Fresh air conditioner, control method thereof and air conditioner

Abstract

The application provides a fresh air conditioner and a control method thereof and an air conditioner, relates to the technical field of air conditioners, and improves the problem of indoor temperature fluctuation caused by the introduction of fresh air in the prior art. The fresh air conditioner comprises: a refrigerant circulation loop, the refrigerant circulation loop comprising a first throttling device, a second throttling device and a fresh air heat exchanger, the first throttling device being in communication with the second throttling device through the fresh air heat exchanger, and the fresh air heat exchanger being located between the first throttling device and the second throttling device; and an air conditioner indoor unit, the air conditioner indoor unit having an air conditioner air duct and a fresh air duct, the fresh air duct being in communication with the air conditioner air duct or the fresh air duct being in communication with an indoor space, and the fresh air heat exchanger being located in the fresh air duct.

Description

Technical Field

[0001] This application relates to the field of air conditioning technology, and in particular to fresh air conditioning systems and their control methods, and air conditioners. Background Technology

[0002] With economic development, people have increasingly higher demands for comfort when using air conditioning. However, once the air conditioner is turned on, the indoor air quality deteriorates due to the enclosed space. To address this, air conditioners with fresh air intake systems have emerged. These systems operate in cooling or heating mode while simultaneously drawing in fresh air from outside, improving indoor air quality.

[0003] However, there are some problems with fresh air conditioning systems that draw air from the outside into the room. For example, due to the temperature difference between indoors and outdoors, the introduction of outdoor air will affect the indoor temperature, causing fluctuations and impacting the comfort of the indoor environment. Summary of the Invention

[0004] In view of this, this application provides a fresh air conditioner and its control method, and an air conditioner, to improve the problem of indoor temperature fluctuation caused by the introduction of fresh air.

[0005] In a first aspect, this application provides a control method for a fresh air conditioning unit, the fresh air conditioning unit including a refrigerant circulation loop and an indoor unit, the refrigerant circulation loop including a first throttling device, a second throttling device, and a fresh air heat exchanger, the fresh air heat exchanger being located between the first throttling device and the second throttling device; the indoor unit having an air conditioning duct and a fresh air duct, the fresh air duct having a fresh air fan, and the fresh air heat exchanger being located within the fresh air duct, the fresh air duct having a fresh air outlet at one end and communicating with the air conditioning duct through the fresh air outlet, the air conditioning duct having an air conditioning outlet located at the end of the air conditioning duct furthest from the fresh air outlet; the control method includes:

[0006] When it is determined that the fresh air function of the fresh air conditioner is turned on and is in the fresh air introduction mode, the current air conditioner operation mode and the temperature difference between the fresh air outlet temperature and the air conditioner outlet temperature are obtained. The air conditioner operation mode includes cooling mode and heating mode.

[0007] Based on the temperature difference, the current air conditioning operating mode, and the preset correspondence table, the opening degree of the first throttling device and the second throttling device, as well as the current adjustment strategy of the fresh air fan speed, are determined. The preset correspondence table includes the correspondence between the temperature difference between the fresh air outlet and the air conditioning outlet, the air conditioning operating mode, the opening degree of the first throttling device and the second throttling device, and the adjustment strategy of the fresh air fan speed.

[0008] Based on the current adjustment strategy, the opening degree of the first throttling device, the opening degree of the second throttling device, and the speed of the fresh air fan are adjusted.

[0009] In some embodiments of this application, the preset correspondence table includes:

[0010] If the air conditioner is in heating mode and the temperature difference is greater than the first preset temperature difference, then the fresh air fan is controlled to maintain a constant speed.

[0011] If the air conditioner is in heating mode and the temperature difference is less than or equal to the first preset temperature difference, then the speed of the fresh air fan is reduced.

[0012] If the air conditioner is in cooling mode and the temperature difference is greater than the second preset temperature difference and less than the third preset temperature difference, then the fresh air fan is controlled to maintain its current speed.

[0013] If the air conditioner is in cooling mode and the temperature difference is less than or equal to the second preset temperature difference, then the fresh air fan is controlled to maintain its current speed, and the opening of the first throttling device is increased while the opening of the second throttling device is decreased.

[0014] If the air conditioner is in cooling mode and the temperature difference is greater than or equal to the third preset temperature difference, then the speed of the fresh air fan will be reduced.

[0015] In some embodiments of this application, before determining the current adjustment strategy, the control method further includes:

[0016] Adjust the opening of the second throttling device to the maximum opening, and adjust the opening of the first throttling device so that the refrigerant circulation loop is throttled by the first throttling device.

