Ventilation system with heat exchange function and control mode thereof

Abstract

The invention discloses a ventilation system with a heat exchange function and a control method thereof. The ventilation system comprises a ventilation pipeline and a two-way fan, wherein the two-way fan is connected in the ventilation pipeline in series; the ceramic heat exchanger is installed on the indoor air opening, a plurality of heat exchange holes are formed in the ceramic heat exchanger in the axial direction, and when the two-way fan works, air is pushed to penetrate through the heat exchange holes for heat exchange. The air exchange system has the beneficial effects that the ceramic heat exchanger is introduced into the air exchange system, and the heat exchange function of air in the discharging and introducing processes is achieved. The porous structure design of the ceramic heat exchanger can effectively store and transfer heat in the air circulation process. In summer, indoor cold air is not greatly lost along with ventilation, but is recovered and transferred to the entering fresh air through the heat exchanger; similarly, in winter, indoor heat is reserved through the heat exchanger, the influence of the indoor and outdoor temperature difference on the indoor temperature is reduced, energy consumption of an air conditioner or heating equipment is remarkably reduced, and the overall energy-saving effect is improved.

Description

Technical Field

[0001] The invention relates to ventilation equipment, in particular to a ventilation system with heat exchange function and a control method thereof. Background Art

[0002] In daily life, indoor air quality has a vital impact on people's health and comfort. In order to maintain good air quality, ventilation equipment, such as ventilation fans, are usually used to expel indoor dirty air and inhale fresh air. However, with the increasing requirements for environmental comfort in modern life, especially when using air conditioning or heating equipment, the use of ventilation equipment has exposed some obvious shortcomings and deficiencies.

[0003] Especially in summer, when people use air conditioners to cool down the room, they tend to keep doors and windows closed to maintain a cool indoor environment. However, keeping doors and windows closed for a long time will cause the oxygen content of indoor air to gradually decrease, and pollutants such as carbon dioxide to accumulate, making the air quality worse and affecting health. Similarly, in the cold winter, heating equipment such as air conditioners or heaters are widely used. In order to keep the room warm, people also tend to close doors and windows, resulting in indoor air stagnation, which in turn causes a series of air quality problems, such as dry air and increased carbon dioxide content.

[0004] Although ventilation equipment can effectively improve indoor air quality, there is a significant disadvantage when using these devices: a large amount of energy loss. Traditional ventilation equipment does not have an effective heat exchange function, and when exhausting the dirty air in the room, it will take away a large amount of heat energy or cold air. This means that in summer, the cold air cooled by air conditioning in the room will be exhausted outdoors with the air; in winter, the heat generated by heating equipment in the room will also dissipate with the exhausted air. In this case, although the indoor air circulation is achieved, a large amount of energy is wasted, which not only increases the operating load of air conditioning and heating equipment, causing a significant increase in energy consumption, but also has an adverse impact on the environment.

[0005] Therefore, how to achieve efficient ventilation while reducing energy loss has become a technical problem that needs to be solved in the existing technology. Especially in the current context of energy conservation and environmental protection, it is particularly important to develop a ventilation device with a heat exchange function that can recover indoor heat or cold air during the exhaust process and reuse it in the input fresh air to reduce energy waste. Therefore, it is necessary to make further improvements to it. Summary of the invention

[0006] The purpose of the present invention 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, a ventilation system with heat exchange function and its control method that can both maintain indoor air quality and significantly reduce energy loss.

[0007] The object of the present invention is achieved by the following method: a ventilation system with heat exchange function, comprising a ventilation duct; the ventilation duct is connected to an indoor air outlet installed indoors, and is connected to an outdoor air outlet outdoors; Two-way fan: The two-way fan is connected in series in the ventilation duct. The two-way fan inhales air from the outdoor air outlet by reverse rotation and discharges it into the room through the indoor air outlet; the two-way fan inhales air from the indoor air outlet by forward rotation and discharges it outdoors through the outdoor air outlet; Ceramic heat exchanger: The ceramic heat exchanger is installed on the indoor air outlet. The ceramic heat exchanger is axially provided with a number of heat exchange holes. When the bidirectional fan is working, it pushes the air through the heat exchange holes for heat exchange.

