Fresh air conditioner and control method thereof

Abstract

The invention relates to a fresh air conditioner and a control method thereof, relates to the technical field of air conditioning equipment, and aims to solve the problem that indoor temperature and humidity cannot be effectively regulated and controlled by fresh air. In the indoor unit of the fresh air conditioner, a machine shell is provided with an air return opening and an air outlet, and a heat exchanger, an indoor fan and a fresh air cavity are arranged in the machine shell. The indoor fan is used for driving air to sequentially flow through the return air inlet, the heat exchanger and the air outlet. The fresh air cavity is formed in the machine shell and provided with a fresh air inlet, a first air opening and a second air opening. The fresh air inlet is used for supplying fresh air. The fresh air cavity is configured to have a first fresh air state and a second fresh air state. And when the fresh air cavity is switched to the first fresh air state, the fresh air inlet communicates with the first air opening, so that fresh air sequentially flows through the first air opening, the heat exchanger and the air outlet. And when the fresh air cavity is switched to the second fresh air state, the fresh air inlet at least communicates with the second air opening, so that fresh air sequentially flows through the second air opening and the air outlet.

Description

Technical Field

[0001] This application relates to the field of air conditioning equipment technology, and in particular to a fresh air conditioner and its control method. Background Technology

[0002] With the increasing demand for healthy indoor environments, fresh air conditioners, which integrate air conditioning and ventilation functions, are gradually becoming a common choice for homes and commercial spaces. Existing fresh air conditioners typically consist of an indoor unit and a fresh air intake system. Their working principle is to activate the fresh air function when a decline in indoor air quality is detected, introducing outdoor air into the room to refresh the air.

[0003] However, fresh air conditioners can only introduce fresh air directly into the room and cannot effectively regulate the temperature and humidity of the fresh air. Especially when there is a large difference in temperature and humidity between indoors and outdoors, the fresh air introduced directly into the room can easily cause discomfort to users and affect their user experience. Summary of the Invention

[0004] This application provides a fresh air conditioner and its control method, which aims to solve the problem that fresh air cannot effectively regulate indoor temperature and humidity.

[0005] In a first aspect, embodiments of this application provide a fresh air conditioning unit, including an indoor unit. The indoor unit includes a casing, a heat exchanger, an indoor fan, and a fresh air cavity. The casing has a return air inlet and an air outlet. The heat exchanger, indoor fan, and fresh air cavity are disposed within the casing. The indoor fan drives air to flow sequentially through the return air inlet, the heat exchanger, and the air outlet. The fresh air cavity is disposed within the casing and has a fresh air inlet, a first air outlet, and a second air outlet. The fresh air inlet supplies fresh air. The fresh air cavity is configured to have a first fresh air state and a second fresh air state. When the fresh air cavity switches to the first fresh air state, the fresh air inlet is connected to the first air outlet, so that fresh air flows sequentially through the first air outlet, the heat exchanger, and the air outlet. When the fresh air cavity switches to the second fresh air state, the fresh air inlet is at least connected to the second air outlet, so that fresh air flows sequentially through the second air outlet and the air outlet.

[0006] In some implementations, the fresh air cavity includes a fresh air cavity shell, a baffle plate, and a drive motor. An air guide cavity is provided inside the fresh air cavity shell, which has a fresh air inlet, a first air outlet, and a second air outlet communicating with the air guide cavity. The baffle plate is located inside the air guide cavity and is rotatably connected to the fresh air cavity shell. The drive motor is connected to the baffle plate and is used to drive the baffle plate to rotate within the air guide cavity.

[0007] When the fresh air chamber switches to the first fresh air state, the drive motor drives the baffle to rotate to the first preset position so that the fresh air inlet is connected to the first air outlet and the fresh air inlet is prevented from being connected to the second air outlet.

[0008] When the fresh air chamber switches to the second fresh air state, the drive motor drives the baffle to rotate to the second preset position so that the fresh air inlet is at least connected to the second air outlet.

[0009] In some implementations, the fresh air chamber is equipped with an air guide channel, and the first air inlet is located within the air guide channel. When the baffle is in the second preset position, the baffle blocks the air guide channel to prevent the fresh air inlet from communicating with the first air inlet. When the baffle is in the first preset position, the baffle is located between the air guide channel and the second air inlet.

[0010] In some implementations, the indoor unit also includes a first temperature sensor, a first humidity sensor, and a control module. The first temperature sensor is located at the return air vent and is used to detect a first temperature parameter. The first humidity sensor is located at the return air vent and is used to detect a first humidity parameter. The first temperature sensor, the first humidity sensor, the indoor fan, and the drive motor are electrically connected to the control module.

[0011] In some implementations, the fresh air conditioning system also includes at least one of a second temperature sensor, a second humidity sensor, and a communication module. The second temperature sensor is located at the outdoor unit and electrically connected to the control module; the second temperature sensor is used to detect a second temperature parameter of the external environment. The second humidity sensor is located at the outdoor unit and electrically connected to the control module; the second humidity sensor is used to detect a second humidity parameter of the external environment. The control module is electrically connected to the communication module and is used to acquire weather forecast parameters.

[0012] In some implementations, the fresh air cavity extends along a first direction, which is the length direction of the air outlet.

[0013] In some implementations, there are multiple first air vents, which are spaced apart along a first direction. There are also multiple second air vents, which are spaced apart along the first direction.

[0014] In some implementations, the diameter of the first and second air inlets is 1.5-5mm.

[0015] In some implementations, along the airflow direction, the diameter of the first air outlet on the air outlet side is larger, and the diameter of the second air outlet on the air outlet side is also larger.

[0016] In some implementations, the fresh air cavity is located between the front side wall of the casing and the heat exchanger, with the first air inlet facing rearward and the second air inlet facing downward and connected to the air outlet.

[0017] In some implementations, the indoor unit also includes an electrical box and a fresh air fan. Inside the casing, the electrical box and the fresh air fan are arranged on the same side of the heat exchanger along a first direction, and sequentially arranged along a second direction. The first direction is the length direction of the air outlet, and the second direction forms an angle with the first direction.

[0018] In some implementations, along the first direction, the width of the electrical box is greater than or equal to the width of the fresh air fan.

[0019] Secondly, embodiments of this application provide a control method for a fresh air conditioning unit, used to control the fresh air conditioning unit as described in the first aspect, the control method including: Turn on the fresh air conditioning.

[0020] The system obtains the set temperature of the indoor unit and the first temperature parameter of the environment where the indoor unit is located, and obtains the second temperature parameter and the second humidity parameter of the outdoor environment.

[0021] Determine the relationship between the first humidity parameter and the first and second thresholds, where the first threshold is less than the second threshold.

[0022] If the first humidity parameter is less than the first threshold, the fresh air chamber is controlled to switch to the second fresh air state.

[0023] If the first humidity parameter is greater than the second threshold, the fresh air chamber is controlled to switch to the first fresh air state.

[0024] In some implementations, after determining the relationship between the first humidity parameter and a first threshold and a second threshold, the control method includes: If the first humidity parameter is greater than or equal to the first threshold and less than or equal to the second threshold.

[0025] The outdoor dew point temperature T is calculated using the formula T = T2 - (100 - RH2) / 5. Here, T2 is the second temperature parameter, and RH2 is the second humidity parameter.

[0026] Determine if the set temperature of the indoor unit is higher than the dew point temperature.

[0027] If the set temperature is higher than the dew point temperature, the fresh air chamber will switch to the second fresh air state.

[0028] If the set temperature is less than or equal to the dew point temperature, the fresh air chamber will be switched to the first fresh air state.

[0029] In some implementations, where the fresh air conditioning unit includes a communication module used to acquire weather forecast parameters, the control method further includes the following after the fresh air conditioning unit is started: Obtain local weather forecast parameters and set temperature. Weather forecast parameters include weather type, air humidity, and air dew point temperature.