[0017] In some embodiments of this application, the fresh air duct has an exhaust gas inlet at one end and an air inlet / outlet at the other end. The exhaust gas inlet is located between the fresh air outlet and the air inlet / outlet. The fresh air fan is positioned close to the air inlet / outlet. A switching element is provided within the fresh air duct for switching the opening of the fresh air outlet or the exhaust gas inlet. The control method further includes:

[0018] When it is determined that the switching component blocks the exhaust gas inlet and the fresh air fan is turned on and rotating in the forward direction, it is determined that the fresh air function of the fresh air air conditioner is turned on and is in the fresh air introduction mode.

[0019] In some embodiments of this application, the method further includes:

[0020] When it is determined that the fresh air function of the fresh air conditioner is turned on and in exhaust mode, the opening of the first throttling device is adjusted to the maximum opening, and the opening of the second throttling device is adjusted so that the refrigerant circulation loop is throttled through the second throttling device.

[0021] In some embodiments of this application, the fresh air duct has an exhaust gas inlet at one end and an air inlet / outlet at the other end. The exhaust gas inlet is located between the fresh air outlet and the air inlet / outlet. The fresh air fan is positioned close to the air inlet / outlet. A switching element is provided within the fresh air duct to block either the fresh air outlet or the exhaust gas inlet, thereby switching the connection between the fresh air duct and the air conditioning duct or its direct connection with the indoor space. The control method further includes:

[0022] When it is determined that the switching component blocks the fresh air outlet and the fresh air fan is turned on and in reverse, it is determined that the fresh air function of the fresh air air conditioner is turned on and in exhaust gas discharge mode.

[0023] Secondly, this application provides a fresh air conditioning system, which includes:

[0024] A refrigerant circulation loop, the refrigerant circulation loop including a first throttling device, a second throttling device and a fresh air heat exchanger, the fresh air heat exchanger being located between the first throttling device and the second throttling device;

[0025] An air conditioning indoor unit has an air conditioning duct and a fresh air duct inside. The fresh air duct is connected to the air conditioning duct or to the indoor space, and the fresh air heat exchanger is located inside the fresh air duct.

[0026] In some embodiments of this application, the fresh air duct has a fresh air outlet and an exhaust gas inlet at one end, and an air inlet / outlet at the other end. The exhaust gas inlet and / or the fresh air outlet are connected to the air inlet / outlet. A fresh air fan is installed inside the fresh air duct, and the fresh air fan is located near the air inlet / outlet to draw outdoor air into the fresh air duct and discharge it through the fresh air outlet, or to draw indoor exhaust gas into the fresh air duct and discharge it through the air inlet / outlet.

[0027] In some embodiments of this application, the fresh air duct is provided with a switching component for selectively opening either the fresh air outlet or the exhaust gas inlet. When the exhaust gas inlet is open, it defines the exhaust duct. When the exhaust gas inlet is closed, the fresh air outlet is connected to the air conditioning duct.

[0028] Thirdly, this application provides an air conditioner, including a processor, a memory, a communication interface, and a communication bus. The processor is connected to the memory and the communication interface via the communication bus. The memory is used to store computer execution instructions. When the air conditioner is running, the processor executes the computer instructions stored in the memory to cause the air conditioner to perform the fresh air conditioning control method as described in the first aspect.

[0029] In summary, due to the adoption of the above technical solution, this application includes the following beneficial effects:

[0030] This application provides a fresh air conditioner and its control method, as well as an air conditioner. In some embodiments of this application, by adjusting the opening of the first throttling device and the second throttling device, the pressure of the refrigerant flowing through the fresh air heat exchanger is adjusted, thereby adjusting the temperature of the refrigerant. Since the fresh air heat exchanger is located inside the fresh air duct, the temperature change of the refrigerant is transmitted to the fresh air heat exchanger, and the fresh air entering the fresh air duct exchanges heat through the fresh air heat exchanger, thereby achieving the temperature regulation of the fresh air. The fresh air duct can also be connected to the air conditioning duct, so that the temperature-regulated fresh air is introduced into the air conditioning duct, mixed with the air in the air conditioning duct, and discharged into the room, reducing the impact of indoor temperature fluctuations caused by the temperature difference between the fresh air and the indoor temperature, and improving user comfort. Furthermore, the fresh air heat exchanger is located between the first throttling device and the second throttling device. Through the cooperation of the first and second throttling devices, the amount of refrigerant used for heat exchange between them can be adjusted, as well as the pressure of the refrigerant used for heat exchange can be changed, thereby changing the temperature of the refrigerant and adjusting the temperature of the fresh air. Through the second throttling device, the temperature of the refrigerant after heat exchange in the fresh air heat exchanger can be adjusted again, and the refrigerant can be prevented from entering the air conditioning duct too quickly, thus affecting the air directly entering the air conditioning unit and further preventing indoor temperature fluctuations.

