Road petroleum asphalt heating and smoke exhausting integrated laboratory device
By designing the integrated laboratory device for road petroleum asphalt heating and smoking, the problems of insufficient equipment, uneven heating and harmful gas emissions are solved, and the heating efficiency and environmental protection performance are improved, ensuring the safety and convenience of the laboratory are ensured. .
Patent Information
- Application Number
- CN202323650055.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-30
- Publication Date
- 2025-01-10
- Estimated Expiration
- 2033-12-30
AI Technical Summary
Traditional road petroleum asphalt heating methods have problems such as insufficient equipment, uneven heating, difficult temperature control and harmful gas emissions, especially in construction site laboratories to pose a threat to the health of testers.
A integrated laboratory device for road petroleum asphalt heating smoking is designed, including two heating chambers and a smoking system. Through the cooperation of air supply assembly and smoking assembly, heating uniformity and centralized collection and emission of flue gas are achieved, simplifying the laboratory Ventilation system requirements.
It improves heating efficiency and uniformity, simplifies the requirements of the laboratory ventilation system, enhances environmental protection performance and convenience, and ensures the health and safety of the testers.
Smart Images

Figure CN222337086U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of road petroleum asphalt heating experimental devices, in particular to a road petroleum asphalt heating and smoking integrated experimental laboratory device. Background Art
[0002] Road petroleum asphalt is one of the most widely used materials in highway construction. Due to different technical requirements for its use, different types of asphalt materials such as base asphalt, SBS modified asphalt, emulsified asphalt, liquid petroleum asphalt, etc. are currently used in road asphalt pavement paving, slurry seal, micro-surfacing, cold patching material, penetration oil, tack oil and other fields. Since road petroleum asphalt is a material that is particularly sensitive to temperature, the heating requirements for asphalt materials vary according to different application fields during use.
[0003] The traditional way of heating road petroleum asphalt adopts the mode of electric oven heating and electric furnace heating. The main problems are that one type of asphalt material can only be placed in one electric oven for heating. If the types of asphalt materials are different and the heating requirements are different (different temperatures and times), multiple electric ovens are required for turnover, and there is often a shortage of electric ovens in the laboratory; second, although the electric furnace heating is fast and the equipment is sufficient, it is heated by open flames, the heating is uneven, and the temperature is difficult to control. If liquid petroleum asphalt is heated, it will cause fires caused by improper temperature control; third, during the heating process of the electric oven, the harmful gases generated by the volatilization of asphalt cannot be discharged. The ventilation systems of most laboratories, especially those on-site laboratories, do not meet the requirements, which affects the health of the test personnel. Therefore, it is urgent to design a new integrated laboratory device for heating and smoking road petroleum asphalt to solve the above problems. Utility Model Content
[0004] The utility model provides a road petroleum asphalt heating and smoking integrated test laboratory device to solve the technical problems raised in the above background technology.
[0005] The utility model provides an integrated test laboratory device for heating and smoking of petroleum asphalt on a road, which comprises a first heating chamber for heating asphalt, a first heating component for maintaining the temperature of the first heating chamber, an air supply component for supplying air to the first heating chamber, a second heating chamber for heating asphalt, a second heating component for maintaining the temperature of the second heating chamber, an extraction component for extracting the gas in the second heating chamber to the external environment, and a smoke transfer pipe, wherein a first asphalt placement net is installed in the first heating chamber, the first heating component is installed in the first heating chamber, the air supply component is installed at the lower side of the first heating chamber, and the output end of the air supply component is connected to the first heating chamber, the second heating chamber is installed at one side of the first heating chamber, and a second asphalt placement net is installed in the second heating chamber, the second heating component is installed in the second heating chamber, the extraction component is installed at the lower side of the second heating chamber, one end of the smoke transfer pipe is connected to the upper end of the first heating chamber, and the other end of the smoke transfer pipe is connected to the upper end of the second heating chamber.
[0006] Optionally, a first sealing side cover is rotatably connected to one side of the first heating chamber, and a second sealing side cover is rotatably connected to one side of the second heating chamber.
