TWI476354B - Gas furnace with constant temperature effect and its control method - Google Patents

Description

Gas barbecue stove with constant temperature effect and control method thereof

The invention relates to a gas barbecue oven, and more particularly to a gas oven with a constant temperature effect and a control method thereof.

Barbecue is a leisure activity that many people like. Whether it is family or friends gathering, barbecue can always bring you the most fun, and delicious food is one of the most talked about topics at the party. The key to the delicious food is the firepower and fire control of the barbecue. The more you can precisely control the temperature of the barbecue stove based on the condition of the ingredients, the more delicious food can be baked.

Referring to FIG. 1 , a structure of a conventional gas barbecue stove 100 includes a furnace body 110 , a cover body 112 , a gas valve 116 , a plurality of gas regulating valves 118 , and a plurality of combustions disposed in the furnace body 110 . Device 120. The cover 112 is movably coupled to the top of the furnace body 110 to form a suffocating space 114 with the top of the furnace body 110. The gas valve 116 is connected to a gas line 124 for controlling the circulation and closing of the gas. The gas valve 116 sequentially connects the plurality of gas regulating valves 118 to the plurality of combustion devices 120. Each of the combustion devices 120 is for burning gas. Each of the gas regulating valves 118 allows the user to adjust the amount of firepower. Above the combustion device 120 is provided a grid 122 for placing foodstuffs. When the user uses the gas barbecue stove 100, the firepower must be adjusted at any time depending on the condition of the food. When the cover 112 is open, the user can directly look at it. In the condition of the ingredients, the firepower is relatively adjusted. However, when the foodstuff must be simmered, the lid 112 must be smashed to allow the food to be cooked more quickly. At this time, since the user cannot see the condition of the foodstuff, it is difficult to grasp the temperature of the stuffing space 114. The size of the firepower can only be adjusted depending on the user's own experience to maintain the temperature of the suffocating space 114. In this case, the ingredients are often undercooked or burnt due to lack of user experience or temporary negligence. Therefore, the conventional gas barbecue stove 100 is still inconvenient in use.

In view of this, the main object of the present invention is to provide a gas barbecue stove having a constant temperature effect and a control method thereof, which can maintain the temperature of the smoldering space of the gas barbecue stove when the food is suffocated.

In order to achieve the above object, the gas barbecue stove with constant temperature effect provided by the present invention is connected to a gas pipeline, and comprises a furnace body, a cover body, a gas valve, at least one combustion device and a thermostat. Wherein, the cover body forms a stuffing space with the furnace body; the gas valve is connected to the gas pipeline; the at least one combustion device is disposed in the furnace body for burning gas; the thermostat device comprises a flow regulator a temperature sensing element and a controller. The flow regulator has a body and a solenoid valve; the body has an inlet end, an outlet end, a first gas flow path and a second gas flow path, wherein the inlet end communicates with the gas valve, the outlet The end is connected to the at least one combustion device; the first gas flow channel and the second gas flow channel are respectively connected to the inlet end and the outlet end; the electromagnetic valve is disposed at the The temperature sensing component is configured to sense a temperature of the smoldering space and output a corresponding electrical signal; the controller is electrically connected to the temperature sensing The component is configured to receive the electrical signal, and control the electromagnetic valve to open or close the first gas flow channel according to the electrical signal, so that the temperature of the smoldering space is maintained within a constant temperature range.

The invention further provides a constant temperature control method for a gas barbecue stove, the gas barbecue stove has a controller and a flow regulator, wherein the controller has an input unit for the user to set a smoldering space of the gas barbecue stove. a constant temperature, and the controller automatically sets a constant temperature range according to the input constant temperature, the constant temperature range includes an upper limit temperature value and a lower limit temperature value; the flow regulator is controllably outputting a first gas flow rate and a a second gas flow rate; the constant temperature control method comprises the steps of: monitoring an instantaneous temperature of the smoldering space; comparing whether the instantaneous temperature falls within the constant temperature range, if the instantaneous temperature is lower than a lower limit temperature value of the constant temperature range, And controlling the flow regulator to supply the gas to the gas barbecue stove at the first gas flow rate; when the instantaneous temperature exceeds the upper limit temperature value of the constant temperature range, controlling the flow regulator to supply the gas to the gas at the second gas flow rate Barbecue oven; when the instantaneous temperature is between the upper limit temperature value and the lower limit temperature value of the constant temperature range, then control A first flow regulator to the gas flow and the second gas flow is supplied alternately to the gas furnace gas barbecue.