[0031] By acquiring the current air conditioning operating mode and the temperature difference between the fresh air outlet temperature and the air conditioning outlet temperature, and based on the aforementioned acquired parameters, the current adjustment strategies for the opening degree of the first and second throttling devices and the speed of the fresh air fan are determined. This enables the adjustment of the refrigerant temperature and the fresh air velocity entering the air conditioning unit. Furthermore, based on the correspondence in the preset correspondence table, the temperature of the fresh air discharged into the room can be adjusted more accurately, thereby avoiding significant fluctuations in the indoor temperature caused by the introduction of fresh air. Attached Figure Description

[0032] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings of the embodiments will be briefly described below. Obviously, the drawings described below only relate to some embodiments of this application and are not intended to limit this application, wherein:

[0033] Figure 1 This is a schematic diagram of the structure of the fresh air conditioner provided in the embodiments of this application;

[0034] Figure 2 This is a schematic diagram of a fresh air conditioning structure in the fresh air introduction mode under the cooling mode provided in an embodiment of this application.

[0035] Figure 3 This is a schematic diagram of a fresh air conditioning structure in the heating mode and fresh air introduction mode provided in an embodiment of this application.

[0036] Figure 4 A schematic diagram of a fresh air conditioning system in exhaust gas mode under cooling mode, as provided in an embodiment of this application.

[0037] Figure 5 A schematic diagram of a fresh air conditioning system in exhaust mode during heating mode, provided in an embodiment of this application.

[0038] Figure 6 This is a schematic flowchart of the fresh air conditioning control method provided in the embodiments of this application.

[0039] Explanation of reference numerals in the attached figures:

[0040] 1. Refrigerant circulation loop; 11. First throttling device; 12. Second throttling device; 13. Fresh air heat exchanger; 14. Compressor; 15. Condenser; 16. Evaporator; 2. Indoor air conditioning unit; 21. Air conditioning duct; 211. Air conditioning outlet; 212. Air conditioning return air outlet; 213. Indoor fan; 22. Fresh air duct; 221. Fresh air outlet; 222. Exhaust gas inlet; 223. Air inlet / outlet; 23. Switching unit; 24. Fresh air fan. Detailed Implementation

[0041] The technical solutions of the embodiments of this application will be clearly and comprehensively described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and 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.

[0042] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or specifying the number of technical features indicated. Therefore, features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0043] In this application, the term "exemplary" is used to mean "serving as an example, illustration, or description." Any embodiment described as "exemplary" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to make and use this application. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that this application can be made without using these specific details. In other instances, known structures and processes are not described in detail to avoid obscuring the description of this application with unnecessary detail. Therefore, this application is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles disclosed in this application.

[0044] A common problem with current fresh air conditioners is that when the fresh air mode is turned on, and outdoor fresh air is introduced into the air conditioner and then discharged into the room, the difference between the outside temperature and the indoor temperature causes the fresh air to have a significant impact on the indoor temperature, resulting in fluctuations in the indoor temperature and affecting the user's comfort.

[0045] For this purpose, please see Figure 1 This application provides a fresh air conditioning system, which includes:

[0046] The refrigerant circulation loop 1 includes a first throttling device 11, a second throttling device 12, and a fresh air heat exchanger 13, with the fresh air heat exchanger 13 located between the first throttling device 11 and the second throttling device 12.

[0047] An air conditioning indoor unit 2 has an air conditioning duct 21 and a fresh air duct 22. The fresh air duct 22 is connected to the air conditioning duct 21 or to the indoor space, and the fresh air heat exchanger 13 is located in the fresh air duct 22.

[0048] The fresh air conditioning system provided in this application mainly utilizes the changes in the opening degree of the first throttling device 11 and the second throttling device 12 to control the pressure of the refrigerant flowing in the circulation pipeline, thereby changing the temperature of the refrigerant. The regulated refrigerant then flows through the fresh air heat exchanger 13, which is located inside the fresh air duct 22. This allows the fresh air flowing through the fresh air duct 22 to exchange heat with the fresh air heat exchanger 13, regulating the temperature of the fresh air so that it can be close to the current indoor temperature, reducing the impact of indoor temperature fluctuations caused by the entry of fresh air into the room.

