An integrated operating room air conditioning system

Abstract

This invention discloses an integrated operating room air conditioning system, belonging to the field of medical clean air conditioning technology. It includes a fresh air handling unit, an integrated clean room unit, and an automatic control system. The integrated clean room unit includes at least one operating room, each equipped with a recirculating air handling system. The fresh air handling unit is connected to the integrated clean room unit. The automatic control system is connected to the fresh air handling unit, the temperature control coil, and the recirculating fan. The fresh air handling unit is used to process the humidity of the fresh air and maintain the pressure environment of the operating room. The recirculating air handling system is used to filter and regulate the temperature of the indoor recirculated air. Through this invention, a fresh air handling unit, an integrated clean room unit, and an automatic control system are configured. The fresh air handling unit is dedicated to fresh air humidity regulation and pressure compensation. The integrated clean room unit is equipped with a recirculating air handling system and an integrated temperature control coil for indoor temperature regulation, thereby achieving temperature and humidity control.

Description

Technical Field

[0001] This invention relates to an integrated operating room air conditioning system, belonging to the field of medical clean air conditioning technology. Background Technology

[0002] In clean operating rooms, sterile wards, and other clean spaces in hospitals with high requirements for air cleanliness, temperature and humidity control, and pressure gradient control, air conditioning systems are required to ensure indoor air purification, suitable temperature and humidity, and pressure gradient maintenance in order to ensure the safety and stability of the medical operating environment.

[0003] Currently, clean operating room air conditioning systems typically operate using a combination of centralized air handling units and terminal recirculating air handling systems. However, these existing technologies still have certain shortcomings: First, temperature control, humidity control, and cleanliness control usually rely on multiple independent systems, resulting in low system integration, a large number of devices, and a large space requirement, which is not conducive to modular assembly and standardized construction. Second, in summer cooling conditions, fresh air is often not thoroughly dehumidified, requiring the terminal recirculating air handling system to perform deep dehumidification, resulting in a significant "supercooling and reheating" energy offsetting process and high overall system energy consumption. Third, some recirculating air handling structures only use a single convection heat exchange method and lack heat exchange design that coordinates with the building envelope, leaving room for improvement in indoor temperature distribution uniformity and heat exchange efficiency.

[0004] Therefore, it is necessary to design an integrated operating room air conditioning system to solve the above problems. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide an integrated operating room air conditioning system, which solves the problems of complex traditional equipment systems, complex summer cooling conditions, and low heat exchange efficiency.

[0006] The technical problem to be solved by this invention is achieved by the following technical solution: an integrated operating room air conditioning system. This includes fresh air handling units, integrated clean room units, and automatic control systems; The integrated clean room unit includes at least one operating room, and each operating room is equipped with a recirculating air handling system; The circulating air handling system includes a return air inlet, a circulating air duct, a filter unit, a temperature control coil, a circulating fan, and an air supply unit. The return air inlet is connected to the circulating air duct, the filter unit, the temperature regulating coil and the circulating fan are installed in the circulating air duct, and the circulating air duct is connected to the air supply unit to form a circulating air path; The fresh air unit is connected to the integrated clean room unit and is used to deliver treated fresh air to the operating room; The automatic control system is connected to the fresh air handling unit, the temperature control coil and the circulating fan respectively; The fresh air handling unit is used to process the humidity of the fresh air and maintain the pressure environment of the operating room, while the circulating air handling system is used to filter and regulate the temperature of the indoor circulating air.

[0007] Preferably, the air supply unit is an air supply ceiling installed at the top of the operating room.

[0008] Preferably, a high-efficiency filter is provided at the air outlet of the air supply ceiling.

[0009] Preferably, the return air vents are located at the bottom of both sides of the operating room, and the circulating air ducts are located inside the side walls of the operating room; Indoor air enters the circulating air duct through the return air inlet, passes through the filter unit, temperature control coil and circulating fan in sequence, and is then sent back to the operating room through the air supply unit to form a circulating airflow.

[0010] Preferably, the fresh air handling unit includes a pre-filter, a medium-efficiency filter, a sub-high-efficiency filter, a surface cooler, an evaporator, a condenser, a heater, a reversible heat exchanger, a humidifier, and a compressor.

[0011] Preferably, the humidifier is a steam humidifier. The steam humidifier is one of the following: an electrode-type steam humidifier, an electric heating steam humidifier, or a dry steam humidifier.

