 through the valve stem 302, and is used to open or close the first valve hole 206 to adjust gas flow.

The gas chamber 208 corresponds to the mixed gas chamber 204 through the first valve hole 206 and the second accommodation sub-chamber 2052 of the accommodation chamber 205 . In detail, one end of the gas channel 209 is connected with the second accommodation sub-chamber 2052. The through hole 210 is located in the narrow diameter section 2032, and the other end of the gas channel 209 is connected to the narrow diameter section 2032 through the through hole 210. That is to say, the gas chamber 208 communicates with the mixed gas chamber 204 through the second accommodation sub-chamber 2052 and the gas passage 209 . The air generated by the fan 202 and the gas in the gas chamber 208 are mixed in the mixed gas chamber 204, and the mixed gas chamber 204 has a mixed gas outlet 2041. The mixed gas outlet 2041 is away from the air chamber 201 and the gas chamber 208 . The mixed gas outlet 2041 is connected to the burner (not shown), for example, through a pipeline (not shown), and is used to output the mixed gas of air and gas to the burner.

When the air flow generated by the fan 202 flows from the air chamber 201 through the wide diameter section 2031 of the venturi channel 203 connected to the air chamber 201, a pressure is generated in the first accommodation sub-chamber 2051 through the positive pressure channel 207. Positive pressure. In addition, when the air flow generated by the fan 202 flows from the air chamber 201 through the narrow diameter section 2032 of the venturi channel 203, a negative pressure is generated in the second accommodation sub-chamber 2052 through the gas channel 209. Through the positive pressure in the first accommodation sub-chamber 2051 and the negative pressure in the second accommodation sub-chamber 2052, the pressure difference valve 30 can open the first valve hole 206, so that the gas chamber 208 can pass through the second The accommodation sub-chamber 2052 is connected with the mixture chamber 204 .

Compared with the general mixing valve structure that only uses negative pressure to open or close the first valve hole, which requires the fan to generate air flow with a larger wind speed, the present invention can generate positive pressure through the first accommodation sub-chamber 2051 and The second accommodation sub-chamber 2052 generates negative pressure, so the fan 202 only needs to generate air flow with a small wind speed to drive the pressure difference valve 30 to open or close the first valve hole 206. In addition to reducing power consumption, it can also Efficiently adjusting the gas flow can also increase the temperature adjustment range of the water heater to meet the user's needs for hot water.

In this embodiment, the mixing valve structure 10 may also include an adjusting screw 40 and an adjusting spring 50 . The adjusting screw 40 is provided on the body 20 . The adjustment spring 50 is sandwiched between the adjustment screw 40 and the flexible film 301, so that the elastic force of the adjustment spring 50 can adjust the relative position of the valve plug 303 of the pressure difference valve 30 and the first valve hole 206 through the flexible film 301, thereby The minimum opening of the first valve hole 206 is adjusted to further adjust the gas flow.

In detail, when the adjusting screw 40 is tightened, the compression degree of the adjusting spring 50 will increase. The pressure of the adjustment spring 50 against the flexible diaphragm 301 will increase, and drive the valve plug 303 to move toward the first valve hole 206 through the flexible diaphragm 301 to reduce the minimum opening of the first valve hole 206 . On the contrary, when the adjusting screw 40 is loosened, the compression degree of the adjusting spring 50 will be reduced. The pressure of the adjusting spring 50 against the flexible diaphragm 301 will be reduced, and the flexible diaphragm 301 will drive the valve plug 303 away from the first valve hole 206 to increase the minimum opening of the first valve hole 206 . In this way, the minimum opening of the first valve hole 206 can be adjusted through the adjusting screw 40 and the adjusting spring 50 to further adjust the gas flow.

In this embodiment, the mixing valve structure 10 may further include a return spring 60 . The return spring 60 is, for example, a compression spring, and is sandwiched between the flexible film 301 of the differential pressure valve 30 and the body 20 to drive the valve plug 303 of the differential pressure valve 30 to close the first valve hole 206 .

In this embodiment, the mixing valve structure 10 may also include a pressure stabilizing valve 70 and a second valve hole 80, and the gas chamber 208 may also have a first gas sub-chamber 2081 and a second gas chamber. Subchamber 2082. The pressure stabilizing valve 70 is, for example, a solenoid valve and is provided on the body 20 . The first gas sub-chamber 2081 has a gas inlet 20811 for gas to flow in, and is connected to the second gas sub-chamber 2082 through the second valve hole 80 . The second gas sub-chamber 2082 communicates with the second accommodation sub-chamber 2052 through the first valve hole 206. The pressure stabilizing valve 70 is used to open or close the second valve hole 80 so that the first gas sub-chamber 2081 and the second gas sub-chamber 2082 are connected or disconnected. In this way, the gas flow in the gas chamber 208 can be adjusted through the pressure stabilizing valve 70 and the second valve hole 80 .

