Fresh air air conditioner all-in-one machine and intelligent control method thereof
By adopting a partitioned layout and intelligent control method in the integrated fresh air conditioning unit, the problems of large equipment size, high energy consumption and unstable operation have been solved, realizing a high-efficiency heat exchange and energy-saving integrated fresh air conditioning unit, improving user experience and operational safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- GUANGDONG XINDA TECH CO LTD
- Filing Date
- 2026-03-25
- Publication Date
- 2026-06-16
AI Technical Summary
Existing integrated fresh air conditioning units suffer from problems such as large equipment size, high energy consumption, severe airflow interference, inflexible operating modes, and poor operational stability, making it difficult to meet the dual needs of temperature regulation and air purification.
The internal space of the enclosure is divided into a first accommodating area and a second accommodating area by a partition, forming independent fresh air and air conditioning heat exchange paths. The refrigerant flow is controlled by a four-way reversing valve and an electronic expansion valve. Combined with a PTC heater and a filter, efficient heat exchange and temperature regulation between fresh air and indoor air are achieved. The operating mode is dynamically adjusted by intelligent control methods.
It improves heat exchange efficiency, reduces energy consumption, minimizes airflow interference, enhances operational stability and user experience, and achieves energy-saving and safe operation of the equipment.
Smart Images
Figure CN122216692A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of integrated fresh air conditioning units, and more particularly to an integrated fresh air conditioning unit and its intelligent control method. Background Technology
[0002] With the improvement of people's living standards and the enhancement of health awareness, the demand for indoor air quality and living comfort is increasing day by day. As a device for regulating indoor temperature, the function of air conditioners is no longer limited to simple cooling and heating. Integrated air conditioners with ventilation functions are gradually becoming the mainstream demand in the market. Integrated air conditioners combine the core functions of traditional air conditioners and fresh air systems. They can regulate indoor temperature while realizing the circulation and exchange of indoor and outdoor air, providing users with a constant temperature and clean indoor environment. They are especially suitable for residential buildings, offices and other places with strong airtightness and poor ventilation.
[0003] Currently, most integrated air conditioning and fresh air systems on the market adopt a traditional structure, simply superimposing the air conditioning and fresh air systems without zoning. Core components such as indoor and outdoor heat exchangers, compressors, and fresh air components are haphazardly arranged, resulting in bulky equipment that occupies excessive installation space and easily causes airflow interference, affecting the cooling and heating performance of the air conditioner and the efficiency of fresh air exchange. This makes it difficult to simultaneously meet the dual needs of temperature regulation and air purification. Furthermore, most integrated air conditioning and fresh air systems directly mix outdoor fresh air with indoor air during introduction. In summer, additional energy is needed to cool the hot fresh air, and in winter, it needs to heat the cold fresh air, leading to increased overall energy consumption and higher operating costs for users. In addition, the operating modes of existing integrated air conditioning and fresh air systems are not flexible enough, with poor coordination between cooling, heating, and fresh air functions. They cannot automatically adjust their operating status according to indoor and outdoor environmental parameters, easily leading to problems such as icing of the indoor heat exchanger, frosting of the outdoor heat exchanger, and system overheating. This affects the operational stability and lifespan of the equipment, and also reduces the user experience.
[0004] Therefore, existing technologies have shortcomings and need to be improved. Summary of the Invention
[0005] The technical problem to be solved by the present invention is to provide a fresh air conditioning unit with reasonable structural layout, high heat exchange efficiency, low energy consumption, and convenient installation and maintenance, as well as its intelligent control method.
[0006] To achieve this objective, the present invention adopts the following technical solution: a fresh air air conditioning unit, comprising a housing, an indoor heat exchanger, an outdoor heat exchanger, a compressor, a heat exchange filter, a fresh air unit assembly, and a blower assembly; The box is equipped with a partition, which is used to divide the internal space of the box into a first accommodating area and a second accommodating area. The indoor heat exchanger is horizontally arranged on the side of the first accommodating area, and the outdoor heat exchanger is vertically arranged in the second accommodating area. The compressor and the heat exchange filter are respectively located on both sides of the outdoor heat exchanger. An outdoor fresh air inlet is provided at the bottom of the box below the heat exchange filter element. A fresh air side partition is provided between the outdoor fresh air inlet and the heat exchange filter element. The fresh air side partition is used to separate the outdoor fresh air entering the box to form a first airflow passage and a second airflow passage. The first airflow passage leads to the outdoor heat exchanger, the second airflow passage leads to the heat exchange filter, and the fresh air unit is located on the second airflow passage to drive outdoor fresh air to flow into the first accommodating area after heat exchange through the heat exchange filter. An outdoor fan is provided on the side of the outdoor heat exchanger away from the fresh air unit. An outdoor exhaust port is provided at the bottom of the box below the outdoor fan. The outdoor exhaust port is used to exhaust the air that has been heated by the outdoor heat exchanger to the outside of the box. The heat exchange filter element is provided with a first indoor return air vent on the side of the housing. The first indoor return air vent is used to send indoor air into the housing and to discharge the indoor air to the outdoor exhaust vent after passing through the heat exchange filter element. The first accommodating area has a second indoor return air vent on each of the side walls of the housing. The top of the housing above the indoor heat exchanger has an indoor air supply vent. The second indoor return air vent is used to introduce indoor air into the first accommodating area. The air supply fan assembly is located in the first accommodating area to drive the air in the first accommodating area to flow through the indoor heat exchanger and then be sent out to the room through the indoor air supply vent.
