Single-fan fresh air fan

Abstract

The utility model relates to a fresh air machine, especially a single-fan fresh air machine. The single-fan fresh air machine has a single fan, and a supply air passage and an exhaust air passage that are independent of each other. The fan includes a fan wheel, and the fan wheel includes a supply air section and an exhaust air section arranged along the direction of the rotating shaft. The supply air section is located in the supply air passage and used to generate a supply air flow. The exhaust air section is located in the exhaust air passage and used to generate an exhaust air flow. The single-fan fresh air machine can generate a bidirectional flow through a single fan.

Description

Technical Field

[0001] This utility model relates to a fresh air fan, and more particularly to a single-fan fresh air fan. Background Technology

[0002] A fresh air system is an air purification device that generates bidirectional airflow. On one hand, it exhausts stale indoor air to the outside, and on the other hand, it introduces fresh outdoor air into the room, thus circulating and exchanging indoor and outdoor air. Currently, most fresh air systems on the market have two fans: one fan is used to introduce outdoor air into the room, and the other fan is used to exhaust indoor air to the outside.

[0003] Dual-fan fresh air systems are expensive, bulky, and structurally complex. If a single fan could generate bidirectional airflow, the cost of the fresh air system could be reduced, and its structure simplified. Utility Model Content

[0004] The technical problem to be solved by this invention is: how to generate bidirectional flow using a single fan.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: A single-fan fresh air system has a single fan and independent air supply and exhaust ducts; the fan includes a fan wheel, and the fan wheel includes an air supply section and an exhaust section arranged along the rotation axis; the air supply section is located in the air supply duct and is used to generate air supply airflow; the exhaust section is located in the exhaust duct and is used to generate exhaust airflow.

[0006] Preferably, the single-fan fresh air unit includes a total heat exchange core, which has a first channel and a second channel that are independent of each other. The air supply channel includes the first channel, and the air exhaust channel includes the second channel.

[0007] Preferably, the single-fan fresh air unit includes a casing, a fan and a total heat exchange core disposed inside the casing. The casing has an air supply outlet, an air exhaust outlet, a fresh air inlet and a return air outlet. The air supply duct connects the fresh air inlet and the air supply outlet, and the air supply airflow flows from the fresh air inlet to the air supply outlet. The air exhaust duct connects the return air outlet and the air exhaust outlet, and the air exhaust airflow flows from the return air outlet to the air exhaust outlet.

[0008] Preferably, the air supply outlet is located on the upper side of the chassis, the exhaust outlet and fresh air inlet are located on the rear side of the chassis, and the return air inlet is located on the front side of the chassis; the exhaust outlet, fresh air inlet and total heat exchange core are located at the lower part of the chassis, and the return air inlet and fan are located at the upper part of the chassis.

[0009] Preferably, the single-fan fresh air unit includes a fresh air high-efficiency filter, a fresh air pre-filter, and a return air pre-filter; the fresh air pre-filter is located between the fresh air inlet and the total heat exchange core, the fresh air high-efficiency filter is located at the air supply outlet, and the return air pre-filter is located at the return air outlet.

[0010] Preferably, the chassis includes a mounting bracket with a first mounting position and a second mounting position. The total heat exchange core is inserted into the first mounting position, and the fresh air primary filter is inserted into the second mounting position. The inlet of the first channel is located on the first side of the total heat exchange core, and the fresh air primary filter is arranged close to and parallel to the first side.

[0011] Preferably, the chassis includes an exhaust volute, a partition, and an air supply volute arranged in sequence. The exhaust volute is connected to the return air inlet and the exhaust air outlet, respectively, and the air supply volute is connected to the fresh air inlet and the air supply outlet, respectively. The partition has a clearance opening, and the impeller passes through the clearance opening. The air supply section is located inside the air supply volute, and the air exhaust section is located inside the exhaust volute.

[0012] Preferably, the fan includes a motor and an integrally formed impeller, and includes a partition located between the exhaust section and the supply section, the partition being connected to the motor.

