Low-temperature tunnel furnace with air circulation structure

Abstract

The utility model discloses a low-temperature tunnel furnace with an air circulation structure, which is characterized in that a circulation air duct is arranged in a box body of the low-temperature tunnel furnace, a variable frequency motor is arranged at the top of the circulation air duct, and a centrifugal impeller is connected onto the variable frequency motor; the centrifugal impeller is installed in the volute, the volute is provided with an air outlet, and the evaporator is arranged below the volute. The variable frequency motor drives the centrifugal impeller to rotate, and air can enter the volute through the evaporator and can be output to the circulating air duct through the air outlet. According to the technical scheme, the temperature uniformity in the low-temperature tunnel furnace is improved, and the temperature and the cooling capacity in the low-temperature tunnel furnace can be effectively controlled.

Description

Technical Field

[0001] The utility model relates to the technical field of temperature control, in particular to a low-temperature tunnel furnace with an air circulation structure. Background Art

[0002] At present, in order to provide high temperature inside the box, the traditional high-temperature tunnel furnace generally adds a heating box outside, or installs a heater inside the tunnel furnace to heat the inside by blowing air. This heating method can ensure that the set temperature is reached at high temperature, but the uniformity of the inside is generally not very good.

[0003] Low-temperature temperature control is more difficult than high-temperature temperature control. In a low-temperature tunnel furnace, if the air duct structure of a high-temperature tunnel furnace is directly adopted, the temperature uniformity inside the box will be worse, making it difficult to effectively control the temperature inside the tunnel furnace. Utility Model Content

[0004] In view of the above problems, the utility model provides a low-temperature tunnel furnace with an air circulation structure. The circulating air duct structure in the low-temperature tunnel furnace can improve the temperature uniformity in the low-temperature tunnel furnace. At the same time, the relative arrangement of the variable frequency motor, centrifugal impeller and volute can effectively control the temperature and cooling capacity in the low-temperature tunnel furnace.

[0005] To achieve the above object, the utility model provides a low-temperature tunnel furnace with an air circulation structure, wherein a circulating air duct is arranged in the box of the low-temperature tunnel furnace, a variable frequency motor is arranged on the top of the circulating air duct, and a centrifugal impeller is connected to the variable frequency motor;

[0006] The centrifugal impeller is installed in a volute, the volute is provided with an air outlet, and an evaporator is provided below the volute;

[0007] The variable frequency motor drives the centrifugal impeller to rotate, and air can enter the volute from the evaporator and can be output to the circulating air duct from the air outlet.

[0008] In the above technical solution, preferably, the volute is provided with two air outlets, and each of the air outlets is provided with an air outlet opening regulator.

[0009] In the above technical solution, preferably, the two air outlets are symmetrically arranged relative to the volute.

[0010] In the above technical solution, preferably, each of the air outlets corresponds to one of the circulation air ducts.

[0011] In the above technical solution, preferably, the edge of the box of the low-temperature tunnel furnace is sealed by a sealing strip so that the box forms a sealed structure.

[0012] In the above technical solution, preferably, the box body of the low-temperature tunnel furnace is provided with a heat-insulating layer, and the heat-insulating layer is sealed with the box body.

[0013] In the above technical solution, preferably, a dry air inlet hole is provided on the box body, and dry air enters the circulating air duct through the dry air inlet hole.

[0014] Compared with the prior art, the beneficial effects of the utility model are: through the circulating air duct structure in the low-temperature tunnel furnace, the temperature uniformity in the low-temperature tunnel furnace is improved, and at the same time, the relative arrangement of the variable frequency motor, centrifugal impeller and volute can effectively control the temperature and cooling capacity in the low-temperature tunnel furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic structural diagram of a low-temperature tunnel furnace with an air circulation structure disclosed in an embodiment of the utility model;

[0016] Figure 2 The present invention is a schematic structural diagram of a low-temperature tunnel furnace with an air circulation structure disclosed in an embodiment of the present invention.

[0017] In the figure, the corresponding relationship between each component and the reference numeral is as follows:

[0018] 1. Low-temperature tunnel furnace, 2. Circulating air duct, 3. Frequency conversion motor, 4. Centrifugal impeller, 5. Air outlet, 6. Evaporator, 7. Air outlet opening regulator, 8. Sealing strip, 9. Insulation layer, 10. Dry air inlet. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] The utility model is further described in detail below in conjunction with the accompanying drawings:

[0021] like Figure 1 and Figure 2 As shown, according to a low-temperature tunnel furnace with an air circulation structure provided by the utility model, a circulating air duct 2 is arranged in the box of the low-temperature tunnel furnace 1, a variable frequency motor 3 is arranged on the top of the circulating air duct 2, and a centrifugal impeller 4 is connected to the variable frequency motor 3;

[0022] The centrifugal impeller 4 is installed in the volute, the volute is provided with an air outlet 5, and an evaporator 6 is provided below the volute;

[0023] The frequency conversion motor 3 drives the centrifugal impeller 4 to rotate, and air can enter the volute from the evaporator 6 and can be output to the circulation air duct 2 from the air outlet 5.