[0008] Furthermore: the bidirectional fan includes a driving motor, a rotating shaft extends from the front and rear ends of the driving motor, and a front fan blade and a rear fan blade are respectively installed at the front and rear ends of the driving motor through the rotating shaft.

[0009] Furthermore: the front blades and the rear blades are mixed flow blades.

[0010] Furthermore, the ceramic heat exchanger comprises a heat exchange inner shell and a heat exchange outer shell mounted outside the heat exchange inner shell, 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.

[0011] Furthermore: both ends of the ceramic heat exchange core are covered with filters.

[0012] Furthermore: the filter is fixed on the inner hole of the heat exchange liner through a mounting bracket.

[0013] 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 two adjacent support rings are connected by a plurality of radially distributed ribs, and the side walls of the ribs are inclined inwardly.

[0014] Furthermore: a card slot is arranged on the outer circumference of the air inlet net, and correspondingly, a buckle cooperating with the card slot is arranged 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.

[0015] A control method for a ventilation system with a heat exchange function, which realizes the control of the ventilation system, comprises: S1: The two-way fan 4 rotates forward for X minutes to pump indoor air out to the outside. The air passes through the ceramic heat exchanger to complete energy storage. The fan stops for Y seconds to stop the fan blades.

[0016] 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.

[0017] S3: Steps S1 and S2 are operated alternately and cyclically until the user controls the machine to stop.

[0018] Furthermore, the value of X is 1-3 minutes, and the value of Y is 5-30 seconds.

[0019] The beneficial effects of the present invention are: 1. Simple structure, low production cost and improved market competitiveness.

[0020] 2. The present invention realizes the heat exchange function of air during the discharge and introduction process by introducing a ceramic heat exchanger into the ventilation system. The porous structure design of the ceramic heat exchanger can effectively store and transfer heat during the air circulation process. In summer, indoor cold air will not be lost in large quantities with ventilation, but will be recovered through the heat exchanger and transferred to the incoming fresh air; similarly, in winter, indoor heat is retained through the heat exchanger, reducing the impact of the indoor and outdoor temperature difference on the indoor temperature, significantly reducing the energy consumption of air conditioning or heating equipment, and improving the overall energy saving effect.

[0021] 3. The ventilation system can effectively maintain the relative stability of the indoor temperature during ventilation, and will not cause drastic fluctuations in the room temperature due to frequent ventilation. When the traditional ventilation equipment is in operation, it often causes the room temperature to drop or rise rapidly, affecting the comfort experience of the residents. However, the present invention uses the heat exchange function to adjust the temperature of the indoor exhaust air and the introduced fresh air, so that the fresh air is close to the room temperature before entering the room, thereby maintaining the indoor temperature balance and improving the living comfort.

[0022] 4. The present invention adopts a two-way fan, which realizes the two-way flow of air through the forward and reverse control mode. When rotating forward, the fan can discharge the dirty air in the room to the outside; when rotating reversely, it inhales fresh outdoor air and performs heat exchange through the heat exchanger. This design not only simplifies the structure, but also improves the ventilation efficiency of the system. In addition, the forward and reverse rotation time and interval time of the two-way fan can be flexibly adjusted according to needs, further improving the intelligence level of the system.

[0023] 5. The ventilation system of the present invention has high practicality in structural design. For example, the design of the air inlet net adopts the installation method of buckle and slot, and the user can disassemble and install the air inlet net by simply rotating it, which is convenient for cleaning or replacing the air inlet net. The ceramic heat exchange and filter settings also have modular design, which is easy to maintain and replace, ensuring the long-term and efficient operation of the system while reducing maintenance costs.

[0024] 6. The system not only realizes energy recovery during ventilation, but also sets filters at both ends of the ceramic heat exchanger, which can effectively filter dust, particulate matter and other impurities in the external air to prevent them from entering the room, thereby greatly improving the cleanliness of the air entering the room. This function makes the present invention not only outstanding in energy saving, but also takes into account the improvement of air quality, providing users with a healthier indoor environment.

