Air conditioning system and fresh air conditioning unit

Abstract

The utility model provides an air conditioning system and a fresh air conditioning unit, the air conditioning system comprises a fresh air port, a fresh air fan, a return air port, a return air fan, a filter module, a heat exchange module and an air supply port which are arranged in sequence, the fresh air port is communicated with the air inlet side of the fresh air fan, and the return air port is communicated with the air inlet side of the return air fan; the air outlet side of the fresh air fan communicates with the air inlet side of the filtering module, the air outlet side of the filtering module and the air outlet side of the air return fan communicate with the air inlet side of the heat exchange module, and the air outlet side of the heat exchange module communicates with the air inlet side of the air supply outlet. The radiation module comprises a radiation plate and a radiation pipeline; the heat exchange module comprises an air return channel and a fresh air channel which are mutually independent; the filtering module, the fresh air channel and the air supply outlet are sequentially communicated; and the air outlet side of the air return fan, the air return channel, the radiation pipeline and the air outlet are communicated in sequence. The fresh air conditioning unit comprises the air conditioning system. According to the utility model, the indoor pollution problem can be solved and the indoor air distribution can be optimized.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning technology, specifically to an air conditioning system and a fresh air conditioning unit. Background Technology

[0002] Air conditioning is a device used to regulate and control parameters such as temperature and humidity of indoor air. With my country's economic development, building energy consumption is increasing daily, and the energy consumption of air conditioning systems is also rising year by year, especially for medical air conditioning systems that have high air conditioning loads and stringent temperature and humidity requirements. Medical air conditioning systems differ from conventional air conditioning systems. Due to the special nature of the hospital environment, especially in cleanrooms such as operating rooms, which require stable temperature and humidity as well as a clean and sterile environment, the demands on air conditioning systems are much higher.

[0003] Existing medical air conditioning units perform multi-stage purification and filtration of fresh and return air before mixing and heat exchange before supplying air. However, long-term use cannot completely remove indoor pollutants, resulting in indoor environments that do not meet the air quality requirements for medical use. In addition, the existing medical air conditioning systems have a single type of terminal, and the air supply process affects the indoor airflow organization, failing to provide a comfortable medical environment for patients and medical staff. Utility Model Content

[0004] The primary objective of this invention is to provide an air conditioning system that can solve indoor pollution problems and optimize indoor airflow organization.

[0005] The second objective of this invention is to provide a fresh air conditioning unit that can solve indoor pollution problems and optimize indoor airflow organization.

[0006] The air conditioning system provided by this utility model, as its primary objective, includes a fresh air inlet, a fresh air fan, a return air inlet, a return air fan, a filter module, a heat exchange module, and an air supply outlet. The fresh air inlet is connected to the air inlet side of the fresh air fan, the return air inlet is connected to the air inlet side of the return air fan, the air outlet side of the fresh air fan is connected to the air inlet side of the filter module, the air outlet side of the filter module and the air outlet side of the return air fan are both connected to the air inlet side of the heat exchange module, and the air outlet side of the heat exchange module is connected to the air inlet side of the air supply outlet. It also includes a radiation module and an exhaust outlet. The radiation module includes connected radiation plates and radiation pipes. The heat exchange module includes independent return air channels and fresh air channels. The air outlet side of the filter module, the fresh air channel, and the air supply outlet are sequentially connected. The air outlet side of the return air fan, the return air channel, the radiation pipes, and the exhaust outlet are sequentially connected.

[0007] As can be seen from the above solution, this utility model mainly changes the existing method of mixing return air and fresh air to one where fresh air and return air are independent. Fresh air is still delivered to the room through the air supply vent, while return air, after temperature regulation, flows into the radiant module for temperature adjustment before being discharged outdoors through the exhaust vent. This setup not only optimizes indoor airflow organization but also prevents contaminated return air from mixing with fresh air and returning to the room, thus solving indoor pollution problems and providing a clean and comfortable indoor medical environment.

[0008] A further embodiment is that the filtration module includes at least two coarse filters and a control valve corresponding to each coarse filter; each coarse filter is connected to the air outlet side of the fresh air fan and the air inlet side of the fresh air duct through a corresponding filtration channel, and each filtration channel is equipped with a control valve; the coarse filters are detachable.

