Heat preservation room with temperature adjusting structure

By adopting four sets of air inlet and spiral air outlet structures in the factory ventilation and temperature regulation system, combined with the use of electric heaters, the problems of high cost and low temperature regulation efficiency of the existing system are solved, and efficient and low-cost temperature regulation is achieved.

CN222837043UActive Publication Date: 2025-05-06HUACHI KINETIC ENERGY (LIAONING) TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202421570292.8
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-07-04
Publication Date
2025-05-06
Estimated Expiration
2034-07-04

AI Technical Summary

Technical Problem

The existing factory ventilation and temperature regulation system is costly and complex in structure, making it difficult to effectively adjust the temperature in a short period of time, especially when the temperature drops in summer and the temperature rises in winter.

Method used

A temperature regulation system with four sets of air inlet structures and four sets of spiral air outlet structures is adopted to maximize the heat in the insulation room through air inlet and air outlet operations, and the temperature is quickly increased by using an electric heater if necessary.

Benefits of technology

It realizes effective adjustment of the temperature in the insulation room in a short period of time, reduces the cost of ventilation and temperature regulation, and ensures the constant internal temperature.

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Abstract

The utility model provides a heat preservation room with a temperature adjusting structure, and relates to the technical field of temperature adjusting structures. The heat preservation room comprises a heat preservation room, a temperature adjusting structure is arranged on the heat preservation room, the temperature adjusting structure comprises an air inlet structure and a spiral air outlet structure, and the air inlet structure comprises a first air inlet structure, a second air inlet structure, a third air inlet structure and a fourth air inlet structure. The spiral air outlet structures comprise the first spiral air outlet structure, the second spiral air outlet structure, the third spiral air outlet structure and the fourth spiral air outlet structure. According to the utility model, the four groups of air inlet structures are matched with the four groups of spiral air outlet structures, so that heat in the heat preservation room can be taken away to the greatest extent through air inlet and air outlet operations, and the heat preservation room can take away a large amount of heat in a short time by adopting a multi-group structure; therefore, the internal temperature of the heat preservation room is kept constant.
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Description

Technical Field

[0001] The utility model relates to the technical field of temperature regulating structures, in particular to a heat preservation room with a temperature regulating structure. Background Art

[0002] Most of the existing buildings are oriented north-south, and so are the factory buildings. The air temperature on the south and north sides of the factory buildings will be different in different seasons. For example, the air temperature on the north side of the factory building is lower than the air temperature on the south side of the factory building in summer. The temperature inside the factory building is as high as 40-50 degrees in summer production, but only 10-12 degrees in winter, and the best working environment is around 25 degrees. Therefore, the factory building must be cooled in summer and heated in winter. However, the ventilation and temperature control system used in the current factories is relatively expensive and has a complex structure, which increases the burden on enterprises.

[0003] In the prior art, a patent document with publication number CN204345859U proposes a ventilation and temperature control structure for an enameled wire plant, including a main air inlet pipe, a first air inlet fan is provided at one end of the main air inlet pipe, a second air inlet fan is provided at the other end, an air inlet gate valve is provided in each of the main air inlet pipes next to the first air inlet fan and the second air inlet fan, more than one cold air pipe is connected to one side of the main air inlet pipe, more than one hot air pipe is connected to the other side of the main air inlet pipe, a smoke exhaust pipe of the enameled wire production equipment is provided in the hot air pipe, an air inlet gate valve is provided inside each cold air pipe and hot air pipe, each air inlet gate valve is connected to a stepper motor, and the stepper motor is connected to the air inlet gate valve control cabinet. The ventilation and temperature control structure of the utility model has the advantages of strong practicality, simple structure but good temperature control effect, intelligent adjustment, uniform temperature, etc., and low ventilation and temperature control cost.

[0004] Although the existing technology solves the problem of air intake temperature control, in actual working process, there is still the problem that the temperature control effect of air intake and exhaust air alone is not good. Utility Model Content

[0005] In view of the shortcomings existing in the above-mentioned problems, the utility model provides a thermal insulation room with a temperature regulating structure, so that the utility model cooperates with four groups of air inlet structures and four groups of spiral air outlet structures, so that the heat in the thermal insulation room can be taken away to the maximum extent through air inlet and air outlet operations, and by adopting multiple groups of structures, the thermal insulation room can take away a large amount of heat in a short time, thereby ensuring the constant internal temperature of the thermal insulation room.