[0007] The above-mentioned integrated fresh air conditioning unit also includes a four-way reversing valve and an electronic expansion valve, using the above technical solution. The discharge end of the compressor is connected to the indoor heat exchanger and the outdoor heat exchanger respectively through the four-way reversing valve, and the other end of the indoor heat exchanger and the outdoor heat exchanger is connected to the suction end of the compressor through the refrigerant pipeline. The electronic expansion valve is located on the refrigerant pipeline and is used to regulate the refrigerant flow rate through the indoor heat exchanger or the outdoor heat exchanger. The four-way reversing valve is used to switch the flow direction of refrigerant between the indoor heat exchanger and the outdoor heat exchanger, so that the indoor heat exchanger and the outdoor heat exchanger can switch between cooling mode and heating mode.
[0008] Using the above technical solution, in the integrated fresh air conditioning unit, the partition is provided with a communication port so that the air treated by the heat exchange filter can enter the first accommodating area through the communication port.
[0009] Using the above technical solution, in the integrated fresh air conditioning unit, the fresh air unit includes a first mounting plate, a first fan, and a first PTC heater; The first mounting plate is located between the fresh air side partition and the inner wall of the box. The first fan and the first PTC heater are respectively located on both sides of the first mounting plate. The first PTC heater is used to heat the outdoor fresh air entering the box.
[0010] In the above-mentioned technical solution, the integrated fresh air air conditioner is provided with a second fan on the first indoor return air vent. The second fan is used to drive indoor air into the housing and discharge it through the heat exchange filter element and then through the outdoor exhaust vent.
[0011] In the above technical solution, the integrated fresh air air conditioner has a first filter screen between the fresh air unit and the heat exchange filter element, a second filter screen between the first indoor return air inlet and the heat exchange filter element, and a third filter screen between the second indoor return air inlet and the air supply unit.
[0012] In the above technical solution, a second PTC heater is provided between the indoor air outlet and the indoor heat exchanger in the integrated fresh air air conditioning unit. The second PTC heater is used to heat the air after it has been processed by the indoor heat exchanger.
[0013] The above-mentioned integrated fresh air conditioning unit further includes a first water receiving tray and a second water receiving tray. The first water receiving tray is located at the bottom of the indoor heat exchanger, and the second water receiving tray is located at the bottom of the outdoor heat exchanger. Drain pipes are respectively provided on the first water receiving tray and the second water receiving tray. The drain pipes are inclined to discharge the condensate in the first water receiving tray and the second water receiving tray.
[0014] In the above-mentioned technical solution, the integrated fresh air conditioning unit has several lifting lugs on the side wall of the casing for connection with an external lifting structure.
