Gas valve

Abstract

The utility model discloses a gas valve which comprises a valve body provided with a valve element cavity, a gas inlet channel and a gas outlet channel, and the gas inlet channel and the gas outlet channel intersect in the valve element cavity. The valve core is rotationally mounted in the valve core cavity; the valve rod is of an integrally-formed structure, one end of the valve rod extends into the valve body and is combined with the valve element, the valve rod is used for operating the valve element to rotate, and the valve rod is provided with a zero-degree self-locking position only capable of moving in the axial direction and a working position capable of deflecting relative to the zero-degree self-locking position; the microswitch assembly comprises a first microswitch and a second microswitch, and the valve rod is provided with a first triggering part and a second triggering part which are arranged corresponding to the first microswitch and the second microswitch respectively; at the zero-degree self-locking position, the valve rod moves in the axial direction, and the first triggering part acts on the first microswitch; and at the working position, the second trigger part acts on the second microswitch. According to the gas valve, the second microswitch is synchronously turned on after ignition and gas inlet, the problem that a draught fan needs to be frequently started when ignition fails is solved, and the user experience feeling is improved.

Description

Technical Field

[0001] The present application relates to a gas valve, and in particular to a gas valve. Background Art

[0002] The gas valve is the core component of the gas stove. It generally includes a valve body, a valve core, a valve stem, a shift fork and a solenoid valve. The valve body is provided with an air inlet channel, an air outlet channel and a valve core cavity therebetween. The valve core is a cone-shaped valve installed in the valve core cavity. One end of the valve stem extends into the valve body and passes through the valve core. When the plug valve needs to be opened, the valve stem pushes the solenoid valve through the shift fork. After opening, the valve core can be driven to rotate to adjust the gas flow in the air outlet channel.

[0003] When using existing gas stoves, in order to reduce the fumes generated by cooking, the fan is usually turned on at the same time. The fan and stove ignition are generally controlled by two different micro switches on the plug valve. When the valve stem is pressed down, the two micro switches can be turned on at the same time, but at this time the stove has not taken in air and the ignition has not been successful. Therefore, the fan is started too early. If there is an ignition failure, multiple ignitions are required, which may cause the fan to be started frequently, affecting the user experience. Utility Model Content

[0004] In order to solve the above problems, the utility model provides a gas valve.

[0005] Gas valve, including:

[0006] The valve body comprises a valve core cavity, and an air inlet passage and an air outlet passage intersecting the valve core cavity;

[0007] A valve core is rotatably mounted in the valve core cavity;

[0008] The valve stem is an integrally formed structure, one end of which extends into the valve body and is combined with the valve core, and is used to manipulate the rotation of the valve core. The valve stem has a zero-degree self-locking position that can only move in the axial direction and a working position that is deflected relative to the zero-degree self-locking position;

[0009] A micro switch assembly includes a first micro switch and a second micro switch, wherein the valve stem has a first trigger portion and a second trigger portion respectively corresponding to the first micro switch and the second micro switch;

[0010] In the zero-degree self-locking position, the valve stem moves axially, and the first triggering part acts on the first micro switch; in the working position, the second triggering part acts on the second micro switch.

[0011] Several optional methods are also provided below, but they are not intended to be additional limitations on the above-mentioned overall solution, but are merely further supplements or preferences. Under the premise that there are no technical or logical contradictions, each optional method can be combined with the above-mentioned overall solution separately, and multiple optional methods can also be combined.

[0012] Optionally, the first trigger portion is located on the valve stem at a lower position than the second trigger portion.

[0013] Optionally, the second triggering portion is radially enlarged relative to the first triggering portion.

[0014] Optionally, the valve stem has an avoidance portion for avoiding acting on the second micro switch during the pressing process, and the avoidance portion and the second triggering portion are at the same height.

[0015] Optionally, the valve stem has an expanded diameter section, a reduced diameter section, and a transition section between the expanded diameter section and the reduced diameter section, the first trigger portion is arranged in the transition section, and the second trigger portion and the avoidance portion are arranged in the expanded diameter section.

[0016] Optionally, the first trigger portion and the second trigger portion are respectively an inverted conical surface and an arc surface with the valve stem axis as the center, and the avoidance portion is a plane parallel to the valve stem axis.

[0017] Optionally, the first micro switch and the second micro switch respectively have a first contact and a second contact corresponding to the first trigger portion and the second trigger portion.

[0018] Optionally, a protective sleeve is provided on the valve stem, and the protective sleeve has an opening allowing the first contact and the second contact to extend into its inner cavity.

[0019] Optionally, the protective sleeve is clearance-matched with the diameter-enlarging section, and the diameter-reducing section is hidden in the protective sleeve.

[0020] Optionally, a cover plate for closing the valve core cavity is provided at the bottom of the protective sleeve.