[0006] In order to solve the above problems, the utility model provides a thermal insulation room with a temperature control structure, including a thermal insulation room, on which the temperature control structure is arranged, wherein the temperature control structure includes an air inlet structure and a spiral air outlet structure, the air inlet structure includes a first air inlet structure, a second air inlet structure, a third air inlet structure and a fourth air inlet structure, the first air inlet structure and the third air inlet structure are arranged at the left end of the thermal insulation room, the second air inlet structure and the fourth air inlet structure are arranged at the right end of the thermal insulation room, the spiral air outlet structure includes a first spiral air outlet structure, a second spiral air outlet structure, a third spiral air outlet structure and a fourth spiral air outlet structure, the first spiral air outlet structure, the second spiral air outlet structure, the third spiral air outlet structure and the fourth spiral air outlet structure are all arranged inside the thermal insulation room, and the first spiral air outlet structure is arranged correspondingly to the first air inlet structure, the second spiral air outlet structure is arranged correspondingly to the second air inlet structure, the third spiral air outlet structure is arranged correspondingly to the third air inlet structure, and the fourth spiral air outlet structure is arranged correspondingly to the fourth air inlet structure.

[0007] Preferably, the first air inlet structure includes a first mounting seat, a first air inlet box, a first fan and a first air outlet, the first mounting seat is arranged at the left end of the thermal insulation room, the first air inlet box is arranged on the first mounting seat, the first fan is arranged at the right end of the first air inlet box, and the right end of the first fan is connected to the inside of the thermal insulation room through the first air outlet.

[0008] Preferably, the first spiral air outlet structure includes a first air outlet box, a first rotating shaft, a first spiral blade and a first air outlet, the left end of the first air outlet box is connected to the first air inlet box, the first rotating shaft is arranged in the first air outlet box, the first rotating shaft is arranged with the first spiral blade, and the first air outlet box is arranged with a plurality of the first air outlets.

[0009] Preferably, the second air inlet structure includes a second mounting seat, a second air inlet box, a second fan and a second air outlet, the second mounting seat is arranged at the right end of the thermal insulation room, the second air inlet box is arranged on the second mounting seat, the second fan is arranged at the left end of the second air inlet box, and the left end of the second fan is connected to the inside of the thermal insulation room through the second air outlet.

[0010] Preferably, the second spiral air outlet structure includes a second air outlet box, a second rotating shaft, a second spiral blade and a second air outlet, the right end of the second air outlet box is connected to the second air inlet box, the second rotating shaft is provided in the second air outlet box, the second spiral blade is provided on the second rotating shaft, and a plurality of second air outlets are provided on the second air outlet box.

[0011] Preferably, the third air inlet structure includes a third mounting seat, a third air inlet box, a third fan and a third air outlet, the third mounting seat is arranged at the left end of the insulation room, the third air inlet box is arranged on the third mounting seat, the third fan is arranged at the right end of the third air inlet box, and the right end of the third fan is connected to the inside of the insulation room through the third air outlet.

[0012] Preferably, the third spiral air outlet structure includes a third air outlet box, a third rotating shaft, a third spiral blade and a third air outlet. The left end of the third air outlet box is connected to the third air inlet box. The third rotating shaft is arranged in the third air outlet box, the third spiral blade is arranged on the third rotating shaft, and a plurality of the third air outlets are arranged on the third air outlet box.

[0013] Preferably, the fourth air inlet structure includes a fourth mounting seat, a fourth air inlet box, a fourth fan and a fourth air outlet, the fourth mounting seat is arranged at the right end of the thermal insulation room, the fourth air inlet box is arranged on the fourth mounting seat, the fourth fan is arranged at the left end of the fourth air inlet box, and the left end of the fourth fan is connected to the interior of the thermal insulation room through the fourth air outlet.

[0014] Preferably, the fourth spiral air outlet structure includes a fourth air outlet box, a fourth rotating shaft, a fourth spiral blade and a fourth air outlet, the right end of the fourth air outlet box is connected to the fourth air inlet box, the fourth rotating shaft is arranged in the fourth air outlet box, the fourth spiral blade is arranged on the fourth rotating shaft, and a plurality of the fourth air outlets are arranged on the fourth air outlet box.

[0015] Compared with the prior art, the utility model has the following advantages:

[0016] 1. In the utility model, four groups of air inlet structures and four groups of spiral air outlet structures are matched, so that the heat in the insulation room can be taken away by air inlet and air outlet operations to the maximum extent, and by adopting multiple groups of structures, a large amount of heat can be taken away from the insulation room in a short time, thereby ensuring the constant internal temperature of the insulation room.

