Indoor negative pressure prevention system of air compressor

Abstract

The invention relates to the technical field of air compressors, in particular to an air compressor indoor negative pressure prevention system which comprises an air compressor control box, a two-stage adjusting exhaust module and a mixed gas blending module, and the air compressor control box, the two-stage adjusting exhaust module and the mixed gas blending module are all located on the indoor portion of the air compressor. Wherein an exhaust pipeline is arranged at one end of the air compressor control box, and the two-stage adjusting exhaust module is arranged in the exhaust pipeline. The air exhaust mode is intelligently regulated and controlled through the two-stage regulation air exhaust module, natural air introduced from the outside and hot air are mixed and conveyed in combination with the mixed air regulation module, and indoor air pressure unbalance caused by direct exhaust of hot air or indoor temperature unbalance caused by direct introduction of external cold air is avoided; and it is ensured that the air compressor room is always kept in a positive pressure environment while it is avoided that equipment is difficult to operate normally due to imbalance of the indoor environment temperature.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air compressor, in particular to an indoor negative pressure prevention system for air compressor. BACKGROUND

[0002] Air compressor is a kind of widely used mechanical equipment, which is a kind of machinery for compressing gas to improve gas pressure or conveying gas. It is driven by motor to compress the air sucked into the host into high pressure gas, which is delivered to the gas-consuming equipment through the pipeline. It is mainly used for pneumatic valve operation, etc. Air compressor is usually installed in an air compressor room. Air compressor is generally composed of motor and host, which relies on the driving of motor to compress the air sucked into the host. Since the noise is large during the operation of air compressor, in order to reduce the noise, air compressor is usually installed in a control box. However, the host of air compressor will generate a lot of heat during operation, and the motor will also heat up. These heat is trapped in the control box and cannot be dissipated. After a long time, it will cause motor burnout and host failure. Therefore, in order to prevent the control box of air compressor from overheating, a cooling fan is usually installed in the control box of air compressor to blow the heat in the control box to the outside through the air duct. At the same time, a louver is provided at the tail of the control box of air compressor to let fresh air in to form air circulation, so as to achieve the purpose of cooling the air compressor. In addition, during the operation of air compressor, a large amount of air needs to be sucked into the host for compression, and air needs to be supplemented. In the prior art, a cooling fan is installed on the control box of air compressor to take away the heat in the control box of air compressor, so as to achieve the purpose of cooling the air compressor. At the same time, a large amount of air is discharged to the outside, and the air in the air compressor room is rarefied to generate negative pressure. Strong negative pressure makes it difficult for workers to open the door, and it is easy to be injured by the door. Too large negative pressure will also deform and damage the door and window, and even cause glass to burst. At the same time, air compressor relies on air to take away heat. When negative pressure appears in the room, although the temperature in the room is not high, the heat of air compressor cannot be conducted and dissipated through air due to the rarefaction of air, which also increases the temperature of air compressor (motor and air compressor host), affecting the normal operation.

[0003] In order to solve this problem, a 90-degree rotatable valve F1 is usually installed in the indoor section of the air duct. By adjusting the position of valve F1 door plate, the hot air generated by air compressor can be discharged to the room as shown in Figure 1 or discharged to the outside as shown in Figure 2 At the same time, a louver type air inlet is provided below the wall of air compressor room to supplement the outdoor air in time, so as to reduce the influence of indoor negative pressure as much as possible. According to the original design, if the valve F1 is turned to the outdoor exhaust position in the cold north or winter when the outdoor temperature is relatively cold, cold air will directly enter the air compressor room, which will not only reduce the indoor temperature, but also freeze the measuring and protection elements of the air compressor, resulting in the failure of the air compressor. Therefore, the wall louvers below the air compressor room are usually closed in winter, which will lead to only outdoor exhaust without external air supplement, and the negative pressure in the air compressor room will increase; However, if the valve F1 is turned to the indoor exhaust position and the wall louvers are closed, hot air will be exhausted into the air compressor room, which can theoretically reduce the negative pressure, but in fact, the temperature in the air compressor room will rapidly increase, the air compressor will overheat and fail to operate, and other equipment in the room will also be affected. When the valve F1 is turned to the indoor exhaust position and the wall louvers below are opened, the valve F1 provides hot air, and the wall louvers provide cold air. On the surface, the mixture of cold and hot air can solve the problem of negative pressure and adjust the indoor temperature. However, in fact, because the indoor exhaust position and the louver inlet are not in the same position, the cold and hot air cannot be mixed and cannot form convection (cold air at the bottom and hot air at the top), which will lead to uneven temperature distribution in the room, extremely high temperature around the indoor exhaust position, and extremely low temperature around the wall louvers, causing the equipment around the louvers to be frozen and the equipment in other places to overheat, which will also affect the operation of the equipment. SUMMARY

