Cylindrical direct-fired fan heater

Abstract

The utility model discloses a cylindrical direct-fired fan heater which comprises a cylinder body, an electric cabinet arranged on the cylinder body, and a fan assembly, a wind pressure switch, a temperature detector and a combustion assembly which are arranged in the cylinder body and are respectively connected with the electric cabinet, the fan assembly is arranged on one side of the barrel and close to the air inlet of the barrel, the air pressure switch is located between the fan assembly and the combustion assembly, and the temperature detector is close to the combustion assembly. The burner is large in burning space and realizes streaming burning, so that burning is sufficient, no CO (carbon monoxide) is generated basically, and the burner is simple in structure, is only structurally composed of a barrel, is very simple to clean and maintain, and effectively avoids repeated disassembly and the like. Due to the fact that the combustion space is large, the power can be made to be large and can reach 130 KW or above, high-power output can be achieved without linear increase of the size, and the installation occupied area is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of air heaters, in particular to a cylindrical direct-fired air heater. Background Art

[0002] At present, most direct-fired heaters on the market use a box-type heating structure. The main feature of this structure is that the heating power of a single unit is relatively small, generally below 70KW. The box-type heater has a very small combustion space and a short combustion time. Some fuels cannot be fully burned, and are often accompanied by the production of emissions of CO (carbon monoxide). In severe cases, more emissions will be produced. At the same time, the box-type heater is made of square sheet metal all around. Especially in a humid and dusty environment, it is particularly troublesome to maintain, and it needs to be repeatedly disassembled and installed, which can easily cause damage to the equipment function. Summary of the invention

[0003] In view of the problems existing in the prior art, the purpose of the utility model is to provide a cylindrical direct-fired heater.

[0004] To solve the above problems, the utility model adopts the following technical solutions.

[0005] A cylindrical direct-fired heater comprises a cylinder, an electric control box arranged on the cylinder, and a fan assembly, a wind pressure switch, a temperature detector and a combustion assembly arranged inside the cylinder and respectively connected to the electric control box. The fan assembly is arranged on one side of the cylinder and close to the air inlet of the cylinder, the wind pressure switch is located between the fan assembly and the combustion assembly, and the temperature detector is close to the combustion assembly.

[0006] As a further improvement of the utility model, the fan assembly includes an impeller and a motor driving the impeller to rotate, and the impeller is located between the air inlet and the motor.

[0007] As a further improvement of the utility model, the combustion assembly includes a combustion chamber and a nozzle, an ignition needle and a sensing needle arranged in the combustion chamber. The nozzle is connected to a gas pipeline, and a gas valve is arranged on the gas pipeline.

[0008] As a further improvement of the utility model, a swirl plate for guiding the entry of wind is arranged on the combustion chamber.

[0009] As a further improvement of the present invention, an air outlet is arranged on the other side of the cylinder away from the air inlet, and the air outlet is arranged as a constricted opening.

[0010] As a further improvement of the utility model, an inspection door for opening the cylinder to inspect the interior is provided on the cylinder.

[0011] As a further improvement of the utility model, a support seat is provided on the cylinder.

[0012] As a further improvement of the utility model, a lifting lug is arranged on the cylinder.

[0013] Beneficial effects of the utility model

[0014] Compared with the prior art, the advantages of the present invention are:

[0015] The utility model has a large combustion space and circumferential combustion, so the combustion is sufficient and basically no CO (carbon monoxide) is produced. The structure is simple, and the structure is only composed of a cylinder, so cleaning and maintenance are very simple, and repeated disassembly is effectively avoided. Since the combustion space is relatively large, the power can be made very large, up to 130KW or more, and the size does not need to be linearly increased to achieve high power output, reducing the installation area. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model.

[0017] Figure 2 It is a structural schematic diagram of the utility model from another perspective.

[0018] Figure 3 It is a schematic diagram of the internal structure of the utility model.

[0019] Figure 4 This is the control principle diagram of the utility model.

[0020] Figure 5 It is a schematic diagram of the wind direction principle of the utility model. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model; it is obvious that the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the utility model without making creative work are within the scope of protection of the utility model.

[0022] See also Figures 1 to 5 A cylindrical direct-fired heater comprises a cylinder 1, an electric control box 2 arranged on the cylinder 1, a fan assembly, a wind pressure switch 3, a temperature detector 4 and a combustion assembly arranged inside the cylinder 1 and respectively connected to the electric control box 2. The fan assembly is arranged on one side of the cylinder 1 and close to the air inlet 11 of the cylinder 1, the wind pressure switch 3 is located between the fan assembly and the combustion assembly, and the temperature detector 4 is close to the combustion assembly.

[0023] Specifically, the combustion assembly includes a combustion chamber 56 and a nozzle 51 , an ignition needle 52 and a sensing needle 53 arranged in the combustion chamber 56 . The nozzle 51 is connected to a gas pipeline 54 , and a gas valve 55 is arranged on the gas pipeline 54 .

