Indoor ventilation heat exchange system

Abstract

The utility model discloses an indoor ventilation heat exchange system. The indoor ventilation heat exchange system includes air conditioner body and air supply component. Among them, air conditioner body includes indoor unit and outdoor unit, and indoor unit is used for installing in the room, and outdoor unit is used for installing in the room outside, air supply component includes air supply channel, and air supply channel is used for at least communicating the inside and the outside of room, and air supply channel is used for at least conveying the air in the room to the place of outdoor unit to defrost or cool outdoor unit. The indoor heat exchange heat exchange system provided in the application is used for solving the problem of increasing air conditioning operation load and increasing energy consumption caused by indoor energy loss when the indoor ventilation is carried out in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of heat exchange device technology, and more specifically, to an indoor ventilation heat exchange system. Background Technology

[0002] In existing technologies, when users use air conditioning in enclosed indoor spaces, they need to open windows or turn on ventilation devices periodically to improve their indoor experience. However, opening windows or turning on ventilation devices causes indoor cooling and heating energy to be lost outdoors, leading to increased air conditioning load and energy consumption. Utility Model Content

[0003] The main objective of this application is to provide an indoor ventilation heat exchange system to solve the problem in the prior art where indoor energy loss during indoor ventilation leads to increased air conditioning load and energy consumption.

[0004] According to one aspect of the present invention, an indoor ventilation heat exchange system is provided, comprising:

[0005] An air conditioner body, comprising an indoor unit and an outdoor unit, wherein the indoor unit is for installation inside a room and the outdoor unit is for installation outside the room;

[0006] An air supply assembly, comprising an air supply duct, the air supply duct being at least used to connect the interior and exterior of the room, and the air supply duct being at least used to deliver air from the room to the outdoor unit for defrosting or cooling the outdoor unit.

[0007] Furthermore, the air supply channel includes an air outlet, and the outdoor unit includes heat dissipation fins, which are disposed near the air outlet.

[0008] Furthermore, the air supply assembly also includes a fan, which is disposed inside or at the end of the air supply channel.

[0009] Furthermore, the indoor ventilation and heat exchange system also includes an air inlet channel for connecting the interior and exterior of the room. The air inlet channel includes an air outlet, and the air supply channel includes an air inlet. The air outlet and the air inlet are located on opposite side walls of the room. Along the height direction of the room, the height of the air inlet is greater than the height of the air outlet.

[0010] Furthermore, the indoor ventilation heat exchange system also includes a heat exchange device and an air inlet pipe. The air inlet pipe delivers air from the environment to the outdoor unit, and the two ends of the heat exchange device are respectively located in the air supply channel and the air inlet pipe.

[0011] Furthermore, the indoor ventilation heat exchange system also includes a buffer device, wherein:

[0012] The buffer device is disposed between the air supply duct and the outdoor unit; and / or, the buffer device is disposed between the air inlet pipe and the outdoor unit.

[0013] Furthermore, the buffer device includes a buffer chamber, an air inlet, and an air outlet. The air inlet is connected to the air outlet of the air supply channel, and the air outlet delivers the air in the air supply channel to the outdoor unit.

[0014] Furthermore, a baffle plate is provided inside the buffer cavity, the baffle plate is located close to the air inlet end, and there is a flow gap between the baffle plate and the inner wall surface of the buffer cavity.

[0015] Furthermore, a flow equalization plate is also provided inside the buffer cavity. The flow equalization plate is located below the blocking plate and is at a predetermined distance from the blocking plate. The flow equalization plate is provided with uniformly distributed flow holes.

[0016] Furthermore, the air outlet is provided with a guide vane, which is inclined toward the outdoor unit side.

[0017] In this invention, the indoor unit is installed inside the room, and the outdoor unit is installed outside the room, with an air supply duct connecting the interior and exterior of the room. When the user needs to ventilate the room, cool or warm air from inside can be delivered to the outdoor unit through the air supply duct for cooling or defrosting, and can also reduce the occurrence of frost on the outdoor unit to a certain extent. This design not only collects the energy lost during indoor ventilation and exchanges it with the outdoor unit for heat, thereby reducing the air conditioning load and saving energy, but also extends the service life of the outdoor unit, reducing maintenance costs and the frequency of equipment replacement. Attached Figure Description

[0018] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0019] Figure 1 This is a schematic diagram of the structure of the first indoor ventilation heat exchange system disclosed in the embodiments of this application;

[0020] Figure 2 This is a schematic diagram of the structure of the second type of indoor ventilation heat exchange system disclosed in the embodiments of this application.

