Liquid nitrogen dehumidifier

Abstract

The liquid nitrogen dehumidifier comprises a ventilation pipeline, a liquid nitrogen storage tank and a fan, a liquid nitrogen inlet is formed in the side wall of the ventilation pipeline, and a liquid nitrogen dehumidification area corresponding to the liquid nitrogen inlet is formed in the ventilation pipeline; the output end of the liquid nitrogen storage tank is communicated with the liquid nitrogen inlet; the liquid nitrogen dehumidifier belongs to the technical field of dehumidification, and is high in dehumidification efficiency and low in energy consumption.

Description

Technical Field

[0001] The utility model relates to a liquid nitrogen dehumidifier and belongs to the technical field of dehumidification. Background Art

[0002] In high-standard laboratories, culture rooms, operating rooms and high-precision production workshops, there are very high requirements for humidity stability. The dehumidification on the market currently mainly uses the air-conditioning evaporator to reduce the air humidity and condense the water vapor in the air to achieve the dehumidification effect. This method will cause the room temperature to fluctuate greatly, and it consumes a lot of energy, dehumidifies slowly, and it is difficult to stabilize the temperature and humidity.

[0003] Therefore, there is an urgent need for a dehumidifier with high dehumidification efficiency and low energy consumption. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a liquid nitrogen dehumidifier with high dehumidification efficiency and low energy consumption.

[0005] The utility model solves the above technical problems with the following technical solutions: A liquid nitrogen dehumidifier, comprising:

[0006] A ventilation duct, wherein a liquid nitrogen inlet is provided on a side wall of the ventilation duct, and a liquid nitrogen dehumidification zone is formed in the ventilation duct corresponding to the liquid nitrogen inlet;

[0007] A liquid nitrogen storage tank, wherein the output end of the liquid nitrogen storage tank is connected to the liquid nitrogen inlet;

[0008] A fan, wherein an air outlet of the fan is connected to an air inlet of the ventilation duct.

[0009] The utility model has the following beneficial effects: when the fan is turned on, the fan conveys the air in the space into the ventilation duct, the air flows in the ventilation duct under the action of the fan, and the liquid nitrogen in the liquid nitrogen storage tank enters the ventilation duct through the liquid nitrogen inlet, which can quickly cool the air in the dehumidification area of ​​the liquid nitrogen, so that the water vapor in the air condenses to form water droplets or even ice, which fall into the ventilation duct under the action of gravity, and the dehumidified air is output from the outlet of the ventilation duct. The dehumidification efficiency is high and the energy consumption is low because the temperature is reduced by the liquid nitrogen.

[0010] On the basis of the above technical solution, the present invention can also be improved as follows.

[0011] Furthermore, it also includes a liquid nitrogen nozzle, one end of which is installed at the output end of the liquid nitrogen storage tank, and the other end of which penetrates into the ventilation duct from the liquid nitrogen inlet.

[0012] Furthermore, it also includes a solenoid valve and a controller, wherein the solenoid valve is installed on the liquid nitrogen nozzle, and the controller is electrically connected to the solenoid valve and the fan.

[0013] The beneficial effect of adopting the above further solution is that the controller controls the opening and closing of the solenoid valve, thereby controlling the liquid nitrogen to enter the ventilation duct.

[0014] Furthermore, it also includes a humidity sensor, which is installed on the liquid nitrogen nozzle and is electrically connected to the controller.

[0015] The beneficial effect of adopting the above further scheme is as follows: the humidity sensor detects the air humidity in the ventilation duct, and when it exceeds a preset value, the data is transmitted to the controller, and the controller controls the solenoid valve to open, and liquid nitrogen is transported into the ventilation duct to cool and dehumidify the air inside it.

[0016] Furthermore, it also includes a primary filter, which is located at the air inlet of the ventilation duct and its edge is sealed and fixed to the inner wall of the ventilation duct. The fan is installed in the ventilation duct and its air intake port corresponds to the primary filter.

[0017] The beneficial effect of adopting the above further solution is: primary filtration of impurities in the air is performed to prevent the impurities from entering the fan and damaging the internal structure of the fan.

[0018] Furthermore, it also includes a medium-efficiency filter, the edge of which is sealed and fixed on the inner wall of the ventilation duct and corresponds to the air outlet of the fan.