[0004] The present application provides an air compressor room indoor negative pressure prevention system to solve the problem of the traditional indoor design affecting the operation of the equipment and being difficult to effectively solve the problem of air compressor room indoor negative pressure.

[0005] The present application provides an air compressor room indoor negative pressure prevention system, comprising: an air compressor control box provided with an exhaust duct at one end; a two-stage regulation exhaust module arranged inside the exhaust duct, which can regulate and control the exhaust mode of the exhaust duct according to the external demand; a gas mixing module connected to the exhaust duct at one end, which can mix the cold and hot air flowing therein to regulate the temperature of the air flowing into the air compressor room; The air compressor control box, the two-stage regulation exhaust module, and the gas mixing module are all located in the air compressor room.

[0006] Preferably, the two-stage regulation exhaust module comprises a first control valve and a second control valve arranged in linkage; The first control valve is arranged at the indoor input section of the exhaust duct, and has two working positions of outdoor exhaust and indoor exhaust. The second control valve is arranged at the outdoor output section of the exhaust duct, and the second control valve also has two working positions of outdoor exhaust and indoor exhaust.

[0007] Preferably, the air mixing module comprises an air mixer for mixing air and a temperature sensor for monitoring the temperature of air flowing into the air compressor chamber. The inlet of the air mixer is connected with the outside atmosphere, the outlet of the air mixer faces the air compressor chamber, and the air mixer inlet shutter is arranged at the inlet of the air mixer, and the opening and closing degree of the air mixer inlet shutter is adjustable. The temperature sensor is arranged at the outlet of the air mixer.

[0008] Preferably, the air mixer further comprises a cold air channel, a hot air channel and a mixing chamber. The cold air channel is connected with the air mixer inlet shutter, the hot air channel is connected with the exhaust duct, and the mixing chamber is used for mixing cold and hot air flows conveyed by the cold air channel and the hot air channel.

[0009] Preferably, the input end of the hot air channel corresponds to the outdoor exhaust working position of the second control valve, and the second control valve can shield and close the input end of the hot air channel when the second control valve is in the outdoor exhaust working position.

[0010] Preferably, the air compressor control box is internally provided with an air compressor body, one side of the air compressor control box is provided with an air compressor inlet shutter, and the other side is further provided with a cooling fan.

[0011] Preferably, the exhaust mode of the exhaust duct at least comprises: The first control valve and the second control valve are both in the outdoor exhaust working position, the exhaust duct can directly exhaust the hot air blown by the cooling fan to the outside; The first control valve is in the outdoor exhaust working position, the second control valve is in the indoor exhaust working position, the exhaust duct can pass the hot air blown by the cooling fan into the air mixing module for mixing, and then the hot air is conveyed back to the air compressor chamber.

[0012] Preferably, the second control valve is a manually controlled valve, and the double-stage adjusting exhaust module further comprises a mechanical operation hand wheel connected with the second control valve.

[0013] Preferably, the second control valve is an electrically controlled valve, and the double-stage adjusting exhaust module further comprises a remote control device capable of remotely controlling the second control valve.

