A laboratory air conditioning system

Abstract

The application discloses a laboratory air conditioning system, which comprises a control system, a fresh air system, an exhaust system, at least one air supply module for supplying air into a laboratory and at least one area ventilation module for ventilating an area where experimental equipment is located in the laboratory to control the temperature and humidity of the area. The laboratory air conditioning system disclosed by the application is provided with the air supply module and the area ventilation module, the air supply module is used for keeping the most space of the laboratory constant in temperature and humidity, and the area ventilation module is used for keeping the surrounding of the experimental equipment constant in temperature and humidity, so that the gas emission amount of constant temperature and humidity is reduced, and energy is saved.

Description

Technical Field

[0001] This invention relates to the field of air conditioning system technology, and more particularly to a laboratory air conditioning system. Background Technology

[0002] In the laboratory field, air conditioning systems are required to regulate the temperature. With the development of technology, more and more experiments need to be conducted in constant temperature and humidity laboratories. To meet the requirements for the accuracy of constant temperature and humidity in the laboratory, experience shows that a constant temperature and humidity room with a temperature range of ±1℃ requires an air exchange rate of approximately 15-20 times / hour, and a constant temperature and humidity room with a temperature range of ±0.2℃ requires an air exchange rate of more than 30 times / hour. At the same time, a stable and uniform temperature and humidity field must be established to ensure that when the airflow reaches the working area, its average temperature and humidity do not exceed the allowable fluctuation values. Therefore, a large amount of energy is required to maintain the operation of the constant temperature and humidity laboratory.

[0003] However, most experiments generate gases that need to be emitted during the experiment, and how to solve this problem has become a challenge for the industry.

[0004] Currently, the basic approach is to create a separate equipment compartment for the experimental equipment, and then extract the air from the compartment through ducts using an exhaust fan, thus carrying away the gases generated by the experimental equipment. However, this method of exhausting gas from the compartment results in excessive airflow, which can easily lead to deviations in temperature and humidity within the compartment, thereby affecting the experiment. In addition, the direct exhaust of large quantities of gas that meets the required temperature and humidity also results in a significant waste of energy resources.

[0005] Therefore, it is necessary to provide a laboratory air conditioning system that can easily maintain constant temperature and humidity in the laboratory. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a laboratory air conditioning system in which the air supply module and the area ventilation module work together. The air supply module is used to maintain a constant temperature and humidity in most of the laboratory space, and the area ventilation module is used to maintain a constant temperature and humidity around the experimental equipment, thereby reducing the amount of gas emitted during constant temperature and humidity control and saving energy.

[0007] The present invention provides a laboratory air conditioning system, including a control system, a fresh air system, an exhaust system, at least one air supply module for supplying air to the laboratory, and at least one area ventilation module for ventilating the area where the experimental equipment is located in the laboratory to control the temperature and humidity of the area.

[0008] The fresh air system, the exhaust system, the air supply module, and the area ventilation module are respectively connected to the control system via signals.

[0009] The fresh air system includes a fresh air duct, a fresh air box, and a supply air duct connected in sequence. The fresh air box contains a fresh air filter module, a fresh air temperature and humidity control module, and a fresh air fan installed in sequence along the airflow direction.

[0010] The exhaust system includes an exhaust duct, an exhaust filter module installed in the exhaust duct, and an exhaust fan installed at the end of the exhaust duct.

[0011] The air supply module includes an air supply box installed on the top of the laboratory, the air supply box being connected to the air supply duct, and the bottom of the air supply box having an air supply outlet.

[0012] The area ventilation module includes a blowing module for blowing air onto the experimental equipment and an exhaust module for removing the gas discharged from the experimental equipment and the gas blown out by the blowing module.

[0013] The blowing module is connected to the air supply pipe, and the exhaust module is connected to the exhaust pipe. The blowing module and the exhaust module are arranged at intervals, and a negative pressure area is formed between the blowing module and the exhaust module. The experimental equipment is located in the negative pressure area, and the blowing module and the exhaust module are located on opposite sides of the experimental equipment.

[0014] In one of the alternative technical solutions, the air extraction volume of the exhaust module is kept slightly greater than the air blowing volume of the blower module.

[0015] In one of the alternative technical solutions, the blowing module includes a blowing pipe connected to the air supply pipe and a blowing pipe head connected to the end of the blowing pipe, wherein a blowing flow regulating valve is installed in the blowing pipe.

[0016] The exhaust module includes an exhaust pipe connected to the exhaust pipe and an exhaust pipe head connected to the end of the exhaust pipe, and an exhaust flow regulating valve is installed in the exhaust pipe.

[0017] The blower head and the exhaust head are located on opposite sides of the experimental equipment;

[0018] The blower flow regulating valve and the exhaust flow regulating valve are respectively connected to the control system signal.

