Heat treatment furnace with uniform cooling function

Abstract

The utility model relates to a heat treatment furnace with uniform cooling, which comprises a furnace body, an air inlet pipeline, an air outlet pipeline, a control device, a circulating fan and an air cooler, the circulating fan is mounted at the top of an inner cavity of the furnace body, a plurality of air inlet channels respectively positioned on two opposite side walls of the furnace body are arranged on the furnace body, and the air inlet pipeline comprises an air inlet main pipe and two air inlet branch pipes; the air cooler is connected with the air inlet main pipe, the two air inlet branch pipes are communicated with air inlet channels on the two side walls of the furnace body respectively, gravity check valves are installed on the air inlet channels, venturi valves are arranged on the air inlet branch pipes, and the control device is connected with the circulating fan, the air cooler, the gravity check valves and the venturi valves. When the heat treatment furnace capable of uniformly cooling disclosed by the utility model is used for cooling, cold air can be equivalently and uniformly fed into the inner cavity of the furnace body in a multi-point manner, so that the inner cavity of the furnace body can be uniformly air-cooled, the temperature difference between different positions of a product in the furnace body is avoided when the product is cooled, and the cooling effect and quality of the product are ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of heat treatment furnace, more particularly to a heat treatment furnace of even cooling. BACKGROUND

[0002] When the heat treatment furnace enters the cooling stage after the heat preservation ends, the existing technology mostly adopts the air cooling with the furnace cooling mode to cool. The lower side of the rear wall of the heat treatment furnace is opened, the air fan outside the furnace blows air into the furnace, the cold air entering the furnace is driven by the circulating fan to circulate and cool the products in the furnace, and the hot air is discharged outside through the exhaust hole on the upper side of the rear wall.

[0003] Therefore, in the cooling process of the heat treatment furnace, the air fan directly blows the air into the inlet of the lower side of the material tray, and the cold air is transported to the inner cavity of the heat treatment furnace. In the process of cooling the heat treatment furnace by the cold air, the temperature drop speed of the side of the inner cavity of the heat treatment furnace close to the inlet is different from that of the side of the inner cavity of the heat treatment furnace far from the inlet, which leads to different cooling speeds of the products at different positions in the cooling process of the products in the inner cavity of the heat treatment furnace, resulting in uneven cooling of the products, temperature difference between different positions of the products during cooling, and poor cooling effect of the products, which has adverse effects on the quality of the products. UTILITY MODEL CONTENT

[0004] The utility model aims at overcoming the defects of uneven cooling of the heat treatment furnace in the cooling process and temperature difference between different positions of the products during cooling in the prior art, and provides a heat treatment furnace of even cooling.

[0005] To solve the above technical problems, the utility model adopts the technical scheme of:

[0006] The utility model provides a kind of even cooling heat treatment furnace, including furnace body, air inlet pipeline, air outlet pipeline, control device, circulating fan and cold air machine, the air outlet pipeline is installed in the top of the furnace body and is communicated with the inner chamber of the furnace body, the circulating fan is installed in the top of the inner chamber of the furnace body, the furnace body is equipped with a plurality of air inlet channels, a plurality of the air inlet channels are located on the opposite two side walls in the furnace body and are linearly arranged on the side wall of the furnace body, the air inlet pipeline includes air inlet main pipe and air inlet branch pipe, the air inlet branch pipe is connected with the air outlet end of the air inlet main pipe, the cold air machine is connected with the air inlet end of the air inlet main pipe, two the air inlet branch pipe is located on the opposite two sides of the furnace body, the air inlet channel on the side wall of the furnace body is communicated with two the air inlet branch pipe respectively, the air outlet of the air inlet channel is equipped with gravity check valve, one end of the air inlet branch pipe is equipped with venturi valve, the control device is connected with the circulating fan, the cold air machine, the gravity check valve and the venturi valve.

[0007] The utility model discloses a kind of even cooling heat treatment furnace, when carrying out cooling work, control device controls cold air machine, circulating fan, venturi valve and gravity check valve work, cold air machine starts work, and cold air is blown into air inlet main pipe, and cold air into air inlet main pipe continues to advance along air inlet main pipe, until into two air inlet branch pipes, cold air continues to advance along air inlet branch pipe after entering air inlet branch pipe, until from the air outlet end of air inlet branch pipe enters the air inlet channel on the furnace body, then again from air inlet channel enters the inner chamber of the furnace body, and the inner chamber of the furnace body is cooled down.