[0012] Preferably, in the cooling season operation mode, the surface cooler is used to pre-cool the fresh air, the evaporator is used to deeply dehumidify the fresh air, and the reversible heat exchanger operates as a condenser to reheat the dehumidified air.

[0013] Preferably, in the heating season operation mode, the fresh air unit uses a condenser to preheat the fresh air, a heater to heat the supply air, a reversible heat exchanger to operate as an evaporator to cool the supply air, and a humidifier to humidify the supply air.

[0014] Preferably, it also includes a cold / heat source system, which is connected to the temperature-regulating coil and is used to provide cooling or heating to the temperature-regulating coil.

[0015] Preferably, the heat source / cold source system adopts a VRV system.

[0016] Preferably, the VRV system is connected to temperature control coils corresponding to multiple operating rooms for asynchronous heating and cooling supply to multiple operating rooms.

[0017] Preferably, the automatic control system includes a temperature sensor, a humidity sensor, and a differential pressure sensor; The automatic control system performs coordinated control of the fresh air unit, circulating fan, and cold and heat source system based on parameters collected by temperature sensors, humidity sensors, and differential pressure sensors.

[0018] Preferably, the filtration unit includes a medium-efficiency filter disposed within the circulating air duct; The temperature regulating coil adopts a coil-type heat exchanger, which is installed in the circulating air duct and forms convective heat exchange with the circulating air.

[0019] Preferably, the temperature regulating coil is a radiative convection heat exchanger, which is pre-embedded inside the enclosure structure that forms the circulating air duct, and exchanges radiative heat with the internal environment of the operating room through the inner wall of the circulating air duct.

[0020] The beneficial effects of this invention are: (1) Through this invention, a fresh air handling unit, an integrated clean room unit, and an automatic control system are set up. The fresh air handling unit is dedicated to fresh air humidity regulation and pressure compensation. The integrated clean room unit is equipped with a circulating air handling system and an integrated temperature control coil for indoor temperature regulation. This realizes the functional separation and structural integration of temperature control, humidity control and cleanliness control, reduces the configuration of independent air handling units and auxiliary equipment, makes the overall system structure more compact, reduces the requirements for machine room and installation space, and improves the modular assembly efficiency and standardized construction level.

[0021] (2) Through this invention, a multi-stage processing structure consisting of a surface cooler, an evaporator, and a reversible heat exchanger is set up in the fresh air handling unit. This allows the fresh air to be pre-cooled and dehumidified during the surface cooling stage, and to be deeply dehumidified during the evaporation stage. The reversible heat exchanger is used as a condenser during the cooling season to reheat the dehumidified air. This allows the temperature to rise through the heat exchange process inside the system, reducing the additional reheat energy input, reducing energy loss during the dehumidification-reheat process, and improving the overall energy efficiency of the system. (3) Through this invention, the temperature regulating coil is pre-embedded inside the enclosure structure of the circulating air duct, and the temperature regulating coil forms convective heat exchange with the air in the circulating air duct. At the same time, radiative heat exchange is formed between the inner wall of the air duct and the indoor space, so that convective heat exchange and radiative heat exchange work together to expand the effective heat exchange area and improve the heat exchange path, improve the uniformity of the indoor temperature field and the overall heat exchange efficiency, and enhance the stability and comfort of the operating room environment. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the present invention.

[0023] Figure 2 This is a schematic diagram of the fresh air handling unit of the present invention.

[0024] Figure 3 This is a schematic diagram of the circulating air treatment system of the present invention.

[0025] Figure 4 This is a schematic diagram of another circulating air treatment system according to the present invention.

[0026] Figure 5 This is a schematic diagram of the airflow in the circulating air handling system of the present invention.

[0027] Figure 6 This is a schematic diagram illustrating the interaction between the VRV system and the circulation system of the present invention.

[0028] Figure 7 This is a physical image of the fresh air handling unit of the present invention.

[0029] In the diagram: 1-Fresh air handling unit, 11-Pre-filter, 12-Medium-efficiency filter, 121-Sub-high-efficiency filter, 13-Cooler, 14-Evaporator, 15-Condenser, 16-Heater, 17-Reversible heat exchanger, 18-Humidifier, 19-Compressor, 2-Integrated clean room unit, 21-Operating room, 22-Circulating air handling system, 221-Return air outlet, 222-Circulating air duct, 223-Filter unit, 224-Temperature control coil, 225-Circulating fan, 226-Supply air unit, 3-VRV system, 31-Exhaust pipe, 32-Liquid supply pipe, 33-Return air pipe. Detailed Implementation

[0030] To facilitate a clear understanding of the technical means, creative features, objectives, and effects of this invention, the invention will be further described below in conjunction with specific embodiments.

