Energy-saving air supply fume hood

Abstract

The present invention discloses an energy-saving air supply fume hood, which relates to the technical field of air supply fume hoods, and includes: a cabinet, an operating table is arranged in the cabinet, a perspective window and a movable sliding window are arranged in the cabinet and on the front wall of the operating table, a movable air curtain is fixedly arranged at the bottom of the movable sliding window, the movable air curtain follows the movable sliding window and slides vertically along the cabinet, and the air supply direction of the movable air curtain is vertically downward, which is used to separate the internal space of the cabinet from the external space of the cabinet. The present invention performs synchronous air supply by setting a movable air curtain and an air supply port, the movable air curtain generates gas at the lower edge of the movable sliding window, and releases the air curtain downward, which separates the internal space of the cabinet from the external space of the cabinet, and at the same time, the air supply direction of the air supply port is toward the inside of the cabinet, and the air supply direction of the air supply port intersects with the air curtain, thereby ensuring a relatively stable air flow state in the working space of the cabinet, and reducing the probability of leakage of harmful gases.

Description

Technical Field

[0001] The invention relates to the technical field of air supply fume hoods, and in particular to an energy-saving air supply fume hood. Background Art

[0002] In the laboratory, various flammable, explosive, corrosive or toxic substances are produced during experimental operations. In order to protect the safety of operators and prevent the spread of pollutants in the experiment, fume hoods are required in the laboratory. As a common exhaust equipment in the laboratory, fume hoods usually not only need to remove pollutants in the experiment, but also need to cooperate with the air intake system in the laboratory to form good ventilation in the laboratory.

[0003] At present, most of the fume hoods commonly used in laboratories adopt an air supply structure, that is, by setting an air supply port from the top or bottom of the cabinet, and then obtaining fresh air from the outside through the air supply duct system to input into the working space of the fume hood. This structure does reduce the air conditioning energy consumption of the building to a certain extent. However, a simple air supply device cannot guarantee a relatively stable air flow state in the working space of the ventilation equipment. There is still the problem of spillover of harmful substances caused by turbulence and turbulence, and the noise of the air supply channel is very large, which reduces the comfort of the indoor environment where the ventilation equipment is located, and there is still a hidden danger of harming the health of indoor workers. In addition, when multiple sets of air supply ventilation equipment are used in parallel indoors on the current market, the flow of its air supply system and exhaust system cannot be individually controlled and adjusted according to the actual working conditions of a single set of equipment. There is no precise control module, and there is no linkage between air supply and exhaust control. Once the exhaust system fails, the exhaust stops working, and the air supply is still in progress, which increases the power consumption of the air supply system and the exhaust system, and does not save energy. It even causes the risk of air leakage in the working space, and the exhaust cabinet becomes a dangerous cabinet.

[0004] Currently, no effective solution has been proposed for the problems in the related technologies. Summary of the invention

[0005] In view of the problems in the related art, the present invention proposes an energy-saving air supply fume hood to overcome the above-mentioned technical problems existing in the existing related art.

[0006] The technical solution of the present invention is achieved in this way:

[0007] An energy-saving air supply fume hood comprises: a cabinet, an operating table is arranged in the cabinet, a perspective window and a movable sliding window are respectively arranged on the cabinet and the front wall of the operating table, a movable air curtain is fixedly arranged at the bottom of the movable sliding window, the movable air curtain follows the movable sliding window and slides vertically along the cabinet, and the air supply direction of the movable air curtain is vertically downward, which is used to separate the internal space of the cabinet from the external space of the cabinet, and the two side walls of the cabinet are respectively provided with adaptive air supply ports, the air supply direction of the air supply ports is toward the inside of the cabinet, which is used to prevent the air supply of the movable air curtain from generating gas vortex, and a guide plate is arranged on the cabinet and the rear wall of the operating table, a flow channel is formed between the guide plate and the cabinet, and the flow channel is located at the top of the cabinet and an exhaust port is arranged, wherein;