Thereby, through the constant temperature effect gas barbecue furnace and its control method, The temperature of the sultry space can be maintained during the simmering of the ingredients, and the ingredients are not cooked or the temperature is too high to be scorched due to the temperature being too low.

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

2 shows a gas oven 200 having a constant temperature effect according to a preferred embodiment of the present invention, comprising a furnace body 210, a cover 212, a gas valve 216, a plurality of gas regulating valves 218, a plurality of combustion devices 220, and a Thermostat device 32. Wherein: the top of the furnace body 210 has a grid 222 for placing foodstuffs.

The cover 212 is movably coupled to the top of the furnace body 210 for the user to open or pick up the cover 212 for grilling as desired. When the cover 212 is lifted, the cover 212 forms a stuffy space 214 with the top of the furnace body 210.

The gas valve 216 is in communication with the gas line 224 for the user to turn the gas on or off. The gas valve 216 sequentially connects the plurality of gas regulating valves 218 and the plurality of combustion devices 220.

The plurality of gas regulating valves 218 are respectively provided for the user to adjust the gas flow rate delivered to the plurality of combustion devices 220 to control the amount of firepower.

A plurality of combustion devices 220 are located in the furnace body 210 for burning gas.

The thermostat device 32 includes a flow regulator 34, a temperature sensing element exemplified by the thermocouple 40, and a controller 42. among them: The flow regulator 34 has a body 36 and a solenoid valve 38. The body 36 has an inlet end 362, an outlet end 364, a first gas flow path 366 and a second gas flow path 368. The inlet end 362 is connected to the gas valve 216 for gas injection from the gas valve 216; the outlet end 364 sequentially connects the plurality of gas regulating valves 218 and the plurality of combustion devices 220. The first gas flow path 366 and the second gas flow path 368 are respectively connected to the inlet end 362 and the outlet end 364. The solenoid valve 38 is disposed on the body 36 and located on the path of the first gas flow path 366. The solenoid valve 38 is controllably opened or closed to the first gas flow passage 366 to regulate the amount of gas flow output from the outlet end 364. In other words, the flow regulator 34 can controlly output gas of different flow sizes at different times at different times. In the present embodiment, the solenoid valve 38 is a normally open solenoid valve.

The thermocouple 40 is located in the suffocating space 214. The thermocouple 40 is electrically connected to the controller 42 , and the thermocouple 40 senses the temperature of the smoldering space 214 and outputs a corresponding electrical signal to the controller 42 .

The controller 42 is electrically connected to the solenoid valve 38. The controller 42 includes an input unit 44, a memory unit 46 and a signal generating unit 48. The input unit 44 is configured to allow the user to set a constant temperature in the smoldering space 214 according to requirements, and the controller generates a corresponding constant temperature range according to the constant temperature, and the controller automatically adjusts one of the constant temperature ranges. The upper limit temperature value and a lower limit temperature value. The controller 42 controls the solenoid valve 38 according to the temperature of the smoldering space 214 and the upper limit temperature value and the lower limit temperature value of the constant temperature range. The first gas flow path 366 is opened or closed.

The memory unit 46 stores a plurality of different reference temperature values in advance, and has a corresponding first time value and a second time value corresponding to different reference temperature values, and the controller 42 is configured according to a constant temperature set by the user. And extracting, from the memory unit 46, a corresponding reference temperature value, and a first time value and a second time value corresponding to the captured reference temperature value.

The signal generating unit 48 is configured to send an activation signal to the solenoid valve 38 to control the solenoid valve 38 to open or close the first gas flow path 366. In this embodiment, when the start signal is not transmitting, the solenoid valve 38 opens the first gas flow path 366. At this time, the gas flow output from the outlet end 364 of the body 36 of the flow regulator 34 is The sum of the gas flows through the first gas flow path 366 and the second gas flow path 368 is defined as a first gas flow rate. The first gas flow path 366 is blocked by the solenoid valve 38 when the activation signal is transmitted. At this time, the gas flow rate outputted by the flow regulator 34 is the gas flow rate passing through the second gas flow path 368, which is defined as a second gas flow rate. In the above, the first gas flow rate is greater than the second gas flow rate.