[0031] Example 1 Figures 1-7 As shown, an integrated operating room air conditioning system 21 includes a fresh air handling unit 1, an integrated clean room unit 2, and an automatic control system. The integrated clean room unit 2 includes at least one operating room 21, and each operating room 21 is equipped with a recirculating air handling system 22. The recirculating air handling system 22 includes a return air vent 221, a recirculating air duct 222, a filter unit 223, a temperature-regulating coil 224, a circulating fan 225, and a supply air unit 226. The return air vent 221 is connected to the recirculating air duct 222. The filter unit 223, the temperature-regulating coil 224, and the circulating fan 225 are arranged sequentially within the recirculating air duct 222, which is connected to the supply air unit 226 to form a closed-loop airflow. The fresh air handling unit 1 is connected to the integrated clean room unit 2 and is used to supply treated fresh air to the operating room 21. The automatic control system is connected to the fresh air handling unit 1, the temperature-regulating coil 224, and the circulating fan 225. The fresh air handling unit 1 is used to process the humidity of fresh air and maintain the pressure environment of the operating room 21, while the circulating air handling system 22 is used to filter and regulate the temperature of the indoor circulating air.

[0032] Fresh air handling unit 1 is a box-type unit with a rectangular, sealed casing. (Refer to...) Figure 2 Each functional section is equipped with a primary filter 11, a medium-efficiency filter 12, a sub-high-efficiency filter 121, a surface cooler 13, an evaporator 14, a condenser 15, a heater 16, a reversible heat exchanger 17, and a humidifier 18.

[0033] To provide an independent power source for each of the aforementioned heat exchangers and form a closed heat pump cycle, the fresh air handling unit 1 is also equipped with an equipment chamber independent of the main airflow channel. The equipment chamber houses a compressor 19, a throttling device, and a four-way reversing valve for switching operating conditions. The compressor 19, throttling device, and four-way reversing valve are connected via refrigerant piping, evaporator 14, condenser 15, and reversible heat exchanger 17, together forming a direct expansion refrigerant circulation system.

[0034] In this embodiment, the fresh air unit 1 has a cooling season operation mode and a heating season operation mode.

[0035] In the cooling season operation mode.

[0036] The airflow path is as follows: Outdoor fresh air enters the unit through the air inlet, first passing through the pre-filter 11, medium-efficiency filter 12, and sub-high-efficiency filter 121 to remove particulate matter. Then, the air enters the surface cooler 13 for pre-cooling and sensible heat reduction, followed by deep latent heat dehumidification in the evaporator 14, resulting in the precipitation of a large amount of condensate. The dehumidified, low-temperature, low-humidity air continues to flow through the reversible heat exchanger 17, which operates as a condenser, utilizing the condensation heat of the refrigerant to reheat the air at the same humidity level to prevent the supply air from being too cold. Finally, the air, having reached a suitable temperature and humidity, is delivered to the integrated clean room unit 2 via the air supply section.

[0037] The refrigerant circulation path is as follows: the high-temperature and high-pressure gaseous refrigerant discharged from the compressor 19 first enters the reversible heat exchanger 17 through the four-way reversing valve to release condensation heat, which heats the air and the refrigerant itself condenses into a high-pressure liquid; then, the high-pressure liquid refrigerant is depressurized through the throttling device to become a low-temperature and low-pressure gas-liquid two-phase mixture, which enters the evaporator 14 to absorb heat from the air, which cools and dehumidifies the air, and the refrigerant is completely vaporized into a low-pressure gas; finally, the low-pressure gaseous refrigerant is drawn back into the compressor 19 through the refrigerant return pipeline, completing the refrigeration reheat cycle.

[0038] Operating mode during the heating season.

[0039] The air path is as follows: In winter, fresh outdoor air enters the unit and, after passing through three stages of filtration, first enters the condenser 15 for preheating, then enters the heater 16 for secondary heating to quickly increase the supply air temperature. The heated air then passes through the humidifier 18 for clean steam humidification to meet humidity requirements, and finally flows through the reversible heat exchanger 17. At this time, the reversible heat exchanger 17 operates as an evaporator, and the air temperature is corrected and fine-tuned by controlling the refrigerant evaporation rate before being delivered through the air supply section.

