Valve-element-free gas temperature control valve and outdoor oven temperature control system

Abstract

The invention relates to a valve-element-free gas temperature control valve which comprises a valve body with a gas inlet channel and a gas outlet channel and a valve rod. The valve is characterized in that the air inlet channel is directly communicated with the air outlet channel through a valve port, an adjusting rod capable of moving up and down is arranged in the valve port in a penetrating mode, a sealing plate is arranged on the adjusting rod, the sealing plate enables the opening degree of the valve port to be increased or decreased along with downward moving or upward moving of the adjusting rod, and a threaded hole is formed in the bottom of the adjusting rod; a polygonal inserting hole is formed in the bottom of the valve rod; a connecting plug matched with the inserting hole in shape and inserted into the inserting hole is arranged at the upper end of the adjusting rod; a diaphragm capsule temperature sensing component with a temperature sensing rod is fixed to the bottom of the valve body in a penetrating mode, and the upper end of the diaphragm capsule temperature sensing component is provided with a threaded column section in threaded connection with the interior of the threaded hole. The valve-element-free gas temperature control valve is simpler and more reasonable in structure, low in cost and capable of achieving the automatic temperature control function. The invention further relates to an outdoor oven temperature control system adopting the temperature control valve.

Description

Technical Field

[0001] The present invention relates to a gas valve, in particular to a valve core-free gas temperature control valve suitable for an outdoor gas oven. The present invention also relates to an outdoor oven temperature control system using the gas temperature control valve. Background Art

[0002] The temperature-controlled gas valve with a temperature-sensing rod is generally used in gas ovens. When the gas oven is working, a relatively closed space is formed inside the box. The temperature-sensing rod can accurately sense the temperature inside, so it can control the action of the adjustment structure in the temperature-controlled gas valve and stably adjust the gas output according to the setting. The existing gas grill (hereinafter referred to as gas BBQ) generally includes a furnace body and a burner arranged in the furnace body. The barbecue process is open, which is not suitable for automatic temperature control by using a temperature-controlled gas valve with a temperature-sensing rod. For this reason, most of them use manual control of the gas flow to control its firepower. A control valve is provided on the front panel of the furnace body for control, and an electronic pulse igniter is used for ignition.

[0003] Some gas ovens have multiple burners arranged side by side in the oven body, and the control valves are composed of a master control valve and multiple sub-control valves. The master control valve is responsible for ignition and opening and closing the total gas source, and the sub-control valves correspond to a burner respectively, controlling the gas volume of a single burner, and then controlling the fire of a single burner. For example, the Chinese utility model patent "A barbecue oven air intake pipe group structure" with patent number ZL201020049768.5 (publication number CN201585882U) and the Chinese utility model patent "New gas oven" with patent number ZL201620037218.9 (publication number CN205338700U) both disclose such an oven.

[0004] The master control valve used in the existing schemes is to completely open and close the total gas source, so it is a conventional gas valve with a built-in valve core. For example, the Chinese utility model patent "Structural Improved Temperature Control Valve with Ever-open Flame Function" applied by the applicant with patent number ZL201921048254.5 (publication number CN201531679U) discloses such a temperature control valve. This also forms such an inherent technical design in the design of the outdoor oven temperature control system.

[0005] This type of gas valve with a built-in valve core has high requirements for the processing of the valve core, and the cost of the valve core itself is also high, which also leads to the high cost of the existing outdoor oven temperature control system. In this era of fierce competition, how to find a lower-cost alternative to the traditional temperature control valve structure as a master control valve without affecting quality is one of the technical research and development directions that related companies need to consider. Summary of the invention

[0006] The first technical problem to be solved by the present invention is to provide a valve core-free gas temperature control valve with a simpler and more reasonable structure, low cost and automatic temperature control function in response to the above-mentioned existing technical status.

