VRF air conditioning system of hospital decoration and transformation project and construction technology of VRF air conditioning system

Abstract

The VRF air-conditioning system comprises a VRF air-conditioning system body, and the VRF air-conditioning system body comprises a water supply design platform, a drainage design platform, an air-conditioning engineering design platform, a heating and ventilation professional design platform and an air-conditioning energy-saving design platform; the water supply design platform is used for carrying out water supply design on water required by the VRF air conditioning system body; the drainage design platform is used for carrying out drainage design on water required by the VRF air conditioning system body; the air conditioner engineering design platform designs a cold source and a heat source of an air conditioner according to the load requirement of the VRF air conditioner system; the ventilation design platform is used for designing the ventilation quantity required by different mounting positions of the VRF air conditioning system; the ventilation design platform and the heating and ventilation professional platform are arranged to design the ventilation quantity required by different installation positions of the VRF air conditioning system and design wind prevention, air exhaust and fire protection related facilities, so that the ventilation quantity and the air conditioning load of the VRF air conditioning system meet the use requirements of people, and the practicability is high.

Description

Technical Field

[0001] The present invention relates to the technical field of VRF air conditioning systems, in particular to a VRF air conditioning system for a hospital renovation project and a construction process thereof. Background Art

[0002] The full name of VRF air-conditioning system is Variable Refrigerant Flow / Volume system, which is a variable refrigerant flow system. The system structure is similar to a split air conditioner. It uses one outdoor unit for each group of indoor units. The control technology uses variable frequency control. The speed of the scroll compressor in the outdoor unit is controlled according to the number of indoor units turned on to control the refrigerant flow. Compared with the full air system, full water system, and air-water system, the VRF air-conditioning system is flexible to use, easy to install, simple to manage and maintain, and the air-conditioning system operating cost is accurately calculated. It can better meet the user's personalized usage requirements, and the air-conditioning equipment occupies a relatively small building space, which can better meet the energy-saving requirements. This air-conditioning system has been widely used in buildings such as office buildings, villas and residential buildings.

[0003] Because of its advantages, people choose VRF air-conditioning system in hospital renovation projects, that is, an outdoor unit is installed outside the hospital building and connected to two or more indoor units through piping. The outdoor side adopts air-cooled heat exchange and the indoor side adopts direct evaporation heat exchange. One outdoor unit can transport refrigerant to several indoor units through pipelines. Each ward can be divided into systems according to independent indoor and outdoor units, and users can operate independently and start it at any time according to customer needs. Large wards do not need to charge energy fees to small wards, and small wards pay for air conditioning in the form of electricity bills.

[0004] However, traditional VRF air conditioning systems have the following disadvantages:

[0005] Outside the super high-rise hospital building, under extremely cold and hot outdoor climate conditions, the outdoor unit has a large attenuation and average operating stability. Summary of the invention

[0006] The purpose of the present invention is to provide a VRF air-conditioning system and its construction process for hospital renovation and reconstruction projects, so as to solve the problem raised in the above background technology that the outdoor unit has large attenuation and general operating stability under extremely cold and hot outdoor climate conditions outside a super high-rise hospital building.

[0007] To achieve the above-mentioned object, the present invention provides the following technical solutions: A VRF air conditioning system for hospital renovation and reconstruction projects, comprising a VRF air conditioning system body, wherein the VRF air conditioning system body comprises a water supply design platform, a drainage design platform, an air conditioning engineering design platform, a HVAC professional design platform and an air conditioning energy-saving design platform;

[0008] The water supply design platform performs water supply design for the water required by the VRF air conditioning system body;

[0009] The drainage design platform performs drainage design for the water required by the VRF air conditioning system body;

[0010] The air conditioning engineering design platform designs the cold source and heat source of the air conditioning according to the load demand of the VRF air conditioning system;

[0011] The ventilation design platform designs the ventilation volume required for different installation locations of the VRF air conditioning system;

[0012] The HVAC professional design platform designs windproof, exhaust and fire-fighting related facilities for the VRF air-conditioning system;

[0013] The air conditioning energy-saving design platform selects indoor design parameters according to the "Public Building Energy-Saving Design Standard", "Civil Building Heating, Ventilation and Air Conditioning Design Code" (GB50736-2012), and "General Hospital Building Design Code" (GB 51039-2014).

[0014] As a preferred technical solution of the present invention, the water supply design platform includes an indoor water supply design module, a drinking water design module and a hot water design module. The indoor water supply design module adopts a zoning system to supply water. The drinking water design module is supplied by a municipal water supply pipe to meet the living water demand of the entire hospital. The boiled water consumption is calculated at 2L / person / d. Each floor is equipped with a purified drinking water device. The hot water design module designs the hot water consumption and hot water supply respectively.

[0015] As a preferred technical solution of the present invention, the drainage design platform includes a drainage design module, an area design module and a pipe design module. The drainage design module sets the domestic sewage volume to 90% of its water supply, excluding water for greening irrigation and road sprinkling, which is about 356.0m 3 / d, the regional design module adopts rainwater and sewage separation system outdoors, sewage and waste separation indoors, fecal sewage is treated in septic tanks, and the treated sewage is discharged into the hospital sewage treatment station. After secondary biological treatment and disinfection, the pipe design module sets the drainage pipes. The pipe design module includes outdoor units and indoor units. The buried water supply pipes of the outdoor units adopt ductile iron water supply pipes and rubber ring socket joints. Domestic sewage pipes and rainwater pipes DN≤400 adopt UPVC reinforced pipes and rubber sealing ring socket joints; DN>400 adopts reinforced concrete drainage pipes and cement mortar joints. The water supply pipes of the indoor units and hot water mains adopt thin-walled stainless steel pipes, argon arc welding, and branch pipes adopt PPR pipes, hot-melt connections. Fire protection pipes DN≤100mm adopt hot-dip galvanized steel pipes, DN≤65mm, threaded connection; DN>65mm, clamp connection.

[0016] As a preferred technical solution of the present invention, the air conditioning engineering design platform includes an air conditioning load calculation module, an air conditioning cold source design module, an air conditioning heat source design module and an air cleanliness design module. The air conditioning load calculation module calculates the air conditioning load specifically as cold load and heat load. The air conditioning cold source design module designs the installation position of the air conditioning cold source and the working range of the cold source. The air conditioning heat source design module designs the installation position of the air conditioning heat source and the working range of the heat source. The air cleanliness design module installs an ion air purifier on the fresh air fan inlet duct and the air return duct of the air conditioning unit, and installs an ion air purifier at the return air outlet of the air conditioner at the end of the key room. An indoor air quality monitoring system is installed in the lobby of the outpatient building, which is linked with the ventilation system to adjust the air volume of the fresh air system and the exhaust system according to the concentration of carbon dioxide.

[0017] As a preferred technical solution of the present invention, the ventilation design platform includes a main room ventilation design module, a garage ventilation design module, a kitchen ventilation design module, a special room ventilation design module, an accident ventilation design module, a pipe ventilation design module and other ventilation design modules. The main room ventilation design module is for ventilation design of the main room. The basement parking garage of the garage ventilation design module is provided with a mechanical ventilation system. Under the joint action of the blower or natural air intake and the exhaust fan, the air in the parking garage forms an organized flow. The garage exhaust volume is calculated according to the dilution concentration method and the ventilation frequency of 6 times / hour to take the larger value, and the make-up air volume is 80% of the exhaust volume. The garage is provided with a CO concentration detection device, which is interlocked with the fan. The garage mechanical exhaust system also serves as a smoke exhaust system, and the garage air supply system also serves as a smoke exhaust and make-up air system. The kitchen ventilation design module is equipped with oil smoke after being treated by an electrostatic oil smoke purification device and discharged to the atmosphere, and the maximum allowable exhaust emission concentration is ≤2.0mg / m 3 , the efficiency of oil fume purification facilities is ≥85%, the fan and electrostatic oil fume purification device are installed on the roof, the exhaust system is set up according to the exhaust volume of 6 times / h during operation, and the emergency ventilation system is set up in the food processing room using gas, the exhaust volume is 12 times / h, and it is linked with the gas leakage alarm system. The emergency ventilator is set outdoors, and the make-up air volume is not less than 80% of the exhaust volume. The special room ventilation design module is equipped with a mechanical exhaust system for each ward isolation ward, and the difference between the exhaust volume and the fresh air volume of each room is not less than 150m 3 / h, the ward exhaust vents are respectively arranged in the bedside area and the lower side, and the exhaust vents of other rooms are located on the ceiling. The exhaust air is discharged by the roof exhaust fan through the exhaust duct. A high-efficiency filter is arranged at the exhaust vent. The manual control device of the accident ventilation design module is respectively arranged at the indoor and outdoor locations convenient for operation. The accident ventilator in the room using gas facilities adopts explosion-proof type and is provided with reliable anti-static grounding. The gas kitchen is provided with a gas leak detection system. When the gas concentration in the room exceeds the standard, the accident ventilator is turned on and the emergency shut-off valve of the gas supply pipeline is closed at the same time. The pipe ventilation design module designs various types of duct pipes and insulation thickness. The other ventilation design modules are public The bathroom is equipped with a mechanical exhaust system, and the exhaust volume is calculated based on the ventilation frequency of 15 times / hour. The drug store, laboratory, debridement, rescue and waiting rooms are equipped with mechanical exhaust systems, and the exhaust volume is calculated based on the ventilation frequency of 3 times / hour. The radiology room, nuclear medicine room and spare room are equipped with mechanical exhaust systems, and the exhaust volume is calculated based on the ventilation frequency of 6 times / hour. The outdoor exhaust vents are reasonably set according to the local dominant wind direction in winter and summer to effectively discharge indoor polluted gases and ensure that the air standards of the outdoor square meet environmental protection requirements. In addition to the mechanical ventilation system, the building itself also organizes effective natural ventilation methods to ensure indoor air quality at the lowest system operating cost.

