Fresh air equipment, multi-connected air conditioning system and air supply method

Abstract

This invention discloses a fresh air device, a multi-split air conditioning system, and an air supply method. The fresh air device includes: a housing; a first air inlet; a first valve assembly for opening or closing the first air inlet; a second air inlet; a first air inlet channel connected to the first air inlet; a second air inlet channel connected to the second air inlet; an air outlet; an air outlet channel connected to the air outlet; a first fan component for drawing air from the first air inlet channel and supplying air to the air outlet channel; a second fan component for drawing air from the second air inlet channel and supplying air to the air outlet channel; and a connecting valve assembly connected between the first air inlet channel and the second air inlet channel for connecting or disconnecting the first air inlet channel and the second air inlet channel. One of the first air inlet and the second air inlet is a fresh air inlet for inputting fresh air, and the other is a return air inlet for inputting return air.

Description

Technical Field

[0001] This invention relates to the field of fresh air supply equipment technology, and particularly to a fresh air equipment, a multi-split air conditioning system, and an air supply method. Background Technology

[0002] Fresh air systems typically include a housing, fresh air inlets, return air inlets, filter components, heat exchangers such as evaporators and condensers, and one or more fan components. In practical applications, fresh air systems are used to introduce outdoor fresh air into a room, or to deliver indoor return air into a room after self-cleaning treatment, in order to improve indoor air quality and regulate temperature and humidity. Summary of the Invention

[0003] The purpose of this invention is to provide a fresh air device, a multi-split air conditioning system, and a method for supplying air to achieve ordinary or rapid extraction of fresh or return air.

[0004] The first aspect of this invention discloses a fresh air device, comprising:

[0005] case;

[0006] The first air inlet is located on the housing;

[0007] The first valve assembly is used to open or close the first air inlet;

[0008] The second air inlet is located on the housing;

[0009] The first air inlet channel is located inside the housing and is connected to the first air inlet.

[0010] The second air inlet channel is located inside the housing and is connected to the second air inlet.

[0011] The air outlet is located on the housing.

[0012] An air outlet duct is located inside the housing and connected to the air outlet.

[0013] The first fan component includes a first fan component inlet connected to the first air inlet channel and a first fan component outlet connected to the air outlet channel, for drawing air from the first air inlet channel and supplying air to the air outlet channel;

[0014] The second fan component includes a second fan component inlet connected to the second air inlet channel and a second fan component outlet connected to the air outlet channel, for drawing air from the second air inlet channel and supplying air to the air outlet channel;

[0015] A connecting valve assembly is connected between the first air inlet channel and the second air inlet channel to connect or disconnect the first air inlet channel and the second air inlet channel. One of the first air inlet and the second air inlet is a fresh air inlet for introducing fresh air, and the other is a return air inlet for introducing return air.

[0016] The fresh air device in this embodiment can achieve multiple air supply modes by connecting or disconnecting the first and second air intake channels through a connecting valve assembly. When the first and second air intake channels are disconnected, independent fresh air extraction and supply modes and independent return air extraction and supply modes can be achieved. When the first and second air intake channels are connected, the first and second fan components can be used to simultaneously extract and supply fresh air or return air to achieve a strong return air mode (or a strong fresh air mode). This allows for flexible switching according to indoor air quality and temperature and humidity requirements. It can meet daily energy-saving operation by disconnecting the first and second air intake channels, and provide a strong air volume by connecting the first and second air intake channels when rapid purification or dehumidification is needed.

[0017] In some embodiments, a first heat exchanger and a second heat exchanger are provided in the air outlet duct, wherein the first heat exchanger is used to cool and dehumidify the passing air, and the second heat exchanger is used to heat up the cooled and dehumidified air.

[0018] This embodiment can cool, dehumidify, and heat the air in the air outlet duct, reheating the dehumidified cold air to a comfortable temperature, avoiding excessively cold air supply, and achieving constant temperature dehumidification function. That is, the outlet air temperature is basically the same as the inlet air temperature, but the humidity is significantly reduced, improving the user's comfort experience.

[0019] In some embodiments, a first filter screen disposed within the air outlet channel is further included, the first filter screen being used to filter the air passing through the air outlet channel.

[0020] In this embodiment, the air supplied to the air outlet duct is purified by passing through a first filter to ensure that the air supplied to the room is clean, thereby improving the quality of the supplied air, realizing the purification function, and meeting the user's demand for healthy air.

[0021] In some embodiments, the device further includes a first temperature and humidity sensor disposed in the first air inlet channel and located between the first fan component and the first air inlet, a second temperature and humidity sensor disposed in the second air inlet channel and located between the second fan component and the second air inlet, and / or a third temperature and humidity sensor located between the second heat exchanger and the air outlet.

[0022] This embodiment monitors the temperature and humidity on the air inlet and outlet sides in real time, and can automatically adjust the working state of the first and second heat exchangers according to preset targets. For example, the temperature of the first and second heat exchangers can be adjusted by adjusting the compressor frequency and expansion valve opening of the refrigeration cycle system, and the speed of the first and second fan components can be adjusted to achieve precise temperature and humidity control. This realizes intelligent temperature and humidity regulation function, and the regulation is more accurate and reliable.

