A stoichiometric laboratory ventilation system with heat exchange device

Abstract

The application belongs to the technical field of laboratory ventilation, and particularly relates to a stoichiometric laboratory ventilation system with a heat exchange device, which comprises a ventilation box, an air inlet pipe fixed to the upper end of the left wall of the ventilation box, a square pipe penetrating through the left end of the ventilation box and being in communication with the air inlet pipe, a water tank arranged at the left end in the ventilation box, a water inlet pipe with a valve arranged on the top surface of the ventilation box, a water outlet pipe with a valve arranged on the lower end of the front wall of the ventilation box, a liquid level observation hole arranged on the front wall of the ventilation box, two air outlet pipes in a central symmetrical structure and being in communication with the lower end in the ventilation box, a heat exchange assembly arranged at the right end in the ventilation box, and an air exhaust fan in communication with the right end of the air outlet pipe arranged at the right end. The stoichiometric laboratory ventilation system is provided with the heat exchange function, the residence time of the discharged air is prolonged, the air transported from the outdoor to the indoor is conveniently preheated, the heating efficiency of the heat exchange is improved, the temperature difference is reduced, and the influence on the stoichiometric laboratory measurement is reduced.

Description

Technical Field

[0001] This invention relates to the field of laboratory ventilation technology, and more particularly to a ventilation system for a chemical metrology laboratory with a heat exchange device. Background Technology

[0002] A chemistry laboratory is a crucial facility providing conditions for chemical experiments and scientific research. It contains numerous instruments, including iron stands, asbestos mesh, and alcohol lamps. The laboratory ventilation system significantly impacts the laboratory environment, the health of laboratory personnel, and the operation and maintenance of equipment. Current chemical metrology laboratories require strict temperature control of the ventilation system, especially in winter. Low-temperature outdoor air is directly supplied to the laboratory, causing significant temperature fluctuations that can severely affect the accuracy of metrological measurements. Therefore, heat exchange is often achieved through a heat exchange core within the ventilation system. However, the heat exchange core has a short duct, resulting in a short residence time of heat from the exhausted air. This prevents rapid preheating of the outdoor air during heat exchange, leading to low heating efficiency and negatively impacting the effectiveness of the heat exchange process. Summary of the Invention

[0003] 1. Technical problems to be solved

[0004] Based on the existing ventilation systems that use heat exchange cores for heat exchange, which have short ducts and short residence time of heat in the exhaust air, resulting in insufficient preheating of outdoor air and low heating efficiency of the heat exchange cores, thus affecting the effectiveness of heat exchange, this invention proposes a ventilation system for a chemical metrology laboratory with a heat exchange device.

[0005] 2. Technical Solution

[0006] A ventilation system for a chemical metrology laboratory with a heat exchange device includes a ventilation box. An air inlet pipe is fixedly installed on the upper left wall of the ventilation box, which passes through the left end of the ventilation box and is connected to a square tube. A water tank is provided at the left end of the ventilation box. A water inlet pipe with a valve is connected to the top surface of the ventilation box. A water outlet pipe with a valve is connected to the lower end of the front wall of the ventilation box. A liquid level observation hole is provided on the front wall of the ventilation box. Two exhaust pipes are connected to the lower end of the ventilation box in a centrally symmetrical structure. A heat exchange assembly is provided at the right end of the ventilation box. An exhaust fan is connected to the right end of the exhaust pipe located at the right end. The exhaust fan is installed on the right wall of the ventilation box via a mounting bracket.

[0007] Preferably, a filter sleeve is fitted on the left wall of the air inlet pipe, a fixing block is fixed inside the air inlet pipe, a rotating shaft is fitted on the fixing block, a fan blade is fitted on the left end of the rotating shaft, a bevel gear A is fitted on the right end of the fixing block, a motor is mounted on the upper end of the left wall of the ventilation box via a mounting base, the output shaft of the motor extends through the air inlet pipe into the interior, a bevel gear B is fitted on the lower end of the motor output shaft, and the bevel gear A and bevel gear B are meshed together.

[0008] The above technical solution uses a motor to drive the fan blades to rotate and deliver outdoor air into the room, and filters the delivered air through a filter sleeve.

[0009] Preferably, both the inlet pipe and the outlet pipe are connected to the water tank, the exhaust pipe located at the left end is located at the lower end of the water tank, and the liquid level observation hole is fitted with transparent glass.