[0030] Determine whether the preset conditions are met.

[0031] If the weather type is rainy or snowy, and at least one of the following conditions is met: air humidity is greater than the second threshold, or the set temperature is lower than the dew point temperature, then the preset conditions are satisfied. Control the fresh air chamber to switch to the first fresh air state.

[0032] Otherwise, control the fresh air chamber to switch to the second fresh air state.

[0033] In some implementations, after starting the fresh air conditioning system, the control methods also include: Obtain the first temperature and humidity parameters of the environment within a preset time before the indoor unit starts.

[0034] Calculate the first rate of change of the first temperature parameter within a preset time period, and calculate the second rate of change of the first humidity parameter within a preset time period.

[0035] Determine whether the first and second rates of change are greater than the third threshold.

[0036] If the first and second change rates are greater than the third threshold, the fresh air cavity is controlled to switch to the first fresh air state.

[0037] Otherwise, control the fresh air chamber to switch to the second fresh air state.

[0038] The technical solutions provided in this application have the following advantages compared with the prior art: When the fresh air chamber switches to the first fresh air mode, the fresh air inlet is connected to the first air outlet. Driven by the indoor fan, the fresh air flows sequentially through the first air outlet, the heat exchanger, and the air outlet. The fresh air, after being heated by the heat exchanger, is mixed with the return air before being sent into the room. In this state, the introduced fresh air undergoes temperature and humidity regulation at the heat exchanger and is finally sent out through the indoor unit's air outlet along with the indoor recirculated air. This prevents the fresh air from affecting the temperature and humidity regulation of the room, ensuring that the indoor environment remains within a stable and suitable temperature and humidity range.

[0039] When the fresh air chamber switches to the second fresh air mode, the fresh air inlet is connected to at least the second air outlet. Fresh air can flow directly to the air outlet of the indoor unit through the second air outlet, so that at least part of the fresh air flows through the second air outlet and the air outlet in sequence and is sent into the room without heat exchange regulation, which helps to improve the overall energy efficiency ratio of the fresh air air conditioner.

[0040] This system features a switchable fresh air cavity within the indoor unit, allowing for flexible adjustment of the fresh air's path based on indoor and outdoor temperature and humidity differences. When temperature and humidity control is required, the fresh air is guided to the heat exchanger, preventing significant fluctuations in indoor temperature and humidity caused by direct air intake, thus reducing or eliminating user discomfort. When temperature and humidity control is not needed, the fresh air can be directly introduced into the room, ensuring sufficient airflow and improving the energy efficiency ratio of the air conditioner. This enhances the user experience and comfort of the air conditioner. Attached Figure Description The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0041] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0042] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0043] Figure 1 A three-dimensional structural diagram of the indoor unit of a fresh air conditioner provided in an embodiment of this application; Figure 2 for Figure 1 The diagram shows the internal structure of the indoor unit. Figure 3 for Figure 1 The image shown is a cross-sectional view of the indoor unit in the first fresh air condition. Figure 4 for Figure 1 The image shows a cross-sectional view of the indoor unit in the second fresh air configuration. Figure 5 This is a three-dimensional structural diagram of a fresh air cavity provided in an embodiment of this application; Figure 6 for Figure 5 A three-dimensional structural schematic diagram of the fresh air chamber shell shown in the figure; Figure 7 A cross-sectional view of the first type of fresh air cavity provided in the embodiments of this application in a first fresh air state; Figure 8 A cross-sectional view of the first type of fresh air cavity provided in the embodiments of this application in a second fresh air state; Figure 9 A cross-sectional view of the second type of fresh air cavity provided in the embodiments of this application in the first fresh air state; Figure 10 A cross-sectional view of the second type of fresh air cavity provided in the embodiments of this application in a second fresh air state; Figure 11 This application provides an electrical connection diagram of a fresh air conditioner as an embodiment of the present application. Figure 12 for Figure 2 A three-dimensional structural diagram of the fresh air fan shown in the figure; Figure 13 A flowchart illustrating a control method for a fresh air conditioning system provided in this application embodiment; Figure 14 This is a schematic diagram of the connection structure of a control module for a fresh air conditioner provided in an embodiment of this application.

[0044] Explanation of reference numerals in the attached figures: 100. Fresh air conditioning; 10. Indoor unit; 11. Unit casing; 111. Return air vent; 112. Air outlet; 113. Water collection tray; 12. Heat exchanger; 13. Indoor fan; 14. Fresh air chamber; 141. Fresh air inlet; 142. First air outlet; 143. Second air outlet; 144. Fresh air chamber shell; 145. Air guide chamber; 146. Baffle plate; 147. Drive motor; 148. Air guide duct; 151. Control module; 1511. Processor; 1512. Communication interface; 1513. Memory; 1514. Communication bus; 152. First temperature sensor; 153. First humidity sensor; 154. Second temperature sensor; 155. Second humidity sensor; 156. Communication module; 16. Electrical box; 17. Fresh air fan; 171. First fresh air inlet; 172. Second fresh air inlet; X, first direction; Y, second direction; Z, third direction. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0046] The following disclosure provides numerous different embodiments or examples for implementing various structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0047] For ease of description, spatial relative terms may be used in the text to describe the relative position or movement of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "front," "back," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure undergoes a positional flip, orientation change, or change of motion, these directional indications will change accordingly. For instance, an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0048] Please see Figures 1 to 14 This application provides a fresh air conditioner and its control method, which aims to solve the problem that fresh air cannot effectively regulate indoor temperature and humidity.

[0049] Firstly, this application provides a fresh air conditioning system, such as... Figure 1 and Figure 2 As shown, the fresh air conditioner 100 includes an indoor unit 10, combined with... Figure 3 and Figure 4 The indoor unit 10 includes a casing 11, a heat exchanger 12, an indoor fan 13, and a fresh air chamber 14. The casing 11 has a return air inlet 111 and an air outlet 112. The heat exchanger 12, the indoor fan 13, and the fresh air chamber 14 are disposed inside the casing 11. The indoor fan 13 drives air to flow sequentially through the return air inlet 111, the heat exchanger 12, and the air outlet 112.

[0050] like Figure 5 and Figure 6 As shown, the fresh air chamber 14 is disposed on the housing 11 (refer to...). Figure 2The fresh air chamber 14 has a fresh air inlet 141, a first air vent 142, and a second air vent 143. The fresh air inlet 141 is used to supply fresh air. The fresh air chamber 14 is configured to have a first fresh air state and a second fresh air state.

[0051] When the fresh air chamber 14 is switched to Figure 3 and Figure 7 In the first fresh air state shown, the fresh air inlet 141 is connected to the first air outlet 142. Driven by the indoor fan 13, the fresh air flows sequentially through the first air outlet 142, the heat exchanger 12, and the air outlet 112. The fresh air, after being heated by the heat exchanger 12, is mixed with the return air and then sent into the room. In this state, the introduced fresh air undergoes temperature and humidity regulation at the heat exchanger 12, and is finally sent out together with the indoor circulating air through the air outlet 112 of the indoor unit 10. This is to prevent the fresh air from affecting the temperature and humidity regulation of the room, so as to keep the indoor environment within a stable and suitable temperature and humidity range.

[0052] When the fresh air chamber 14 is switched to Figure 4 and Figure 8 In the second fresh air state shown, the fresh air inlet 141 is at least connected to the second air outlet 143. Fresh air can flow directly from the second air outlet 143 to the air outlet 112 of the indoor unit 10, so that at least part of the fresh air flows through the second air outlet 143 and the air outlet 112 in sequence and is sent into the room without passing through the heat exchanger 12 for heat exchange and regulation, which is beneficial to improving the overall energy efficiency ratio of the fresh air air conditioner 100.