[0019] In one of the alternative technical solutions, multiple sections of air blowing regulating pipe are connected between the air blowing pipe and the air blowing head, and any two adjacent sections of the air blowing regulating pipe can be pivotally connected;

[0020] The exhaust duct and the exhaust pipe head are connected by multiple exhaust regulating ducts, and any two adjacent exhaust regulating ducts can be pivotally connected.

[0021] In one of the alternative technical solutions, the blowing duct and the exhaust duct are respectively covered with a heat insulation layer.

[0022] In one of the alternative technical solutions, a blower shroud is provided on the blower head, and the opening of the blower shroud gradually increases along the direction from the blower head to the exhaust head.

[0023] The exhaust pipe head is provided with an exhaust hood, and the opening of the exhaust hood gradually increases along the direction from the exhaust pipe head to the blower head.

[0024] In one of the alternative technical solutions, the side of the air supply box has an air supply box return air inlet, and an electric damper is installed in the air supply box return air inlet. The electric damper is signal-connected to the control system.

[0025] In one of the alternative technical solutions, the air supply box includes an air supply box outer shell and an air supply box inner shell located within the air supply box outer shell;

[0026] An annular flow channel is formed between the inner shell of the air supply box and the outer shell of the air supply box;

[0027] The air inlet of the air supply box is located on the top of the air supply box shell, and the air inlet is connected to the air supply pipe.

[0028] The air supply port of the air supply box is located at the bottom of the air supply box shell, and the air return port of the air supply box is located on the side of the air supply box shell.

[0029] An inner shell air inlet is provided on the inner shell of the air supply box below the air supply box air inlet, and an inner shell air outlet is provided on the inner shell of the air supply box above the air supply box air outlet.

[0030] In one of the alternative technical solutions, a return air duct is connected between the exhaust duct and the fresh air duct, and an electric return air valve is installed in the return air duct, which is signal-connected to the control system.

[0031] In one of the alternative technical solutions, the air supply pipe is inserted into the exhaust pipe, and an annular exhaust channel is formed between the exhaust pipe and the air supply pipe.

[0032] In one of the optional technical solutions, the fresh air temperature and humidity control module includes a dehumidification unit, a heating unit, and a humidification unit arranged sequentially along the airflow direction, wherein the dehumidification unit, the heating unit, and the humidification unit are respectively connected to the control system via signals.

[0033] In one of the alternative technical solutions, a water storage tank is provided on the bottom plate of the fresh air box, and a drain pipe is also installed on the bottom plate of the fresh air box. One end of the drain pipe is inserted into the water storage tank, and the other end of the drain pipe extends out of the outside of the fresh air box.

[0034] The above technical solution has the following beneficial effects:

[0035] The laboratory air conditioning system provided by this invention is equipped with an air supply module and a zone ventilation module. The air supply module is used to maintain a constant temperature and humidity in most of the laboratory space, and the zone ventilation module is used to maintain a constant temperature and humidity around the experimental equipment, thereby reducing the amount of gas emitted during constant temperature and humidity control and saving energy.

[0036] The laboratory air conditioning system provided by this invention has a return air inlet on the side of the air supply box. The air with a slightly higher temperature in the laboratory can return to the air supply box through the return air inlet, mix with the air with a lower temperature in the air supply box, and then be discharged through the air supply outlet. This can effectively prevent condensation on the top of the laboratory and thus prevent dew from dripping and affecting the experimental equipment.

[0037] The laboratory air conditioning system provided by this invention introduces the exhaust gas from the laboratory into the fresh air box through the return air duct, realizing the gas recycling of the laboratory, making full use of the exhaust gas from the laboratory, reducing the load on the fresh air temperature and humidity control module in the fresh air box, and helping to save energy.

[0038] The laboratory air conditioning system provided by this invention adopts a double-layer volute structure for the air supply box, with the outer shell of the air supply box replacing the insulation layer, thus reducing the amount of rubber and plastic insulation used. The laboratory air conditioning system provided by this invention utilizes a negative pressure zone for exhaust between the blowing and exhaust modules, reducing the exhaust volume and thus the required exhaust volume of the exhaust duct. Therefore, the air supply duct can be arranged within the exhaust duct, achieving pipe sharing. The gap between the air supply and exhaust ducts satisfies exhaust requirements, increases the temperature of the air supply duct, and reduces the power of the exhaust fan, significantly reducing project investment and cost from multiple perspectives.

[0039] In summary, the laboratory air conditioning system provided by this invention facilitates the maintenance of constant temperature and humidity in the laboratory, effectively prevents condensation, reduces gas emissions, and saves energy. Attached Figure Description

[0040] The disclosure of this invention will become more readily understood by referring to the accompanying drawings. It should be understood that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. In the drawings:

[0041] Figure 1 A schematic diagram of a laboratory air conditioning system provided in an embodiment of the present invention;

[0042] Figure 2 A schematic diagram of a laboratory air conditioning system provided in another embodiment of the present invention;

[0043] Figure 3 This is a schematic diagram of a fresh air system;

[0044] Figure 4 This is a schematic diagram of the layout of the fresh air box;

[0045] Figure 5 This is a schematic diagram showing the connection between the exhaust system and the return air duct.