[0009] As can be seen from the above, long-term use and difficulty in cleaning filters are among the main reasons affecting air quality. This configuration includes a backup coarse filter in the system. The inlet side of the coarse filter is connected to the outlet side of the fresh air fan. The coarse filter is mainly responsible for removing larger particles in the air, such as dust, pollen, and fibers. Compared with other filters in the subsequent stages, the coarse filter is more prone to accumulating impurities, affecting the quality of fresh air and the air volume. Therefore, in this invention, when it is determined that the accumulated impurities on the current coarse filter exceed a certain level, the air supply to the current coarse filter can be stopped by controlling the valve and the backup coarse filter can be activated. Subsequently, the current coarse filter can be disassembled for cleaning or replacement without shutting down the system, thereby ensuring the air supply quality of the system and further solving the indoor pollution problem.

[0010] A further approach is to place the control valve upstream of the coarse filter.

[0011] As can be seen from the above, it is better to place the control valve upstream of the coarse filter rather than downstream, which can better block fresh air from reaching the current coarse filter to be cleaned and optimize the air supply path. In addition, the unit casing needs to be disassembled when removing and installing the coarse filter. If the control valve is placed downstream of the coarse filter, after the unit casing is removed, the fresh air fan and the casing opening will form an airflow path, which will waste fresh air and avoid affecting the process of removing and installing the coarse filter.

[0012] Another further solution is that the filtration module also includes a medium-efficiency filter, which has a higher filtration accuracy than the coarse filter; the air outlet side of the coarse filter is connected to the air inlet side of the medium-efficiency filter, and the air outlet side of the medium-efficiency filter is connected to the air inlet side of the fresh air duct.

[0013] As can be seen from the above, medium-efficiency filter components have higher filtration accuracy than coarse filters, and can filter out smaller particles and some gaseous pollutants, further improving filtration quality.

[0014] A further improvement is that the air conditioning system also includes a high-efficiency filter, which has a higher filtration accuracy than a medium-efficiency filter; the high-efficiency filter is installed between the air outlet side of the fresh air duct and the air inlet side of the supply air vent.

[0015] As can be seen from the above, the high-efficiency filter can filter out particles larger than 0.3 microns, with a filtration efficiency of over 99.97%. However, the high-efficiency filter can also obstruct the airflow of fresh air. Therefore, this invention places the high-efficiency filter downstream of the fresh air supply path, close to the air outlet, to avoid affecting the upstream heat exchange and humidification processes.

[0016] Another further option is that the heat exchange module includes a primary heat exchanger, the fresh air duct includes a first fresh air duct section located in the primary heat exchanger, and the return air duct includes a first return air duct section located in the primary heat exchanger; the first fresh air duct section and the first return air duct section exchange heat with each other in the primary heat exchanger.

[0017] As can be seen from the above, heat exchange is achieved between indoor return air and pre-treated fresh air through the primary heat exchanger.

[0018] A further proposed solution is that the heat exchange module also includes a temperature and humidity processor. Both the fresh air duct and the return air duct pass through the primary heat exchanger and the temperature and humidity processor in sequence. The fresh air duct includes a second fresh air duct section located in the temperature and humidity processor, and the return air duct includes a second return air duct section located in the temperature and humidity processor. The second fresh air duct section is equipped with a first heat exchanger and a humidifier arranged sequentially according to the fresh air flow direction, and the second return air duct section is equipped with a second heat exchanger.

[0019] As can be seen from the above, the temperature and humidity processor can regulate the temperature and humidity of the fresh air and the temperature of the return air. Since the return air is no longer mixed with the fresh air, nor is it supplied to the room, and the return air no longer requires humidity regulation, costs are reduced.

[0020] A further embodiment includes at least one of the following: the first heat exchanger is a first surface heat exchanger; the second heat exchanger is a second surface heat exchanger; the humidifier includes a water storage tank, a water storage container, a circulating water pump and nozzles, the water storage tank is connected to a second fresh air duct section, the nozzles are positioned towards the second fresh air duct section, the water storage tank is connected to the water storage container, and the circulating water pump is used to pump water from the water storage container to the nozzles.

[0021] Another further solution is to include an air quality sensor installed at the air outlet.

[0022] As can be seen above, air quality sensors are used to monitor the effectiveness of fresh air filtration and purification.

[0023] The second objective of this utility model is to provide a fresh air conditioning unit that includes the aforementioned air conditioning system. Attached Figure Description

[0024] Figure 1 This is a system connection diagram of an embodiment of the air conditioning system of this utility model.

