Fresh air conditioning system for clean operating rooms with different areas and control method

Abstract

The invention provides a fresh air conditioning system for clean operating rooms with different areas and a control method, and belongs to the technical field of medical air conditioners, the fresh air conditioning system comprises a fresh air conditioning unit and an operating room, the fresh air conditioning unit is arranged outside the operating room, and a control unit is arranged at the position of the fresh air conditioning unit; a multi-stage air supply unit is communicated between the output end of the fresh air conditioning unit and the operating room, and a multi-stage air return unit is communicated between the input end of the fresh air conditioning unit and the operating room; external air is fed into a fresh air conditioning unit, then an electric air valve is opened to convey mixed air to an operating room, meanwhile, the indoor temperature is monitored, and the electric air valve is adjusted to reach the set temperature through a two-stage regulation and control method; and return air flows back to the fresh air conditioning unit through the return air main pipeline to finish circulation. The problems that the temperature of an air outlet is too low when a single convection air conditioner is used in the clean operating room to independently reduce the indoor thermal load, and the temperature control capacity of the clean operating room with the large area is reduced after a radiation air conditioning unit is additionally arranged are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical air conditioning, and in particular to a fresh air air conditioning system and a control method for clean operating rooms of different areas. Background Art

[0002] Clean operating rooms have strict requirements on environmental indicators such as temperature, humidity, and cleanliness, and the operating area must be in the mainstream area of ​​clean airflow, that is, the air outlet of the air conditioning unit is usually set above the operating table. In a convection air conditioning refrigeration environment, cold air is used to remove the indoor heat load. Due to the low temperature of the air outlet, the surgeon, nurses, and patients in the operating area are in a low ambient temperature, which is not conducive to the doctor's surgery and the patient also faces a certain risk of hypothermia.

[0003] At present, some clean operating rooms use an air handling system that combines fresh air treatment air conditioning units with radiation air conditioning. The air supply outlet is arranged in the middle of the operating room ceiling to provide humidity and cleanliness in the operating room. By installing radiation panels on the inner side of the operating room wall, the temperature in the operating room is changed by radiation heat exchange and convection heat exchange, so that surgeons, patients, etc. can be in a relatively suitable environment without affecting the humidity and cleanliness in the operating room. The radiation panels used in clean operating rooms mostly use gas as the heat exchange medium. The gas is heated or cooled by the radiation air conditioning unit. The treated gas is passed into the air supply main duct and diverted to the air inlet of the cavity radiation panel placed in the wall. After heat exchange with the panel, it flows out from the bottom outlet of the radiation panel and gathers into the return air main duct, which is a cycle.

[0004] However, the prior art uses radiation air conditioners and radiation panels to adjust the temperature of clean operating rooms, but there are still the following problems:

[0005] 1. The wall radiation panel has poor cooling or heating capabilities for radiation objects that are far away, which will cause the local temperature in the operating room to be too high or too low; increasing the air intake to enhance its radiation heat exchange capacity has limited effect and will bring unnecessary energy consumption.

[0006] 2. Clean operating rooms with a large wall radiation panel adjustment area take a long time to reach the set temperature, which is not conducive to the development and progress of surgery. Summary of the invention

[0007] In order to overcome the shortcomings of the prior art, the purpose of the present invention is to provide a fresh air air conditioning system and a control method for clean operating rooms of different areas, which solves the problem that the air outlet temperature is too low when the clean operating room uses a single convection air conditioner to reduce the indoor heat load, and the temperature control ability of the clean operating room with a larger area is reduced after the radiation air conditioning unit is added, and a two-stage control method is used to achieve temperature uniformity in the clean operating room.

[0008] To achieve the above object, the present invention provides the following solutions:

[0009] A fresh air air conditioning system for clean operating rooms of different areas comprises a fresh air air conditioning unit and an operating room, wherein the fresh air air conditioning unit is arranged outside the operating room, a control unit is arranged at the position of the fresh air air conditioning unit, a multi-stage air supply unit is connected between the output end of the fresh air air conditioning unit and the operating room, and a multi-stage return air unit is connected between the input end of the fresh air air conditioning unit and the operating room.

[0010] Preferably, the multi-stage air supply unit is composed of a main air supply duct and a plurality of air supply duct branch pipes, the air supply duct branch pipes include a primary air supply pipe, a secondary air supply pipe and a tertiary air supply pipe, the primary air supply pipe, the secondary air supply pipe and the tertiary air supply pipe are all connected to the main air supply duct, and the main air supply duct is connected to the fresh air air conditioning unit.