[0021] The above figures include the following reference numerals:

[0022] 10. Outdoor unit; 11. Heat dissipation fins; 20. Air supply assembly; 21. Air supply duct; 211. Air inlet; 212. Air outlet; 22. Fan; 30. Room; 40. Air inlet duct; 41. Air outlet; 42. Air inlet; 50. Heat exchanger; 60. Air inlet pipe; 70. Buffer device; 71. Buffer chamber; 711. Flow gap; 72. Air inlet end; 73. Air outlet end; 731. Guide vane; 74. Baffle plate; 75. Flow equalization plate; 751. Flow hole; 80. Filter device; 90. Flow guide device; 91. Air inlet hood; 92. Air return hood. Detailed Implementation

[0023] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0024] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0025] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0026] As mentioned in the background section, in existing technologies, users using air conditioning in enclosed indoor spaces need to open windows or turn on ventilation devices periodically to improve their indoor experience. However, opening windows or turning on ventilation devices causes indoor cooling and heating energy to be lost outdoors, leading to increased air conditioning load and energy consumption. Therefore, this application proposes a novel indoor ventilation heat exchange system that solves the problem of increased air conditioning load and energy consumption caused by indoor energy loss during ventilation in existing technologies. The indoor ventilation heat exchange system of this application will be described in detail below with reference to the accompanying drawings.

[0027] See Figure 1 and Figure 2 As shown, according to an embodiment of this application, an indoor ventilation heat exchange system is provided, which includes an air conditioning unit and an air supply assembly 20.

[0028] Specifically, the air conditioner body in this embodiment includes an indoor unit (not shown in the figure) and an outdoor unit 10. The indoor unit is used to be installed inside the room 30, and the outdoor unit 10 is used to be installed outside the room 30. The air supply assembly 20 includes an air supply duct 21, which is used to connect the inside and outside of the room 30 at least, and the air supply duct 21 is used to deliver the air inside the room 30 to the outdoor unit 10 for defrosting or cooling the outdoor unit 10.

[0029] In this application, the indoor unit is installed inside room 30 to heat or cool the room. The outdoor unit 10 is installed outside room 30. By providing an air supply duct 21 connecting the inside and outside of room 30, air from room 30 can be delivered to the outdoor unit 10 for defrosting or cooling. Specifically, in winter, when the air conditioner is in heating mode, frost easily forms on the surface of the outdoor unit 10, affecting heat exchange efficiency. When ventilation is needed in room 30, warmer indoor air is delivered to the outdoor unit 10 through the air supply duct 21, which increases the surface temperature of the outdoor unit 10. If frost forms on the surface of the outdoor unit 10, it can help melt the frost. Compared to traditional methods such as reverse operation defrosting, this avoids the indoor unit from switching from heating to cooling, reduces indoor temperature fluctuations, and eliminates the need for indoor equipment to counteract the cooling released by the indoor unit during defrosting, thus improving defrosting efficiency and reducing energy consumption. Meanwhile, in winter, warm indoor air is delivered to outdoor unit 10. If frost has not yet formed on outdoor unit 10, this can, to some extent, inhibit frost formation. In summer, when the air conditioner runs for extended periods, components such as the compressor inside outdoor unit 10 generate a large amount of heat. If this heat is not dissipated in time, it will affect the equipment's performance and lifespan. When indoor ventilation is needed, cool indoor air is delivered to outdoor unit 10 through air duct 21, which helps lower the temperature of outdoor unit 10, thus providing a cooling effect and keeping the components inside outdoor unit 10 within a suitable operating temperature range, ensuring stable operation of the air conditioning system.