[0025] Figure 2 This is a schematic diagram of the temperature and humidity processor in an embodiment of the air conditioning system of this utility model.

[0026] Figure 3 This is a schematic diagram of the radiation module in an embodiment of the air conditioning system of this utility model.

[0027] Figure 4 This is a cross-sectional schematic diagram of the radiation module in an embodiment of the air conditioning system of this utility model. Detailed Implementation

[0028] See Figure 1 The air conditioning system in this embodiment includes a fresh air inlet 11, a fresh air fan 12, a return air inlet 21, a return air fan 22, an exhaust outlet 14, a supply air outlet 13, a filter module, a high-efficiency filter 33, a heat exchange module 4, a radiation module 5, and an air quality sensor 6.

[0029] The filtration module includes a coarse filter 31 and a medium-efficiency filter 32. The medium-efficiency filter 32 has a higher filtration accuracy than the coarse filter 31, and the high-efficiency filter 33 has a higher filtration accuracy than the medium-efficiency filter 32. In this embodiment, there are two coarse filters 31.

[0030] The heat exchange module 4 includes a primary heat exchanger 41 and a temperature and humidity processor 42. The heat exchange module 4 includes independent return air ducts and fresh air ducts. The fresh air duct includes a first fresh air duct section 411 located in the primary heat exchanger 41, and the return air duct includes a first return air duct section 412 located in the primary heat exchanger 41.

[0031] Combination Figure 2 The fresh air duct includes a second fresh air duct section 421 located in the temperature and humidity processor 42, and the return air duct includes a second return air duct section 422 located in the temperature and humidity processor 42. The second fresh air duct section 421 is equipped with a first heat exchanger 43 and a humidifier 45 arranged sequentially in the direction of fresh air flow, and the second return air duct section 422 is equipped with a second heat exchanger 44.

[0032] In this embodiment, the first heat exchanger 43 is a first surface heat exchanger, which includes a first inlet pipe 431 and a first outlet pipe 432, and a first valve 433 is provided on the first inlet pipe 431; the second heat exchanger 44 is a second surface heat exchanger, which includes a second inlet pipe 441 and a second outlet pipe 442, and a second valve 443 is provided on the second inlet pipe 441.

[0033] In this embodiment, the humidifier 45 includes a water storage tank 451, a water storage container 452, a circulating water pump 453, and a nozzle 454. The water storage tank 451 is connected to the second fresh air duct section 421 and can hold the return water in the duct section. The water storage tank 451 is connected to the water storage container 452, and the water in the water storage tank 451 flows into the water storage container 452. The nozzle 454 is set towards the second fresh air duct section 421. The circulating water pump 453 is used to pump the water in the water storage container 452 to the nozzle 454 to spray water mist onto the second fresh air duct section 421 and humidify the fresh air.

[0034] See Figure 3 and Figure 4 The radiation module 5 includes a radiation plate 52 and radiation pipes 51 connected to each other. The radiation module 5 also includes an inflow manifold 518 and an outflow manifold 519. The inlets of the multiple radiation pipes 51 are all connected to the inflow manifold 518 and the outlets of the multiple radiation pipes 51 are all connected to the outflow manifold 519. The pipe walls of the multiple radiation pipes 51 are all connected to the surface of the radiation plate 52, and heat exchange can be performed between the radiation pipes 51 and the radiation plate 52.

[0035] See Figure 1 The filtration module includes at least two coarse filters 31 and a control valve 319 corresponding to each coarse filter 31. The control valve 319 is an airflow shut-off valve. Each coarse filter 31 is connected between the air outlet side of the fresh air fan 12 and the air inlet side of the fresh air duct through a corresponding filter channel 318. Each filter channel 318 is equipped with a control valve 319. The coarse filters 31 are detachable. In this embodiment, the control valve 319 is located upstream of the coarse filter 31.

[0036] In addition, the high-efficiency filter 33 is installed between the air outlet side of the fresh air duct and the air inlet side of the air outlet 13, and the air quality sensor 6 is installed at the air outlet 13.