[0049] It should be noted that the refrigerant circulation loop 1 also includes a compressor 14, a four-way valve, a condenser 15, and an evaporator 16; the indoor unit 2 of the air conditioner also has an air conditioning outlet 211, an air conditioning return air outlet 212, and an indoor fan 213. The air conditioning outlet 211 and the air conditioning return air outlet 212 are located at opposite ends of the air conditioning duct 21, and the indoor fan 213 is used to draw indoor air into the air conditioning duct 21. The compressor 14, four-way valve, condenser 15, first throttling device 11, fresh air heat exchanger 13, second throttling device 12, and evaporator 16 in the refrigerant circulation loop 1 are sequentially connected to form a closed circulation loop.

[0050] Based on the description of refrigerant circulation loop 1 above, it can be seen that the fresh air heat exchanger 13 is positioned between the first throttling device 11 and the second throttling device 12. Please refer to [link / reference needed]. Figure 2 When the air conditioner is in cooling mode, the refrigerant originates from the compressor 14 and passes sequentially through the first throttling device 11, the fresh air heat exchanger 13, the second throttling device 12, and the evaporator 16. That is, when it is necessary to adjust the fresh air temperature, the opening of the first throttling device 11 can be changed, altering the temperature of the refrigerant flowing through the fresh air heat exchanger 13 and the amount of refrigerant flowing through it per unit time, thus exchanging heat with the fresh air and achieving temperature regulation. To prevent this refrigerant temperature from affecting the temperature of the subsequent air outlet air, the opening of the second throttling device 12 can be adjusted to the temperature required for cooling mode before passing through the evaporator 16 for heat exchange, unaffected by the change in refrigerant temperature caused by adjusting the fresh air. Similarly, please refer to [link to other documentation]. Figure 3 When the air conditioner is in heating mode, the refrigerant starts from the compressor 14 and passes through the evaporator 16, the second throttling device 12, the fresh air heat exchanger 13, and the first throttling device 11 in sequence. That is, the opening degree of the second throttling device 12 can be changed to control the fresh air temperature, and the opening degree of the first throttling device 11 can be changed to restore the refrigerant temperature to the temperature required for heating. The heat exchange through the evaporator 16 is not affected by the change in refrigerant temperature due to the adjustment of the fresh air.

[0051] In some embodiments, the fresh air duct 22 has a fresh air outlet 221 and an exhaust gas inlet 222 at one end, and an air inlet / outlet 223 at the other end. The exhaust gas inlet 222 and / or the fresh air outlet 221 are connected to the air inlet / outlet 223. Specifically, the exhaust gas inlet 222 is located between the fresh air outlet 221 and the air inlet / outlet 223, that is, the fresh air outlet 221 and the air inlet / outlet 223 are located at opposite ends of the fresh air duct 22, while the exhaust gas inlet 222 is located somewhere between the two ends of the fresh air duct 22. As long as the exhaust gas inlet 222 can communicate with the indoor space, the exhaust gas in the indoor space can enter the fresh air duct 22 through the exhaust gas inlet 222, and the specific location of the exhaust gas inlet 222 is not otherwise limited. A fresh air fan 24 is installed in the fresh air duct 22. The fresh air fan 24 is located near the air inlet 223 and between the air inlet 223 and the exhaust gas inlet 222. It is used to draw outdoor air into the fresh air duct 22 and discharge it through the fresh air outlet 221, or to draw indoor exhaust gas into the fresh air duct 22 and discharge it through the air inlet 223.

[0052] By establishing a fresh air outlet 221 and an exhaust gas inlet 222 on the fresh air duct 22, and having them share a single duct, the fresh air conditioning system can both introduce outside air into the room and exhaust indoor exhaust gas to the outside. Compared to existing fresh air conditioning systems, it offers more diverse functions and provides a certain auxiliary effect in purifying indoor air. Furthermore, structurally, the exhaust gas to the outside and the fresh air to the inside both share the same duct, reducing the number of ducts and fans required, lowering costs, and resulting in a more compact structure.

[0053] In some embodiments, a switching element 23 is provided within the fresh air duct 22 to block either the fresh air outlet 221 or the exhaust gas inlet 222, allowing selective opening of either the fresh air outlet 221 or the exhaust gas inlet 222. When the exhaust gas inlet is open, an exhaust duct is defined, specifically the duct formed by the exhaust gas inlet 222 being open and connected to the air inlet / outlet 223 via the fresh air duct 22. This exhaust duct allows exhaust gas in the indoor space to be discharged through the air inlet / outlet 223; when the exhaust gas inlet 222 is closed, the fresh air outlet 221 is connected to the air conditioning duct 21. The switching element 23 can be a valve, a rotatable baffle, etc., and its specific structure is not limited. To facilitate understanding how the switching element 23 switches between the fresh air outlet 221 and the exhaust gas inlet 222, its structure is illustrated below:

[0054] The switching component 23 includes a hinge and a baffle. The hinge is located at a point on the duct wall of the fresh air duct 22. The baffle is connected to the hinge and can rotate around the hinge as a pivot. When the baffle rotates to the first position, it closes the exhaust gas inlet 222 and opens the fresh air outlet 221. When the baffle rotates to the second position, it opens the exhaust gas inlet 222 and closes the fresh air outlet 221. The first position can be located at the exhaust gas inlet 222; the second position can be located at the fresh air outlet 221.