[0014] Preferably, the air mixing module further comprises a hot air conveying pipe, and the hot air conveying pipe can convey the mixed air flow to the corner position in the air compressor chamber.

[0015] The beneficial effects of this application are as follows: The air compressor indoor anti-negative pressure system of this application intelligently controls the exhaust mode through a two-stage regulating exhaust module, and combines the air mixing and blending module to mix and deliver the externally introduced natural air and hot air, avoiding indoor air pressure imbalance caused by directly exhausting hot air, or indoor temperature imbalance caused by directly introducing external cold air. While avoiding the equipment from failing to operate normally due to indoor environmental temperature imbalance, it ensures that the air compressor room is always maintained in a positive pressure environment. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram showing the position of valve F1 in the external discharge position in the original design of the existing technology. Figure 2 This is a schematic diagram showing the position of valve F1 when it is in the inner row position in the original design of the existing technology. Figure 3 This is a schematic diagram of the external direct exhaust mode of the air compressor indoor anti-negative pressure system provided in the embodiments of this application; Figure 4 This is a schematic diagram of the internal return mode of the air compressor indoor anti-negative pressure system provided in the embodiments of this application; Figure 5 This is a schematic diagram of the overall structure of the mechanical operating handwheel provided in an embodiment of this application.

[0018] Figure label: 100. Air compressor control box; 200. Exhaust duct; 300. First control valve; 400. Second control valve; 410. Drive rocker wheel; 420. Hand crank; 430. Connecting rod; 440. Driven rocker wheel; 450. Rotating shaft; 500. Mixer; 510. Mixer inlet louver; 520. Cold air duct; 530. Hot air duct; 600. Motor; 700. Main unit; 800. Air compressor inlet louver; 900. Cooling fan. Detailed Implementation

[0019] The technical solutions of the present application will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0020] The air compressor room indoor negative pressure prevention system provided in the embodiments of the present application will be described below in combination with Figures 1-5 .

[0021] Referring to Figure 3 , the air compressor room indoor negative pressure prevention system provided in the embodiments of the present application comprises an air compressor control box 100, a double-stage regulation exhaust module and a mixed gas blending module. The air compressor control box 100, the double-stage regulation exhaust module and the mixed gas blending module are all located in the indoor part of the air compressor room. One end of the air compressor control box 100 is provided with an exhaust duct 200. The double-stage regulation exhaust module is arranged in the interior of the exhaust duct 200, and can regulate and control the exhaust mode of the exhaust duct 200 according to the external demand condition. One end of the mixed gas blending module is connected with the exhaust duct 200, and can mix the cold and hot air flows entering therein, so as to regulate and control the temperature of the air flow entering the air compressor room. The double-stage regulation exhaust module intelligently regulates and controls the exhaust mode, and the mixed gas blending module mixes and delivers the natural wind and hot wind introduced from outside, so as to avoid the imbalance of indoor air pressure caused by directly exhausting hot air, or the imbalance of indoor temperature caused by directly introducing cold air from outside. At the same time, the difficulty of normal operation of the equipment caused by the imbalance of indoor environment temperature is avoided, and it is ensured that the air compressor room always maintains in a positive pressure environment.

[0022] Please continue to refer to Figure 4 , which is an external direct exhaust mode schematic diagram of the air compressor room indoor negative pressure prevention system provided in the embodiments of the present application. Figure 4 In some specific embodiments, the interior of the air compressor control box 100 is provided with an air compressor body. One side of the air compressor control box 100 is provided with an air compressor inlet louver 800. The other end of the air compressor control box 100 is further provided with a cooling fan 900 for blowing out the heat in the box.

[0023] ​The air compressor body comprises a motor 600 for driving the air compressor body to operate and a main machine 700 for compressing air. The air compressor inlet shutter 800 is arranged on the side of the air compressor control box 100 close to the motor 600. The output end of the cooling fan 900 is connected to the input end of the exhaust duct 200. The air entering from the air compressor inlet shutter 800 and flowing through the air compressor body is blown out by the cooling fan 900, so that the heat in the air compressor control box 100 is taken out, and the hot air blown out by the cooling fan 900 is transported through the exhaust duct 200 connected to the output end of the cooling fan 900.