[0030] In other words, when users need to ventilate the room, the cool or warm air from inside can be delivered to the outdoor unit 10 through the air supply duct 21 to cool or defrost the outdoor unit 10, and to a certain extent, reduce the occurrence of frost on the outdoor unit 10. This setting not only collects the energy lost during indoor ventilation and exchanges it with the outdoor unit 10 for heat, thereby reducing the air conditioning operating load and saving energy, but also extends the service life of the outdoor unit 10, reducing maintenance costs and the frequency of equipment replacement.

[0031] like Figure 1 and Figure 2As shown, the air supply duct 21 includes an air outlet 212, and the outdoor unit 10 includes heat dissipation fins 11, which are positioned close to the air outlet 212. In this application, the heat dissipation fins 11 are the core component for heat exchange in the outdoor unit 10. Both defrosting and cooling rely on the heat exchange between the heat dissipation fins 11 and the air. Positioning the air outlet 212 of the air supply duct 21 close to the heat dissipation fins 11 allows the air supplied by the air supply duct 21 (such as warm indoor air or cold air at a lower temperature than the outdoor air) to act more directly and concentratedly on the surface of the heat dissipation fins 11, reducing heat loss or diffusion of the air before it reaches the heat dissipation fins 11. This ensures that more energy (heat or cold) participates in the heat exchange process of the heat dissipation fins 11 and extends the service life of the equipment. For example, during defrosting, warm air can quickly come into contact with the frosted heat dissipation fins 11, accelerating the melting of the frost layer; during cooling, the air can directly carry away the heat from the surface of the heat dissipation fins 11, improving heat dissipation efficiency. Furthermore, close-range airflow shortens the time it takes for air to reach the heat dissipation fins 11 from the air outlet 212, allowing defrosting or cooling to take effect more quickly. The close proximity of the air outlet 212 and the heat dissipation fins 11 also reduces the redundant length of the air supply duct 21, making the overall structure of the air supply assembly 20 and the outdoor unit 10 more compact and saving installation space. Simultaneously, the compact layout reduces the design complexity of the air supply duct 21, minimizes wind resistance caused by pipe bends, and further improves airflow efficiency.

[0032] See you again Figure 1 and Figure 2 As shown, the air supply assembly 20 also includes a fan 22, which is disposed inside or at the end of the air supply duct 21. For example, the fan 22 can be disposed at any position inside the air supply duct 21 extending along the length direction of the air supply duct 21; it can also be disposed at the end of the air supply duct 21, which can enhance airflow dynamics and optimize air supply efficiency, thereby further improving the performance of the entire indoor ventilation and heat exchange system.

[0033] Specifically, in this application, the fan 22 directly acts on the airflow inside the air supply duct 21, actively driving the airflow within the duct 21 to effectively overcome wind resistance during the air supply process (such as resistance caused by duct bends, cross-sectional changes, etc.). This arrangement ensures that the air supplied from the indoor unit to the outdoor unit 10 has sufficient airflow and air pressure, especially when the air supply duct 21 is long or has a complex structure, avoiding airflow attenuation due to insufficient natural convection, thereby ensuring a stable amount of air reaching the heat dissipation fins 11, thus reliably achieving defrosting or cooling functions. Furthermore, placing the fan 22 inside or at the end of the air supply duct 21 guides the airflow to flow directionally along the duct 21, reducing turbulence, backflow, or diffusion within the duct 21. Moreover, the fan 22 is integrated inside or at the end of the air supply duct 21, eliminating the need for an additional independent drive device or complex power transmission structure, making the overall air supply assembly 20 more compact. This not only saves installation space (especially suitable for scenarios where the outdoor unit 10 has limited installation space), but also reduces connection costs between components, facilitating production assembly and subsequent maintenance.

[0034] Furthermore, this application may also include a controller (not shown in the figure) to set the speed and operating time of the fan 22, thereby controlling the air exchange volume and frequency per unit time to ensure indoor comfort. In addition, controlling the fan 22 via the controller allows for flexible changes in airflow. For example, during defrosting, if the outdoor unit 10 has a thick layer of frost, the speed of the fan 22 can be increased to increase the airflow and accelerate the melting of the frost. When cooling the outdoor unit 10, if the ambient temperature is too high or the outdoor unit 10 is under heavy load, the airflow intensity can be increased to quickly remove heat from the heat dissipation fins 11. Conversely, under lighter operating conditions, the speed can be reduced to decrease energy consumption, achieving on-demand airflow and improving system flexibility.