[0013] Preferably, the air supply section includes air supply blades, and the air exhaust section includes air exhaust blades, with the air supply blades and air exhaust blades being staggered along the circumference of the impeller.

[0014] Preferably, the length ratio of the air supply section and the exhaust section along the rotation axis is 1:1, a:1, or 1:b. <a<2,1<b<2。

[0015] The beneficial effects of this utility model are as follows: The single-fan fresh air unit provided by this utility model has independent air supply and exhaust channels. The impeller includes an air supply section located in the air supply channel and an exhaust section located in the exhaust channel. When the impeller rotates, the air supply section generates air supply airflow in the air supply channel, and the exhaust section generates air exhaust airflow in the exhaust channel. Therefore, this single-fan fresh air unit can generate bidirectional flow through a single fan. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a single-fan fresh air unit structure according to an embodiment of the present invention. Figure 1 ; Figure 2 The explosion of the single-fan fresh air unit in this embodiment. Figure 1 ; Figure 3 This is a schematic diagram of the single-fan fresh air unit structure in this embodiment. Figure 2 ; Figure 4 The explosion of the single-fan fresh air unit in this embodiment. Figure 2 ; Figure 5 for Figure 4 Exploded view of component 100; Figure 6 for Figure 5 Exploded view of component 200; Figure 7 for Figure 5 Top view of component 200; Figure 8 for Figure 7 AA section view of component 200; Figure 9 for Figure 7 BB section view of component 200; Figure 10 This is a cross-sectional view of the wind turbine in this embodiment; Figure 11 This is a schematic diagram of the total heat exchange core structure of this embodiment; Figure 12 This is a cross-sectional view of the chassis in this embodiment.

[0017] Label Explanation: 1. Chassis; 2. Total heat exchange core; 3. Fresh air high-efficiency filter; 4. Return air pre-filter; 5. Fresh air pre-filter; 6. Fan wheel; 7. Motor; 11. Fresh air inlet; 12. Exhaust air outlet; 13. Supply air outlet; 14. Return air outlet; 15. Partition; 16. Mounting bracket; 17. Exhaust volute; 18. Supply air volute; 19. Fixing bracket; 21. First channel; 22. Second channel; 31. First mounting slot; 41. Second mounting slot; 61. Exhaust section; 62. Supply section; 63. Partition; 151, yielding port; 171, second connecting port; 181, first connecting port. Detailed Implementation

[0018] To explain in detail the technical content, objectives, and effects of this utility model, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0019] Most fresh air systems on the market require two fans to generate bidirectional airflow. This bidirectional airflow includes supply airflow from outdoors to indoors, and exhaust airflow from indoors to outdoors. A fan typically consists of a motor and a rotor. The motor drives the rotor to rotate, generating airflow. The direction of the airflow is determined by the rotor's rotation direction and the direction of the blades. Besides the fans, fresh air systems also include devices for temperature regulation and for filtering pollutants. A total heat exchange core is a temperature regulation device with independent first and second channels. Supply and exhaust airflows can pass through the first and second channels respectively without crosstalk. A total heat exchange core is typically a regular cube shape with six sides, four of which are respectively located as the inlet, outlet, inlet, and outlet of the first and second channels.

[0020] The single-fan fresh air system provided by this utility model can generate bidirectional flow with only one fan. Compared with the dual-fan fresh air system, it has a simpler structure, smaller size and lower cost.

[0021] Please refer to Figure 1 and Figure 2 The single-fan fresh air unit provided by this utility model has a single fan, as well as independent air supply and exhaust ducts. Please refer to... Figures 3 to 6 The wind turbine includes the impeller 6, please refer to... Figures 7 to 10 The impeller 6 includes an air supply section 62 and an exhaust section 61 arranged along its rotation axis. The air supply section 62 is located in the air supply channel and is used to generate air supply airflow; the exhaust section 61 is located in the exhaust channel and is used to generate exhaust airflow.