[0007] The technical solution adopted by the present invention to solve the above-mentioned first technical problem is: a valve core-free gas temperature control valve, comprising a valve body with an air inlet channel and an air outlet channel, the valve body is provided with a valve stem that can rotate around its own axis; the characteristic is that: the air inlet channel is directly connected to the air outlet channel through a valve port provided in the valve body, the air inlet channel is located below the valve port, the air outlet channel is located above the valve port, an adjusting rod that can move up and down is provided in the valve port, a sealing plate is provided on the adjusting rod, and the sealing plate increases the opening of the valve port as the adjusting rod moves downward, so The sealing plate will reduce the opening of the valve port as the adjusting rod moves upward, and a threaded hole is provided at the bottom of the adjusting rod; a polygonal plug hole is provided at the bottom of the valve stem, and the upper end of the adjusting rod has a plug connector whose shape matches the plug hole and is inserted into the plug hole, so that the rotation of the valve stem can drive the adjusting rod to rotate, and the adjusting rod can move up and down relative to the valve stem; a diaphragm box temperature-sensing component with a temperature-sensing rod is fixed at the bottom of the valve body, and the upper end of the diaphragm box temperature-sensing component has a threaded column section threadedly connected to the threaded hole, and the diaphragm box temperature-sensing component can drive the adjusting rod to move up and down through thermal expansion and contraction.

[0008] As a preferred way of installing the sealing plate on the adjusting rod, the adjusting rod has a shoulder in the middle, the sealing plate is sleeved on the adjusting rod and abuts against the shoulder, the adjusting rod is also sleeved with a pressure cover, and a spring supported between the membrane box temperature sensing component and the pressure cover is provided below the pressure cover, the spring keeps the pressure cover moving upward and presses the sealing plate between the shoulder and the pressure cover. The spring and the pressure cover press the sealing plate between the shoulder and the pressure cover to prevent the sealing plate from moving and make the sealing plate present a floating assembly, which can eliminate the error of the sealing plate installation, and the setting of the pressure cover also prevents the spring from directly contacting the sealing plate and damaging the sealing plate.

[0009] Preferably, a first sealing ring is provided between the gland and the sealing plate. The first sealing ring prevents gas from leaking from the gap between the sealing plate and the adjusting rod, and can also reduce the installation accuracy between the sealing plate and the adjusting rod.

[0010] As an improvement, the valve body is provided with an auxiliary air passage, the air inlet of the auxiliary air passage is located below the valve port, the air outlet of the auxiliary air passage is located above the valve port, and an adjusting screw for adjusting the air outlet volume of the auxiliary air passage is provided in the auxiliary air passage. When the temperature of the combustion chamber exceeds the set value, the valve plate will close or substantially close the valve port, and the air volume passing through the air outlet passage can basically only flow out from the outlet end of the air outlet passage after passing through the auxiliary air passage and the adjusting screw, so that it is kept in the minimum fire state.

[0011] Further improvement, the valve body comprises a lower valve shell, an upper valve shell and a valve cover, the upper valve shell is fixed above the lower valve shell, the valve cover is fixed above the upper valve shell, the valve stem is inserted into the valve cover, the air inlet channel and the membrane box temperature sensing component are arranged on the lower valve shell, the air outlet channel is arranged on the upper valve shell, the inlet end of the air inlet channel is arranged downward, and the outlet end of the air outlet channel is arranged laterally. The valve body is composed of three major parts, which is convenient for processing and assembly. Importantly, the inlet end of the air inlet channel is arranged downward, and the outlet end of the air outlet channel is arranged laterally, which is exactly opposite to the air inlet and outlet direction of the existing temperature control valve. This structure is more convenient for connecting the gas pipe. The air inlet channel is downward so that the temperature control valve enters the oven when it is installed on the oven, and the air outlet channel is arranged laterally, so that the air outlet channel can be arranged forward and tilted upward when the temperature control valve is installed on the oven, which is convenient for the gas distribution pipe to be arranged forward, which is convenient for connecting with the front end of the burner through the plug valve.