[0023] In some embodiments, the first air inlet and the second air inlet are respectively a fresh air inlet and a return air inlet, and the fresh air device further includes a second valve assembly, which is used to open or close the second air inlet.

[0024] In this embodiment, both the fresh air inlet and the return air inlet are equipped with independent valve assemblies, which can independently control the opening and closing of the fresh air inlet and the return air inlet. Thus, when the first air intake channel and the second air intake channel are connected, a strong return air mode can be achieved by closing the fresh air inlet and opening the fresh air inlet, and a strong fresh air mode can be achieved by closing the return air inlet and opening the fresh air inlet. This allows for more flexible switching between various air supply modes according to indoor air quality and temperature and humidity requirements.

[0025] In some embodiments, the first fan component includes a first centrifugal fan and a second centrifugal fan arranged coaxially, and the second fan component includes a third centrifugal fan and a fourth centrifugal fan arranged coaxially.

[0026] In this embodiment, the fan component uses multiple thin fans coaxially stacked, which enables a larger air volume and improves the air delivery capacity within the limited axial space of the fan component.

[0027] In some embodiments, the housing is used for mounting to a ceiling, wherein when the housing is mounted to the ceiling, the axes of both the first centrifugal fan and the second centrifugal fan are in the vertical direction.

[0028] This embodiment reduces the vertical space thickness by arranging the centrifugal fan's axis vertically, while also helping to direct the airflow horizontally, reducing direct airflow and improving comfort.

[0029] In some embodiments, the housing includes a first cavity and a partition plate disposed within the first cavity, the partition plate dividing the first cavity into a first air inlet channel and a second air inlet channel, and the connecting valve assembly is disposed on the partition plate.

[0030] This embodiment utilizes a partition plate to achieve physical isolation of the air intake channel. It has a simple structure, good sealing performance, reliable mode switching, and is easy to process and assemble. At the same time, by arranging the connecting valve assembly on the partition plate, it is convenient to arrange and can easily and effectively realize the switching between the connection and isolation of the first air intake channel and the second air intake channel.

[0031] In some embodiments, a second filter screen is further included, which covers the first air inlet and the second air inlet for filtering the air entering the first air inlet and the air entering the second air inlet.

[0032] This embodiment improves the filtration effect on the air and enhances the cleanliness of the supplied air by setting a second filter.

[0033] In some embodiments, the air outlet includes a first air outlet and a second air outlet, and the fresh air device further includes a third valve assembly for opening or closing the first air outlet and a fourth valve assembly for opening or closing the second air outlet.

[0034] This embodiment allows for independent control of two air outlets, enabling air delivery to different areas and improving the flexibility of air supply.

[0035] A second aspect of the present invention discloses a multi-split air conditioning system, including any of the aforementioned fresh air devices.

[0036] A third aspect of this invention discloses an air supply method, applying any of the aforementioned fresh air devices, including a first air supply method, a second air supply method, and / or a third air supply method; the first air supply method includes: opening the first valve assembly, closing the connecting valve assembly, and turning on the first fan component, so that air enters the first air inlet channel from the first air inlet and is drawn and delivered to the air outlet channel by the first fan component, and then the air is delivered out from the air outlet; the second air supply method includes: closing the first valve assembly, closing the connecting valve assembly, and turning on the second fan component, so that air enters the second air inlet channel from the second air inlet and is drawn and delivered to the air outlet channel by the second fan component, and then the air is delivered out from the air outlet; the third air supply method includes: closing the first valve assembly, opening the connecting valve assembly, and turning on the first fan component and the second fan component, so that air enters the first air inlet channel and the second air inlet channel from the second air inlet, and is drawn and delivered to the air outlet channel by the first fan component and the second fan component, and then the air is delivered out from the air outlet.

[0037] The air supply method of this embodiment can realize independent fresh air extraction and supply modes as well as independent return air extraction and supply modes. It can also utilize the first fan component and the second fan component to simultaneously extract and supply fresh air or return air to achieve a strong return air mode (or a strong fresh air mode). This allows for flexible switching according to indoor air quality and temperature and humidity requirements. It can meet daily energy-saving operation by isolating the first air intake channel and the second air intake channel, and can provide a strong air volume by connecting the first air intake channel and the second air intake channel when rapid purification or dehumidification is required.

[0038] In some embodiments, a fourth air supply method is further included, the fourth air supply method comprising: opening the first valve assembly, closing the connecting valve assembly, and opening the first fan component and the second fan component, so that air enters the first air inlet channel from the first air inlet and air enters the second air inlet channel from the second air inlet, then the air entering the first air inlet channel is drawn and delivered to the air outlet channel by the first fan component, and the air entering the second air inlet channel is drawn and delivered to the air outlet channel by the second fan component, and then the air entering the air outlet channel is delivered out from the air outlet.

[0039] The air supply method of this embodiment can realize parallel fresh air extraction and supply as well as return air extraction and supply modes. That is, the second fan component and the first fan component work at the same time, the second air inlet channel and the first air inlet channel are not connected, and fresh air and return air enter and exit from the first air inlet and the second air inlet to the air outlet channel. The return air and fresh air are mixed in the air outlet channel and then delivered to the air outlet.