[0024] In this embodiment, the temperature uniformity in the low-temperature tunnel furnace 1 is improved through the circulating air duct 2 structure in the low-temperature tunnel furnace 1. At the same time, the relative arrangement of the variable frequency motor 3, the centrifugal impeller 4 and the volute can effectively control the temperature and cooling capacity in the low-temperature tunnel furnace 1.

[0025] Specifically, when the equipment is running, the variable frequency motor 3 drives the centrifugal impeller 4 to rotate, and the wind enters the volute through the evaporator 6, and then blows out through the outlet of the volute into the circulating air duct 2, and blows out from the outlet of the low-temperature tunnel furnace 1, completing an air cycle.

[0026] In the above embodiment, preferably, the volute is provided with two air outlets 5, and each air outlet 5 is provided with an air outlet opening regulator 7. The air volume of the air blowing on both sides of the tunnel furnace is controlled by controlling the air outlet opening regulator 7, and the frequency of the variable frequency motor 3 is controlled to control the output of the cooling capacity.

[0027] Specifically, when the uniformity on both sides of the low-temperature tunnel furnace 1 is not good, the air volume on both sides is adjusted by adjusting the air port opening regulator 7 to achieve the purpose of uniform temperature; when the temperature difference between the middle position inside the low-temperature tunnel furnace 1 and the two sides is large, the air volume can be increased by increasing the frequency of the variable frequency motor 3 to achieve the purpose of uniform temperature.

[0028] In the above embodiment, preferably, the two air outlets 5 are symmetrically arranged relative to the volute to improve the temperature uniformity in the box of the low-temperature tunnel furnace 1 .

[0029] In the above embodiment, preferably, each air outlet 5 corresponds to one circulation air duct 2 to achieve the continuity of the air duct.

[0030] In the above embodiment, preferably, the edge of the box of the low-temperature tunnel furnace 1 is sealed by a sealing strip 8 to ensure the sealing of the cold and prevent condensation.

[0031] In the above embodiment, preferably, the box body of the low-temperature tunnel furnace 1 is provided with a heat-insulating layer 9, and the heat-insulating layer 9 is sealed with the box body to improve the heat-insulating performance and prevent condensation.

[0032] In the above embodiment, preferably, a dry air inlet hole 10 is provided on the box body, and dry air can be introduced into the circulating air duct 2 through the dry air inlet hole 10 .

[0033] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A low-temperature tunnel furnace with an air circulation structure, characterized in that: A circulating air duct is arranged in the box of the low-temperature tunnel furnace, a variable frequency motor is arranged on the top of the circulating air duct, and a centrifugal impeller is connected to the variable frequency motor; The centrifugal impeller is installed in a volute, the volute is provided with an air outlet, and an evaporator is provided below the volute; The variable frequency motor drives the centrifugal impeller to rotate, and air can enter the volute from the evaporator and can be output to the circulating air duct from the air outlet.

2. The low-temperature tunnel furnace with an air circulation structure according to claim 1, characterized in that: The volute is provided with two air outlets, and each of the air outlets is provided with an air outlet opening regulator.

3. The low-temperature tunnel furnace with an air circulation structure according to claim 2, characterized in that: The two air outlets are symmetrically arranged relative to the volute.

4. The low-temperature tunnel furnace with an air circulation structure according to claim 2, characterized in that: Each of the air outlets corresponds to one of the circulation air ducts.

5. The low-temperature tunnel furnace with an air circulation structure according to claim 1, characterized in that: The edge of the box of the low-temperature tunnel furnace is sealed by a sealing strip so that the box forms a sealed structure.

6. The low-temperature tunnel furnace with an air circulation structure according to claim 5, characterized in that: The box body of the low-temperature tunnel furnace is provided with a heat-insulating layer, and the heat-insulating layer is sealed with the box body.

7. The low-temperature tunnel furnace with an air circulation structure according to claim 1, characterized in that: The box body is provided with a dry air inlet hole, and dry air enters the circulating air duct through the dry air inlet hole.

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