[0012] As an improvement, the valve stem is constrained on the valve cover and the upper valve shell and can only rotate around its own axis and cannot move up and down. The valve stem is also sleeved with a second sealing ring, which is pressed into the upper concave cavity of the upper valve shell by a pressure ring, and the pressure ring is pressed by the convex shoulder on the valve stem. Since the valve stem does not need to drive the valve core to rotate, the valve stem does not need to move up and down, so the assembly of the valve stem can be simpler.

[0013] Preferably, the lower valve housing has a joint portion extending laterally in an L shape, and the air inlet passage is arranged in the joint portion. The joint portion is arranged to facilitate connection with the main air inlet pipe, and is conducive to arranging the inlet end of the air inlet passage backward.

[0014] Compared with the existing technology, the advantages of the valve core-free gas temperature control valve are: the air inlet channel does not need to pass through the valve core but is directly connected to the air outlet channel through the valve port arranged in the valve body, overcoming the existing technical prejudice, removing the valve core, and effectively reducing costs; the gas volume is adjusted by the membrane box temperature sensing component through thermal expansion and contraction to drive the sealing plate to move up and down with the adjusting rod, and the up and down movement of the sealing plate will increase or decrease the opening of the valve port, thereby adjusting the air outlet volume of the air outlet channel; when the set temperature is to be adjusted, it is only necessary to rotate the valve stem to drive the adjusting rod to rotate, and through the principle of threaded transmission, the sealing plate is finally driven to move up or down with the adjusting rod to adjust the initial position of the sealing plate, that is, the maximum opening position of the valve port, and the temperature setting is convenient.

[0015] The second technical problem to be solved by the present invention is to provide an outdoor oven temperature control system with a reasonable structure and easy operation in response to the above-mentioned existing technical status. The total air intake of the temperature control system can be automatically adjusted, and the fire size of each burner can be adjusted and can be turned off individually.

[0016] The technical solution adopted by the present invention to solve the above-mentioned second technical problem is: an outdoor oven temperature control system, comprising a plurality of burners arranged in the inner cavity of the oven, a number of stopcock valves with adjustable gas outlet amounts corresponding to the burners, a gas distribution pipe and a main air inlet pipe, the air inlet end of each of the burners is connected to the air outlet of a corresponding stopcock valve, each of the stopcock valves is provided with an ignition device for igniting the corresponding burner, and the air inlet of each stopcock valve is connected to the gas distribution pipe; it is characterized in that: it also includes the aforementioned valve coreless gas temperature control valve, the gas distribution pipe is also connected to the air outlet channel of the valve coreless gas temperature control valve, the temperature sensing rod of the diaphragm box temperature sensing component can be extended into the inner cavity of the oven to sense the temperature therein, and the sealing plate is finally driven to move up or down through the thermal expansion and contraction of the diaphragm box temperature sensing component, and the main air inlet pipe is connected to the air inlet channel of the valve coreless gas temperature control valve.

[0017] Compared with the existing technology, the advantages of this outdoor oven temperature control system are: the gas is distributed to each burner by using a gas temperature control valve with a temperature sensing rod without a valve core as the main valve, overcoming the existing technical prejudice. The gas temperature control valve as the main valve does not have a fire-off function. The fire size and fire opening and closing of each burner are controlled by the corresponding plug valve. Compared with the existing outdoor oven temperature control system, the main valve has a simple structure and low cost, thereby reducing the cost of the entire temperature control system. The temperature sensing rod extends into the oven cavity to sense the temperature inside, which makes the gas oven with a furnace cover not only have the barbecue possibility of a traditional oven, but also have the function of a gas oven. When the oven hood is opened, because the temperature sensing rod is exposed to the air at the same time, the temperature inside the oven is connected with the temperature outside the oven, and the temperature sensed by the temperature sensing rod is lower than the set temperature, so that the membrane box temperature sensing component is in a state of maximum flow; but when the oven hood is closed, a relatively closed baking space is formed, and the air temperature in the oven cavity rises, then the temperature sensing rod comes into play, and in the initial stage, the temperature in the oven cavity does not reach the set temperature, the air outlet channel of the temperature-controlled gas valve is a large-flow air outlet, and the burner is in a high-fire state; when the temperature in the oven cavity is higher than the set temperature, the membrane box temperature sensing component in the temperature-controlled gas valve is actuated to reduce the air outlet volume of the air outlet channel of the temperature-controlled gas valve, and the burner is in a low-fire state; when the temperature in the oven cavity is lower than the set temperature, the membrane box temperature sensing component in the temperature-controlled gas valve is actuated to increase the air outlet volume at the air outlet end of the temperature-controlled gas valve, and again puts the burner in a high-fire state, so that the oven acts as a gas oven. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A three-dimensional diagram of a gas temperature control valve without a valve core Figure 1 ;

