Ventilation system with heat exchange function
By introducing ceramic heat exchangers and bidirectional fans into the ventilation system, the two-way flow and heat exchange of air are achieved, and the energy loss problem of existing ventilation equipment is solved, improving energy saving effect and air quality.
Patent Information
- Application Number
- CN202422559548.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-23
- Publication Date
- 2025-08-19
- Estimated Expiration
- 2034-10-23
AI Technical Summary
Existing ventilation equipment has serious energy loss during use, especially in summer and winter, when air conditioning or heating equipment is running, indoor air quality is poor and energy consumption increases.
A two-way fan system with ceramic heat exchanger is adopted to realize the two-way flow of air through forward and reverse control, and a ceramic heat exchanger is installed in the ventilation duct for heat exchange, combining a filtration system to ensure air quality.
It realizes the recovery and reuse of heat during ventilation, significantly reduces energy losses, maintains stable indoor temperature, improves air quality and comfort, and reduces energy consumption.
Smart Images
Figure CN223242928U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to ventilation equipment, in particular to a ventilation system with a heat exchange function. Background Art
[0002] Indoor air quality plays a crucial role in our daily lives, impacting our health and comfort. To maintain good air quality, ventilation devices, such as fans, are often used to expel stale air and draw in fresh air. However, with the increasing demand for environmental comfort in modern life, especially when using air conditioning or heating equipment, ventilation devices have exposed some significant shortcomings and deficiencies.
[0003] Especially in the summer, when people use air conditioning to cool down their homes, they often keep doors and windows closed to maintain a cool environment. However, keeping doors and windows closed for extended periods of time can gradually reduce the oxygen content in the indoor air and cause pollutants such as carbon dioxide to accumulate, resulting in poor air quality and health risks. Similarly, in the cold winter, heating devices such as air conditioners and heaters are widely used. To maintain indoor warmth, people also tend to keep doors and windows closed, resulting in similar air stagnation and causing a series of air quality issues, such as dry air and increased carbon dioxide levels.
[0004] While ventilation equipment can effectively improve indoor air quality, its use suffers from a significant drawback: significant energy loss. Traditional ventilation equipment lacks effective heat exchange, and when exhausting polluted indoor air, it removes a significant amount of heat or cooling energy. This means that in the summer, the air cooled by air conditioning is exhausted outdoors along with the air; in the winter, the heat generated by heating equipment is also dissipated with the exhausted air. While this improves indoor air circulation, it wastes a significant amount of energy, increasing the operating load of air conditioning and heating equipment, significantly increasing energy consumption, and negatively impacting the environment.
[0005] Therefore, achieving efficient ventilation while minimizing energy loss has become a pressing technical challenge facing existing technologies. In the current context of energy conservation and environmental protection, developing ventilation equipment with heat exchange capabilities that can recover indoor heat or cold air during exhaust and reuse it in incoming fresh air to reduce energy waste is particularly important, and further improvements are necessary. Utility Model Content
[0006] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a ventilation system with a simple structure, easy to use, and capable of performing efficient heat exchange during the ventilation process, which can not only maintain indoor air quality but also significantly reduce energy loss. A ventilation system with heat exchange function and its control method.
[0007] The purpose of the utility model is achieved by the following methods: a ventilation system with heat exchange function, which includes a ventilation duct; the ventilation duct is connected to an indoor air outlet installed indoors, and is connected to an outdoor air outlet outdoors;
[0008] Bidirectional fan: The bidirectional fan is connected in series in the ventilation duct. The bidirectional fan sucks air from the outdoor air outlet through reverse rotation and discharges it into the room through the indoor air outlet; the bidirectional fan sucks air from the indoor air outlet through forward rotation and discharges it outdoors through the outdoor air outlet.
[0009] Ceramic heat exchanger: The ceramic heat exchanger is installed on the indoor air outlet. There are several heat exchange holes arranged axially on the ceramic heat exchanger. When the bidirectional fan is working, it pushes the air through the heat exchange holes for heat exchange.
