Kiln

Abstract

A kiln including a stove, a combustion device, a thermometer, a flow rate regulation device, and a control device wherein the stove includes a cavity and an entry. The combustion device is disposed in the stove and includes at least one burner and an infrared ray generation assembly. The thermometer is disposed in the cavity to detect a temperature inside of the cavity. The flow rate regulation device communicates with the at least one burner and is controlled to adjust a gas flow output to the at least one burner. The control device controls the output gas flow via the flow rate regulation device based on a setting temperature and the temperature detected by the thermometer so as to keep the temperature in the cavity at a constant temperature whereby it is conducive to obtaining a good heating efficiency and a constant-temperature heating.

What is claimed is: 
     
         1 . A kiln, comprising:
 a stove, including a cavity and an entry;   a combustion device disposed in the stove and including at least one burner and an infrared ray generation assembly, wherein the at least one burner includes a flame outlet, and the at least one burner is adapted to burn gas to generate flames through the flame outlet; the infrared ray generation assembly is corresponding to the flame outlet and is heated by the flames generated by the at least one burner to generate infrared ray;   a thermometer disposed in the cavity to detect a temperature inside of the cavity;   a flow rate regulation device which communicates with the at least one burner and is controlled to adjust a gas flow output to the at least one burner; and   a control device, electrically connected to the thermometer and the flow rate regulation device, wherein the control device controls the output gas flow via the flow rate regulation device based on a setting temperature and the temperature detected by the thermometer so as to keep the temperature in the cavity at a constant temperature.   
     
     
         2 . The kiln of  claim 1 , wherein the combustion device would generate infrared rays between a wavelength range of 4 to 8 μm when the gas flow output from the flow rate regulation device is above a predetermined flow rate; the control device would control the flow rate regulation device to make the gas flow be equal to or higher than the predetermined flow rate when the temperature detected by the thermometer is between the constant temperature range. 
     
     
         3 . The kiln of  claim 2 , wherein the flow rate regulation device could be controlled to output a maximum gas flow rate; the predetermined flow rate is preferably equal to or higher than one-third of the maximum gas flow rate. 
     
     
         4 . The kiln of  claim 2 , wherein the combustion device includes a plurality of burners, and the flame outlets of each of the burners are corresponding to different positions of the infrared ray generation assembly respectively; the flow rate regulation device includes a plurality of gas switch valves, which are electrically connected to the control device; the plurality of gas switch valves communicate with the burners respectively, and could be controlled by the control device to close or open respectively, thereby to adjust the gas flow output to the burners; when one of the gas switch valves is turned on, the gas flow output from the flow rate regulation device is the predetermined flow rate; and the control device would control at least one of the gas switch valves to open when the temperature detected by the thermometer is between the constant temperature range. 
     
     
         5 . The kiln of  claim 4 , wherein the control device would control the gas switch valves to open by turns when the temperature detected by the thermometer is between the constant temperature range. 
     
     
         6 . The kiln of  claim 1 , further comprising an infrared ray detector and a display unit, wherein the infrared ray detector is disposed within the cavity and adapted to detect a wavelength of the infrared ray; the control device is electrically connected to the infrared ray detector and the display unit; the control device would control the display unit to display a prompt message when the wavelength of the infrared ray detected by infrared ray detector is between the predetermined wavelength range. 
     
     
         7 . The kiln of  claim 6 , wherein the predetermined wavelength range is between 4 and 8 μm. 
     
     
         8 . The kiln of  claim 1 , further comprising an exhaust channel communicating with the cavity and a carbon monoxide detector which is adapted to detect a concentration of carbon monoxide in an air flow passing through the exhaust channel; the control device is electrically connected to the carbon monoxide detector and would control the flow rate regulation device to shut the gas flow when the concentration of the carbon monoxide detected by the carbon monoxide detector is higher than a predetermined value. 
     
     
         9 . The kiln of  claim 1 , further comprising a flame detector and a display unit; wherein the cavity includes a front section, a middle section, and a rear section; the front section communicates with the entry, and the rear section is away from the entry; the flame detector is disposed in the middle section and located higher than the infrared ray generation assembly; the control device is electrically connected to the flame detector and the display unit; the control device would control the display unit to display a prompt message when a flame is detected by the flame detector. 
     
     
         10 . The kiln of  claim 1 , wherein the cavity includes a front section, a middle section, and a rear section; the front section communicates with the entry, and the rear section is away from the entry; the combustion device is disposed in the rear section, and the thermometer is disposed in the middle section or the front section.