[0022] As can be seen from the above description, the beneficial effects of this utility model are as follows: This single-fan fresh air unit has independent supply and exhaust air ducts. The impeller 6 includes a supply air section 62 located in the supply air duct and an exhaust air section 61 located in the exhaust air duct. When the impeller 6 rotates, the supply air section 62 generates supply airflow in the supply air duct, and the exhaust air section 61 generates exhaust airflow in the exhaust air duct. Therefore, this single-fan fresh air unit can generate bidirectional flow through a single fan.

[0023] Preferably, please refer to Figure 11 The total heat exchange core 2 has a first channel 21 and a second channel 22 that are independent of each other. The air supply channel includes the first channel 21 and the air exhaust channel includes the second channel 22.

[0024] As can be seen from the above description, the supply airflow and the exhaust airflow pass through the total heat exchange core 2 from the first channel 21 and the second channel 22 respectively, enabling the single-fan fresh air unit to regulate the temperature of the supply airflow.

[0025] If needed, the temperature of the supply airflow can also be regulated by other existing devices.

[0026] Preferably, please refer to Figure 1 and Figure 3 The single-fan fresh air unit includes a casing 1, with a fan and a total heat exchange core 2 housed within the casing 1. The casing 1 has an air supply outlet 13, an air exhaust outlet 12, a fresh air inlet 11, and a return air inlet 14. An air supply duct connects the fresh air inlet 11 to the air supply outlet 13, and the airflow flows from the fresh air inlet 11 to the air supply outlet 13. An exhaust duct connects the return air inlet 14 to the exhaust outlet 12, and the exhaust airflow flows from the return air inlet 14 to the exhaust outlet 12.

[0027] Preferably, the air supply outlet 13 is located on the upper side of the chassis 1, the exhaust outlet 12 and the fresh air inlet 11 are located on the rear side of the chassis 1, and the return air inlet 14 is located on the front side of the chassis 1. The exhaust outlet 12, the fresh air inlet 11 and the total heat exchange core 2 are located at the lower part of the chassis 1, and the return air inlet 14 and the fan are located at the upper part of the chassis 1.

[0028] As described above, the chassis 1 can be installed against the rear wall, with one hole on the wall corresponding to the exhaust vent 12 and the fresh air vent 11. The air supply vent 13 is located on the upper side of the chassis 1, allowing the airflow to exit the chassis 1 from a higher position.

[0029] Preferably, please refer to Figure 4 and Figure 5 The single-fan fresh air system includes a fresh air high-efficiency filter 3, a fresh air pre-filter 5, and a return air pre-filter 4. The fresh air pre-filter 5 is located between the fresh air inlet 11 and the total heat exchange core 2, the fresh air high-efficiency filter 3 is located at the air supply outlet 13, and the return air pre-filter 4 is located at the return air outlet 14.

[0030] As described above, outdoor air passes through the pre-filter 5 before passing through the heat exchange core 2, effectively blocking large particles. After being conditioned by the heat exchange core 2, the air is further filtered by the high-efficiency fresh air filter 3 before being delivered from the air outlet 13, thus improving the cleanliness of the supply airflow. The return air pre-filter 4 further enhances the cleanliness of the exhaust airflow.

[0031] Preferably, please refer to Figure 5 and Figure 6 The chassis 1 includes a mounting bracket 16, which has a first mounting position and a second mounting position. The total heat exchange core 2 is inserted into the first mounting position, and the fresh air primary filter 5 is inserted into the second mounting position. The inlet of the first channel 21 is located on the first side of the total heat exchange core 2, and the fresh air primary filter 5 is arranged close to and parallel to the first side.

[0032] Preferably, please refer to Figures 6 to 9 , Figure 12 The chassis 1 includes an exhaust volute 17, a partition 15, and an air supply volute 18 arranged sequentially. The exhaust volute 17 is connected to the return air inlet 14 and the exhaust air outlet 12, respectively. The air supply volute 18 is connected to the fresh air inlet 11 and the air supply outlet 13, respectively. The partition 15 has a clearance opening 151, through which the impeller 6 passes. The air supply section 62 is located inside the air supply volute 18, and the exhaust section 61 is located inside the exhaust volute 17.