[0019] Figure 2 A three-dimensional diagram of a gas temperature control valve without a valve core Figure 2 ;

[0020] Figure 3It is a cross-sectional view of a gas temperature control valve without a valve core (along the axial direction of the gas outlet channel);

[0021] Figure 4 It is a cross-sectional view of a gas temperature control valve without a valve core (along the axial direction of the air intake passage);

[0022] Figure 5 Schematic diagram of the temperature control system of an outdoor oven. DETAILED DESCRIPTION

[0023] The present invention is further described in detail below with reference to the accompanying drawings.

[0024] like Figures 1 to 4 FIG. 1 is a preferred embodiment of the gas cock valve of the present invention.

[0025] A valve core-free gas temperature control valve comprises a valve body 1 having an air inlet passage 1a and an air outlet passage 1b. A valve stem 2 which can rotate around its own axis is passed through the valve body 1.

[0026] The air inlet channel 1a is directly connected to the air outlet channel 1b through the valve port 1c provided in the valve body 1. The air inlet channel 1a is located below the valve port 1c, and the air outlet channel 1b is located above the valve port 1c. An adjusting rod 3 that can move up and down is inserted into the valve port 1c. A sealing plate 4 is provided on the adjusting rod 3. The sealing plate 4 increases the opening of the valve port 1c as the adjusting rod 3 moves downward, and decreases the opening of the valve port 1c as the sealing plate 4 moves upward as the adjusting rod 3 moves upward. A threaded hole 31 is provided at the bottom of the adjusting rod 3. A polygonal plug hole 21 is provided at the bottom of the valve body 1, and a plug connector 31 is provided at the upper end of the adjusting rod 3, the shape of which matches the plug hole 21 and is inserted therein, so that the rotation of the valve stem 2 can drive the adjusting rod 3 to rotate, and the adjusting rod 3 can move up and down relative to the valve stem 2; a diaphragm box temperature sensing component 6 with a temperature sensing rod 61 is fixedly provided at the bottom of the valve body 1, and the upper end of the power component of the diaphragm box temperature sensing component 6 has a threaded column section 62 threadedly connected in the threaded hole 31, and the diaphragm box temperature sensing component 6 can drive the adjusting rod 3 to move up and down through thermal expansion and contraction.

[0027] The diaphragm box temperature sensing component 6 is a prior art. The diaphragm box temperature sensing component 6 is connected to the temperature sensing rod 61 through a heat-conducting component. There is temperature-sensing oil inside the diaphragm box temperature sensing component 6. The power component of the diaphragm box temperature sensing component 6 is driven to move up and down by thermal expansion and contraction. When the burner temperature reaches a certain temperature, the temperature sensing rod 61 transfers the heat to the temperature sensing oil through the heat-conducting component. The power component moves up and down under the push of the temperature sensing oil, driving the adjustment rod 3 to move up and down, and finally adjusting the upper and lower positions of the sealing plate 4 to control the gas output of the gas outlet channel 1b. Generally speaking, the sealing plate 4 will not completely close the valve port 1c.

