TWI495828B - Interchangeable gas furnace and its control method - Google Patents

Description

Linkage gas furnace and control method thereof

The present invention relates to a gas furnace, and more particularly to a linked gas furnace and a control method therefor.

According to the gas stove, the gas stove is the most commonly used heating material for cooking food. Compared with the induction cooker, which converts electrical energy into heat energy, the control mode of the gas furnace is simple, and the heat energy generated by burning gas is greater than the heat energy generated by using electricity. It can effectively reduce the cooking time.

1 is a structure of a conventional gas burner combustion apparatus comprising a burner 10, a mixing tube 12 connected to the burner 10, and a nozzle 14 connected to a gas source. The mixing tube 12 has a plurality of air inlets 122 having an opening 142 in the mixing tube 12. When the gas passes through the opening 142 of the nozzle 14, the air outside the mixing tube 12 is introduced into the mixing tube 12 from the air inlet holes 122 to generate a first mixing, and then sent to the burner 10 through the mixing tube 12. The second air is mixed with the air around the burner 10 and burned. The thermal energy generated by the burner 10 is related to the ratio of the amount of gas and the amount of air. When the amount of gas and the amount of air reach a preferred ratio, the thermal efficiency of the burner 10 is relatively high.

The gas obtained by mixing the gas furnace of the conventional gas furnace has a limited amount of air, so the combustion efficiency cannot be improved. Higher heat energy required to cook food At that time, only the amount of gas can be provided to increase the flame, thereby increasing the heating area of the pan to achieve the required heat energy. However, providing more gas represents more gas consumption, and today, with the growing shortage of fossil fuels, it is impossible to effectively save gas consumption. Increasing the flame is more likely to cause people to burn or ignite flammable materials near the gas stove. Moreover, under the premise that the amount of air obtained is limited, the increase of gas volume alone will result in incomplete combustion of gas, which will lead to an increase in carbon monoxide. If there is no good ventilation environment, it may cause carbon monoxide poisoning.

In view of this, the main object of the present invention is to provide a linked gas furnace and a control method thereof, which can effectively improve the thermal efficiency of the gas furnace and save the amount of gas.

In order to achieve the above object, the linked gas furnace provided by the present invention comprises a burner, a mixer, a blower, a gas regulator and a control device. Wherein, the mixer is for mixing gas and air and is sent to the burner, the mixer has a main passage and a first side port, the main passage is connected to the burner; the blower is internally provided with a fan for introducing air to the blower. a mixer that is controlled to change a rotational speed and change a wind pressure generated by the blower; a portion of the airflow generated by the blower enters the main passage, and another portion of the airflow communicates with the first side port; the gas regulator system Arranging on a gas line connected to one of the mixers, the gas regulator is connected to the first side port, and the gas regulator adjusts the gas flow rate to be supplied to the mixer according to the wind pressure generated by the blower; The The operating device is electrically connected to the blower for controlling the speed of the fan.

According to the above concept, the present invention further provides a control method for a linked gas furnace comprising the following steps: A. starting the fan operation to provide a predetermined amount of air to the mixer; B. injecting a portion of the air in step A The first side port controls the gas regulator to regulate a gas flow rate to be supplied to the mixer to a predetermined gas flow rate; and C. mixes the air of another portion of the step A with the gas of the step B in the mixer It is then sent to the burner for combustion.

Therefore, through the interlocking gas furnace and the control method thereof, it is only necessary to control the rotation speed of the fan of the air blower to achieve the effect of simultaneously letting a certain amount of air and a certain amount of gas enter the burner to be mixed and burned, without increasing the amount of gas. Underneath, effectively improve the thermal efficiency of gas burning in gas furnaces.

In order to explain the present invention more clearly, the following examples are set forth in the accompanying drawings in detail.

2 to 7 show a linked gas furnace according to a preferred embodiment of the present invention, comprising a burner 16, a mixer 18, a blower 28, a gas regulator 34 and a handling device 64. Wherein: the burner 16 is for burning gas to heat a gas above the burner 16 Pot body.

The mixer 18 is configured to mix gas and air and deliver the same to the burner 16. In the embodiment, the mixer 18 includes a main body 20 having an air inlet 201, an air outlet 202, and a first Side port 203 and a second side port 204. A main passage 205 is defined between the air inlet 201 and the air outlet 202. The first side port 203 is located between the air inlet 201 and the air outlet 202 and communicates with the main channel 205. The second side port 204 is located. The first side port 203 and the air outlet 202 communicate with the main channel 205. In order to facilitate the connection of the pipeline, the mixer 18 further includes a first extension tube 24 and a second extension tube 26, the first extension tube 24 and the second extension tube 26 are connected to the main body 20 and respectively communicate with the first extension tube One side port 203 and the second side port 204. The inner wall of the main body 20 extends from a wind collecting portion exemplified by the baffle 22, and the baffle 22 is located between the first side port 203 and the main passage 205.