[0055] Please see Figure 6 This application also proposes a control method for a fresh air conditioning system, applied to the aforementioned fresh air conditioning system. The method includes the following steps.

[0056] Step S1: When it is determined that the fresh air function of the air conditioner is turned on and in fresh air introduction mode, obtain the current air conditioner operating mode and the temperature difference between the fresh air outlet 221 and the air conditioner outlet 211. The air conditioner operating modes include cooling mode and heating mode.

[0057] Step S2: Based on the temperature difference, the current air conditioning operating mode, and the preset correspondence table, determine the opening degree of the first throttling device 11 and the second throttling device 12, as well as the current adjustment strategy of the fresh air fan speed 24. The preset correspondence table includes the correspondence between the temperature difference between the fresh air outlet 221 and the air conditioning outlet 211, the air conditioning operating mode, the opening degree of the first throttling device 11 and the second throttling device 12, and the adjustment strategy of the fresh air fan speed 24.

[0058] Step S3: Adjust the speed of the first throttling device 11, the second throttling device 12, and the fresh air fan 24 accordingly based on the current adjustment strategy.

[0059] The temperatures at both the air conditioner outlet 211 and the fresh air outlet 221 are detected by temperature sensors. Other temperature sensing components can also be used; no specific limitation is made. The temperature sensor for detecting the air conditioner outlet 211 is mounted on the casing wall of the indoor unit 2, close to the outlet 211. The temperature sensor for detecting the fresh air outlet 221 is mounted on the duct wall of the fresh air duct 22, close to the outlet 221.

[0060] By obtaining the temperature difference between the fresh air outlet 221 and the air conditioner outlet 211, we can know how much the current outdoor fresh air temperature differs from the air temperature at the air conditioner outlet 211. The difference is compared with the preset difference range in the preset correspondence table. Based on the comparison result, the adjustment strategy corresponding to the comparison result is selected to adjust the fresh air temperature.

[0061] In some embodiments, the preset correspondence table specifically includes:

[0062] If the air conditioner is currently in heating mode and the temperature difference is greater than the first preset temperature difference in the preset table, the current forward rotation speed of the fresh air fan 24 will remain unchanged. Here, the temperature difference refers to the difference between the temperature at the fresh air outlet 221 and the temperature at the air conditioner outlet 211. The first preset temperature difference ranges from -5 to 0℃. This range can fluctuate slightly, for example, due to different climates in the south and north, so it is not a limitation on the system. If the temperature difference is greater than the first preset temperature difference in the preset table, it means that the temperature at the fresh air outlet 221 is close to or higher than the temperature at the air conditioner outlet 211. To ensure sufficient fresh air input, there is no need to reduce the current forward rotation speed of the fresh air fan 24.

[0063] If the air conditioner is currently in heating mode and the temperature difference is less than or equal to the first preset temperature difference in the preset table, the speed of the fresh air fan 24 will be reduced. If the temperature difference is less than or equal to the first preset temperature difference, it means that the temperature of the fresh air outlet 221 is too low. The speed of the fresh air fan 24 needs to be reduced to slow down the speed of the fresh air passing through the fresh air duct 22, so that the fresh air can exchange heat with the fresh air heat exchanger 13 more fully and increase the temperature of the fresh air.

[0064] If the air conditioner is currently in cooling mode, and the temperature difference is greater than the second preset temperature difference in the preset table but less than the third preset temperature difference, then the forward rotation speed of the fresh air fan 24 will remain unchanged. Here, the temperature difference being greater than the second preset temperature difference in the preset table but less than the third preset temperature difference indicates that the temperature at the fresh air outlet 221 is relatively close to the temperature at the air conditioner outlet 211, and the temperature of the fresh air entering the indoor space is suitable, so there is no need to reduce the reverse rotation speed of the fresh air fan 24.

[0065] Specifically, the range of the second preset temperature difference is -3 to -10℃; the range of the third preset temperature difference is 3 to 10℃. Similarly, like the first preset temperature difference, the ranges of the second and third preset temperature differences can fluctuate to some extent. This is not a limitation on the numerical value of the temperature difference; it is only for illustrative purposes.