[0028] The valve body 1 includes a lower valve shell 11, an upper valve shell 12 and a valve cover 13. The upper valve shell 12 is fixed on the upper part of the lower valve shell 11, the valve cover is fixed on the upper part of the upper valve shell 12, the valve stem 2 is inserted into the valve cover 13, the air inlet channel 1a and the diaphragm box temperature sensing component 6 are arranged on the lower valve shell 11, and the air outlet channel 1b is arranged on the upper valve shell 12. The inlet end of the air inlet channel 1a is arranged downward, and the outlet end of the air outlet channel 1b is arranged laterally. The lower valve shell 11 has a joint part 111 extending laterally in an L shape, and the air inlet channel 1a is arranged in the joint part 111.

[0029] The valve stem 2 is constrained on the valve cover 13 and the upper valve shell 12 and can only rotate around its own axis but cannot move up and down. A second sealing ring 21 is also sleeved on the valve stem 2. The second sealing ring 21 is pressed into the upper concave cavity 121 of the upper valve shell 12 by a pressure ring 22, and the pressure ring 22 is pressed by the boss on the valve stem 2.

[0030] The middle of the adjusting rod 3 has a shoulder 32, the sealing plate 4 is sleeved on the adjusting rod 3 and abuts against the shoulder 32, the adjusting rod 3 is also sleeved with a pressure cover 51, and a spring 5 supported between the membrane box temperature sensing component 6 and the pressure cover 51 is provided below the pressure cover 51, the spring 5 keeps the pressure cover 51 moving upward and presses the sealing plate 4 between the shoulder 32 and the pressure cover 51. A first sealing ring 52 is provided between the pressure cover 51 and the sealing plate 4.

[0031] An auxiliary air channel 1d is provided in the valve body 1, the air inlet 1d1 of the auxiliary air channel 1d is located below the valve port 1c, the air outlet 1d2 of the auxiliary air channel 1d is located above the valve port 1c, and an adjusting screw 10 for adjusting the air outlet volume of the auxiliary air channel 1d is penetrated in the auxiliary air channel 1d.

[0032] The air inlet channel 1a is directly connected to the air outlet channel 1b through the valve port 1c arranged in the valve body 1 without passing through the valve core, which overcomes the existing technical prejudice, removes the valve core, and effectively reduces the cost; the adjustment of the gas volume is that the membrane box temperature sensing component 6 can drive the sealing plate 4 to move up and down with the adjusting rod 3 through thermal expansion and contraction. The up and down movement of the sealing plate 4 will increase or decrease the opening of the valve port 1c, thereby adjusting the air outlet volume of the air outlet channel 1b; when the set temperature is to be adjusted, it is only necessary to rotate the valve stem 2 to drive the adjusting rod 3 to rotate, and through the principle of threaded transmission, it will eventually drive the sealing plate 4 to move up or down with the adjusting rod 3, and adjust the initial position of the sealing plate 4, that is, the maximum opening position of the valve port 1c, so that the temperature setting is convenient.

[0033] like Figure 5 FIG. 1 is a preferred embodiment of the temperature control system for an outdoor oven according to the present invention.

[0034] A temperature control system for an outdoor oven comprises a plurality of burners 7 arranged in an inner cavity of the oven, a number of stopcock valves 8 for adjusting the gas outlet corresponding to the number of the burners 7, a gas distribution pipe 9 and a main air inlet pipe 10, the air inlet end of each of the burners 7 is connected to the air outlet of a corresponding stopcock valve 8, each of the stopcock valves 8 is provided with an ignition device 81 for igniting the corresponding burner 7, and the air inlet of each stopcock valve 8 is connected to the gas distribution pipe 9; it also comprises a valve coreless gas temperature control valve of the aforementioned embodiment, the gas distribution pipe 9 is also connected to the air outlet channel 1b of the valve coreless gas temperature control valve, the temperature sensing rod 61 of the diaphragm box temperature sensing component 6 can be extended into the inner cavity of the oven to sense the temperature therein, and the sealing plate 4 is finally driven to move up or down through the thermal expansion and contraction of the diaphragm box temperature sensing component 6, and the main air inlet pipe 10 is connected to the air inlet channel 1a of the valve coreless gas temperature control valve.