[0011] Preferably, a central air supply outlet is opened in the middle of the ceiling of the operating room, a high-efficiency filter is arranged above the central air supply outlet, a first sensor is arranged at one end of the high-efficiency filter, the high-efficiency filter is communicated with the first-level air supply duct, and a first electric air valve is arranged between the first-level air supply duct and the high-efficiency filter for regulating the amount of fresh air entering the operating room.

[0012] Preferably, a second electric air valve is provided on the main pipeline of the secondary air supply duct, and two branch pipelines are provided at the bottom of the second electric air valve. The two branch pipelines are respectively connected to the two side walls of the operating room, and hollow radiation panels are provided inside the walls of the operating room. The hollow radiation panels are respectively connected to the corresponding branch pipelines through air supply valves.

[0013] Preferably, four groups of first air supply outlets are opened at the four corners of the ceiling of the operating room, second sensors are arranged at the positions of the four groups of first air supply outlets, the four groups of first air supply outlets are connected to the three-level air supply ducts, third electric air valves are arranged between the three-level air supply ducts and the four groups of first air supply outlets, and the third electric air valve has the same function as the first electric air valve.

[0014] Preferably, a third sensor is also provided inside the operating room, and the third sensor, the first sensor and the second sensor are all connected to the control unit, the control unit includes a main controller and a sub-controller, the main controller is connected to the sub-controller, the sub-controller is connected to the fresh air air-conditioning unit, and the main controller is also connected to an air valve controller for regulating the air valves of various parts in the system.

[0015] Preferably, the fresh air air conditioning unit consists of a surface cold end, a heating end and a regulating fan, and the surface cold end, the heating end and the regulating fan are all connected to the sub-controller for regulating the mixed air temperature and flow of the fresh air air conditioning unit.

[0016] Preferably, the multi-stage return air unit consists of a return air main duct and a number of return air duct branch pipes, and the several return air duct branch pipes are respectively connected to the return air ducts arranged on the walls of the operating room, and the several return air ducts are all connected to the return air main duct, and the return air main duct is connected to the fresh air air-conditioning unit.

[0017] The present invention also provides a control method for a fresh air air conditioning system for clean operating rooms of different areas, comprising the following steps:

[0018] S1. According to the indoor environmental temperature, humidity and cleanliness requirements of the clean operating room, the external ambient air is sent into the fresh air air conditioning unit, mixed with the return air, and the mixed air after primary filtration, temperature and humidity treatment machine, and secondary filtration is sent into the main air supply duct;

[0019] S2, regulating the air valve controller through the main controller to control the first electric air valve to open, deliver mixed air to the operating room through the central air supply port, and ensure that the air volume of the central air supply port reaches the minimum fresh air volume required by the operating room;

[0020] S3, by regulating the air valve controller, controlling the second electric air valve to open, and regulating the air supply valve at the hollow radiation panel, gradually increasing the air volume of the hollow radiation panel in the wall until the rated air intake volume is reached;

[0021] S4, monitoring the ambient temperature change in the operating room through the third sensor, setting the monitoring time interval and temperature, judging whether it is necessary to open the third electric air valve, so as to gradually increase the air supply flow rate of the first air supply port to ensure that the operating room reaches the set temperature, thereby realizing the temperature control in the operating room;

[0022] S5. After the air supply in the operating room is completed, the return air in the operating room is mixed with the return air of the hollow radiation panel through the return air duct, and is collected to the return air main duct through the return air duct branch pipe, and then flows back to the fresh air air conditioning unit to complete the cycle.

[0023] Preferably, in said S4, it specifically includes:

[0024] If the temperature in the operating room does not reach the set temperature, the third electric air valve is opened, and the air supply temperature, pressure, cleanliness and humidity of the first air supply outlet are monitored by the second sensor. Then, the third electric air valve is controlled by PID to gradually increase the air supply flow rate of the first air supply outlet until the temperature in the operating room reaches the set temperature and the air supply working conditions of each air supply position are maintained;

[0025] If the temperature in the operating room has reached the set temperature, the third electric air valve will not be opened, and the current air supply conditions at each air supply position will be maintained to achieve temperature control in the operating room.