[0010] Furthermore: the bidirectional fan includes a drive motor, a rotating shaft extends from the front and rear ends of the drive motor, and a front fan blade and a rear fan blade are respectively installed at the front and rear ends of the drive motor through the rotating shaft.
[0011] Furthermore: the front fan blades and the rear fan blades are mixed flow fan blades.
[0012] Furthermore, the ceramic heat exchanger includes a heat exchange inner shell and a heat exchange outer shell sleeved thereon, the heat exchange outer shell is connected to the ventilation duct, and a ceramic heat exchange core is fixedly installed in the heat exchange inner shell.
[0013] Furthermore: both ends of the ceramic heat exchange core are covered with filters.
[0014] Furthermore: the filter is fixed on the inner hole of the heat exchange liner through a mounting bracket.
[0015] Furthermore: the indoor air outlet and the outdoor air outlet are covered with an air inlet net, and the air inlet net includes a plurality of concentric support rings, and adjacent support rings are connected by a plurality of radially distributed ribs, and the side walls of the ribs are inclined inward.
[0016] Furthermore: a card slot is provided on the outer circumference of the air inlet net, and correspondingly, a buckle that cooperates with the card slot is provided on the indoor air outlet or the outdoor air outlet. The air inlet net is rotated so that the card slot and the buckle overlap or separate, thereby realizing the installation and disassembly of the air inlet net.
[0017] The beneficial effects of the utility model are: 1. Simple structure, low production cost and improved market competitiveness.
[0018] 2. This utility model implements heat exchange during the air discharge and intake processes by introducing a ceramic heat exchanger into the ventilation system. The ceramic heat exchanger's porous structure effectively stores and transfers heat during air circulation. In summer, cold air is not lost during ventilation, but is recovered through the heat exchanger and transferred to the incoming fresh air. Similarly, in winter, indoor heat is retained by the heat exchanger, reducing the impact of the indoor and outdoor temperature differences on the indoor temperature, significantly reducing energy consumption for air conditioning or heating equipment, and improving overall energy savings.
[0019] 3. This ventilation system effectively maintains a relatively stable indoor temperature during ventilation, preventing drastic fluctuations in room temperature caused by frequent ventilation. Conventional ventilation systems often cause the room temperature to drop or rise rapidly during operation, affecting occupants' comfort. This new ventilation system, however, uses heat exchange to adjust the temperature of exhaust air and incoming fresh air, bringing the fresh air closer to room temperature before entering the room. This maintains a balanced indoor temperature and improves living comfort.
[0020] 4. This utility model utilizes a bidirectional fan, achieving two-way air flow through forward and reverse rotation control. When rotating forward, the fan exhausts contaminated indoor air to the outside; when rotating reversely, it draws in fresh outdoor air for heat exchange through the heat exchanger. This design not only simplifies the structure but also improves the system's ventilation efficiency. Furthermore, the bidirectional fan's forward and reverse rotation times and intervals can be flexibly adjusted as needed, further enhancing the system's intelligence.
[0021] 5. The ventilation system of this utility model features a highly practical structural design. For example, the air inlet screen utilizes a snap-on and slot-type installation method, allowing users to remove and install the screen with a simple rotation, making it convenient for cleaning or replacement. The modular design of the ceramic heat exchanger and filter facilitates maintenance and replacement, ensuring long-term, efficient operation of the system while reducing maintenance costs.
[0022] 6. The system not only recycles energy during ventilation, but also incorporates filters at both ends of the ceramic heat exchanger to effectively filter dust, particulate matter, and other impurities from the outside air, preventing them from entering the room. This significantly improves the cleanliness of the incoming air. This feature not only significantly enhances energy conservation, but also improves air quality, providing users with a healthier indoor environment. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 This is a schematic diagram of the general assembly of the utility model structure.
[0024] Figure 2This is a cross-sectional view of the general assembly structure of the utility model.
[0025] Figure 3 In this utility model Figure 2 A magnified view of the structure of part A.
[0026] Figure 4 In this utility model Figure 2 Enlarged view of the structure of part B.
[0027] Figure 5 In this utility model Figure 2 Enlarged view of the C part structure.