[0018] As a preferred technical solution of the present invention, the HVAC professional design platform includes a smoke prevention design module, a smoke exhaust design module, a fire prevention design module and a smoke prevention and exhaust control module. The smoke prevention design module performs smoke prevention design on the VRF air-conditioning system, and the smoke exhaust design module performs smoke exhaust design on the VRF air-conditioning system. In addition to the indications on the drawings, the fire prevention design module is provided with fire dampers that automatically close at 70°C for ventilation and air-conditioning ducts in the following situations: a. The duct passes through the fire partition; b. The duct passes through the ventilation and air-conditioning room, floor, important or fire-hazardous room partition wall and floor; c. The horizontal pipe section where the vertical duct meets the horizontal duct on each floor; d. The duct passes through the fire damper At the partition wall of the door, and on both sides of the deformation joint of the fire separation, a fire damper that automatically closes at 150°C is installed at the place where the kitchen exhaust pipe passes through the firewall or fire partition. In addition to the indication on the drawings, smoke exhaust fire dampers are installed at the following locations of the exhaust pipe: a. On the horizontal pipe section where the vertical air duct meets the horizontal air duct on each floor; b. On the exhaust branch pipe of a smoke exhaust system that supports multiple smoke partitions; c. At the entrance of the smoke exhaust fan; d. At the place where it passes through the fire partition; The air ducts are made of non-combustible materials; the air duct insulation is made of non-combustible materials, and the air conditioning water pipe insulation is made of flame-retardant materials; the fire resistance limit of the horizontal pressurized air supply duct when it is set in the ceiling shall not be less than 0.5h, and the fire resistance limit when it is not set in the ceiling shall not be less than 1.0h; The fire resistance limit of the smoke exhaust duct shall not be less than 0.5h; when the horizontal smoke exhaust duct passes through the fire partition or is set in the corridor ceiling, or is not set in the ceiling, the fire resistance limit shall not be less than 1.0h, and the fire resistance limit of the horizontal smoke exhaust duct set in the ceiling of other places and the horizontal smoke exhaust duct in the garage shall not be less than 0.5h; the fire resistance limit of the air supply duct shall not be less than 0.5h, and the fire resistance limit of the air supply duct crossing the fire partition shall not be less than 1.5h; the above-mentioned ducts shall increase fire protection outside the galvanized steel plate duct, and refer to the practice in the national standard atlas 07K-103-2 to cover the galvanized steel plate duct with fiber reinforced silicate fireproof board; smoke, exhaust, heating, ventilation and air-conditioning ducts shall not pass through fireproof walls and floor slabs. The holes in the fire wall and the fire wall are sealed with fire-proof sealing materials; when the air duct passes through the fireproof partition wall, floor and fire wall, the fire damper and smoke exhaust fire damper on the air duct at the crossing point are used for the air duct within 2 meters on both sides. Fire-resistant air ducts or fire protection measures are taken on the outer wall of the air duct, and the fire resistance limit is not lower than the fire resistance limit of the fire partition; the inspection door of the water pipe well is a Class C fire door; the inspection door of the pressurized air supply pipe well and the fire exhaust pipe well is a Class B fire door; the water pipe well is separated by fire with non-combustible materials with a fire resistance limit of 1.5h on each floor slab; the gaps between the pipe well and the room and the corridor are filled with non-combustible materials, and the smoke and exhaust control module performs smoke and exhaust control on the VRF air-conditioning system.

[0019] As a preferred technical solution of the present invention, the smoke-proof design module includes a natural ventilation unit and a mechanical pressurized air supply unit. The natural ventilation unit adopts a closed stairwell and a smoke-proof stairwell with natural ventilation and smoke-proof method, and an openable external window opening with a total area of ​​not less than 2 m2 is set in every 5 floors of its outer wall, and the arrangement interval is not more than 3 floors; at the same time, an openable external window opening with an area of ​​not less than 1 m2 is set at its highest part; some closed stairwells that only serve the first underground floor have direct outdoor evacuation doors with an effective area of ​​not less than 1.2 m2 on the first floor; some closed stairwells that only serve the underground mezzanine and the first underground floor are equipped with openable external windows of not less than 2 m2 on the outer wall, and an openable external window with an area of ​​not less than 1 m2 is set at the highest part of the first floor; the area of ​​the openable external window opening of the independent vestibule and the fire elevator vestibule adopting natural ventilation and smoke-proof method is not less than 2 m2, and the area of ​​the openable external window opening of the shared vestibule adopting natural ventilation and smoke-proof method is not less than 3 m2; it is set at a high place not less than The external windows that are easy to open shall be provided with manual opening devices at a height of 1.3-1.5m from the ground. When the closed staircase, smoke-proof staircase, antechamber or shared antechamber adopts openable external windows for natural ventilation, the effective area of ​​the open external windows shall not be less than 1 / 3 of the openable external windows area. For the specific window positions and areas, please refer to the architectural and curtain wall design drawings and mechanical pressurized air supply units. The mechanical pressurized air supply unit shall be provided with a mechanical pressurized air supply system in the smoke-proof staircase that cannot adopt natural ventilation for smoke prevention, with a designed positive pressure value of 40-50Pa. The underground and ground sections of the staircase shall be provided with independent pressurized air supply systems respectively. An independent mechanical pressurized air supply system shall be provided for each section of the staircase divided into sections on the refuge floor. A mechanical pressurized air supply system shall be provided for the antechamber and shared antechamber that cannot adopt natural ventilation for smoke prevention, with a designed positive pressure value of 25-30Pa. A normally closed multi-leaf air supply outlet shall be provided on each floor. The air volume of the pressurized air supply system shall be calculated in accordance with the provisions of Article 3.4 of GB51251, and the air volume of the fan shall not be less than 1.2 times, the vertical service height of the pressurized air supply system is less than 100m; the fixed window setting of the stairwell of the pressurized air supply system is detailed in the architectural and curtain wall design drawings. The smoke exhaust design module includes a natural smoke exhaust facility unit and a mechanical smoke exhaust facility unit. The natural smoke exhaust facility unit cannot meet the natural smoke exhaust conditions. All smoke exhaust places that need to be exhausted adopt natural smoke exhaust; the natural smoke exhaust window is set on the top or outer wall of the smoke exhaust area; when it is set on the outer wall, the natural smoke exhaust window is within the smoke storage bin; for aisles or rooms with a clear indoor height of no more than 3m, the lower edge of the natural smoke exhaust window shall be no less than 1 / 2 of the indoor clear height from the indoor ground; the natural smoke exhaust window opens along the airflow direction of the fire smoke , and there is a device for easy opening; the window area that does not meet the above requirements shall not be included in the effective window area. When the room area is not more than 200㎡, the opening direction of the natural smoke exhaust window is not limited; the location and specifications of the natural smoke exhaust window are detailed in the architectural and curtain wall design drawings. Mechanical smoke exhaust facilities shall be installed in all smoke exhaust places where the mechanical smoke exhaust facility unit cannot meet the natural smoke exhaust conditions; the underground garage is designed with a mechanical smoke exhaust system that is used in conjunction with the normal exhaust system. The smoke-proof partition is not more than 2000㎡, and each smoke-proof partition is equipped with a mechanical smoke exhaust system. The air volume of the smoke exhaust fan is calculated in accordance with Article 8.2.5 of the "Fire Protection Code for Garages, Repair Garages and Parking Lots". The smoke exhaust fan is installed at In the dedicated machine room, fire compartments that do not meet the natural air supply conditions shall be equipped with a mechanical air supply system, and the air supply volume shall not be less than 50% of the smoke exhaust volume; other smoke exhaust places shall be divided into smoke control zones in accordance with the provisions of Article 4.2. of GB51251; internal corridors with a length of more than 20 meters shall be equipped with a mechanical smoke exhaust system, and the smoke exhaust volume shall be calculated in accordance with the provisions of Articles 4.6.3 and 4.6.4 of GB51251; rooms with an underground area of ​​more than 50 square meters or a total area of ​​more than 200 square meters, windowless rooms with a ground area of ​​more than 50 square meters, or rooms with a floor area of ​​more than 100 square meters that cannot be naturally exhausted shall be equipped with a mechanical smoke exhaust system, and the smoke exhaust volume shall be calculated in accordance with the provisions of Articles 4.6.3 and 4.6.4 of GB51251; basement exhaust Smoke-filling places and rooms with a floor area of ​​more than 500 square meters are equipped with air supply facilities. The air supply system directly introduces air from the outside, and the air supply volume is not less than 50% of the smoke exhaust volume; the air volume of the smoke exhaust fan is not less than 1.2 times the calculated air volume, and the vertical service height of the mechanical smoke exhaust system is less than 50m; the fixed window settings of the mechanical smoke exhaust system are detailed in the architectural and curtain wall design drawings. The smoke and exhaust control module includes a smoke control unit, a smoke exhaust control unit and other control units. The smoke control unit performs smoke control on the VRF air conditioning system, and the smoke exhaust control unit performs smoke exhaust control on the VRF air conditioning system. The other control units are modified in real time according to the hospital building. .