[0053] By incorporating a switchable fresh air cavity 14 within the indoor unit 10, the system can flexibly select whether the fresh air passes through the heat exchanger 12 for adjustment based on differences in indoor and outdoor temperature and humidity. When temperature and humidity control of the fresh air is required, it is guided to the heat exchanger 12, avoiding significant fluctuations in indoor temperature and humidity caused by directly introducing fresh air, thus reducing or preventing user discomfort. When temperature and humidity control of the fresh air is not required, it can be directly introduced into the room, ensuring sufficient fresh air volume and improving the energy efficiency ratio of the fresh air conditioner. This enhances the user experience and comfort of the fresh air conditioner 100.

[0054] For example, such as Figure 5 and Figure 6 As shown, the fresh air chamber 14 includes a fresh air chamber shell 144 and a drive motor 147. Combined with... Figure 7 and Figure 8The fresh air chamber shell 144 is provided with an air guide chamber 145. The fresh air chamber shell 144 is provided with a fresh air inlet 141, a first air outlet 142 and a second air outlet 143 that are connected to the air guide chamber 145. The fresh air chamber 14 also includes a baffle plate 146, which is located in the air guide chamber 145 and is rotatably connected to the fresh air chamber shell 144. A drive motor 147 is connected to the baffle plate 146 and is used to drive the baffle plate 146 to rotate in the air guide chamber 145.

[0055] When the fresh air chamber 14 is switched to Figure 3 and Figure 7 In the first fresh air state shown, drive motor 147 (e.g.) Figure 5 (As shown) This causes the wind deflector 146 to rotate to Figure 7 The first preset position shown is such that the fresh air inlet 141 (refer to) Figure 6 It connects with the first air inlet 142 and prevents the fresh air inlet 141 from connecting with the second air inlet 143.

[0056] When the fresh air chamber 14 is switched to Figure 4 and Figure 8 In the second fresh air state shown, the drive motor 147 drives the baffle plate 146 to rotate to Figure 8 The second preset position is shown so that the fresh air inlet 141 is at least connected to the second air outlet 143.

[0057] The fresh air chamber shell 144 is the main structure constituting the fresh air chamber 14, and an air guide chamber 145 is formed inside it to guide the flow of fresh air. The fresh air chamber shell 144 is usually integrally molded or spliced ​​from plastic or metal materials, and its design needs to take into account airtightness, strength and integration with other components of the indoor unit 10.

[0058] For example, the fresh air cavity 14 extends along the first direction X, which is the length direction of the air outlet 112. This allows the fresh air cavity 14 to match the width of the air outlet 112 of the indoor unit 10, thereby laying a structural foundation for the uniform mixing of fresh air and return air.

[0059] The fresh air chamber shell 144 has a fresh air inlet 141, a first air vent 142, and a second air vent 143. These air vents are channels for fresh air to enter and exit the air guide chamber 145. Their positions and dimensions are precisely designed to cooperate with the action of the baffle plate 146 to achieve effective control of the fresh air path.

[0060] The first air vent 142 and the second air vent 143 can be configured as strip-shaped holes extending along the first direction X. The number of the first air vent 142 and the second air vent 143 can be one or more, and the multiple strip-shaped holes are distributed at intervals on one side of the fresh air cavity shell 144.

[0061] Alternatively, there may be multiple first air vents 142, which are spaced apart along the first direction X. When the fresh air cavity 14 switches to the first fresh air state, fresh air enters the heat exchanger 12 through multiple dispersed first air vents 142. This multi-point air intake design ensures that the fresh air can more evenly cover the heat exchanger 12 along the first direction X as it flows through it, thereby improving heat exchange efficiency and the uniform mixing effect of fresh air and indoor return air. The first air vents 142 and the second air vents 143 can be designed as circular, square, or slit-shaped, and can be distributed at equal or non-equal intervals according to actual needs.

[0062] There are multiple second air vents 143, which are distributed at intervals along the first direction X. Similarly, when the fresh air cavity 14 switches to the second fresh air state, the fresh air directly enters the air outlet 112 through the multiple dispersed second air vents 143. This helps to achieve preliminary uniform diffusion of fresh air before it enters the indoor space, reducing the phenomenon of too much or too little fresh air in some areas, thereby improving user comfort.

[0063] For example, the diameter of the first air vent 142 and the second air vent 143 is 1.5-5 mm. A smaller diameter helps to increase the injection speed of fresh air and promotes uniform mixing of fresh air and indoor air, but too small a diameter may increase resistance and noise. A larger diameter can reduce flow resistance, but it is not conducive to uniform mixing of fresh air and return air. By setting the diameter of the first air vent 142 and the second air vent 143 to 1.5-5 mm, the first air vent 142 and the second air vent 143 are arranged in an array of microporous structures to ensure that fresh air and return air can be uniformly mixed and circulated quietly.

[0064] For example, along the airflow direction, the first vent 142 has a larger diameter on the outlet side, and the second vent 143 also has a larger diameter on the outlet side. This design is often referred to as a diffuser or flared design. When fresh air passes through the vents, the airflow expands at the outlet, which helps to reduce airflow velocity, reduce turbulence and noise, and allow the fresh air to diffuse more gently into the surrounding environment. For the first vent 142, this helps the fresh air diffuse better before entering the heat exchanger 12. For the second vent 143, it helps the fresh air achieve wider coverage and provide a more comfortable experience when it enters the indoor space directly.

[0065] The baffle 146 is a movable component located within the air guide cavity 145. Driven by the drive motor 147, it selectively opens or closes the communication path between the fresh air inlet 141 and the first air outlet 142 and the second air outlet 143 through its own rotation. The baffle 146 is typically made of lightweight, high-strength materials, such as engineering plastics or thin metal sheets, to ensure that it can rotate quickly and accurately under the drive motor 147. The baffle 146 and the fresh air cavity shell 144 are connected by a rotating connection mechanism (such as a shaft, bearing, etc.) to achieve rotation, and a certain degree of airtightness must be ensured at the first and second preset positions to prevent air leakage.

[0066] The drive motor 147 can be a stepper motor, DC motor, or servo motor, and its selection depends on the required rotational accuracy, speed, and torque. The drive motor 147 is connected to the baffle 146 through a transmission mechanism (such as gears, transmission rods, etc.) to convert the rotational output of the motor into the precise angular position of the baffle 146.

[0067] For example, the drive motor 147 can be electrically connected to and controlled by the control module 151 to drive the baffle 146 to a preset first preset position or a preset second preset position in response to the operating mode of the fresh air conditioner 100.

[0068] The first preset position and the second preset position are two specific angular positions that the baffle plate 146 can reach when it rotates within the air guide cavity 145.

[0069] When the wind deflector 146 is in Figure 7 or Figure 9 When the first preset position is shown, its structural design allows a smooth flow path to be formed between the fresh air inlet 141 and the first air outlet 142, while physically blocking the connection between the fresh air inlet 141 and the second air outlet 143, thereby achieving the purpose of fresh air flowing through the heat exchanger 12.

[0070] When the wind deflector 146 is in Figure 8 or Figure 10 In the second preset position shown, its structural design ensures that at least a partial conductive path is formed between the fresh air inlet 141 and the second air outlet 143. For example... Figure 8 As shown, some fresh air can flow from the first air vent 142 to the heat exchanger 12, while another portion of fresh air can flow directly from the second air vent 143 to the air outlet 112. Figure 10 As shown, fresh air can only flow directly from the second air vent 143 to the air outlet 112, and cannot flow simultaneously from the first air vent 142 to the heat exchanger 12.