[0008] The utility model discloses a kind of even cooling heat treatment furnace, when carrying out cooling work, control device controls cold air machine, circulating fan, venturi valve and gravity check valve work, cold air machine starts work, and cold air is blown into air inlet main pipe, and cold air into air inlet main pipe continues to advance along air inlet main pipe, until into two air inlet branch pipes, cold air continues to advance along air inlet branch pipe after entering air inlet branch pipe, until from the air outlet end of air inlet branch pipe enters the air inlet channel on the furnace body, then again from air inlet channel enters the inner chamber of the furnace body, and the inner chamber of the furnace body is cooled down.

[0009] Further, the air inlet main pipe is provided with an air inlet valve, which is arranged between the air inlet of the air inlet main pipe and the air outlet of the air cooler; the air outlet pipeline is provided with an air outlet valve, which is arranged between the air outlet of the air outlet pipeline and the air inlet of the inner cavity of the furnace body. The air inlet main pipe and the air outlet pipeline are both provided with valves, which can isolate the hot air in the furnace in the non-cooling stage, and the valves can prevent the hot air in the furnace from escaping.

[0010] Further, the air inlet channels are located at the bottom of the side walls of the furnace body. A plurality of air inlet channels are linearly and equidistantly arranged along the axis direction of the air inlet branch pipes on the side walls of the furnace body, and the axes of the air inlet channels located at opposite positions on the two side walls of the furnace body coincide. The air inlet branch pipes are provided with a plurality of air guide pipes which are linearly and equidistantly arranged along the axis direction of the air inlet branch pipes, each air guide pipe communicates with an air inlet channel, and the Venturi valve is installed on the air guide pipe. The air inlet channels are located at the bottom of the side walls of the furnace body, so that the cold air in the furnace body enters from the bottom of the furnace body and is discharged from the top of the furnace body after heat exchange, which can better cool the products in the furnace body. The air inlet channels are linearly and equidistantly arranged, and the axes of the air inlet channels on the two side walls of the furnace body coincide, which can further make the air inlet more uniform. The air inlet branch pipes communicate with the air inlet channels through the air guide pipes, and the Venturi valve is installed on the air guide pipe, which can more conveniently control the cold air flow in each air inlet channel.

[0011] Further, one end of the air outlet pipeline connected with the furnace body and the circulating fan are located at opposite sides of the inner cavity of the furnace body, respectively, and the circulating fan can drive the cooling air flow to circulate in the inner cavity of the furnace body. The circulating fan and the one end of the air outlet pipeline connected with the furnace body are located at opposite sides of the inner cavity of the furnace body, respectively, which can better enable the circulating fan to blow the air flow in the inner cavity of the furnace body and better drive the air flow to circulate.

[0012] Further, the one end of the air outlet pipeline connected with the furnace body is provided with a plurality of air guide openings, each air guide opening corresponding to a circulating fan. The air outlet pipeline is provided with a plurality of air guide openings, which can further accelerate the speed of the air flow discharged from the inner cavity of the furnace body, each air guide opening corresponding to a circulating fan, so that the air outlet speeds of each air guide opening are substantially the same, which further improves the uniformity of the temperature cooling in the furnace body and ensures that the products can be uniformly cooled.

[0013] Further, the top of the inner cavity of the furnace body is provided with a partition one, and the circulating fan and the product are located on the upper and lower sides of the partition one respectively, the inner cavity of the furnace body is provided with a plurality of sub-zones, each of the sub-zones comprises one circulating fan, one air guide port and 2-4 air inlets, two adjacent sub-zones are separated by a partition two, the plane where the partition two is located is perpendicular to the plane where the partition one is located, and the partition one and the partition two are fixedly connected with the furnace body. The partition one is arranged so that the circulating fan has an independent air duct, and the uniform movement direction of the cold air when the circulating fan drives the cold air circulation is further ensured. The different sub-zones are separated by the partition two after the sub-zones are arranged, the circulating fan and the air guide port in each sub-zone correspond to 2-4 air inlets, the cooling speed of the products in the furnace can be further ensured, and the air flow in the furnace can be smoothly discharged.

[0014] Further, the inner cavity of the furnace body is provided with a material support capable of supporting products, the material support has a plurality of layers, and a ventilation gap is arranged between two adjacent layers on the material support. The material support is arranged in a multi-layer structure, can support more products, and enables the heat treatment furnace to heat more products at the same time. The ventilation gap on the material support can be used for the hot air and the cold air to enter, and the uniformity of the products during heating or cooling is improved.