[0025] 7. The present invention provides a specific control method, which can achieve efficient ventilation and heat exchange within the time set by the user by alternating the two steps S1 and S2. The control method flexibly adjusts the operation time and interval time of the fan according to the indoor and outdoor air conditions, user needs, etc., so that the energy efficiency of the system can be optimized. The user can adjust the ventilation strategy according to different environmental needs, thereby improving the intelligence of the system and user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall assembly of the structure of the present invention.

[0027] Figure 2 It is a cross-sectional view of the general assembly structure of the present invention.

[0028] Figure 3 In the present invention Figure 2 A-section structure enlarged view.

[0029] Figure 4 In the present invention Figure 2 Enlarged view of the structure of part B.

[0030] Figure 5 In the present invention Figure 2 Enlarged view of the C structure.

[0031] Figure 6 Exploded view of the structure of the ceramic heat exchanger in the present invention.

[0032] Figure 7 Schematic diagram of the air inlet network structure in the present invention. DETAILED DESCRIPTION

[0033] The present invention is further described in detail below with reference to the accompanying drawings. A ventilation system with heat exchange function, comprising 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; Two-way fan 4: The two-way fan 4 is connected in series in the ventilation duct 1. The two-way 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 two-way 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 working, it pushes the air through the heat exchange holes for heat exchange.

[0034] In one embodiment, the bidirectional fan 4 includes a driving motor 41, a rotating shaft extends 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.

[0035] In one embodiment, the front blades 42 and the rear blades 43 are mixed flow blades.

[0036] In one embodiment, the ceramic heat exchanger 5 includes a heat exchange inner shell 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 shell 51 .

[0037] In one embodiment, filters 6 are installed on both ends of the ceramic heat exchange core 53 .

[0038] In one embodiment, the filter 6 is fixed to the inner hole of the heat exchange liner 51 through a mounting bracket 61 .

[0039] 2. In one of the embodiments, 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 two adjacent support rings 71 are connected by a plurality of radially distributed ribs 72, and the sides of the ribs 72 are provided with a card slot 73 on the outer circumference of the air inlet net 7. Correspondingly, the indoor air outlet 2 or the outdoor air outlet 3 is provided with a buckle 74 that cooperates with the card slot 73. 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.

[0040] A control method for a ventilation system with a heat exchange function, which realizes the control of the ventilation system, comprises: S1: The two-way fan 4 rotates forward for X minutes to pump indoor air out to the outside. 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 the present invention 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: The two-way 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 introduced from the outside. The forward and reverse rotation of the fan correspond to different working modes: Air exhaust mode forward rotation: When the two-way fan rotates forward, the indoor air enters the ventilation duct 1 through the indoor air outlet 2 and flows through the ceramic heat exchanger 5. In this process, the indoor air transfers its heat or cold air to the ceramic heat exchanger, causing the ceramic heat exchanger to gradually store energy. Since the ceramic heat exchanger has a large specific heat capacity, it can store heat or cold air more effectively. This energy storage process not only does not affect the indoor ventilation demand, but also can effectively store the energy in the indoor air, avoiding energy waste.

[0045] After the exhaust is completed, the fan starts in reverse and the system enters the air introduction mode. At this time, fresh air from the 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 increased to 15°C, and the energy saving efficiency can reach 75%. This design significantly reduces the energy waste during ventilation and maintains indoor comfort.

[0046] In order to ensure that the system has a large wind pressure and air volume, the system adopts a bidirectional double-blade mixed flow fan design. The mixed flow fan blades combine the large air volume of the axial flow fan and the high wind pressure of the centrifugal fan, and can complete the ventilation task in a short time. The fan blade design is optimized by the Bernoulli principle, and the cross-section of the fan blade is designed as an airfoil to maximize the lift and air volume. At the same time, the double-blade booster design further increases the wind pressure and wind speed of the fan, greatly improving the ventilation efficiency of the system.

[0047] Among them, it should be noted that the ceramic heat exchanger, as one of the core components of the system, uses 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, which 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.