[0035] like Figure 1 and Figure 2 As shown, the indoor ventilation and heat exchange system also includes an air inlet duct 40, which is used to connect the interior and exterior of the room 30. The air inlet duct 40 includes an air outlet 41, and the air supply duct 21 includes an air inlet 211. The air outlet 41 and the air inlet 211 are located on opposite side walls of the room 30. Along the height direction of the room 30, the height of the air inlet 211 is greater than the height of the air outlet 41.

[0036] Specifically, the air outlet 41 and the air inlet 211 are located on opposite side walls of room 30, allowing fresh air entering the room through the air inlet duct 40 to flow throughout the room 30, rather than circulating in localized short circuits. Air must flow through most of room 30 before being drawn in by the air supply duct 21, more effectively removing stale air, odors, and excess heat, ensuring effective air exchange in all areas of room 30, preventing localized air stagnation, and improving overall ventilation. If cold air is introduced from the air inlet duct 40, it will diffuse and sink from the lower air outlet 41, gradually mixing with the indoor hot air. The hot air will naturally rise to the upper level and be drawn in and discharged by the air inlet 211, forming a "bottom in, top out" cycle, which accelerates air mixing and replacement. If hot air is introduced from the air inlet duct 40, it will gradually rise after entering the room from the lower level, mixing with the indoor cold air. The cold air will be drawn in by the air inlet 211 at the upper level as it sinks. At the same time, natural convection can be used to enhance circulation efficiency, reduce dependence on the power of the fan 22, and reduce energy consumption.

[0037] Furthermore, by placing the air outlet 41 and the air inlet 211 on opposite side walls of the room 30, with the height of the air inlet 211 greater than that of the air outlet 41, the spatial distance between them is maximized. This ensures that the introduced air undergoes thorough mixing, heat exchange, or replacement of stale air within the room 30 before being exhausted. This allows the air delivered to the outdoor unit 10 via the air supply duct 21 to better reflect the actual indoor air conditions (such as temperature and heat), indirectly improving the efficiency of defrosting or cooling the outdoor unit 10. The staggered heights and location of the air outlet 41 and air inlet 211 on opposite sides guide airflow into a three-dimensional circulation within the room 30, preventing direct airflow onto the human body and resulting in a more uniform indoor temperature distribution, reducing localized temperature differences and improving user comfort.

[0038] Furthermore, in this application, a flow guiding device 90 is provided at the air outlet 41 of the air inlet channel 40. The flow guiding device 90 can be a flow guiding hood or other flow guiding structure. The flow guiding device 90 can optimize the airflow field of the fresh air entering the room according to its specific shape design, and reduce the airflow resistance, etc.

[0039] In other embodiments of this application, such as Figure 2As shown, the indoor ventilation heat exchange system also includes a heat exchange device 50 and an air inlet duct 60. The air inlet duct 60 delivers ambient air to the outdoor unit 10. The two ends of the heat exchange device 50 are respectively located in the air supply duct 21 and the air inlet duct 60. This configuration recovers the air energy (heat or cold) within the air supply duct 21 to pre-cool or preheat the ambient air introduced through the air inlet duct 60, thereby improving the system's energy utilization efficiency and further optimizing the operating conditions of the outdoor unit 10. Furthermore, the heat exchange device 50 is directly connected in series between the air supply duct 21 and the air inlet duct 60, requiring no additional space and allowing seamless connection with the aforementioned indoor ventilation heat exchange system. This simplifies the overall piping layout, reduces the complexity of piping connections, and lowers system energy loss.

[0040] Furthermore, in this application, an air inlet hood 91 and a fan 22 are provided at the air inlet 42 of the air inlet channel 40 and the air inlet of the air inlet pipe 60. The fan 22 provides active stabilization to ensure air intake efficiency and stability, ensuring the ventilation efficiency of the indoor or outdoor unit 10. The air inlet hood 91 not only blocks impurities and protects the internal components of the air inlet channel 40, but also optimizes the air intake airflow and reduces wind resistance and noise. In addition, the air inlet hood 91 also provides safety protection, as the low position of the air inlet 42 avoids the risk of personnel contact. This application also provides a return air hood 92 at the air inlet 211, which can improve return air efficiency, protect system safety, and optimize airflow.

