The Mystery of Vacuum

Acoustics

★Exhibit Content: Propagation of Sound ★Interaction: Electromechanical Interaction ★Operation: 1. After starting the device, press the "Vacuum" and "Release" buttons in sequence; 2. Observe the changes in the balloon, fan, and bell during the vacuuming and releasing processes. ★Exhibit Description: The platform is equipped with three sets of interactive devices. Inside sealed transparent containers, a bell, a fan, and a balloon are placed respectively, with a vacuum gauge on top. When the visitor presses the vacuum button, the vacuum pump operates, and they will observe that in the vacuum, the bell makes no sound, the fan produces no wind, and the balloon expands. ★Scientific Principle: Sound propagation requires a medium. In a vacuum environment, sound cannot propagate through air vibration, so the vibration of the bell cannot be transmitted to the outside, and the visitor cannot hear the ringing. The working principle of a fan is that the rotating blades push air to flow, thereby generating wind. However, in a vacuum state, even if the fan blades rotate, they cannot push air to flow, so no wind is generated. In a vacuum state, the air pressure inside the container rapidly decreases, while the air pressure outside remains unchanged. Due to the pressure difference, the balloon expands under the external atmospheric pressure.

Options

• Φ1.2*1.1m Φ1.2*1.1m
  Dimensions (unit: m): Φ1.2*1.1m Brand: KexMall Model: PopsciCat-Acoustics-033 1. Materials: ① Platform and base frame: 30 square tube, 2.0mm cold-rolled steel side panels with baked paint finish ② Countertop: Kelesi artificial stone, thickness ≥12mm, with flame-retardant board underneath ③ Instruction sign and graphic panel: acrylic UV printing ④ Maintenance door: 2.0mm cold-rolled steel with baked paint finish ⑤ Vacuum chambers*3: custom steel-protected glass ⑥ Electrical control box: cold-rolled steel with baked paint finish, containing control circuits, switching power supply, circuit breakers, terminal blocks, etc. 2. Main Configuration: ① Electrical control: electrical logic control system, equipped with Guanjian® K1 PLC controller with protection specifically for science exhibits ② Buttons: self-resetting 22mm stainless steel metal buttons with ring lights; LED voltage not exceeding 12V to avoid high-voltage leakage risk; mechanical life: 1 million cycles ③ Demonstration components: fan, balloon, bell ④ Vacuum system: vacuum pump and control system 3. Installation Requirements: ① Power requirement: AC100-240V, 50/60Hz 200W (standard three-wire socket) ② Installation base: place directly ③ Entry passage: door frame dimensions (width × height) ≥1.2m×1.8m, continuous turning interval in passage ≥1.5m ④ Maintenance access: not required

  ★Exhibit Content: Propagation of Sound ★Interaction: Electromechanical Interaction ★Operation: 1. After starting the device, press the "Vacuum" and "Release" buttons in sequence; 2. Observe the changes in the balloon, fan, and bell during the vacuuming and releasing processes. ★Exhibit Description: The platform is equipped with three sets of interactive devices. Inside sealed transparent containers, a bell, a fan, and a balloon are placed respectively, with a vacuum gauge on top. When the visitor presses the vacuum button, the vacuum pump operates, and they will observe that in the vacuum, the bell makes no sound, the fan produces no wind, and the balloon expands. ★Scientific Principle: Sound propagation requires a medium. In a vacuum environment, sound cannot propagate through air vibration, so the vibration of the bell cannot be transmitted to the outside, and the visitor cannot hear the ringing. The working principle of a fan is that the rotating blades push air to flow, thereby generating wind. However, in a vacuum state, even if the fan blades rotate, they cannot push air to flow, so no wind is generated. In a vacuum state, the air pressure inside the container rapidly decreases, while the air pressure outside remains unchanged. Due to the pressure difference, the balloon expands under the external atmospheric pressure.