[0021] When the gas valve of the present application is in the zero-degree self-locking position, the valve stem is pressed, and the first trigger part can trigger the first microswitch to ignite. When it is in the working position, the valve stem is deflected, and the second trigger part can trigger the second microswitch to start the fan. Therefore, compared with the prior art, the second microswitch of the present application is synchronously opened after ignition and air intake, avoiding the problem of frequent starting of the fan when ignition fails, thereby improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the structure of a gas valve according to an embodiment of the present application;

[0023] Figure 2 for Figure 1 A cross-sectional view of the gas valve;

[0024] Figure 3 for Figure 1 Schematic diagram of the structure of the gas valve without the protective sleeve;

[0025] Figure 4 for Figure 3 Enlarged view of part A in the middle;

[0026] Figure 5 It is a schematic diagram of the structure of the protective cover;

[0027] Figure 6 Schematic diagram of the structure of the valve stem and the protective sleeve.

[0028] The reference numerals in the figures are described as follows:

[0029] 100, valve body; 110, valve core cavity; 120, air inlet passage; 130, air outlet passage;

[0030] 200, valve core; 210, elastic member;

[0031] 300, valve stem; 310, diameter expansion section; 311, second triggering part; 312, avoidance part; 320, diameter reduction section; 330, transition section; 331, first triggering part; 340, dialing needle;

[0032] 400, micro switch assembly; 410, first micro switch; 411, first contact; 420, second micro switch; 421, second contact;

[0033] 500, protective cover; 510, opening; 520, cover plate; 521, convex ring; 522, first arc segment; 523, second arc segment; 324, notch. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0035] It should be noted that when a component is referred to as being "connected" to another component, it may be directly connected to the other component or there may be a central component. When a component is referred to as being "disposed on" another component, it may be directly disposed on the other component or there may be a central component at the same time.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0037] In this application, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number or order of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0038] In this application, the terms "comprises" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a system, product or device comprising a series of units is not necessarily limited to those units explicitly listed, but may include other units not explicitly listed or inherent to these products or devices.

[0039] See also Figure 1 to Figure 6 An embodiment of the present application provides a gas valve, including a valve body 100 , a valve core 200 , a valve stem 300 and a micro switch assembly 400 .

[0040] The valve body 100 has a valve core cavity 110, and an air inlet channel 120 and an air outlet channel 130 intersecting the valve core cavity 110, wherein the air outlet channel 130 is connected to the gas stove, and the number of the air outlet channels 130 can be set according to actual needs, for example, the number is 2 in the figure. The valve core 200 is rotatably installed in the valve core cavity 110, and the valve stem 300 is an integrally formed structure, one end of which extends into the valve body 100 and is combined with the valve core 200, and is used to manipulate the rotation of the valve core 200. The valve stem 300 has a zero-degree self-locking position that can only move along the axial direction and a working position deflected relative to the zero-degree self-locking position.

[0041] The micro switch assembly 400 includes a first micro switch 410 and a second micro switch 420. The first micro switch 410 is connected to the ignition system and turns on the ignition system when triggered. The second micro switch 420 is connected to the fan system and can turn on the fan system when triggered.

[0042] The valve stem 300 has a first triggering portion 331 and a second triggering portion 311 which are respectively arranged corresponding to the first micro switch 410 and the second micro switch 420 .

[0043] In the zero-degree self-locking position, the valve stem 300 moves axially, and the first trigger portion 331 acts on the first micro switch 410 (triggering the ignition system); in the working position, the second trigger portion 311 acts on the second micro switch 420 (starting the fan system).

[0044] Therefore, the gas valve of the present application achieves a goal of pressing the valve stem when in the zero-degree self-locking position through the improvement of the valve stem structure. The first trigger part can trigger the first microswitch for ignition. When in the working position, the valve stem is deflected, and the second trigger part can trigger the second microswitch to start the fan (that is, the second microswitch is synchronously turned on after ignition and air intake), avoiding the problem of frequent starting of the fan when ignition fails, thereby improving the user experience.

[0045] See also Figure 2 to Figure 4 The first trigger portion 331 is located on the valve stem 300 at a lower position than the second trigger portion 311 , and the second trigger portion 311 is radially enlarged relative to the first trigger portion 331 .

[0046] In order to prevent the valve stem from axially moving and accidentally triggering the second micro switch 420 when in the zero-degree self-locking position, the valve stem 300 has an avoidance portion 312 that avoids acting on the second micro switch 420 during the downward pressing process. The avoidance portion 312 and the second triggering portion 311 are at the same height.

[0047] For further information, see Figure 4 The valve stem 300 has an expanded diameter section 310 , a reduced diameter section 320 and a transition section 330 between the expanded diameter section 310 and the reduced diameter section 320 . The first trigger portion 331 is disposed in the transition section 330 , and the second trigger portion 311 and the avoidance portion 312 are disposed in the expanded diameter section 310 .