[0028] Figure 6 Exploded view of the structure of the ceramic heat exchanger in this utility model.
[0029] Figure 7 Schematic diagram of the air inlet network structure in the utility model. DETAILED DESCRIPTION
[0030] The present invention is further described below in conjunction with the accompanying drawings. A ventilation system with heat exchange function includes a ventilation duct 1; the ventilation duct 1 is connected to an indoor air outlet 2 installed indoors, and is connected to an outdoor air outlet 3 outdoors;
[0031] Two-way fan 4: The two-way fan 4 is connected in series in the ventilation duct 1. The two-way fan 4 draws air from the outdoor air outlet 3 by reverse rotation and discharges it into the room through the indoor air outlet 2. The two-way fan 4 draws air from the indoor air outlet 2 by forward rotation and discharges it outdoors through the outdoor air outlet 3.
[0032] Ceramic heat exchanger 5: The ceramic heat exchanger 5 is installed on the indoor air outlet 2. The ceramic heat exchanger 5 is axially provided with a plurality of heat exchange holes. When the bidirectional fan 4 is working, it pushes the air through the heat exchange holes for heat exchange.
[0033] In one embodiment, the bidirectional fan 4 includes a drive motor 41, a rotating shaft extending from the front and rear ends of the drive motor 41, and a front fan blade 42 and a rear fan blade 43 are respectively installed at the front and rear ends of the drive motor 41 through the rotating shaft.
[0034] In one embodiment, the front blades 42 and the rear blades 43 are mixed flow blades.
[0035] In one embodiment, the ceramic heat exchanger 5 includes a heat exchange inner liner 51 and a heat exchange outer shell 52 mounted thereon. The heat exchange outer shell 52 is connected to the ventilation duct 1 . A ceramic heat exchange core 53 is fixedly installed in the heat exchange inner liner 51 .
[0036] In one embodiment, both ends of the ceramic heat exchange core 53 are covered with filters 6 .
[0037] In one embodiment, the filter 6 is fixed to the inner hole of the heat exchange liner 51 via a mounting bracket 61 .
[0038] 2. In one embodiment, the indoor air outlet 2 and the outdoor air outlet 3 are covered with an air inlet net 7, and the air inlet net 7 includes a plurality of concentric support rings 71, and adjacent two support rings 71 are connected by a plurality of radially distributed ribs 72, and the sides of the ribs 72 are connected. In one embodiment, a card slot 73 is provided on the outer circumference of the air inlet net 7, and correspondingly, a buckle 74 that cooperates with the card slot 73 is provided on the indoor air outlet 2 or the outdoor air outlet 3. The air inlet net 7 is rotated so that the card slot 73 and the buckle 74 overlap or separate, thereby realizing the installation and disassembly of the air inlet net 7.
[0039] When in use, the fan moves in the following manner to achieve the control of the above ventilation system, which includes:
[0040] S1: The bidirectional fan 4 rotates forward for X minutes to draw indoor air out of the room. The air passes through the ceramic heat exchanger to complete energy storage. The fan stops for Y seconds to stop the fan blades.
[0041] S2: The two-way fan 4 reverses for X minutes to draw outdoor air into the room. The air passes through the ceramic heat exchanger for heat exchange. The fan stops for Y seconds to stop the fan blades.
[0042] S3: Steps S1 and S2 are operated alternately and cyclically until the user controls the machine to stop.
[0043] In one embodiment, the value of X is 1-3 minutes, and the value of Y is 5-30 seconds.
[0044] Working Principle: The ventilation system with heat exchange function provided by this utility model realizes efficient air exchange and heat recovery through the synergistic effect of a two-way fan, a ceramic heat exchanger, a filtration system and an intelligent control system, thereby achieving the dual effects of energy saving and improving air quality. The specific working principle is as follows:
[0045] The bidirectional fan design of this system adopts the method of alternating forward and reverse operation, combined with the double-blade design, to ensure that air can be efficiently exhausted from the room and fresh air can be brought in from the outside. The forward and reverse rotation of the fan correspond to different working modes:
[0046] Air Exhaust Mode (Forward): When the bidirectional fan rotates forward, indoor air enters ventilation duct 1 through indoor air vent 2 and flows through ceramic heat exchanger 5. During this process, the indoor air transfers its heat or cold to the ceramic heat exchanger, gradually storing energy. Due to the ceramic heat exchanger's large specific heat capacity, it can store heat or cold very efficiently. This energy storage process not only does not affect indoor ventilation needs, but also effectively stores the energy in the indoor air, avoiding energy waste.