[0019] The beneficial effect of adopting the above further solution is that the air blown out by the fan is filtered again to purify the air.

[0020] Furthermore, it also includes a surface cooler, which is fixed in the ventilation duct and corresponds to the air outlet end of the medium efficiency filter.

[0021] The beneficial effect of adopting the above further scheme is as follows: when the humidity in the air is relatively low, the solenoid valve can be closed, the surface cooler can be opened, and a cold medium can be introduced into the surface cooler to exchange heat with the air passing through the surface cooler, thereby lowering the temperature of the air, condensing the water vapor in the air, and separating the water from the air.

[0022] Furthermore, it also includes a first heater and a second heater both fixed to the inner wall of the ventilation duct, the first heater and the second heater are arranged on both sides of the liquid nitrogen dehumidification area along the air outlet direction, and the first heater and the second heater are both electrically connected to the controller.

[0023] The beneficial effects of adopting the above further scheme are as follows: the function of the first heater is to heat the air before it enters the liquid nitrogen dehumidification zone, increase the temperature difference with the liquid nitrogen dehumidification zone, and improve the effect of cooling and crystallizing water vapor in the air in the liquid nitrogen dehumidification zone; the function of the second heater is to increase the temperature of the air after dehumidification and maintain temperature balance.

[0024] Furthermore, the ventilation duct has a straight section and a bent section, the bent section is the liquid nitrogen dehumidification zone, the liquid nitrogen inlet is opened on the pipe wall of the bent section, and the liquid nitrogen inlet is opened in the bent section.

[0025] The beneficial effect of adopting the above further scheme is that the air outlet of the ventilation duct is arranged on the bending section, the air outlet faces upward, the water vapor condenses into water droplets, and the water droplets fall downward under the action of gravity and will not be blown out of the ventilation duct.

[0026] Furthermore, it also includes a collecting tray, which is located in the dehumidification area and fixed on the inner wall of the ventilation duct.

[0027] The beneficial effect of adopting the above further solution is that the water vapor in the air is condensed into water droplets or ice slag and then falls into the collection tray. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 The utility model provides a structural schematic diagram of a liquid nitrogen dehumidifier.

[0029] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0030] 1. Ventilation duct; 2. Liquid nitrogen dehumidification area; 3. Liquid nitrogen storage tank; 4. Fan; 5. Liquid nitrogen nozzle; 6. Primary filter; 7. Medium filter; 8. Surface cooler; 9. First heater; 10. Second heater; 11. Collection tray; 12. Ventilation direction. DETAILED DESCRIPTION

[0031] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0032] The utility model aims to provide a liquid nitrogen dehumidifier to solve the problems existing in the prior art, with high dehumidification efficiency and low energy consumption.

[0033] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0034] The utility model provides a liquid nitrogen dehumidifier, such as Figure 1 As shown, including:

[0035] A ventilation duct 1, a liquid nitrogen inlet is provided on a side wall of the ventilation duct 1, and a liquid nitrogen dehumidification area 2 is formed in the ventilation duct 1 corresponding to the liquid nitrogen inlet;

[0036] A liquid nitrogen storage tank 3, wherein the output end of the liquid nitrogen storage tank 3 is connected to the liquid nitrogen inlet;

[0037] The fan 4 has an air outlet connected to the air inlet of the ventilation duct 1 .

[0038] The liquid nitrogen dehumidifier provided by the utility model is turned on with the fan 4, which transports the air in the space into the ventilation duct 1. The air flows in the ventilation duct 1 under the action of the fan 4, and the liquid nitrogen in the liquid nitrogen storage tank 3 enters the ventilation duct 1 through the liquid nitrogen inlet, which can quickly cool the air in the dehumidification area of ​​the liquid nitrogen, so that the water vapor in the air condenses to form water droplets or even ice, and falls into the ventilation duct 1 under the action of gravity, and the dehumidified air is output from the outlet of the ventilation duct 1. The dehumidification efficiency is high and the energy consumption is low by lowering the temperature by liquid nitrogen.

[0039] In a specific embodiment of the utility model, a liquid nitrogen nozzle 5 is further included. One end of the liquid nitrogen nozzle 5 is installed at the output end of the liquid nitrogen storage tank 3, and the other end of the liquid nitrogen nozzle 5 penetrates into the ventilation duct 1 from the liquid nitrogen inlet.