[0015] Further, in the vertical direction, the length of the material support leg is greater than the height of the air inlet channel from the bottom surface of the inner cavity of the furnace body. The length of the support leg is greater than the height of the air inlet from the bottom surface of the inner cavity of the furnace body, so that the cold air entering the inner cavity of the furnace body through the air inlet can blow the products above the support, avoid the products not being blown by the cold air, and avoid the situation that the cooling speeds of the products are inconsistent.

[0016] Compared with the prior art, the heat treatment furnace for uniform cooling has the following beneficial effects:

[0017] When the heat treatment furnace for uniform cooling cools, the air inlet branch pipes on both sides of the furnace body and the plurality of air guide pipes on the air inlet branch pipes simultaneously introduce air into the inner cavity of the furnace body, so that the inner cavity of the furnace body can be uniformly air-cooled, the temperature difference between different positions of the products in the furnace body during cooling is avoided, and the cooling effect and quality of the products are ensured.

[0018] The heat treatment furnace for uniform cooling further comprises a Venturi valve and a gravity check valve arranged on the air inlet branch pipe, which can not only ensure that the air inlet amount of each air inlet of the inner cavity of the furnace body is the same, but also prevent the hot air in the furnace from flowing back into the air inlet branch pipe.

[0019] The support of the heat treatment furnace capable of uniform cooling is provided with several layers, and can heat and cool several products at the same time; the length of the support leg is greater than the height of the air inlet from the bottom surface of the inner cavity of the furnace body, so that the cold air entering the inner cavity of the furnace body through the air inlet blows the products above the support, avoids that the products are not blown by the cold air, and avoids that the cooling speed of the products is inconsistent. BRIEF DESCRIPTION OF DRAWINGS

[0020] Fig. 1 It is a schematic view of the internal structure in the top view direction of the heat treatment furnace capable of uniform cooling, and the arrows in the figure indicate the gas flow direction;

[0021] Fig. 2 It is a schematic view of the internal structure in the side view direction of the heat treatment furnace capable of uniform cooling, and the arrows in the figure indicate the gas flow direction;

[0022] Fig. 3 It is a schematic view of the internal structure in the front view direction of the heat treatment furnace capable of uniform cooling, and the arrows in the figure indicate the gas flow direction.

[0023] In the drawings: 1, furnace body; 2, air outlet pipeline; 3, air inlet main pipe; 4, air inlet branch pipe; 401, air guide pipe; 5, air inlet channel; 6, circulating fan; 7, air inlet valve; 8, Venturi valve; 9, gravity check valve; 10, material support; 11, product; 12, cold air fan; 13, air outlet valve. DETAILED DESCRIPTION

[0024] The utility model will be further explained in combination with specific implementation. Among them, the drawings are only used for example description, and the representation is only a schematic view, and cannot be understood as the limitation of the patent; in order to better illustrate the embodiment of the utility model, some components of the drawings will be omitted, enlarged or reduced, and the size of the actual product is not represented; for those skilled in the art, some well-known structures in the drawings and their description can be omitted and understood.

[0025] The same or similar reference numerals in the drawings of the embodiments of the utility model correspond to the same or similar components; in the description of the utility model, it is understood that if the orientation or position relationship indicated by the terms "upper", "lower", "left", "right" and the like is based on the orientation or position relationship shown in the drawings, it is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, a particular orientation and operation, therefore the positional relationship description in the drawings is only used for example description, and cannot be understood as the limitation of the patent, and for those skilled in the art, the specific meaning of the above terms can be understood according to the specific situation.

[0026] Embodiment one

[0027] This embodiment is a first embodiment of a uniformly cooled heat treatment furnace, such as... Figs. 1-3 As shown, the furnace includes a furnace body 1, an air inlet pipe, an air outlet pipe 2, a control device, a circulating fan 6, and a cooler 12. The air outlet pipe 2 is installed on the top left side of the furnace body 1 and communicates with the inner cavity of the furnace body 1. The circulating fan 6 is installed on the top right side of the inner cavity of the furnace body 1. The furnace body 1 is provided with several air inlet channels 5, which are located on two opposite side walls of the furnace body 1 and arranged linearly on the side walls of the furnace body 1. The air inlet pipe includes a main air inlet pipe 3 and a branch air inlet pipe 4. Pipe 4 is connected to the outlet end of the main air intake pipe 3, and the air cooler 12 is connected to the air intake end of the main air intake pipe 3. Two air intake branch pipes 4 are located on opposite sides of the furnace body 1. The air intake channels 5 on both sides of the furnace body 1 are connected to the two air intake branch pipes 4 respectively. A gravity check valve 9 is installed at the air outlet of the air intake channel 5. A Venturi valve 8 is provided at one end of the air intake branch pipe 4 that is connected to the air intake channel 5. The control device is connected to the circulating fan 6, the air cooler 12, the gravity check valve 9 and the Venturi valve 8.