[0015] This invention also provides an intelligent control method for a fresh air conditioning unit, comprising the fresh air conditioning unit described in any of the above technical solutions, including the following steps: S1. Collect operating parameters, which include at least the indoor ambient temperature T1, the indoor heat exchanger temperature T2, the outdoor heat exchanger temperature T3, the outdoor ambient temperature T4, and the user-set temperature Ts. S2. Determine the target operating mode based on the relationship between the indoor ambient temperature T1 and the user-set temperature Ts. The target operating mode includes at least one of the following: cooling mode, heating mode, ventilation mode, and automatic mode. S3. When the target operating mode is cooling mode or heating mode, control the operation of the compressor, outdoor fan, four-way reversing valve and electronic expansion valve, and adjust the compressor speed based on the deviation between the indoor ambient temperature T1 and the set temperature Ts to achieve heat exchange treatment of the air in the first containment area. S4. During operation, control the operation of the fresh air unit, the second fan and the air supply unit so that the outdoor fresh air and the indoor air exchange heat through the heat exchange filter, and the air entering the first containment area is processed by the indoor heat exchanger and then sent into the room through the indoor air supply outlet to achieve indoor air exchange and temperature regulation. S5. Based on the outdoor ambient temperature T4 and the indoor ambient temperature T1, control the start and stop of the first PTC heater and / or the second PTC heater to achieve fresh air preheating or auxiliary heating treatment of the supply air. S6. In cooling mode, when the indoor heat exchanger temperature T2 is lower than the preset anti-freeze temperature, the compressor is controlled to stop running, and the compressor is restarted after the indoor heat exchanger temperature T2 recovers to the preset recovery temperature to prevent the indoor heat exchanger from freezing. S7. In heating mode, when the indoor heat exchanger temperature T2 is higher than the preset overheat temperature, the compressor is controlled to reduce its operating frequency or stop operating, and resumes normal operation after the temperature returns to the preset range, so as to prevent the system from overheating. S8. In heating mode, when the outdoor heat exchanger temperature T3 and the outdoor ambient temperature T4 meet the preset frosting conditions, control the fresh air air conditioner to enter the defrosting mode to defrost the outdoor heat exchanger. The preset frosting conditions include: the temperature difference between the outdoor ambient temperature T4 and the outdoor heat exchanger temperature T3 is greater than a preset temperature difference threshold, and the outdoor heat exchanger temperature T3 is lower than the preset frosting temperature. In the defrost mode, the four-way reversing valve is switched to make the integrated fresh air air conditioner operate in cooling mode, and the operating status of the compressor and outdoor fan is adjusted to defrost the outdoor heat exchanger; when the temperature T3 of the outdoor heat exchanger rises to the preset defrost end temperature, the integrated fresh air air conditioner is controlled to exit the defrost mode and resume heating operation.
[0016] Compared with the prior art, the present invention has the following beneficial effects: This invention divides the internal space into a first and second accommodating area by installing a partition inside the enclosure. This, along with a fresh air side partition, forms a first and second airflow path. Under different operating modes, the fresh air unit, the second fan, and the supply fan unit are selectively operated. This allows outdoor fresh air to exchange heat with indoor air entering through the first indoor return air vent before entering the first accommodating area, or allows indoor air to circulate and exchange heat through the second indoor return air vent into the first accommodating area. This achieves switching between fresh air heat exchange and indoor circulation, thereby improving the heat exchange efficiency of the heat exchange filter and the indoor heat exchanger, reducing the fresh air handling load, and simultaneously reducing airflow. This system reduces interference and improves the overall energy efficiency and operational stability of the unit. Simultaneously, by collecting operating parameters such as indoor ambient temperature T1, indoor heat exchanger temperature T2, outdoor heat exchanger temperature T3, and outdoor ambient temperature T4, and determining the operating mode based on the user-set temperature Ts, the system coordinates the control of the compressor, four-way reversing valve, electronic expansion valve, outdoor fan, and other fan components. This allows the system to dynamically adjust its operating status according to actual working conditions, achieving anti-freezing control in cooling mode and overheating prevention and defrosting control in heating mode. This avoids problems such as heat exchanger icing, frosting, and system overheating, effectively improving the equipment's operational safety and environmental adaptability. Attached Figure Description
[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0018] The structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.
[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the housing of the present invention; Figure 3 This is a schematic diagram of the mounting structure of the second PTC heater of the present invention; Figure 4 This is a schematic diagram of the installation structure of the first and second water receiving trays of the present invention; Figure 5This is a schematic diagram of the airflow channel direction of the present invention. Detailed Implementation
[0020] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.
[0021] In the description of this invention, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be a component positioned centrally in the connection.
[0022] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.