[0020] The present invention provides a construction process for a VRF air conditioning system in a hospital renovation project, comprising the following steps:

[0021] Step 1: Determine the required load: The air conditioning engineering design platform designs the cold source and heat source of the air conditioning according to the load requirements of the VRF air conditioning system;

[0022] Step 2: Determine the installation location and adjust the ventilation volume: The ventilation design platform designs the ventilation volume required for different installation locations of the VRF air conditioning system;

[0023] Step 3: Air volume design: The HVAC professional design platform designs windproof, exhaust and fire-fighting related facilities for the VRF air-conditioning system;

[0024] Step 4: Energy-saving design: The air conditioning energy-saving design platform selects indoor design parameters in accordance with the "Energy-saving Design Standard for Public Buildings", "Design Code for Heating, Ventilation and Air Conditioning of Civil Buildings" (GB50736-2012), and "Design Code for General Hospital Buildings" (GB 51039-2014);

[0025] Step 5: Construction and installation: Carry out corresponding construction and installation according to the installation design drawings.

[0026] Compared with the prior art, the beneficial effects of the present invention are as follows: by setting up a ventilation design platform and a HVAC professional platform, the ventilation volume required for different installation positions of the VRF air-conditioning system is designed, and the windproof, exhaust and fire-fighting related facilities of the VRF air-conditioning system are designed, so that the ventilation volume and air-conditioning load meet people's usage needs and are highly practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the present invention;

[0028] Figure 2 This is a schematic diagram of the architecture of the water supply design platform of the present invention;

[0029] Figure 3 This is a schematic diagram of the architecture of the drainage design platform of the present invention;

[0030] Figure 4 It is a schematic diagram of the architecture of the air conditioning engineering design platform of the present invention;

[0031] Figure 5 It is a schematic diagram of the architecture of the ventilation design platform of the present invention;

[0032] Figure 6 This is a schematic diagram of the architecture of the HVAC professional design platform of the present invention;

[0033] Figure 7 It is a flow chart of the present invention. DETAILED DESCRIPTION

[0034] The following will be combined with 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 making creative work are within the scope of protection of the present invention.

[0035] See also Figure 1-7 , the present invention provides a VRF air conditioning system for hospital renovation and reconstruction projects, including a VRF air conditioning system body, the VRF air conditioning system body including a water supply design platform, a drainage design platform, an air conditioning engineering design platform, a HVAC professional design platform and an air conditioning energy-saving design platform;

[0036] The water supply design platform designs the water supply required by the VRF air conditioning system itself;

[0037] The drainage design platform performs drainage design for the water required by the VRF air conditioning system itself;

[0038] The air conditioning engineering design platform designs the cold source and heat source of the air conditioning according to the load requirements of the VRF air conditioning system;

[0039] The ventilation design platform designs the ventilation volume required for different installation locations of the VRF air conditioning system;

[0040] The HVAC professional design platform designs windproof, exhaust and fire-fighting related facilities for VRF air-conditioning systems;

[0041] The air conditioning energy-saving design platform selects indoor design parameters in accordance with the "Energy-saving Design Standard for Public Buildings", "Design Code for Heating, Ventilation and Air Conditioning of Civil Buildings" (GB50736-2012), and "Design Code for General Hospital Buildings" (GB 51039-2014).

[0042] The water supply design platform includes indoor water supply design module, drinking water design module and hot water design module. The indoor water supply design module adopts a zoning system to supply water. The drinking water design module is supplied by the municipal water supply pipe to meet the living water demand of the entire hospital. The boiling water consumption is calculated at 2L / person / d. Each floor is equipped with purified drinking water equipment. The hot water design module designs the hot water consumption and hot water supply respectively.

[0043] The drainage design platform includes drainage design module, area design module and pipe design module. The drainage design module sets the domestic sewage volume as 90% of its water supply volume, excluding water for greening irrigation and road sprinkling, which is about 356.0m in total. 3 / d, the regional design module adopts the rainwater and sewage separation system outdoors, and the sewage and waste separation indoors. Fecal sewage is treated in a septic tank, and the treated sewage is discharged to the hospital sewage treatment station. After secondary biological treatment and disinfection, the pipe design module sets the drainage pipes. The pipe design module includes outdoor units and indoor units. The buried water supply pipes of the outdoor units adopt ductile iron water supply pipes and rubber ring socket joints. Domestic sewage pipes and rainwater pipes DN≤400 adopt UPVC reinforced pipes and rubber sealing ring socket joints; DN>400 adopts reinforced concrete drainage pipes and cement mortar joints. The indoor unit water supply pipes and hot water mains adopt thin-walled stainless steel pipes, argon arc welding, and branch pipes adopt PPR pipes, hot-melt connections. Fire protection pipes DN≤100mm adopt hot-dip galvanized steel pipes, DN≤65mm, threaded connection; DN>65mm, clamp connection.

[0044] The air conditioning engineering design platform includes an air conditioning load calculation module, an air conditioning cold source design module, an air conditioning heat source design module and an air cleanliness design module. The air conditioning load calculation module calculates the air conditioning load specifically as cold load and heat load. The air conditioning cold source design module designs the installation position of the air conditioning cold source and the working range of the cold source. The air conditioning heat source design module designs the installation position of the air conditioning heat source and the working range of the heat source. The air cleanliness design module installs ion air purifiers on the fresh air fan inlet duct and the air return duct of the air conditioning unit, and installs ion air purifiers at the return air outlet of the air conditioner at the end of the key room. An indoor air quality monitoring system is installed in the lobby of the outpatient building, which is linked with the ventilation system to adjust the air volume of the fresh air system and the exhaust system according to the concentration of carbon dioxide.

