Fresh air ventilator with indoor oxygen recycling function

Abstract

The utility model belongs to the technical field of fresh air blowers, and particularly relates to a fresh air blower with an indoor oxygen recycling function. According to the fresh air machine with the indoor oxygen recycling and reusing function, the oxygen generation compressor, the molecular sieve and the indoor circulating valve are arranged on the shell, so that indoor air enters the oxygen generation compressor through the air return opening, is pressurized through the oxygen generation screening unit and then is input into the molecular sieve, and the indoor oxygen is recycled and reutilized. Nitrogen, carbon dioxide and the like in air are adsorbed, recycled high-purity oxygen is sent into a room through an indoor circulating valve and an air supply outlet, accordingly, indoor oxygen is recycled, the indoor oxygen content is increased, when the outdoor air quality is relatively poor, indoor internal circulation circulation can be conducted in a mode of slowly recycling the indoor oxygen, and the indoor air quality is improved. And indoor air circulation and air quality are guaranteed, and practicability is higher.

Description

Technical Field

[0001] The utility model belongs to the technical field of fresh air fans, and in particular relates to a fresh air fan with indoor oxygen recovery and reuse function. Background Art

[0002] The fresh air fan is an effective air purification device that can circulate indoor air, improve indoor air circulation, and increase indoor oxygen content. On the one hand, it discharges the polluted air indoors to the outside, and on the other hand, it inputs the fresh air outdoors into the room after sterilization, disinfection, filtration and other measures.

[0003] On the other hand, the structure of existing fresh air fans generally includes air inlets and outlets, as well as a heat exchange core. The heat exchange core includes two vertically distributed air ducts: fresh air inlet—first heat exchange core channel—indoor air inlet; indoor return air outlet—second heat exchange core channel—exhaust outlet. The dirty air exhausted from the room and the fresh air brought in from outside exchange temperature through the heat transfer plates, while also exchanging humidity through the micropores in the plates, thereby achieving both ventilation and maintaining stable indoor temperature and humidity. When the heat exchanger operates during the summer cooling period, the fresh air absorbs cooling energy from the exhaust air, lowering its temperature while being dried by the exhaust air, reducing its humidity. During winter operation, the fresh air absorbs heat from the exhaust air, raising its temperature while being humidified by the exhaust air.

[0004] For example, a Chinese invention patent with patent publication number CN108167999A and publication date 2018.06.15 discloses a fresh air fan, whose structure includes a shell, an air inlet portion, an air outlet portion, a return air outlet portion, an exhaust air outlet portion, a full heat exchange core, a first filter element, a first centrifugal fan and a second centrifugal fan. One end of the first chamber in the shell is connected to the air outlet portion and the other end of the first chamber is connected to the full heat exchange core, one end of the second chamber is connected to the return air outlet portion and the other end of the second chamber is connected to the full heat exchange core, the first centrifugal fan is fixedly installed in the first chamber, the first filter element is fixedly installed in the first chamber and is located between the air outlet portion and the first centrifugal fan, the second centrifugal fan is fixedly installed in the second chamber, the full heat exchange core is connected to the exhaust air outlet portion and to the air inlet portion.

[0005] The general structural principle of the fresh air fan in this invention patent is as follows: the full heat exchange core divides the shell into two major air ducts, the fresh air duct and the exhaust air duct. When the first centrifugal fan in the first chamber is working, the fresh air from the outside enters the fresh air fan from the air inlet, and the fresh air from the outside flows through the full heat exchange core and is output to the room from the air outlet. When the second centrifugal fan in the second chamber is working, the turbid air in the room flows through the full heat exchange core and is discharged to the outside from the exhaust outlet, thereby achieving indoor and outdoor air circulation.

[0006] However, the fresh air blower still has at least the following deficiencies during actual use, in other words, these are the technical problems to be solved by the present utility model.

[0007] If the fresh air fan needs to achieve the effect of indoor air circulation, it can only introduce fresh air. It is not applicable when the outdoor air quality is relatively poor, and its practicality is relatively low.