• 1.4*0.7*1.1m 1.4*0.7*1.1m
  Dimensions (unit: m): 1.4*0.7*1.1m Brand: KexMall Model: PopsciCat-Acoustics-034 1. Materials: ① Platform and base frame: 30 square tube, 2.0mm cold-rolled steel side panels with baked paint finish ② Countertop: Kelesi artificial stone, thickness ≥12mm, with flame-retardant board underneath ③ Instruction sign and graphic panel: acrylic UV printing ④ Maintenance door: 2.0mm cold-rolled steel with baked paint finish ⑤ Vacuum chambers*3: custom steel-protected glass ⑥ Electrical control box: cold-rolled steel with baked paint finish, containing control circuits, switching power supply, circuit breakers, terminal blocks, etc. 2. Main Configuration: ① Electrical control: electrical logic control system, equipped with Guanjian® K1 PLC controller with protection specifically for science exhibits ② Buttons: self-resetting 22mm stainless steel metal buttons with ring lights; LED voltage not exceeding 12V to avoid high-voltage leakage risk; mechanical life: 1 million cycles ③ Demonstration components: fan, balloon, bell ④ Vacuum system: vacuum pump and control system 3. Installation Requirements: ① Power requirement: AC100-240V, 50/60Hz 200W (standard three-wire socket) ② Installation base: place directly ③ Entry passage: door frame dimensions (width × height) ≥1.2m×1.8m, continuous turning interval in passage ≥1.5m ④ Maintenance access: not required

  ★Exhibit Content: Propagation of Sound ★Interaction: Electromechanical Interaction ★Operation: 1. After starting the device, press the "Vacuum" and "Release" buttons in sequence; 2. Observe the changes in the balloon, fan, and bell during the vacuuming and releasing processes. ★Exhibit Description: The platform is equipped with three sets of interactive devices. Inside sealed transparent containers, a bell, a fan, and a balloon are placed respectively, with a vacuum gauge on top. When the visitor presses the vacuum button, the vacuum pump operates, and they will observe that in the vacuum, the bell makes no sound, the fan produces no wind, and the balloon expands. ★Scientific Principle: Sound propagation requires a medium. In a vacuum environment, sound cannot propagate through air vibration, so the vibration of the bell cannot be transmitted to the outside, and the visitor cannot hear the ringing. The working principle of a fan is that the rotating blades push air to flow, thereby generating wind. However, in a vacuum state, even if the fan blades rotate, they cannot push air to flow, so no wind is generated. In a vacuum state, the air pressure inside the container rapidly decreases, while the air pressure outside remains unchanged. Due to the pressure difference, the balloon expands under the external atmospheric pressure.

• 1.2*0.8*1.1m 1.2*0.8*1.1m
  Dimensions (unit: m): 1.2*0.8*1.1m Brand: KexMall Model: PopsciCat-Acoustics-035 1. Materials: ① Platform and base frame: 30 square tube, 2.0mm cold-rolled steel side panels with baked paint finish ② Countertop: Kelesi artificial stone, thickness ≥12mm, with flame-retardant board underneath ③ Instruction sign and graphic panel: acrylic UV printing ④ Maintenance door: 2.0mm cold-rolled steel with baked paint finish ⑤ Vacuum chambers*3: custom steel-protected glass ⑥ Electrical control box: cold-rolled steel with baked paint finish, containing control circuits, switching power supply, circuit breakers, terminal blocks, etc. 2. Main Configuration: ① Electrical control: electrical logic control system, equipped with Guanjian® K1 PLC controller with protection specifically for science exhibits ② Buttons: self-resetting 22mm stainless steel metal buttons with ring lights; LED voltage not exceeding 12V to avoid high-voltage leakage risk; mechanical life: 1 million cycles ③ Demonstration components: fan, balloon, bell ④ Vacuum system: vacuum pump and control system 3. Installation Requirements: ① Power requirement: AC100-240V, 50/60Hz 200W (standard three-wire socket) ② Installation base: place directly ③ Entry passage: door frame dimensions (width × height) ≥1.2m×1.8m, continuous turning interval in passage ≥1.5m ④ Maintenance access: not required