[0045] The ventilation design platform includes main room ventilation design module, garage ventilation design module, kitchen ventilation design module, special room ventilation design module, emergency ventilation design module, pipe ventilation design module and other ventilation design modules. The main room ventilation design module is used for the ventilation design of the main room. The garage ventilation design module is equipped with a mechanical ventilation system in the basement garage. Under the joint action of the supply fan or natural air intake and exhaust fan, the air in the garage forms an organized flow. The garage exhaust volume is calculated according to the dilution concentration method and the ventilation frequency of 6 times / hour to take the larger value. The make-up air volume is 80% of the exhaust volume. The garage is equipped with a CO concentration detection device, which is interlocked with the fan. The garage mechanical exhaust system also serves as a smoke exhaust system, and the garage air supply system also serves as a smoke exhaust and make-up air system. In the kitchen ventilation design module, the fume is discharged to the atmosphere after being treated by an electrostatic fume purification device. The maximum allowable exhaust emission concentration is ≤2.0mg / m 3, the efficiency of oil fume purification facilities is ≥85%, the fan and electrostatic oil fume purification device are installed on the roof, the exhaust system is set up according to the exhaust volume of 6 times / h during operation, and the emergency ventilation system is set up in the food processing room using gas, with an exhaust volume of 12 times / h, which is linked to the gas leak alarm system. The emergency ventilator is set outdoors, and the make-up air volume is not less than 80% of the exhaust volume. The special room ventilation design module is equipped with a mechanical exhaust system in each ward isolation ward, and the difference between the exhaust volume and the fresh air volume of each room is not less than 150m 3 / h, the exhaust vents of the ward are respectively set in the bedside area and the lower side, and the exhaust vents of other rooms are located on the ceiling. The exhaust air is discharged by the roof exhaust fan through the exhaust duct. A high-efficiency filter is installed at the exhaust vent. The manual control device of the emergency ventilation design module is respectively set at the indoor and outdoor locations that are convenient for operation. The emergency ventilator in the room using gas facilities adopts explosion-proof type and is equipped with reliable anti-static grounding. The gas kitchen is equipped with a gas leak detection system. When the gas concentration in the room exceeds the standard, the emergency ventilator is turned on and the emergency shut-off valve of the gas supply pipeline is closed at the same time. The pipe ventilation design module designs various types of duct pipes and insulation thickness. Other ventilation design modules are public toilets A mechanical exhaust system is installed, and the exhaust volume is calculated based on 15 air changes per hour. Mechanical exhaust systems are installed in the drug store, laboratory, debridement, emergency and waiting rooms, and the exhaust volume is calculated based on 3 air changes per hour. Mechanical exhaust systems are installed in the radiology room, nuclear medicine room and spare room, and the exhaust volume is calculated based on 6 air changes per hour. Outdoor exhaust vents are reasonably set based on the local dominant wind direction in winter and summer to effectively discharge indoor polluted gases and ensure that the air standards of the outdoor square meet environmental protection requirements. In addition to the mechanical ventilation system, the building itself also organizes effective natural ventilation methods to ensure indoor air quality at the lowest system operating cost.

[0046] The HVAC professional design platform includes smoke prevention design module, smoke exhaust design module, fire prevention design module and smoke prevention and exhaust control module. The smoke prevention design module performs smoke prevention design for the VRF air conditioning system, and the smoke exhaust design module performs smoke exhaust design for the VRF air conditioning system. In addition to the indications on the drawings, the fire prevention design module provides fire dampers that automatically close at 70°C for ventilation and air conditioning ducts in the following situations: a. Where the duct passes through the fire partition; b. Where the duct passes through the ventilation and air conditioning room, floor slab, important or fire-hazardous room partition wall and floor slab; c. On the horizontal pipe section where the vertical duct meets the horizontal duct on each floor; d. Where the duct passes through the partition wall with fire doors, and the deformation joints of the fire partition On both sides, the kitchen exhaust pipe is equipped with a 150℃ automatically closed fire damper where it passes through the firewall or fire partition. In addition to the indication on the drawings, smoke exhaust fire dampers are installed at the following locations of the exhaust pipe: a. On the horizontal pipe section where the vertical air duct meets the horizontal air duct on each floor; b. On the exhaust branch pipe of a smoke exhaust system that supports multiple smoke partitions; c. At the entrance of the smoke exhaust fan; d. At the point where it passes through the fire partition; The air ducts are made of non-combustible materials; the air duct insulation is made of non-combustible materials, and the air conditioning water pipe insulation is made of flame-retardant materials; the fire resistance limit of the horizontal pressurized air supply duct is not less than 0.5h when it is set in the ceiling, and the fire resistance limit is not less than 1.0h when it is not set in the ceiling; the fire resistance limit of the vertical smoke exhaust duct is not less than 0.5h; when horizontal smoke exhaust ducts pass through fire partitions or are set in corridor ceilings, or are not set in ceilings, the fire resistance limit is not less than 1.0h. The fire resistance limit of horizontal smoke exhaust ducts set in ceilings in other places and horizontal smoke exhaust ducts in garages is not less than 0.5h; the fire resistance limit of air supply ducts is not less than 0.5h, and the fire resistance limit of air supply ducts crossing fire partitions is not less than 1.5h; the above-mentioned ducts are equipped with fire protection outside the galvanized steel plate ducts, and fiber-reinforced silicate fireproof panels are coated on the outside of the galvanized steel plate ducts with reference to the practices in the national standard atlas 07K-103-2; smoke, exhaust, heating, ventilation and air-conditioning ducts are required to pass through fireproof walls, floor slabs and fire walls. The pores at the point are sealed with fireproof blocking materials; when the air duct passes through fireproof partition walls, floor slabs and fire walls, the fire dampers and smoke exhaust fire dampers on the air duct at the point of crossing shall be filled with fire-resistant air ducts or the outer walls of the air ducts shall be protected by fireproof measures, and the fire resistance limit shall not be lower than the fire resistance limit of the fireproof partition; the inspection door of the water pipe well shall be a Class C fire door; the inspection door of the pressurized air supply pipe well and the fire exhaust pipe well shall be a Class B fire door; the water pipe well shall be separated by fire with non-combustible materials with a fire resistance limit of 1.5h on each floor slab; the holes connecting the pipe well with the room and corridor shall be tightly filled with non-combustible materials, and the smoke and exhaust control module shall control the smoke and exhaust of the VRF air-conditioning system.