[0040] Based on the fresh air equipment of this embodiment, multiple air supply modes can be realized by setting a connecting valve assembly to connect or disconnect the first air inlet channel and the second air inlet channel. When the first air inlet channel and the second air inlet channel are disconnected, independent fresh air extraction and supply modes and independent return air extraction and supply modes can be realized. When the first air inlet channel and the second air inlet channel are connected, the first fan component and the second fan component can be used to simultaneously extract and supply fresh air or return air to realize a strong return air mode (or a strong fresh air mode). This allows for flexible switching according to indoor air quality and temperature and humidity requirements, satisfying daily energy-saving operation while providing a strong air volume when rapid purification or dehumidification is needed.

[0041] Other features and advantages of the invention will become clear from the following detailed description of exemplary embodiments of the invention with reference to the accompanying drawings. Attached Figure Description

[0042] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0043] Figure 1 This is a cross-sectional view of the fresh air system according to an embodiment of the present invention;

[0044] Figure 2 for Figure 1 A bottom view of a portion of the structure of the fresh air system shown;

[0045] Figure 3 A cross-sectional structural schematic diagram of an air supply mode of a fresh air device according to another embodiment of the present invention;

[0046] Figure 4 This is a cross-sectional structural schematic diagram of another air supply mode of the fresh air device according to yet another embodiment of the present invention;

[0047] Figure 5 This is a cross-sectional structural schematic diagram of another air supply mode of a fresh air device according to yet another embodiment of the present invention;

[0048] Figure 6 This is a cross-sectional structural schematic diagram of another air supply mode of a fresh air device according to another embodiment of the present invention. Detailed Implementation

[0049] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0050] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0051] In the description of this invention, it should be understood that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0052] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0053] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0054] In conventional fresh air systems or dehumidifiers, the air intake ducts are usually independent, meaning that the fresh air intake duct and the return air intake duct are each connected to independent fan components, making it impossible to flexibly adjust according to load requirements. When rapid purification or dehumidification is needed indoors, the air volume is often limited, making it difficult to achieve strong suction and treatment of fresh or return air in a short time.

[0055] like Figures 1 to 6 As shown, the fresh air device in this embodiment includes a housing 100, a first air inlet 11, a first valve assembly 21, a second air inlet 12, a first air inlet channel 31, a second air inlet channel 32, an air outlet, an air outlet channel 33, a first fan component 41, a second fan component 42, and a connecting valve assembly 20.

[0056] The housing 100 is made of metal or plastic, or a combination of both. A first air inlet 11 is provided on the housing 100; a first valve assembly 21 is used to open or close the first air inlet 11; and a second air inlet 12 is provided on the housing 100.

[0057] In the embodiment shown in the figure, the first air inlet 11 is located on one side wall panel of the housing 100; the first valve assembly 21 is installed at the first air inlet 11. The first valve assembly 21 can be an electrically or hydraulically operated valve, such as an electric air valve. The electric air valve opens or closes the first air inlet 11 by rotating the valve plate. The rotation of the valve plate is directly driven by a motor or indirectly driven by the motor through a transmission component. The second air inlet 12 is located on one side wall panel of the housing 100.

[0058] The first air inlet channel 31 is disposed inside the housing 100 and is connected to the first air inlet 11. In this embodiment, the first air inlet channel 31 is indirectly connected to the first air inlet 11 through the first valve assembly 21. When the first valve assembly 21 is open, the first air inlet is connected to the first air inlet channel 31. When the first valve assembly 21 is closed, the first air inlet is not connected to the first air inlet channel 31.

[0059] The second air inlet channel 32 is located inside the housing 100 and is connected to the second air inlet 12. The second air inlet channel 32 and the second air inlet can be directly connected or indirectly connected through a valve assembly. When indirectly connected through a valve assembly, opening or closing the valve assembly can achieve the connection or disconnection between the second air inlet and the second air inlet channel.

[0060] An air outlet is located on the housing 100; an air outlet duct 33 is located inside the housing 100 and is connected to the air outlet. The air outlet is used to supply air into the room. The air outlet can supply air directly into the room, or it can be connected to an indoor air supply duct to supply air into the indoor air supply duct and then into the room.

[0061] The first fan component 41 includes a first fan component inlet connected to the first air inlet channel 31 and a first fan component outlet connected to the air outlet channel 33. The first fan component 41 is used to draw air from the first air inlet channel 31 and to deliver air to the air outlet channel 33.

[0062] The connection between the inlet of the first fan component and the first air inlet channel 31 can be direct or indirect via a valve assembly. In the embodiment shown in the figure, the inlet of the first fan component is directly connected to the first air inlet channel 31. Similarly, the connection between the outlet of the first fan component and the outlet channel 33 can be direct or indirect.

[0063] When the first air inlet is opened, the first fan component 41 is connected to the first air inlet. When the first fan component is working, it can draw air from the first air inlet channel 31, so that the air enters the first air inlet channel from the first air inlet. Then the air enters the first fan component from the inlet of the first fan component, and then flows out from the outlet of the first fan component to the outlet channel 33. Then the air is sent to the outlet through the outlet channel 33.