[0041] In addition, this application also includes a filter device 80. Exemplarily, the filter device 80 can be a filter screen. When in the air inlet duct 40, the filter device 80 can be installed inside the air inlet duct 40 or at the air outlet 41 of the air inlet duct 40. With this configuration, the filter device 80 can purify the air entering the room, improve indoor air quality, reduce the risk of allergies and respiratory diseases, and improve the comfort of living and working environments. When in the air supply duct 21, the filter device 80 can be installed at any position within the air supply duct 21 to reduce the impact of impurities in the air supply duct 21 on the fan 22 or outdoor unit 10, thus reducing maintenance costs. When in the air inlet duct 60, the filter device 80 is located at any position within the air inlet duct 60 to filter the air introduced into the air inlet duct 60, reducing adverse effects on the subsequent outdoor unit 10.

[0042] Furthermore, in this application, the heat exchange device 50 is a heat pipe heat exchanger. A heat pipe is a vacuum metal tube internally sealed with a working fluid (such as acetone, water, etc.). Generally, a heat pipe includes three parts: an evaporation section, a condensation section, and an insulation section. The evaporation section is located on the side with a higher temperature, the condensation section is located on the side with a lower temperature, and the insulation section is used to connect the evaporation section and the condensation section and transfer steam. That is to say, in this application, the evaporation section and the condensation section of the heat exchange device 50 are respectively arranged in the air supply channel 21 and the air inlet pipe 60. In summer, the heat exchange section in the air inlet pipe 60 is the evaporation section, and the heat exchange section in the air supply channel 21 is the condensation section; in winter, the heat exchange section in the air inlet pipe 60 is the condensation section, and the heat exchange section in the air supply channel 21 is the evaporation section.

[0043] The working principle of the heat exchange device 50 is as follows: During the heat absorption process, when the evaporation section of the heat pipe comes into contact with the air at a higher temperature (such as the indoor air in the air supply duct 21), the working fluid in the pipe absorbs heat and evaporates into steam; the steam flows rapidly to the condensation section under the action of pressure difference; in the condensation section, the steam releases heat to the low temperature air (such as the outdoor air in the air inlet duct 60) and recondenses into liquid; the liquid working fluid flows back to the evaporation section through capillary structure or gravity to complete the cycle.

[0044] Specifically, in summer, when the air in the air supply duct 21 is cooled air, the low-temperature air in the air supply duct 21 exchanges heat with the high-temperature outdoor air in the air inlet duct 60, pre-cooling the outdoor air before it is sent to the outdoor unit 10. This reduces the heat load of the outdoor unit 10 during cooling and lowers the power consumption of the compressor in the outdoor unit 10, extending the service life of the equipment. Furthermore, the pre-cooled air temperature is lower than the outdoor ambient temperature, which enhances the cooling effect on the heat dissipation fins 11 and prevents problems such as poor heat dissipation of the outdoor unit 10 and compressor overload caused by high outdoor temperatures.

[0045] In winter, the warm air in the air supply duct 21 exchanges heat with the low-temperature outdoor air in the air intake duct 60, preheating the outdoor air before it is sent to the outdoor unit 10. This improves defrosting efficiency, prevents low-temperature air from directly contacting the heat dissipation fins 11 and exacerbating frost formation, and reduces ineffective heat loss from the indoor environment. Through energy recovery, the air conditioning system's dependence on additional energy is reduced, improving the overall energy efficiency ratio. Furthermore, in this application, by setting up the heat exchange device 50, the air intake state at the outdoor unit 10 is optimized, improving operational stability.

[0046] In other words, in this application, during the heat exchange process, the indoor air exhausted from the air supply duct 21 has its carrying capacity of cold or heat partially recovered, rather than being directly discharged outdoors and wasted. This reduces indoor temperature fluctuations caused by air exhaust. In summer, it prevents the rapid loss of indoor cold energy, and in winter, it reduces indoor heat loss, making the indoor temperature more stable, reducing the frequency of frequent start-stop of the air conditioner, and improving user comfort.