[0024] In some embodiments, the double-stage regulation exhaust module comprises a first control valve 300 and a second control valve 400 connected in linkage; The first control valve 300 is arranged in the indoor input section of the exhaust duct 200. The first control valve 300 has two working positions, i.e., an outdoor exhaust position and an indoor exhaust position. The second control valve 400 is arranged in the outdoor output section of the exhaust duct 200, and the second control valve 400 is still located in the indoor part of the air compressor. The second control valve 400 also has two working positions, i.e., an outdoor exhaust position and an indoor exhaust position. The indoor input section of the exhaust duct 200 is the section adjacent to the connection end of the exhaust duct 200 and the cooling fan 900, and the outdoor output section of the exhaust duct 200 is the section adjacent to the output end of the exhaust duct 200 arranged outdoors.

[0025] Please refer again to Figure 3 As shown in Figure 3 The outdoor exhaust position of the first control valve 300 is F1a shown in the figure, and the indoor exhaust position is F1b shown in the figure. The outdoor exhaust position of the second control valve 400 is F2a shown in the figure, and the indoor exhaust position is F2b shown in the figure.

[0026] In some embodiments, the air mixing module comprises an air mixer 500 for mixing air and a temperature sensor for monitoring the temperature of the air flowing into the air compressor room. The inlet of the air mixer 500 is connected to the outside atmosphere, and the outlet of the air mixer 500 faces the air compressor room to deliver the mixed air to the air compressor room. The air mixer inlet shutter 510 is arranged at the inlet of the air mixer 500. The air mixer inlet shutter 510 is an adjustable movable structure. The inlet opening of the air mixer 500 is adjusted to control the amount of cold air entering the air mixer 500. The temperature sensor is arranged at the outlet of the air mixer 500.

[0027] In some embodiments, the air mixer 500 further comprises a cold air channel 520, a hot air channel 530, and a mixing chamber. The cold air passage 520 is connected with the air mixer inlet shutter 510, the hot air passage 530 is connected with the exhaust duct 200, and the mixing chamber is used for mixing the cold and hot air streams delivered by the cold air passage 520 and the hot air passage 530.

[0028] Specifically, the hot air passage 530 connected with the exhaust duct 200 delivers the hot air blown by the cooling fan 900 to the inside of the mixing chamber, and the cold air passage 520 connected with the air mixer inlet shutter 510 delivers the natural air outside to the inside of the mixing chamber. The hot air and the natural air input into the mixing chamber can be fully mixed in the mixing chamber. After the temperature of the mixed air is detected by the temperature sensor to reach the appropriate temperature, the air is delivered through the outlet of the air mixer 500. The detection temperature in the temperature sensor can be adaptively selected and set according to the season outside, for example, the set temperature can be adaptively increased in winter to meet the needs of indoor heating, and the set temperature can be adaptively reduced in spring and autumn to meet the natural needs.

[0029] In some embodiments, the input end of the hot air passage 530 corresponds to the exhaust position of the second control valve 400. When the second control valve 400 is in the exhaust position, the input end of the hot air passage 530 can be shielded and closed.

[0030] Specifically, the input end of the hot air passage 530 is connected with the exhaust duct 200, and the output end of the hot air passage 530 is connected with the air mixer 500.

[0031] In some embodiments, the exhaust mode of the exhaust duct 200 at least includes: The external direct exhaust mode, the first control valve 300 and the second control valve 400 are both in the exhaust position, and the exhaust duct 200 can directly exhaust the hot air blown by the cooling fan 900 to the outside; The internal return mode, the first control valve 300 is in the exhaust position, the second control valve 400 is in the internal exhaust position, and the exhaust duct 200 can deliver the hot air blown by the cooling fan 900 into the air mixing and blending module for mixing and then delivering back to the air compressor chamber.