[0010] The above technical solution allows for convenient replacement of the water source inside the pool via the inlet and outlet pipes, and facilitates observation of the water level inside the pool via the level observation hole.

[0011] Preferably, the heat exchange assembly includes a heat exchange plate, a spiral air inlet pipe is embedded on the top surface of the heat exchange plate, a spiral exhaust pipe is embedded on the bottom surface of the heat exchange plate, and multiple heat exchange plates are arranged in a linear and equally spaced structure. A bracket is fixed at each of the four corners of the heat exchange plate, and the upper and lower ends of the bracket are connected and fixed to the inner wall of the ventilation box.

[0012] Through the above technical solution, the heat exchange plate can easily recover and transfer heat, improving the heat exchange effect, and the bracket provides support for the heat exchange plate.

[0013] Preferably, the inner wall of the ventilation box is provided with two guide blocks in a symmetrical structure. The upper end of the guide block located on the left end is connected to the upper end of the water tank, and the upper end of the guide block located on the right end extends through the ventilation box to the outside.

[0014] Through the above technical solution, the air guide block can easily transport outdoor air into the room.

[0015] Preferably, all the guide blocks are connected to the spiral air intake pipe, and all the spiral exhaust pipes are connected to the exhaust pipe through the hollow block.

[0016] Through the above technical solution, the spiral intake pipe transports air through the guide block, and the spiral exhaust pipe transports air through the hollow block and the exhaust pipe.

[0017] 3. Beneficial effects

[0018] Compared with the prior art, the advantages of this invention are:

[0019] 1. The rotation of the motor output shaft drives the bevel gear B to rotate synchronously. The bevel gear B meshes with and drives the bevel gear A to rotate, causing the shaft to rotate along the fixed block and drive the fan blades to rotate synchronously. The outside air passes through the filter sleeve for filtration and then enters the air inlet pipe. The outside air is then transported to the water in the water tank through the air inlet pipe and filtered and heated by the water. It then moves from the top of the water tank to the heat exchange assembly. The exhaust fan transports the indoor air to the spiral exhaust pipe, recovers the heat in the exhaust air to the heat exchange plate, and after the heat conversion is completed, the exhaust air is transported to the exhaust pipe located at the left end and discharged to the outside. The exhaust pipe located at the left end uses the remaining heat in the exhaust air to heat the water in the water tank. The heated water in the water tank preheats the outdoor air. The preheated air enters the guide block located at the left end from the water tank and is transported to the spiral air inlet pipe. The heated heat exchange plate heats the air inside the spiral air inlet pipe. It realizes heat exchange in the ventilation system of the chemical metrology laboratory, increases the residence time of exhaust air, facilitates rapid preheating of outdoor air supplied to the room, improves the heating efficiency of heat exchange, reduces temperature difference, and reduces the impact on metrology in the chemical metrology laboratory.

[0020] 2. The air supplied from the outdoor water tank to the indoor environment is filtered, and preheating is also facilitated, improving heat exchange efficiency. The use of a filter sleeve prevents polluted air from directly entering the laboratory, improving the air quality inside the laboratory and reducing the impact of dust in the air on the metrology of the chemical metrology laboratory. The heat exchange plate facilitates the recovery of heat from the air in the swirling exhaust pipe. The heat-recovering heat exchange plate preheats the air in the swirling intake pipe, extending the contact time between the external air and the heat exchange plate, thus improving heat exchange efficiency. The structure is simple and easy to use. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a cross-sectional view of the ventilation box structure of the present invention;

[0023] Figure 3 This is a cross-sectional view of the air inlet duct structure of the present invention;

[0024] Figure 4 This is a schematic diagram of the heat exchange component structure of the present invention;

[0025] Figure 5 This is a schematic diagram of the heat exchange plate structure assembly of the present invention;

[0026] Figure 6 This is a bottom view of the heat exchange plate structure of the present invention.