In this embodiment, the mixing valve structure 10 may also include a throttle valve 90 . The throttle valve 90 is disposed on the body 20 and used to adjust the gas flow in the gas passage 209 .

See Figure 2 and Figure 3. FIG. 2 is a schematic cross-sectional view of the first valve hole of the mixing valve structure of FIG. 1 closed. Figure 3 is a schematic cross-sectional view of the first valve hole of the mixing valve structure of Figure 1 being opened.

When the water heater is operating, the fan 202 generates air flow and flows into the air chamber 201 from the air inlet 2011, and flows along the direction A through the wide diameter section 2031 and the narrow diameter section 2032 of the venturi channel 203 connected to the air chamber 201. It flows into the mixed gas chamber 204, and the air flow flows into the first accommodation sub-chamber 2051 along the direction B from the wide diameter section 2031 connected to the air chamber 201 through the positive pressure channel 207. In this way, positive pressure will be generated in the first accommodation sub-chamber 2051 along the direction C through the positive pressure channel 207, and negative pressure will be generated in the second accommodation sub-chamber 2052 along the direction D through the gas channel 209. Through the positive pressure in the first accommodation sub-chamber 2051 and the negative pressure in the second accommodation sub-chamber 2052, the pressure difference valve 30 can be driven to move in the direction E to open the first valve hole 206, so that the gas inlet 20811 The inflowing gas can pass through the first valve hole 206 along the direction F, and flow to the mixture chamber 204 along the directions G, H, and I to be burned by the burner and heat the water. At this time, the main body 20 and the flexible film 301 jointly press the return spring 60 in the direction J, so that the return spring 60 stores elastic force.

On the contrary, when the fan 202 stops generating air flow, the first accommodation sub-chamber 2051 will not generate positive pressure, and the second accommodation sub-chamber 2052 will not generate negative pressure. At this time, the return spring 60 is no longer squeezed by the body 20 and the flexible film 301, and releases the stored elastic force and resets in the reverse direction J, so as to drive the pressure difference valve 30 to move in the reverse direction E to close the first A valve hole 206 prevents gas from passing through the first valve hole 206 to stop the operation of the water heater.

According to the mixing valve structure of the above embodiment, since the air flow generated by the fan flows through the venturi channel and generates positive pressure in the first accommodation sub-chamber through the positive pressure channel, the pressure difference valve can be driven to open or The first valve hole is closed to efficiently adjust the gas flow to meet the user's demand for hot water.

In addition, the air flow generated by the fan can also pass through the gas channel to generate negative pressure in the second accommodation sub-chamber. In this way, through the positive pressure in the first accommodation sub-chamber and the negative pressure in the second accommodation sub-chamber, the fan only needs to generate air flow with a smaller wind speed to drive the pressure difference valve to open or close the second accommodation sub-chamber. In addition to reducing power consumption, a valve hole can further efficiently adjust the gas flow and increase the temperature adjustment range of the water heater to further meet the user's demand for hot water.

Although the present invention has been disclosed in the foregoing embodiments, they are not intended to limit the present invention. Anyone skilled in the art of modeling can make some modifications and modifications without departing from the spirit and scope of the present invention. Therefore, the present invention is The scope of patent protection for a new model shall be determined by the scope of the patent application attached to this specification.

10: Mixing valve structure 20:Ontology 201:Air chamber 2011: Air inlet 202:Fan 203: Venturi channel 2031:Wide diameter section 2032: Narrow diameter section 204:Mixture chamber 2041: Mixed gas outlet 205: Accommodation chamber 2051: First accommodation sub-chamber 2052: Second accommodation sub-chamber 206: First valve hole 207: Positive pressure channel 208:Gas chamber 2081: First gas sub-chamber 20811: Gas import 2082: Second gas sub-chamber 209:Gas channel 210:Through hole 30: Differential pressure valve 301: Flexible film 302:Valve stem 303: Valve plug 40:Adjustment screw 50:Adjust spring 60:Return spring 70: Pressure regulating valve 80: Second valve hole 90:Throttle valve A~J: direction

Figure 1 is a schematic cross-sectional view of a mixing valve structure according to an embodiment of the present invention. FIG. 2 is a schematic cross-sectional view of the first valve hole of the mixing valve structure of FIG. 1 closed. Figure 3 is a schematic cross-sectional view of the first valve hole of the mixing valve structure of Figure 1 being opened.