[0047] After the exhaust is completed, the fan reverses and starts, and the system enters the air introduction mode. At this time, fresh air from outside enters the ventilation duct through the outdoor air outlet 3, passes through the two-way fan, dust filter cotton and ceramic heat exchanger in turn, and finally enters the room through the indoor air outlet 2. When the outside air flows through the ceramic heat exchanger, the previously stored heat or cold air will be transferred to the fresh air through the heat exchanger, so that the temperature of the air entering the room is close to the indoor temperature. For example, when the outdoor temperature is -15°C and the indoor temperature is 25°C, the temperature of the air introduced into the room through this system can be raised to 15°C, and the energy saving efficiency can reach 75%. This design significantly reduces the energy waste during the ventilation process and maintains indoor comfort.
[0048] To ensure high wind pressure and volume, the system utilizes a bidirectional, dual-blade mixed flow fan design. The mixed flow fan combines the high air volume of an axial fan with the high air pressure of a centrifugal fan, enabling rapid ventilation. The fan blade design is optimized using the Bernoulli principle, with the cross-section of the fan blades designed to resemble an airfoil, maximizing lift and air volume. Furthermore, the dual-blade boost design further increases the fan's wind pressure and speed, significantly improving the system's ventilation efficiency.
[0049] Among them, it should be noted that: the ceramic heat exchanger, as one of the core components of the system, adopts ceramic materials with high specific heat capacity. This material not only has a strong energy storage capacity, but also has the advantages of high temperature resistance and high mechanical strength. The internal structure of the ceramic heat exchanger is a honeycomb ventilation hole design. This design not only reduces the wind resistance when the air flows through, but also enhances the heat exchange efficiency between the air and the heat exchanger. In the air exhaust mode, the indoor air stores heat or cold air in the ceramic material when passing through the heat exchanger; in the air introduction mode, the energy stored in the ceramic material will be transferred to the air introduced from the outside through the heat exchanger, so that the air is preheated or precooled before entering the room. This design greatly reduces energy loss and significantly improves the energy-saving effect of the system.
[0050] Furthermore: To ensure the cleanliness of the air entering the room, the system has dust filters installed before and after the ceramic heat exchanger. These filters can be made of filter mesh or filter cotton. The filter cotton can effectively filter out pollutants such as dust, pollen, and odors in the air, ensuring indoor air quality. For scenes with higher environmental requirements, users can also choose a more efficient HEPA filter to enhance the air purification effect. The filtration system not only ensures the freshness of the air entering the room, but also protects the ceramic heat exchanger from being clogged by pollutants, extending the service life of the heat exchanger and maintaining the long-term efficient operation of the system.
[0051] To overcome the wind resistance and pressure loss of the ceramic heat exchanger and filter cotton, an air inlet mesh 7 is installed on the indoor air outlet 2 and the outdoor air outlet 3 in this case. The air inlet mesh 7 includes several concentric support rings 71. Adjacent support rings 71 are connected by several radially distributed ribs 72. The side walls of the ribs 72 are tilted inward. The tilted ribs act as side air intake. Compared with the traditional planar air intake method, the side air intake design increases the air inlet and outlet area without changing the ventilation diameter, significantly reducing the air volume and pressure loss, thereby ensuring that the ventilation efficiency of the system is not affected.