[0027] In the diagram: 1. Ventilation box; 2. Air inlet pipe; 201. Filter sleeve; 202. Fixing block; 203. Rotating shaft; 204. Fan blade; 205. Bevel gear A; 206. Motor; 207. Bevel gear B; 3. Square tube; 4. Water tank; 5. Water inlet pipe; 6. Water outlet pipe; 7. Liquid level observation hole; 8. Exhaust pipe; 9. Heat exchange assembly; 901. Heat exchange plate; 902. Coiled air inlet pipe; 903. Coiled exhaust pipe; 904. Support; 905. Guide block; 906. Hollow block; 10. Exhaust fan. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0029] Example 1

[0030] Reference Figure 1-3 A chemical metrology laboratory ventilation system with a heat exchange device includes a ventilation box 1. An air inlet pipe 2 is fixedly installed on the upper left wall of the ventilation box 1. The air inlet pipe 2 passes through the left end of the ventilation box 1 and is connected to a square pipe 3. A water pool 4 is provided at the left end of the ventilation box 1. A water inlet pipe 5 with a valve is connected to the top surface of the ventilation box 1. A water outlet pipe 6 with a valve is connected to the lower end of the front wall of the ventilation box 1. A liquid level observation hole 7 is opened on the front wall of the ventilation box 1. Two exhaust pipes 8 are connected to the lower end of the ventilation box 1 in a centrally symmetrical structure. A heat exchange component 9 is provided at the right end of the ventilation box 1. An exhaust fan 10 is connected to the right end of the exhaust pipe 8 located at the right end. The exhaust fan 10 is installed on the right wall of the ventilation box 1 through a mounting base.

[0031] A filter sleeve 201 is fitted on the left wall of the air inlet duct 2. A fixing block 202 is fixed inside the air inlet duct 2. A rotating shaft 203 is fitted on the fixing block 202. A fan blade 204 is fitted on the left end of the rotating shaft 203. A bevel gear A205 is fitted on the right end of the fixing block 202. A motor 206 is mounted on the upper left wall of the ventilation box 1 through a mounting base. The output shaft of the motor 206 extends through the air inlet duct 2 and into the interior. A bevel gear B207 is fitted on the lower end of the output shaft of the motor 206. The bevel gear A205 and the bevel gear B207 are meshed and connected. The motor 206 drives the fan blade 204 to rotate and deliver outdoor air to the room. The delivered air is filtered by the filter sleeve 201.

[0032] Both the inlet pipe 5 and the outlet pipe 6 are connected to the water tank 4. The exhaust pipe 8, located at the left end, is located at the lower end of the water tank 4. The liquid level observation hole 7 is fitted with transparent glass. The inlet pipe 5 and the outlet pipe 6 facilitate the replacement of the water source inside the water tank 4, and the liquid level observation hole 7 facilitates the observation of the water level inside the water tank 4.

[0033] The working principle of this invention is as follows: First, the left end of the device is extended through the wall of the chemical metrology laboratory to the outer wall for installation. At this time, the air inlet pipe 2 and the exhaust pipe 8 located at the left end are outside the chemical metrology laboratory. Then, external water is transported to the inside of the water tank 4 through the water inlet pipe 5. After the water is added to the middle position of the water tank 4 through the liquid level observation hole 7, the valve is closed. The output shaft of the motor 206 rotates, driving the bevel gear B207 to rotate synchronously. The bevel gear B207 meshes and drives the bevel gear A205 to rotate, causing the rotating shaft 203 to rotate along the fixed block 202 and drive the fan blade 204 to rotate synchronously. The external air passes through the filter sleeve 201 for filtration and then enters the inside of the air inlet pipe 2. The external air is transported to the water in the water tank 4 through the square pipe 3 through the air inlet pipe 2. After being filtered and heated by the water, it moves from the top of the water tank 4 to the inside of the heat exchange component 9, completing the air intake operation.

[0034] Example 2:

[0035] A ventilation system for a chemical metrology laboratory with a heat exchange device includes a ventilation box 1. An air inlet pipe 2 is fixedly installed on the upper left wall of the ventilation box 1. The air inlet pipe 2 passes through the left end of the ventilation box 1 and is connected to a square pipe 3. A water tank 4 is provided at the left end inside the ventilation box 1. A water inlet pipe 5 with a valve is connected to the top surface of the ventilation box 1. A water outlet pipe 6 with a valve is connected to the lower end of the front wall of the ventilation box 1. A liquid level observation hole 7 is opened on the front wall of the ventilation box 1. Two exhaust pipes 8 are connected to the lower end of the interior of the ventilation box 1 in a centrally symmetrical structure. A heat exchange component 9 is provided at the right end of the interior of the ventilation box 1. An exhaust fan 10 is connected to the right end of the exhaust pipe 8 located at the right end. The exhaust fan 10 is installed on the right wall of the ventilation box 1 through a mounting base.