[0064] The air outlet duct can be equipped with various components such as dehumidifiers, cooling components, and heating components to dehumidify, cool, or heat the air passing through the air outlet duct.

[0065] The second fan component 42 includes a second fan component 42 inlet connected to the second air inlet channel 32 and a second fan component 42 outlet connected to the air outlet channel 33. The second fan component 42 is used to draw air from the second air inlet channel 32 and send air to the air outlet channel 33. The connection between the second fan component inlet and the second air inlet channel 32 can be a direct connection or an indirect connection through a valve assembly.

[0066] In the embodiment shown in the figure, the inlet of the second fan component is directly connected to the first air inlet channel 31. Similarly, the connection between the outlet of the second fan component and the outlet channel 33 can be direct or indirect. When the second fan component 42 is connected to the second air inlet, the second fan component can draw air from the second air inlet channel 32, allowing air to enter the second air inlet channel from the second air inlet. Then, the air enters the second fan component from the inlet and flows out from the outlet of the second fan component to the outlet channel 33, where it is then delivered to the air outlet.

[0067] The connecting valve assembly 20 is connected between the first air inlet channel 31 and the second air inlet channel 32. The connecting valve assembly 20 is used to connect or disconnect the first air inlet channel 31 and the second air inlet channel 32. One of the first air inlet 11 and the second air inlet 12 is a fresh air inlet for introducing fresh air, and the other is a return air inlet for introducing return air.

[0068] Fresh air refers to outdoor air, and return air refers to indoor air. The connecting valve assembly can be an electrically or hydraulically operated valve. When the first air inlet 11 is the fresh air inlet, the second air inlet 12 is the return air inlet. When the first air inlet 11 is the return air inlet, the second air inlet 12 is the fresh air inlet. The fresh air inlet can be connected to the outdoor fresh air duct to input fresh air.

[0069] When the connecting valve assembly 20 is open, the first air inlet channel 31 and the second air inlet channel 32 are connected to each other. Air entering the first air inlet channel 31 can simultaneously enter the second air inlet channel 32, and similarly, air entering the second air inlet channel 32 can simultaneously enter the first air inlet channel 31. When the connecting valve assembly 20 is closed, the first air inlet channel 31 and the second air inlet channel 32 are isolated and become independent. Air entering the first air inlet channel 31 cannot enter the second air inlet channel 32, and similarly, air entering the second air inlet channel 32 cannot enter the first air inlet channel 31.

[0070] When the first air inlet 11 is a fresh air inlet and the second air inlet 12 is a return air inlet, and the first air inlet channel 31 and the second air inlet channel 32 are separated, it can be as follows: Figure 3 As shown, an independent fresh air intake and supply mode is achieved, that is, the first fan component 41 draws fresh air from the first air intake channel 31, the fresh air enters the first air intake channel from the first air inlet, and then the fresh air is delivered to the air outlet channel 33 through the first fan component.

[0071] It can also be like Figure 4 As shown, independent return air extraction and air supply modes are realized, that is, the second fan component 42 draws return air from the second air inlet channel 31, the return air enters the second air inlet channel from the second air inlet, and then is delivered to the air outlet channel 33 through the second fan component.

[0072] It can also be like Figure 5 As shown, the system achieves parallel fresh air intake and supply, as well as return air intake and supply modes. That is, the first fan component 41 and the second fan component 42 work simultaneously. The first air inlet channel 31 and the second air inlet channel 32 are not connected. Fresh air enters the first air inlet channel from the first air inlet and then enters the first fan component. Return air enters the second air inlet channel from the second air inlet and then enters the second fan component. The first fan component 41 and the second fan component 42 simultaneously deliver fresh air and return air to the air outlet channel 33, respectively. The fresh air and return air are mixed in the air outlet channel and then delivered to the air outlet.

[0073] When the first air intake channel 31 and the second air intake channel 32 are connected, it can be as follows: Figure 6 As shown, a strong return air mode is achieved, that is, the first valve assembly is closed, no fresh air is input into the first air inlet, return air is input into the second air inlet, the first fan component 41 and the second fan component 42 work simultaneously, drawing return air from the second air inlet, the return air enters the second air inlet channel and then flows into the second fan component and into the first fan component through the first air inlet channel 31 respectively, and then the first fan component and the second fan component simultaneously send the return air into the air outlet channel.

[0074] When the first air inlet 11 is a return air inlet, the second air inlet 12 is a fresh air inlet. When the first air inlet channel 31 and the second air inlet channel 32 are separated, it can be as follows: Figure 4 As shown, independent fresh air extraction and supply modes are realized, that is, the second fan component 42 draws fresh air from the second air inlet channel 32, the fresh air enters the second air inlet channel from the second air inlet, and then the fresh air is delivered to the air outlet channel 33 through the second fan component.

[0075] It can also be like Figure 3As shown, independent return air extraction and air supply modes are realized, that is, the first fan component 41 draws return air from the first air inlet channel 31, the return air enters the first air inlet channel from the first air inlet, and then the return air is delivered to the air outlet channel 33 through the first fan component.