[0007] Optionally, the first heating assembly includes at least one first heating tube and at least one first heating joint, the first heating tube is installed in the first heating chamber, one end of the first heating joint is connected to the first heating tube, and the other end of the first heating joint extends out of the first heating chamber, and the number of the first heating tubes is equal to the number of the first heating joints.
[0008] Optionally, the air supply assembly includes an air intake box, a gas adapter, a gas inlet part, a gas generating part and an air supply drive motor for driving the gas generating part to rotate, the air intake box is installed on the lower side of the first heating chamber, the gas adapter part is installed on a side of the air intake box away from the gas adapter part, the gas inlet part is installed on a side of the gas adapter part away from the air intake box, the gas generating part is rotatably installed in the gas inlet part, the air supply drive motor is installed on the side wall of the gas inlet part, and the output end of the air supply drive motor is connected to the gas generating part.
[0009] Optionally, the gas generating part includes a gas generating baffle, a gas generating limit ring and a plurality of gas generating blades, the gas generating baffle is connected to the output end of the air supply drive motor, the gas generating limit ring is installed on one side of the gas generating baffle, and the plurality of gas generating blades are installed at equal angles between the gas generating baffle and the gas generating limit ring.
[0010] Optionally, a mounting portion for improving installation convenience of the gas inlet portion is fixedly connected to the side wall of the gas inlet portion.
[0011] Optionally, the second heating assembly includes at least one second heating tube and at least one second heating joint, the second heating tube is installed in the second heating chamber, one end of the second heating joint is connected to the second heating tube, the other end of the second heating joint extends out of the second heating chamber, and the number of the second heating tubes is equal to the number of the second heating joints.
[0012] Optionally, the smoke extraction assembly includes an exhaust smoke duct, an exhaust smoke outlet and an air exhaust fan, the exhaust smoke duct is installed on the lower side of the second heating chamber, the exhaust smoke outlet is connected to an end of the exhaust smoke duct away from the second heating chamber, and the air exhaust fan is installed on the outer wall of the exhaust smoke outlet.
[0013] Optionally, a stabilizing limit plate for improving the installation stability of the flue gas transfer pipe is provided at the center of the flue gas transfer pipe.
[0014] Optionally, a first temperature detection sensor for detecting the temperature inside the first heating chamber is disposed on the side wall of the first heating chamber, and a second temperature detection sensor for detecting the temperature inside the second heating chamber is disposed on the side wall of the second heating chamber.
[0015] Optionally, the number of the heating chamber devices is not limited to the first heating chamber and the second heating chamber, and can be increased according to the type of asphalt material in the test laboratory based on the same principle.
[0016] The utility model provides an integrated test laboratory device for heating and extracting road petroleum asphalt, which improves the heating uniformity of road petroleum asphalt through the mutual cooperation of various structures. At the same time, heating chambers can be selected separately according to the heating temperature requirements of different types of road petroleum asphalt to improve the heating efficiency. The smoke generated during the heating of asphalt can also be collected and discharged in a centralized manner, which simplifies the requirements for the laboratory ventilation system, thereby improving the convenience and environmental protection performance of the utility model. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0018] Figure 1 This is a structural schematic diagram of the first-view of the integrated road petroleum asphalt heating and smoke extraction test laboratory device provided by the utility model;
[0019] Figure 2 It is a structural schematic diagram of the second viewing angle of the integrated road petroleum asphalt heating and smoking test laboratory device provided by the utility model;
[0020] Figure 3 It is a structural schematic diagram of the third perspective of the road petroleum asphalt heating and smoking integrated test laboratory device provided by the utility model;
[0021] Figure 4 The utility model discloses a schematic diagram of the structure of the gas generating part of the integrated testing laboratory device for heating and smoking road petroleum asphalt. DETAILED DESCRIPTION
[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. It is understandable that the specific embodiments described herein are only used to explain the utility model, rather than to limit the utility model. It should also be noted that, for ease of description, only the parts related to the utility model rather than all structures are shown in the drawings. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.
[0023] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.