[0033] Preferably, please refer to Figure 2 , Figure 6 and Figure 10 The fan includes a motor 7, which is fixed on a mounting frame 19. The impeller 6 is integrally formed and includes a partition 63 located between the exhaust section 61 and the supply section 62. The partition 63 is connected to the motor 7.

[0034] As can be seen from the above description, in addition to providing a place for the motor 7 to be connected, the partition 63 also serves to separate the internal space of the air supply volute 18 from the internal space of the air exhaust volute 17.

[0035] If necessary, the exhaust section 61 and the air supply section 62 can also be respectively connected to the shaft of the motor 7, and only one hole for the shaft of the motor 7 to pass through is reserved on the partition 15.

[0036] Preferably, please refer to Figure 10 , the air supply section 62 includes air supply blades, the exhaust section 61 includes exhaust blades, and the air supply blades and the exhaust blades are arranged in a staggered manner along the circumferential direction of the wind wheel 6.

[0037] It can be seen from the above description that arranging the air supply blades and the exhaust blades in a staggered manner along the circumferential direction of the wind wheel 6 can reduce the noise when the single-fan fresh air ventilator operates.

[0038] Preferably, for places sensitive to air pressure such as ordinary residences, offices and commercial spaces, the axial dimension ratio of the air supply section 62 to the exhaust section 61 is 1:1 to maintain air pressure balance.

[0039] Preferably, for places with poor air quality that require dust prevention or moisture prevention, please refer to Figure 10 , the axial dimension ratio of the air supply section 62 to the exhaust section 61 is a:1, 1<a<2, forming a slight positive pressure, where the air pressure is slightly higher than that outside the site, so as to prevent pollutants from entering the site.

[0040] Preferably, for places requiring rapid exhaust such as kitchens, laboratories and bathrooms, the axial dimension ratio of the air supply section 62 to the exhaust section 61 is 1:b, 1<b<2, forming a slight negative pressure, where the air pressure is slightly lower than that outside the site, so as to prevent peculiar smell from diffusing outside the site.

[0041] Please refer to Figures 1 to 11 , an embodiment of the present utility model is: Please refer to Figure 1 and Figure 2 , a single-fan fresh air ventilator comprises a chassis 1, a fan and a total heat exchange core 2. The single-fan fresh air ventilator has mutually independent air supply channels and exhaust channels, and the separation of the air supply channels and the exhaust channels is realized by means of a partition 15 of the chassis 1 and the like. An air supply outlet 13 is arranged on the upper side of the chassis 1, and the air supply outlet 13 comprises a plurality of strip-shaped holes. An exhaust outlet 12 and a fresh air inlet 11 are arranged on the rear side of the chassis 1, an air return outlet 14 is arranged on the front side of the chassis 1, and the air return outlet 14 comprises a plurality of small circular holes. The exhaust outlet 12, the fresh air inlet 11 and the total heat exchange core 2 are located at the lower part of the chassis 1, and the air return outlet 14 and the fan are located at the upper part of the chassis 1. The air supply channel connects the fresh air inlet 11 and the air supply outlet 13, and the supply airflow flows from the fresh air inlet 11 to the air supply outlet 13. The exhaust channel connects the air return outlet 14 and the exhaust outlet 12, and the exhaust airflow flows from the air return outlet 14 to the exhaust outlet 12.

[0042] Please refer to Figure 5 and Figure 6 , the fan comprises a motor 7 and a wind wheel 6, please refer to Figure 10, the wind wheel 6 comprises an air supply section 62, a partition portion 63 and an exhaust section 61 which are sequentially arranged along the rotation axis direction of the wind wheel, the partition portion 63 is provided with a convex portion protruding backward, and the convex portion is connected with the motor 7. The air supply section 62 comprises a plurality of curved air supply blades, the exhaust section 61 comprises a plurality of curved exhaust blades, and the air supply blades and the exhaust blades are arranged in a staggered manner along the circumferential direction of the wind wheel 6. Refer to Figure 2 , a fixing frame 19 is provided at the rear side of the air supply volute 18, and the motor 7 is fixed on the fixing frame 19.