[0046] Figure 6 A schematic diagram showing the layout of the air supply module and the zone ventilation module in the laboratory;

[0047] Figure 7 A schematic diagram showing the layout of the blower hood and the exhaust hood;

[0048] Figure 8 This is a schematic diagram of the air supply box layout;

[0049] Figure 9 This diagram illustrates the signal connections between the fresh air system, exhaust system, air supply module, and area ventilation module and the control system. Detailed Implementation

[0050] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings. Identical components are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, while the terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0051] like Figure 1-6 and Figure 9 As shown, an embodiment of the present invention provides a laboratory air conditioning system, including a control system 1, a fresh air system 2, an exhaust air system 3, at least one air supply module 4 for supplying air to the laboratory 7, and at least one area ventilation module 5 for ventilating the area where the experimental equipment 72 is located in the laboratory 7 to control the temperature and humidity of the area.

[0052] The fresh air system 2, exhaust system 3, air supply module 4, and area ventilation module 5 are respectively connected to the control system 1 via signals.

[0053] The fresh air system 2 includes a fresh air duct 21, a fresh air box 22 and an air supply duct 23 connected in sequence. The fresh air box 22 contains a fresh air filter module 24, a fresh air temperature and humidity control module 25 and a fresh air fan 26 installed in sequence along the airflow direction.

[0054] The exhaust system 3 includes an exhaust duct 31, an exhaust filter module 32 installed in the exhaust duct 31, and an exhaust fan 33 installed at the end of the exhaust duct 31.

[0055] The air supply module 4 includes an air supply box 41 installed on the top of the laboratory. The air supply box 41 is connected to the air supply duct 23, and the bottom of the air supply box 41 has an air supply port 415.

[0056] The area ventilation module 5 includes a blowing module 51 for blowing air onto the experimental equipment 72 and an exhaust module 52 for removing the gas discharged from the experimental equipment 72 and the gas blown out by the blowing module 51.

[0057] The blower module 51 is connected to the air supply pipe 23, and the exhaust module 52 is connected to the exhaust pipe 31. The blower module 51 and the exhaust module 52 are arranged at intervals, and a negative pressure area 53 is formed between the blower module 51 and the exhaust module 52. The experimental equipment 72 is located in the negative pressure area 53, and the blower module 51 and the exhaust module 52 are located on opposite sides of the experimental equipment 72.

[0058] The laboratory air conditioning system provided by this invention is mainly used in laboratories 7 that require constant temperature and humidity. Laboratory 7 is generally equipped with ordinary non-gas-producing experimental instruments 71 and gas-producing experimental equipment 72.

[0059] The laboratory's air conditioning system mainly includes a control system 1, a fresh air system 2, an exhaust system 3, an air supply module 4, and a zone ventilation module 5.

[0060] Control system 1 uses a computer system to integrate and control the operation of various electrical components of the laboratory air conditioning system. Fresh air system 2, exhaust air system 3, air supply module 4, and area ventilation module 5 are connected to control system 1 via wires. Control system 1 centrally controls the operation of each valve, fan, and module in fresh air system 2, exhaust air system 3, air supply module 4, and area ventilation module 5.

[0061] The fresh air system 2, located outside the laboratory 7, provides fresh air. It includes a fresh air duct 21, a fresh air box 22, and a supply air duct 23, which are connected sequentially. The fresh air duct 21 allows fresh air from outside to enter the fresh air box 22, while the supply air duct 23 delivers the fresh air to the supply air module 4 and the area ventilation module 5 within the laboratory 7. The fresh air duct 21 is equipped with a fresh air duct electric valve 211, and the supply air duct 23 is equipped with a supply air duct electric valve 231.

[0062] The fresh air box 22 is equipped with a fresh air filter module 24, a fresh air temperature and humidity control module 25, and a fresh air fan 26. The fresh air filter module 24, the fresh air temperature and humidity control module 25, and the fresh air fan 26 are arranged sequentially and at intervals along the airflow direction in the fresh air box 22.

[0063] The fresh air filtration module 24 is a filter located at the front end of the fresh air box 22, used to filter the gas entering from the fresh air duct 21.

[0064] The fresh air temperature and humidity control module 25 is located behind the fresh air filter module 24. It is used to dehumidify, adjust the temperature, and humidify the filtered air to ensure that the air meets the constant temperature and humidity requirements of laboratory 7. In summer, when the outside air temperature and humidity are high, the fresh air temperature and humidity control module 25 first cools and dehumidifies the air, and then raises the temperature to about 20°C. In winter, when the outside air temperature and humidity are low, the fresh air temperature and humidity control module 25 first raises the air temperature to about 20°C, and then humidifies the heated air.