[0036] A filter sleeve 201 is fitted on the left wall of the air inlet pipe 2. A fixing block 202 is fixed inside the air inlet pipe 2. A rotating shaft 203 is fitted on the fixing block 202. A fan blade 204 is fitted on the left end of the rotating shaft 203. A bevel gear A205 is fitted on the right end of the fixing block 202. A motor 206 is installed on the upper left wall of the ventilation box 1 through a mounting base. The output shaft of the motor 206 extends through the air inlet pipe 2 and into the interior. A bevel gear B207 is fitted on the lower end of the output shaft of the motor 206. The bevel gear A205 and the bevel gear B207 are meshed and connected. The water inlet pipe 5 and the water outlet pipe 6 are both connected to the water tank 4. The exhaust pipe 8 located on the left end is located at the lower end of the interior of the water tank 4. A transparent glass is embedded inside the liquid level observation hole 7.

[0037] The heat exchange assembly 9 includes a heat exchange plate 901. A spiral air inlet pipe 902 is embedded on the top surface of the heat exchange plate 901, and a spiral exhaust pipe 903 is embedded on the bottom surface of the heat exchange plate 901. Multiple heat exchange plates 901 are arranged in a linear and equally spaced structure. A bracket 904 is fixed at each of the four corners of the heat exchange plate 901. The upper and lower ends of the bracket 904 are connected and fixed to the inner wall of the ventilation box 1.

[0038] In an embodiment of the present invention, the heat exchange plate 901 facilitates heat recovery and transfer, thereby improving the heat exchange effect, and the bracket 904 provides support for the heat exchange plate 901.

[0039] Example 3:

[0040] A ventilation system for a chemical metrology laboratory with a heat exchange device includes a ventilation box 1. An air inlet pipe 2 is fixedly installed on the upper left wall of the ventilation box 1. The air inlet pipe 2 passes through the left end of the ventilation box 1 and is connected to a square pipe 3. A water tank 4 is provided at the left end inside the ventilation box 1. A water inlet pipe 5 with a valve is connected to the top surface of the ventilation box 1. A water outlet pipe 6 with a valve is connected to the lower end of the front wall of the ventilation box 1. A liquid level observation hole 7 is opened on the front wall of the ventilation box 1. Two exhaust pipes 8 are connected to the lower end of the interior of the ventilation box 1 in a centrally symmetrical structure. A heat exchange component 9 is provided at the right end of the interior of the ventilation box 1. An exhaust fan 10 is connected to the right end of the exhaust pipe 8 located at the right end. The exhaust fan 10 is installed on the right wall of the ventilation box 1 through a mounting base.

[0041] A filter sleeve 201 is fitted on the left wall of the air inlet pipe 2. A fixing block 202 is fixed inside the air inlet pipe 2. A rotating shaft 203 is fitted on the fixing block 202. A fan blade 204 is fitted on the left end of the rotating shaft 203. A bevel gear A205 is fitted on the right end of the fixing block 202. A motor 206 is installed on the upper left wall of the ventilation box 1 through a mounting base. The output shaft of the motor 206 extends through the air inlet pipe 2 and into the interior. A bevel gear B207 is fitted on the lower end of the output shaft of the motor 206. The bevel gear A205 and the bevel gear B207 are meshed and connected. The water inlet pipe 5 and the water outlet pipe 6 are both connected to the water tank 4. The exhaust pipe 8 located on the left end is located at the lower end of the interior of the water tank 4. A transparent glass is embedded inside the liquid level observation hole 7.

[0042] The heat exchange assembly 9 includes a heat exchange plate 901. A spiral air inlet pipe 902 is embedded on the top surface of the heat exchange plate 901, and a spiral exhaust pipe 903 is embedded on the bottom surface of the heat exchange plate 901. Multiple heat exchange plates 901 are arranged in a linear and equally spaced structure. A bracket 904 is fixed at each of the four corners of the heat exchange plate 901. The upper and lower ends of the bracket 904 are connected and fixed to the inner wall of the ventilation box 1.

[0043] The inner wall of the ventilation box 1 has two guide blocks 905 fixedly installed in a symmetrical structure. The upper end of the guide block 905 located on the left end is connected to the upper end of the water tank 4, and the upper end of the guide block 905 located on the right end extends through the ventilation box 1 to the outside. The guide blocks 905 facilitate the delivery of outdoor air to the room. Both guide blocks 905 are connected to the spiral air intake pipe 902, and both spiral exhaust pipes 903 are connected to the exhaust pipe 8 through the hollow block 906. The spiral air intake pipe 902 delivers air through the guide blocks 905, and the spiral exhaust pipe 903 delivers air through the hollow block 906 and the exhaust pipe 8.