When the cover 212 is open, the user can selectively close the thermostat 32 by the input unit 44. At this time, the signal generating unit 48 stops transmitting the start signal. The solenoid valve 38 is in a normally open state, so the gas flow output from the flow regulator 34 is the first gas flow rate. The user can manually adjust the size of the firepower through the gas regulating valve 218 to manually grill the food.

When the user wants to simmer the food, the cover 212 is smashed, and the required constant temperature is set from the input unit 44, and the controller 42 draws the corresponding number from the memory unit 46 according to the constant temperature. A time value and a second time value. Next, the sizzling space 214 is maintained at a constant temperature by the following constant temperature control method (refer to FIG. 3). The thermostatic control method includes the following steps:

A. monitoring the instantaneous temperature of the smoldering space;

In this embodiment, the controller 42 continuously responds to the instantaneous temperature based on the electrical signal generated by the thermocouple 40.

B. Compare whether the instantaneous temperature falls within the constant temperature range, if:

When the instantaneous temperature is lower than the lower limit temperature value of the constant temperature range, the flow regulator 34 is controlled to supply gas to the gas rotisserie 200 at the first gas flow rate. In this embodiment, when the controller 42 determines that the instantaneous temperature is lower than the lower temperature value of the constant temperature range, the signal generating unit 48 of the controller 42 does not send the activation signal to the electromagnetic valve 38 to make the first gas. The flow path 366 is in an open state. At this time, the gas flow outputted by the flow regulator 34 is the first gas flow rate, and the combustion device 220 is warmed by a large fire until the instantaneous temperature falls within the constant temperature range.

When the instantaneous temperature exceeds the upper limit temperature value of the constant temperature range, the flow regulator 34 is controlled to supply gas to the gas rotisserie 200 at the second gas flow rate. In this embodiment, when the controller 42 determines that the instantaneous temperature is higher than the upper limit temperature value, the signal generating unit 48 of the controller 42 sends the start signal to the electromagnetic valve 38, so that the first gas flow path 366 is Disabled. at this time, The gas flow outputted by the flow regulator 34 is the second gas flow rate, and the fire power of the combustion device 220 is reduced until the instantaneous temperature falls within the constant temperature range.

When the instantaneous temperature is between the upper limit temperature value and the lower limit temperature value of the constant temperature range, the flow regulator 34 is controlled to supply the gas to the gas barbecue stove 200 alternately with the first gas flow rate and the second gas flow rate. In this embodiment, when the controller 42 determines that the instantaneous temperature is within the constant temperature range, the signal generating unit 48 of the controller 42 repeatedly transmits the activation signal to control the solenoid valve 38 to be repeatedly turned on and off. The first gas flow path 366, wherein the electromagnetic valve 38 opens the first gas flow path 366 within the first time value, and closes the first gas flow path 366 in the second time value, in other words, controls The flow regulator 34 alternately supplies gas at the first gas flow rate for the first time value, and supplies gas at the second gas flow rate for the second time value.

Thereby, the reference temperature, the first time value and the second time value stored in the memory unit 46 are used as a basis for controlling the flow regulator 34, so that the temperature of the suffocating space 214 is maintained at a constant temperature set by the user. The temperature is within the constant temperature range.

Through the above design, after the user covers the lid 212 of the gas barbecue stove 200, different constant temperature can be set according to different food materials, and the temperature in the stuffing space 214 can be maintained at a constant temperature suitable for roasting of the food. Within the scope. It is effective to prevent the ingredients from being roasted due to the temperature of the suffocating space being too low or being scorched due to too high temperature. It is worth mentioning that the use of solenoid valves to control gas flow has the effect of saving electricity. In addition, in addition to the normally open solenoid valve, it can also be used often The closed type solenoid valve; when the normally closed solenoid valve is used, the first gas flow path 366 is in a closed state when the start signal is not transmitted, and the first gas flow path 366 is in an open state when the start signal is transmitted.