[0040] In a specific embodiment of the utility model, a solenoid valve and a controller are also included. The solenoid valve is installed on the liquid nitrogen nozzle 5, and the controller is electrically connected to the solenoid valve and the fan 4.

[0041] The controller controls the opening and closing of the solenoid valve, thereby controlling the liquid nitrogen to flow into the ventilation duct 1.

[0042] In a specific embodiment of the utility model, a humidity sensor is further included. The humidity sensor is installed on the liquid nitrogen nozzle 5 and is electrically connected to the controller.

[0043] The humidity sensor detects the air humidity in the ventilation duct 1. When it exceeds a preset value, the data is transmitted to the controller. The controller controls the solenoid valve to open and transport liquid nitrogen into the ventilation duct 1 to cool and dehumidify the air inside.

[0044] Preferably, according to the humidity data collected by the humidity sensor, the controller can control the opening size of the solenoid valve, control the amount of liquid nitrogen entering the ventilation duct 1, and save materials.

[0045] In a specific embodiment of the utility model, it also includes a primary filter 6, which is located at the air inlet of the ventilation duct 1 and its edge is sealed and fixed to the inner wall of the ventilation duct 1. The fan 4 is installed in the ventilation duct 1 and its air intake port corresponds to the primary filter 6.

[0046] The impurities in the air are primarily filtered to prevent the impurities from entering the fan 4 and damaging the internal structure of the fan 4.

[0047] Preferably, the primary filter 6 is made of polyester fiber, and the filtration efficiency grades of the primary filter 6 are: G1, G2, G3, G4 (EN779).

[0048] Preferably, the primary filter 6 filters dust particles with a particle size of 5um and above. The material of the outer frame of the primary filter 6 can be aluminum alloy, galvanized sheet, paper frame, stainless steel, and the thickness can be selected from: 21mm, 25mm, 46mm.

[0049] Preferably, the primary filter 6 uses high-quality chemical fiber non-woven filter material with large air volume, low resistance, large dust holding capacity, and a wire mesh with rust-proof treatment on the surface, which can well fix and protect the filter material and prevent it from being damaged during use.

[0050] In a specific embodiment of the utility model, a medium-efficiency filter 7 is further included. The edge of the medium-efficiency filter 7 is sealed and fixed on the inner wall of the ventilation duct 1 and corresponds to the air outlet of the fan 4.

[0051] The air blown out by the fan 4 is filtered again to purify the air.

[0052] Preferably, the filtering standards of the medium efficiency filter 7 are: F5-F9.

[0053] Preferably, the filtering standard of the medium efficiency filter 7 is to filter dust particles with a particle size of 0.5um and above. The filter material of the medium efficiency filter 7 is synthetic fiber or glass fiber. When the synthetic fiber filter material is used, the process is roughly the same as that of the primary filter 6. The outer frame material of the medium efficiency filter 7 can be selected from: aluminum alloy, galvanized plate, paper frame, stainless steel, and the thickness can be selected from: 21mm, 25mm, 46mm. When glass fiber filter material is used, it can be made into a process without partition or with partition 292. The process without partition and with partition is also a highly efficient and commonly used process method, and the thickness is usually: 50mm, 70mm, 90mm, 150mm, etc.

[0054] In a specific embodiment of the utility model, a surface cooler 8 is further included. The surface cooler 8 is fixed in the ventilation duct 1 and corresponds to the air outlet end of the medium efficiency filter 7 .

[0055] When the humidity in the air is relatively low, the solenoid valve can be closed, the surface cooler 8 can be opened, and a cold medium can be introduced into the surface cooler 8 to perform heat exchange with the air passing through the surface cooler 8, thereby lowering the temperature of the air, condensing the water vapor in the air, and separating the water from the air.

[0056] In a specific embodiment of the utility model, it also includes a first heater 9 and a second heater 10 both fixed to the inner wall of the ventilation duct 1. The first heater 9 and the second heater 10 are arranged on both sides of the liquid nitrogen dehumidification area 2 along the ventilation direction 12. The first heater 9 and the second heater 10 are both electrically connected to the controller.