[0008] Therefore, in summary, there is an urgent need for a new type of fresh air fan that can realize internal circulation of air flow by recovering return air oxygen. Utility Model Content

[0009] The utility model provides a fresh air fan with indoor oxygen recovery and reuse function, which can be achieved by arranging an oxygen compressor, a molecular sieve and an indoor circulation valve on the shell, so that: the indoor air enters the oxygen compressor through the return air port, is pressurized by the oxygen production and screening unit, and is input into the molecular sieve to adsorb nitrogen, carbon dioxide and the like in the air, and the recovered high-purity oxygen is sent to the room through the indoor circulation valve and the air supply port, thereby recycling the indoor oxygen and improving the indoor oxygen content. When the outdoor air quality is relatively poor, the indoor oxygen can be circulated indoors by slowly recovering the indoor oxygen, thereby ensuring the indoor air circulation and air quality, and having stronger practicality.

[0010] The technical solution adopted by the present invention to solve the above problems is: a fresh air fan with indoor oxygen recovery and reuse function, the structure of which includes a shell, a fresh air inlet, an exhaust outlet, an air supply port and a return air port, as well as a full heat exchange core. It also includes an oxygen compressor and a molecular sieve arranged on the shell and used to perform nitrogen and oxygen separation operations on the return air to obtain oxygen-enriched air, and an indoor circulation valve arranged in the shell and used to pass the oxygen-enriched air into the air supply port.

[0011] A further preferred technical solution is that: a photohydrogen purifier for purifying oxygen is further provided on the housing near the air supply port.

[0012] A further preferred technical solution is that: the oxygen compressor is provided with an oxygen supply pipe for connecting to the fresh air inlet.

[0013] A further preferred technical solution is that an oxygen supply valve is provided on the oxygen supply pipe.

[0014] A further preferred technical solution is that primary filters are provided on the fresh air inlet and the return air outlet.

[0015] A further preferred technical solution is that an induced draft air valve is provided at the fresh air inlet.

[0016] A further preferred technical solution is that a negative ion generator is provided at the return air outlet.

[0017] A further preferred technical solution is that: the shell is further provided with a bottom plate, and a buckle provided on the shell and used for engaging the bottom plate.

[0018] A further preferred technical solution is that a shock-absorbing rubber ring is provided at the bottom of the oxygen generator compressor.

[0019] A further preferred technical solution is that: the shell is provided with adhesive silencer cotton for wrapping around the oxygen generator compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural diagram of the present utility model.

[0021] Figure 2 This is a schematic diagram of the airflow direction of the fresh air mode of the present invention.

[0022] Figure 3 This is a schematic diagram of the airflow direction when the indoor circulation valve of the utility model is open.

[0023] Figure 4 This is a schematic diagram of the ventilation method of the fresh air fan in the prior art.

[0024] Figure 5 This is a schematic diagram of the air flow direction when the oxygen supply valve in the present invention is open.

[0025] Figure 6 This is a schematic diagram of the installation of the oxygen compressor in this utility model.

[0026] Figure 7 It is a partial exploded view of the utility model.

[0027] Figure 8 It is a front view of the utility model.

[0028] In the figure, the meanings of the marks are as follows:

[0029] Shell 11, fresh air inlet 12, exhaust outlet 13, air supply port 14, return air port 15, full heat exchange core 16, light hydrogen purifier 17, shock-absorbing rubber ring 18, adhesive silencer cotton 19, fan 20;

[0030] Oxygen compressor 1, molecular sieve 2, indoor circulation valve 3, oxygen supply pipe 4, oxygen supply valve 5, primary filter 6, induced draft valve 7, negative ion generator 8, bottom plate 9, buckle 10. DETAILED DESCRIPTION

[0031] The following description is merely a preferred embodiment of the present invention and is not intended to limit the scope of the present invention.

[0032] As attached Figure 1-8As shown, a fresh air fan with indoor oxygen recovery and reuse function includes a shell 11, a fresh air inlet 12, an exhaust outlet 13, an air supply port 14 and a return air port 15, as well as a full heat exchange core 16. It also includes an oxygen compressor 1 and a molecular sieve 2 arranged on the shell 11 and used to perform nitrogen and oxygen separation operations on the return air to obtain oxygen-enriched air, and an indoor circulation valve 3 arranged in the shell 11 and used to pass the oxygen-enriched air into the air supply port 14.

[0033] In this embodiment, the full heat exchange core 16 divides the fresh air inlet 12, the exhaust outlet 13, the supply air outlet 14, and the return air outlet 15 on the housing 11 into four major spaces. The full heat exchange core 16 has two vertically distributed air ducts, which are divided into: a fresh air channel for outdoor fresh air - the fresh air inlet 12 - the full heat exchange core 16 - the supply air outlet 14; and an exhaust duct for indoor dirty air - the return air outlet 15 - the full heat exchange core 16 - the exhaust air outlet 13 - the outdoor air. The full heat exchange core 16 not only divides the air ducts but also exchanges the temperature and humidity of the two air ducts, thereby achieving the effect of both ventilation and maintaining stable indoor temperature and humidity.