[0071] Thus, by setting up the fresh air chamber shell 144, the baffle plate 146 and the drive motor 147, the drive motor 147 can precisely drive the baffle plate 146 to rotate at the first preset position or the second preset position according to the control command, thereby switching the first fresh air state and the second fresh air state of the fresh air chamber 14.

[0072] When the baffle plate 146 is in the first preset position, the fresh air inlet 141 is connected to the first air outlet 142, and the fresh air is guided to the heat exchanger 12 for processing. At the same time, it effectively prevents the fresh air from flowing directly to the second air outlet 143, thus avoiding the direct delivery of untreated fresh air.

[0073] When the baffle 146 is in the second preset position, the fresh air inlet 141 is at least connected to the second air outlet 143, so that at least part of the fresh air can flow directly into the room from the air outlet 112, avoiding unnecessary heat exchange and improving the overall energy efficiency ratio of the fresh air conditioner 100. This ensures that the fresh air can reliably and efficiently select different processing paths according to actual needs, thereby improving the operating efficiency of the fresh air conditioner 100 and the user experience. In some embodiments, such as Figure 10 As shown, the fresh air chamber shell 144 is provided with an air guide groove 148, and the first air outlet 142 is disposed within the air guide groove 148. When the baffle plate 146 is in the second preset position, the baffle plate 146 blocks the air guide groove 148 to prevent the fresh air inlet 141 from communicating with the first air outlet 142. When the baffle plate 146 is in the second preset position... Figure 9 When the first preset position is shown, the wind deflector 146 is located between the air guide 148 and the second air outlet 143.

[0074] The air guide trough 148 is a groove structure disposed inside the fresh air cavity shell 144. The air guide trough 148 extends along the first direction X, and the first air outlet 142 is disposed at the bottom wall of the air guide trough 148. This allows the baffle plate 146, which is rotated to a second preset position (such as an approximately vertical state), to block the opening of the air guide trough 148, thereby preventing fresh air from flowing out of the air guide cavity 145 through the air guide trough 148 and the first air outlet 142 in sequence.

[0075] As shown in the figure, Figure 10 As shown, guided by the front and rear side walls along the second direction Y, the fresh air flows downward through the second air inlet 143 directly to the air outlet 112 of the indoor unit 10, without having to flow through the heat exchanger 12 for heat exchange.

[0076] For example, such as Figure 10As shown, when the baffle plate 146 rotates to the second preset position under the drive of the drive motor 147, it is designed to make close contact with the opening or edge of the air guide slot 148, thereby sealing the air guide slot 148. This sealing can be a physical contact seal, for example, the edge of the baffle plate 146 is provided with a sealing strip, or the baffle plate 146 itself has a high fitting precision with the air guide slot 148, to ensure that in the second fresh air state, the airflow channel between the fresh air inlet 141 and the first air outlet 142 is completely cut off. In this way, the fresh air is forcibly guided to the second air outlet 143 and cannot enter the path leading to the heat exchanger 12.

[0077] like Figure 9 As shown, when the baffle 146 rotates to the first preset position driven by the drive motor 147, its position is precisely set between the air guide slot 148 and the second air outlet 143. In this position, the baffle 146 acts as a diverter. On one hand, it no longer blocks the air guide slot 148, allowing the fresh air inlet 141 to form a communication path with the air guide slot 148 (and consequently with the first air outlet 142), allowing fresh air to flow towards the heat exchanger 12. On the other hand, the baffle 146 simultaneously blocks or deflects the path of fresh air towards the second air outlet 143, ensuring that the fresh air is primarily processed through the first air outlet 142. The shape and rotation axis of the baffle 146 are optimized to achieve the best airflow control and sealing effect at the two preset positions.

[0078] By setting an air guide slot 148 inside the fresh air chamber shell 144 and placing the first air outlet 142 therein, a clear channel is provided for the fresh air to flow to the heat exchanger 12. When the baffle 146 is in the second preset position, it can effectively block the air guide slot 148, thereby completely preventing the fresh air inlet 141 from communicating with the first air outlet 142, ensuring that the fresh air flows completely to the second air outlet 143, and avoiding unnecessary energy loss and air crossflow. Conversely, when the baffle 146 is in the first preset position, it is precisely located between the air guide slot 148 and the second air outlet 143, allowing the fresh air to flow smoothly through the first air outlet 142 to the heat exchanger 12, while effectively blocking the fresh air from flowing directly to the second air outlet 143. This further improves the airflow path control accuracy and system operating efficiency of the fresh air conditioning 100 in different working modes, ensuring the fresh air treatment effect.

[0079] In some embodiments, such as Figure 10 As shown, the indoor unit 10 also includes a first temperature sensor 152, a first humidity sensor 153, and a control module 151. The first temperature sensor 152 is located at the return air vent 111 (see reference). Figure 2The first temperature sensor 152, the first humidity sensor 153, the indoor fan 13, and the drive motor 147 are electrically connected to the control module 151.

[0080] The first temperature sensor 152 is an electronic component used to measure ambient temperature. It is located at the return air vent 111 and its main function is to monitor the temperature of the indoor return air in real time, i.e., the current temperature of the indoor environment. This sensor can be of various types, such as a thermistor, thermocouple, or platinum resistance thermometer, and it converts the temperature signal into an electrical signal, which is then output to the control module 151. For example, an NTC thermistor can be used, whose resistance value changes with temperature. The control module 151 calculates accurate temperature parameters by measuring its resistance value.

[0081] The first humidity sensor 153 is an electronic component used to measure the relative humidity of the environment. It is located at the return air vent 111 and its main function is to monitor the humidity of the indoor return air in real time, that is, the current humidity status of the indoor environment. This sensor can be a capacitive humidity sensor, a resistive humidity sensor, etc. For example, a capacitive humidity sensor measures humidity by sensing changes in the dielectric constant and converts the humidity signal into an electrical signal, which is then output to the control module 151.

[0082] The first temperature sensor 152 and the first humidity sensor 153 can be an integrated structure or a separate structure, and there is no limitation on this.

[0083] The control module 151 is electrically connected to the first temperature sensor 152, the first humidity sensor 153, the indoor fan 13, and the drive motor 147. Its core function is to receive indoor temperature and humidity parameters detected by the first temperature sensor 152 and the first humidity sensor 153. Based on these parameters, combined with user settings or other operating strategies, the control module 151 can precisely control the indoor fan 13 (e.g., adjusting the fan speed) and the drive motor 147 (e.g., controlling the rotation position of the baffle 146, thereby switching the state of the fresh air chamber 14). The control module 151 typically consists of a microcontroller (MCU), memory, input / output interfaces, etc., and has built-in corresponding control algorithms and programs.

[0084] By installing a first temperature sensor 152 and a first humidity sensor 153 at the return air vent 111, this application enables the fresh air conditioning system 100 to accurately sense the temperature and humidity parameters of the indoor environment in real time. The control module 151 is electrically connected to these sensors, the indoor fan 13, and the drive motor 147, and is able to receive and process this real-time environmental data. Based on these precise indoor environmental parameters, the control module 151 can intelligently decide the switching state of the fresh air chamber 14.

[0085] For example, when excessive indoor humidity is detected, the control module 151 can instruct the drive motor 147 to rotate the baffle 146 to a first preset position, allowing fresh air to flow through the heat exchanger 12 for dehumidification. When both indoor temperature and humidity are within a comfortable range, and only fresh air needs to be introduced, the control module 151 can instruct the drive motor 147 to rotate the baffle 146 to a second preset position, allowing fresh air to be directly delivered, avoiding unnecessary heat exchange energy consumption. This intelligent control based on real-time indoor environmental perception ensures that the introduced fresh air always matches the indoor environmental requirements, effectively improving user comfort and significantly reducing energy consumption during the fresh air introduction process, avoiding indoor environmental deterioration or increased energy consumption caused by blindly introducing fresh air.