[0024] See also Figures 1 to 4 The utility model of the road petroleum asphalt heating and smoking integrated test laboratory device comprises a first heating chamber 100 for heating asphalt, a first heating component for maintaining the temperature of the first heating chamber 100, an air supply component for supplying air into the first heating chamber 100, a second heating chamber 400 for heating asphalt, a second heating component for maintaining the temperature of the second heating chamber 400, a smoking component for extracting the gas in the second heating chamber 400 to the external environment, and a smoke transfer pipeline 700;
[0025] A first asphalt placement net 110 is installed in the first heating chamber 100, the first heating component is installed in the first heating chamber 100, the air supply component is installed at the lower side of the first heating chamber 100, and the output end of the air supply component is connected to the first heating chamber 100, the second heating chamber 400 is installed at one side of the first heating chamber 100, and a second asphalt placement net 410 is installed in the second heating chamber 400, the second heating component is installed in the second heating chamber 400, the smoke extraction component is installed at the lower side of the second heating chamber 400, one end of the smoke transfer pipe 700 is connected to the upper end of the first heating chamber 100, and the other end of the smoke transfer pipe 700 is connected to the upper end of the second heating chamber 400;
[0026] The first heating chamber 100 and the second heating chamber 400 can simultaneously heat different asphalt materials to be heated from the outside, thereby improving the heating efficiency of the road petroleum asphalt heating and smoking integrated test laboratory device of the utility model for different asphalt materials;
[0027] Specifically, when the user needs to use the road petroleum asphalt heating and smoking integrated test laboratory device of the utility model to heat different asphalt materials, the user places the external asphalt to be heated on the first asphalt placement net 110 and the second asphalt placement net 410 respectively, and then, after the first heating chamber 100 and the second heating chamber 400 are in a sealed state, the first heating component heats the first heating chamber 100, and the second heating component heats the second heating chamber 400, so that the first heating chamber 100 and the second heating chamber 400 can heat different asphalt materials at the same time;
[0028] More specifically, when the first heating component and the second heating component are working to heat the asphalt, the asphalt will generate smoke. At this time, the air supply component enters the working state, so that the smoke generated in the first heating chamber 100 is blown into the smoke transfer pipe 700 and enters the second heating chamber 400. Then, the smoke extraction component enters the working state, and the smoke extraction component extracts the smoke generated by the second heating component heating the asphalt and the smoke entering the second heating chamber 400 through the smoke transfer pipe 700 into the external waste gas recovery device, thereby avoiding the smoke from being directly discharged into the laboratory environment, thereby ensuring the convenience and environmental protection of the work of the utility model;
[0029] Furthermore, micropores are provided on the first asphalt placing net 110 and the second asphalt placing net 410, which can ensure that smoke passes through while supporting the asphalt material;
[0030] Furthermore, the road petroleum asphalt heating and smoking integrated test chamber device of the utility model makes the air flow in the first heating chamber 100, the smoke transfer duct 700 and the second heating chamber 400 flow faster through the mutual cooperation of the air supply component and the smoke extraction component, thereby improving the smoke extraction efficiency of the road petroleum asphalt heating and smoking integrated test chamber device of the utility model;
[0031] Furthermore, when using the integrated road petroleum asphalt heating and smoking test laboratory device of the present invention, the user can control the temperature of the first heating component and the second heating component according to specific needs, so that the temperatures in the first heating chamber 100 and the second heating chamber 400 can be different, so that when heating different asphalt materials, the heating state of the asphalt in the first heating chamber 100 and the heating state of the asphalt in the second heating chamber 400 can be kept different, so that when the user applies the integrated road petroleum asphalt heating and smoking test laboratory device of the present invention, different heating states can be used to heat different asphalt materials, thereby improving the application scenarios.
[0032] In this embodiment, a first sealing side cover 120 is rotatably connected to one side of the first heating chamber 100 , and a second sealing side cover 420 is rotatably connected to one side of the second heating chamber 400 .
[0033] When the asphalt needs to be heated or the heated asphalt needs to be taken out from the first heating chamber 100, the user controls the first sealed side cover 120 to open, thereby improving the convenience of the user in storing and taking the asphalt;
[0034] When the asphalt needs to be heated or the heated asphalt needs to be taken out from the second heating chamber 400, the user controls the second sealed side cover 420 to open, thereby improving the convenience of the user in storing and taking out the asphalt.