[0008] The cabinet is provided with a control module, a human body sensing module for real-time acquisition of human body approach signals, a displacement sensing module for real-time acquisition of mobile air curtain displacement signals, an exhaust fan and a supply air fan, respectively. The human body sensing module, the displacement sensing module, the exhaust fan and the supply air fan are electrically connected to the control module respectively, the output end of the supply air fan is connected to the supply air port and the mobile air curtain respectively, the exhaust fan is connected to the exhaust air port, and the control module is used to respectively obtain the mobile air curtain displacement signal and the human body approach signal of the human body sensing module to regulate the output power of the exhaust fan, the supply air fan and the mobile air curtain, wherein at least it includes: the greater the opening and closing degree of the mobile air curtain obtained by the control module, the greater the output power of the exhaust fan, the supply air fan and the mobile air curtain is regulated, and the smaller the opening and closing degree of the mobile air curtain obtained by the control module, the smaller the output power of the exhaust fan, the supply air fan and the mobile air curtain is regulated.

[0009] Furthermore, the human body sensing module is installed in the perspective window, and the human body sensing module is used to collect the approach signal of the human body approaching the perspective window in real time, and transmit the approach signal to the control module.

[0010] Furthermore, the displacement sensing module is mounted on the bottom of the movable sliding window and located on one side of the movable wind curtain, and the displacement sensing module is used to collect displacement signals of the movable sliding window and the movable wind curtain in real time, and transmit the displacement signals to the control module.

[0011] Furthermore, the air supply fan is installed inside the top of the cabinet, and the air supply fan is connected to the air supply port and the movable air curtain respectively through an air supply duct.

[0012] Furthermore, the exhaust fan is installed in the exhaust port, and the exhaust fan is used to communicate with the exhaust port and the flow channel respectively.

[0013] Furthermore, the control module is used to respectively obtain the displacement signal of the mobile wind curtain and the human body approach signal of the human body sensor module to adjust the output power of the exhaust fan and the supplementary air fan, including the following steps:

[0014] Step S1, the human body sensing module collects a human body approaching signal in advance and transmits the human body approaching signal to the control module;

[0015] Step S2, the control module obtains a human body approach signal and compares it with a preset approach value. If the human body approach signal is less than the preset approach value, it indicates that the current state is an experimental state, which includes the following steps:

[0016] In step S21, the control module regulates the movable sliding window to link with the movable air curtain to rise to a preset first height, and increases the output power of the air supply fan and the exhaust fan to a preset first stable value.

[0017] Furthermore, the control module regulates the movable sliding window to move the movable air curtain to rise to a preset first height, including the following steps:

[0018] Step S22, the control module obtains the console operation signal, which includes:

[0019] Step S2201: if the control module obtains the operation signal of the operation console within the current preset period, the current state is the operation state, and the output power of the air supply fan, the exhaust fan and the movable air curtain is adjusted to a preset first stable value;

[0020] Step S2202, if the control module does not obtain the operation signal from the operating console within the current preset period, the current state is observation state, the control module regulates the movable sliding window to link the movable air curtain to descend to the preset second height, and the control module reduces the output power of the air supply fan, the exhaust fan and the movable air curtain to the preset second stable value.

[0021] Furthermore, an electric telescopic cylinder is provided in the movable sliding window, and the electric telescopic cylinder is electrically connected to the control module.

[0022] Furthermore, an ultrasonic sensor is provided in the cabinet and at the top of the operating table. The ultrasonic sensor is electrically connected to the control module, and the ultrasonic sensor is used to obtain the operation signal of the current operating table in real time.

[0023] Beneficial effects of the present invention:

[0024] 1. The present invention performs synchronous air supply by arranging a movable air curtain and an air supply port. The movable air curtain generates gas at the lower edge of the movable sliding window, and releases the air curtain downward to separate the internal space of the cabinet from the external space of the cabinet, so that the gas inside the cabinet is discharged out of the cabinet through the exhaust port, and the gas outside the cabinet is blocked by the air curtain, thereby protecting the safety of operators and indoor space, and at the same time compensating for the indoor gas taken away by the exhaust air, thereby saving energy consumption; at the same time, the air supply direction of the air supply port is toward the inside of the cabinet, and the intersection of the air supply direction of the air supply port and the air curtain can not only prevent the air supply of the movable air curtain from generating gas vortex, but also reduce the turbulence or turbulence of the air flow in the cabinet, thereby ensuring a relatively stable air flow state in the working space in the cabinet and reducing the probability of leakage of harmful gases.