[0023] like Figures 1 to 5As shown, this embodiment of the invention provides a fresh air conditioning unit, including a housing 1, an indoor heat exchanger 2, an outdoor heat exchanger 3, a compressor 4, a heat exchange filter 5, a fresh air unit 6, and a blower unit 7. The housing 1 has a partition 100 that divides the internal space of the housing 1 into a first accommodating area 101 and a second accommodating area 102. The indoor heat exchanger 2 is horizontally positioned on the side of the first accommodating area 101, and the outdoor heat exchanger 3 is vertically positioned within the second accommodating area 102. The compressor 4 and the heat exchange filter 5 are located on opposite sides of the outdoor heat exchanger 3. An outdoor fresh air inlet 11 is located at the bottom of the housing 1 below the heat exchange filter 5. A fresh air side partition 110 is provided between the inlet 11 and the heat exchange filter element 5. The fresh air side partition 110 is used to separate the outdoor fresh air entering the housing 1 into a first airflow path and a second airflow path. The first airflow path leads to the outdoor heat exchanger 3, and the second airflow path leads to the heat exchange filter element 5. The fresh air unit 6 is located on the second airflow path to drive the outdoor fresh air to flow into the first receiving area 101 after heat exchange through the heat exchange filter element 5. An outdoor fan 31 is provided on the side of the outdoor heat exchanger 3 away from the fresh air unit 6. An outdoor exhaust vent 12 is provided at the bottom of the housing 1 below the outdoor fan 31. The outdoor exhaust vent 12 is used to exhaust the outdoor fresh air entering the housing 1. After heat exchange, the air from the heat exchanger 3 is discharged outside the housing 1. By dividing the internal space into a first accommodating area 101 and a second accommodating area 102 using a partition 100 inside the housing 1, the air conditioning heat exchange system and the fresh air heat exchange system are structurally arranged in separate zones, thus avoiding mutual interference between different airflows. During operation, outdoor fresh air enters the housing 1 through the outdoor fresh air inlet 11 and is separated into a first airflow path and a second airflow path by the fresh air side partition 110. The outdoor fresh air flowing along the second airflow path enters the heat exchange filter 5 under the drive of the fresh air unit 6, exchanging heat with the introduced indoor air. This achieves pre-treatment of the fresh air without generating additional energy consumption, improving air quality. The system improves energy efficiency and air supply comfort. Fresh air treated by heat exchange filter 5 enters the first containment area 101, and is then cooled or heated by indoor heat exchanger 2 before being delivered into the room to achieve temperature regulation and fresh air replenishment. Meanwhile, the airflow entering the second containment area 102 along the first airflow path exchanges heat with outdoor heat exchanger 3. Under the action of outdoor fan 31, a stable heat exchange airflow is formed and discharged to the outside of the housing 1 through outdoor exhaust vent 12. Through the above structural arrangement, the fresh air heat exchange path and the air conditioning heat exchange path are reasonably separated in space and functionally coordinated. This not only improves the overall heat exchange efficiency and reduces energy loss, but also effectively reduces airflow crosstalk and improves the overall operating stability and energy-saving performance of the unit.
[0024] like Figure 2As shown, a first indoor return air inlet 13 is provided on the side of the housing 1 of the heat exchange filter element 5. The first indoor return air inlet 13 is used to send indoor air into the housing 1 and discharge the indoor air to the outdoor exhaust air outlet 12 after passing through the heat exchange filter element 5. Second indoor return air inlets 14 are respectively provided on the side walls of the housing 1 on both sides of the first accommodating area 101. An indoor air outlet 15 is provided on the top of the housing 1 above the indoor heat exchanger 2. The second indoor return air inlets 14 are used to introduce indoor air into the first accommodating area 101. The blower assembly 7 is located in the first accommodating area 101 to drive the air in the first accommodating area 101 to flow through the indoor heat exchanger 2 and then be sent out to the room from the indoor air outlet 15. By setting a first indoor return air vent 13 on the side of the housing 1 of the heat exchange filter element 5, indoor air can enter the housing 1 and flow through the heat exchange filter element 5. After exchanging heat with the outdoor fresh air entering from the outdoor fresh air inlet 11, it is discharged through the outdoor exhaust vent 12. Thus, the fresh air is pre-cooled or preheated during the exhaust process, reducing the subsequent air conditioning load and improving the energy efficiency of the whole unit. At the same time, some indoor air can be directly introduced into the first containment area 101 and flow through the indoor heat exchanger 2 under the drive of the fan assembly 7 for cooling or heating. Then it is sent back to the room through the indoor air outlet 15, thus forming an independent indoor circulating airflow channel. This setting can realize the coordinated operation of exhaust heat exchange and indoor circulation, which not only improves the fresh air heat exchange efficiency, but also ensures the heat exchange effect of the indoor heat exchanger 2, while avoiding mutual interference between different airflows, thereby improving the energy efficiency of the whole unit. It should be noted that, under different operating modes, the system can selectively operate the fresh air unit 6 and the supply air unit 7 by controlling them. This allows the outdoor fresh air to exchange heat with the indoor air entering through the first indoor return air inlet 13 before entering the first containment area 101, or allows the indoor air to enter the first containment area 101 through the second indoor return air inlet 14 for circulating heat exchange. This achieves the switching operation between fresh air heat exchange and indoor circulation, improves the heat exchange efficiency of the heat exchange filter 5 and the indoor heat exchanger 2, reduces the fresh air handling load, reduces airflow interference, and improves the overall energy-saving performance and operational stability of the unit.