[0065] The fresh air fan 26 is located behind the fresh air temperature and humidity control module 25 and is used to deliver the air processed by the fresh air temperature and humidity control module 25 to the air supply duct 23. The air inlet of the air supply duct 23 is connected to the air outlet of the fresh air fan 26.

[0066] The fresh air duct electric valve 211, the supply air duct electric valve 231, the fresh air temperature and humidity control module 25, and the fresh air fan 26 are respectively connected to the control system 1 via wires.

[0067] If air needs to be supplied to multiple laboratories 7, multiple parallel air supply duct branches can be arranged in the air supply duct 23 as needed.

[0068] The exhaust system 3 includes an exhaust duct 31, an exhaust filter module 32, and an exhaust fan 33.

[0069] One end (air inlet) of the exhaust duct 31 is connected to laboratory 7, and the other end (exit) is located outside laboratory 7 and connected to the outside. The exhaust duct 31 can be located below the floor of laboratory 7 or above the ceiling of laboratory 7. An electric exhaust valve 311 is installed in the exhaust duct 31.

[0070] The exhaust filtration module 32 is a filter installed in the exhaust duct 31 to filter the gas in the exhaust duct 31 and prevent environmental pollution.

[0071] The exhaust fan 33 is installed at the end of the exhaust pipe 31 to provide power for exhaust.

[0072] The exhaust pipe electric valve 311 and the exhaust fan 33 are respectively connected to the control system 1 via wires.

[0073] If exhaust is required for multiple laboratories 7, multiple parallel exhaust duct branches can be arranged in exhaust duct 31 as needed.

[0074] The air supply module 4 includes an air supply box 41, which is installed on the ceiling of the laboratory 7. The air supply box inlet 414 of the air supply box 41 is connected to the air supply duct 23. The air supply outlet 415 is located at the bottom of the air supply box 41 and is used to supply air into the laboratory 7. A nozzle 417 is installed on the air supply outlet 415 for easy control of the air supply area. The nozzle 417 can be a jet nozzle, which outputs high air pressure and fast flow rate. The air supply module 4 can be optionally installed above the experimental instrument 71 to facilitate rapid gas delivery to the instrument 71.

[0075] The number of air supply modules 4 can be set as needed.

[0076] The area ventilation module 5 is used to ventilate the area where the experimental equipment 72 is located in the laboratory 7 in order to control the temperature and humidity of the area.

[0077] The area ventilation module 5 includes a blowing module 51 and an exhaust module 52. The blowing module 51 is connected to the air supply duct 23 and is used to blow air onto the experimental equipment 72. The exhaust module 52 is connected to the exhaust duct 31 and is mainly used to remove the gas discharged from the experimental equipment 72 and the gas blown out by the blowing module 51. Of course, air outside the area where the experimental equipment 72 is located will also be removed by the exhaust module 52, but the amount removed is very small.

[0078] The blowing module 51 and the exhaust module 52 are arranged on opposite sides of the experimental equipment 72, forming a negative pressure zone 53 between them. The experimental equipment 72 is located within this negative pressure zone 53. This negative pressure zone 53 is a micro-negative pressure zone or a micro-wind field zone, and the negative pressure can be set as needed. The experimental equipment 72 generally does not produce much gas; it is only necessary to ensure that the exhaust module 52 can remove the gas discharged from the experimental equipment 72 and the gas blown out by the blowing module 51. Therefore, when the zone ventilation module 5 is working, the blowing module 51 blows air onto the experimental equipment 72 to maintain its constant temperature and humidity. The exhaust module 52 removes the gas discharged from the experimental equipment 72 and the gas blown out by the blowing module 51, minimizing the removal of air outside the negative pressure zone 53 and reducing air disturbance to the surrounding space. The overall airflow in the laboratory 7 is small, concentrated only around the experimental equipment 72, which helps maintain a constant temperature and humidity environment in the laboratory 7, reduces the amount of gas emitted during constant temperature and humidity control, and saves energy.

[0079] The number of zone ventilation modules 5 can be configured according to the number of experimental equipment 72.

[0080] The laboratory air conditioning system provided by this invention has the following operating modes:

[0081] When no personnel are operating the experimental equipment 72, the control system 1 controls the activation of the fresh air system 2, the exhaust system 3, the air supply module 4, and the exhaust module 52. Fresh air is sent from the fresh air system 2 to the air supply module 4, then sent to the laboratory 7 by the air supply module 4, then extracted by the exhaust module 52, and finally discharged through the exhaust system 3.