[0025] 2. The movable air curtain of the present invention can move up and down following the movable sliding window, and the wind speed changes with the position of the movable sliding window. The greater the opening and closing degree of the movable air curtain, the greater the output power of the exhaust fan, the air supply fan and the movable air curtain is regulated, and the smaller the opening and closing degree of the movable air curtain, the smaller the output power of the exhaust fan, the air supply fan and the movable air curtain is regulated, thereby improving the energy-saving performance of the cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 The invention is a block diagram of an energy-saving air supply fume hood according to an embodiment of the present invention.

[0028] In the figure:

[0029] 1. Cabinet; 2. Operation table; 3. Perspective window; 4. Movable sliding window; 5. Movable air curtain; 6. Air supply port; 7. Guide plate; 8. Flow channel; 9. Exhaust port; 10. Control module; 11. Human body sensor module; 12. Displacement sensor module; 13. Exhaust fan; 14. Air supply fan. DETAILED DESCRIPTION

[0030] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0031] According to an embodiment of the present invention, an energy-saving air supply fume hood is provided.

[0032] like Figure 1 As shown, the energy-saving air supply fume hood according to the embodiment of the present invention comprises: a cabinet 1, an operating table 2 is arranged in the cabinet 1, a perspective window 3 and a movable sliding window 4 are respectively arranged on the cabinet 1 and the front wall of the operating table 2, a movable air curtain 5 is fixedly arranged at the bottom of the movable sliding window 4, the movable air curtain 5 follows the movable sliding window 4 to slide vertically along the cabinet 1, and the air supply direction of the movable air curtain 5 is vertically downward, which is used to separate the internal space of the cabinet 1 from the external space of the cabinet 1, and the two side walls of the cabinet 1 are respectively provided with adaptive air supply ports 6, and the air supply direction of the air supply port 6 is toward the inside of the cabinet 1, which is used to prevent the air supply of the movable air curtain 5 from generating gas vortex, and a guide plate 7 is arranged on the cabinet 1 and the rear wall of the operating table 2, and a flow channel 8 is formed between the guide plate 7 and the cabinet 1, and the flow channel 8 is located at the top of the cabinet 1 and an exhaust port 9 is arranged, wherein;

[0033] The cabinet 1 is provided with a control module 10, a human body sensor module 11 for real-time acquisition of human body approach signals, a displacement sensor module 12 for real-time acquisition of displacement signals of the mobile air curtain 5, an exhaust fan 13 and a make-up fan 14. The human body sensor module 11, the displacement sensor module 12, the exhaust fan 13 and the make-up fan 14 are electrically connected to the control module 10 respectively, the output end of the make-up fan 14 is connected to the make-up air port 6 and the mobile air curtain 5 respectively, the exhaust fan 13 is connected to the exhaust port 9, and the control module 10 It is used to respectively obtain the displacement signal of the mobile wind curtain 5 and the human body approach signal of the human body sensor module 11 to adjust the output power of the exhaust fan 13, the air supply fan 14 and the mobile wind curtain 5, wherein at least it includes: the greater the opening and closing degree of the mobile wind curtain 5 obtained by the control module 10, the greater the output power of the exhaust fan 13, the air supply fan 14 and the mobile wind curtain 5 is adjusted, and the smaller the opening and closing degree of the mobile wind curtain 5 obtained by the control module 10, the smaller the output power of the exhaust fan 13, the air supply fan 14 and the mobile wind curtain 5 is adjusted.

[0034] The human body sensing module 11 is installed in the perspective window 3 , and is used to collect approach signals of a human body approaching the perspective window 3 in real time, and transmit the approach signals to the control module 10 .

[0035] The displacement sensing module 12 is mounted at the bottom of the movable sliding window 4 and located on one side of the movable wind curtain 5 , and the displacement sensing module 12 is used to collect displacement signals of the movable sliding window 4 and the movable wind curtain 5 in real time, and transmit the displacement signals to the control module 10 .

[0036] The air supply fan 14 is installed inside the top of the cabinet 1, and the air supply fan 14 is connected to the air supply port 6 and the movable air curtain 5 through the air supply duct.

[0037] The exhaust fan 13 is installed in the exhaust port 9, and the exhaust fan 13 is used to communicate with the exhaust port 9 and the flow channel 8 respectively.