[0025] like Figure 2As shown, further, it also includes a four-way reversing valve 81 and an electronic expansion valve 82; the discharge end of the compressor 4 is connected to the indoor heat exchanger 2 and the outdoor heat exchanger 3 respectively through the four-way reversing valve 81, and the other end of the indoor heat exchanger 2 and the outdoor heat exchanger 3 is connected to the suction end of the compressor 4 through a refrigerant pipeline; the electronic expansion valve 82 is provided on the refrigerant pipeline and is used to regulate the refrigerant flow rate through the indoor heat exchanger 2 or the outdoor heat exchanger 3; the four-way reversing valve 81 is used to switch the flow direction of the refrigerant between the indoor heat exchanger 2 and the outdoor heat exchanger 3, so that the indoor heat exchanger 2 and the outdoor heat exchanger 3 can switch between cooling mode and heating mode. When compressor 4 is running, the high-temperature and high-pressure refrigerant discharged from its discharge end first enters the four-way reversing valve 81. Under the control of the four-way reversing valve 81, the refrigerant can selectively flow to the indoor heat exchanger 2 or the outdoor heat exchanger 3. When the refrigerant flows to the indoor heat exchanger 2, the indoor heat exchanger 2 acts as a condenser to release heat, while the outdoor heat exchanger 3 acts as an evaporator to absorb heat, thereby achieving heating operation. Conversely, when the refrigerant flows to the outdoor heat exchanger 3, the outdoor heat exchanger 3 acts as a condenser to discharge heat to the outside, while the indoor heat exchanger 2 acts as an evaporator to absorb indoor heat, thereby achieving cooling operation. At the same time, the electronic expansion valve 82 is installed on the refrigerant pipeline, which can throttle and regulate the refrigerant to control the flow rate and pressure of the refrigerant entering the heat exchanger, so that the heat exchanger is always in good heat exchange condition.
[0026] like Figure 3 As shown, the partition 100 is further provided with a communication port 1001 so that the air treated by the heat exchange filter element 5 can enter the first accommodating area 101 through the communication port 1001. By providing the communication port 1001 on the partition 100, the air after the heat exchange filter element 5 can directly enter the first accommodating area 101, avoiding disorderly diffusion or circling of the airflow in the box 1, thereby shortening the airflow path and improving the heat exchange efficiency of the airflow.
[0027] like Figure 2 As shown, the fresh air unit 6 further includes a first mounting plate 61, a first fan 62, and a first PTC heater 63. The first mounting plate 61 is disposed between the fresh air side partition 110 and the inner wall of the housing 1. The first fan 62 and the first PTC heater 63 are respectively disposed on both sides of the first mounting plate 61. The first PTC heater 63 is used to heat the outdoor fresh air entering the housing 1, thereby increasing the fresh air temperature in a low-temperature environment. This avoids the direct entry of low-temperature air into the system, which could lead to a decrease in heat exchange efficiency or affect indoor comfort. It also helps to reduce the load on the subsequent indoor heat exchanger 2, thereby improving the overall stability and energy-saving performance of the unit in a low-temperature environment.
[0028] like Figure 2As shown, furthermore, a second fan 131 is provided on the first indoor return air vent 13. The second fan 131 is used to drive indoor air into the housing 1, and after passing through the heat exchange filter element 5, it is discharged from the outdoor exhaust vent 12. Under the action of the second fan 131, the indoor air enters the housing 1 through the first indoor return air vent 13, and exchanges heat with the outdoor fresh air flowing along the second airflow path at the heat exchange filter element 5, so that the energy in the discharged indoor air is recovered for pre-cooling or pre-heating treatment of the fresh air. Then, the indoor air is discharged to the outside of the housing 1 through the outdoor exhaust vent 12.
[0029] like Figure 2 As shown, furthermore, a first filter screen 91 is provided between the fresh air unit 6 and the heat exchange filter element 5, a second filter screen 92 is provided between the first indoor return air vent 13 and the heat exchange filter element 5, and a third filter screen 93 is provided between the second indoor return air vent 14 and the air supply unit 7. In this way, the air in different airflow channels can be purified to reduce the pollution of the heat exchange filter element 5 and the indoor heat exchanger 2, improve the heat exchange efficiency and air handling quality of the whole machine, and thus improve the energy-saving performance and operational reliability of the equipment.
[0030] like Figure 3 As shown, a second PTC heater 21 is further provided between the indoor air outlet 15 and the indoor heat exchanger 2. The second PTC heater 21 is used to heat the air after it has been processed by the indoor heat exchanger 2. After the air has been cooled or heated by the indoor heat exchanger 2 in the first containment area 101, it continues to flow towards the indoor air outlet 15 under the drive of the fan assembly 7. During this process, the air is reheated by the second PTC heater 21, which increases the air supply temperature. This effectively avoids the air supply temperature being too low and affecting indoor comfort when the ambient temperature is low or the heat exchange capacity of the indoor heat exchanger 2 is insufficient at the beginning of heating.