[0047] like Figure 1 and Figure 2 As shown, the indoor ventilation heat exchange system also includes a buffer device 70, wherein: the buffer device 70 is disposed between the air supply duct 21 and the outdoor unit 10; optionally, the buffer device 70 can also be disposed between the air inlet duct 60 and the outdoor unit 10. In this application, the buffer device 70 is disposed between the air supply duct 21 and the outdoor unit 10, and between the air inlet duct 60 and the outdoor unit 10, respectively, which can stabilize the airflow and reduce pressure fluctuations. Specifically, the airflow in the air supply duct 21 and the air inlet duct 60 may experience turbulence or pulse fluctuations due to the start and stop of the fan 22, changes in wind speed, or pipe structure (such as bends or diameter changes). The buffer device 70 can transform unstable airflow into stable airflow by expanding the local space or guiding the airflow direction, avoiding direct impact of airflow on the internal components of the outdoor unit 10 (such as heat dissipation fins 11), and improving the heat exchange efficiency with the outdoor unit 10.

[0048] Furthermore, in this application, the buffer device 70 includes a buffer chamber 71, an air inlet 72, and an air outlet 73. The air inlet 72 is connected to the air outlet 212 of the air supply channel 21, and the air outlet 73 delivers air from the air supply channel 21 to the outdoor unit 10. With this configuration, the air inlet 72 directly connects to the air outlet 212 of the air supply channel 21, and the appropriate interface size can prevent the airflow from "sudden expansion" or "sudden contraction" at the connection point, reducing eddy current losses caused by abrupt changes in the pipe cross-section. The buffer chamber 71, as a "transfer space" for airflow, can guide the airflow from the direction of the air supply channel 21 to the direction of the air outlet 73 pointing towards the outdoor unit 10 through its internal structure, making the airflow more evenly cover the heat exchange area of ​​the outdoor unit 10 and improving the utilization rate of the heat exchange area. Moreover, the enclosed space of the buffer chamber 71 allows the airflow flowing in from the air supply channel 21 to be briefly retained, reducing the flow velocity by increasing the volume, and gradually "homogenizing" the turbulent or pulsed airflow within the chamber. In addition, if the air temperature in the air supply duct 21 changes slightly due to fluctuations in the operating conditions of the heat exchange device 50 (such as a heat pipe heat exchanger), the buffer chamber 71 can mix with the internal air to make the air temperature entering the outdoor unit 10 more stable, thereby avoiding frequent adjustments to the operating parameters of the outdoor unit 10 due to instantaneous temperature fluctuations and reducing energy waste.

[0049] Furthermore, a baffle plate 74 is provided inside the buffer cavity 71. The baffle plate 74 is positioned near the air inlet end 72, and there is a flow gap 711 between the baffle plate 74 and the inner wall of the buffer cavity 71. With this configuration, the air flowing in from the air supply channel 21 (especially the airflow near the fan 22) may carry high kinetic energy, forming a direct impact. The baffle plate 74 directly blocks the straight impact of the airflow, dispersing the originally concentrated kinetic energy into potential energy that diffuses in all directions along the baffle plate 74, preventing the airflow from forming a violent vortex at the inlet of the buffer cavity 71. For example, the flow gap 711 can be an annular gap between the edge of the plate and the cavity wall or a local notch. The flow gap 711 forces the airflow to change its direction, from "direct" to "circumferential," and the airflow velocity is reduced after the split, and the flow direction is more dispersed, which can uniformly fill the internal space of the buffer cavity 71 and reduce energy loss in local high-velocity areas. After the uniform airflow enters the outdoor unit 10, it can more comprehensively cover the surface of the heat dissipation fins 11, avoiding uneven heat exchange caused by excessive local wind speed, which would affect the overall heat exchange efficiency.