[0038] In addition, the control module 10 is used to obtain the displacement signal of the mobile air curtain 5 and the human body approaching signal of the human body sensor module 11 to adjust the output power of the exhaust fan 13 and the supplementary air fan 14, including the following steps:

[0039] Step S1, the human body sensor module 11 collects a human body approach signal in advance and transmits the human body approach signal to the control module 10;

[0040] Step S2, the control module 10 obtains a human body approach signal and compares it with a preset approach value. If the human body approach signal is less than the preset approach value, it indicates that the current state is an experimental state, which includes the following steps:

[0041] In step S21, the control module 10 regulates the movable sliding window 4 to link with the movable air curtain 5 to rise to a preset first height, and increases the output power of the supply air fan 14, the exhaust air fan 13 and the movable air curtain 5 to a preset first stable value.

[0042] The control module 10 regulates the movable sliding window 4 to move the movable air curtain 5 to rise to a preset first height, including the following steps:

[0043] Step S22, the control module 10 obtains the operation signal of the operation console 2, which includes:

[0044] Step S2201: if the control module 10 obtains the operation signal of the operation console 2 within the current preset period, the current state is the operation state, and the output power of the supply fan 14, the exhaust fan 13 and the movable air curtain 5 is adjusted to a preset first stable value;

[0045] Step S2202, if the control module 10 does not obtain the operation signal of the operating console 2 within the current preset period, the current state is observation state, the control module 10 regulates the movable sliding window 4 to link the movable air curtain 5 to descend to the preset second height, and the control module 10 reduces the output power of the supply air fan 14, the exhaust fan 13 and the movable air curtain 5 to the preset second stable value.

[0046] The movable sliding window 4 is provided with an electric telescopic cylinder, and the electric telescopic cylinder is electrically connected to the control module 10. An ultrasonic sensor is provided in the cabinet 1 and at the top of the operating table 2, and the ultrasonic sensor is electrically connected to the control module 10, and the ultrasonic sensor is used to obtain the operation signal of the current operating table 2 in real time.

[0047] Specifically, for the above-mentioned experimental state, the first height can be preset as an operating height of 0.5m, and the control module 10 regulates the movable sliding window 4 to link the movable air curtain 5 to rise to an operating height of 0.5m; at the same time, the output power of the air supply fan 14, the exhaust fan 13 and the movable air curtain 5 increases to a preset first stable value, reaching a stable state, and starting the experimental state.

[0048] In addition, for the above-mentioned observation state, the second height can be preset at a height of 0.2m, and the control module 10 regulates the movable sliding window 4 to link the movable air curtain 5 to descend to a preset height of 0.2m. At the same time, the output power of the supply air fan 14 and the exhaust fan 13 decreases with the movable air curtain 5, and the output power of the exhaust fan 13 reaches the minimum value, and the supply air volume of the supply air fan 14 and the movable air curtain 5 also decreases until it reaches zero.

[0049] In addition, the technical solution provides synchronous air supply by setting up a movable wind curtain 5 and an air supply port 6, and the movable wind curtain 5 follows the movable sliding window 4 to slide vertically along the cabinet 1, and the air supply direction of the movable wind curtain 5 is vertically downward, which is used to separate the internal space of the cabinet 1 from the external space of the cabinet 1, and the two side walls of the cabinet 1 are respectively provided with adaptive air supply ports 6, and the air supply direction of the air supply ports 6 is toward the inside of the cabinet 1, which is used to prevent the air supply of the movable wind curtain 5 from generating gas vortices, and the air is discharged to the exhaust port 9 through the flow channel 8.

[0050] Specifically, the movable air curtain 5 generates gas at the lower edge of the movable sliding window 4, and releases the air curtain downward to separate the internal space of the cabinet 1 from the external space of the cabinet 1, so that the internal gas of the cabinet 1 is discharged outside the cabinet 1 through the exhaust port 9, and the external gas of the cabinet 1 is blocked by the air curtain, thereby protecting the safety of the operators and the indoor space, and at the same time compensating for the indoor gas taken away by the exhaust, thereby saving energy consumption.