[0040] The refrigerant circulation path is as follows: the high-temperature and high-pressure gaseous refrigerant discharged from the compressor 19 enters the condenser 15 after being switched by the four-way reversing valve to release heat. At this time, the winter fresh air is preheated and the refrigerant condenses into liquid. Subsequently, the liquid refrigerant enters the reversible heat exchanger 17 after being depressurized by the throttling device. In it, it absorbs heat from the air side and completely vaporizes. The vaporized low-pressure refrigerant gas finally flows back to the suction port of the compressor 19 to complete the heating cycle.

[0041] In this embodiment, refrigerant circulation is common knowledge in the field of air conditioning technology and is now widely used in air conditioning equipment, so it will not be described in detail here.

[0042] After entering the unit through the air inlet, the fresh air first passes through the pre-filter 11, the medium-efficiency filter 12, and the sub-high-efficiency filter 121 in sequence. The pre-filter 11 is a plate or pleated filter structure used to intercept large particulate pollutants. The medium-efficiency filter 12 and the sub-high-efficiency filter 121 are used to further filter fine particulate matter and reduce the pollution load of the subsequent heat exchanger. The filtered fresh air enters the surface cooler 13 for pre-cooling treatment. The surface cooler 13 uses a refrigerant to cool the fresh air with sensible heat and cause some water vapor to condense and precipitate. Then the air enters the evaporator 14 for deep dehumidification treatment to further reduce the moisture content. The dehumidified air enters the reversible heat exchanger 17. Under cooling conditions, the reversible heat exchanger 17 operates as a condenser to reheat the low-temperature and low-humidity air to avoid overcooling of the supply air and reduce reheat energy consumption. The treated air is output through the air supply section and sent to the integrated clean room unit 2.

[0043] In this embodiment, a water collection tray is provided below both the surface cooler 13 and the evaporator 14 of the fresh air handling unit 1. The bottom surface of the water collection tray is inclined at a certain angle, and a drain outlet is opened at its lowest point, which is connected to the condensate drain main pipe outside the unit. Since there is usually a pressure difference between the inside and outside of the fresh air handling unit 1 during fan operation, a U-shaped water trap is provided on the condensate drain main pipe to form an effective water seal in order to prevent condensate from failing to drain, internal air leakage, or backflow of unpurified external air. In heating mode, the fresh air is preheated by passing through the condenser 15, then reheated by the heater 16 to increase the supply air temperature, and then enters the humidifier 18 to humidify the heated fresh air with steam to meet the indoor humidity requirements. The reversible heat exchanger 17 operates as an evaporator in this mode to correct the air temperature, and finally is delivered to the integrated clean room unit 2 through the air supply section.

[0044] The humidifier 18 is preferably one of an electrode-type steam humidifier, an electric heating steam humidifier, or a dry steam humidifier. The humidifier 18 includes a steam generating component located outside the air conditioning unit. The clean steam produced by the humidifier is sent out through the steam distribution nozzle inside the air conditioning unit and is fully mixed with the airflow of the unit to complete the air humidification process.

[0045] The fresh air unit 1 is connected to the air supply unit 226 on the top of the operating room 21 through the air supply duct. It is used to provide the operating room 21 with humidity-controlled fresh air. At the same time, it maintains the positive pressure environment in the room by controlling the fresh air supply volume. Thus, the fresh air unit 1 mainly undertakes the functions of humidity control and pressure compensation, while temperature regulation is mainly completed by the indoor circulation system.

[0046] The integrated clean room unit 2 is a prefabricated clean room module. Its overall structure is a cuboid or rectangular box. It consists of a bottom plate, a top plate, and side wall enclosures, forming multiple independent operating rooms 21. Each operating room 21 is separated by partition walls to form an independent clean space. Each operating room 21 is equipped with an independent circulating air handling system 22 to achieve independent adjustment of temperature, humidity, and pressure difference in different operating rooms 21.

[0047] Each operating room 21 is equipped with an air supply unit 226 at the top. The air supply unit 226 is preferably a panel or frame-type air supply ceiling. A static pressure equalization chamber is formed between the air supply ceiling and the top plate. The lower surface of the air supply ceiling forms a clean air supply surface. Multiple air outlets are evenly distributed on the air supply surface, so that air is evenly delivered from the top into the surgical area to form a clean airflow that flows vertically downward.