[0076] It can also be like Figure 5 As shown, parallel fresh air extraction and supply, as well as return air extraction and supply modes are realized. That is, the second fan component 42 and the first fan component 41 work simultaneously. The second air inlet channel 32 and the first air inlet channel 31 are not connected. Fresh air enters the second air inlet channel from the second air inlet and then enters the second fan component. Return air enters the first air inlet channel from the first air inlet and then enters the first fan component. The first fan component 41 and the second fan component 42 simultaneously deliver return air and fresh air to the air outlet channel 33 respectively. The return air and fresh air are mixed in the air outlet channel and then delivered to the air outlet.

[0077] When the first air intake channel 31 and the second air intake channel 32 are connected, it can be as follows: Figure 6 As shown, a strong return air mode is achieved, meaning the first valve assembly is closed, no return air is input into the first air inlet, and fresh air is input into the second air inlet. The first fan assembly 41 and the second fan assembly 42 operate simultaneously, drawing fresh air from the second air inlet. The fresh air enters the second air inlet channel and then flows into the second fan assembly and the first fan assembly through the first air inlet channel 31. Then, the first fan assembly and the second fan assembly simultaneously send the fresh air into the air outlet channel.

[0078] The fresh air device in this embodiment can achieve multiple air supply modes by connecting or disconnecting the first air intake channel 31 and the second air intake channel 32 through the connecting valve assembly 20. When the first air intake channel 31 and the second air intake channel 32 are disconnected, independent fresh air extraction and supply modes and independent return air extraction and supply modes can be achieved. When the first air intake channel 31 and the second air intake channel 32 are connected, the first fan component 41 and the second fan component 42 can simultaneously extract and supply fresh air or return air to achieve a strong return air mode (or a strong fresh air mode). This allows for flexible switching according to indoor air quality and temperature and humidity requirements. It can meet daily energy-saving operation by disconnecting the first air intake channel 31 and the second air intake channel 32, and provide a strong air volume by connecting the first air intake channel 31 and the second air intake channel 32 when rapid purification or dehumidification is required.

[0079] In some embodiments, the fresh air device further includes a first heat exchanger 51 and a second heat exchanger 52 disposed in the air outlet duct 33. The first heat exchanger 51 is used to cool and dehumidify the passing air, and the second heat exchanger 52 is used to heat up the cooled and dehumidified air.

[0080] like Figure 1As shown, a first heat exchanger 51 and a second heat exchanger 52 are arranged sequentially along the airflow direction within the air outlet duct 33. In the embodiment shown, the first and second heat exchangers are components of a refrigeration cycle system, which is a system commonly used in air conditioners and refrigerators, including compression, condensation, adiabatic expansion, and evaporation processes.

[0081] In the embodiment shown in the figure, the first heat exchanger 51 is an evaporator, inside which flows a low-temperature refrigerant. When air flows through the first heat exchanger 51, the heat in the air is absorbed by the refrigerant, and the air temperature decreases. At the same time, water vapor in the air condenses into water droplets as it reaches the dew point temperature, thereby achieving cooling and dehumidification. The second heat exchanger 52 is a condenser or other heater, inside which flows a high-temperature refrigerant. When the low-temperature air, after being cooled and dehumidified, flows through the second heat exchanger 52, it absorbs the heat released by the refrigerant, and the temperature rises back to near room temperature. When the first heat exchanger and the second heat exchanger are respectively an evaporator and a condenser, they can be in different refrigeration cycle systems. That is, the refrigeration cycle systems of the first heat exchanger and the second heat exchanger are independent of each other, and the refrigerant in the two refrigeration cycle systems does not circulate.

[0082] This embodiment can cool, dehumidify, and heat the air in the air outlet duct, reheating the dehumidified cold air to a comfortable temperature, avoiding excessively cold air supply, and achieving constant temperature dehumidification function. That is, the outlet air temperature is basically the same as the inlet air temperature, but the humidity is significantly reduced, improving the user's comfort experience.

[0083] In some embodiments, the fresh air device further includes a first filter 61 disposed within the air outlet duct 33, the first filter 61 being used to filter the air passing through the air outlet duct 33. For example... Figure 1 As shown, a first filter 61 is installed in the air outlet duct 33, upstream of the first heat exchanger 51. The first filter 61 is used to capture pollutants such as particulate matter, dust, and pollen in the air.

[0084] In this embodiment, the air supplied to the air outlet duct 33 is purified by passing it through the first filter to ensure that the air supplied to the room is clean, thereby improving the quality of the supplied air, realizing the purification function, and meeting the user's demand for healthy air.