[0026] According to the specific embodiments provided by the present invention, the present invention discloses the following technical effects:

[0027] The present invention provides a fresh air air conditioning system and a control method for clean operating rooms of different areas. The fresh air air conditioning unit is used to provide purified air and radiation panel air volume, and the radiation air conditioning unit is omitted, thereby reducing the power consumption and initial investment cost of the air conditioning unit used in the operating room; and through the control of the main controller, firstly, it is ensured that the minimum fresh air volume, cleanliness and humidity of the central air supply outlet of the ceiling meet the requirements, and at the same time, the hollow radiation panel in the wall is used to change the indoor environmental temperature. If the temperature near the operating area does not reach the set temperature range within the set time, the first air supply outlets at the four corners of the ceiling are opened, and the two-stage control of the radiation panel and the air supply at the four corners of the ceiling is used to accelerate the change of the environmental temperature in the operating room. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 This is a layout diagram of a fresh air air conditioning system for clean operating rooms of different areas according to the present invention;

[0030] Figure 2 A diagram showing the location of air outlets on the ceiling of a clean operating room provided in the first embodiment of the present invention;

[0031] Figure 3 A flow chart of a control method provided in Embodiment 1 of the present invention;

[0032] Figure 4 A schematic diagram of a control method provided in Embodiment 1 of the present invention;

[0033] Description of reference numerals:

[0034] 1. Fresh air air conditioning unit; 2. Cold end; 3. Heating end; 4. Control fan; 5. Main air supply duct; 6. First-level air supply duct; 7. Second-level air supply duct; 8. Third-level air supply duct; 9. First electric air valve; 10. High-efficiency filter; 11. Central air supply outlet; 12. First sensor; 13. Second electric air valve; 14. Hollow radiation panel; 15. Air supply valve; 16. First air supply outlet; 17. Second sensor; 18. Third electric air valve; 19. Third sensor; 20. Main controller; 21. Sub-controller; 22. Main return air duct; 23. Return air duct. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] Embodiment 1

[0038] like Figure 1 As shown, the present invention provides a fresh air air conditioning system for clean operating rooms of different areas, including a fresh air air conditioning unit 1 and an operating room, wherein the fresh air air conditioning unit 1 is arranged outside the operating room, and a control unit is arranged at the position of the fresh air air conditioning unit 1 for controlling the entire system; a multi-stage air supply unit is connected between the output end of the fresh air air conditioning unit 1 and the operating room, and a multi-stage return air unit is connected between the input end of the fresh air air conditioning unit 1 and the operating room.

[0039] The multi-stage air supply unit is composed of a main air supply duct 5 and a plurality of branch air supply ducts, the branch air supply ducts include a primary air supply duct 6, a secondary air supply duct 7 and a tertiary air supply duct 8, the primary air supply duct 6, the secondary air supply duct 7 and the tertiary air supply duct 8 are all connected to the main air supply duct 5, the main air supply duct 5 is connected to the fresh air air conditioning unit 1, and is used to deliver mixed air to the operating room. A central air supply port 11 is provided in the middle of the ceiling of the operating room, a high efficiency filter 10 is provided above the central air supply port 11, a first sensor 12 is provided at one end of the high efficiency filter 10, the high efficiency filter 10 is connected to the primary air supply duct 6, and a first electric air valve 9 is provided between the primary air supply duct 6 and the high efficiency filter 10, which is used to control the amount of fresh air entering the operating room.

[0040] A second electric air valve 13 is arranged on the main pipeline of the secondary air supply pipe 7, and two branch pipelines are arranged at the bottom of the second electric air valve 13. The two branch pipelines are respectively connected to the two side walls of the operating room. Hollow radiation panels 14 are arranged inside the walls of the operating room, and the hollow radiation panels 14 are respectively connected to the corresponding branch pipelines through air supply valves 15.

[0041] Reference Figure 2 Four groups of first air supply ports 16 are provided at the four corners of the ceiling of the operating room. Second sensors 17 are provided at the positions of the four groups of first air supply ports 16. The four groups of first air supply ports 16 are connected to the three-level air supply pipe 8. A third electric air valve 18 is provided between the three-level air supply pipe 8 and the four groups of first air supply ports 16. The third electric air valve 18 has the same function as the first electric air valve 9. A third sensor 19 is also provided inside the operating room. The third sensor 19, the first sensor 12 and the second sensor 17 are all connected to the control unit. The control unit includes a main controller 20 and a sub-controller 21. The main controller 20 is connected to the sub-controller 21. The sub-controller 21 is connected to the fresh air air conditioning unit 1. The main controller 20 is also connected to a valve controller for regulating the air valves of various parts in the system.