The blower 28 includes a housing 30 and a fan 32. The housing 30 includes an inlet end 302 and an outlet end 304. The outlet end 304 communicates with the inlet port 201 of the mixer 18. The fan 32 is disposed within the housing 30 and is controllable to vary the rotational speed and to vary the amount of wind pressure within the blower 28. The fan 32 is forced to introduce air from the inlet end 302 during operation and enters the mixer 18 from the outlet end 304. Airflow entering a portion of the mixer 18 enters the main passage 205, and another portion of the airflow is directed to the first side port 203 by the baffle 22.

The gas regulator 34 is disposed in a gas tube connected to the mixer 18 On the road 70. Referring to FIG. 4, in the present embodiment, the gas regulator 34 includes a control valve 36 and a regulating valve 50. Wherein: the control valve 36 includes a first valve body 38, a first valve 40 and a spring 46. The first valve body 38 has an inlet end 381, an outlet end 382, a passage opening 383, a first passage 386 and a second passage 387. The inlet end 381 is in communication with the gas line 70 and the outlet end 382 is in communication with the second extension tube 26 of the mixer 18. The first valve 40 is disposed in the first valve body 38, and divides the interior of the first valve body 38 into a first air chamber 384 and a second air chamber 385. The first air chamber 384 communicates with the inlet end 381. And the first air chamber 384 and the second air chamber 385 communicate with each other through the first hole 386. The second bore 387 communicates with the outlet end 382. Both ends of the spring 46 abut the first valve 40 and the inner wall of the first valve body 38, respectively. The aforementioned inlet end 381, first air chamber 384, passage port 383 and outlet end 382 together form a main gas passage 48 in the state shown in FIG. 6, and the first valve 40 is in the state shown in FIG. The main gas passage 48 can be blocked.

The regulating valve 50 includes a second valve body 52 and a second valve 54. The second valve body 52 is coupled to the first valve body 38. The second valve body 52 includes an opening 524 and a pressure relief port 526. The second valve 54 includes an elastic membrane 56 and a connecting rod 58. The elastic membrane 56 is disposed in the second valve body 52, and the elastic membrane 56 divides the second valve body 52 into a non-intersecting one. A chamber 522 and a second chamber 523. The first chamber 522 The opening 524 is communicated and the opening 524 communicates with the first extension tube 24 of the mixer 18 through an air duct 62. The second chamber 523 communicates with the second passage 387 of the first valve body 38 and the second air chamber 385 that communicates with the first valve body 38 through the pressure relief port 526. One end of the connecting rod 58 is coupled to the elastic film 56, and the other end passes through the pressure releasing port 526. The connecting rod 58 can be driven by the elastic film 56 at a first position P1 shown in FIG. 5 and shown in FIG. One of the second positions P2 reciprocates to close or open the pressure relief port 526. The pressure relief port 526, the second chamber 523 and the second port 387 of the first valve body 38 together form a pressure relief passage 60 as shown in FIG. 6, and the second valve 54 is located in the pressure relief passage. On the path of 60.

When the blower 28 is not in operation, the link 58 of the second valve 54 is located at the first position P1, and the link 58 closes the pressure relief port 526 (refer to FIG. 5), that is, blocks the pressure relief passage 60. At this time, the first air chamber 384 of the control valve 36 is equal to the air pressure of the second air chamber 385, and the first valve 40 is pushed against the spring 46 to contact the passage opening 383 to block the main gas passage 48.

Referring to FIG. 6 and FIG. 7, when the blower 28 is operated, the wind pressure generated by the blower 28 is poured into the first chamber 522 of the regulating valve 50 by the mixer 18 to form a force F to the elastic film 56. Pushing in the direction of the second chamber 523, the link 58 is pushed to the second position P2, and a gap D is generated between the link 58 and the pressure relief port 526 (refer to FIG. 7), which is opened. The pressure relief passage 60. At this time, the gas of the second gas chamber 385 From the pressure relief passage 60 to the outlet end 382 of the first valve body 38, the air pressure of the second air chamber 385 of the control valve 36 is lowered, and the second air chamber 385 is opposite to the air pressure of the first air chamber 384. Lower, thus creating a pressure differential. When the pressure difference is greater than the force of the spring 46 pushing against the first valve 40, the first valve 40 is pushed to the second air chamber 385, opening the main gas passage 48, so that the gas passes through the gas regulator 34. And entering the mixer 18 for mixing with air from the blower 28.

As can be seen from the above, by controlling the rotational speed of the blower 28 fan 32 to generate different wind pressures, the degree of opening of the first valve 40 can be indirectly controlled, thereby regulating the flow of gas to the mixer 18.