[0035] The working principle and process of this outdoor oven temperature control system are as follows.

[0036] The main difference between the temperature control system of the outdoor oven and the prior art is that the valveless gas temperature control valve used in the temperature control system only has the function of automatically adjusting the air intake, and has no function of igniting and closing the air intake. The fire size and the opening and closing of each burner 7 are controlled by the corresponding plug valve 8. The gas volume is regulated by the membrane box temperature sensing component 6, which can drive the sealing plate 4 to move up and down with the adjusting rod 3 through thermal expansion and contraction. The up and down movement of the sealing plate 4 will increase or decrease the opening of the valve port 1c, and then adjust the gas output of the air outlet channel 1b; when the set temperature is to be adjusted, it is only necessary to rotate the valve stem 2 to drive the adjusting rod 3 to rotate, and finally drive the sealing plate 4 to move up or down with the adjusting rod 3 through the principle of threaded transmission, and adjust the initial position of the sealing plate 4, that is, the maximum opening position of the valve port 1c, so that the temperature setting is convenient.

[0037] When the furnace hood is opened, the temperature sensing rod 61 is exposed to the air at the same time, the temperature inside the furnace is connected with the temperature outside the furnace, and the temperature sensed by the temperature sensing rod 61 is lower than the set temperature, so that the diaphragm box temperature sensing component 6 is in a state of maximum flow; the gas outlet channel 1b of the temperature-controlled gas valve enters the gas distribution pipe 9 (inlet gas volume) at the maximum state. Of course, the fire size and fire opening and closing of each burner 7 are ultimately controlled by their corresponding stopcock valves 8.

[0038] However, when the oven cover is closed, a relatively closed baking space is formed, and the air temperature in the oven cavity rises, the temperature sensing rod 61 comes into play. At the beginning, the temperature in the oven cavity does not reach the set temperature, and the outlet channel 1b of the temperature-controlled gas valve enters the gas distribution pipe 9 (inlet gas volume) with a large flow rate, and the burner is in a high-fire state; when the temperature in the oven cavity is higher than the set temperature, the diaphragm box temperature sensing component 6 in the temperature-controlled gas valve is actuated to reduce the gas outlet volume of the outlet channel 1b of the temperature-controlled gas valve, and the burner is in a low-fire state; when the temperature in the oven cavity is lower than the set temperature, the diaphragm box temperature sensing component 6 in the temperature-controlled gas valve is actuated to increase the gas outlet volume at the outlet end of the temperature-controlled gas valve, and the burner 7 is in a high-fire state again, so that the oven functions as a gas oven. This makes the gas oven with an oven cover not only have the grilling capabilities of a traditional oven, but also have the functions of a gas oven.

[0039] It should be noted that in the description of this embodiment, the terms "front, rear", "left, right", "up, down", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. The terms "install", "connect", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A valve core-less gas temperature control valve, comprising a valve body (1) having an air inlet channel (1a) and an air outlet channel (1b), wherein a valve stem (2) capable of rotating around its own axis is provided on the valve body (1); the characteristics are: The air inlet passage (1a) is directly connected to the air outlet passage (1b) through a valve port (1c) provided in the valve body (1); the air inlet passage (1a) is located below the valve port (1c), and the air outlet passage (1b) is located above the valve port (1c); an adjusting rod (3) that can move up and down is inserted into the valve port (1c); a sealing plate (4) is provided on the adjusting rod (3); the sealing plate (4) increases the opening of the valve port (1c) as the adjusting rod (3) moves downward, and decreases the opening of the valve port (1c) as the sealing plate (4) moves upward as the adjusting rod (3); a threaded hole is provided at the bottom of the adjusting rod (3). (31); a polygonal plug hole (21) is provided at the bottom of the valve stem (2); the upper end of the regulating rod (3) has a plug connector (31) whose shape matches the plug hole (21) and is inserted into the plug hole, so that the rotation of the valve stem (2) can drive the regulating rod (3) to rotate, and the regulating rod (3) can move up and down relative to the valve stem (2); a diaphragm box temperature sensing component (6) with a temperature sensing rod (61) is fixedly provided at the bottom of the valve body (1); the upper end of the diaphragm box temperature sensing component (6) has a threaded column section (62) threadedly connected in the threaded hole (31); the diaphragm box temperature sensing component (6) can drive the regulating rod (3) to move up and down through thermal expansion and contraction.