[0031] like Figure 4As shown, the system further includes a first water collection tray 22 and a second water collection tray 31. The first water collection tray 22 is located at the bottom of the indoor heat exchanger 2, and the second water collection tray 31 is located at the bottom of the outdoor heat exchanger 3. Each of the first and second water collection trays 22 and 31 is equipped with a drain pipe 221, which is inclined to drain the condensate from the trays. During cooling or heating operation, air flowing through the indoor and outdoor heat exchangers 2 and 3 will generate condensate due to temperature changes. This condensate drips into the first and second water collection trays 22 and 31 for collection. Then, under gravity, it automatically flows out of the housing 1 along the inclined drain pipe 221. By inclinedly setting the drain pipe 221, condensate can be prevented from stagnating or flowing back into the pipes, thus preventing overflow, corrosion, or bacterial growth caused by water accumulation. It also prevents the condensate from being carried away by the airflow again, which would affect the heat exchange effect.
[0032] like Figure 1 As shown, the side wall of the housing 1 is provided with several lifting lugs 103 for connecting with external lifting structures. During equipment installation or maintenance, the lifting lugs 103 can be connected to lifting tools or fixed components to achieve overall lifting or suspension installation of the equipment, making the whole machine suitable for ceiling-mounted or high-level installation scenarios.
[0033] This embodiment also provides an intelligent control method for a fresh air conditioning unit, including the following steps: S1. Collect operating parameters, which include at least the indoor ambient temperature T1, the indoor heat exchanger 2 temperature T2, the outdoor heat exchanger 3 temperature T3, the outdoor ambient temperature T4, and the user-set temperature Ts. S2. Determine the target operating mode based on the relationship between the indoor ambient temperature T1 and the user-set temperature Ts. The target operating mode includes at least one of the following: cooling mode, heating mode, ventilation mode, and automatic mode. S3. When the target operating mode is cooling mode or heating mode, control the operation of compressor 4, outdoor fan 31, four-way reversing valve 81 and electronic expansion valve 82, and adjust the speed of compressor 4 based on the deviation between the indoor ambient temperature T1 and the set temperature Ts, so as to achieve heat exchange treatment of the air in the first accommodating area 101. S4. During operation, control the operation of the fresh air unit 6, the second fan 131 and the air supply unit 7 so that the outdoor fresh air and the indoor air exchange heat through the heat exchange filter 5 respectively, and the air entering the first containment area 101 is processed by the indoor heat exchanger 2 and then sent into the room through the indoor air supply outlet 15 to achieve indoor air exchange and temperature regulation. S5. Based on the outdoor ambient temperature T4 and the indoor ambient temperature T1, control the start and stop of the first PTC heater 63 and / or the second PTC heater 21 to achieve fresh air preheating or auxiliary heating of the supply air. S6. In cooling mode, when the temperature T2 of the indoor heat exchanger 2 is lower than the preset anti-freeze temperature, the compressor 4 is controlled to stop running, and the compressor 4 is restarted after the temperature T2 of the indoor heat exchanger 2 recovers to the preset recovery temperature, so as to prevent the indoor heat exchanger 2 from freezing. S7. In heating mode, when the temperature T2 of the indoor heat exchanger 2 is higher than the preset overheating temperature, the compressor 4 is controlled to reduce its operating frequency or stop operating, and resumes normal operation after the temperature returns to the preset range, so as to prevent the system from overheating. S8. In heating mode, when the outdoor heat exchanger 3 temperature T3 and the outdoor ambient temperature T4 meet the preset frosting conditions, control the fresh air air conditioner to enter the defrosting mode to defrost the outdoor heat exchanger 3. The preset frosting conditions include: the temperature difference between the outdoor ambient temperature T4 and the outdoor heat exchanger 3 temperature T3 is greater than a preset temperature difference threshold, and the outdoor heat exchanger 3 temperature T3 is lower than the preset frosting temperature. In the defrost mode, the four-way reversing valve 81 is switched to make the integrated fresh air air conditioner operate in cooling mode, and the operating status of the compressor 4 and the outdoor fan 31 is adjusted to defrost the outdoor heat exchanger 3; when the temperature T3 of the outdoor heat exchanger 3 rises to the preset defrost end temperature, the integrated fresh air air conditioner is controlled to exit the defrost mode and resume heating operation.