[0047] The smoke-proof design module includes a natural ventilation unit and a mechanical pressurized air supply unit. The natural ventilation unit adopts a closed stairwell and a smoke-proof stairwell with natural ventilation and smoke prevention. An openable external window opening with a total area of ​​not less than 2 m2 is set in every 5 floors of its outer wall, and the arrangement interval is not more than 3 floors; at the same time, an openable external window opening with an area of ​​not less than 1 m2 is set at its highest part; some closed stairwells that only serve the first underground floor have a direct outdoor evacuation door with an effective area of ​​not less than 1.2 m2 on the first floor; some closed stairwells that only serve the underground mezzanine and the first underground floor have openable external windows of not less than 2 m2 on the outer wall, and an openable external window with an area of ​​not less than 1 m2 is set at the highest part of the first floor; the area of ​​the openable external window opening of the independent vestibule and the fire elevator vestibule that adopts natural ventilation and smoke prevention is not less than 2 m2, and the area of ​​the openable external window opening of the shared vestibule that adopts natural ventilation and smoke prevention is not less than 3 m2; the external windows that are set at a high place and are not convenient to open are set at a distance of not less than 1.2 m2. A manual opening device shall be installed at 1.3-1.5m from the ground; when closed staircases, smoke-proof staircases, antechambers or shared antechambers use openable external windows for natural ventilation, the effective area of ​​the open external windows shall not be less than 1 / 3 of the openable external window area. For the specific window positions and areas, please refer to the architectural and curtain wall design drawings and mechanical pressurized air supply units. Mechanical pressurized air supply units are installed in smoke-proof staircases that cannot use natural ventilation for smoke prevention. The design positive pressure value is 40-50Pa. Independent pressurized air supply systems are installed in the underground and ground sections of the staircases respectively; independent mechanical pressurized air supply systems are installed in each section of the staircases divided into sections on the refuge floor; mechanical pressurized air supply systems are installed in antechambers and shared antechambers that cannot use natural ventilation for smoke prevention. The design positive pressure value is 25-30Pa; each floor is equipped with a normally closed multi-leaf air supply outlet; the air volume of the pressurized air supply system is calculated in accordance with the provisions of Article 3.4 of GB51251, and the fan air volume is not less than 1.2 times, the vertical service height of the pressurized air supply system is less than 100m; the fixed window setting of the stairwell of the pressurized air supply system is detailed in the architectural and curtain wall design drawings. The smoke exhaust design module includes natural smoke exhaust facility units and mechanical smoke exhaust facility units. Natural smoke exhaust is used in places where natural smoke exhaust facility units cannot meet the natural smoke exhaust conditions; natural smoke exhaust windows are set on the top or outer wall of the smoke exhaust area. When set on the outer wall, the natural smoke exhaust window is within the smoke storage bin; for corridors or rooms with a clear indoor height of no more than 3m, the lower edge of the natural smoke exhaust window shall be no less than 1 / 2 of the indoor clear height; the natural smoke exhaust window is opened along the airflow direction of the fire smoke, And there are devices for easy opening; the window area that does not meet the above requirements shall not be included in the effective window area. When the room area is not more than 200 m2, the opening direction of the natural smoke exhaust window is not limited; the location and specifications of the natural smoke exhaust window are detailed in the architectural and curtain wall design drawings. Mechanical smoke exhaust facilities are installed in all smoke exhaust places where the mechanical smoke exhaust facility unit cannot meet the natural smoke exhaust conditions; the underground garage is designed with a mechanical smoke exhaust system that is used in conjunction with the normal exhaust system. The smoke-proof partition is not more than 2,000 m2, and each smoke-proof partition is equipped with a mechanical smoke exhaust system. The air volume of the smoke exhaust fan is calculated in accordance with Article 8.2.5 of the "Fire Protection Code for Garages, Repair Garages and Parking Lots". The smoke exhaust fan is set In the dedicated machine room, fire compartments that do not meet the natural air supply conditions shall be equipped with a mechanical air supply system, and the air supply volume shall not be less than 50% of the smoke exhaust volume; other smoke exhaust places shall be divided into smoke control zones in accordance with the provisions of Article 4.2. of GB51251; internal corridors with a length of more than 20 meters shall be equipped with a mechanical smoke exhaust system, and the smoke exhaust volume shall be calculated in accordance with the provisions of Articles 4.6.3 and 4.6.4 of GB51251; rooms with an underground area of ​​more than 50 square meters or a total area of ​​more than 200 square meters, windowless rooms with a ground area of ​​more than 50 square meters, or rooms with a floor area of ​​more than 100 square meters that cannot be naturally exhausted shall be equipped with a mechanical smoke exhaust system, and the smoke exhaust volume shall be calculated in accordance with the provisions of Articles 4.6.3 and 4.6.4 of GB51251; Air supply facilities are installed in smoke exhaust places in the basement and rooms with a floor area of ​​more than 500 square meters. The air supply system directly introduces air from the outside, and the air supply volume is not less than 50% of the exhaust volume; the air volume of the smoke exhaust fan is not less than 1.2 times the calculated air volume, and the vertical service height of the mechanical smoke exhaust system is less than 50m; the fixed window settings of the mechanical smoke exhaust system are detailed in the architectural and curtain wall design drawings. The smoke and exhaust control module includes a smoke control unit, a smoke exhaust control unit and other control units. The smoke control unit performs smoke control on the VRF air conditioning system, and the smoke exhaust control unit performs smoke exhaust control on the VRF air conditioning system. Other control units are modified in real time according to the hospital building. .

[0048] The present invention provides a construction process for a VRF air conditioning system in a hospital renovation project, comprising the following steps:

[0049] Step 1: Determine the required load: The air conditioning engineering design platform designs the cold source and heat source of the air conditioning according to the load requirements of the VRF air conditioning system;

[0050] Step 2: Determine the installation location and adjust the ventilation volume: The ventilation design platform designs the ventilation volume required for different installation locations of the VRF air conditioning system;

[0051] Step 3: Air volume design: The HVAC professional design platform designs windproof, exhaust and fire-fighting related facilities for the VRF air-conditioning system;

[0052] Step 4: Energy-saving design: The air conditioning energy-saving design platform selects indoor design parameters in accordance with the "Energy-saving Design Standard for Public Buildings", "Design Code for Heating, Ventilation and Air Conditioning of Civil Buildings" (GB50736-2012), and "Design Code for General Hospital Buildings" (GB 51039-2014);

[0053] Step 5: Construction and installation: Carry out corresponding construction and installation according to the installation design drawings.