[0066] If the air conditioner is currently in cooling mode and the temperature difference is less than or equal to the second preset temperature difference, the speed of the fresh air fan 24 is kept constant, and the opening of the first throttling device 11 is increased while the opening of the second throttling device 12 is decreased. Here, the temperature difference being less than or equal to the second preset temperature difference indicates that the temperature of the fresh air outlet 221 is much lower than the temperature of the air conditioner outlet 211. To avoid condensation, the opening of the first throttling device 11 needs to be increased, thereby increasing the pressure of the fresh air heat exchanger 13 and thus increasing the fresh air temperature in the fresh air duct 22. Furthermore, when the opening of the first throttling device 11 is increased, the opening of the second throttling device 12 is simultaneously decreased to avoid affecting the air temperature of the air conditioning duct 21 due to the increase in the opening of the first throttling device 11, and to ensure that the outlet air temperature of the air conditioning duct 21 remains constant or changes only slightly.

[0067] If the air conditioner is currently in cooling mode and the temperature difference is greater than or equal to the third preset temperature difference, the rotation speed of the fresh air fan 24 will be reduced. Here, a temperature difference greater than or equal to the third preset temperature difference indicates that the temperature of the fresh air at the fresh air outlet 221 is too high compared to the temperature at the air conditioner outlet 211. Therefore, the rotation speed of the fresh air fan 24 needs to be reduced to allow the fresh air entering the fresh air duct 22 to more fully exchange heat with the fresh air heat exchanger 13, thereby lowering the temperature of the fresh air.

[0068] In some embodiments, before determining the current adjustment strategy, the control method further includes:

[0069] The opening of the second throttling device 12 is adjusted to its maximum, and the opening of the first throttling device 11 is also adjusted, causing the refrigerant circulation loop 1 to be throttled through the first throttling device 11. Here, when the air conditioner is operating normally in cooling or heating mode, the opening of the first throttling device 11 is adjusted to regulate the refrigerant temperature, thereby achieving the corresponding cooling or heating function. When the opening of the second throttling device 12 is adjusted to its maximum, it has no throttling effect and only serves to connect the circulation pipes. The specific adjustment of the opening of the first throttling device 11 depends on the current cooling or heating mode and the user-set air conditioner temperature, and can refer to existing technologies; therefore, no specific limitations are made here.

[0070] In some embodiments, the fresh air duct 22 has an exhaust gas inlet 222 at one end and an air outlet 223 at the other end. The exhaust gas inlet 222 is located between the fresh air outlet 221 and the air outlet 223. The fresh air fan 24 is located close to the air outlet 223. The fresh air duct 22 is provided with a switching element 23 for blocking the fresh air outlet 221 or the exhaust gas inlet 222, thereby switching the connection between the fresh air duct 22 and the air conditioning duct 21 or the direct connection between the fresh air duct 22 and the indoor space. The control method further includes:

[0071] When it is determined that the switching element 23 blocks the exhaust gas inlet 222 and the fresh air fan 24 is turned on and in forward rotation, it is determined that the fresh air function of the fresh air air conditioner is turned on and in the fresh air introduction mode.

[0072] In some embodiments, please also refer to Figure 4 and Figure 5 The control methods also include:

[0073] When the fresh air function of the air conditioner is activated and in exhaust mode, the opening of the first throttling device 11 is adjusted to its maximum, and the opening of the second throttling device 12 is adjusted to throttle the refrigerant circulation loop 1 through the second throttling device 12. Here, even if the first throttling device 11 does not throttle, the pressure on the refrigerant remains unchanged, consequently its temperature remains unchanged, and the amount of refrigerant flowing through the fresh air heat exchanger 13 per unit time also remains unchanged. Meanwhile, the second throttling device 12 performs the throttling function, allowing the fresh air heat exchanger 13 to recover heat or cold from the exhaust gas, reducing energy waste. For ease of understanding, the process principle is explained in detail below:

[0074] Please see Figure 4 When the air conditioner is in cooling mode and the fresh air function is in exhaust mode: the refrigerant will pass through the first throttling device 11, the fresh air heat exchanger 13, and the second throttling device 12 in sequence. Here, the first throttling device 11 has no throttling effect, and the refrigerant temperature and flow rate will not change. When the refrigerant reaches the fresh air heat exchanger 13, the second throttling device 12 plays a throttling role, controlling the speed at which the refrigerant leaves the fresh air heat exchanger 13 (that is, it is equivalent to prolonging the time that the refrigerant stays in the fresh air heat exchanger 13), so that the exhaust gas can exchange heat with the fresh air heat exchanger 13 more fully and realize the recovery of cold energy.