[0037] See Figures 1 to 4 The fresh air inlet 11 is connected to the air inlet side of the fresh air fan 12, and the air outlet side of the fresh air fan 12 is connected to the air inlet side of each coarse filter 31 through each filter channel 318. The air outlet side of each coarse filter 31 is connected to the air inlet side of the medium-efficiency filter 32. When it is determined that the accumulated impurities on the current coarse filter 31 exceed a certain level, the air supply to the current coarse filter 31 can be stopped by the control valve 319, and a backup coarse filter 31 can be activated. Subsequently, the current coarse filter 31 can be disassembled for cleaning or replacement without shutting down the system, thereby ensuring the air supply quality of the system and further solving the indoor pollution problem.

[0038] The outlet side of the medium-efficiency filter 32 is connected to the inlet side of the first fresh air duct section 411 in the primary heat exchanger 41 of the fresh air duct. The first fresh air duct section 411 of the primary heat exchanger 41 is connected to the second fresh air duct section 421 of the temperature and humidity processor 42. The outlet side of the second fresh air duct section 421 is connected to the inlet side of the high-efficiency filter 33. The outlet side of the high-efficiency filter 33 is connected to the inlet side of the air outlet 13. The outlet side of the air outlet 13 is connected to the indoor environment.

[0039] The return air fan 22 is connected to the air inlet side of the return air fan 22. The air outlet side of the return air fan 22 is connected to the air inlet side of the first return air passage section 412 of the primary heat exchanger 41. The first return air passage section 412 is connected to the second return air passage section 422. The air outlet side of the second return air passage section 422 is connected to the air inlet side of the inflow manifold 518 of the radiant module 5. The air outlet side of the outflow manifold 519 of the radiant module 5 is connected to the air inlet side of the exhaust port 14. The air outlet side of the exhaust port 14 is connected to the outdoor environment.

[0040] This invention primarily changes the existing method of mixing return air and fresh air, making them independent. Fresh air is still delivered indoors through the air supply vent 13, while return air, after temperature regulation, flows into the radiant module 5 for temperature adjustment before being discharged outdoors through the exhaust vent 14. This setup not only optimizes indoor airflow organization but also prevents contaminated return air from mixing with fresh air and returning to the room, thus solving indoor pollution problems and providing a clean and comfortable indoor medical environment.

[0041] Furthermore, the difficulty in cleaning filters after prolonged use is also a major factor affecting air quality. The coarse filter 31 is primarily responsible for removing larger particles in the air, such as dust, pollen, and fibers. Compared to other filters in the subsequent stages, the coarse filter 31 is more prone to accumulating impurities, affecting the quality of fresh air and the air volume supplied. Therefore, this invention includes a backup coarse filter 31. Generally, one control valve 319 is open while the other is closed, and only one coarse filter 31 is activated at a time. When it is determined that the accumulated impurities on the current coarse filter 31 exceed a certain level, the air supply to the current coarse filter 31 can be stopped by controlling valve 319, and the backup coarse filter 31 can be activated. Subsequently, the current coarse filter 31 can be disassembled for cleaning or replacement without shutting down the system, thereby ensuring the air supply quality of the system and further addressing indoor pollution problems.

[0042] Better yet, the control valve 319 is located upstream of the coarse filter 31 rather than downstream. When disassembling and assembling the coarse filter 31, the unit housing needs to be disassembled. If the control valve 319 is located downstream of the coarse filter 31, after disassembling the unit housing, the fresh air fan 12 and the housing opening will form an airflow path, which will waste fresh air and avoid affecting the disassembly and assembly of the coarse filter 31.

[0043] In this air conditioning system, taking summer as an example, the relatively warm outdoor air and the relatively cool indoor return air, after preliminary treatment, exchange heat in the primary heat exchanger, resulting in a decrease in the pre-cooling temperature of the fresh air and an increase in the temperature of the return air. In the temperature and humidity processor 42, the first surface heat exchanger 43 and the second surface heat exchanger 44 are controlled by the first valve 433 and the second valve 443 respectively to process the fresh air and return air. The fresh air temperature is reduced to T0℃, and the return air temperature is reduced to T0 + (3~5)℃. For example, the fresh air temperature is reduced to 13℃, and the return air temperature is reduced to 16~18℃. Subsequently, the low-temperature fresh air passes through the high-efficiency filter 33 and is sent into the room through the air outlet 13, while the low-temperature return air enters the radiant module 5 for temperature adjustment. The radiant panel 52 is oriented to control the temperature in areas requiring less airflow.