[0017] 2. The utility model is provided with four groups of electric heater structures, and each group of electric heater structures is arranged on a corresponding spiral air outlet structure, so that when the temperature in the insulation room is too low, the spiral airflow in the spiral air outlet structure can be heated up under the action of the electric heater, thereby quickly raising the temperature in the insulation room. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the utility model more clearly understood, the utility model is further described in detail below with reference to the accompanying drawings and examples, but the examples are not intended to limit the utility model.

[0020] like Figure 1 As shown, an embodiment of the utility model includes a thermal insulation room, on which a temperature regulating structure is arranged, the temperature regulating structure includes an air inlet structure and a spiral air outlet structure, the air inlet structure includes a first air inlet structure, a second air inlet structure, a third air inlet structure and a fourth air inlet structure, the first air inlet structure and the third air inlet structure are arranged at the left end of the thermal insulation room, the second air inlet structure and the fourth air inlet structure are arranged at the right end of the thermal insulation room, the spiral air outlet structure includes a first spiral air outlet structure, a second spiral air outlet structure, a third spiral air outlet structure and a fourth spiral air outlet structure, the first spiral air outlet structure, the second spiral air outlet structure, the third spiral air outlet structure and the fourth spiral air outlet structure are all arranged inside the thermal insulation room, and the first spiral air outlet structure is arranged correspondingly to the first air inlet structure, the second spiral air outlet structure is arranged correspondingly to the second air inlet structure, the third spiral air outlet structure is arranged correspondingly to the third air inlet structure, and the fourth spiral air outlet structure is arranged correspondingly to the fourth air inlet structure.

[0021] In this embodiment, the first air inlet structure includes a first mounting seat, a first air inlet box, a first fan and a first air outlet. The first mounting seat is arranged at the left end of the thermal insulation room, the first air inlet box is arranged on the first mounting seat, the left end of the first air inlet box is provided with a first air inlet, the first air inlet filter is provided at the first air inlet, the right end of the first air inlet box is provided with a first fan, and the right end of the first fan is connected to the inside of the thermal insulation room through the first air outlet. The first spiral air outlet structure includes a first air outlet box, a first rotating shaft, a first spiral blade and a first air outlet. The left end of the first air outlet box is connected to the right end of the first air inlet box. The first air outlet box is provided with a first rotating shaft, the first rotating shaft includes a first upper rotating shaft and a first lower rotating shaft, the first spiral blade includes a first upper spiral blade and a first lower spiral blade, the first upper rotating shaft is provided with a first upper spiral blade, the first lower rotating shaft is provided with a first lower spiral blade, and the first air outlet box is provided with a plurality of first air outlets, the first air outlet includes a plurality of first upper air outlets and a plurality of first lower air outlets, the plurality of first upper air outlets are evenly distributed at the top of the first air outlet box, and the plurality of first lower air outlets are evenly distributed at the bottom of the first air outlet box. Wherein, the first air outlet box is provided with a first electric heater structure, the first electric heater structure includes a first upper electric heater and a first lower electric heater, the first upper electric heater is provided at the upper end of the first upper rotating shaft, and the first lower electric heater is provided at the lower end of the first lower rotating shaft.

[0022] In this embodiment, the second air inlet structure includes a second mounting seat, a second air inlet box, a second fan and a second air outlet. The second mounting seat is arranged at the right end of the thermal insulation room, the second air inlet box is arranged on the second mounting seat, the right end of the second air inlet box is provided with a second air inlet, the second air inlet filter is provided at the second air inlet, the left end of the second air inlet box is provided with a second fan, and the left end of the second fan is connected to the inside of the thermal insulation room through the second air outlet. The second spiral air outlet structure includes a second air outlet box, a second rotating shaft, a second spiral blade and a second air outlet. The right end of the second air outlet box is connected to the right end of the second air inlet box. The second air outlet box is provided with a second rotating shaft. The second rotating shaft includes a second upper rotating shaft and a second lower rotating shaft. The second spiral blade includes a second upper spiral blade and a second lower spiral blade. The second upper rotating shaft is provided with a second upper spiral blade. The second lower rotating shaft is provided with a second lower spiral blade. The second air outlet box is provided with a plurality of second air outlets. The second air outlet includes a plurality of second upper air outlets and a plurality of second lower air outlets. The plurality of second upper air outlets are evenly distributed at the top of the second air outlet box, and the plurality of second lower air outlets are evenly distributed at the bottom of the second air outlet box. The second air outlet box is provided with a second electric heater structure. The second electric heater structure includes a second upper electric heater and a second lower electric heater. The second upper electric heater is provided at the upper end of the second upper rotating shaft, and the second lower electric heater is provided at the lower end of the second lower rotating shaft.