[0050] Furthermore, if the air in the air supply duct 21 has a high humidity content (such as fresh air in a humid environment in summer), the airflow will be slowed down by the baffle 74, and the reduced airflow speed will prolong the residence time of the air in the buffer cavity 71, making it easier for water vapor to condense on the low-temperature cavity wall or the surface of the baffle 74 (especially when the temperature of the buffer cavity 71 is below the dew point). Through the "condensation interception" effect of the baffle 74, the amount of water vapor entering the outdoor unit 10 is reduced, and the condenser fins 11 are prevented from frosting or rusting.

[0051] Furthermore, a flow equalization plate 75 is also provided inside the buffer cavity 71. The flow equalization plate 75 is located below the baffle plate 74 and is at a predetermined distance from the baffle plate 74. The flow equalization plate 75 is provided with uniformly distributed flow holes 751. In this application, the flow equalization plate 75 can absorb the flow diversion effect of the baffle plate 74 and make the airflow velocity more uniform, thereby improving the defrosting or cooling effect on the heat dissipation fins 11. Moreover, the cross-sectional dimensions of the flow equalization plate 75 and the buffer cavity 71 are matched, which can block short-circuit flow and force the airflow to pass through the flow holes 751, ensuring that the airflow in all areas of the buffer cavity 71 participates in mixing and pressure stabilization, ultimately improving the uniformity of the wind speed when flowing out from the outlet end 73. In addition, the uniformly distributed flow holes 751 achieve airflow velocity uniformity, ensuring that the airflow enters the heat dissipation fins 11 of the outdoor unit 10 at a nearly uniform speed, thereby ensuring heat exchange efficiency. Of course, in other embodiments of this application, the diameter of the flow hole 751 can be set differently, and can be adjusted adaptively according to actual needs. This application does not make specific limitations.

[0052] Furthermore, in this application, a predetermined distance is maintained between the baffle plate 74 and the flow equalization plate 75. For example, this predetermined distance can be a spacing of 5-10 times the aperture of the flow-through holes 751. This predetermined distance allows the airflow to form a buffer transition zone between the baffle plate 74 and the flow equalization plate 75, providing sufficient space for the split airflow to diffuse, mix, and establish a stable static pressure field. When the airflow passes through the flow equalization plate 75, the stable static pressure ensures a more balanced flow rate across each flow-through hole 751, providing better intake conditions for defrosting or cooling the outdoor unit 10.

[0053] Furthermore, the air outlet 73 is provided with a guide vane 731, which is inclined towards the outdoor unit 10. The heat dissipation fins 11 of the outdoor unit 10 typically have a fixed optimal airflow contact direction. For example, the airflow needs to flow parallel along the gaps between the heat dissipation fins 11 to maximize the heat exchange area. The guide vane 731 forcibly changes the airflow direction by tilting at an angle (e.g., 30°-60° with the horizontal), so that the airflow flowing out of the buffer chamber 71 is precisely aligned with the air inlet area of ​​the outdoor unit 10 or the optimal contact angle of the heat dissipation fins 11, preventing the airflow from deviating from the target area due to natural diffusion, thereby ensuring that the airflow enters the heat exchange core area efficiently. Of course, in other embodiments of this application, the tilt angle of the guide vane 731 can also be other angles. This application does not impose specific limitations, and the tilt angle can be selected according to the actual situation.

[0054] If the airflow enters the outdoor unit 10 directly from the outlet 73 without guidance, the high-speed airflow may collide vertically with or cause turbulent friction with the internal components of the outdoor unit 10, generating impact noise. The inclined guide vane 731 allows the airflow to enter the outdoor unit 10 gradually at a smooth oblique angle, reducing the impact force between the airflow and the components, and reducing turbulent vortices caused by sudden changes in airflow direction. This significantly reduces the noise during system operation and improves the quietness of the indoor and outdoor environments.

[0055] As can be seen from the above embodiments, the indoor ventilation heat exchange system provided in this application can achieve at least the following technical effects:

[0056] (1) This application delivers indoor air to the outdoor unit by setting up an air supply channel, and uses the indoor air to defrost or cool the outdoor unit, recovers the energy lost during indoor ventilation, and exchanges this part of the energy with the outdoor unit for heat, which not only reduces the air conditioning operating load and saves energy, but also extends the service life of the outdoor unit, reduces maintenance costs and the frequency of equipment replacement.