10: Mixing valve structure

20:Ontology

201:Air chamber

2011: Air inlet

202:Fan

203: Venturi channel

2031:Wide diameter section

2032: Narrow diameter section

204:Mixture chamber

2041: Mixed gas outlet

205: Accommodation chamber

2051: First accommodation sub-chamber

2052: Second accommodation sub-chamber

206: First valve hole

207: Positive pressure channel

208:Gas chamber

2081: First gas subchamber

20811: Gas import

2082: Second gas sub-chamber

209:Gas channel

210:Through hole

30: Differential pressure valve

301: Flexible film

302:Valve stem

303: Valve plug

40:Adjustment screw

50:Adjust spring

60:Return spring

70: Pressure regulating valve

80: Second valve hole

90:Throttle valve

Claims (10)

A mixing valve structure containing: A body has an air chamber, a venturi channel, a mixed gas chamber, a gas chamber, a first valve hole and a receiving chamber. The air chamber is connected to the venturi channel through the venturi channel. the mixed gas chamber; and a pressure differential valve, which is movably located in the accommodation chamber and separates the accommodation chamber into a first accommodation sub-chamber and a second accommodation sub-chamber. The gas chamber passes through the first valve hole and the second accommodation sub-chamber of the accommodation chamber corresponds to the mixed gas chamber; wherein the venturi channel includes two connected wide diameter sections and a narrow diameter section, the two wide diameter sections are connected to the air chamber and the mixed gas chamber respectively, and the narrow diameter section connects the two wide diameter sections, the body further has a positive pressure channel, and the two opposite sides of the positive pressure channel The ends are respectively connected to the wide diameter section of the venturi channel and the first accommodation sub-chamber. When an air flow flows through the venturi channel, it passes through the positive pressure channel in the first accommodation sub-chamber. The chamber generates a positive pressure, causing the pressure difference valve to open the first valve hole, so that the gas chamber communicates with the mixed gas chamber through the second accommodation sub-chamber. The mixing valve structure of claim 1, wherein the mixed gas chamber has a mixed gas outlet, and the mixed gas outlet is away from the air chamber. The mixing valve structure of claim 1, wherein the body has a gas channel and a through hole, one end of the gas channel is connected to the second accommodation sub-chamber, and the through hole is located in the narrow diameter section, And the other end of the gas channel is connected to the narrow diameter section through the through hole. When the air flow flows through the narrow diameter section, a negative pressure is generated in the second accommodation sub-chamber through the gas channel. , causing the differential pressure valve to open the first valve hole, so that the gas chamber communicates with the mixed gas chamber through the second accommodation sub-chamber. The mixing valve structure as described in claim 3 further includes a throttle valve, which is disposed on the body and used to regulate the gas flow in the gas channel. The mixing valve structure of claim 1, wherein the differential pressure valve includes a flexible membrane, a valve stem and a valve plug. The flexible membrane is disposed on the body, and the valve plug is connected to the flexible film through the valve stem. A flexible film is used to open or close the first valve hole. The mixing valve structure as described in claim 5 further includes an adjustment screw and an adjustment spring. The adjustment screw is provided on the body. The adjustment spring is sandwiched between the adjustment screw and the flexible film to allow the adjustment. The elastic force of the spring adjusts the relative position of the valve plug and the first valve hole of the differential pressure valve through the flexible film. The mixing valve structure described in claim 5 further includes a return spring, which is sandwiched between the flexible film and the body of the differential pressure valve to drive the valve plug of the differential pressure valve to close the valve. The first valve hole. The mixing valve structure of claim 1 further includes a fan, and the air chamber has an air inlet, the air inlet is away from the mixed gas chamber, the fan is disposed at the air inlet, and the fan is used to generate the Air flow. The mixing valve structure as claimed in claim 1 further includes a pressure stabilizing valve and a second valve hole, and the gas chamber has a first gas sub-chamber and a second gas sub-chamber, the A pressure stabilizing valve is provided on the body, the first gas sub-chamber is connected to the second gas sub-chamber through the second valve hole, and the second gas sub-chamber is connected to the first gas sub-chamber through the first valve hole. The second accommodation sub-chamber is connected, and the pressure stabilizing valve is used to open or close the second valve hole, so that the first gas sub-chamber and the second gas sub-chamber are connected or not connected. . The mixing valve structure as claimed in claim 9, wherein the pressure stabilizing valve is a solenoid valve.

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