[0032] Specifically, the double-stage regulation exhaust module can select the corresponding exhaust mode according to the current operating season or the actual outdoor environment condition, so as to ensure that the temperature in the air compressor room is within the normal operating temperature range of the equipment and avoid the occurrence of negative pressure in the room. For example, when operating in winter or in a cold state where the actual outdoor environment condition is relatively cold, the double-stage regulation exhaust module can control the first control valve 300 to switch to the external exhaust position and the second control valve 400 to switch to the internal exhaust position, so that the internal backflow mode is adopted. The hot air blown out of the air compressor control box 100 enters the air mixer 500 and mixes with the cold air outside, and then is sent back to the room, so as to avoid the occurrence of negative pressure in the room and provide appropriate heating for the room to avoid the influence of the low temperature in the room on the operation of the equipment. When it is not winter or the actual outdoor environment condition is relatively mild, the double-stage regulation exhaust module can control the first control valve 300 and the second control valve 400 to switch to the external exhaust position, so that the external direct exhaust mode is adopted, and the hot air is directly exhausted to the outside. The exhaust mode of the exhaust duct 200 can also include the traditional mode in which the first control valve 300 is in the internal exhaust position, so as to adapt to different operating requirements.

[0033] Please continue to refer to Figure 5 As Figure 5 shown, it is a whole structure schematic diagram of a mechanical operation hand wheel provided by the embodiment of the application. In some specific embodiments, the second control valve 400 is a manually controlled valve, and the double-stage regulation exhaust module further includes a mechanical operation hand wheel connected to the second control valve 400.

[0034] Specifically, the mechanical operation hand wheel can include a driving rotary wheel 410, a driven rotary wheel 440, and a connecting rod 430. One side of the driving rotary wheel 410 is provided with a hand crank 420 for controlling the rotation of the driving rotary wheel 410. The end of the driving rotary wheel 410 away from the hand crank 420 is connected to the driven rotary wheel 440 through the connecting rod 430. One side of the driven rotary wheel 440 is also provided with a rotating shaft 450. The driven rotary wheel 440 is connected to the valve leaf of the second control valve 400 through the rotating shaft 450. The hand crank can drive the driving rotary wheel to rotate, and then the connecting rod can drive the driven rotary wheel to rotate, so as to control the second control valve 400 to rotate between the external exhaust position and the internal exhaust position and control the actual opening degree.

[0035] In some specific embodiments, the second control valve 400 is an electrically controlled valve, which can be controlled remotely. The double-stage regulation exhaust module further includes a remote control device for remotely controlling the second control valve 400. It can be any one of the common valves and corresponding remote control devices on the market that can be controlled by a remote control device, and will not be described here.

[0036] In some embodiments, the air mixing module further comprises a hot air delivery pipe configured to deliver the mixed air flow to a corner position in the air compressor chamber.

[0037] Specifically, the hot air delivery pipe is connected to the outlet end of the air mixer 500, and the hot air delivery pipe comprises a plurality of delivery ports respectively distributed at corresponding corner positions in the air compressor chamber to deliver the mixed hot air to each corner in the chamber, thereby balancing the air pressure in the chamber to eliminate the risk of local negative pressure and enhancing the heating efficiency of the chamber in the internal return mode.

[0038] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0039] In addition, the terms "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0040] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected or can communicate with each other; can be directly connected, or can be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0041] In this application, the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" mean that a particular feature, structure, material, or characteristic is included in at least one embodiment or example of the present application. The illustrative appearances of the above-mentioned terms in various places in the specification are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples. Moreover, the terms "first", "second", "third", etc. are used herein to describe various embodiments or examples and are not necessarily intended to denote a particular order, position, or priority of the elements being described. In addition, the terms "comprises", "comprising", "includes", "including", "has", "having", "contains", "containing", or any other similar word(s), are intended to be inclusive or open ended and not restrictive or exhaustive. In other words, the terms "comprises", "comprising", "includes", "including", "has", "having", "contains", "containing", or any other similar word(s), are intended to cover a special embodiment or example, but not exclude other embodiments or examples. In addition, the terms "an" and "one" are intended to be inclusive or open ended and not restrictive or exhaustive. In other words, the terms "an" and "one" are intended to cover both the singular aspect and the plural aspect, unless the context clearly indicates otherwise.