[0085] In some embodiments, the fresh air device further includes a first temperature and humidity sensor 71 disposed within the first air inlet channel 31 and located between the first fan component 41 and the first air inlet 11, a second temperature and humidity sensor 72 disposed within the second air inlet channel 32 and located between the second fan component 42 and the second air inlet 12, and / or a third temperature and humidity sensor 73 located between the second heat exchanger 52 and the air outlet. As shown in the figure, the first temperature and humidity sensor 71 is installed within the first air inlet channel 31, located between the inlet of the first fan component and the first air inlet 11, and is used to detect the temperature and humidity of the fresh air or return air entering the first fan component. The second temperature and humidity sensor 72 is installed within the second air inlet channel 32, located between the inlet of the second fan component and the second air inlet 12, and is used to detect the temperature and humidity of the incoming air within the second air inlet channel 32. The third temperature and humidity sensor 73 is installed within the air outlet channel 33, located between the second heat exchanger 52 and the air outlet, and is used to detect the temperature and humidity of the finally delivered air.

[0086] This embodiment monitors the temperature and humidity on the air inlet and outlet sides in real time, and can automatically adjust the working state of the first and second heat exchangers according to preset targets. For example, the temperature of the first and second heat exchangers can be adjusted by adjusting the compressor frequency and expansion valve opening of the refrigeration cycle system, and the speed of the first and second fan components can be adjusted to achieve precise temperature and humidity control. This realizes intelligent temperature and humidity regulation function, and the regulation is more accurate and reliable.

[0087] In some embodiments, the first air inlet 11 and the second air inlet 12 are respectively a fresh air inlet and a return air inlet. The fresh air equipment also includes a second valve assembly, which is used to open or close the second air inlet 12. In this embodiment, a second valve assembly (not shown in the figure, but similar in structure to the first valve assembly 21) is installed at the second air inlet 12 to control the opening and closing of the return air inlet.

[0088] In this embodiment, both the fresh air inlet and the return air inlet are equipped with independent valve assemblies, which can independently control the opening and closing of the fresh air inlet and the return air inlet. Thus, when the first air inlet channel 31 and the second air inlet channel 32 are connected, a strong return air mode can be achieved by closing the fresh air inlet and opening the return air inlet, and a strong fresh air mode can be achieved by closing the return air inlet and opening the fresh air inlet. This allows for more flexible switching of various air supply modes according to indoor air quality and temperature and humidity requirements.

[0089] In some embodiments, the first fan component 41 includes a first centrifugal fan and a second centrifugal fan arranged coaxially, and the second fan component 42 includes a third centrifugal fan 421 and a fourth centrifugal fan 422 arranged coaxially. The first fan component 41 consists of two centrifugal fans (the first centrifugal fan and the second centrifugal fan), which share the same drive shaft and are stacked axially. Similarly, as Figure 2 As shown, the second fan component 42 is composed of a third centrifugal fan and a fourth centrifugal fan stacked coaxially. The centrifugal fan is an axial inlet and radial outlet type. In this embodiment, the centrifugal fan can be a double-inlet type with air inlet at both ends of the axial direction or a single-inlet type with air inlet at only one end of the axial direction. The air volume of the centrifugal fan mainly depends on the rotational speed and the blade diameter. When the rotational speed and blade diameter are the same, the air volume can be significantly increased by using multiple thin fans in the axial direction.

[0090] In this embodiment, the fan component uses multiple thin fans coaxially stacked, which enables a larger air volume and improves the air delivery capacity within the limited axial space of the fan component.

[0091] In some embodiments, the housing 100 is used for mounting to the ceiling, and when the housing 100 is mounted to the ceiling, the axes of both the first centrifugal fan and the second centrifugal fan are vertical. In this embodiment, the housing 100 is designed for ceiling mounting, fixed below the ceiling in the room. After installation, the rotation axes of the first and second centrifugal fans in the first fan component 41 are perpendicular to the horizontal plane, i.e., along the vertical direction. Similarly, the rotation axis of the second fan component 42 is also along the vertical direction.

[0092] Centrifugal fans are mostly thin-type. The axial dimension of a thin-type centrifugal fan is smaller than its radial dimension. In this embodiment, by arranging the axis of the centrifugal fan vertically, the vertical spatial thickness can be reduced. At the same time, it also helps to send the air out in the horizontal direction, reducing direct blowing and improving comfort.

[0093] In some embodiments, the housing 100 includes a first cavity and a partition plate 110 disposed in the first cavity. The partition plate 110 divides the first cavity into a first air inlet channel 31 and a second air inlet channel 32. A connecting valve assembly 20 is disposed on the partition plate 110.

[0094] As shown in the figure, the housing 100 has a large first cavity inside. A partition plate 110 is set in the middle of the cavity, dividing the cavity into two independent spaces (referring to the direction in the attached figure), which serve as the first air inlet channel 31 and the second air inlet channel 32, respectively. A connecting valve assembly is mounted on the partition plate and penetrates the partition plate. When the connecting valve assembly 20 is opened, the first air inlet channel 31 and the second air inlet channel 32 are connected.

[0095] This embodiment utilizes a partition plate to achieve physical isolation of the air intake channel. It has a simple structure, good sealing performance, reliable mode switching, and is easy to process and assemble. At the same time, by arranging the connecting valve assembly on the partition plate, it is convenient to arrange and can easily and effectively realize the switching between connecting and isolating the first air intake channel 31 and the second air intake channel 32.