[0082] When personnel are operating the experimental equipment 72, the control system 1 controls the activation of the fresh air system 2, the exhaust system 3, the air supply module 4, the blowing module 51, and the exhaust module 52. Fresh air is sent to the air supply module 4 and the blowing module 51 through the fresh air system 2. Part of the fresh air is sent to the laboratory 7 by the air supply module 4, and part of the fresh air is blown to the experimental equipment 72 by the blowing module 51, then drawn away by the exhaust module 52, and finally discharged through the exhaust system 3.

[0083] If necessary, other exhaust ports can also be set in laboratory 7. When no personnel are operating the experimental equipment 72, the exhaust module 52 is turned off, and the gas enters the exhaust system 3 through the exhaust port and is discharged by the exhaust system 3.

[0084] In one embodiment, the air extraction volume of the exhaust module 52 is kept slightly greater than the air blowing volume of the blower module 51, which can ensure that the negative pressure of the negative pressure area 53 is not too large, minimize the air disturbance around the experimental equipment 72, and help maintain constant temperature and humidity in the laboratory 7.

[0085] In one embodiment, such as Figure 6 and Figure 9 As shown, the blower module 51 includes a blower pipe 511 connected to the air supply pipe 23 and a blower head 512 connected to the end of the blower pipe 511. A blower flow regulating valve 513 is installed in the blower pipe 511.

[0086] The exhaust module 52 includes an exhaust pipe 521 connected to the exhaust pipe 31 and an exhaust pipe head 522 connected to the end of the exhaust pipe 521. An exhaust flow regulating valve 523 is installed in the exhaust pipe 521.

[0087] The blower head 512 and the exhaust head 522 are located on opposite sides of the experimental equipment 72.

[0088] The blower flow regulating valve 513 and the exhaust flow regulating valve 523 are respectively connected to the control system 1 via signal.

[0089] In this embodiment, the air blowing module 51 includes an air blowing duct 511, an air blowing nozzle 512, and an air blowing flow regulating valve 513. The air blowing duct 511 is connected to the air supply duct 23, the air blowing nozzle 512 is connected to the end of the air blowing duct 511, and the air blowing flow regulating valve 513 is installed in the air blowing duct 511. The air blowing flow regulating valve 513 is signal-connected to the control system 1. The control system 1 can control the opening degree of the air blowing flow regulating valve 513 to control the air blowing flow in the air blowing duct 511, thereby controlling the amount of air blown from the air blowing nozzle 512 to the experimental equipment 72.

[0090] The exhaust module 52 includes an exhaust duct 521, an exhaust pipe head 522, and an exhaust flow regulating valve 523. The exhaust duct 521 is connected to the exhaust pipe 31, the exhaust pipe head 522 is connected to the end of the exhaust duct 521, and the exhaust flow regulating valve 523 is installed in the exhaust duct 521. The exhaust flow regulating valve 523 is signal-connected to the control system 1. The control system 1 can control the opening degree of the exhaust flow regulating valve 523 to control the air flow rate in the exhaust duct 521, thereby controlling the amount of air extracted by the exhaust duct 521.

[0091] Solenoid valves can be used for both the blowing flow regulating valve 513 and the exhaust flow regulating valve 523. If the diameters of the exhaust pipe 521 and the blowing pipe 511 are the same, then during operation, the opening degree of the exhaust flow regulating valve 523 is slightly greater than that of the blowing flow regulating valve 513 to ensure that the air extraction volume of the exhaust module 52 is slightly greater than that of the blowing module 51.

[0092] In one embodiment, such as Figure 6 As shown, multiple sections of air blowing regulating pipes 514 are connected between the air blowing pipe 511 and the air blowing head 512, and any two adjacent sections of air blowing regulating pipes 514 can be pivotally connected.

[0093] There are multiple exhaust regulating pipes 524 connected between the exhaust duct 521 and the exhaust pipe head 522, and any two adjacent exhaust regulating pipes 524 can be pivotally connected.

[0094] In this embodiment, multiple sections of air-blowing adjustment pipes 514 are configured between the air-blowing pipe 511 and the air-blowing head 512. Any two adjacent sections of air-blowing adjustment pipes 514 can be pivotally connected by hinges, shafts, etc. The two adjacent sections of air-blowing adjustment pipes 514 can be rotated and adjusted, thereby adjusting the position and angle of the air-blowing head 512 to adapt to experimental equipment 72 of different models and sizes.

[0095] Multiple exhaust regulating pipes 524 are configured between the exhaust duct 521 and the exhaust pipe head 522. Any two adjacent exhaust regulating pipes 524 can be pivotally connected by hinges, shafts, etc. The two adjacent exhaust regulating pipes 524 can be rotated and adjusted, thereby adjusting the position and angle of the exhaust pipe head 522 to adapt to experimental equipment 72 of different models and sizes.

[0096] In one embodiment, the blowing duct 511 and the exhaust duct 521 are each covered with an insulation layer. The insulation layer can be made of insulating cotton or the like, which can prevent condensation from forming on the blowing duct 511 and the exhaust duct 521.