[0086] Continue to refer to Figure 11 The fresh air conditioner 100 also includes at least one of a second temperature sensor 154, a second humidity sensor 155, and a communication module 156. The second temperature sensor 154 is located at the outdoor unit and electrically connected to the control module 151, and is used to detect a second temperature parameter of the external environment. The second humidity sensor 155 is located at the outdoor unit and electrically connected to the control module 151, and is used to detect a second humidity parameter of the external environment. The control module 151 is electrically connected to the communication module 156 and is used to acquire weather forecast parameters.

[0087] The second temperature sensor 154 and the second humidity sensor 155 can be configured similarly to the first temperature sensor 152 and the first humidity sensor 153. At the outdoor unit, the second temperature sensor 154 and the second humidity sensor 155 can be located at the return air vent, upstream of the outdoor heat exchanger, or in a location far from the outdoor heat exchanger to avoid the heat from the outdoor heat exchanger affecting the detection results. This ensures that the second temperature sensor 154 and the second humidity sensor 155 can accurately detect the second temperature and second humidity parameters of the environment where the outdoor unit is located.

[0088] The communication module 156 can be a built-in Wi-Fi module, a cellular network module (such as a 4G / 5G module), or an Ethernet interface. By connecting to the Internet, it obtains real-time or forecast weather data from the weather service provider's server. Weather forecast parameters typically include weather type (such as sunny, rainy, snowy), air humidity, and air dew point temperature.

[0089] By introducing a second temperature sensor 154 and a second humidity sensor 155, the control module 151 can comprehensively sense the indoor and outdoor temperature and humidity conditions. Based on these real-time indoor and outdoor environmental parameters, the control module 151 can intelligently determine when to introduce fresh air and what type of fresh air to introduce. For example, when the outdoor temperature and humidity are suitable, the system can prioritize introducing fresh air to improve indoor air quality. When the outdoor environment is too harsh (such as high temperature and high humidity or low temperature and dryness), the introduction of fresh air can be reduced or suspended, thereby avoiding unnecessary energy consumption and a decrease in indoor comfort. The temperature and humidity of the fresh air can also be adjusted by the heat exchanger 12 to meet the real-time supply of fresh air.

[0090] Furthermore, the control module 151 can also acquire weather forecast parameters through the communication module 156, enabling it to be aware of weather changes, such as impending rain or snow, or extreme temperature and humidity conditions. This predictive control capability allows the fresh air conditioning unit 100 to adopt more proactive strategies, such as introducing fresh air in advance before outdoor air quality is expected to deteriorate, or adjusting the fresh air introduction mode before the arrival of high humidity weather. This ensures indoor air quality while maximizing energy consumption and significantly improving user comfort.

[0091] In some embodiments, such as Figure 2 and Figure 3 As shown, the fresh air cavity 14 is located between the front side wall of the casing 11 and the heat exchanger 12. The first air outlet 142 is arranged facing rearward, and the second air outlet 143 is arranged facing downward and connected to the air outlet 112.

[0092] The fresh air cavity 14 is an internal structure used to guide the flow of fresh air, and its placement is crucial to the spatial layout and airflow organization of the entire indoor unit 10. Positioning it between the front wall of the casing 11 and the heat exchanger 12 means that the fresh air cavity 14 is cleverly integrated into the internal space of the indoor unit 10, utilizing the gaps that typically exist between these components. This layout helps optimize the overall size of the indoor unit 10, achieving a compact design, while ensuring that fresh air can be effectively introduced and directed to subsequent treatment stages. For example, the fresh air cavity 14 can be made of injection-molded plastic or sheet metal, and its shape can be customized according to the available space inside the casing 11 to maximize space utilization and reduce interference with other components.

[0093] A first air vent 142 is arranged rearward along the second direction Y so that the fresh air flowing out of the first air vent 142 can be blown directly and evenly onto the heat exchanger 12, thereby maximizing the contact area and time between the fresh air and the heat exchanger 12.

[0094] The second air vent 143 is another air outlet 112 of the fresh air cavity 14, used to directly guide fresh air to the air outlet 112 of the indoor unit 10 in the second fresh air mode. The second air vent 143 is positioned downwards along the third direction (Z), allowing the fresh air flowing out from it to directly communicate with the bottom air outlet 112 of the indoor unit 10. This design enables the fresh air to quickly and directly mix with the circulating air of the indoor unit 10, or be directly discharged, without needing to undergo deep treatment by the heat exchanger 12, ensuring smooth airflow mixing and discharge.

[0095] In some embodiments, such as Figure 3 and Figure 4 As shown, the housing 11 is also provided with a water receiving trough 113. Along the second direction, on the side of the fresh air cavity 14 away from the front side wall, the bottom of the heat exchanger 12 is provided with a water receiving trough 113 structure.

[0096] Since the outdoor air flowing through the heat exchanger 12 usually has high humidity, the heat exchanger 12 will produce condensate. By setting a water collection tank 113 at the bottom of the heat exchanger 12, the condensate generated and dripping from the heat exchanger 12 can be collected in the water collection tank 113 and then smoothly discharged, avoiding the long-term accumulation and deterioration of condensate that affects indoor air quality.

[0097] Under the action of the indoor fan 13, the heat exchanger 12 is on the low-pressure side near the air outlet 112 along the airflow direction. When the fresh air cavity 14 is in the first fresh air state, the outdoor fresh air can flow sequentially through the heat exchanger 12 and the air outlet 112 along the fresh air inlet 141, the air guide cavity 145, and the first air outlet 142. Similarly, since the air outlet 112 is also on the low-pressure side, when the fresh air cavity 14 is in the second fresh air state, the outdoor fresh air can flow directly to the air outlet 112 sequentially along the fresh air inlet 141, the air guide cavity 145, and the second air outlet 143.

[0098] In some other embodiments, such as Figure 2 As shown, the indoor unit 10 also includes an electrical box 16 and a fresh air fan 17. In the casing 11 (see reference...) Figure 1 Inside the heat exchanger 12, the electrical box 16 and the fresh air fan 17 are arranged on the same side along the first direction X, and the electrical box 16 and the fresh air fan 17 are arranged sequentially along the third direction Z. Here, the first direction X is the length direction of the air outlet 112, and the third direction Z has an angle with the first direction X.

[0099] The electrical box 16 is a component used to house and protect the air conditioner's electrical components. It typically integrates control modules such as control circuit boards, power modules, relays, and terminal blocks. It is responsible for receiving control commands, driving the indoor fan 13 and the fresh air fan 17, controlling the operating mode of the heat exchanger 12, and communicating with other sensors and actuators. The electrical box 16 can be encapsulated in a plastic or metal shell and possesses good insulation and heat dissipation properties to ensure the stable operation and safe use of the internal electronic components.

[0100] The fresh air fan 17 is a power unit specifically designed to introduce fresh outdoor air into the fresh air cavity 14 of the indoor unit 10. For example... Figure 12 As shown, the fresh air fan 17 includes a housing, with a first fresh air inlet 171 (air inlet) and a second fresh air inlet 172 (air outlet). The first fresh air inlet 171 is used to connect to the external environment, and the second fresh air inlet 172 is used to connect to... Figure 6 The fresh air inlet is shown.

[0101] Inside the housing between the first fresh air inlet 171 and the second fresh air inlet 172, a centrifugal fan (or axial fan) and a filter device are usually provided. The centrifugal fan generates airflow by rotating blades, which sends the fresh air from outside into the air guide cavity 145. The filter device is used to filter impurities in the fresh air.