[0048] In the figure, the first triggering portion 331 and the second triggering portion 311 are respectively an inverted conical surface and an arc surface with the axis of the valve stem 300 as the center, and the avoidance portion 312 is a plane parallel to the axis of the valve stem 300 .

[0049] When the valve stem 300 is pressed down, it is in the zero-degree self-locking position (i.e., it is in the ignition state, the fire has not yet come out, and the fan does not need to work). Due to the existence of the avoidance portion 312, the valve stem 300 will not contact the second microswitch 420. When the valve stem 300 rotates, the gas stove starts to fire, the second trigger portion 311 acts on the second microswitch 420, and the fan is turned on synchronously.

[0050] See also Figure 3-4 The first micro switch 410 and the second micro switch 420 respectively have a first contact 411 and a second contact 421 corresponding to the first trigger portion 331 and the second trigger portion 311 . In the figure, the outer surfaces of the first contact 411 and the second contact 421 are arc-shaped surfaces.

[0051] In this embodiment, a protective cover 500 is provided on the valve stem 300, and the protective cover 500 has an opening 510 that allows the first contact 411 and the second contact 421 to extend into its inner cavity (i.e., it has two openings 510, each for the two contacts to extend into), thereby avoiding the problem of false triggering of the micro switch assembly 400 due to interference from external factors. In the figure, the protective cover 500 is clearance-matched with the enlarged diameter section 310, and the reduced diameter section 320 is hidden in the protective cover 500.

[0052] For further information, see Figure 5-6 A cover plate 520 for closing the valve core cavity 110 is disposed at the bottom of the protective sleeve 500 , and a circumferential limiting structure is disposed between the bottom of the cover plate 520 and the valve stem 300 .

[0053] Specifically, a pin 340 is provided at the bottom of the valve stem 300, and a convex ring 521 is provided on the bottom surface of the protective cover 500. A notch 324 is provided on the convex ring 521 to match the pin 340. The pin 340 and the notch 324 cooperate to achieve the circumferential limit between the valve stem 300 and the cover plate 520 (this position is the zero-degree self-locking position). In order to control the rotation angle of the valve stem 300, the convex ring 521 includes a first arc segment 522 with a lower height and a second arc segment 523 with a higher height. The pin 340 can rotate along the first arc segment 522 until it abuts against the end of the second arc segment 523. The central angle corresponding to the first arc segment 522 is the angle at which the valve stem 300 can rotate.

[0054] The technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification. When the technical features in different embodiments are embodied in the same figure, it can be regarded that the figure also discloses the combination examples of the various embodiments involved.

[0055] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application.

Claims

1. A gas valve, characterized in that: include: The valve body comprises a valve core cavity, and an air inlet passage and an air outlet passage intersecting the valve core cavity; A valve core is rotatably mounted in the valve core cavity; The valve stem is an integrally formed structure, one end of which extends into the valve body and is combined with the valve core, and is used to manipulate the rotation of the valve core. The valve stem has a zero-degree self-locking position that can only move in the axial direction and a working position that is deflected relative to the zero-degree self-locking position; A micro switch assembly includes a first micro switch and a second micro switch, wherein the valve stem has a first trigger portion and a second trigger portion respectively corresponding to the first micro switch and the second micro switch; In the zero-degree self-locking position, the valve stem moves axially, and the first triggering part acts on the first micro switch; in the working position, the second triggering part acts on the second micro switch.

2. The gas valve according to claim 1, characterized in that: The first trigger portion is located on the valve stem at a lower position than the second trigger portion.

3. The gas valve according to claim 2, characterized in that: The second triggering portion is radially enlarged relative to the first triggering portion.

4. The gas valve according to claim 2, characterized in that: The valve stem has an avoidance portion for avoiding acting on the second micro switch during the pressing process, and the avoidance portion and the second triggering portion are at the same height.

5. The gas valve according to claim 4, characterized in that: The valve stem comprises an enlarged diameter section, a reduced diameter section and a transition section between the enlarged diameter section and the reduced diameter section. The first triggering part is arranged in the transition section, and the second triggering part and the avoidance part are arranged in the enlarged diameter section.

6. The gas valve according to claim 5, characterized in that: The first triggering portion and the second triggering portion are respectively an inverted conical surface and an arc surface with the valve stem axis as the center, and the avoidance portion is a plane parallel to the valve stem axis.

7. The gas valve according to claim 5, characterized in that: The first micro switch and the second micro switch respectively have a first contact and a second contact corresponding to the first trigger portion and the second trigger portion.

8. The gas valve according to claim 7, characterized in that: The valve stem is provided with a protective sleeve, and the protective sleeve has an opening allowing the first contact and the second contact to extend into its inner cavity.

9. The gas valve according to claim 8, characterized in that: The protective sleeve is clearance-matched with the diameter-enlarging section, and the diameter-reducing section is hidden in the protective sleeve.

10. The gas valve according to claim 8, characterized in that: A cover plate for closing the valve core cavity is arranged at the bottom of the protective sleeve.

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