[0097] In one embodiment, such as Figure 7 As shown, a blower shroud 515 is provided on the blower head 512, and the opening of the blower shroud 515 gradually increases along the direction from the blower head 512 to the exhaust head 522.

[0098] An exhaust hood 525 is provided on the exhaust pipe head 522, and the opening of the exhaust hood 525 gradually increases along the direction from the exhaust pipe head 522 to the blower head 512.

[0099] In this embodiment, a blower hood 515 is provided on the blower head 512, and an exhaust hood 525 is provided on the exhaust head 522. The blower hood 515 and the exhaust hood 525 are arranged on opposite sides of the experimental device 72, and a negative pressure area 53 is formed between the blower hood 515 and the exhaust hood 525.

[0100] Along the direction from the blower head 512 to the exhaust head 522, the opening of the blower hood 515 gradually increases, and the opening of the exhaust hood 525 gradually increases, which is conducive to covering the experimental equipment 72 to form a negative pressure area 53 around it.

[0101] In one embodiment, such as Figure 8 As shown, the side of the air supply box 41 has an air supply box return air inlet 416, and an electric damper 418 is installed in the air supply box return air inlet 416. The electric damper 418 is connected to the control system 1 via signal.

[0102] In this embodiment, an air supply box return air inlet 416 is provided on the side of the air supply box 41, and an electric damper 418 is installed in the air supply box return air inlet 416. The electric damper 418 can be a solenoid valve. The electric damper 418 can also be hinged in the air supply box return air inlet 416 and driven to rotate by a motor. The opening degree of the electric damper 418 is controlled by the control system 1 to adjust the return air flow of the air supply box return air inlet 416.

[0103] The air return vent 416 of the air supply box serves to prevent condensation. Specifically, when air is supplied, the fresh air temperature is low, while the gas temperature in laboratory 7 is high. The gas in laboratory 7 enters the air supply box 41 through the air return vent 416 to mix with the fresh air and increase the air temperature, thereby preventing condensation at the air supply vent 415 of the air supply box and on the outer surface of the air supply box 41.

[0104] In one embodiment, such as Figure 8 As shown, the air supply box 41 includes an air supply box outer shell 411 and an air supply box inner shell 412 located within the air supply box outer shell 411.

[0105] An annular flow channel 413 is formed between the inner shell 412 and the outer shell 411 of the air supply box.

[0106] The air inlet 414 of the air supply box 41 is located on the top of the air supply box housing 411, and the air inlet 414 is connected to the air supply pipe 23.

[0107] The air supply port 415 of the air supply box is located at the bottom of the air supply box housing 411, and the air return port 416 of the air supply box is located on the side of the air supply box housing 411.

[0108] An inner shell air inlet 4121 is provided on the inner shell 412 below the air inlet 414 of the air supply box, and an inner shell air outlet 4122 is provided on the inner shell 412 above the air outlet 415 of the air supply box.

[0109] In this embodiment, the air supply box 41 adopts a double-layer volute structure, which includes an outer shell 411 and an inner shell 412. The inner shell 412 is located inside the outer shell 411, and the two are arranged at intervals to form an annular flow channel 413.

[0110] The air inlet 414 of the air supply box is located at the top of the air supply box housing 411, the air outlet 415 of the air supply box is located at the bottom of the air supply box housing 411, and the air return outlet 416 of the air supply box is located on the side of the air supply box housing 411.

[0111] The air inlet 414 of the air supply box is connected to the air supply duct 23. The inner shell air inlet 4121 is located at the top of the inner shell 412 of the air supply box, directly below the air inlet 414. The opening area of ​​the inner shell air inlet 4121 is larger than that of the air inlet 414, facilitating airflow from the air inlet 414 into the inner shell 412. The inner shell air outlet 4122 is located at the bottom of the inner shell 412, directly above the air outlet 415. The opening area of ​​the air outlet 415 is larger than that of the inner shell air outlet 4122, facilitating airflow from the inner shell air outlet 4122 into the air outlet 415.

[0112] The fresh air mainly enters the inner shell 412 of the air supply box, having little impact on the temperature of the outer shell 411, which helps prevent condensation on the outer shell 411. Air from laboratory 7 enters the circulation channel 413 through the return air inlet 416 of the air supply box, where it mixes with the fresh air entering the circulation channel 413 before being discharged from the air supply outlet 415. This helps raise the temperature of the outer shell 411 of the air supply box, minimizing the temperature difference between it and laboratory 7, further preventing condensation.

[0113] In one embodiment, such as Figure 1-5 As shown, a return air duct 6 is connected between the exhaust duct 31 and the fresh air duct 21. An electric return air valve 61 is installed in the return air duct 6, and the electric return air valve 61 is connected to the control system 1 via signal.