[0102] In order to optimize the internal space utilization and structural compactness of the indoor unit 10, the electrical box 16 and the fresh air fan 17 are arranged on the same side of the heat exchanger 12 along the first direction X inside the casing 11, and the electrical box 16 and the fresh air fan 17 are arranged sequentially along the third direction Z.

[0103] Here, the first direction X is defined as the length direction of the air outlet 112. The third direction Z forms an angle with the first direction X. This angle can be 90 degrees (perpendicular to the first direction X) or other angles, such as 45 degrees. Taking the first direction X as a left-right direction as an example, the third direction Z can be a front-back direction or a vertical direction.

[0104] In the indoor unit 10 of a wall-mounted air conditioner, the air outlet 112 is typically elongated, and its length determines the main lateral (i.e., left-right) dimension of the indoor unit 10. Arranging the components along this direction helps to utilize the overall width space of the indoor unit 10. This is achieved by compressing the dimensions of the electrical box 16 in the front-back or vertical directions to accommodate the fresh air fan 17. By staggering or stacking the components, a compact arrangement can be achieved, thereby optimizing space utilization and avoiding the need for the additional fresh air fan 17 to increase the width of the indoor unit 10.

[0105] This ingenious layout, where the electrical box 16 and the fresh air fan 17 are concentrated on one side of the heat exchanger 12 and arranged sequentially along the vertical or front-back direction, effectively integrates these two components compactly within the limited internal space of the casing 11. This minimizes their space occupation in the width direction (i.e., the first direction X), thus avoiding lateral volume expansion of the indoor unit 10 due to component stacking, contributing to a compact design of the indoor unit 10 and reducing its overall size.

[0106] It should be noted that, in the embodiments of this application, as specifically illustrated in the figure, the first direction X is the left-right direction, the second direction Y is the front-back direction, and the third direction Z is the up-down direction.

[0107] In some embodiments, along the first direction X, the width of the electrical box 16 is greater than or equal to the width of the fresh air fan 17.

[0108] By optimizing the dimensions of the electrical box 16 and the fresh air fan 17 along the first direction X, the width of the electrical box 16 is greater than or equal to the width of the fresh air fan 17. This design effectively utilizes the vertical or horizontal airflow at the location of the electrical box 16 to accommodate the fresh air fan, avoiding any additional increase in the lateral dimension of the indoor unit 10. This results in a more compact and efficient internal structural layout for the indoor unit 10, making the structure of the indoor unit 10 of the fresh air conditioner 100 more rational and compact.

[0109] Secondly, this application also provides a method for controlling a fresh air conditioning unit, used to control the fresh air conditioning unit 100 in the first aspect, such as... Figure 13 As shown, the control method includes the following steps: Turn on the fresh air conditioning unit.

[0110] The set temperature T0 of the indoor unit 10 and the first temperature parameter T1 of the environment where the indoor unit 10 is located are obtained, and the second temperature parameter T2 and the second humidity parameter RH2 of the outdoor environment are obtained.

[0111] Determine the relationship between the first humidity parameter RH1 and the first threshold W1 and the second threshold W2, where the first threshold W1 is less than the second threshold W2.

[0112] If the first humidity parameter RH1 is less than the first threshold W1, the fresh air chamber 14 is controlled to switch to the second fresh air state.

[0113] If the first humidity parameter RH1 is greater than the second threshold W2, the fresh air chamber 14 is controlled to switch to the first fresh air state.

[0114] Since the above-mentioned control method for fresh air conditioning is used to control the fresh air conditioning 100 in the first aspect, the control method for fresh air conditioning has all the beneficial effects of the fresh air conditioning 100, which will not be elaborated here.

[0115] After the air conditioner is turned on, the system will acquire the set temperature T0 of the indoor unit 10. This set temperature T0 is usually input by the user through the operation panel or remote control, or preset by the smart home system. At the same time, the system will also acquire the first humidity parameter RH1 of the indoor environment, and the second temperature parameter T2 and the second humidity parameter RH2 of the outdoor environment. These parameters can be detected in real time by the first humidity sensor 153, the second temperature sensor 154, and the second humidity sensor 155.

[0116] Here, the first threshold W1 and the second threshold W2 are preset humidity limits, with the first threshold W1 being smaller than the second threshold W2, used to divide different humidity ranges. For example, the value range of the first threshold W1 can be 30%-35%, and the value range of the second threshold W2 can be 60%-70%.

[0117] Specifically, if the detected first humidity parameter RH1 is less than the first threshold W1, it indicates that the indoor air is relatively dry. At this time, the control module 151 will issue a command to control the fresh air chamber 14 to switch to the second fresh air state. When the fresh air chamber 14 is in the second fresh air state, the drive motor 147 drives the baffle 146 to rotate to the second preset position, so that the fresh air inlet 141 and the second air outlet 143 are connected. The fresh air will flow through the second air outlet 143 and the air outlet 112 in sequence, thereby directly introducing outdoor fresh air into the room to increase indoor humidity or perform pure ventilation, avoiding excessive dehumidification that would cause the room to become too dry.

[0118] Conversely, if the detected first humidity parameter RH1 is greater than the second threshold W2, it indicates that the indoor air humidity is high. In this case, the control module 151 will control the fresh air chamber 14 to switch to the first fresh air state. When the fresh air chamber 14 is in the first fresh air state, the drive motor 147 drives the baffle 146 to rotate to the first preset position, so that the fresh air inlet 141 is connected to the first air outlet 142, and prevents the fresh air inlet 141 from being connected to the second air outlet 143. At this time, the fresh air will flow through the first air outlet 142, the heat exchanger 12 and the air outlet 112 in sequence, and be dehumidified by the heat exchanger 12 before being sent into the room, effectively reducing the indoor humidity and improving the living comfort.

[0119] Through the above technical solution, the fresh air conditioner 100 can intelligently select the fresh air introduction mode according to the indoor humidity. When the indoor humidity is too low, fresh air is introduced through the second fresh air mode to avoid further drying. When the indoor humidity is too high, fresh air is introduced through the first fresh air mode and dehumidified to effectively control the indoor humidity. This adaptive control strategy not only ensures indoor air quality but also optimizes the fresh air introduction effect under different humidity conditions, improves the user experience, and helps reduce unnecessary energy consumption.

[0120] Continue to refer to Figure 13 After determining the relationship between the first humidity parameter RH1 and the first and second thresholds, the control method further includes the following steps: If the first humidity parameter RH1 is greater than or equal to the first threshold and less than or equal to the second threshold.

[0121] The outdoor dew point temperature T is calculated using the formula T = T2 - (100 - RH2) / 5. Here, T2 is the second temperature parameter T2, and RH2 is the second humidity parameter RH2.

[0122] Determine whether the set temperature T0 of the indoor unit 10 is greater than the dew point temperature T.

[0123] If the set temperature T0 is greater than the dew point temperature T, the fresh air chamber 14 is switched to the second fresh air state.

[0124] If the set temperature T0 is less than or equal to the dew point temperature T, the fresh air chamber 14 is switched to the first fresh air state.

[0125] When the first humidity parameter RH1 falls within the middle range between the first threshold W1 and the second threshold W2, the system initiates a more refined judgment process. At this point, the system no longer simply switches based on indoor humidity levels, but instead incorporates outdoor environmental parameters for a comprehensive judgment.

[0126] The outdoor dew point temperature T is calculated using the formula T = T² - (100 - RH²) / 5. The dew point temperature T is the temperature at which air reaches saturation while maintaining a constant water vapor content. By calculating the outdoor dew point temperature T, the system can accurately assess the actual humidity content of the outdoor air. Subsequently, the system compares the set temperature T0 of the indoor unit 10 with the calculated dew point temperature T. The set temperature T0 is the desired indoor temperature set by the user through the control module 151. This comparison aims to assess the risk of condensation when outdoor fresh air is introduced and cooled to the set temperature T0. If the set temperature T0 is lower than the dew point temperature T, it means that the air may reach saturation during the cooling process, leading to water vapor condensation and excessive indoor humidity, resulting in a poor living experience.