[0028] The working principle or process of this embodiment is as follows:

[0029] When the heat treatment furnace is cooling, the control device controls the operation of the cold air fan 12, the circulating fan 6, the venturi valve 8, and the gravity check valve 9. After the cold air fan 12 starts working, it blows cold air into the main intake pipe 3. The cold air entering the main intake pipe 3 continues to move forward along the main intake pipe 3 until it enters the two intake branch pipes 4. After entering the intake branch pipes 4, the cold air continues to move forward along the intake branch pipes 4 until it enters the air intake channel 5 on the furnace body 1 from the air outlet end of the intake branch pipe 4. Then, it enters the inner cavity of the furnace body 1 from the air intake channel 5 to cool the inner cavity of the furnace body 1. Since the intake branch pipes 4 are equipped with several air guide pipes 401, and the intake branch pipes 4 are also equipped with venturi valves 8, the venturi valves 8 control the flow rate of cold air entering the air intake channel 5, so that the flow rate of cold air in all air intake channels 5 is the same. Therefore, cold air can enter the inner cavity of the furnace body 1 evenly through several air inlet channels 5, so that the temperature inside the furnace body 1 can drop evenly. At the same time, the gravity check valve 9 can prevent hot air inside the heat treatment furnace from flowing back and escaping from the air inlet pipe. The cold air entering the inner cavity of the furnace body 1 is cooled and circulated inside the furnace body 1 by the circulating fan 6, cooling the products inside the furnace. After completing the cooling work, it is discharged from the inner cavity of the furnace body 1 through the air outlet pipe 2 at the top of the inner cavity of the furnace body 1.

[0030] The beneficial effects of the embodiment are as follows: the embodiment can complete the uniform and equal air intake into the inner cavity of the furnace body 1 through the air inlet branch pipes 4 on both sides of the furnace body 1 and the plurality of air inlet channels 5 on the furnace body 1, so that the inner cavity of the furnace body 1 can be uniformly air-cooled, and the temperature difference between different positions of the product 11 in the furnace body 1 during cooling is avoided, thereby ensuring the cooling effect and quality of the product 11. The setting of the Venturi valve 8 can ensure that the air intake of each air inlet channel 5 is the same, and the setting of the gravity check valve 9 can avoid the escape of hot air in the heat treatment furnace.

[0031] Embodiment two

[0032] The embodiment is a second embodiment of a uniform cooling heat treatment furnace, as shown in Figs. 1-3 The embodiment further limits the valves on the air inlet pipe and the air outlet pipe 2 based on the first embodiment.

[0033] Specifically, the air inlet main pipe 3 is provided with an air inlet valve 7, and the air inlet valve 7 is arranged between the air inlet of the air inlet main pipe 3 and the air outlet of the air cooler 12. The air outlet pipe 2 is provided with an air outlet valve 13, and the air outlet valve 13 is arranged between the air outlet of the air outlet pipe 2 and the air inlet of the inner cavity of the furnace body 1.

[0034] Specifically, the air inlet channel 5 is located at the bottom of the side wall of the furnace body 1. The plurality of air inlet channels 5 are linearly and equidistantly arranged on the side wall of the furnace body 1 along the axis direction of the air inlet branch pipe 4, and the axis lines of the air inlet channels 5 at opposite positions on the two side walls of the furnace body 1 coincide. The air inlet branch pipe 4 is provided with a plurality of air guide pipes 401 which are linearly and equidistantly arranged along the axis direction of the air inlet branch pipe 4, each air guide pipe 401 is in communication with an air inlet channel 5, and the Venturi valve 8 is installed on the air guide pipe 401.