[0054] In the present invention, according to the actual situation of the project and combined with the experience of previous similar projects, the air conditioning of this project is divided into the following three areas for air conditioning load estimation: Building 1, Building 2, and Building 3. Air conditioning cold and heat sources: This project is a renovation project, and the civil construction has been completed. The original air conditioning system design of Building 1 and Building 3 adopts a variable frequency multi-link VRF system. The outdoor units of the two buildings have been reserved. The original air conditioning system design of Building 2 adopts an air-cooled heat pump unit, which is placed on the five-story roof. Both basements are underground garages with low floor heights. It is difficult to transform them into refrigeration rooms and boiler rooms, and the net height does not meet the installation space of underground air conditioners and water mains; air conditioning use in various departments of the hospital The needs are relatively independent. Some departments, such as the inspection center and the radiology department, require long-term cooling, and some departments require both cooling and heating. The VRF air-conditioning system is more flexible and can meet these requirements at the same time, while the traditional central air-conditioning water system cannot. In addition, the height of Building 3 is relatively low, and the use of the air-conditioning water system has a greater impact on the net height. In summary, the air-conditioning cold and heat sources of this project are determined as follows: Except for the operating room in Building 2, which uses a four-pipe air-cooled heat pump unit due to process requirements and is placed in the air-cooled heat pump unit area reserved in the original Building 2, all other functional rooms independently use the VRF air-conditioning system, and the VRF outdoor unit is set on the roof or equipment reserved for the original soil construction time. The newly added VRF outdoor unit of Building 2 is placed on the east and west sides of the 5th floor roof, and large-scale civil engineering adjustments and reinforcements are avoided as much as possible. The variable refrigerant flow air-conditioning VRF system of this project is estimated to be 2260HP in total. The outdoor unit is installed on the roof, reserved equipment platform or outdoor ground nearby, and the length of the refrigerant pipe is shortened as much as possible to meet the energy-saving design standards. The fresh air adopts split-type fresh air fans, and the fresh air fans of all fresh air systems are equipped with primary and medium-efficiency filtration devices. The VRF indoor units all use four-outlet ceiling units or thin duct units; the clean area of ​​the operating room uses two four-pipe cooling and heating integrated air-cooling heat pump units with a cooling and heating capacity of 120kW as independent cold source backup, and the Located on the south roof of Building 2, the operating room air conditioning and purification system is designed by a professional equipment company. The magnetic resonance imaging (MRI), linear accelerator, SPECT-CT, PET-CT machine room, and information center machine room use a dedicated constant temperature and humidity air conditioning system. The fire control room and elevator machine room are equipped with split air conditioning units for cooling. To improve the cleanliness of the room air, ion air purifiers are installed on the fresh air fan inlet duct and the air conditioning unit return duct. Ion air purifiers are installed at the return air outlet of the air conditioner at the end of the key room. An indoor air quality monitoring system is installed in the lobby of the outpatient building, which is linked to the ventilation system to adjust the air volume of the fresh air system and the exhaust system according to the concentration of carbon dioxide;Garage ventilation design: The basement garage is equipped with a mechanical ventilation system. Under the joint action of the supply fan (or natural air intake) and the exhaust fan, the air in the garage forms an organized flow. The garage exhaust volume is calculated according to the dilution concentration method and the ventilation frequency of 6 times / hour to take the larger value, and the makeup air volume is 80% of the exhaust volume. The garage is equipped with a CO concentration detection device, which is interlocked with the fan. The garage mechanical exhaust system also serves as a smoke exhaust system, and the garage air supply system also serves as a smoke exhaust and makeup air system. Since the underground garage has been completed and has been completed, if no civil engineering renovation is done this time, it will remain as it is. The oil fume is treated by the electrostatic oil fume purification device and then discharged to the atmosphere. The maximum allowable exhaust emission concentration is ≤2.0mg / m3, and the efficiency of the oil fume purification facility is ≥85%. The fan and electrostatic oil fume purification device are set at Roof, exhaust system is set up with comprehensive exhaust system according to the exhaust volume of 6 times / h during operation; in the food processing room using gas, an emergency ventilation system is set up with the exhaust volume of 12 times / h, linked with the gas leakage alarm system, and the emergency ventilator is set up outdoors; the make-up air volume is not less than 80% of the exhaust volume, special room ventilation design: each ward isolation ward is equipped with a mechanical exhaust system, and the difference between the exhaust volume and the fresh air volume in each room is not less than 150m3 / h. The exhaust vents of the ward are respectively set in the bedside area and the lower side, and the exhaust vents of other rooms are located on the ceiling, and the exhaust air is discharged by the roof exhaust fan through the exhaust duct; a high-efficiency filter is installed at the exhaust vent, emergency ventilation: the gas kitchen is equipped with emergency ventilation (shared with the normal exhaust system), and the air exchange frequency of the emergency ventilation is not less than 12 times / h, manual control devices for emergency ventilation are set up at convenient locations indoors and outdoors; emergency ventilators in rooms using gas facilities are explosion-proof and have reliable anti-static grounding; gas kitchens are equipped with gas leak detection systems; when the gas concentration in the room exceeds the standard, the emergency ventilator is turned on, and the emergency shut-off valve of the gas supply pipeline is closed at the same time; public toilets are equipped with mechanical exhaust systems, and the exhaust volume is calculated based on the air changes of 15 times / hour; drug storage, laboratory, debridement, rescue, and waiting rooms are equipped with mechanical exhaust systems, and the exhaust volume is calculated based on the air changes of 3 times / hour; radiology rooms, nuclear medicine rooms, and spare rooms are equipped with mechanical exhaust systems, and the exhaust volume is calculated based on the air changes of 6 times / hour. The outdoor exhaust vents are combined with the local dominant ventilation systems in winter and summer. The wind direction is reasonably set to effectively discharge indoor polluted gases and ensure that the air standards of the outdoor square meet environmental protection requirements. In addition to the mechanical ventilation system, the building itself also organizes effective natural ventilation methods to ensure indoor air quality at the lowest system operating costs. HVAC professional fire protection design, smoke prevention design, natural ventilation facilities: This project adopts closed stairwells and smoke-proof stairwells with natural ventilation and smoke prevention methods. Openable external windows (openings) with a total area of ​​not less than 2㎡ are set in every 5 floors of the outer wall, and the arrangement interval is not more than 3 floors; at the same time, openable external windows (openings) with an area of ​​not less than 1㎡ are set at the highest part; some closed stairwells that only serve the underground floor have direct outdoor evacuation doors with an effective area of ​​not less than 1.2㎡ on the first floor;Some closed stairwells that only serve the underground mezzanine and the first underground floor shall be provided with openable external windows of not less than 2㎡ on the outer wall, and the openable external windows of not less than 1㎡ shall be provided at the highest part of the first floor; the openable external windows (openings) of the independent antechamber and fire elevator antechamber of this project that adopt natural ventilation and smoke prevention shall be not less than 2㎡, and the openable external windows (openings) of the shared antechamber that adopts natural ventilation and smoke prevention shall be not less than 3㎡; the external windows that are set at high places and are not convenient to open shall be provided with manual opening devices at a height of 1.3 to 1.5m from the ground; when the closed stairwell, smoke-proof stairwell, antechamber (or shared antechamber) adopts openable external windows for natural ventilation, the effective area of ​​the openable external windows shall be not less than 1 / 3 of the openable external window area. For specific window positions and areas, see Design drawings for architectural and curtain wall professionals; Mechanical pressurized air supply facilities: (1) A mechanical pressurized air supply system shall be installed in smoke-proof stairwells where natural ventilation and smoke prevention cannot be adopted, with a design positive pressure of 40-50Pa. Independent pressurized air supply systems shall be installed in the underground and ground sections of the stairwell respectively; an independent mechanical pressurized air supply system shall be installed in each section of the staircase in the refuge floor; (2) A mechanical pressurized air supply system shall be installed in the antechamber and shared antechamber where natural ventilation and smoke prevention cannot be adopted, with a design positive pressure of 25-30Pa, and a normally closed multi-leaf air supply vent on each floor; (3) The air volume of the pressurized air supply system shall be calculated in accordance with Article 3.4 of GB51251, the fan air volume shall not be less than 1.2 times the calculated air volume, and the vertical service height of the pressurized air supply system shall be less than 100m; (4) Set up pressurized air supply system; For details on the fixed windows in the stairwell of the compressed air system, please refer to the architectural and curtain wall design drawings; Smoke exhaust design: Natural smoke exhaust facilities: (1) All places that meet the natural smoke exhaust conditions in this project adopt natural smoke exhaust; (2) Natural smoke exhaust windows (openings) are set on the top or outer wall of the smoke exhaust area. When set on the outer wall, the natural smoke exhaust windows (openings) are inside the smoke storage bin; for corridors or rooms with a clear indoor height of no more than 3m, the height of the lower edge of the natural smoke exhaust window from the indoor floor shall not be less than 1 / 2 of the indoor clear indoor height; the natural smoke exhaust window opens along the airflow direction of the fire smoke and has a device for easy opening; the window area that does not meet the above requirements shall not be included in the effective window area; when the room area is no more than 200㎡, the opening direction of the natural smoke exhaust window is not limited; (3) The location and specifications of natural smoke exhaust windows (openings) are detailed in the architectural and curtain wall design drawings; Mechanical smoke exhaust facilities: (1) Mechanical smoke exhaust facilities are installed in all smoke exhaust places that cannot meet the natural smoke exhaust conditions of this project; (2) The underground car garage is designed with a mechanical smoke exhaust system that is used in conjunction with the normal exhaust system. The smoke-proof partition is not larger than 2,000 m2. Each smoke-proof partition is equipped with a mechanical smoke exhaust system. The air volume of the smoke exhaust fan is calculated in accordance with Article 8.2.5 of the "Design Fire Protection Code for Car Garages, Repair Garages and Parking Lots". The smoke exhaust fan is installed in a dedicated machine room. A mechanical air supply system is installed in the fire compartment that does not meet the natural air supply conditions. The air supply volume is not less than 50% of the smoke exhaust volume; (3) Other smoke exhaust places are divided into smoke-proof partitions in accordance with Article 4.2 of GB51251;(4) A mechanical smoke exhaust system shall be installed for internal corridors with a length of more than 20 meters, and the smoke exhaust volume shall be calculated in accordance with the provisions of Articles 4.6.3 and 4.6.4 of GB51251; (5) A mechanical smoke exhaust system shall be installed for rooms with an underground area of ​​more than 50 square meters or a total area of ​​more than 200 square meters, a windowless room with an above-ground area of ​​more than 50 square meters, or a room with an area of ​​more than 100 square meters that cannot be naturally exhausted, and the smoke exhaust volume shall be calculated in accordance with the provisions of Articles 4.6.3 and 4.6.4 of GB51251; (6) Air supply facilities shall be installed in basement smoke exhaust areas and rooms with an above-ground area of ​​more than 500 square meters. The air supply system directly introduces air from the outside, and the air supply volume shall not be less than 50% of the smoke exhaust volume; (7) The air volume of the smoke exhaust fan shall not be less than 1.2 times the calculated air volume, and the vertical service height of the mechanical smoke exhaust system shall be less than 1.2 times the calculated air volume. 50m; (8) For the fixed windows in places where mechanical smoke exhaust systems are installed, please refer to the architectural and curtain wall design drawings for details; Fire protection design: (1) Except as indicated on the drawings, ventilation and air conditioning ducts in the following situations are equipped with fire dampers that automatically close at 70°C: a. Where the duct passes through fire partitions; b. Where the duct passes through ventilation and air conditioning machine rooms, floors, walls and floors of important or fire-hazardous rooms; c. On the horizontal pipe section where the vertical duct meets the horizontal duct on each floor; d. Where the duct passes through the partition wall with fire doors, and on both sides of the expansion joint of the fire partition; (2) Where the kitchen exhaust duct passes through the firewall or fire partition wall, a fire damper that automatically closes at 150°C is installed; (3) Except as indicated on the drawings, smoke exhaust fire dampers are installed at the following locations of the smoke exhaust duct: a. Vertical air duct a. On the horizontal pipe section where the pipe intersects with the horizontal air duct on each floor; b. On the smoke exhaust branch pipe of multiple smoke-proof partitions supported by one smoke exhaust system; c. At the entrance of the smoke exhaust fan; d. At the point where it crosses the fire partition; (4) The air ducts are made of non-combustible materials; the air duct insulation is made of non-combustible materials, and the air conditioning water pipe insulation is made of flame-retardant materials; (5) The fire resistance limit of the horizontal pressurized air supply duct when it is set in the ceiling shall not be less than 0.5h, and the fire resistance limit of the vertical smoke exhaust duct shall not be less than 0.5h; the fire resistance limit of the horizontal smoke exhaust duct when it crosses the fire partition or is set in the corridor ceiling or is not set in the ceiling, shall not be less than 1.0h, and the fire resistance limit of the horizontal smoke exhaust duct in the other places and the horizontal smoke exhaust duct in the garage shall not be less than 0.5 h; The fire resistance limit of the air supply duct shall not be less than 0.5h. When the air supply duct crosses the fire partition, the fire resistance limit shall not be less than 1.5h. The above-mentioned ducts shall be equipped with fire protection outside the galvanized steel plate duct. Referring to the practice in the national standard atlas 07K-103-2, the galvanized steel plate duct shall be covered with fiber-reinforced silicate fireproof board; (6) The holes of smoke, exhaust, heating, ventilation and air-conditioning ducts passing through fireproof walls, floors and firewalls shall be sealed with fireproof sealing materials. When the duct passes through fireproof walls, floors and firewalls, the fire dampers on the ducts at the crossing points and the ducts within 2 meters on both sides of the smoke exhaust fire dampers shall be fire-resistant ducts or fire protection measures shall be taken on the outer wall of the duct, and the fire resistance limit shall not be lower than the fire resistance limit of the fire partition; (7) The inspection door of the water pipe well shall be a Class C fire door;The inspection doors of the pressurized air supply pipe shaft and the fire smoke exhaust pipe shaft are Class B fire doors; (8) The water pipe shaft is separated by fire separation with non-combustible materials with a fire resistance limit of 1.5h on each floor slab, and the gaps between the pipe shaft and the room and corridor are filled with non-combustible materials; Smoke and exhaust system control: Smoke and exhaust system control: (1) The pressurized air supply fan is controlled by the following methods: manual start on site; automatic start by the fire alarm system; manual start in the fire control room; when any normally closed air supply outlet in the system is opened, the pressurized fan is automatically started; (2) Open the fire compartment within 15 seconds after the fire is confirmed in the fire compartment. All pressurized air supply systems in the stairwells of the area, open the pressurized air supply systems of the fire floor and its adjacent upper and lower floors and the shared antechamber within the fire compartment; smoke exhaust system control: (1) The smoke exhaust fan and the make-up air fan are controlled by the following methods: manual start on site; automatic start by the automatic fire alarm system; manual start in the fire control room; when any smoke exhaust port / valve in the system is opened, the smoke exhaust fan and the make-up air fan are automatically started; when the 280℃ smoke exhaust fire damper at the entrance of the smoke exhaust fan is closed, the smoke exhaust fan and the make-up air fan are chained and closed; (2) The normally closed smoke exhaust port / valve in the mechanical smoke exhaust system has an automatic fire alarm system. (1) The fire alarm system can be manually activated by the fire alarm system and manually activated on site; (2) The fire alarm system can be manually activated by the fire alarm system and manually activated on site; (3) After the fire is confirmed, only the smoke exhaust port / valve and the corresponding smoke exhaust system of the fire smoke partition are opened, and the smoke exhaust ports / valves of other smoke partitions remain closed; (4) The movable smoke barrier has the function of automatic activation by the fire automatic alarm system and manual activation on site; after the fire is confirmed, the fire automatic alarm system will link all the movable smoke barriers of the corresponding smoke partition within 15 seconds, and the smoke barriers will be opened in place within 60 seconds; (5) The automatic smoke exhaust window adopts a control method linked to the fire automatic alarm system (or temperature release device). When the automatic start-up with the automatic fire alarm system is adopted, the automatic smoke exhaust window shall be opened within 60s or less than the time for the smoke to fill the smoke storage bin. The temperature control release temperature of the automatic smoke exhaust window with temperature control function shall be 30℃ higher than the ambient temperature and less than 100℃. The fire control equipment can display the opening and closing status of the supply fan and valve facilities of the smoke prevention system and the opening and closing status of the smoke exhaust fan, make-up fan and valve facilities of the smoke exhaust system. The ventilator of the gas fire extinguishing room is set in the substation for normal ventilation. In case of fire, all fans stop running, and the electric fire dampers on the air ducts through the room and the normal exhaust branch pipes are closed;After the gas fire extinguishing is completed, the ventilator is started and the fire dampers on the air ducts passing through the room and the lower exhaust outlet branches are opened at the same time. At present, the above-ground and underground smoke exhaust systems of each building have been installed. According to this situation and the relevant requirements of the "Zhejiang Province Construction Engineering Fire Acceptance Operation Technical Guidelines (Trial)", the HVAC department intends to design the smoke exhaust system of this project as follows: a pressurized air supply machine room and air supply shaft will be added to the basement accordingly, and pressurized air will be supplied to the underground smoke-proof stairwells of Buildings 1#, 2# and 3#. A pressurized air supply system will be installed in the antechamber of the underground smoke-proof stairwell on the east side of Building 3#, and an air supply shaft will be installed in the antechamber accordingly (from mezzanine to B2). The above-ground part of the antechamber on the east side of Building 3# will be supplemented with a pressurized air supply system; the fan in the shared antechamber on the west side will be replaced according to the current specifications, and the 1# The independent staircase antechamber is supplemented with a pressurized air supply system. The shared antechamber of the 2# staircase is implemented according to the current specifications. The civil engineering pipe well is enlarged as needed (minimum 1.35m2). The pressurized air supply system of the two enclosed staircases in the 2# building uses the original system, but it needs to be re-tested to see if it meets the requirements. Considering the difficulty of renovating existing buildings, the original pressurized air supply well is used and there is no finished pipeline inside. The original civil engineering air duct is maintained. The smoke exhaust system is implemented according to the current specifications. The basement is not involved in this modification and remains unchanged. The energy-saving instructions for the air-conditioning system are selected in accordance with the "Energy-saving Design Standard for Public Buildings", "Design Code for Heating, Ventilation and Air Conditioning of Civil Buildings" (GB50736-2012), and "Design Code for General Hospital Buildings" (GB51039-2014). ;