[0127] If the set temperature T0 is greater than the dew point temperature T, it indicates that even if the outdoor air is introduced and cooled to the set temperature T0, its temperature will still be higher than the dew point, and the risk of condensation is low. In this case, the control module 151 will control the fresh air cavity 14 to switch to the second fresh air state. In the second fresh air state, the fresh air inlet 141 is connected to the second air outlet 143, and the fresh air flows through the second air outlet 143 and the air outlet 112 in sequence. This usually means that the fresh air can be directly sent into the room without passing through the heat exchanger 12, thereby reducing the energy consumption of fresh air treatment.

[0128] Conversely, if the set temperature T0 is less than or equal to the dew point temperature T, it means that when outdoor fresh air is introduced and cooled to the set temperature T0, there is a high risk of condensation, which will lead to excessive indoor humidity and a poor living experience. To solve this problem, the control module 151 controls the fresh air chamber 14 to switch to the first fresh air state. In the first fresh air state, the fresh air inlet 141 is connected to the first air outlet 142, and the fresh air flows sequentially through the first air outlet 142, the heat exchanger 12, and the air outlet 112. By pre-treating the fresh air through the heat exchanger 12 (such as dehumidifying), the dew point of the fresh air can be effectively reduced, thereby avoiding excessive indoor humidity and maintaining it within a suitable humidity range. This allows the fresh air conditioner 100 to provide a more intelligent, energy-efficient, and comfortable operating effect under different environmental conditions.

[0129] In some embodiments, such as Figure 13 As shown, when the fresh air conditioner 100 includes a communication module 156, which is used to acquire weather forecast parameters, after the step of starting the fresh air conditioner 100, the control method further includes: Obtain local weather forecast parameters and set temperature T0. Weather forecast parameters include weather type, air humidity, and air dew point temperature T.

[0130] Determine whether the preset conditions are met.

[0131] If the weather type is rainy or snowy, and at least one of the following conditions is met: air humidity is greater than the second threshold W2, and the set temperature T0 is lower than the dew point temperature T, then the preset conditions are satisfied. Control the fresh air chamber 14 to switch to the first fresh air state.

[0132] Otherwise, control the fresh air chamber 14 to switch to the second fresh air state.

[0133] Weather forecast parameters such as weather type, air humidity, and air dew point temperature T can be obtained by the control module 151 through the communication module 156 via network connection. In rainy or snowy weather, when the air humidity is greater than the second threshold W2, or when the set temperature T0 is lower than the dew point temperature T, the fresh air has a high relative humidity. Directly introducing fresh air into the room will significantly increase the indoor air humidity, resulting in excessive dampness and a poor living experience.

[0134] Therefore, the fresh air chamber 14 can be switched to the first fresh air state by the control module 151. In the first fresh air state, the fresh air inlet 141 is connected to the first air outlet 142, and the fresh air flows sequentially through the first air outlet 142, the heat exchanger 12, and the air outlet 112. Pre-treatment (such as dehumidification) of the fresh air by the heat exchanger 12 can effectively reduce the humidity of the fresh air, thereby preventing excessive indoor humidity and maintaining it within a suitable humidity range. This allows the fresh air conditioner 100 to provide a more intelligent, energy-efficient, and comfortable operating effect under different environmental conditions.

[0135] Conversely, when outdoor air humidity is low, fresh air can be directly introduced into the room. For example, control module 151 will control the fresh air chamber 14 to switch to the second fresh air state. In the second fresh air state, the fresh air inlet 141 is connected to the second air outlet 143, and the fresh air flows through the second air outlet 143 and the air outlet 112 in sequence. This usually means that the fresh air can be directly sent into the room without passing through the heat exchanger 12, thereby reducing the energy consumption of fresh air treatment and supplementing the room with fresh air to improve indoor air quality.

[0136] Continue to refer to Figure 13 After starting the fresh air conditioning unit 100, the control method also includes: Obtain the first temperature parameter T1 and the first humidity parameter RH1 of the environment within a preset time before the indoor unit 10 starts.

[0137] Calculate the first rate of change of the first temperature parameter T1 within a preset time, and calculate the second rate of change of the first humidity parameter RH1 within a preset time.

[0138] Determine whether the first and second rates of change are greater than the third threshold W3.

[0139] If at least one of the first and second change rates is greater than the third threshold W3, the fresh air cavity 14 is controlled to switch to the first fresh air state.

[0140] Otherwise, control the fresh air chamber 14 to switch to the second fresh air state.

[0141] The first temperature parameter T1 and the first humidity parameter RH1 of the environment where the indoor unit 10 is located are typically obtained through a first temperature sensor 152 and a first humidity sensor 153 located at the return air vent 111. These sensors convert the collected analog signals into digital signals and transmit them to the control module 151 for further processing.

[0142] The control module 151 calculates the first rate of change of the first temperature parameter T1 within a preset time period, and the second rate of change of the first humidity parameter RH1 within the same preset time period, aiming to assess the dynamic trend and rate of change of indoor environmental parameters. The control module 151 can periodically (e.g., every few seconds or tens of seconds) collect the first temperature parameter T1 and the first humidity parameter RH1 within a preset time period before the fresh air conditioner 100 starts. Then, by comparing the currently collected parameters with those collected previously (e.g., 30 seconds, 60 seconds, or longer), the changes in temperature and humidity are calculated, and then divided by time to obtain the corresponding rates of change, such as the first rate of change being a certain number of degrees per minute for temperature, and the second rate of change being a certain value per minute.

[0143] The system can calculate the average of ten first and second rates of change within a preset ten-minute timeframe. During the calculation, a maximum and a minimum value can be removed to mitigate random errors. Thus, by averaging the first and second rates of change, the system can effectively reflect short-term dynamic changes in the indoor environment.

[0144] The control module 151 determines whether the first and second rates of change exceed a third threshold W2. This determination is used to identify whether the indoor environment is experiencing significant and rapid temperature or humidity changes. The third threshold is a pre-set value representing the rate of temperature or humidity change that warrants attention. For example, the third threshold can be set to a temperature change rate greater than 0.5-1°C / minute, or a humidity change rate greater than 1%-2%RH / minute. The control module 151 compares the calculated first and second rates of change with the third threshold. If at least one of them exceeds its respective third threshold, the indoor environment is considered to be changing rapidly.

[0145] Rapidly changing indoor temperature or humidity indicates a significant difference between indoor and outdoor temperatures (or humidity). In such cases, it is not advisable to directly introduce outdoor fresh air into the room. The control module 151 can adjust the fresh air chamber 14 to the first fresh air state, allowing the heat exchanger 12 to adjust the temperature (or humidity) of the fresh air before mixing it with the indoor return air and discharging it into the room. This avoids large fluctuations in indoor temperature (or humidity) and maintains the indoor temperature (or humidity) within a suitable range. This enables the fresh air conditioner 100 to provide smarter, more energy-efficient, and more comfortable operation under various environmental conditions.

[0146] Conversely, if both the first and second rate of change are less than the third threshold W2, it indicates that the difference between indoor and outdoor temperature and humidity is small, and fresh air can be directly introduced into the room. For example, the control module 151 will control the fresh air cavity 14 to switch to the second fresh air state. In the second fresh air state, the fresh air inlet 141 is connected to the second air outlet 143, and the fresh air flows through the second air outlet 143 and the air outlet 112 in sequence. This usually means that the fresh air can be directly sent into the room without passing through the heat exchanger 12, thereby reducing the energy consumption of fresh air treatment and supplementing the room with fresh air to improve indoor air quality.