[0044] In an embodiment of the present invention, during use, indoor air is delivered to the exhaust duct 8 located on the right by the exhaust fan 10, and then delivered to the spiral exhaust pipe 903 located on the left by the hollow block 906. Because the spiral exhaust pipe 903 meanders and spirals on the heat exchange plate 901, the air residence time is increased, facilitating the recovery of heat from the exhaust air to the heat exchange plate 901. After heat conversion, the exhaust air is delivered to the exhaust duct 8 located on the left and discharged to the outside. At this time, the exhaust duct 8 located on the left will discharge the air... The remaining heat is used to heat the water in pool 4. The heated water in pool 4 preheats the outdoor air. The preheated air enters the guide block 905 located at the left end from pool 4 and is transported to the spiral air intake pipe 902. The heated heat exchange plate 901 heats the air inside the spiral air intake pipe 902. After heating, the air is transported to the chemical metrology laboratory from the guide block 905 located at the right end. This realizes heat exchange during the ventilation process in the chemical metrology laboratory and reduces the temperature difference between indoor and outdoor air.

[0045] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A ventilation system for a chemical metrology laboratory with a heat exchange device, comprising a ventilation box (1), characterized in that: The ventilation box (1) has an air inlet pipe (2) fixedly installed on the upper left wall. The air inlet pipe (2) passes through the left end of the ventilation box (1) and is connected to a square pipe (3). The ventilation box (1) has a water pool (4) inside the left end. The ventilation box (1) has a water inlet pipe (5) with a valve connected to the top surface. The ventilation box (1) has a water outlet pipe (6) with a valve connected to the lower front wall. The ventilation box (1) has a liquid level observation hole (7) on the front wall. The ventilation box (1) has two exhaust pipes (8) connected to the lower interior in a centrally symmetrical structure. The ventilation box (1) has a heat exchange component (9) inside the right end. The exhaust pipe (8) located on the right end is connected to an exhaust fan (10). The exhaust fan (10) is installed on the right wall of the ventilation box (1) through a mounting base. The heat exchange assembly (9) includes a heat exchange plate (901), a spiral air intake pipe (902) is embedded on the top surface of the heat exchange plate (901), and a spiral exhaust pipe (903) is embedded on the bottom surface of the heat exchange plate (901). The ventilation box (1) has two guide blocks (905) fixed on its inner wall in a symmetrical structure. The upper end of the guide block (905) located on the left is connected to the upper end of the water tank (4), and the upper end of the guide block (905) located on the right extends through the ventilation box (1) to the outside. The guide blocks (905) are all connected to the spiral air inlet pipe (902), and the spiral exhaust pipe (903) is connected to the exhaust pipe (8) through the hollow block (906).

2. The chemical metrology laboratory ventilation system with heat exchange device according to claim 1, characterized in that: The air inlet pipe (2) is fitted with a filter sleeve (201) on the left wall. A fixing block (202) is fixed inside the air inlet pipe (2). A rotating shaft (203) is fitted on the fixing block (202). A fan blade (204) is fitted on the left end of the rotating shaft (203). A bevel gear A (205) is fitted on the right end of the fixing block (202). A motor (206) is installed on the upper left wall of the ventilation box (1) through a mounting seat.

3. The chemical metrology laboratory ventilation system with heat exchange device according to claim 2, characterized in that: The output shaft of the motor (206) extends through the air inlet pipe (2) into the interior. A bevel gear B (207) is sleeved on the lower end of the output shaft of the motor (206). The bevel gear A (205) meshes with the bevel gear B (207).

4. The ventilation system for a chemical metrology laboratory with a heat exchange device according to claim 1, characterized in that: The inlet pipe (5) and outlet pipe (6) are both connected to the water tank (4). The exhaust pipe (8) located on the left is located at the lower end of the water tank (4). The liquid level observation hole (7) is fitted with transparent glass.

5. The ventilation system for a chemical metrology laboratory with a heat exchange device according to claim 1, characterized in that: The heat exchange plate (901) is provided in a linear and equally spaced structure with multiple supports (904) fixed at the four corners of the heat exchange plate (901). The upper and lower ends of the supports (904) are connected and fixed to the inner wall of the ventilation box (1).

Images