[0035] In this embodiment, the first heating assembly includes at least one first heating tube 210 and at least one first heating joint 220, the first heating tube 210 is installed in the first heating chamber 100, one end of the first heating joint 220 is connected to the first heating tube 210, and the other end of the first heating joint 220 extends out of the first heating chamber 100, and the number of the first heating tubes 210 is equal to the number of the first heating joints 220.
[0036] Among them, the first heating joint 220 extends out of one side of the first heating chamber 100 and is connected to an external power supply device, so that the first heating joint 220 supplies power to the first heating tube 210, and then the first heating tube 210 generates heat, thereby completing the heating action of the asphalt. At the same time, the first heating tube 210 can be set to a spiral or curved shape to improve the heating effect of the first heating tube 210 on the first heating chamber 100.
[0037] In this embodiment, the air supply assembly includes an air intake box 310, a gas adapter part 320, a gas inlet part 330, a gas generating part 340 and an air supply drive motor 350 for driving the gas generating part 340 to rotate, the air intake box 310 is installed on the lower side of the first heating chamber 100, the gas adapter part 320 is installed on the side of the air intake box 310 away from the gas adapter part 320, the gas inlet part 330 is installed on the side of the gas adapter part 320 away from the air intake box 310, the gas generating part 340 is rotatably installed in the gas inlet part 330, the air supply drive motor 350 is installed on the side wall of the gas inlet part 330, and the output end of the air supply drive motor 350 is connected to the gas generating part 340.
[0038] Among them, when it is necessary to discharge the smoke generated by heating asphalt in the first heating chamber 100 to the smoke transfer pipe 700, the air supply drive motor 350 enters the working state, so that the air supply drive motor 350 drives the gas inlet part 330 to rotate, and the gas inlet part 330 generates airflow and passes through the gas adapter part 320 to enter the air intake box 310, and then, the airflow passes through the air intake box 310 to enter the first heating chamber 100, and then, the smoke in the first heating chamber 100 is blown into the smoke transfer pipe 700.
[0039] In this embodiment, the gas generating part 340 includes a gas generating baffle 341, a gas generating limit ring 342 and a plurality of gas generating blades 343. The gas generating baffle 341 is connected to the output end of the air supply drive motor 350. The gas generating limit ring 342 is installed on one side of the gas generating baffle 341. The plurality of gas generating blades 343 are installed at equal angles between the gas generating baffle 341 and the gas generating limit ring 342.
[0040] Among them, the center of the gas generating baffle 341 is connected to the air supply driving motor 350, and then, when the air supply driving motor 350 drives the gas generating baffle 341 to rotate, the gas generating baffle 341 drives the multiple gas generating blades 343 to rotate. Since the gas generating blades 343 are in an arc-shaped structure, the gas generating blades 343 generate airflow when rotating and send it to the first heating chamber 100. At the same time, the gas generating limit ring 342 and the gas generating baffle 341 cooperate with each other, thereby playing a role of fixing and supporting the multiple gas generating blades 343.
[0041] In this embodiment, a mounting portion 331 is fixedly connected to the side wall of the gas introduction portion 330 for improving the convenience of mounting the gas introduction portion 330 .
[0042] The mounting portion 331 may be connected to an external mounting surface, thereby improving the stability of the utility model during use.
[0043] In this embodiment, the second heating assembly includes at least one second heating tube 510 and at least one second heating joint 520, the second heating tube 510 is installed in the second heating chamber 400, one end of the second heating joint 520 is connected to the second heating tube 510, and the other end of the second heating joint 520 extends out of the second heating chamber 400, and the number of the second heating tubes 510 is equal to the number of the second heating joints 520.
[0044] Among them, the second heating joint 520 extends out of one side of the second heating chamber 400 and is connected to an external power supply device, so that the second heating joint 520 supplies power to the second heating tube 510, and then the second heating tube 510 generates heat, thereby completing the heating action of the asphalt. At the same time, the second heating tube 510 can be set to a spiral or curved shape to improve the heating effect of the second heating tube 510 on the second heating chamber 400.