[0096] In some embodiments, the fresh air device further includes a second filter 62, which covers the first air inlet 11 and the second air inlet 12 for filtering the air entering the first air inlet 11 and the air entering the second air inlet 12.

[0097] As shown in the figure, a large-area filter screen, namely the second filter screen 62, is provided on the air inlet side of the housing 100. The second filter screen 62 is large enough to cover the opening areas of both the first air inlet 11 and the second air inlet 12. When air enters from both air inlets, it must first pass through the second filter screen 62 to filter dust and other impurities. In some embodiments, two filters can be provided at the first air inlet and the second air inlet respectively to filter the air entering from the first air inlet 11 and the second air inlet 12.

[0098] This embodiment improves the filtration effect on the air and enhances the cleanliness of the supplied air by setting a second filter.

[0099] In some embodiments, the air outlet includes a first air outlet 81 and a second air outlet 82, and the fresh air device further includes a third valve assembly for opening or closing the first air outlet 81 and a fourth valve assembly for opening or closing the second air outlet 82.

[0100] In the embodiment shown in the figure, the air outlet includes two air supply outlets, a first air supply outlet 81 and a second air supply outlet 82. These two outlets can supply air to the same area or, through connecting air supply ducts, to different areas. For example, in this embodiment, one outlet can supply air indoors, and the other can supply air outdoors through a connecting duct. A third valve assembly is provided at the first air supply outlet 81, and a fourth valve assembly is provided at the second air supply outlet 82. These valves allow for independent control of the opening and closing of the two outlets, thereby enabling different air supply modes: indoor air supply and outdoor exhaust. The structures of the third and fourth valve assemblies can be similar to those of the first valve assembly.

[0101] This embodiment allows for independent control of two air outlets, enabling air delivery to different areas and improving the flexibility of air supply.

[0102] In some embodiments, a multi-split air conditioning system is also disclosed, including any of the above-described fresh air devices.

[0103] In some embodiments, an air supply method is also disclosed, which applies any of the above-mentioned fresh air devices and includes a first air supply method, a second air supply method, and a third air supply method.

[0104] The first air supply method includes: opening the first valve assembly 21, closing the connecting valve assembly 20, and turning on the first fan component 41, so that air enters the first air inlet channel 31 from the first air inlet 11 and is drawn and sent to the air outlet channel 33 by the first fan component 41, and then the air is sent out from the air outlet.

[0105] The second air supply method includes: closing the first valve assembly 21, closing the connecting valve assembly 20, and opening the second fan component 42, so that air enters the second air inlet channel 32 from the second air inlet 12 and is drawn and sent to the air outlet channel 33 by the second fan component 42, and then the air is sent out from the air outlet.

[0106] The third air supply method includes: closing the first valve assembly 21, opening the connecting valve assembly 20, and turning on the first fan component 41 and the second fan component 42, so that the air enters the first air inlet channel 31 and the second air inlet channel 32 from the second air inlet 12, and is drawn and sent to the air outlet channel 33 by the first fan component 41 and the second fan component 42, and then the air is sent out from the air outlet.

[0107] The air supply method of this embodiment can realize independent fresh air extraction and supply modes as well as independent return air extraction and supply modes. It can also utilize the first fan component 41 and the second fan component 42 to simultaneously extract and supply fresh air or return air to achieve a strong return air mode (or a strong fresh air mode). This allows for flexible switching according to indoor air quality and temperature and humidity requirements. It can meet daily energy-saving operation by isolating the first air intake channel 31 and the second air intake channel 32, and can provide a strong air volume by connecting the first air intake channel 31 and the second air intake channel 32 when rapid purification or dehumidification is required.

[0108] In some embodiments, the air supply method further includes a fourth air supply mode, which includes: opening the first valve assembly 21, closing the connecting valve assembly 20, and opening the first fan component 41 and the second fan component 42, so that air enters the first air inlet channel 31 from the first air inlet 11 and air enters the second air inlet channel 32 from the second air inlet 12, and then the air entering the first air inlet channel 31 is drawn and sent to the air outlet channel 33 by the first fan component 41 and the air entering the second air inlet channel 32 is drawn and sent to the air outlet channel 33 by the second fan component 42, and then the air entering the air outlet channel 33 is sent out from the air outlet.

[0109] The air supply method of this embodiment can realize the parallel fresh air extraction and supply mode and the return air extraction and supply mode. That is, the second fan component 42 and the first fan component 41 work at the same time. The second air inlet channel 32 and the first air inlet channel 31 are not connected. Fresh air and return air enter from the first air inlet and the second air inlet respectively. Then, fresh air and return air are sent out to the air outlet channel 33 respectively. Return air and fresh air are mixed in the air outlet channel and then delivered to the air outlet.

[0110] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of the present invention or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solutions of the present invention, and all such modifications and substitutions should be covered within the scope of the technical solutions claimed in the present invention.