In addition, in addition to the above design, in an embodiment, a gas fire line may be disposed in the gas valve 216, and a flame port of the mother fire pipe is located near the plurality of combustion devices 220, and the flame port is used to generate a mother The fire ignites the gas of the plurality of combustion devices 220. In an embodiment, the controller 42 further includes a display unit for displaying the temperature of the smoldering space 214 or a constant temperature set by a user, and the thermostat device 32 further includes a food temperature sensing component. The controller 42 is electrically connected to measure the temperature of the foodstuff and is displayed through the display unit. In an embodiment, the controller 42 further includes a timing unit for the user to time the smoldering time, and the controller 42 further includes a warning unit to remind the user when the time is up. In practice, the aforementioned mother fire pipeline, display unit, food temperature sensing component, timing unit and warning unit can also be combined with each other according to actual product requirements.

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 methods of the present invention and the scope of the claims are intended to be included within the scope of the invention.

100‧‧‧ gas oven

110‧‧‧ furnace body

112‧‧‧ cover

114‧‧‧Suffocating space

116‧‧‧ gas valve

118‧‧‧ gas control valve

120‧‧‧burning device

122‧‧‧ Grid

124‧‧‧ gas pipeline

200‧‧‧ gas barbecue

210‧‧‧ furnace body

212‧‧‧ Cover

214‧‧‧ boring space

216‧‧ ‧ gas valve

218‧‧ ‧ gas control valve

220‧‧‧ burning device

222‧‧‧ Grid

224‧‧‧ gas pipeline

32‧‧‧ thermostat

34‧‧‧Flow Regulator

36‧‧‧Ontology

362‧‧‧ entrance end

364‧‧‧export end

366‧‧‧First gas flow channel

368‧‧‧Second gas flow channel

38‧‧‧ solenoid valve

40‧‧‧Thermal coupler

42‧‧‧ Controller

44‧‧‧ Input unit

46‧‧‧ memory unit

48‧‧‧Signal generating unit

1 is a schematic view showing the structure of a conventional gas barbecue oven; FIG. 2 is a gas barbecue furnace having a constant temperature effect according to a preferred embodiment of the present invention; and FIG. 3 is a flow chart of a constant temperature control method according to a preferred embodiment of the present invention.

200‧‧‧ gas barbecue

210‧‧‧ furnace body

212‧‧‧ Cover

214‧‧‧ boring space

216‧‧ ‧ gas valve

218‧‧ ‧ gas control valve

220‧‧‧ burning device

222‧‧‧ Grid

224‧‧‧ gas pipeline

32‧‧‧ thermostat

34‧‧‧Flow Regulator

36‧‧‧Ontology

362‧‧‧ entrance end

364‧‧‧export end

366‧‧‧First gas flow channel

368‧‧‧Second gas flow channel

38‧‧‧ solenoid valve

40‧‧‧Thermal coupler

42‧‧‧ Controller

44‧‧‧ Input unit

46‧‧‧ memory unit

48‧‧‧Signal generating unit

Claims (11)