[0048] The operating room 21 has return air inlets 221 on both sides of the lower part. The return air inlets 221 are connected to the circulating air ducts 222 located inside the side wall sandwich to form a return air path. The circulating air ducts 222 are plate sandwich air duct structures extending along the side wall. They are divided into return air section, filtration section, heat exchange section and air supply section. The air is circulated and processed in the air duct.

[0049] Reference Figure 4 Indoor air enters the circulating air duct 222 from the return air vent 221, passes through the filter unit 223, the temperature regulating coil 224 and the circulating fan 225 in sequence, and then returns to the operating room 21 through the air supply unit 226 to form a circulating airflow. The fresh air unit 1 can provide fresh air to the operating room 21.

[0050] The filter unit 223 is a filter section located in the circulating air duct 222. It adopts a plate or box filter module and is installed in a detachable frame to remove larger particles and suspended particles in the return air, thereby reducing the pollution load of the circulating air. At the same time, a high-efficiency filter is installed at the supply air ceiling for terminal fine filtration.

[0051] The temperature-regulating coil 224 is located in the heat exchange section of the circulating air duct 222. It is a finned coil structure that supplies cooling or heating through a cold or heat source system to perform sensible heat exchange on the circulating air. It lowers the indoor temperature in cooling mode and raises the indoor temperature in heating mode.

[0052] Reference Figure 4 Furthermore, the temperature-regulating coil 224 can be pre-embedded inside the side wall of the circulating air duct 222 near the operating room 21. This allows for convective heat exchange between the temperature-regulating coil 224 and the circulating air within the circulating air duct 222, as well as radiative heat exchange with the indoor environment through the inner wall of the duct. This effectively simplifies the production and installation process of the integrated operating room 21 and facilitates product standardization. Even further, on the side of the circulating air duct 222 where the temperature-regulating coil 224 is pre-embedded, enhanced convective heat exchange technology is employed, including the installation of heat dissipation fins; on the side of the pre-embedded temperature-regulating coil 224 near the operating room 21, enhanced radiative heat exchange technology is employed, including the installation of a high-radiation-efficiency coating, to further improve the overall heat exchange efficiency.

[0053] In this embodiment, a water collection tray and a water guide channel are also provided at the bottom of the temperature regulating coil 224 inside the circulating air duct 222. Specifically, for the temperature regulating coil 224 embedded inside the building envelope, its water collection tray is concealed at the bottom of the side wall air duct, and the drain outlet of the water collection tray is connected to a pre-embedded branch pipe for condensate. This pre-embedded branch pipe extends downward along the interlayer of the building envelope and eventually flows into the condensate main pipe or the building's main drainage network.

[0054] The circulating fan 225 is installed in the fan section of the circulating air duct 222. It is a centrifugal or axial flow type. The circulating air volume is controlled by frequency conversion speed regulation, so that the air continuously circulates in the return air, filtration, heat exchange and supply air paths, thereby ensuring the stability of the clean airflow organization.

[0055] The integrated clean room unit 2 is mainly responsible for indoor temperature regulation and clean air circulation, and achieves continuous indoor air purification and temperature maintenance through the circulating air system.

[0056] The temperature-regulating coil 224 is supplied with cooling or heating energy through a cold / heat source system. In this embodiment, the cold / heat source system adopts a VRV system 3, which includes an outdoor unit, cooling piping, heating piping, a branching assembly, and connecting pipes leading to the temperature-regulating coil 224 of each operating room 21. The branching assembly can deliver cooling or heating energy to multiple operating rooms 21 separately, allowing each operating room 21 to operate independently according to its own load requirements.

[0057] When multiple operating rooms 21 are operating simultaneously, the VRV system 3 can provide cooling or heating to different operating rooms 21 respectively, thereby achieving asynchronous cooling and heating supply. Specifically, when one operating room 21 is in a cooling demand state, its corresponding temperature control coil 224 receives cooling energy for cooling; while when another operating room 21 is in a heating demand state, its corresponding temperature control coil 224 receives heat energy for heating. This achieves independent and precise adjustment between different rooms, fundamentally reducing the phenomenon of mutual cancellation of cooling and heating loads, and significantly improving the overall energy utilization efficiency of the system.