[0057] The function of the first heater 9 is to heat the air before it enters the liquid nitrogen dehumidification zone 2, increase the temperature difference with the liquid nitrogen dehumidification zone 2, and improve the effect of cooling and crystallizing water vapor in the air in the liquid nitrogen dehumidification zone 2; the function of the second heater 10 is to increase the temperature of the air after dehumidification and maintain temperature balance.

[0058] Preferably, the first heater 9 and the second heater 10 are electrically heated.

[0059] In a specific embodiment of the utility model, the ventilation duct 1 has a straight section and a bent section, the bent section is a liquid nitrogen dehumidification zone 2, the liquid nitrogen inlet is opened on the pipe wall of the bent section, and the liquid nitrogen inlet is opened in the bent section.

[0060] The air outlet of the ventilation duct 1 is arranged on the bent section, and the air outlet faces upward, so that water vapor condenses into water droplets, which fall downward under the action of gravity and will not be blown out of the ventilation duct 1.

[0061] In a specific embodiment of the utility model, a collecting tray 11 is further included. The collecting tray 11 is located in the dehumidification area and fixed to the inner wall of the ventilation duct 1 .

[0062] The water vapor in the air is condensed into water droplets or ice slag and falls into the collection tray 11. The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A liquid nitrogen dehumidifier, characterized in that: include: A ventilation duct (1), wherein a liquid nitrogen inlet is provided on a side wall of the ventilation duct (1), and a liquid nitrogen dehumidification zone (2) is formed in the ventilation duct (1) corresponding to the liquid nitrogen inlet; A liquid nitrogen storage tank (3), wherein an output end of the liquid nitrogen storage tank (3) is connected to the liquid nitrogen inlet; A fan (4), wherein an air outlet of the fan (4) is connected to an air inlet of the ventilation duct (1).

2. A liquid nitrogen dehumidifier according to claim 1, characterized in that: It also comprises a liquid nitrogen nozzle (5), one end of which is mounted on the output end of the liquid nitrogen storage tank (3), and the other end of which penetrates into the ventilation duct (1) from the liquid nitrogen inlet.

3. A liquid nitrogen dehumidifier according to claim 2, characterized in that: It also includes a solenoid valve and a controller, wherein the solenoid valve is mounted on the liquid nitrogen nozzle (5), and the controller is electrically connected to the solenoid valve and the fan (4).

4. A liquid nitrogen dehumidifier according to claim 3, characterized in that: It also includes a humidity sensor, which is mounted on the liquid nitrogen nozzle (5) and is electrically connected to the controller.

5. The liquid nitrogen dehumidifier according to claim 3, characterized in that: It also comprises a primary filter (6), the primary filter (6) being located at the air inlet of the ventilation duct (1) and having its edge sealed and fixed to the inner wall of the ventilation duct (1), and the fan (4) being installed in the ventilation duct (1) and having its air intake corresponding to the primary filter (6).

6. A liquid nitrogen dehumidifier according to claim 5, characterized in that: It also comprises a medium efficiency filter (7), the edge of which is sealed and fixed on the inner wall of the ventilation duct (1) and corresponds to the air outlet of the fan (4).

7. A liquid nitrogen dehumidifier according to claim 6, characterized in that: It also includes a surface cooler (8), which is fixed in the ventilation duct (1) and corresponds to the air outlet end of the medium efficiency filter (7).

8. The liquid nitrogen dehumidifier according to claim 7, characterized in that: It also comprises a first heater (9) and a second heater (10) both fixed to the inner wall of the ventilation duct (1); the first heater (9) and the second heater (10) are arranged on both sides of the liquid nitrogen dehumidification area (2) along the air outlet direction; and the first heater (9) and the second heater (10) are both electrically connected to the controller.

9. The liquid nitrogen dehumidifier according to claim 1, characterized in that: The ventilation duct (1) has a straight section and a bent section, the bent section is the liquid nitrogen dehumidification zone (2), the liquid nitrogen inlet is provided on the pipe wall of the bent section, and the liquid nitrogen inlet is provided in the bent section.

10. The liquid nitrogen dehumidifier according to claim 1, characterized in that: It also comprises a collecting tray (11), wherein the collecting tray (11) is located in the dehumidification area and fixed on the inner wall of the ventilation duct (1).

Images