The operating device 64 is electrically connected to the blower 28 for controlling the rotational speed of the fan 32. In the present embodiment, the operating device 64 includes an operating interface exemplified by the knob 66 and a controller 68. The knob 66 is electrically connected to the controller 68 for the user to adjust the rotation speed of the fan 32. The controller 68 sends a corresponding voltage to the blower 28 according to the rotation amplitude of the knob 66, thereby controlling the rotation speed of the fan 32. When the rotation amplitude of the knob 66 is larger, the higher the voltage sent, the faster the fan 32 rotates, and the amount of air and the amount of gas delivered to the mixer 18 are relatively increased, whereby the user adjusts the knob. 66, the firepower of the burner 16 can be controlled. In practice, in addition to the knob adjustment method, it can also be designed as a button adjustment method, and the operation interface can also be connected to the controller by wireless transmission.

Using the above structural design, the connection is performed through the control method described below Control of the dynamic gas furnace. The control method includes the following steps:

A. The fan 32 is activated to operate such that the blower 28 provides a predetermined amount of air to the mixer 18.

B. Injecting air from a portion of step A into the first side port 203 through the baffle of the mixer 18, thereby controlling the position of the first valve 40 of the control valve 36 to regulate delivery to the mixer 18. The gas flow rate is a predetermined gas flow rate, and the aforementioned gas is injected into the second side port 204 of the mixer 18.

C. When the air of another portion of step A enters the main passage 205 through the second side port 204, the gas of step B is introduced into the gas stream and mixed in the mixer 18 and sent to the burner 16 for combustion.

D. The steering device 64 controls the rotational speed of the fan 32 such that the gas regulator 34 regulates the gas flow rate for delivery to the mixer 18 to a gas flow rate corresponding to the rotational speed of the fan 32.

Thereby, the gas flow rate can be indirectly controlled by controlling the rotation speed of the fan 32, and a certain amount of gas and air can enter the burner 16 to burn.

Through the interlocking gas furnace and the control method thereof provided by the invention, it is only necessary to separately control the rotation speed of the air blower to achieve the effect of supplying a certain amount of air and a certain amount of gas simultaneously to the burner for mixed combustion, compared with the conventional use. The gas burner can effectively save gas consumption. It is worth mentioning that, because the blower and the gas regulator are mechanically linked, when the blower ages and the speed is reduced, the gas flow to the mixer is also reduced, so that the amount of air and gas can still be reduced. A certain mixing ratio is achieved without causing incomplete combustion of gas.

The above description is only a preferred embodiment of the present invention, and is not all embodiments of the present invention. Variations in the equivalent structures and equivalent methods of the present invention and the scope of the claims are intended to be included in the scope of the invention.

10‧‧‧ burner

12‧‧‧ Mixing tube

122‧‧‧Inlet holes

14‧‧‧Nozzles

142‧‧‧ openings

16‧‧‧ burner

18‧‧‧Mixer

20‧‧‧ Subject

201‧‧‧ inlet

202‧‧‧ outlet

203‧‧‧ first side port

204‧‧‧Second side

205‧‧‧ main channel

22‧‧‧Baffle

24‧‧‧First extension tube

26‧‧‧Second extension tube

28‧‧‧Blowers

30‧‧‧Shell

302‧‧‧ entrance end

304‧‧‧export end

32‧‧‧fan

34‧‧‧ Gas Regulator

36‧‧‧Control valve

38‧‧‧First valve body

381‧‧‧ entrance end

382‧‧‧export end

383‧‧‧ passage

384‧‧‧First air chamber

385‧‧‧Second chamber

386‧‧‧ first tunnel

387‧‧‧Second hole

40‧‧‧First valve

46‧‧‧ Spring

48‧‧‧Main Gas Passage

50‧‧‧Regulator

52‧‧‧Second body

522‧‧‧First room

523‧‧‧Second room

524‧‧‧ openings

526‧‧ ‧pressure relief

54‧‧‧Second valve

56‧‧‧elastic film

58‧‧‧ linkage

60‧‧‧Relief passage

62‧‧‧air duct

64‧‧‧Control device

66‧‧‧ knob

68‧‧‧ Controller

70‧‧‧ gas pipeline

D‧‧‧ gap

F‧‧‧force

P1‧‧‧ first position

P2‧‧‧ second position

1 is a schematic view of a combustion apparatus of a conventional gas furnace; FIG. 2 is a schematic view of a gas turbine of a preferred embodiment of the present invention; FIG. 3 is a schematic view of a mixer according to a preferred embodiment of the present invention; FIG. 5 is a partial enlarged view of FIG. 4, illustrating a pressure relief passage block; FIG. 6 is a schematic diagram of a main gas passage opening of a gas regulator according to a preferred embodiment of the present invention; and FIG. 7 is a schematic diagram of FIG. A partial enlargement of the figure reveals that the pressure relief path is open.