[0035] The beneficial effects of the embodiment are as follows:

[0036] Valves are arranged on the air inlet main pipe 3 and the air outlet pipe 2, which can isolate the hot air in the furnace during the non-cooling stage, and the valves can prevent the hot air in the furnace from escaping. The air inlet channel 5 is located at the bottom of the side wall of the furnace body 1, so that the cold air in the furnace body 1 enters from the bottom of the furnace body 1, and after heat exchange, it is discharged from the top of the furnace body 1, which is better for the cooling effect of the product 11 in the furnace body 1. The air inlet channel 5 is linearly and equidistantly arranged, and the axis lines of the air inlet channels 5 on the two side walls of the furnace body 1 coincide, which can further make the air intake more uniform. The air inlet branch pipe is in communication with the air inlet channel 5 through the air guide pipe 401, and the Venturi valve 8 is installed on the air guide pipe 401, which can more conveniently control the cold air flow in each air inlet channel 5.

[0037] Embodiment three

[0038] The embodiment is a third embodiment of a uniform cooling heat treatment furnace, as shown in Figs. 1-3As shown, the embodiment is based on the first and second embodiments, and further defines other structures of the heat treatment furnace.

[0039] Specifically, the end of the air outlet pipeline 2 connected with the furnace body 1 and the circulating fan 6 are located on the two sides of the inner cavity of the furnace body 1 respectively, and the circulating fan 6 can drive the cooling air flow to circulate in the inner cavity of the furnace body 1.

[0040] Specifically, the end of the air outlet pipeline 2 connected with the furnace body 1 is provided with a plurality of air guide ports, and each air guide port corresponds to a circulating fan. The inner cavity of the furnace body 1 is provided with a partition plate one 14, and the circulating fan 6 and the product in the inner cavity of the furnace body 1 are located on the upper and lower sides of the partition plate one respectively. The inner cavity of the furnace body 1 is provided with a plurality of partitions, and each partition includes one circulating fan 6, one air guide port and 2-4 air inlets. Adjacent two partitions are separated by a partition plate two 15, and the plane where the partition plate two 15 is located is perpendicular to the plane where the partition plate one 14 is located. The partition plate one 14 and the partition plate two 15 are fixedly connected with the furnace body 1.

[0041] Specifically, the inner cavity of the furnace body 1 is provided with a material support 10 for supporting the product 11, and the material support 10 has a plurality of layers. Ventilation gaps are provided between adjacent two layers on the material support 10. In the vertical direction, the length of the support leg of the material support 10 is greater than the height of the air inlet channel 5 from the inner cavity bottom surface of the furnace body 1.

[0042] The beneficial effects of the embodiment are as follows:

[0043] The end of the circulating fan 6 and the air outlet pipeline 2 connected with the furnace body 1 are located on the two sides of the inner cavity of the furnace body 1 respectively, so that the blowing effect of the circulating fan 6 on the air flow in the inner cavity of the furnace body 1 is better, and the air flow can be driven to circulate more effectively. The partition plate one 14 is provided so that the circulating fan 6 has an independent air duct, which further ensures that the cold air has a uniform movement direction when the circulating fan 6 drives the cold air to circulate. After the partitions are set, the different partitions are separated by the partition plate two 15, and the circulating fan 6 and the air guide port in each partition correspond to 2-4 air inlets, which not only can further ensure the cooling speed of the product in the furnace, but also can ensure the smooth exhaust of the air flow in the furnace. The material support 10 has a multi-layer structure and can support more products 11, so that the heat treatment furnace can heat more products 11 at the same time. The ventilation gaps on the material support 10 can allow hot air and cold air to enter, thereby improving the uniformity of the products 11 during heating or cooling. The length of the support leg is greater than the height of the air inlet channel 5 from the inner cavity bottom surface of the furnace body 1, so that the cold air entering the inner cavity of the furnace body 1 through the air inlet will blow the products 11 above the support, avoiding that some products 11 are not blown by the cold air, and avoiding that the cooling speed of the products 11 is inconsistent.

[0044] In the specific contents of the foregoing specific embodiments, each technical feature can be combined arbitrarily without contradiction, and to make the description brief, all possible combinations of the foregoing technical features are not described, however, as long as the combinations of the technical features do not exist contradiction, it should be considered that it is within the scope of the present disclosure.

[0045] Obviously, the above embodiments of the present application are merely examples for clearly illustrating the present application, and are not intended to limit the implementation modes of the present application. For ordinary skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, it is not necessary and also impossible to exhaust all the implementation modes. Any modification, equivalent replacement and improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application claims.