[0045] In this embodiment, the smoke extraction component includes an exhaust smoke duct 610, an exhaust smoke outlet portion 620 and an air exhaust fan 630. The exhaust smoke duct 610 is installed on the lower side of the second heating chamber 400. The exhaust smoke outlet portion 620 is connected to the end of the exhaust smoke duct 610 away from the second heating chamber 400. The air exhaust fan 630 is installed on the outer wall of the exhaust smoke outlet portion 620.
[0046] The smoke extraction component extracts the smoke entering the second heating chamber 400 and the smoke generated in the second heating chamber 400 to an external recovery and processing device to prevent the smoke from being discharged into the external environment;
[0047] Specifically, when the smoke extraction component needs to work, first, the vacuum fan 630 enters the working state, and the vacuum fan 630 generates suction, so that the smoke in the second heating chamber 400 passes through the exhaust smoke duct 610 and the exhaust smoke outlet section 620 in turn, and enters the external waste gas recovery and treatment device connected to the exhaust smoke outlet section 620.
[0048] In this embodiment, a stabilizing limit plate 710 is disposed at the center of the flue gas transfer duct 700 to improve the installation stability of the flue gas transfer duct 700 .
[0049] The user may install the stabilizing limit plate 710 into the external mounting surface by means of external screws, etc., so as to improve the stability of the smoke transfer duct 700 during use.
[0050] In this embodiment, a first temperature detection sensor 130 for detecting the temperature in the first heating chamber 100 is disposed on the side wall of the first heating chamber 100 , and a second temperature detection sensor 430 for detecting the temperature in the second heating chamber 400 is disposed on the side wall of the second heating chamber 400 .
[0051] Among them, when the first heating chamber 100 and the second heating chamber 400 are heating the asphalt, the first temperature detection sensor 130 can detect the temperature inside the first heating chamber 100 to ensure that the first heating chamber 100 can heat the asphalt at an appropriate temperature, and the second temperature detection sensor 430 can detect the temperature inside the second heating chamber 400 to ensure that the second heating chamber 400 can heat the asphalt at an appropriate temperature.
[0052] The road petroleum asphalt heating and smoking integrated test laboratory device comprises a first heating chamber 100 for heating asphalt, a first heating component for maintaining the temperature of the first heating chamber 100, an air supply component for supplying air to the first heating chamber 100, a second heating chamber 400 for heating asphalt, a second heating component for maintaining the temperature of the second heating chamber 400, a smoking component for extracting the gas in the second heating chamber 400 to the external environment, and a smoke transfer pipeline 700. A first asphalt placement net 110 is installed in the first heating chamber 100, and the first heating component is installed in the first heating chamber 100. 0, the air supply assembly is installed at the lower side of the first heating chamber 100, and the output end of the air supply assembly is connected to the first heating chamber 100, the second heating chamber 400 is installed at one side of the first heating chamber 100, and a second asphalt placing net 410 is installed in the second heating chamber 400, the second heating assembly is installed in the second heating chamber 400, the smoke extraction assembly is installed at the lower side of the second heating chamber 400, one end of the smoke transfer pipe 700 is connected to the upper end of the first heating chamber 100, and the other end of the smoke transfer pipe 700 is connected to the upper end of the second heating chamber 400. The utility model improves the heating uniformity of road petroleum asphalt through the mutual cooperation of various structures, and at the same time, the heating chamber can be selected separately according to the heating temperature requirements of different types of road petroleum asphalt to improve the heating efficiency, and the smoke generated in the process of heating asphalt can be collected and discharged in a centralized manner, which simplifies the requirements for the laboratory ventilation system, thereby improving the convenience and environmental protection performance of the utility model.
[0053] The above description is only an implementation method of the present utility model, and does not limit the patent scope of the present utility model. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present utility model, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present utility model.