[0048] Furthermore: In order to ensure that the air entering the room is clean, the system is equipped with dust filters before and after the ceramic heat exchanger, which can be made of filter nets or filter cotton. The filter cotton can effectively filter pollutants such as dust, pollen, and odor in the air to ensure 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 that the air entering the room is fresh, but also protects the ceramic heat exchanger from being blocked by pollutants, extends the service life of the heat exchanger, and maintains the long-term efficient operation of the system.

[0049] Among them, in order to overcome the wind resistance and pressure loss of the ceramic heat exchanger and the filter cotton, in this case, 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 the adjacent two support rings 71 are connected by a plurality of radially distributed ribs 72, and the side walls of the ribs 72 are inclined inward. The inclined ribs play a role in 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 reduces the air volume and pressure loss, thereby ensuring that the ventilation efficiency of the system is not affected.

[0050] Among them, the ceramic heat exchanger and filter cotton need to be cleaned or replaced regularly. In order to facilitate users to maintain the system, the present invention adopts a detachable design of the ceramic heat exchanger. The consumable parts in the system are convenient for users to operate through the detachable structure of the ceramic heat exchanger. The ceramic heat exchanger realizes the method of rotating the fixing buckle and screw fixing through the card slot and the buckle on the air inlet net. The user only needs to rotate the air inlet net to complete the disassembly or installation without disassembling the entire shell. This design not only simplifies the maintenance process, but also improves the safety and convenience of replacing consumables.

[0051] In summary, in this case, through the efficient heat exchange function of the ceramic heat exchanger, the system can recover 75% of the indoor energy during the ventilation process, avoiding the energy waste caused by air discharge in traditional ventilation equipment.

[0052] 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.

[0053] In addition: Dust-proof filter cotton effectively filters dust, pollen and other pollutants in the external air. Users can also choose a stronger HEPA filter according to their needs to ensure the cleanliness of the air entering the room.

[0054] In general, the present invention not only achieves efficient air ventilation 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.

[0055] 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 by the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A ventilation system with heat exchange function, characterized in that: It comprises 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; Two-way fan (4): the two-way fan (4) is connected in series in the ventilation duct (1). The two-way fan (4) inhales air from the outdoor air outlet (3) by reverse rotation and discharges air into the room through the indoor air outlet (2); the two-way fan (4) inhales air from the indoor air outlet (2) by forward rotation and discharges air into the room 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, it pushes air 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) comprises 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 mounted on the front and rear ends of the driving motor (41) via the rotating shaft.

3. A ventilation system with heat exchange function according to claim 2, characterized in that: The The front blades (42) and the rear blades (43) are mixed flow blades.

4. A ventilation system with heat exchange function according to claim 1, characterized in that: The ceramic heat exchanger (5) comprises a heat exchange inner shell (51) and a heat exchange outer shell (52) mounted outside the heat exchange inner shell (51), the heat exchange outer shell (52) being connected to the ventilation duct (1), and a ceramic heat exchange core (53) being fixedly installed in the heat exchange inner shell (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 inner tank (51) via a mounting bracket (61).

7. A 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) comprises a plurality of concentric support rings (71), and two adjacent support rings (71) are connected by a plurality of radially distributed ribs (72), and the side walls of the ribs (72) are arranged to be inclined inwards.

8. A ventilation system with heat exchange function according to claim 7, characterized in that: A clamping groove (73) is provided on the outer circumference of the air inlet net (7); correspondingly, a buckle (74) that cooperates with the clamping groove (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 clamping groove (73) and the buckle (74) overlap or separate, thereby achieving installation and removal of the air inlet net (7).

9. A control method for a ventilation system with a heat exchange function, which realizes the control of any ventilation system of claims 1 to 8, characterized in that: It includes: S1: The bidirectional fan (4) rotates forward for X minutes to pump indoor air out to the outside. The air passes through the ceramic heat exchanger to complete energy storage. The fan stops for Y seconds to stop the fan blades. 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. S3: Steps S1 and S2 are operated alternately and cyclically until the user controls the machine to stop.

10. The control method of a ventilation system with heat exchange function according to claim 9, characterized in that: The value of X is 1-3 minutes, and the value of Y is 5-30 seconds.

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