[0044] Taking winter as an example, the relatively low outdoor temperature fresh air and the relatively high indoor temperature return air, after preliminary treatment, exchange heat in the primary heat exchanger 41, increasing the preheated temperature of the fresh air and decreasing the temperature of the return air. In the temperature and humidity processor 42, the fresh air and return air are treated separately. The fresh air temperature is increased to T1℃, and the return air temperature is increased to T1-(3~5)℃. For example, if the fresh air temperature is increased to 33℃, the return air temperature is increased to 28~30℃.

[0045] In addition, when the air quality sensor 6 detects that the air quality does not meet the requirements, it first switches to the backup coarse filter 31 through the control valve 319, then removes the current coarse filter 31, cleans it, and replaces it, thereby reducing the impact on the indoor fresh air volume and air quality.

[0046] In addition, this utility model also claims protection for a fresh air conditioning unit that includes an air conditioning system of this utility model.

[0047] Finally, it should be emphasized that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An air conditioning system, comprising a fresh air inlet, a fresh air fan, a return air inlet, a return air fan, a filter module, a heat exchange module, and an air supply outlet, wherein the fresh air inlet is connected to the air inlet side of the fresh air fan, the return air inlet is connected to the air inlet side of the return air fan, the air outlet side of the fresh air fan is connected to the air inlet side of the filter module, the air outlet side of the filter module and the air outlet side of the return air fan are both connected to the air inlet side of the heat exchange module, and the air outlet side of the heat exchange module is connected to the air inlet side of the air supply outlet; Its features are: It also includes a radiation module and an exhaust vent, wherein the radiation module includes a radiation plate and a radiation pipe connected together; The heat exchange module includes independent return air ducts and fresh air ducts; The air outlet of the filter module, the fresh air channel, and the air supply outlet are connected in sequence. The air outlet side of the return air fan, the return air duct, the radiant duct, and the exhaust port are connected in sequence.

2. The air conditioning system according to claim 1, characterized in that: The filtration module includes at least two coarse filters and a control valve corresponding to each coarse filter; Each of the coarse filters is connected between the air outlet side of the fresh air fan and the air inlet side of the fresh air duct through a corresponding filter channel, and each filter channel is equipped with the control valve; The coarse filter is removable.

3. The air conditioning system according to claim 2, characterized in that: The control valve is located upstream of the coarse filter.

4. The air conditioning system according to claim 2, characterized in that: The filtration module also includes a medium-efficiency filter, which has a higher filtration accuracy than the coarse filter. The outlet side of the coarse filter is connected to the inlet side of the medium-efficiency filter, and the outlet side of the medium-efficiency filter is connected to the inlet side of the fresh air duct.

5. The air conditioning system according to claim 4, characterized in that: It also includes a high-efficiency filter, the high-efficiency filter having a higher filtration accuracy than the medium-efficiency filter; The high-efficiency filter is disposed between the air outlet side of the fresh air duct and the air inlet side of the air supply port.

6. The air conditioning system according to any one of claims 1 to 5, characterized in that: The heat exchange module includes a primary heat exchanger, the fresh air duct includes a first fresh air duct section located in the primary heat exchanger, and the return air duct includes a first return air duct section located in the primary heat exchanger. The first fresh air duct section and the first return air duct section exchange heat with each other in the primary heat exchanger.

7. The air conditioning system according to claim 6, characterized in that: The heat exchange module also includes a temperature and humidity processor, and the fresh air duct and the return air duct both pass through the primary heat exchanger and the temperature and humidity processor in sequence. The fresh air duct includes a second fresh air duct section located in the temperature and humidity processor, and the return air duct includes a second return air duct section located in the temperature and humidity processor; The second fresh air duct section is equipped with a first heat exchanger and a humidifier arranged sequentially according to the fresh air flow direction, and the second return air duct section is equipped with a second heat exchanger.

8. The air conditioning system according to claim 7, characterized in that: Includes at least one of the following: The first heat exchanger is a first surface heat exchanger; The second heat exchanger is a second surface heat exchanger; The humidifier includes a water storage tank, a water container, a circulating water pump, and a nozzle. The water storage tank is connected to the second fresh air duct section, and the nozzle is positioned facing the second fresh air duct section. The water storage tank is connected to the water container, and the circulating water pump is used to pump water from the water container to the nozzle.

9. The air conditioning system according to any one of claims 1 to 5, characterized in that: It also includes an air quality sensor installed at the air outlet.

10. A fresh air conditioning unit, characterized in that, Includes the air conditioning system described in any one of claims 1 to 9.

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