[0114] To avoid wasting the gas discharged from laboratory 7, this embodiment uses a return air duct 6 to recover and reuse the discharged gas. A return air duct electric valve 61 is installed in the return air duct 6. The return air duct electric valve 61 can be a solenoid valve, which is controlled by the control system 1.

[0115] The air inlet of the return air duct 6 is connected to the exhaust air duct 31, and the air inlet of the return air duct 6 is located between the electric valve 311 of the exhaust air duct and the air inlet of the exhaust air duct 31. The air outlet of the return air duct 6 is connected to the fresh air duct 21, and the air outlet of the return air duct 6 is located between the electric valve 211 of the fresh air duct and the fresh air box 22.

[0116] In summer, the temperature inside laboratory 7 is lower than the outside temperature. When experimental equipment 72 is not in operation, the exhaust duct electric valve 311 can be closed, and the fresh air duct electric valve 211 can be partially or completely closed. The gas in laboratory 7 enters the fresh air box 22 after passing through the exhaust duct 31, return air duct 6, and fresh air duct 21 for filtration, cooling, dehumidification, and heating, and is then sent out through the supply air duct 23. The temperature of the mixed gas is lower than that of the outside gas, which reduces the cooling load on the fresh air temperature and humidity control module 25, thus saving energy.

[0117] In winter, the temperature inside laboratory 7 is higher than the outside temperature. When experimental equipment 72 is not in operation, the exhaust duct electric valve 311 can be closed, and the fresh air duct electric valve 211 can be partially or completely closed. The gas in laboratory 7 enters the fresh air box 22 after passing through the exhaust duct 31, return air duct 6, and fresh air duct 21, where it is filtered, heated, and humidified, and then sent out through the supply air duct 23. The temperature of the mixed gas is higher than that of the outside gas, which reduces the load on the fresh air temperature and humidity control module 25 for heating the air, thus saving energy.

[0118] In one embodiment, such as Figure 1-2 As shown, the air supply pipe 23 is inserted into the exhaust pipe 31, forming an annular exhaust channel between the exhaust pipe 31 and the air supply pipe 23.

[0119] Depending on the needs, the entire supply air duct 23 can be inserted into the exhaust air duct 31, or only a portion of the supply air duct 23 can be inserted into the exhaust air duct 31. Since the diameter of the supply air duct 23 is smaller than that of the exhaust air duct 31, several annular supports can be installed in the exhaust air duct 31. These annular supports have ventilation openings or perforations. The supply air duct 23 is supported by the annular supports, forming an annular exhaust channel between the exhaust air duct 31 and the supply air duct 23.

[0120] Inserting the supply air duct 23 into the exhaust air duct 31 facilitates duct layout and does not occupy additional installation space. In addition, the temperature of the gas returning from the exhaust duct is higher than the temperature of the fresh air in the supply air duct 23. The gas returning from the exhaust duct exchanges heat with the supply air duct 23, which helps to raise the temperature of the fresh air in the supply air duct 23, reducing the temperature difference between it and the gas in laboratory 7, and further preventing condensation.

[0121] In one embodiment, such as Figure 4 As shown, the fresh air temperature and humidity control module 25 includes a dehumidification unit 251, a heating unit 252 and a humidification unit 253 arranged sequentially along the airflow direction. The dehumidification unit 251, the heating unit 252 and the humidification unit 253 are respectively connected to the control system 1 via signals.

[0122] The dehumidification unit 251 can be a dehumidifier or a dehumidification heat exchanger. The dehumidification heat exchanger is connected to an external refrigeration unit or to a municipal chilled water pipe to cool and dehumidify the air.

[0123] The heating unit 252 can use heating gas or a heating heat exchanger. The heating heat exchanger is connected to an external heating unit or to a municipal hot water pipe to heat the air.

[0124] The humidification unit 253 uses a humidifier, which humidifies the air by spraying water mist.

[0125] When dehumidification is needed in summer, the dehumidification unit 251 and the heating unit 252 are turned on, while the humidification unit 253 is turned off.

[0126] When humidification is needed in winter, the dehumidification unit 251 is turned off, while the heating unit 252 and the humidification unit 253 are turned on.

[0127] In one embodiment, such as Figure 4 The fresh air box 22 has a water storage tank 221 on its bottom plate and a drain pipe 27 installed on its bottom plate. One end of the drain pipe 27 is inserted into the water storage tank 221 and the other end of the drain pipe 27 extends out of the outside of the fresh air box 22.

[0128] During dehumidification, the condensate generated is collected in the water storage tank 221 and then discharged from the fresh air box 22 through the drain pipe 27 for collection, so as to avoid the condensate from accumulating in the fresh air box 22 and affecting the fresh air fan 26 and other components.

[0129] In summary, the laboratory air conditioning system provided by this invention facilitates the maintenance of constant temperature and humidity in the laboratory, effectively prevents condensation, reduces gas emissions, and saves energy.

[0130] As needed, the above technical solutions can be combined to achieve the best technical effect.