  ★Exhibit Content: Propagation of Sound ★Interaction: Electromechanical Interaction ★Operation: 1. After starting the device, press the "Vacuum" and "Release" buttons in sequence; 2. Observe the changes in the balloon and fan during the vacuuming and releasing processes. ★Exhibit Description: The platform is equipped with 2 sets of interactive devices. Inside sealed transparent containers, a bell and a fan are placed respectively, with a vacuum gauge on top. When the visitor presses the vacuum button, the vacuum pump operates, and they will observe that in the vacuum, the bell makes no sound and the fan produces no wind. ★Scientific Principle: Sound propagation requires a medium. In a vacuum environment, sound cannot propagate through air vibration, so the vibration of the bell cannot be transmitted to the outside, and the visitor cannot hear the ringing. The working principle of a fan is that the rotating blades push air to flow, thereby generating wind. However, in a vacuum state, even if the fan blades rotate, they cannot push air to flow, so no wind is generated.

• 1.2*0.6*2.1m 1.2*0.6*2.1m
  Dimensions (unit: m): 1.2*0.6*2.1m Brand: KexMall Model: PopsciCat-Acoustics-036 1. Materials: ① Platform and base frame: 30 square tube, 2.0mm cold-rolled steel side panels with baked paint finish ② Countertop: Kelesi artificial stone, thickness ≥12mm, with flame-retardant board underneath ③ Instruction sign and graphic panel: 5mm acrylic UV printing ④ Maintenance door: 2.0mm cold-rolled steel with baked paint finish ⑤ Vacuum chambers*3: custom steel-protected glass ⑥ Electrical control box: cold-rolled steel with baked paint finish, containing control circuits, switching power supply, circuit breakers, terminal blocks, etc. 2. Main Configuration: ① Electrical control: electrical logic control system, equipped with Guanjian® K1 PLC controller with protection specifically for science exhibits ② Buttons: self-resetting 22mm stainless steel metal buttons with ring lights; LED voltage not exceeding 12V to avoid high-voltage leakage risk; mechanical life: 1 million cycles ③ Demonstration components: fan, balloon, bell, water flow, balance, rotating ball, Magdeburg hemispheres ④ Vacuum system: vacuum pump and HF-PANDA control system 3. Installation Requirements: ① Power requirement: AC100-240V, 50/60Hz 500W (standard three-wire socket) ② Installation base: place directly ③ Entry passage: door frame dimensions (width × height) ≥1.0m×2.2m, continuous turning interval in passage ≥2.5m ④ Maintenance access: not required

  ★Exhibit Content: Propagation of Sound ★Interaction: Electromechanical Interaction ★Operation: 1. After starting the device, press the "Vacuum" and "Release" buttons in sequence; 2. Observe the changes in the balloon, fan, bell, water flow, balance, rotating ball, and Magdeburg hemispheres during the vacuuming and releasing processes. ★Exhibit Description: The platform is equipped with three sets of interactive devices. Inside sealed transparent containers, a balloon, a fan, a bell, a water flow, a balance, a rotating ball, and Magdeburg hemispheres are placed respectively, with a vacuum gauge on top. When the visitor presses the vacuum button, the vacuum pump operates, and they will observe that in the vacuum, the bell makes no sound, the fan produces no wind, the balloon expands, the water flow changes direction, the balance tilts, the rotating ball stops, and the Magdeburg hemispheres cannot be lifted. ★Scientific Principle: Sound propagation requires a medium. In a vacuum environment, sound cannot propagate through air vibration, so the vibration of the bell cannot be transmitted to the outside, and the visitor cannot hear the ringing. The working principle of a fan is that the rotating blades push air to flow, thereby generating wind. However, in a vacuum state, even if the fan blades rotate, they cannot push air to flow, so no wind is generated. In a vacuum state, the air pressure inside the container rapidly decreases, while the air pressure outside remains unchanged. Due to the pressure difference, the balloon expands under the external atmospheric pressure.

Review

Principle Display: ★★★★ Interaction Effect: ★★★ Ease of Installation: ★★★★★ Durability: ★★★★ Overall Rating: ★★★★

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