Claims

1. A heat treatment furnace for uniform cooling, comprising a furnace body (1), an air inlet duct and an air outlet duct (2) installed on the top of the furnace body (1) and communicating with the inner cavity of the furnace body (1), characterized in that, The control device, the circulating fan (6) and the cold air fan (12) are further included, the circulating fan (6) is installed at the top of the inner cavity of the furnace body (1), the furnace body (1) is provided with a plurality of air inlet channels (5), the air inlet channels (5) are respectively located on the opposite two side walls of the furnace body (1) and are linearly arranged on the side walls of the furnace body (1), the air inlet pipeline comprises an air inlet main pipe (3) and an air inlet branch pipe (4), the air inlet branch pipe (4) is connected with the air outlet end of the air inlet main pipe (3), the cold air fan (12) is connected with the air inlet end of the air inlet main pipe (3), the two air inlet branch pipes (4) are respectively located on the opposite two sides of the furnace body (1), the air inlet channels (5) on the two side walls of the furnace body (1) are respectively communicated with the two air inlet branch pipes (4), the air outlet of the air inlet channel (5) is provided with a gravity check valve (9), one end of the air inlet branch pipe (4) connected with the air inlet channel (5) is provided with a Venturi valve (8), and the control device is connected with the circulating fan (6), the cold air fan (12), the gravity check valve (9) and the Venturi valve (8).

2. A uniformly cooled heat treatment furnace as claimed in claim 1, characterized in that The air inlet main pipe (3) is provided with an air inlet valve (7), the air inlet valve (7) is arranged between the air outlet of the cold air fan (12) and the air inlet of the air inlet main pipe (3), the air outlet pipeline (2) is provided with an air outlet valve (13), the air outlet valve (13) is arranged between the air outlet of the air outlet pipeline (2) and the air inlet of the inner cavity of the furnace body (1), and the air inlet valve (7) and the air outlet valve (13) are connected with the control device.

3. A uniformly cooled heat treatment furnace as claimed in claim 1, characterized in that, The air inlet channel (5) is located at the bottom of the side wall of the furnace body (1).

4. A uniformly cooled heat treatment furnace as defined in claim 1, characterized in that A plurality of air inlet channels (5) are linearly and equidistantly arranged on the side wall of the furnace body (1) along the axis direction of the air inlet branch pipe (4), and the air inlet channels (5) on the opposite positions of the two side walls of the furnace body (1) are coaxial.

5. A uniformly cooled heat treatment furnace as claimed in claim 4, characterised in that, The air inlet branch pipe (4) is provided with a plurality of air guide pipes (401) which are linearly and equidistantly arranged along the axis direction of the air inlet branch pipe (4), each air guide pipe (401) is communicated with an air inlet channel (5), and the Venturi valve is arranged on the air guide pipe (401).

6. A uniformly cooled heat treatment furnace as claimed in claim 2, wherein, The one end of the air outlet pipeline (2) connected with the furnace body (1) and the circulating fan (6) are respectively located on the two sides of the inner cavity of the furnace body (1), and the circulating fan (6) can drive the cooling airflow to perform cooling circulation in the inner cavity of the furnace body (1).

7. A uniformly cooled heat treatment furnace as claimed in claim 6, characterised in that, The one end of the air outlet pipeline (2) connected with the furnace body (1) is provided with a plurality of air guide openings, and each air guide opening corresponds to a circulating fan (6).

8. A uniformly cooled heat treatment furnace as claimed in claim 7, characterised in that, The top of the inner cavity of the furnace body (1) is provided with a partition one (14), the circulating fan (6) and the product in the inner cavity of the furnace body (1) are respectively located on the two sides of the partition one (14), the inner cavity of the furnace body (1) is provided with a plurality of partitions, each partition comprises a circulating fan (6), a gas guide port and 2-4 air inlets, two adjacent partitions are separated by a partition two (15), the plane where the partition two (15) is located is perpendicular to the plane where the partition one (14) is located, and the partition one (14) and the partition two (15) are fixedly connected with the furnace body (1).

9. A heat-treatment furnace with uniform cooling according to any one of claims 1-8, characterized in that, The inner cavity of the furnace body (1) is provided with a material support (10) for supporting the product (11), the material support (10) is provided with multiple layers, and there is a ventilation gap between adjacent two layers.

10. A uniformly cooled heat treatment furnace as claimed in claim 9, characterised in that, In the vertical direction, the length of the material support (10) leg is greater than the height of the air inlet channel (5) from the inner cavity bottom surface of the furnace body (1).

Images