[0034] In addition, the fans 20 are respectively provided at the exhaust outlet 13 and the air supply outlet 14 for circulating indoor and outdoor air.

[0035] In addition, the oxygen compressor 1 and the molecular sieve 2 are existing equipment, and their function is to recover the oxygen component in the indoor air at the return air port 15. After the air is pressurized by the oxygen compressor 1, it passes through an air pretreatment device to remove solid impurities such as oil and dust, as well as water, and is cooled to room temperature. The treated compressed air enters the adsorption tower in the molecular sieve 2 through the air inlet valve, where nitrogen, carbon dioxide, etc. in the air are adsorbed, and high-purity oxygen flows out. The high-purity oxygen is input from the oxygen compressor 1 to the total heat exchange core 16 through a pipeline. When the adsorption tower reaches saturation, the air inlet valve closes and the flushing valve opens, and the adsorption tower enters the flushing stage. Afterwards, the flushing valve closes and the desorption valve opens to enter the desorption regeneration process, thus completing a cycle. Therefore, preferably, the oxygen compressor 1 is placed in the housing 11 and is connected to the air duct of the total heat exchange core 16; the molecular sieve 2 is connected to the oxygen compressor 1 through a pipeline and is placed outside the housing 11 with the electronic control. An oxygen concentration sensor can be added indoors. When the indoor oxygen content reaches the required level, the oxygen compressor 1 and the transport molecular sieve 2 are started and stopped intermittently to meet the indoor oxygen content requirement while reducing energy consumption.

[0036] Finally. Figure 3As shown, the indoor circulation valve 3 serves as an air flow control valve. Its function is to close the fan 20 at the exhaust outlet 13, open the fan 20 and the indoor circulation valve 3 at the air supply outlet 14, and turn on the oxygen compressor 1 and the molecular sieve 2, so that the oxygen in the air at the return air outlet 15 is recovered and refined, and then transported to the air supply outlet 14 through the full heat exchange core 16 and the indoor circulation valve 3, and then transported to the indoor room. The flow rate can be appropriately reduced in the internal circulation mode. When the outdoor air quality is good, in order to save energy, the indoor circulation valve 3 can be closed, so that the fresh air blower is as shown in the attached figure. Figure 4 As shown, the existing fresh air state is carried out.

[0037] A photohydrogen purifier 17 for purifying oxygen is further provided on the housing 11 near the air supply port 14 .

[0038] In this embodiment, the function of the photohydrogen purifier 17 is to sterilize the air to be transported into the room, and an existing ultraviolet sterilization lamp can be used.

[0039] The oxygen compressor 1 is provided with an oxygen supply pipe 4 for connecting to the fresh air inlet 12 .

[0040] In this embodiment, the oxygen supply pipe 4 is provided on the oxygen compressor 1. After being sieved by the molecular sieve 2, the high-concentration oxygen enters the compressor 1 and is transported by the oxygen supply pipe 4 to the fresh air inlet 12. Together with the air from the fresh air inlet 12, it enters the room, thereby recovering the oxygen in the exhaust air and increasing the oxygen content in the room. The oxygen compressor 1 can recover all or part of the exhaust gas.

[0041] The oxygen supply pipe 4 is provided with an oxygen supply valve 5 .

[0042] In this embodiment, the oxygen supply valve 5 is used to control the flow rate of the oxygen supply tube 4 and select the air content and circulation mode.

[0043] The fresh air inlet 12 and the return air outlet 15 are provided with primary filter screens 6 .

[0044] In this embodiment, outdoor fresh air is filtered through the three-layer filter section (primary filter + activated carbon + high-efficiency) of the primary filter 6, passes through the full heat exchange core 16, and then sterilizes and disinfects itself in the solar hydrogen purifier 17 before flowing to the air supply 14. The primary filter 6 at the return air vent 15 also performs preliminary filtration of turbid indoor air. Consumable parts such as the fan 20 and the primary filter 6 are mounted using snap-on mounting for easy maintenance and replacement.