[0055] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A VRF air conditioning system for a hospital renovation project, comprising a VRF air conditioning system body, characterized in that: The VRF air conditioning system body includes a water supply design platform, a drainage design platform, an air conditioning engineering design platform, a HVAC professional design platform and an air conditioning energy-saving design platform; The water supply design platform performs water supply design for the water required by the VRF air conditioning system body; The drainage design platform performs drainage design for the water required by the VRF air conditioning system body; The air conditioning engineering design platform designs the cold source and heat source of the air conditioning according to the load demand of the VRF air conditioning system; The ventilation design platform designs the ventilation volume required for different installation locations of the VRF air conditioning system; The HVAC professional design platform designs windproof, exhaust and fire-fighting related facilities for the VRF air-conditioning system; The air conditioning energy-saving design platform selects indoor design parameters according to the "Public Building Energy-Saving Design Standard", "Civil Building Heating, Ventilation and Air Conditioning Design Code" (GB50736-2012), and "General Hospital Building Design Code" (GB 51039-2014).

2. A VRF air conditioning system for a hospital renovation project according to claim 1, characterized in that: The water supply design platform includes an indoor water supply design module, a drinking water design module and a hot water design module. The indoor water supply design module adopts a zoning system to supply water. The drinking water design module is supplied by the municipal water supply pipe to meet the living water demand of the entire hospital. The boiled water consumption is calculated at 2L / person / d. Each floor is equipped with purified drinking water equipment. The hot water design module designs the hot water consumption and hot water supply respectively.

3. A VRF air conditioning system for a hospital renovation project according to claim 1, characterized in that: The drainage design platform includes a drainage design module, an area design module and a pipe design module. The drainage design module sets the domestic sewage volume to 90% of its water supply, excluding water for greening irrigation and road sprinkling, which is about 356.0m 3 / d, the regional design module adopts rainwater and sewage separation system outdoors, sewage and waste separation indoors, fecal sewage is treated in septic tanks, and the treated sewage is discharged into the hospital sewage treatment station. After secondary biological treatment and disinfection, the pipe design module sets the drainage pipes. The pipe design module includes outdoor units and indoor units. The buried water supply pipes of the outdoor units adopt ductile iron water supply pipes and rubber ring socket joints. Domestic sewage pipes and rainwater pipes DN≤400 adopt UPVC reinforced pipes and rubber sealing ring socket joints; DN>400 adopts reinforced concrete drainage pipes and cement mortar joints. The water supply pipes of the indoor units and hot water mains adopt thin-walled stainless steel pipes, argon arc welding, and branch pipes adopt PPR pipes, hot-melt connections. Fire protection pipes DN≤100mm adopt hot-dip galvanized steel pipes, DN≤65mm, threaded connection; DN>65mm, clamp connection.