Claims

1. A fresh air device, characterized in that, include: Casing (100); The first air inlet (11) is provided on the housing (100); The first valve assembly (21) is used to open or close the first air inlet (11); The second air inlet (12) is provided on the housing (100); The first air inlet channel (31) is located inside the housing (100) and connected to the first air inlet (11); The second air inlet channel (32) is located inside the housing (100) and is connected to the second air inlet (12); An air outlet is provided on the housing (100); An air outlet duct (33) is disposed inside the housing (100) and connected to the air outlet; The first fan component (41) includes a first fan component inlet connected to the first air inlet channel (31) and a first fan component outlet connected to the air outlet channel (33), for drawing air from the first air inlet channel (31) and sending air to the air outlet channel (33); The second fan component (42) includes a second fan component inlet connected to the second air inlet channel (32) and a second fan component outlet connected to the air outlet channel (33), for drawing air from the second air inlet channel (32) and supplying air to the air outlet channel (33); A connecting valve assembly (20) is connected between the first air inlet channel (31) and the second air inlet channel (32) for connecting or disconnecting the first air inlet channel (31) and the second air inlet channel (32). One of the first air inlet (11) and the second air inlet (12) is a fresh air inlet for inputting fresh air, and the other is a return air inlet for inputting return air.

2. The fresh air equipment as described in claim 1, characterized in that, It also includes a first heat exchanger (51) and a second heat exchanger (52) disposed in the air outlet channel (33). The first heat exchanger (51) is used to cool and dehumidify the passing air, and the second heat exchanger (52) is used to heat up the cooled and dehumidified air.

3. The fresh air equipment as described in claim 1, characterized in that, It also includes a first temperature and humidity sensor (71) disposed in the first air inlet channel (31) and located between the first fan component (41) and the first air inlet (11), a second temperature and humidity sensor (72) disposed in the second air inlet channel (32) and located between the second fan component (42) and the second air inlet (12), and / or a third temperature and humidity sensor (73) located between the second heat exchanger (52) and the air outlet.

4. The fresh air equipment as described in claim 1, characterized in that, The first air inlet (11) and the second air inlet (12) are respectively the fresh air inlet and the return air inlet. The fresh air equipment also includes a second valve assembly, which is used to open or close the second air inlet (12).

5. The fresh air equipment as described in claim 1, characterized in that, The first fan component (41) includes a first centrifugal fan and a second centrifugal fan arranged coaxially, and the second fan component (42) includes a third centrifugal fan (421) and a fourth centrifugal fan (422) arranged coaxially.

6. The fresh air equipment as described in claim 5, characterized in that, The housing (100) is used for mounting to the ceiling, and when the housing (100) is mounted to the ceiling, the axes of the first centrifugal fan and the second centrifugal fan are both in the vertical direction.

7. The fresh air equipment as described in any one of claims 1 to 6, characterized in that, The housing (100) includes a first cavity, and the fresh air device further includes a partition plate (110) disposed in the first cavity. The partition plate (110) divides the first cavity into a first air inlet channel (31) and a second air inlet channel (32). The connecting valve assembly (20) is disposed on the partition plate (110).

8. The fresh air equipment as described in any one of claims 1 to 6, characterized in that, The air outlet includes a first air outlet (81) and a second air outlet (82). The fresh air equipment also includes a third valve assembly for opening or closing the first air outlet (81) and a fourth valve assembly for opening or closing the second air outlet (82).

9. A multi-split air conditioning system, characterized in that, Includes the fresh air equipment as described in any one of claims 1-8.

10. A method for supplying air, characterized in that, The application of the fresh air equipment as described in any one of claims 1-8 includes a first air supply method, a second air supply method, and / or a third air supply method; the first air supply method includes: opening the first valve assembly (21), closing the connecting valve assembly (20), and opening the first fan component (41), so that air enters the first air inlet channel (31) from the first air inlet (11) and is drawn and delivered to the air outlet channel (33) by the first fan component (41), and then the air is delivered out from the air outlet; the second air supply method includes: closing the first valve assembly (21), closing the connecting valve assembly (20), and opening the second fan component (42), so that air enters the first air inlet channel (31) from the first air inlet (11) and is drawn and delivered to the air outlet channel (33) by the first fan component (41), and then the air is delivered out from the air outlet; The second air inlet (12) enters the second air inlet channel (32) and is drawn and sent to the air outlet channel (33) by the second fan component (42), and then the air is sent out from the air outlet; the third air supply method includes: closing the first valve assembly (21), opening the connecting valve assembly (20) and opening the first fan component (41) and the second fan component (42), so that the air enters the first air inlet channel (31) and the second air inlet channel (32) from the second air inlet (12), and is drawn and sent to the air outlet channel (33) by the first fan component (41) and the second fan component (42), and then the air is sent out from the air outlet.

11. The air supply method as described in claim 10, characterized in that, It also includes a fourth air supply method, which includes: opening the first valve assembly (21), closing the connecting valve assembly (20), and opening the first fan component (41) and the second fan component (42), so that air enters the first air inlet channel (31) from the first air inlet (11) and air enters the second air inlet channel (32) from the second air inlet (12), and then the air entering the first air inlet channel (31) is drawn and sent to the air outlet channel (33) by the first fan component (41), and the air entering the second air inlet channel (32) is drawn and sent to the air outlet channel (33) by the second fan component (42), and then the air entering the air outlet channel (33) is sent out from the air outlet.

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