16‧‧‧ burner

18‧‧‧Mixer

201‧‧‧ inlet

202‧‧‧ outlet

24‧‧‧First extension tube

26‧‧‧Second extension tube

28‧‧‧Blowers

30‧‧‧Shell

302‧‧‧ entrance end

304‧‧‧export end

32‧‧‧fan

34‧‧‧ Gas Regulator

36‧‧‧Control valve

381‧‧‧ entrance end

382‧‧‧export end

50‧‧‧Regulator

62‧‧‧air duct

64‧‧‧Control device

66‧‧‧ knob

68‧‧‧ Controller

70‧‧‧ gas pipeline

Claims (11)

A interlocking gas furnace comprising: a burner; a mixer for mixing gas and air to the burner, the mixer having a main passage and a first side port, the main passage communicating with the burner a blower having a fan internally for introducing air to the mixer, the fan being controlled to change the rotational speed and changing the wind pressure generated by the blower; a portion of the airflow generated by the blower enters the main passage, and the other portion a gas flow is connected to the first side port; a gas regulator is disposed on the gas line connected to one of the mixers, the gas regulator is connected to the first side port, and the gas regulator is generated by the blower Adjusting the gas flow rate for the gas to the mixer; and an operating device electrically connected to the blower for controlling the rotation speed of the fan; wherein the mixer has a collecting portion for generating the blower A portion of the airflow is directed to the first side port. The interlocking gas furnace according to claim 1, wherein the wind collecting portion is a baffle extending from an inner wall of the mixer, the baffle being located between the main passage and the first side port. The interlocking gas furnace of claim 1, wherein the mixer has a second side port communicating with the main passage, the second side port being located between the first side port and the burner, flowing through the gas regulator The gas enters the main passage from the second side port. The interlocking gas furnace of claim 1, wherein the mixer has a first The two side ports communicate with the main passage; the gas regulator includes a regulating valve and a control valve, the regulating valve has an opening communicating with the first side port, the control valve having an inlet end communicating with the gas line and an outlet end The second side port is connected, and the regulating valve is driven by the wind pressure generated by the blower to control the control valve to adjust the gas flow rate to be supplied to the mixer. The interlocking gas furnace of claim 4, wherein the control valve comprises a first valve body and a first valve, the first valve body having the inlet end, the outlet end and a main gas passage communicating with the inlet end And the outlet end, the first valve is located on the path of the main gas passage; the regulating valve includes a second valve body and a second valve, the opening is located on the second valve body, the first valve body and the Forming a pressure relief passage between the second valve body, the second valve is located in the path of the pressure relief passage; the second valve is driven by the wind pressure generated by the blower between a first position and a second position Reciprocating, in the first position, the second valve blocks the pressure relief passage, causing the first valve to block the main gas passage, and in the second position, the second valve opens the pressure relief passage The first valve is opened to the main gas passage. The interlocking gas furnace of claim 5, wherein the first valve body has a first gas chamber and a second gas chamber, the first valve being located between the first gas chamber and the second gas chamber, The second air chamber communicates with the pressure relief passage; when the second valve is in the first position, the air pressure of the first air chamber is equal to the air pressure of the second air chamber, and the first valve blocks the main gas passage When the second valve is in the second position, the air pressure of the second air chamber is smaller than the air pressure of the first air chamber, and the first valve opens the main gas passage. A linked gas furnace as claimed in claim 1, wherein the control device comprises The operation interface allows the user to adjust the speed of the fan. A control method for a linked gas furnace, the linked gas furnace comprising a burner, a mixer connected to the burner, and a blower and a gas regulator connected to the mixer, the mixer having a first side port Connecting the gas regulator, the mixer further has a wind collecting portion, and the fan is internally provided with a fan, the control method comprises the following steps: A. starting the fan operation to provide a predetermined amount of air to the mixer; B. injecting a portion of the air from step A into the first side port to control the gas regulator to regulate the flow of gas to the mixer to a predetermined gas flow rate, wherein the air portion of step A is subjected to the set The wind portion is directed to be injected into the first side port; and C. the air from the other portion of step A is mixed with the gas of step B in the mixer and sent to the burner for combustion. The control method of the linked gas furnace according to claim 8, wherein after the step C, the rotation speed of the fan is controlled, so that the gas regulator adjusts the gas flow rate to the mixer to correspond to the rotation speed of the fan. Gas flow. The control method of a linked gas furnace according to claim 9, wherein the gas flow rate to be supplied to the mixer is proportional to the rotation speed of the fan. The control method of the linked gas furnace according to claim 8, wherein the gas regulator comprises a regulating valve and a control valve, the regulating valve is connected to the second side port, and the regulating valve is driven by the wind pressure to control the control The valve regulates the flow of gas to the mixer.