The utility model relates to a gas barbecue stove with constant temperature effect, which is connected with a gas pipeline, comprising: a furnace body; a cover body for forming a stuffy and roasting space with the furnace body; a gas valve connecting the gas pipeline; at least one a combustion device disposed in the furnace body for burning gas; and a thermostatic device comprising: a flow regulator having a body and a solenoid valve; the body having an inlet end, an outlet end, and a first a gas flow passage and a second gas flow passage, wherein the inlet end communicates with the gas valve, the outlet end communicates with the at least one combustion device; and the first gas flow passage and the second gas flow passage are respectively connected to each other The inlet end and the outlet end; the electromagnetic valve is disposed on the body and located on the path of the first gas flow path; a temperature sensing component is configured to sense the temperature of the smoldering space, and output a phase accordingly Corresponding electrical signal; a controller electrically connected to the temperature sensing component for receiving the electrical signal, and controlling the electromagnetic valve according to the electrical signal to maintain the temperature of the smoldering space within a constant temperature range Range An upper temperature limit value and a lower limit temperature; wherein when the controller determines that the boring baking temperature space temperature exceeds the upper limit value, the controller controls the first solenoid valve closes the gas flow path; When the controller determines that the temperature of the smoldering space is lower than the lower limit temperature value, the controller controls the electromagnetic valve to open the first gas flow channel; the controller determines that the temperature of the smoldering space is between the upper limit of the constant temperature range The controller controls the solenoid valve to repeatedly open and close the first gas flow path when the temperature value is between the lower limit temperature value and the lower limit temperature value. The gas barbecue stove having a constant temperature effect according to claim 1, wherein the controller comprises an input unit for the user to set a constant temperature in the smoldering space, and the controller automatically adjusts according to the constant temperature. The upper limit temperature value of the constant temperature range and the lower limit temperature value. The gas barbecue stove having a constant temperature effect according to claim 2, wherein the controller further comprises a memory unit; the memory unit is pre-stored with a plurality of different reference temperature values, and has a corresponding one corresponding to different reference temperature values. a first time value and a second time value, the controller extracts a corresponding reference temperature value from the memory unit according to the constant temperature set by the user, and a first time value corresponding to the reference temperature value a second time value for controlling the solenoid valve to open the first gas flow path within the first time value, and closing the first gas flow path within the second time value. The gas oven having a constant temperature effect according to claim 1 includes at least one gas regulating valve for the user to adjust the gas flow rate to the at least one combustion device. The gas barbecue stove having a constant temperature effect according to claim 1, wherein the gas valve has a mother fire line; a flame port of the mother fire line is located near the at least one combustion device, and the flame port is for generating a mother fire to ignite The gas of the at least one combustion device. A gas oven having a constant temperature effect according to claim 1, wherein the controller comprises a display unit for displaying the temperature of the sweltering space. The gas oven having a constant temperature effect according to claim 1, wherein the thermostat comprises a food temperature sensing element, the controller comprises a display unit, and the food temperature sensing element is electrically connected to the controller for measuring the food. Temperature and displayed through the display unit. The gas oven with a constant temperature effect according to claim 1, wherein the controller comprises a timing unit and a warning unit, wherein the timing unit is configured for the user to time the smoldering time, and the warning unit is reminded when the time is reached. user. The utility model relates to a constant temperature control method for a gas barbecue stove, wherein the gas barbecue stove has a controller and a flow regulator, wherein the controller has an input unit for the user to set the constant temperature of the smoldering space of the gas barbecue stove, and the temperature is The controller automatically sets a constant temperature range according to the input constant temperature, the constant temperature range includes an upper limit temperature value and a lower limit temperature value; the flow regulator is controllably outputting a first gas flow rate and a second gas flow rate, respectively. The constant temperature control method includes the following steps: monitoring the instantaneous temperature of the smoldering space; comparing whether the instantaneous temperature falls within the constant temperature range, and if the instantaneous temperature is lower than the lower limit temperature value of the constant temperature range, controlling the flow rate The regulator supplies the gas to the gas barbecue stove at the first gas flow rate; when the instantaneous temperature exceeds the upper temperature limit value of the constant temperature range, controlling the flow regulator to supply the gas to the gas barbecue furnace at the second gas flow rate; The instantaneous temperature is between the upper limit temperature value and the lower limit temperature value of the constant temperature range And controlling the flow regulator to supply the gas to the gas barbecue stove alternately with the first gas flow rate and the second gas flow rate; wherein the flow regulator has a body and a solenoid valve, the body has an inlet end An outlet end, a first gas flow path and a second gas flow path; the first gas flow path and the second gas flow path respectively communicate with the inlet end and the outlet end; the inlet end is provided Injecting gas, the outlet end is for outputting gas; the electromagnetic valve is disposed on the body and located on the path of the first gas flow path, and the electromagnetic valve is controlled by the controller to open or close the first gas flow path. The method for controlling the constant temperature control of a gas barbecue stove according to claim 9, wherein when the electromagnetic valve opens the first gas flow passage, the sum of the gas passing through the first gas flow passage and the second gas flow passage is the first gas flow rate When the solenoid valve closes the first gas flow passage, the gas flow rate through the second gas flow passage is the second gas flow rate. The method for controlling a constant temperature control of a gas barbecue stove according to claim 10, wherein the controller has a memory unit, the memory unit pre-stores a plurality of different reference temperature values, and has a corresponding first one corresponding to different reference temperature values. The time value and a second time value, the controller extracts a corresponding reference temperature value from the memory unit according to the constant temperature set by the user, and the first time value corresponding to the reference temperature value and the second time value a time value; if the instantaneous temperature is between the upper limit temperature value and the lower limit temperature value of the constant temperature range, controlling the flow regulator to alternately supply gas at the first gas flow rate within the first time value, in the first Gas is supplied at the second gas flow rate within the second time value.