[0051] In addition, the air supply direction of the air supply port 6 is toward the inside of the cabinet 1. The intersection of the air supply direction of the air supply port 6 and the wind curtain can not only prevent the air supply of the movable wind curtain 5 from generating gas vortices, but also reduce the turbulence or turbulence of the air flow in the cabinet 1, thereby ensuring a relatively stable air flow state in the working space in the cabinet 1 and reducing the probability of leakage of harmful gases.

[0052] In addition, the movable air curtain 5 can move up and down with the movable sliding window 4, and the wind speed changes with the position of the movable sliding window 4. When the opening and closing degree of the movable air curtain 5 is larger, the output power of the exhaust fan 13, the air supply fan 14 and the movable air curtain 5 is larger, and when the opening and closing degree of the movable air curtain 5 is smaller, the output power of the exhaust fan 13, the air supply fan 14 and the movable air curtain 5 is smaller, thereby improving the energy-saving performance of the cabinet 1.

[0053] In addition, specifically, when in use, the guide plate 7 discharges the internal gas of the cabinet 1 through the flow channel 8, away from the operating table 2, to prevent the diffusion of harmful gases. At the same time, the exhaust port 9 structure can adopt a funnel-shaped structure. The exhaust port 9 located at the inner end surface of the cabinet 1 can adopt a rectangular structure to increase the exhaust inflow area, and the exhaust port 9 located at the outer end surface of the cabinet 1 can adopt a circular structure, which is convenient for connection with the exhaust duct and improves the exhaust performance of the cabinet 1.

[0054] In summary, with the aid of the above-mentioned technical scheme of the present invention, synchronous air supply is carried out by setting up a movable wind curtain 5 and an air supply port 6, and the movable wind curtain 5 generates gas at the lower edge of the movable sliding window 4, and releases the wind curtain downward, thereby separating the internal space of the cabinet 1 from the external space of the cabinet 1, so that the internal gas of the cabinet 1 is discharged outside the cabinet 1 through the exhaust port 9, and the external gas of the cabinet 1 is blocked by the wind curtain, so as to protect the safety of the operator and the indoor space, and at the same time make up for the indoor gas taken away by the exhaust air, thereby saving energy consumption; at the same time, the air supply direction of the air supply port 6 is toward the inside of the cabinet 1, and the intersection of the air supply direction of the air supply port 6 and the wind curtain can not only prevent the mobile wind curtain 5 from generating gas vortices, but also reduce the turbulence or turbulence of the air flow in the cabinet 1, thereby ensuring a relatively stable air flow state in the working space in the cabinet 1 and reducing the probability of leakage of harmful gases.

[0055] In addition, the movable air curtain 5 of the present invention can move up and down following the movable sliding window 4, and the wind speed changes with the position of the movable sliding window 4. When the opening and closing degree of the movable air curtain 5 is larger, the output power of the exhaust fan 13, the air supply fan 14 and the movable air curtain 5 is larger, and when the opening and closing degree of the movable air curtain 5 is smaller, the output power of the exhaust fan 13, the air supply fan 14 and the movable air curtain 5 is smaller, thereby improving the energy-saving performance of the cabinet 1.

[0056] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. After considering the disclosure of the specification and the examples, those skilled in the art will easily think of other embodiments of the present disclosure. This application is intended to cover any modification, use or adaptation of the present disclosure, which follows the general principles of the present disclosure and includes common knowledge or customary technical means in the art that are not disclosed in the present disclosure. The specification and the examples are only regarded as exemplary, and the true scope and spirit of the present disclosure are indicated by the claims.