[0034] During operation, the integrated fresh air conditioning unit can collect operating parameters such as indoor ambient temperature T1, indoor heat exchanger 2 temperature T2, outdoor heat exchanger 3 temperature T3, outdoor ambient temperature T4, and user-set temperature Ts. Based on these parameters, it determines the target operating mode according to the relationship between indoor ambient temperature T1 and user-set temperature Ts, thereby automatically selecting between cooling mode, heating mode, ventilation mode, and automatic mode. After determining the operating mode, when in cooling or heating mode, it controls the coordinated action of compressor 4, outdoor fan 31, four-way reversing valve 81, and electronic expansion valve 82, and according to... The compressor 4 speed is adjusted according to the deviation between the indoor ambient temperature T1 and the set temperature Ts, so that the air in the first containment zone 101 can achieve heat exchange treatment that matches the load, avoiding excessive operation and increased energy consumption. On this basis, by controlling the synchronous operation of the fresh air unit 6, the second fan 131 and the supply fan unit 7, the outdoor fresh air and indoor air exchange heat through the heat exchange filter 5 respectively, and the air entering the first containment zone 101 is processed by the indoor heat exchanger 2 and then sent into the room through the indoor air outlet 15, thereby achieving the coordination of fresh air introduction and temperature regulation. At the same time, according to the outdoor ambient temperature T4 and the indoor ambient temperature Ts, the compressor 4 speed is adjusted. Temperature T1 controls the start and stop of the first PTC heater 63 and / or the second PTC heater 21, preheating the fresh air in a low-temperature environment, thereby improving air supply comfort and reducing the load on the main unit. In cooling mode, when the indoor heat exchanger 2 temperature T2 is lower than the preset anti-freeze temperature, the compressor 4 is stopped in time and restarted after the temperature recovers to prevent the indoor heat exchanger 2 from freezing, affecting heat exchange efficiency and system safety. In heating mode, when the indoor heat exchanger 2 temperature T2 is higher than the preset overheat temperature, the compressor 4 is reduced in frequency or shut down to avoid system overheating. In addition, in heating mode, when the outdoor heat exchanger 3 temperature T2 is higher than the preset overheat temperature, the compressor 4 is controlled to reduce frequency or stop. When the outdoor ambient temperature T3 and T4 meet the preset frosting conditions, the system automatically enters the defrosting mode. By switching the four-way reversing valve 81, the integrated fresh air air conditioner operates in cooling mode for a short time. In conjunction with adjusting the operating status of the compressor 4 and the outdoor fan 31, the outdoor heat exchanger 3 is defrosted. After the outdoor heat exchanger 3 temperature T3 rises to the preset defrosting end temperature, the defrosting mode is exited and heating operation is resumed. Through the above control method, the various operating components are linked under different operating conditions, thereby improving the heat exchange efficiency and energy saving effect of the whole unit, preventing problems such as icing, overheating and frosting, and improving the operating stability and environmental adaptability of the whole unit.
[0035] Components not described in detail in this article are existing technologies and will not be elaborated upon here.
[0036] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims
1. A fresh air conditioning unit, characterized in that, Includes housing, indoor heat exchanger, outdoor heat exchanger, compressor, heat exchange filter element, fresh air unit assembly and air supply unit assembly; The box is equipped with a partition, which is used to divide the internal space of the box into a first accommodating area and a second accommodating area. The indoor heat exchanger is horizontally arranged on the side of the first accommodating area, and the outdoor heat exchanger is vertically arranged in the second accommodating area. The compressor and the heat exchange filter are respectively located on both sides of the outdoor heat exchanger. An outdoor fresh air inlet is provided at the bottom of the box below the heat exchange filter element. A fresh air side partition is provided between the outdoor fresh air inlet and the heat exchange filter element. The fresh air side partition is used to separate the outdoor fresh air entering the box to form a first airflow passage and a second airflow passage. The first airflow passage leads to the outdoor heat exchanger, the second airflow passage leads to the heat exchange filter, and the fresh air unit is located on the second airflow passage to drive outdoor fresh air to flow into the first accommodating area after heat exchange through the heat exchange filter. An outdoor fan is provided on the side of the outdoor heat exchanger away from the fresh air unit. An outdoor exhaust port is provided at the bottom of the box below the outdoor fan. The outdoor exhaust port is used to exhaust the air that has been heated by the outdoor heat exchanger to the outside of the box. The heat exchange filter element is provided with a first indoor return air vent on the side of the housing. The first indoor return air vent is used to send indoor air into the housing and to discharge the indoor air to the outdoor exhaust vent after passing through the heat exchange filter element. The first accommodating area has a second indoor return air vent on each of the side walls of the housing. The top of the housing above the indoor heat exchanger has an indoor air supply vent. The second indoor return air vent is used to introduce indoor air into the first accommodating area. The air supply fan assembly is located in the first accommodating area to drive the air in the first accommodating area to flow through the indoor heat exchanger and then be sent out to the room through the indoor air supply vent.
2. The integrated fresh air conditioning unit according to claim 1, characterized in that, It also includes a four-way directional valve and an electronic expansion valve; The discharge end of the compressor is connected to the indoor heat exchanger and the outdoor heat exchanger respectively through the four-way reversing valve, and the other end of the indoor heat exchanger and the outdoor heat exchanger is connected to the suction end of the compressor through the refrigerant pipeline. The electronic expansion valve is located on the refrigerant pipeline and is used to regulate the refrigerant flow rate through the indoor heat exchanger or the outdoor heat exchanger. The four-way reversing valve is used to switch the flow direction of refrigerant between the indoor heat exchanger and the outdoor heat exchanger, so that the indoor heat exchanger and the outdoor heat exchanger can switch between cooling mode and heating mode.