[0057] (2) This application extends the air flow path of the room by setting the air outlet of the air inlet channel and the air inlet of the air supply channel on the opposite side walls of the room, and the height of the air inlet is greater than the height of the air outlet, thereby improving the uniformity of air exchange. It also utilizes the difference in air density to enhance natural convection circulation and improve heat exchange efficiency.

[0058] (3) This application provides a buffer device between the air supply duct and the outdoor unit, which allows the airflow from the air supply duct to enter the heat dissipation fins of the outdoor unit at a more uniform flow rate for defrosting or cooling.

[0059] (4) This application also includes an air inlet pipe and a heat exchange device, with the two ends of the heat exchange device respectively set in the air inlet pipe and the air supply channel. By recovering the air energy in the air supply channel, the ambient air introduced into the air inlet pipe is preheated or precooled, thereby improving the capacity utilization efficiency of the indoor ventilation system and optimizing the operating conditions of the outdoor unit.

[0060] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0061] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0062] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An indoor ventilation and heat exchange system, characterized in that, include: An air conditioner body, the air conditioner body includes an indoor unit and an outdoor unit (10), the indoor unit is used to be installed in a room (30), and the outdoor unit (10) is used to be installed outside the room (30); An air supply assembly (20) includes an air supply duct (21) which is at least used to connect the interior and exterior of the room (30) and to deliver air from the room (30) to the outdoor unit (10) for defrosting or cooling the outdoor unit (10).

2. The indoor ventilation and heat exchange system according to claim 1, characterized in that, The air supply channel (21) includes an air outlet (212), and the outdoor unit (10) includes heat dissipation fins (11), which are disposed near the air outlet (212).

3. The indoor ventilation and heat exchange system according to claim 1, characterized in that, The air supply assembly (20) also includes a fan (22), which is disposed inside or at the end of the air supply channel (21).

4. The indoor ventilation and heat exchange system according to claim 2, characterized in that, The indoor ventilation and heat exchange system also includes an air inlet channel (40), which is used to connect the interior and exterior of the room (30). The air inlet channel (40) includes an air outlet (41), and the air supply channel (21) includes an air inlet (211). The air outlet (41) and the air inlet (211) are located on opposite side walls of the room (30). Along the height direction of the room (30), the height of the air inlet (211) is greater than the height of the air outlet (41).

5. The indoor ventilation and heat exchange system according to claim 1, characterized in that, The indoor ventilation heat exchange system also includes a heat exchange device (50) and an air inlet pipe (60). The air inlet pipe (60) delivers air from the environment to the outdoor unit (10). The two ends of the heat exchange device (50) are respectively located in the air supply channel (21) and the air inlet pipe (60).

6. The indoor ventilation heat exchange system according to claim 5, characterized in that, The indoor ventilation heat exchange system further includes a buffer device (70), wherein: The buffer device (70) is disposed between the air supply duct (21) and the outdoor unit (10); and / or, the buffer device (70) is disposed between the air inlet pipe (60) and the outdoor unit (10).

7. The indoor ventilation heat exchange system according to claim 6, characterized in that, The buffer device (70) includes a buffer chamber (71), an air inlet (72) and an air outlet (73). The air inlet (72) is connected to the air outlet (212) of the air supply channel (21), and the air outlet (73) delivers the air in the air supply channel (21) to the outdoor unit (10).

8. The indoor ventilation heat exchange system according to claim 7, characterized in that, A baffle plate (74) is provided inside the buffer cavity (71). The baffle plate (74) is located close to the air inlet end (72), and there is a flow gap (711) between the baffle plate (74) and the inner wall surface of the buffer cavity (71).

9. The indoor ventilation heat exchange system according to claim 8, characterized in that, The buffer cavity (71) is also provided with a flow equalization plate (75), which is located below the baffle plate (74) and has a predetermined distance from the baffle plate (74). The flow equalization plate (75) is provided with uniformly distributed flow holes (751).

10. The indoor ventilation heat exchange system according to any one of claims 7 to 9, characterized in that, The air outlet (73) is provided with a guide vane (731), which is inclined toward the outdoor unit (10).

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