[0023] In this embodiment, the third air inlet structure includes a third mounting seat, a third air inlet box, a third fan and a third air outlet. The third mounting seat is arranged at the left end of the thermal insulation room, the third air inlet box is arranged on the third mounting seat, the left end of the third air inlet box is provided with a third air inlet, the third air inlet filter is provided at the third air inlet, the right end of the third air inlet box is provided with a third fan, and the right end of the third fan is connected to the inside of the thermal insulation room through the third air outlet. The third spiral air outlet structure includes a third air outlet box, a third rotating shaft, a third spiral blade and a third air outlet. The left end of the third air outlet box is connected to the right end of the third air inlet box. The third air outlet box is provided with a third rotating shaft. The third rotating shaft includes a third upper rotating shaft and a third lower rotating shaft. The third spiral blade includes a third upper spiral blade and a third lower spiral blade. The third upper rotating shaft is provided with a third upper spiral blade. The third lower rotating shaft is provided with a third lower spiral blade. The third air outlet box is provided with a plurality of third air outlets. The third air outlet includes a plurality of third upper air outlets and a plurality of third lower air outlets. The plurality of third upper air outlets are evenly distributed at the top of the third air outlet box, and the plurality of third lower air outlets are evenly distributed at the bottom of the third air outlet box. The third air outlet box is provided with a third electric heater structure. The third electric heater structure includes a third upper electric heater and a third lower electric heater. The third upper electric heater is provided at the upper end of the third upper rotating shaft, and the third lower electric heater is provided at the lower end of the third lower rotating shaft.

[0024] In this embodiment, the fourth air inlet structure includes a fourth mounting seat, a fourth air inlet box, a fourth fan and a fourth air outlet. The fourth mounting seat is arranged at the right end of the thermal insulation room, the fourth air inlet box is arranged on the fourth mounting seat, the right end of the fourth air inlet box is provided with a fourth air inlet, the fourth air inlet filter is provided at the fourth air inlet, the left end of the fourth air inlet box is provided with a fourth fan, and the left end of the fourth fan is connected to the inside of the thermal insulation room through the fourth air outlet. The fourth spiral air outlet structure includes a fourth air outlet box, a fourth rotating shaft, a fourth spiral blade and a fourth air outlet. The right end of the fourth air outlet box is connected to the right end of the fourth air inlet box. The fourth air outlet box is provided with a fourth rotating shaft. The fourth rotating shaft includes a fourth upper rotating shaft and a fourth lower rotating shaft. The fourth spiral blade includes a fourth upper spiral blade and a fourth lower spiral blade. The fourth upper rotating shaft is provided with a fourth upper spiral blade. The fourth lower rotating shaft is provided with a fourth lower spiral blade. The fourth air outlet box is provided with a plurality of fourth air outlets. The fourth air outlet includes a plurality of fourth upper air outlets and a plurality of fourth lower air outlets. The plurality of fourth upper air outlets are evenly distributed at the top of the fourth air outlet box, and the plurality of fourth lower air outlets are evenly distributed at the bottom of the fourth air outlet box. The fourth air outlet box is provided with a fourth electric heater structure. The fourth electric heater structure includes a fourth upper electric heater and a fourth lower electric heater. The fourth upper electric heater is provided at the upper end of the fourth upper rotating shaft, and the fourth lower electric heater is provided at the lower end of the fourth lower rotating shaft.

[0025] Through the personnel in this field, all the electrical components in this case are connected to their corresponding power supplies through wires, and a suitable controller should be selected according to the actual situation to meet the control requirements. The specific connection and control sequence should refer to the following working principle, and the electrical connection between the electrical components is completed in the order of working in sequence. The detailed connection means are well-known technologies in this field. The following mainly introduces the working principle and process, and does not explain the electrical control.

[0026] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

[0027] In the description of this specification, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the technical solutions of this patent and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on this patent application.

[0028] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this patent application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0029] In this specification, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this specification can be understood according to specific circumstances.