[0042] Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary, and are not to be interpreted as limiting the present application, and that the ordinary skilled person in the art can make changes, modifications, replacements, and variations to the above-described embodiments within the scope of the present application.

Claims

1. An indoor negative pressure prevention system for an air compressor, characterized in that, include: The air compressor control box has an exhaust duct at one end; A two-stage adjustable exhaust module is installed inside the exhaust duct, which can adjust the exhaust mode of the exhaust duct according to external needs; The air mixing module, one end of which is connected to the exhaust duct, can mix the hot and cold airflows introduced into it in order to regulate the temperature of the airflow entering the air compressor chamber. The air compressor control box, the two-stage regulating exhaust module, and the air mixing and blending module are all located inside the air compressor room.

2. The air compressor indoor negative pressure prevention system according to claim 1, characterized in that, The dual-stage regulating exhaust module includes a first control valve and a second control valve that are linked together. The first control valve is located in the indoor input section of the exhaust duct, and the first control valve has two positions: external exhaust and internal exhaust. The second control valve is located in the outdoor output section of the exhaust duct, and the second control valve also has two positions: external exhaust and internal exhaust.

3. The air compressor indoor negative pressure prevention system according to claim 2, characterized in that, The gas mixing module includes a gas mixer for mixing gases and a temperature sensor for monitoring the temperature of the airflow entering the air compressor chamber. The air mixer has an inlet that is open to the outside atmosphere and an outlet that faces the air compressor room. The air mixer is also equipped with an inlet louver, and the opening degree of the inlet louver is adjustable. The temperature sensor is located at the outlet of the gas mixer.

4. The air compressor indoor anti-negative pressure system according to claim 3, characterized in that, The air mixer also includes a cold air passage, a hot air passage, and a mixing chamber; The cold air duct is connected to the inlet louver of the mixer, the hot air duct is connected to the exhaust duct, and the mixing chamber is used to mix the cold and hot air flows delivered by the cold air duct and the hot air duct.

5. The air compressor indoor negative pressure prevention system according to claim 4, characterized in that, The input end of the hot air channel corresponds to the exhaust position of the second control valve. When the second control valve is in the exhaust position, it can block and close the input end of the hot air channel.

6. The air compressor indoor negative pressure prevention system according to claim 5, characterized in that, The air compressor control box contains the air compressor body. One side of the air compressor control box has an air compressor inlet louver, and the other side has a cooling fan.

7. The air compressor indoor negative pressure prevention system according to claim 6, characterized in that, The exhaust modes of the exhaust duct include at least the following: In the external direct exhaust mode, both the first control valve and the second control valve are in the external exhaust position, and the exhaust duct can directly exhaust the hot air blown out by the cooling fan to the outside. In the internal return mode, the first control valve is in the external discharge position and the second control valve is in the internal discharge position. The exhaust duct can guide the hot air blown out by the cooling fan into the mixing and blending module for mixing, and then send it back to the air compressor room.

8. The air compressor indoor negative pressure prevention system according to claim 2, characterized in that, The second control valve is a manually controlled valve, and the two-stage regulating exhaust module also includes a mechanical operating handwheel connected to the second control valve.

9. The air compressor indoor negative pressure prevention system according to claim 2, characterized in that, The second control valve is an electrically controlled valve, and the two-stage regulating exhaust module also includes a remote control device that can remotely control the second control valve.

10. The air compressor indoor negative pressure prevention system according to claim 1, characterized in that, The air mixing module also includes a hot air delivery pipe, which can deliver the mixed airflow to a corner of the air compressor room.

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