Claims
1. A road petroleum asphalt heating and smoking integrated laboratory device, characterized in that: include: a first heating chamber for heating asphalt, wherein a first asphalt placing net is installed in the first heating chamber; a first heating assembly for maintaining the temperature of the first heating chamber, the first heating assembly being installed in the first heating chamber; An air supply component for supplying air into the first heating chamber, the air supply component being installed at the lower side of the first heating chamber, and an output end of the air supply component being connected to the first heating chamber; a second heating chamber for heating asphalt, wherein the second heating chamber is installed on one side of the first heating chamber, and a second asphalt placing net is installed in the second heating chamber; a second heating assembly for maintaining the temperature of the second heating chamber, the second heating assembly being installed in the second heating chamber; A smoke extraction component for extracting the gas in the second heating chamber to the external environment, wherein the smoke extraction component is installed at the lower side of the second heating chamber; A flue gas transfer pipe, one end of which is connected to the upper end of the first heating chamber, and the other end of which is connected to the upper end of the second heating chamber.
2. The road petroleum asphalt heating and smoking integrated laboratory device according to claim 1 is characterized in that: A first sealing side cover is rotatably connected to one side of the first heating chamber, and a second sealing side cover is rotatably connected to one side of the second heating chamber.
3. The road petroleum asphalt heating and smoking integrated laboratory device according to claim 1 is characterized in that: The first heating assembly includes at least one first heating tube and at least one first heating joint, the first heating tube is installed in the first heating chamber, one end of the first heating joint is connected to the first heating tube, and the other end of the first heating joint extends out of the first heating chamber, and the number of the first heating tubes is equal to the number of the first heating joints.
4. The road petroleum asphalt heating and smoking integrated laboratory device according to claim 1 is characterized in that: The air supply assembly includes an air intake box, a gas adapter, a gas inlet part, a gas generating part and an air supply drive motor for driving the gas generating part to rotate, the air intake box is installed on the lower side of the first heating chamber, the gas adapter is installed on a side of the air intake box away from the gas adapter, the gas inlet part is installed on a side of the gas adapter part away from the air intake box, the gas generating part is rotatably installed in the gas inlet part, the air supply drive motor is installed on the side wall of the gas inlet part, and the output end of the air supply drive motor is connected to the gas generating part.
5. The road petroleum asphalt heating and smoking integrated test laboratory device according to claim 4 is characterized in that: The gas generating part includes a gas generating baffle, a gas generating limit ring and a plurality of gas generating blades. The gas generating baffle is connected to the output end of the air supply drive motor. The gas generating limit ring is installed on one side of the gas generating baffle. The plurality of gas generating blades are installed at equal angles between the gas generating baffle and the gas generating limit ring.
6. The road petroleum asphalt heating and smoking integrated laboratory device according to claim 4 is characterized in that: A mounting portion for improving the convenience of mounting the gas introduction portion is fixedly connected to the side wall of the gas introduction portion.
7. The road petroleum asphalt heating and smoking integrated test laboratory device according to claim 1 is characterized in that: The second heating assembly includes at least one second heating tube and at least one second heating joint. The second heating tube is installed in the second heating chamber. One end of the second heating joint is connected to the second heating tube, and the other end of the second heating joint extends out of the second heating chamber. The number of the second heating tubes is equal to the number of the second heating joints.
8. The road petroleum asphalt heating and smoking integrated laboratory device according to claim 1 is characterized in that: The smoke extraction assembly includes an exhaust smoke duct, an exhaust smoke outlet and an air exhaust fan. The exhaust smoke duct is installed at the lower side of the second heating chamber. The exhaust smoke outlet is connected to an end of the exhaust smoke duct away from the second heating chamber. The air exhaust fan is installed on the outer wall of the exhaust smoke outlet.
9. The road petroleum asphalt heating and smoking integrated test laboratory device according to claim 1, characterized in that: A stabilizing limit plate for improving the installation stability of the flue gas transfer pipe is arranged at the center of the flue gas transfer pipe.
10. The road petroleum asphalt heating and smoking integrated test laboratory device according to claim 1, characterized in that: A first temperature detection sensor for detecting the temperature inside the first heating chamber is disposed on the side wall of the first heating chamber, and a second temperature detection sensor for detecting the temperature inside the second heating chamber is disposed on the side wall of the second heating chamber.