[0147] Thirdly, such as Figure 14 As shown in the figure, this application embodiment provides a control device for a fresh air conditioner, namely a control module 151. The control module includes a processor 1511, a communication interface 1512, a memory 1513, and a communication bus 1514. The processor 1511, communication interface 1512, and memory 1513 communicate with each other via the communication bus 1514. The memory 1513 is used to store computer programs.

[0148] In one embodiment of this application, when the processor 1511 executes the computer program stored in the memory 1513, it implements the execution steps of the fresh air conditioning manufacturing method in the second aspect.

[0149] This application also provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the execution steps of the fresh air conditioning manufacturing method in the second aspect.

[0150] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0151] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0152] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A fresh air conditioning system, characterized in that, Includes an indoor unit, which includes a casing, a heat exchanger, an indoor fan, and a fresh air chamber; The casing has a return air inlet and an air outlet, and the heat exchanger, the indoor fan, and the fresh air chamber are disposed inside the casing; the indoor fan is used to drive air to flow sequentially through the return air inlet, the heat exchanger, and the air outlet; The fresh air cavity is disposed inside the housing and has a fresh air inlet, a first air outlet, and a second air outlet. The fresh air inlet is used to supply fresh air. The fresh air cavity is configured to have a first fresh air state and a second fresh air state. When the fresh air cavity is switched to the first fresh air state, the fresh air inlet is connected to the first air outlet, so that fresh air flows through the first air outlet, the heat exchanger and the air outlet in sequence; When the fresh air cavity is switched to the second fresh air state, the fresh air inlet is at least connected to the second air outlet, so that the fresh air flows through the second air outlet and the air outlet in sequence.

2. The fresh air conditioner according to claim 1, characterized in that, The fresh air cavity includes: The fresh air cavity shell has an air guide cavity inside, and the fresh air cavity shell is provided with a fresh air inlet, a first air outlet and a second air outlet that communicate with the air guide cavity; A wind deflector, which is located inside the air guide cavity and rotatably connected to the fresh air cavity shell; And a drive motor, which is connected to the baffle plate and is used to drive the baffle plate to rotate in the air guide cavity; When the fresh air cavity is switched to the first fresh air state, the drive motor drives the baffle to rotate to the first preset position so that the fresh air inlet is connected to the first air outlet and the fresh air inlet is prevented from being connected to the second air outlet. When the fresh air cavity switches to the second fresh air state, the drive motor drives the baffle to rotate to the second preset position so that the fresh air inlet is at least connected to the second air outlet.

3. The fresh air conditioner according to claim 2, characterized in that, The fresh air cavity shell is provided with an air guide groove, and the first air outlet is disposed in the air guide groove; When the wind deflector is in the second preset position, the wind deflector blocks the air guide groove to prevent the fresh air inlet from communicating with the first air outlet; When the wind deflector is in the first preset position, the wind deflector is located between the air guide groove and the second air outlet.

4. The fresh air conditioner according to claim 2, characterized in that, The indoor unit also includes: A first temperature sensor is installed at the return air vent to detect a first temperature parameter; A first humidity sensor is installed at the return air vent to detect a first humidity parameter; The system includes a control module, and the first temperature sensor, the first humidity sensor, the indoor fan, and the drive motor are electrically connected to the control module.

5. The fresh air conditioner according to claim 4, characterized in that, The fresh air conditioning system also includes: The second temperature sensor is located at the outdoor unit and is electrically connected to the control module. The second temperature sensor is used to detect a second temperature parameter of the external environment. A second humidity sensor is installed at the outdoor unit and electrically connected to the control module. The second humidity sensor is used to detect a second humidity parameter of the external environment; and / or... A communication module, wherein the control module is electrically connected to the communication module, is used to acquire weather forecast parameters.

6. The fresh air conditioner according to any one of claims 1-5, characterized in that, The fresh air cavity extends along a first direction, which is the length direction of the air outlet. The number of first air vents is multiple, and these multiple first air vents are distributed at intervals along the first direction; the number of second air vents is multiple, and these multiple second air vents are distributed at intervals along the first direction; and / or, The diameter of the first air vent and the second air vent is 1.5-5mm; and / or, Along the direction of air flow, the first air vent has a larger diameter on the air outlet side, and the second air vent also has a larger diameter on the air outlet side.

7. The fresh air conditioner according to any one of claims 1-5, characterized in that, The fresh air cavity is disposed between the front side wall of the casing and the heat exchanger, with the first air outlet facing rearward and the second air outlet facing downward and connected to the air outlet.

8. The fresh air conditioner according to any one of claims 1-5, characterized in that, The indoor unit also includes an electrical box and a fresh air fan; Inside the housing, the electrical box and the fresh air fan are arranged on the same side of the heat exchanger along a first direction, and the electrical box and the fresh air fan are arranged sequentially along a third direction; The first direction is the length direction of the air outlet, and the third direction forms an angle with the first direction.

9. The fresh air conditioner according to claim 8, characterized in that, Along the first direction, the width of the electrical box is greater than or equal to the width of the fresh air fan.

10. A method for controlling a fresh air conditioning unit, used to control the fresh air conditioning unit as described in any one of claims 1-9, characterized in that, The control method includes: Start the fresh air conditioning unit; The system obtains the set temperature of the indoor unit and a first temperature parameter of the environment where the indoor unit is located, and obtains a second temperature parameter and a second humidity parameter of the outdoor environment. Determine the relationship between the first humidity parameter and the first threshold and the second threshold, wherein the first threshold is less than the second threshold; If the first humidity parameter is less than the first threshold, control the fresh air cavity to switch to the second fresh air state; If the first humidity parameter is greater than the second threshold, the fresh air cavity is controlled to switch to the first fresh air state.

11. The control method for a fresh air conditioning system according to claim 10, characterized in that, After the step of determining the relationship between the first humidity parameter and the first and second thresholds, the control method includes: If the first humidity parameter is greater than or equal to the first threshold and less than or equal to the second threshold; The outdoor dew point temperature T is calculated using the formula T=T2-(100-RH2) / 5; where T2 is the second temperature parameter and RH2 is the second humidity parameter. Determine whether the set temperature of the indoor unit is greater than the dew point temperature; If the set temperature is greater than the dew point temperature, control the fresh air cavity to switch to the second fresh air state; If the set temperature is less than or equal to the dew point temperature, the fresh air chamber is controlled to switch to the first fresh air state.

12. The control method for a fresh air conditioning system according to claim 10 or 11, characterized in that, When the fresh air conditioner includes a communication module for acquiring weather forecast parameters, the control method further includes the following after the step of starting the fresh air conditioner: Obtain local weather forecast parameters and the set temperature; the weather forecast parameters include weather type, air humidity, and air dew point temperature; Determine whether the preset conditions are met; If the weather type is rainy or snowy, and at least one of the following conditions is met: the air humidity is greater than the second threshold and the set temperature is lower than the dew point temperature, then the preset condition is satisfied; control the fresh air cavity to switch to the first fresh air state; Otherwise, control the fresh air cavity to switch to the second fresh air state.

13. The control method for a fresh air conditioning system according to claim 10 or 11, characterized in that, After the step of starting the fresh air conditioner, the control method further includes: Obtain the first temperature parameter and the first humidity parameter of the environment within a preset time before the indoor unit starts; Calculate the first rate of change of the first temperature parameter within a preset time, and calculate the second rate of change of the first humidity parameter within the preset time. Determine whether the first rate of change and the second rate of change are greater than a third threshold; If at least one of the first rate of change and the second rate of change is greater than the third threshold, the fresh air cavity is controlled to switch to the first fresh air state. Otherwise, control the fresh air cavity to switch to the second fresh air state.

Images