[0075] Please see Figure 5 When the air conditioner is in heating mode and the fresh air function is in exhaust mode, the refrigerant will pass through the second throttling device 12, the fresh air heat exchanger 13, and the first throttling device 11 in sequence. Here, the second throttling device 12 plays a throttling role, and the refrigerant temperature changes, so that the exhaust gas will exchange heat with the fresh air heat exchanger 13. It can also reduce the refrigerant flow rate, so that the exhaust gas can exchange heat more fully at the fresh air heat exchanger 13 and realize heat recovery.

[0076] In some embodiments, the fresh air duct 22 has an exhaust gas inlet 222 at one end and an air outlet 223 at the other end. The exhaust gas inlet 222 is located between the fresh air outlet 221 and the air outlet 223. The fresh air fan 24 is located close to the air outlet 223. The fresh air duct 22 is provided with a switching element 23 for blocking the fresh air outlet 221 or the exhaust gas inlet 222, thereby switching the connection between the fresh air duct 22 and the air conditioning duct 21 or the direct connection between the fresh air duct 22 and the indoor space. The control method further includes:

[0077] When it is determined that the switching element 23 blocks the fresh air outlet 221 and the fresh air fan 24 is turned on and in reverse, it is determined that the fresh air function of the fresh air air conditioner is turned on and in exhaust mode.

[0078] This application also provides an air conditioner, including a processor, a memory, a communication interface, and a communication bus. The processor is connected to the memory and the communication interface via the communication bus. The memory is used to store computer execution instructions. When the air conditioner is running, the processor executes the computer instructions stored in the memory to make the air conditioner perform the fresh air conditioning control method as described in any of the previous embodiments.

[0079] This application also provides a storage medium including computer-executable instructions that, when executed on an air conditioner, cause the air conditioner to perform the fresh air conditioning control method as described in any of the preceding embodiments.

[0080] The basic concepts have been described above. Obviously, for those skilled in the art, the detailed disclosure above is merely illustrative and does not constitute a limitation of this application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements, and corrections to this application. Such modifications, improvements, and corrections are suggested in this application, and therefore remain within the spirit and scope of the exemplary embodiments of this application.

[0081] Furthermore, this application uses specific terms to describe embodiments of the application. For example, "an embodiment," "one embodiment," and / or "some embodiments" refer to a particular feature, structure, or characteristic associated with at least one embodiment of the application. Therefore, it should be emphasized and noted that "an embodiment," "one embodiment," or "an alternative embodiment" mentioned twice or more in different locations in this specification do not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of the application can be appropriately combined.

[0082] Similarly, it should be noted that, in order to simplify the description of the present application and thus aid in the understanding of one or more embodiments, the foregoing description of the embodiments of the present application sometimes combines multiple features into a single embodiment, drawing, or description thereof. However, this disclosure method does not imply that the subject matter of the present application requires more features than those mentioned in the claims. In fact, the embodiments contain fewer features than all the features of the single embodiments disclosed above.

[0083] In some embodiments, numbers describing the quantity of components and attributes are used. It should be understood that such numbers used in the description of embodiments are modified in some examples with the terms "approximately," "approximately," or "generally." Unless otherwise stated, "approximately," "approximately," or "generally" indicates that the numbers are allowed to vary by ±%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximate values, which may be changed depending on the characteristics required by individual embodiments. In some embodiments, numerical parameters should take into account specified significant digits and employ a general method of digit reservation. Although the numerical ranges and parameters used to confirm their breadth of range in some embodiments of this application are approximate values, in specific embodiments, such numerical values ​​are set as precisely as feasible.

[0084] For each patent, patent application, patent application publication, and other material such as articles, books, specifications, publications, and documents referenced in this application, the entire contents of that patent application are incorporated herein by reference, except for historical application documents that are inconsistent with or conflict with the content of this application, and documents that limit the broadest scope of the claims of this application (currently or subsequently appended to this application). It should be noted that if there are any inconsistencies or conflicts between the descriptions, definitions, and / or terminology used in the supplementary materials of this application and the content of this application, the descriptions, definitions, and / or terminology used in this application shall prevail.