[0043] Refer to Figures 6 to 9 , an exhaust volute 17 and an air supply volute 18 are provided at the upper part of the chassis 1, a partition plate 15 is provided between the exhaust volute 17 and the air supply volute 18, the partition plate 15 is provided with an abdicating opening 151, the wind wheel 6 is penetrated in the abdicating opening 151, and the diameter of the abdicating opening 151 can be equal to or slightly larger than the diameter of the wind wheel 6. The air supply section 62 is located in the air supply volute 18 and configured to generate supply air flow, and the exhaust section 61 is located in the exhaust volute 17 and configured to generate exhaust air flow. Refer to Figure 12 , a first communication opening 181 is provided at the rear side of the air supply volute 18, the first communication opening 181 is communicated with a fresh air inlet 11, and the upper side of the air supply volute 18 is communicated with an air supply outlet 13. A second communication opening 171 is provided at the front side of the exhaust volute 17, the second communication opening 171 is communicated with an air return inlet 14, and the lower side of the exhaust volute 17 is communicated with an exhaust outlet 12.

[0044] Refer to Figure 12 , a first installation groove 31 is provided between the upper side of the air supply volute 18 and the air supply outlet 13, and the high-efficiency fresh air filter screen 3 is arranged in the first installation groove 31. A second installation groove 41 is provided between the front side of the exhaust volute 17 and the air return inlet 14, and the primary-efficiency return air filter screen 4 is arranged in the second installation groove 41. An installation frame 16 is provided at the lower part of the chassis 1, the installation frame 16 is provided with a first installation position and a second installation position, the total heat exchange core 2 is inserted into the first installation position, and the primary-efficiency fresh air filter screen 5 is inserted into the second installation position. The inlet of the first channel 21 is located at the first side surface of the total heat exchange core 2, the primary-efficiency fresh air filter screen 5 is arranged close to and parallel to the first side surface, and the primary-efficiency fresh air filter screen 5 is arranged obliquely relative to the bottom plate of the chassis 1.

[0045] Refer to Figure 11 , the total heat exchange core 2 is provided with a first channel 21 and a second channel 22 which are independent from each other, the air supply channel comprises the first channel 21, and the exhaust channel comprises the second channel 22.

[0046] The single-fan fresh air machine is suitable for sites with poor air quality that require dust prevention or moisture prevention, refer to Figure 10 , the axial dimension ratio of the air supply section 62 to the exhaust section 61 is a:1, 1<a<2, forming a micro-positive pressure, the air pressure is slightly higher than that outside the site, which can prevent pollutants from entering the site.

[0047] After the fan is started, refer to Figure 8 , on one hand, the air exhaust section 61 of the wind wheel 6 agitates the air in the exhaust volute 17 to generate an exhaust airflow, and the exhaust airflow sequentially flows through the return air inlet 14, the primary return air filter screen 4, the second communication port 171, the internal space of the exhaust volute 17, the second channel 22, and the air exhaust outlet 12. Please refer to Figure 9 , on the other hand, the air supply section 62 of the wind wheel 6 agitates the air in the supply volute 18 to generate a supply airflow, and the supply airflow sequentially flows through the fresh air inlet 11, the primary fresh air filter screen 5, the first channel 21, the first communication port 181, the internal space of the supply volute 18, the high-efficiency fresh air filter screen 3, and the air supply outlet 13.

[0048] In summary, the single-fan fresh air unit provided by the present utility model can generate bidirectional flow through a single fan, the supply airflow and the exhaust airflow pass through the total heat exchange core 2 from the first channel 21 and the second channel 22 respectively, so that the single-fan fresh air unit can realize temperature regulation for the supply airflow. The axial dimension ratio of the air supply section 62 to the air exhaust section 61 is designed according to site requirements, when the ratio is different, the position of the partition part 63 on the wind wheel 6 is different, and therefore the front-rear position of the partition plate 15 in the chassis 1 is also different. For air pressure-sensitive sites such as ordinary residences, offices and commercial spaces, the ratio can be designed to 1:1 to maintain air pressure balance. For sites with poor air quality that require dust prevention or moisture protection, the ratio can be designed as a:1, wherein 1<a<2, to prevent pollutants from entering the site. For sites requiring rapid exhaust such as kitchens, laboratories and bathrooms, the ratio can be designed as 1:b, wherein 1<b<2, to prevent peculiar smells from diffusing to outside the site.