[0131] The above description is merely the principle and preferred embodiment of the present invention. It should be noted that, for those skilled in the art, several other modifications can be made based on the principle of the present invention, and these modifications should also be considered within the scope of protection of the present invention.

Claims

1. A laboratory air conditioning system, characterized in that, It includes a control system, a fresh air system, an exhaust system, at least one air supply module for supplying air to the laboratory, and at least one area ventilation module for ventilating the area where the experimental equipment is located in the laboratory to control the temperature and humidity of the area. The fresh air system, the exhaust system, the air supply module, and the area ventilation module are respectively connected to the control system via signals. The fresh air system includes a fresh air duct, a fresh air box, and a supply air duct connected in sequence. The fresh air box contains a fresh air filter module, a fresh air temperature and humidity control module, and a fresh air fan installed in sequence along the airflow direction. The exhaust system includes an exhaust duct, an exhaust filter module installed in the exhaust duct, and an exhaust fan installed at the end of the exhaust duct. The air supply module includes an air supply box installed on the top of the laboratory, the air supply box being connected to the air supply duct, and the bottom of the air supply box having an air supply outlet. The area ventilation module includes a blowing module for blowing air onto the experimental equipment and an exhaust module for removing the gas discharged from the experimental equipment and the gas blown out by the blowing module. The blowing module is connected to the air supply pipe, the exhaust module is connected to the exhaust pipe, the blowing module and the exhaust module are arranged at intervals, a negative pressure area is formed between the blowing module and the exhaust module, the experimental equipment is located in the negative pressure area, and the blowing module and the exhaust module are located on opposite sides of the experimental equipment. The air supply box has an air supply box return port on its side, and an electric damper is installed in the air supply box return port. The electric damper is connected to the control system via a signal. The air supply box includes an outer shell and an inner shell inside the outer shell. An annular flow channel is formed between the inner shell and the outer shell. The air supply box inlet is located at the top of the outer shell and is connected to the air supply pipe. The air supply outlet is located at the bottom of the outer shell, and the air supply box return port is located on the side of the outer shell. An inner shell inlet is located below the air supply box inlet, and an inner shell outlet is located above the air supply box outlet.

2. The laboratory air conditioning system according to claim 1, characterized in that, The suction volume of the exhaust module is kept slightly greater than the blowing volume of the blower module.

3. The laboratory air conditioning system according to claim 1, characterized in that, The blowing module includes a blowing pipe connected to the air supply pipe and a blowing pipe head connected to the end of the blowing pipe, and a blowing flow regulating valve is installed in the blowing pipe. The exhaust module includes an exhaust pipe connected to the exhaust pipe and an exhaust pipe head connected to the end of the exhaust pipe, and an exhaust flow regulating valve is installed in the exhaust pipe. The blower head and the exhaust head are located on opposite sides of the experimental equipment; The blower flow regulating valve and the exhaust flow regulating valve are respectively connected to the control system signal.

4. The laboratory air conditioning system according to claim 3, characterized in that, Multiple sections of air-blowing regulating pipes are connected between the air-blowing pipe and the air-blowing pipe head, and any two adjacent sections of the air-blowing regulating pipes can be pivotally connected. The exhaust duct and the exhaust pipe head are connected by multiple exhaust regulating ducts, and any two adjacent exhaust regulating ducts can be pivotally connected.

5. The laboratory air conditioning system according to claim 3, characterized in that, The blowing duct and the exhaust duct are each covered with an insulation layer.

6. The laboratory air conditioning system according to claim 3, characterized in that, The blower head is provided with a blower shroud, and the opening of the blower shroud gradually increases along the direction from the blower head to the exhaust head. The exhaust pipe head is provided with an exhaust hood, and the opening of the exhaust hood gradually increases along the direction from the exhaust pipe head to the blower head.

7. The laboratory air conditioning system according to any one of claims 1-6, characterized in that, A return air duct is connected between the exhaust duct and the fresh air duct. An electric return air valve is installed in the return air duct and is connected to the control system via a signal connection.

8. The laboratory air conditioning system according to any one of claims 1-6, characterized in that, The air supply pipe is inserted into the air exhaust pipe, forming an annular exhaust channel between the air exhaust pipe and the air supply pipe.

9. The laboratory air conditioning system according to any one of claims 1-6, characterized in that, The fresh air temperature and humidity control module includes a dehumidification unit, a heating unit, and a humidification unit arranged sequentially along the airflow direction. The dehumidification unit, the heating unit, and the humidification unit are respectively connected to the control system via signals.

10. The laboratory air conditioning system according to any one of claims 1-6, characterized in that, A water storage tank is provided on the bottom plate of the fresh air box, and a drain pipe is also installed on the bottom plate of the fresh air box. One end of the drain pipe is inserted into the water storage tank, and the other end of the drain pipe extends out of the outside of the fresh air box.

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