[0042] In addition, the fresh air air conditioning unit 1 is composed of a surface cold end 2, a heating end 3 and a regulating fan 4. Of course, the fresh air air conditioning unit also includes a primary filter and a medium efficiency filter, which belong to the existing conventional technical means and have not been elaborated on in detail. The surface cold end 2, the heating end 3 and the regulating fan 4 are all connected to the sub-controller 21, which is used to adjust the mixed air temperature and flow of the fresh air air conditioning unit 1. The multi-stage return air unit is composed of a return air main duct 22 and a plurality of return air duct 23 branch pipelines. The plurality of return air duct 23 branch pipelines are respectively connected to the return air duct 23 arranged on the wall of the operating room. The plurality of return air ducts 23 are all connected to the return air main duct 22, and the return air main duct 22 is connected to the fresh air air conditioning unit 1.

[0043] Reference Figure 3 The control method of the fresh air air conditioning system comprises the following steps:

[0044] S1. According to the indoor environmental temperature, humidity and cleanliness requirements of the clean operating room, the external ambient air is sent into the fresh air air conditioning unit, mixed with the return air, and the mixed air after primary filtration, temperature and humidity treatment machine, and secondary filtration is sent into the main air supply duct;

[0045] S2, regulating the air valve controller through the main controller to control the first electric air valve to open, deliver mixed air to the operating room through the central air supply port, and ensure that the air volume of the central air supply port reaches the minimum fresh air volume required by the operating room;

[0046] S3, by regulating the air valve controller, controlling the second electric air valve to open, and regulating the air supply valve at the hollow radiation panel, gradually increasing the air volume of the hollow radiation panel in the wall until the rated air intake volume is reached;

[0047] S4, monitoring the ambient temperature change in the operating room through the third sensor, setting the monitoring time interval and temperature, judging whether it is necessary to open the third electric air valve, so as to gradually increase the air supply flow rate of the first air supply port to ensure that the operating room reaches the set temperature, thereby realizing the temperature control in the operating room;

[0048] Among them, in step S4, refer to Figure 4 Schematic diagram provided, T0 is the temperature of the surgical area, T s is the indoor set temperature, a is the allowable temperature fluctuation range, and time is the set time for changing the indoor temperature using only the hollow radiation panels in the wall; in this embodiment, the set time is 20 minutes. Specifically include:

[0049] (1) If the temperature in the operating room does not reach the set temperature (when |T s -T0|>a and time>20mins), the third electric air valve is opened, and the air supply temperature, pressure, cleanliness and humidity of the first air supply outlet are monitored by the second sensor. Then, the third electric air valve is controlled by PID to gradually increase the air supply flow rate of the first air supply outlet until the temperature in the operating room reaches the set temperature (i.e. |T s -T0|≤a), and maintain the current air supply conditions of each air supply position;

[0050] (2) If the temperature in the operating room has reached the set temperature (i.e., |T s -T0|≤a), the third electric air valve will not be opened, the current air supply conditions of each air supply position will be maintained, and the temperature in the operating room can be controlled.

[0051] S5. After the air supply in the operating room is completed, the return air in the operating room is mixed with the return air of the hollow radiation panel through the return air duct, and is collected to the return air main duct through the return air duct branch pipe, and then flows back to the fresh air air conditioning unit to complete the cycle.

[0052] Therefore, the above-mentioned fresh air air conditioning system and control method for clean operating rooms of different areas are adopted, and the fresh air air conditioning unit is used to provide purified air and radiation panel air volume, eliminating the radiation air conditioning unit, thereby reducing the power consumption and initial investment cost of the air conditioning unit used in the operating room; and through the main controller for regulation, first ensure that the minimum fresh air volume, cleanliness and humidity of the central air supply outlet of the ceiling meet the requirements, and at the same time use the hollow radiation panel in the wall to change the indoor ambient temperature. If the temperature near the operating area does not reach the set temperature range within the set time, the first air supply outlet at the four corners of the ceiling is opened, and the two-stage regulation of the radiation panel and the air supply at the four corners of the ceiling is used to accelerate the change of the ambient temperature in the operating room.

[0053] The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A fresh air conditioning system for clean operating rooms of different sizes, characterized in that: The invention comprises a fresh air air conditioning unit and an operating room, wherein the fresh air air conditioning unit is arranged outside the operating room, a control unit is arranged at the position of the fresh air air conditioning unit, a multi-stage air supply unit is connected between the output end of the fresh air air conditioning unit and the operating room, and a multi-stage return air unit is connected between the input end of the fresh air air conditioning unit and the operating room.

2. A fresh air air conditioning system for clean operating rooms of different sizes according to claim 1, characterized in that: The multi-stage air supply unit is composed of a main air supply duct and a plurality of air supply duct branch ducts, the air supply duct branch ducts include a primary air supply duct, a secondary air supply duct and a tertiary air supply duct, the primary air supply duct, the secondary air supply duct and the tertiary air supply duct are all connected to the main air supply duct, and the main air supply duct is connected to the fresh air air conditioning unit.