[0030] In this specification, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0031] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0032] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A heat preservation room with a temperature adjustment structure, comprising a heat preservation room, wherein the heat preservation room is provided with a temperature adjustment structure, characterized in that: The temperature regulating structure includes an air inlet structure and a spiral air outlet structure, the air inlet structure includes a first air inlet structure, a second air inlet structure, a third air inlet structure and a fourth air inlet structure, the first air inlet structure and the third air inlet structure are arranged at the left end of the thermal insulation room, the second air inlet structure and the fourth air inlet structure are arranged at the right end of the thermal insulation room, the spiral air outlet structure includes a first spiral air outlet structure, a second spiral air outlet structure, a third spiral air outlet structure and a fourth spiral air outlet structure, the first spiral air outlet structure, the second spiral air outlet structure, the third spiral air outlet structure and the fourth spiral air outlet structure are all arranged inside the thermal insulation room, and the first spiral air outlet structure is arranged corresponding to the first air inlet structure, the second spiral air outlet structure is arranged corresponding to the second air inlet structure, the third spiral air outlet structure is arranged corresponding to the third air inlet structure, and the fourth spiral air outlet structure is arranged corresponding to the fourth air inlet structure.

2. The heat preservation room with a temperature regulating structure according to claim 1, characterized in that: The first air inlet structure includes a first mounting seat, a first air inlet box, a first fan and a first air outlet. The first mounting seat is arranged at the left end of the thermal insulation room, the first air inlet box is arranged on the first mounting seat, the first fan is arranged at the right end of the first air inlet box, and the right end of the first fan is connected to the inside of the thermal insulation room through the first air outlet.

3. The heat preservation room with a temperature regulating structure as claimed in claim 2, characterized in that: The first spiral air outlet structure includes a first air outlet box, a first rotating shaft, a first spiral blade and a first air outlet. The left end of the first air outlet box is connected to the first air inlet box. The first rotating shaft is arranged in the first air outlet box. The first spiral blade is arranged on the first rotating shaft. A plurality of the first air outlets are arranged on the first air outlet box.

4. The heat preservation room with a temperature regulating structure according to claim 1, characterized in that: The second air inlet structure includes a second mounting seat, a second air inlet box, a second fan and a second air outlet. The second mounting seat is arranged at the right end of the thermal insulation room, the second air inlet box is arranged on the second mounting seat, the second fan is arranged at the left end of the second air inlet box, and the left end of the second fan is connected to the inside of the thermal insulation room through the second air outlet.

5. The heat preservation room with a temperature regulating structure as claimed in claim 4, characterized in that: The second spiral air outlet structure includes a second air outlet box, a second rotating shaft, a second spiral blade and a second air outlet. The right end of the second air outlet box is connected to the second air inlet box. The second rotating shaft is arranged in the second air outlet box. The second spiral blade is arranged on the second rotating shaft. A plurality of second air outlets are arranged on the second air outlet box.

6. The heat preservation room with a temperature regulating structure according to claim 1, characterized in that: The third air inlet structure includes a third mounting seat, a third air inlet box, a third fan and a third air outlet. The third mounting seat is arranged at the left end of the thermal insulation room, the third air inlet box is arranged on the third mounting seat, the third fan is arranged at the right end of the third air inlet box, and the right end of the third fan is connected to the inside of the thermal insulation room through the third air outlet.

7. The heat preservation room with a temperature regulating structure according to claim 6, characterized in that: The third spiral air outlet structure includes a third air outlet box, a third rotating shaft, a third spiral blade and a third air outlet. The left end of the third air outlet box is connected to the third air inlet box. The third rotating shaft is arranged in the third air outlet box. The third spiral blade is arranged on the third rotating shaft, and a plurality of the third air outlets are arranged on the third air outlet box.

8. The heat preservation room with a temperature regulating structure according to claim 1, characterized in that: The fourth air inlet structure includes a fourth mounting seat, a fourth air inlet box, a fourth fan and a fourth air outlet. The fourth mounting seat is arranged at the right end of the thermal insulation room, the fourth air inlet box is arranged on the fourth mounting seat, the fourth fan is arranged at the left end of the fourth air inlet box, and the left end of the fourth fan is connected to the inside of the thermal insulation room through the fourth air outlet.

9. The heat preservation room with a temperature regulating structure according to claim 8, characterized in that: The fourth spiral air outlet structure includes a fourth air outlet box, a fourth rotating shaft, a fourth spiral blade and a fourth air outlet. The right end of the fourth air outlet box is connected to the fourth air inlet box. The fourth rotating shaft is arranged in the fourth air outlet box. The fourth spiral blade is arranged on the fourth rotating shaft. A plurality of the fourth air outlets are arranged on the fourth air outlet box.

Citation Information

Patent Citations

  • Ventilation and temperature regulation structure of varnished wire workshop

    CN204345859U