3. The integrated fresh air conditioning unit according to claim 1, characterized in that, The partition is provided with a communication port so that the air treated by the heat exchange filter element can enter the first accommodating area through the communication port.
4. The integrated fresh air conditioning unit according to claim 1, characterized in that, The fresh air unit assembly includes a first mounting plate, a first fan, and a first PTC heater; The first mounting plate is located between the fresh air side partition and the inner wall of the box. The first fan and the first PTC heater are respectively located on both sides of the first mounting plate. The first PTC heater is used to heat the outdoor fresh air entering the box.
5. The integrated fresh air conditioning unit according to claim 1, characterized in that, A second fan is provided on the first indoor return air vent. The second fan is used to drive indoor air into the housing and then discharge it through the heat exchange filter element and the outdoor exhaust vent.
6. The integrated fresh air conditioning unit according to claim 1, characterized in that, A first filter screen is provided between the fresh air unit and the heat exchange filter element, a second filter screen is provided between the first indoor return air vent and the heat exchange filter element, and a third filter screen is provided between the second indoor return air vent and the air supply unit.
7. The integrated fresh air conditioning unit according to claim 1, characterized in that, A second PTC heater is provided between the indoor air outlet and the indoor heat exchanger. The second PTC heater is used to heat the air after it has been processed by the indoor heat exchanger.
8. The integrated fresh air conditioning unit according to claim 1, characterized in that, It also includes a first water receiving tray and a second water receiving tray. The first water receiving tray is located at the bottom of the indoor heat exchanger, and the second water receiving tray is located at the bottom of the outdoor heat exchanger. The first water receiving tray and the second water receiving tray are respectively provided with drain pipes. The drain pipes are inclined to drain the condensate in the first water receiving tray and the second water receiving tray.
9. The integrated fresh air conditioning unit according to claim 1, characterized in that, The side wall of the box is provided with several lifting lugs for connecting with external lifting structures.
10. A smart control method for an integrated fresh air conditioning unit, comprising the integrated fresh air conditioning unit as described in any one of claims 1-9, characterized in that, Includes the following steps: S1. Collect operating parameters, which include at least the indoor ambient temperature T1, the indoor heat exchanger temperature T2, the outdoor heat exchanger temperature T3, the outdoor ambient temperature T4, and the user-set temperature Ts. S2. Determine the target operating mode based on the relationship between the indoor ambient temperature T1 and the user-set temperature Ts. The target operating mode includes at least one of the following: cooling mode, heating mode, ventilation mode, and automatic mode. S3. When the target operating mode is cooling mode or heating mode, control the operation of the compressor, outdoor fan, four-way reversing valve and electronic expansion valve, and adjust the compressor speed based on the deviation between the indoor ambient temperature T1 and the set temperature Ts to achieve heat exchange treatment of the air in the first containment area. S4. During operation, control the operation of the fresh air unit, the second fan and the air supply unit so that the outdoor fresh air and the indoor air exchange heat through the heat exchange filter, and the air entering the first containment area is processed by the indoor heat exchanger and then sent into the room through the indoor air supply outlet to achieve indoor air exchange and temperature regulation. S5. Based on the outdoor ambient temperature T4 and the indoor ambient temperature T1, control the start and stop of the first PTC heater and / or the second PTC heater to achieve fresh air preheating or auxiliary heating treatment of the supply air. S6. In cooling mode, when the indoor heat exchanger temperature T2 is lower than the preset anti-freeze temperature, the compressor is controlled to stop running, and the compressor is restarted after the indoor heat exchanger temperature T2 recovers to the preset recovery temperature to prevent the indoor heat exchanger from freezing. S7. In heating mode, when the indoor heat exchanger temperature T2 is higher than the preset overheat temperature, the compressor is controlled to reduce its operating frequency or stop operating, and resumes normal operation after the temperature returns to the preset range, so as to prevent the system from overheating. S8. In heating mode, when the outdoor heat exchanger temperature T3 and the outdoor ambient temperature T4 meet the preset frosting conditions, control the fresh air air conditioner to enter the defrosting mode to defrost the outdoor heat exchanger. The preset frosting conditions include: the temperature difference between the outdoor ambient temperature T4 and the outdoor heat exchanger temperature T3 is greater than a preset temperature difference threshold, and the outdoor heat exchanger temperature T3 is lower than the preset frosting temperature. In the defrost mode, the four-way reversing valve is switched to make the integrated fresh air air conditioner operate in cooling mode, and the operating status of the compressor and outdoor fan is adjusted to defrost the outdoor heat exchanger; when the temperature T3 of the outdoor heat exchanger rises to the preset defrost end temperature, the integrated fresh air air conditioner is controlled to exit the defrost mode and resume heating operation.