[0045] An induced air valve 7 is provided at the position of the fresh air inlet 12 .

[0046] In this embodiment, the function of the induced draft air valve 7 is to control the air volume of the fresh air inlet 12 to prevent outdoor air from entering the room through the fresh air inlet 12 when no air circulation or indoor circulation is required, thereby affecting the indoor air quality.

[0047] A negative ion generator 8 is provided at the position of the return air outlet 15 .

[0048] In this embodiment, the negative ion generator 8 is used to activate oxygen in the air, which can remove dust to a certain extent.

[0049] The housing 11 is further provided with a bottom plate 9 and a buckle 10 provided on the housing 11 and used for engaging the bottom plate 9 .

[0050] In this embodiment, the base plate 9 is provided on the shell 11 for covering the shell 11 , and the buckle 10 is used to fix the base plate 9 so that the base plate 9 can be flexibly disassembled and assembled, facilitating installation, replacement and maintenance of the internal structure.

[0051] A shock-absorbing rubber ring 18 is provided at the bottom of the oxygen compressor 1 .

[0052] In this embodiment, the oxygen compressor 1 and the molecular sieve 2 are designed to be split. The oxygen compressor 1 is installed in a separate sheet metal box, and a shock-absorbing rubber ring 18 is provided at the base to effectively absorb vibration and reduce the noise generated by the vibration of the oxygen compressor 1 to a certain extent.

[0053] The shell 11 is provided with adhesive silencer cotton 19 for wrapping around the oxygen compressor 1 .

[0054] In this embodiment, the adhesive silencer cotton 19 is located around the sheet metal box of the oxygen compressor 1, protecting the oxygen compressor 1 while reducing noise pollution. The oxygen compressor 1 is installed on the inside of the fresh air fan cavity using rivet nuts, which is convenient for disassembly while isolating noise.

[0055] While the embodiments of the present invention have been described in detail above with reference to the accompanying drawings, the present invention is not limited to the embodiments described above. Various modifications are possible within the scope of knowledge possessed by a person skilled in the art without departing from the spirit of the present invention. These modifications are non-inventive and are protected by patent law as long as they fall within the scope of the claims of the present invention.

Claims

1. A fresh air blower with indoor oxygen recovery and reuse function, comprising a housing (11), a fresh air inlet (12), an exhaust outlet (13), an air supply outlet (14), a return air outlet (15), and a full heat exchange core (16), characterized in that: It also includes an oxygen compressor (1) and a molecular sieve (2) arranged on the shell (11) and used to perform nitrogen and oxygen separation operations on the return air to obtain oxygen-enriched air, and an indoor circulation valve (3) arranged in the shell (11) and used to pass the oxygen-enriched air into the air supply port (14).

2. The fresh air blower with indoor oxygen recovery and reuse function according to claim 1, characterized in that: A photohydrogen purifier (17) for purifying oxygen is also provided on the housing (11) near the air supply port (14).

3. The fresh air blower with indoor oxygen recovery and reuse function according to claim 1, characterized in that: The oxygen compressor (1) is provided with an oxygen supply pipe (4) for connecting to the fresh air inlet (12).

4. The fresh air blower with indoor oxygen recovery and reuse function according to claim 3, characterized in that: The oxygen supply pipe (4) is provided with an oxygen supply valve (5).

5. The fresh air blower with indoor oxygen recovery and reuse function according to claim 1, characterized in that: The fresh air inlet (12) and the return air outlet (15) are provided with a primary filter (6).

6. The fresh air blower with indoor oxygen recovery and reuse function according to claim 1, characterized in that: An induced air valve (7) is provided at the position of the fresh air inlet (12).

7. The fresh air blower with indoor oxygen recovery and reuse function according to claim 1, characterized in that: A negative ion generator (8) is provided at the position of the return air outlet (15).

8. The fresh air blower with indoor oxygen recovery and reuse function according to claim 1, characterized in that: The housing (11) is also provided with a bottom plate (9), and a buckle (10) arranged on the housing (11) and used for engaging the bottom plate (9).

9. The fresh air blower with indoor oxygen recovery and reuse function according to claim 1, characterized in that: A shock-absorbing rubber ring (18) is provided at the bottom of the oxygen compressor (1).

10. The fresh air blower with indoor oxygen recovery and reuse function according to claim 1, characterized in that: The housing (11) is provided with adhesive silencer cotton (19) for wrapping around the oxygen compressor (1).

Images