[0058] Specifically, to achieve the aforementioned asynchronous cooling and heating supply, the VRV system 3 adopts a three-pipe architecture, whose piping system includes an exhaust pipe 31, a liquid supply pipe 32, and a return pipe 33. The exhaust pipe 31, liquid supply pipe 32, and return pipe 33 are all connected to the temperature control coils 224 of each operating room 21 via a mode switching device and connecting pipes. In cooling mode, the temperature control coil 224 acts as an evaporator, where the refrigerant flows in from the liquid supply pipe 32, evaporates and absorbs heat after being throttled and depressurized, and then returns to the outdoor unit via the return pipe 33. In heating mode, the temperature control coil 224 acts as a condenser, where the high-temperature, high-pressure gaseous refrigerant from the exhaust pipe 31 releases heat within the coil, and the condensed liquid refrigerant returns via the liquid supply pipe 32. Independent regulation is achieved through this pipeline switching.

[0059] In this embodiment, the VRV system 3 is common knowledge in the field of HVAC technology and is now widely used in scenarios such as central air conditioning, so it will not be described in detail here.

[0060] The temperature-regulating coil 224 is preferably installed within the circulating air duct 222, allowing the outer surface of the coil to directly contact the circulating air for convective heat transfer. Further, as a more preferred embodiment, the temperature-regulating coil 224 can be pre-embedded within the enclosure structure forming the circulating air duct 222. The temperature-regulating coil 224 is arranged close to the inner wall of the circulating air duct 222, and the inner wall of the duct is made of a metal layer or composite heat exchange layer with excellent thermal conductivity. Based on this pre-embedded structure, the temperature-regulating coil 224 can not only form efficient convective heat transfer with the air flowing within the duct, but also form uniform radiative heat transfer with the internal environment of the operating room 21 through the surface temperature changes of the inner wall panel, thereby effectively improving the uniformity of temperature regulation and human comfort within the operating room 21, while also simplifying the on-site installation process.

[0061] The automatic control system includes a temperature sensor, a humidity sensor, and a differential pressure sensor. The temperature sensor collects indoor air temperature; the humidity sensor collects indoor relative humidity; and the differential pressure sensor detects the pressure difference between the operating room 21 and adjacent areas. The automatic control system uses the collected parameters to coordinate the control of the fresh air handling unit 1, the circulating fan 225, and the heating and cooling source system. When the indoor temperature is higher than the set value, the automatic control system increases the cooling output of the temperature regulating coil 224; when the indoor temperature is lower than the set value, it increases the heating output of the temperature regulating coil 224. When the indoor humidity is high, the fresh air handling unit 1 enhances the dehumidification capacity of the dehumidification section; when the indoor humidity is low, the humidifier 18 is activated for humidification. When the differential pressure deviates from the set range, the system maintains the set differential pressure by adjusting the fresh air supply volume, the circulating air volume, and the room's airflow balance, thereby ensuring that the operating room 21 maintains a stable clean pressure environment.

[0062] In this embodiment, when the system is running, fresh air first enters the fresh air unit 1, and undergoes three-stage purification through the primary filter 11, the medium-efficiency filter 12, and the sub-high-efficiency filter 121. Then, depending on the season and operating conditions, it enters different processing units.

[0063] The condenser 15 is used to preheat the fresh air, the heater 16 is used to heat the supply air, the surface cooler 13 is used to pre-cool the fresh air in summer, the evaporator 14 is used to deeply dehumidify the fresh air in summer, and the reversible heat exchanger operates as the condenser 15 in the cooling season to reheat the dehumidified air, and operates as the evaporator 14 in the heating season to cool and correct the supply air, thereby realizing energy regulation and coordinated control of temperature and humidity under cooling and heating conditions.

[0064] The fresh air supplied to operating room 21 works in conjunction with the recirculated air within operating room 21 to maintain the required temperature, humidity, and pressure environment. Indoor air enters the recirculation duct 222 from the return air vent 221 under the action of the recirculation fan 225. It passes through the filter unit 223 to remove recirculated particulate matter, then undergoes temperature correction by the temperature control coil 224, and is subsequently delivered to the supply air ceiling by the recirculation fan 225. After passing through the high-efficiency filter on the supply air ceiling, the air is delivered to the surgical area in a relatively uniform manner, forming a stable clean airflow pattern. This airflow pattern can promptly remove suspended particles from the critical operating area and recycle them through the lower return air vent 221, thus forming a closed-loop circulation.