[0052] The ceramic heat exchanger and filter cotton require regular cleaning or replacement. To facilitate user maintenance of the system, this utility model utilizes a removable ceramic heat exchanger. The removable structure of the ceramic heat exchanger allows for easy access to the system's consumable components. The ceramic heat exchanger is secured with a rotating retaining clip and screws, using a slot and clip on the air inlet mesh. Users only need to rotate the air inlet mesh to remove or install it, without having to disassemble the entire housing. This design not only simplifies maintenance but also improves the safety and convenience of replacing consumables.
[0053] In summary, in this case, through the efficient heat exchange function of the ceramic heat exchanger, this system can recover 75% of the indoor energy during the ventilation process, avoiding the energy waste caused by air discharge in traditional ventilation equipment.
[0054] In addition, through the cooperation of the two-way fan and the ceramic heat exchanger, the system can ensure that the temperature of the introduced air is close to the indoor temperature, significantly reducing the impact of temperature differences on indoor comfort.
[0055] In addition: Dust-proof filter cotton effectively filters dust, pollen and other pollutants in the external air. Users can also choose a more powerful HEPA filter according to their needs to ensure the cleanliness of the air entering the room.
[0056] In general, the utility model not only achieves efficient air exchange through a number of innovative designs, but also greatly reduces energy loss and improves air quality. It has significant energy-saving and environmental protection effects and broad application prospects, so it can be widely promoted and used.
[0057] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements shall fall within the scope of the present invention as claimed.
Claims
1. A ventilation system with heat exchange function, characterized in that: It includes a ventilation duct (1); the ventilation duct (1) is connected to an indoor air outlet (2) installed indoors, and is connected to an outdoor air outlet (3) outdoors; Bidirectional fan (4): The bidirectional fan (4) is connected in series in the ventilation duct (1). The bidirectional fan (4) inhales air from the outdoor air outlet (3) by reverse rotation and discharges it into the room through the indoor air outlet (2); the bidirectional fan (4) inhales air from the indoor air outlet (2) by forward rotation and discharges it outdoors through the outdoor air outlet (3); Ceramic heat exchanger (5): The ceramic heat exchanger (5) is installed on the indoor air outlet (2). The ceramic heat exchanger (5) is axially provided with a plurality of heat exchange holes. When the bidirectional fan (4) is in operation, the air is pushed through the heat exchange holes for heat exchange.
2. A ventilation system with heat exchange function according to claim 1, characterized in that: The bidirectional fan (4) includes a driving motor (41), a rotating shaft extending from the front and rear ends of the driving motor (41), and a front fan blade (42) and a rear fan blade (43) are respectively installed at the front and rear ends of the driving motor (41) through the rotating shaft.
3. A ventilation system with heat exchange function according to claim 2, characterized in that: The The front fan blade (42) and the rear fan blade (43) are mixed flow fan blades.
4. The ventilation system with heat exchange function according to claim 1, characterized in that: The ceramic heat exchanger (5) comprises a heat exchange inner liner (51) and a heat exchange outer shell (52) mounted thereon. The heat exchange outer shell (52) is connected to the ventilation duct (1). A ceramic heat exchange core (53) is fixedly installed in the heat exchange inner liner (51).
5. A ventilation system with heat exchange function according to claim 4, characterized in that: Both ends of the ceramic heat exchange core (53) are covered with filters (6).
6. A ventilation system with heat exchange function according to claim 5, characterized in that: The filter (6) is fixed to the inner hole of the heat exchange liner (51) via a mounting bracket (61).
7. The ventilation system with heat exchange function according to claim 1, characterized in that: The indoor air outlet (2) and the outdoor air outlet (3) are covered with an air inlet net (7), and the air inlet net (7) includes a plurality of concentric support rings (71), and adjacent support rings (71) are connected by a plurality of radially distributed ribs (72), and the side walls of the ribs (72) are inclined inwardly.
8. The ventilation system with heat exchange function according to claim 7, characterized in that: A card slot (73) is provided on the outer circumference of the air inlet net (7), and correspondingly, a buckle (74) that cooperates with the card slot (73) is provided on the indoor air outlet (2) or the outdoor air outlet (3). The air inlet net (7) is rotated so that the card slot (73) and the buckle (74) overlap or separate, thereby realizing the installation and removal of the air inlet net (7).