[0049] The above description is only the embodiments of the present utility model, and does not therefore limit the patent scope of the present utility model. Any equivalent transformation made by using the contents of the description and drawings of the present utility model, whether directly or indirectly applied in the relevant technical field, is similarly included in the patent protection scope of the present utility model.

Claims

1. A single-fan fresh air system, characterized in that: It has a single fan, as well as independent air supply and exhaust ducts; The fan includes a wind turbine, which includes an air supply section and an air exhaust section arranged along the rotation axis; the air supply section is located in the air supply channel and is used to generate air supply airflow; the air exhaust section is located in the air exhaust channel and is used to generate air exhaust airflow.

2. The single-fan fresh air system as described in claim 1, characterized in that: It includes a total heat exchange core, which has a first channel and a second channel that are independent of each other. The air supply channel includes the first channel and the air exhaust channel includes the second channel.

3. The single-fan fresh air system as described in claim 2, characterized in that: The device includes a chassis, in which the fan and the total heat exchange core are housed. The chassis has an air supply outlet, an air exhaust outlet, a fresh air inlet, and a return air outlet. An air supply duct connects the fresh air inlet to the air supply outlet, and the air supply airflow flows from the fresh air inlet to the air supply outlet. An exhaust duct connects the return air outlet to the exhaust outlet, and the exhaust airflow flows from the return air outlet to the exhaust outlet.

4. The single-fan fresh air system as described in claim 3, characterized in that: The air supply outlet is located on the upper side of the chassis, the exhaust outlet and fresh air inlet are located on the rear side of the chassis, and the return air inlet is located on the front side of the chassis; the exhaust outlet, fresh air inlet and total heat exchange core are located at the lower part of the chassis, and the return air inlet and fan are located at the upper part of the chassis.

5. The single-fan fresh air system as described in claim 3, characterized in that: This includes a high-efficiency fresh air filter, a pre-filter for fresh air, and a pre-filter for return air. The fresh air pre-filter is located between the fresh air inlet and the total heat exchange core, the fresh air high-efficiency filter is located at the air supply outlet, and the return air pre-filter is located at the return air inlet.

6. The single-fan fresh air system as described in claim 5, characterized in that: The chassis includes a mounting frame, which has a first mounting position and a second mounting position. The total heat exchange core is inserted into the first mounting position, and the fresh air primary filter is inserted into the second mounting position. The inlet of the first channel is located on the first side of the total heat exchange core, and the fresh air primary filter is arranged close to and parallel to the first side.

7. The single-fan fresh air system as described in claim 3, characterized in that: The chassis includes an exhaust volute, a partition, and an air supply volute arranged in sequence. The exhaust volute is connected to the return air inlet and the exhaust air outlet, respectively, and the air supply volute is connected to the fresh air inlet and the air supply outlet, respectively. The partition has a clearance opening, and the impeller passes through the clearance opening. The air supply section is located inside the air supply volute, and the air exhaust section is located inside the exhaust volute.

8. The single-fan fresh air system as described in claim 1, characterized in that: The fan includes a motor, and the impeller is integrally formed, including a partition located between the exhaust section and the supply section, the partition being connected to the motor.

9. The single-fan fresh air system as described in claim 1, characterized in that: The air supply section includes air supply blades, and the air exhaust section includes air exhaust blades. The air supply blades and the air exhaust blades are staggered along the circumference of the impeller.

10. The single-fan fresh air system as described in claim 1, characterized in that: The length ratio of the supply air section and the exhaust air section along the rotation axis is 1:1, a:1, or 1:b. <a<2,1<b<2。

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