[0065] Since the fresh air handling unit 1 is mainly responsible for humidity control and pressure compensation, and the integrated clean room unit 2 is mainly responsible for temperature regulation and clean air circulation, temperature, humidity, and cleanliness are each handled by different structures, with a clear division of functions. This not only reduces the space occupied by the traditional clean operating room air handling unit 21, but also makes the air handling process more modular, facilitating assembly, maintenance, and standardized production.

[0066] In this embodiment, an exhaust fan is installed in the operating room 21 to ensure a stable air pressure difference within the operating room 21.

[0067] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and various changes and modifications can be made without departing from the spirit and scope of the invention, all of which fall within the scope of protection claimed by the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An integrated operating room air conditioning system, Its features are: This includes fresh air handling units, integrated clean room units, and automatic control systems; The integrated clean room unit includes at least one operating room, and each operating room is equipped with a recirculating air handling system; The circulating air handling system includes a return air inlet, a circulating air duct, a filter unit, a temperature control coil, a circulating fan, and an air supply unit. The return air inlet is connected to the circulating air duct, the filter unit, the temperature regulating coil and the circulating fan are installed in the circulating air duct, and the circulating air duct is connected to the air supply unit to form a circulating air path; The fresh air unit is connected to the integrated clean room unit and is used to deliver treated fresh air to the operating room; The automatic control system is connected to the fresh air handling unit, the temperature control coil and the circulating fan respectively; The fresh air handling unit is used to process the humidity of the fresh air and maintain the pressure environment of the operating room, while the circulating air handling system is used to filter and regulate the temperature of the indoor circulating air.

2. The integrated operating room air conditioning system according to claim 1, characterized in that: The air supply unit is an air supply ceiling installed at the top of the operating room; the air outlet of the air supply ceiling is equipped with a high-efficiency filter.

3. The integrated operating room air conditioning system according to claim 1, characterized in that: The return air vents are located at the bottom of both sides of the operating room, and the circulating air ducts are located inside the side walls of the operating room. Indoor air enters the circulating air duct through the return air inlet, passes through the filter unit, temperature control coil and circulating fan in sequence, and is then sent back to the operating room through the air supply unit to form a circulating airflow.

4. The integrated operating room air conditioning system according to claim 1, characterized in that: The fresh air handling unit includes a pre-filter, a medium-efficiency filter, a sub-high-efficiency filter, a surface cooler, an evaporator, a condenser, a heater, a reversible heat exchanger, a humidifier, and a compressor.

5. The integrated operating room air conditioning system according to claim 4, characterized in that: The humidifier is a steam humidifier. The steam humidifier is one of the following: an electrode-type steam humidifier, an electric heating steam humidifier, or a dry steam humidifier.

6. The integrated operating room air conditioning system according to claim 4, characterized in that: In the cooling season operation mode, the fresh air unit uses a surface cooler to pre-cool the fresh air, an evaporator to deeply dehumidify the fresh air, and a reversible heat exchanger to act as a condenser to reheat the dehumidified air. In the heating season operation mode, the fresh air handling unit uses a condenser to preheat the fresh air, a heater to heat the supply air, a reversible heat exchanger to cool the supply air, and a humidifier to humidify the supply air.

7. The integrated operating room air conditioning system according to claim 1, characterized in that: It also includes a cold and heat source system, which is connected to the temperature control coil and is used to provide cooling or heating to the temperature control coil; The cold and heat source system adopts a VRV system; The VRV system is connected to temperature control coils corresponding to multiple operating rooms, and is used to provide asynchronous heating and cooling to multiple operating rooms.

8. The integrated operating room air conditioning system according to claim 1, characterized in that: The automatic control system includes a temperature sensor, a humidity sensor, and a differential pressure sensor; The automatic control system performs coordinated control of the fresh air unit, circulating fan, and cold and heat source system based on parameters collected by temperature sensors, humidity sensors, and differential pressure sensors.

9. The integrated operating room air conditioning system according to claim 1, characterized in that: The filtration unit includes a medium-efficiency filter installed in the circulating air duct; The temperature regulating coil adopts a coil-type heat exchanger, which is installed in the circulating air duct and forms convective heat exchange with the circulating air.

10. The integrated operating room air conditioning system according to claim 7, characterized in that: The temperature-regulating coil uses a radiative convection heat exchanger, which is pre-embedded inside the enclosure structure that forms the circulating air duct, and exchanges radiative heat with the internal environment of the operating room through the inner wall of the circulating air duct.

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