2. The valve core-less gas temperature control valve according to claim 1, characterized in that: The adjusting rod (3) has a stop shoulder (32) in the middle, the sealing plate (4) is sleeved on the adjusting rod (3) and abuts against the stop shoulder (32), the adjusting rod (3) is also sleeved with a pressure cover (51), and a spring (5) supported between the membrane box temperature sensing component (6) and the pressure cover (51) is provided below the pressure cover (51), the spring (5) enables the pressure cover (51) to maintain an upward movement trend, and presses the sealing plate (4) between the stop shoulder (32) and the pressure cover (51).

3. The valve core-less gas temperature control valve according to claim 2, characterized in that: A first sealing ring (52) is provided between the gland (51) and the sealing plate (4).

4. The valve core-less gas temperature control valve according to claim 1, characterized in that: An auxiliary air channel (1d) is provided in the valve body (1), an air inlet (1d1) of the auxiliary air channel (1d) is located below the valve port (1c), an air outlet (1d2) of the auxiliary air channel (1d) is located above the valve port (1c), and an adjusting screw (10) for adjusting the air outlet volume of the auxiliary air channel (1d) is provided in the auxiliary air channel (1d).

5. The valve core-less gas temperature control valve according to any one of claims 1 to 4, characterized in that: The valve body (1) comprises a lower valve shell (11), an upper valve shell (12) and a valve cover (13); the upper valve shell (12) is fixed on the upper part of the lower valve shell (11); the valve cover is fixed on the upper part of the upper valve shell (12); the valve stem (2) is inserted into the valve cover (13); the air inlet channel (1a) and the diaphragm box temperature sensing component (6) are arranged on the lower valve shell (11); the air outlet channel (1b) is arranged on the upper valve shell (12); the inlet end of the air inlet channel (1a) is arranged downward, and the outlet end of the air outlet channel (1b) is arranged laterally.

6. The valve core-less gas temperature control valve according to claim 5, characterized in that: The valve stem (2) is constrained on the gland and the upper valve shell (12) and can only rotate around its own axis but cannot move up and down. A second sealing ring (21) is also sleeved on the valve stem (2). The second sealing ring (21) is pressed into the upper concave cavity (121) of the upper valve shell (12) by a pressing ring (22), and the pressing ring (22) is pressed by a convex shoulder on the valve stem (2).

7. The valve core-less gas temperature control valve according to claim 5, characterized in that: The lower valve housing (11) has a joint portion (111) extending laterally in an L-shape, and the air inlet passage (1a) is arranged in the joint portion (111).

8. An outdoor oven temperature control system, comprising a plurality of burners (7) arranged in an oven cavity, plug valves (8) with a number corresponding to the number of burners (7) and capable of adjusting the gas output, a gas distribution pipe (9) and a main air inlet pipe (10), wherein the air inlet end of each burner (7) is connected to the air outlet of a corresponding plug valve (8), each plug valve (8) is provided with an ignition device (81) for igniting the corresponding burner (7), and the air inlet of each plug valve (8) is connected to the gas distribution pipe (9); characterized in that: It also includes a valve coreless gas temperature control valve as described in any of the preceding claims, wherein the gas distribution pipe (9) is also connected to the air outlet channel (1b) of the valve coreless gas temperature control valve, and the temperature sensing rod (61) of the membrane box temperature sensing component (6) can be extended into the inner cavity of the oven to sense the temperature therein, and the thermal expansion and contraction of the membrane box temperature sensing component (6) ultimately drives the sealing plate (4) to move up or down, and the main air inlet pipe (10) is connected to the air inlet channel (1a) of the valve coreless gas temperature control valve.

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