[0057] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. An energy-saving air supply fume hood, comprising: A cabinet (1), wherein an operating table (2) is provided in the cabinet (1), and a perspective window (3) and a movable sliding window (4) are provided on the front wall of the cabinet (1) and the movable sliding window (4), characterized in that a movable air curtain (5) is fixedly provided at the bottom end of the movable sliding window (4), and the movable air curtain (5) follows the movable sliding window (4) to slide vertically along the cabinet (1), and the air supply direction of the movable air curtain (5) is vertically downward, so as to connect the internal space of the cabinet (1) with the cabinet (1) The cabinet (1) is separated from the external space, and the two side walls of the cabinet (1) are respectively provided with adapted air supply ports (6), and the air supply direction of the air supply ports (6) is toward the inside of the cabinet (1), so as to prevent the air supply of the movable air curtain (5) from generating gas vortices, and the cabinet (1) is provided with a guide plate (7) on the rear wall of the operating table (2), and a flow channel (8) is formed between the guide plate (7) and the cabinet (1), and the flow channel (8) is provided with an exhaust port (9) at the top of the cabinet (1), wherein; The cabinet (1) is provided with a control module (10), a human body sensor module (11) for real-time acquisition of human body approach signals, a displacement sensor module (12) for real-time acquisition of displacement signals of the movable air curtain (5), an exhaust fan (13) and a supply air fan (14). The human body sensor module (11), the displacement sensor module (12), the exhaust fan (13) and the supply air fan (14) are respectively electrically connected to the control module (10). The output end of the supply air fan (14) is respectively connected to the supply air port (6) and the movable air curtain (5). The exhaust fan (13) is connected to the exhaust port (9). ), and the control module (10) is used to respectively obtain the displacement signal of the movable air curtain (5) and the human body approach signal collected by the human body sensor module (11) to adjust the output power of the exhaust fan (13) and the supply air fan (14), wherein at least the following is included: the greater the opening and closing degree of the movable air curtain (5) obtained by the control module (10), the greater the output power of the exhaust fan (13) and the supply air fan (14) is adjusted, and the smaller the opening and closing degree of the movable air curtain (5) obtained by the control module (10), the smaller the output power of the exhaust fan (13) and the supply air fan (14) is adjusted; The movable sliding window (4) is provided with an electric telescopic cylinder, and the electric telescopic cylinder is electrically connected to the control module (10); an ultrasonic sensor is provided in the cabinet (1) and at the top of the operating table (2); the ultrasonic sensor is electrically connected to the control module (10), and the ultrasonic sensor is used to obtain an operation signal of the current operating table (2) in real time; The control module (10) is used to respectively obtain the displacement signal of the movable air curtain (5) and the human body approach signal collected by the human body sensor module (11) to adjust the output power of the exhaust fan (13) and the air supply fan (14), and comprises the following steps: The human body sensing module (11) collects a human body approaching signal in advance and transmits the human body approaching signal to the control module (10); The control module (10) obtains a human body approach signal and compares it with a preset approach value. If the human body approach signal is less than the preset approach value, it indicates that the current state is an experimental state, which includes the following steps: The control module (10) regulates the movable sliding window (4) to move in conjunction with the movable air curtain (5) to rise to a preset first height, and increases the output power of the air supply fan (14) and the exhaust fan (13) to a preset first stable value; The control module (10) controls the movable sliding window (4) to move the movable air curtain (5) upward to a preset first height, comprising the following steps: The control module (10) obtains an operation signal from the operating console (2), which includes: If the control module (10) obtains an operation signal from the operating console (2) within the current preset period, the current state is an operation state, and the output power of the supply fan (14) and the exhaust fan (13) is regulated to a preset first stable value; If the control module (10) does not obtain an operation signal from the operating console (2) within the current preset period, the current state is an observation state, the control module (10) controls the movable sliding window (4) to link with the movable air curtain (5) to descend to a preset second height, and the control module (10) reduces and controls the output power of the supply air fan (14) and the exhaust fan (13) to a preset second stable value.

2. The energy-saving air supply fume hood according to claim 1 is characterized in that: The human body sensing module (11) is mounted in the perspective window (3), and the human body sensing module (11) is used to collect in real time an approach signal of a human body approaching the perspective window (3), and transmit the approach signal to the control module (10).

3. The energy-saving air supply fume hood according to claim 2 is characterized in that: The displacement sensing module (12) is mounted on the bottom end of the movable sliding window (4) and is located on one side of the movable wind curtain (5), and the displacement sensing module (12) is used to collect displacement signals of the movable sliding window (4) and the movable wind curtain (5) in real time, and transmit the displacement signals to the control module (10).

4. The energy-saving air supply fume hood according to claim 1 is characterized in that: The air supply fan (14) is installed inside the top of the cabinet (1), and the air supply fan (14) is connected to the air supply port (6) and the movable air curtain (5) respectively through an air supply duct.

5. The energy-saving air supply fume hood according to claim 4 is characterized in that: The exhaust fan (13) is installed in the exhaust port (9), and the exhaust fan (13) is used to communicate with the exhaust port (9) and the flow channel (8) respectively.

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