Claims

1. A method for controlling a fresh air conditioning system, characterized in that, The fresh air air conditioner includes a refrigerant circulation loop and an indoor unit. The refrigerant circulation loop includes a first throttling device, a second throttling device, and a fresh air heat exchanger. The fresh air heat exchanger is located between the first throttling device and the second throttling device. The indoor unit has an air conditioning duct and a fresh air duct. A fresh air fan is installed in the fresh air duct, and the fresh air heat exchanger is located in the fresh air duct. One end of the fresh air duct has a fresh air outlet, which is connected to the air conditioning duct. One end of the air conditioning duct has an air conditioning outlet, which allows temperature-regulated fresh air to be introduced into the air conditioning duct, mixed with the air in the air conditioning duct, and then discharged into the room. The control method includes: When it is determined that the fresh air function of the fresh air conditioner is turned on and is in the fresh air introduction mode, the current air conditioner operation mode and the temperature difference between the fresh air outlet temperature and the air conditioner outlet temperature are obtained. The air conditioner operation mode includes cooling mode and heating mode. Based on the temperature difference, the current air conditioning operating mode, and the preset correspondence table, the current adjustment strategy for the opening degree of the first throttling device and the second throttling device, as well as the speed of the fresh air fan, is determined. The preset correspondence table includes the correspondence between the temperature difference between the fresh air outlet and the air conditioning outlet, the air conditioning operating mode, the opening degree of the first throttling device and the second throttling device, and the adjustment strategy for the speed of the fresh air fan. Based on the current adjustment strategy, the speeds of the first throttling device, the second throttling device, and the fresh air fan are adjusted accordingly.

2. The control method for a fresh air conditioning system according to claim 1, characterized in that, The preset correspondence table includes: If the air conditioner is currently in heating mode and the temperature difference is greater than the first preset temperature difference in the preset correspondence table, then the fresh air fan is controlled to maintain its current speed. If the air conditioner is currently in heating mode, and the temperature difference is less than or equal to the first preset temperature difference in the preset correspondence table, then the forward rotation speed of the fresh air fan is reduced. If the air conditioner is currently in cooling mode, and the temperature difference is greater than the second preset temperature difference but less than the third preset temperature difference in the preset correspondence table, then the fresh air fan is controlled to maintain its current speed. If the air conditioner is currently in cooling mode, and the temperature difference is less than or equal to the second preset temperature difference, then the fresh air fan is controlled to maintain its current speed, and the opening of the first throttling device is increased while the opening of the second throttling device is decreased. If the air conditioner is currently in cooling mode, and the temperature difference is greater than or equal to the third preset temperature difference, then the forward rotation speed of the fresh air fan is reduced.

3. The control method for a fresh air conditioning system according to claim 1, characterized in that, Before determining the current adjustment strategy, the control methods also include: Adjust the opening of the second throttling device to the maximum opening, and adjust the opening of the first throttling device so that the refrigerant circulation loop is throttled by the first throttling device.

4. The control method for a fresh air conditioning system according to claim 1, characterized in that, The fresh air duct has an exhaust gas inlet at one end and an air inlet / outlet at the other end. The exhaust gas inlet is located between the fresh air outlet and the air inlet / outlet. The fresh air fan is positioned close to the air inlet / outlet. A switching element is provided within the fresh air duct to block either the fresh air outlet or the exhaust gas inlet, thereby switching the connection between the fresh air duct and the air conditioning duct or directly to the indoor space. The control method further includes: When it is determined that the switching component blocks the exhaust gas inlet and the fresh air fan is turned on and rotating in the forward direction, it is determined that the fresh air function of the fresh air air conditioner is turned on and is in the fresh air introduction mode.

5. The control method for a fresh air conditioning system according to claim 1, characterized in that, The method further includes: When it is determined that the fresh air function of the fresh air conditioner is turned on and in exhaust mode, the opening of the first throttling device is adjusted to the maximum opening, and the opening of the second throttling device is adjusted so that the refrigerant circulation loop is throttled through the second throttling device.

6. The control method for a fresh air conditioning system according to claim 5, characterized in that, The fresh air duct has an exhaust gas inlet at one end and an air inlet / outlet at the other end. The exhaust gas inlet is located between the fresh air outlet and the air inlet / outlet. The fresh air fan is positioned close to the air inlet / outlet. A switching element is provided within the fresh air duct to block either the fresh air outlet or the exhaust gas inlet, thereby switching the connection between the fresh air duct and the air conditioning duct or directly to the indoor space. The control method further includes: When it is determined that the switching component blocks the fresh air outlet and the fresh air fan is turned on and in reverse, it is determined that the fresh air function of the fresh air air conditioner is turned on and in exhaust gas discharge mode.

7. An air conditioner, characterized in that, The system includes a processor, a memory, a communication interface, and a communication bus. The processor is connected to the memory and the communication interface via the communication bus. The memory is used to store computer execution instructions. When the air conditioner is running, the processor executes the computer execution instructions stored in the memory to cause the air conditioner to perform the control method of the fresh air conditioner as described in any one of claims 1-6.

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