[0024] The principle is as follows: the electric control box 2 inputs a start signal to the fan assembly according to the temperature detection of the temperature detector 4. After the fan assembly is started, the wind pressure switch 3 detects the signal and transmits it to the electric control box 2. The electric control box 2 enters the ignition program and controls the ignition needle 52 to ignite. The gas valve 55 is opened at the same time. The induction needle 53 detects that the ignition is successful and the whole equipment runs normally. When the temperature detected by the temperature detector 4 reaches the set threshold, the electric control box 2 controls the combustion assembly to stop burning.

[0025] Specifically, the fan assembly includes an impeller 61 and a motor 62 for driving the impeller 61 to rotate, and the impeller 61 is located between the air inlet 11 and the motor 62 .

[0026] Furthermore, the combustion chamber 56 is provided with a swirl plate 7 for guiding the wind to enter.

[0027] Furthermore, an air outlet 12 is provided on the other side of the cylinder 1 away from the air inlet 11, and the air outlet 12 is configured as a constricted opening.

[0028] After the fan assembly is started, the wind will be sucked in and blow toward the motor 62, which can effectively cool the motor 62. After the wind reaches the swirl plate 7, part of the air will be diverted in the cylinder 1 to play a cooling role and prevent the cylinder 1 from being overheated. A part of the wind-cooled air passes through the swirl plate 7 into the combustion chamber 56 and mixes with the gas to burn and generate hot air. At the air outlet 12 of the cylinder 1, the cylinder 1 has a certain shrinkage, which more effectively mixes the hot air and the cold air together and then transports them to the heating area.

[0029] Furthermore, the cylinder 1 is provided with an inspection door 8 for opening the cylinder 1 to inspect the interior.

[0030] Furthermore, a support seat 9 is provided on the cylinder 1 .

[0031] Furthermore, a lifting lug 10 is provided on the cylinder 1 .

[0032] Overall features:

[0033] 1) After the equipment is started, the cold air passes through the swirl plate 7 and enters the combustion chamber for combustion. The swirl plate 7 forces a large part of the cold air to enter the combustion chamber 56. The swirl plate 7 is stamped with an angled swirl plate. When the cold air passes through the swirl plate, the wind direction will produce turbulent combustion in the combustion chamber 56, so that the combustion is intense and almost no CO is produced.

[0034] 2) In order to further mix the hot air and cold air generated by combustion, the air outlet 12 of the cylinder 1 is set to be a constricted opening, forcing the cold air and the hot air to mix better and making the total hot air temperature uniform.

[0035] 3) The cylinder 1 is made of mirror-finished stainless steel, which is not only corrosion-resistant but also particularly beautiful.

[0036] 4) The electrical components and electric control box 2 of the entire equipment are all fully sealed and have a high level of protection, and can be cleaned with water.

[0037] 5) The whole equipment has a simple structure, consisting of only two inner and outer cylinders 1. During maintenance, there is no need to disassemble the equipment, and maintenance is particularly simple and reliable.

[0038] 6) The equipment is equipped with functions such as wind pressure signal detection, high temperature protection, flame signal monitoring, and automatic cut-off of gas valve 55, which is safe and reliable.

[0039] The above is only a preferred specific implementation of the utility model; however, the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and improved ideas of the utility model within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model.

Claims

1. A cylindrical direct-fired heater, characterized in that: It includes a cylinder, an electric control box arranged on the cylinder, and a fan assembly, a wind pressure switch, a temperature detector and a combustion assembly arranged inside the cylinder and respectively connected to the electric control box. The fan assembly is arranged on one side of the cylinder and close to the air inlet of the cylinder, the wind pressure switch is located between the fan assembly and the combustion assembly, and the temperature detector is close to the combustion assembly.

2. A cylindrical direct-fired heater according to claim 1, characterized in that: The fan assembly comprises an impeller and a motor driving the impeller to rotate, and the impeller is located between the air inlet and the motor.

3. A cylindrical direct-fired heater according to claim 1, characterized in that: The combustion assembly comprises a combustion chamber, and a nozzle, an ignition needle and a sensing needle arranged in the combustion chamber. The nozzle is connected to a gas pipeline, and a gas valve is arranged on the gas pipeline.

4. A cylindrical direct-fired heater according to claim 3, characterized in that: The combustion chamber is provided with a swirl plate for guiding the wind to enter.

5. The cylindrical direct-fired heater according to claim 1, characterized in that: An air outlet is arranged on the other side of the cylinder away from the air inlet, and the air outlet is arranged as a constricted opening.

6. A cylindrical direct-fired air heater according to claim 1, characterized in that: The cylinder is provided with an inspection door for opening the cylinder to inspect the interior.

7. A cylindrical direct-fired heater according to claim 1, characterized in that: A supporting seat is arranged on the cylinder.

8. The cylindrical direct-fired air heater according to claim 1, characterized in that: The cylinder is provided with a lifting lug.

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