3. A fresh air air conditioning system for clean operating rooms of different sizes according to claim 2, characterized in that: A central air supply outlet is provided in the middle of the ceiling of the operating room, a high-efficiency filter is provided above the central air supply outlet, a first sensor is provided at one end of the high-efficiency filter, the high-efficiency filter is communicated with the primary air supply pipe, and a first electric air valve is provided between the primary air supply pipe and the high-efficiency filter for regulating the amount of fresh air entering the operating room.

4. A fresh air air conditioning system for clean operating rooms of different sizes according to claim 3, characterized in that: A second electric air valve is arranged on the main pipeline of the secondary air supply duct, and two branch pipelines are arranged at the bottom of the second electric air valve. The two branch pipelines are respectively connected to the two side walls of the operating room, and hollow radiation panels are arranged inside the walls of the operating room. The hollow radiation panels are respectively connected to the corresponding branch pipelines through air supply valves.

5. A fresh air air conditioning system for clean operating rooms of different sizes according to claim 4, characterized in that: Four groups of first air supply outlets are opened at the four corners of the ceiling of the operating room, second sensors are arranged at the positions of the four groups of first air supply outlets, the four groups of first air supply outlets are connected to the three-level air supply pipes, third electric air valves are arranged between the three-level air supply pipes and the four groups of first air supply outlets, and the third electric air valve has the same function as the first electric air valve.

6. A fresh air air conditioning system for clean operating rooms of different sizes according to claim 5, characterized in that: A third sensor is also provided inside the operating room. The third sensor, the first sensor and the second sensor are all connected to the control unit. The control unit includes a main controller and a sub-controller. The main controller is connected to the sub-controller, and the sub-controller is connected to the fresh air air-conditioning unit. The main controller is also connected to an air valve controller for regulating the air valves of various parts in the system.

7. A fresh air conditioning system for clean operating rooms of different sizes according to claim 6, characterized in that: The fresh air air conditioning unit is composed of a surface cold end, a heating end and a regulating fan. The surface cold end, the heating end and the regulating fan are all connected to the sub-controller for regulating the mixed air temperature and flow of the fresh air air conditioning unit.

8. The fresh air air conditioning system for clean operating rooms of different sizes according to claim 1 is characterized in that: The multi-stage return air unit consists of a return air main duct and a number of return air duct branch ducts, wherein the return air duct branch ducts are respectively connected to the return air ducts arranged on the walls of the operating room, and the return air ducts are all connected to the return air main duct, and the return air main duct is connected to the fresh air air conditioning unit.

9. A control method for a fresh air conditioning system for clean operating rooms of different areas according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1. According to the indoor environmental temperature, humidity and cleanliness requirements of the clean operating room, the external ambient air is sent into the fresh air air conditioning unit, mixed with the return air, and the mixed air after primary filtration, temperature and humidity treatment machine, and secondary filtration is sent into the main air supply duct; S2, regulating the air valve controller through the main controller to control the first electric air valve to open, deliver mixed air to the operating room through the central air supply port, and ensure that the air volume of the central air supply port reaches the minimum fresh air volume required by the operating room; S3, by regulating the air valve controller, controlling the second electric air valve to open, and regulating the air supply valve at the hollow radiation panel, gradually increasing the air volume of the hollow radiation panel in the wall until the rated air intake volume is reached; S4, monitoring the ambient temperature change in the operating room through the third sensor, setting the monitoring time interval and temperature, judging whether it is necessary to open the third electric air valve, so as to gradually increase the air supply flow rate of the first air supply port to ensure that the operating room reaches the set temperature, thereby realizing the temperature control in the operating room; S5. After the air supply in the operating room is completed, the return air in the operating room is mixed with the return air of the hollow radiation panel through the return air duct, and is collected to the return air main duct through the return air duct branch pipe, and then flows back to the fresh air air conditioning unit to complete the cycle.

10. The control method of the fresh air air conditioning system for clean operating rooms of different areas according to claim 9, characterized in that: In said S4, it specifically includes: If the temperature in the operating room does not reach the set temperature, the third electric air valve is opened, and the air supply temperature, pressure, cleanliness and humidity of the first air supply outlet are monitored by the second sensor. Then, the third electric air valve is controlled by PID to gradually increase the air supply flow rate of the first air supply outlet until the temperature in the operating room reaches the set temperature and the air supply working conditions of each air supply position are maintained; If the temperature in the operating room has reached the set temperature, the third electric air valve will not be opened, and the current air supply conditions of each air supply position will be maintained to achieve temperature control in the operating room.

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