4. The VRF air conditioning system for hospital renovation and reconstruction project according to claim 1, characterized in that: The air conditioning engineering design platform includes an air conditioning load calculation module, an air conditioning cold source design module, an air conditioning heat source design module and an air cleanliness design module. The air conditioning load calculation module calculates the air conditioning load specifically as cold load and heat load. The air conditioning cold source design module designs the installation position of the air conditioning cold source and the working range of the cold source. The air conditioning heat source design module designs the installation position of the air conditioning heat source and the working range of the heat source. The air cleanliness design module installs an ion air purifier on the fresh air fan inlet duct and the air return duct of the air conditioning unit, and installs an ion air purifier at the return air outlet of the air conditioner at the end of the key room. An indoor air quality monitoring system is installed in the lobby of the outpatient building, which is linked with the ventilation system to adjust the air volume of the fresh air system and the exhaust system according to the concentration of carbon dioxide.

5. The VRF air conditioning system for hospital renovation and reconstruction project according to claim 1, characterized in that: The ventilation design platform includes main room ventilation design module, garage ventilation design module, kitchen ventilation design module, special room ventilation design module, emergency ventilation design module, pipe ventilation design module and other ventilation design modules. The main room ventilation design module is for ventilation design of main rooms. The garage basement parking garage is equipped with a mechanical ventilation system. Under the joint action of the blower or natural air intake and exhaust fan, the air in the garage forms an organized flow. The garage exhaust volume is calculated according to the dilution concentration method and the ventilation frequency of 6 times / hour to take the larger value. The make-up air volume takes 80% of the exhaust volume. The garage is equipped with a CO concentration detection device, which is interlocked with the fan. The garage mechanical exhaust system also serves as a smoke exhaust system, and the garage air supply system also serves as a smoke exhaust and make-up air system. The kitchen ventilation design module's oil smoke is treated by an electrostatic oil smoke purification device and then discharged to the atmosphere. The maximum allowable exhaust emission concentration is ≤2.0mg / m 3 , the efficiency of oil fume purification facilities is ≥85%, the fan and electrostatic oil fume purification device are installed on the roof, the exhaust system is set up according to the exhaust volume of 6 times / h during operation, and the emergency ventilation system is set up in the food processing room using gas, the exhaust volume is 12 times / h, and it is linked with the gas leakage alarm system. The emergency ventilator is set outdoors, and the make-up air volume is not less than 80% of the exhaust volume. The special room ventilation design module is equipped with a mechanical exhaust system for each ward isolation ward, and the difference between the exhaust volume and the fresh air volume of each room is not less than 150m 3 / h, the ward exhaust vents are respectively arranged in the bedside area and the lower side, and the exhaust vents of other rooms are located on the ceiling. The exhaust air is discharged by the roof exhaust fan through the exhaust duct. A high-efficiency filter is arranged at the exhaust vent. The manual control device of the accident ventilation design module is respectively arranged at the indoor and outdoor locations convenient for operation. The accident ventilator in the room using gas facilities adopts explosion-proof type and is provided with reliable anti-static grounding. The gas kitchen is provided with a gas leak detection system. When the gas concentration in the room exceeds the standard, the accident ventilator is turned on and the emergency shut-off valve of the gas supply pipeline is closed at the same time. The pipe ventilation design module designs various types of duct pipes and insulation thickness. The other ventilation design modules are public The bathroom is equipped with a mechanical exhaust system, and the exhaust volume is calculated based on the ventilation frequency of 15 times / hour. The drug store, laboratory, debridement, rescue and waiting rooms are equipped with mechanical exhaust systems, and the exhaust volume is calculated based on the ventilation frequency of 3 times / hour. The radiology room, nuclear medicine room and spare room are equipped with mechanical exhaust systems, and the exhaust volume is calculated based on the ventilation frequency of 6 times / hour. The outdoor exhaust vents are reasonably set according to the local dominant wind direction in winter and summer to effectively discharge indoor polluted gases and ensure that the air standards of the outdoor square meet environmental protection requirements. In addition to the mechanical ventilation system, the building itself also organizes effective natural ventilation methods to ensure indoor air quality at the lowest system operating cost.

6. A VRF air conditioning system for a hospital renovation project according to claim 1, characterized in that: The HVAC professional design platform includes a smoke prevention design module, a smoke exhaust design module, a fire prevention design module and a smoke prevention and exhaust control module. The smoke prevention design module performs smoke prevention design on the VRF air conditioning system, and the smoke exhaust design module performs smoke exhaust design on the VRF air conditioning system. In addition to the indications on the drawings, the fire prevention design module provides fire dampers that automatically close at 70°C for ventilation and air conditioning ducts in the following situations: a. Where the duct passes through fire partitions; b. Where the duct passes through ventilation and air conditioning machine rooms, floors, walls and floors of important or fire-hazardous rooms; c. On the horizontal pipe section where the vertical duct meets the horizontal duct on each floor; d. Where the duct passes through the partition wall with fire doors, as well as the fire partitions. On both sides of the expansion joint, a fire damper that automatically closes at 150°C is installed where the kitchen exhaust pipe passes through a firewall or fire partition. Except as indicated on the drawings, smoke exhaust fire dampers are installed at the following locations of the exhaust pipe: a. On the horizontal pipe section where the vertical air duct meets the horizontal air duct on each floor; b. On the exhaust branch pipe of a smoke exhaust system that supports multiple smoke partitions; c. At the entrance of the smoke exhaust fan; d. At the point where it passes through the fire partition; The air ducts are made of non-combustible materials; the air duct insulation is made of non-combustible materials, and the air conditioning water pipe insulation is made of flame-retardant materials; the fire resistance limit of the horizontal pressurized air supply duct when it is set in the ceiling shall not be less than 0.5h, and the fire resistance limit when it is not set in the ceiling shall not be less than 1.0h; the fire resistance limit of the vertical smoke exhaust duct is The fire resistance limit is not less than 0.5h; when the horizontal smoke exhaust duct passes through the fire partition or is set in the corridor ceiling, or is not set in the ceiling, the fire resistance limit is not less than 1.0h, and the horizontal smoke exhaust duct set in the ceiling of other places and the horizontal smoke exhaust duct in the garage shall not be less than 0.5h; the fire resistance limit of the air supply duct shall not be less than 0.5h, and the fire resistance limit of the air supply duct crossing the fire partition shall not be less than 1.5h; the above-mentioned ducts shall increase fire protection outside the galvanized steel plate duct, refer to the practice in the national standard atlas 07K-103-2, and cover the galvanized steel plate duct with fiber reinforced silicate fireproof board; smoke, exhaust, heating, ventilation and air-conditioning ducts shall not pass through fireproof walls, floor slabs and fire walls The pores at the point are blocked with fireproof blocking materials; when the air duct passes through fireproof partition walls, floor slabs and fire walls, the fire dampers and smoke exhaust fire dampers on the air duct at the point of crossing are covered with fire-resistant air ducts or the outer walls of the air ducts are protected by fireproof measures, and the fire resistance limit is not lower than the fire resistance limit of the fireproof partition; the inspection door of the water pipe well is a Class C fire door; the inspection door of the pressurized air supply pipe well and the fire exhaust pipe well is a Class B fire door; the water pipe well is separated by fire with non-combustible materials with a fire resistance limit of 1.5h on each floor slab; the holes connecting the pipe well with the room and the corridor are tightly filled with non-combustible materials, and the smoke and exhaust control module performs smoke and exhaust control on the VRF air-conditioning system.

7. A VRF air conditioning system for hospital renovation and reconstruction according to claim 6, characterized in that: The smoke-proof design module includes a natural ventilation unit and a mechanical pressurized air supply unit. The natural ventilation unit adopts a closed stairwell and a smoke-proof stairwell with natural ventilation and smoke-proof methods. Openable external windows with a total area of ​​not less than 2 m2 are set in every 5 floors of the outer wall, and the arrangement interval is not more than 3 floors; at the same time, an openable external window opening with an area of ​​not less than 1 m2 is set at the highest part; Some closed stairwells that only serve the first underground floor shall have direct outdoor evacuation doors with an effective area of ​​not less than 1.2 m2 on the first floor; some closed stairwells that only serve the underground mezzanine and the first underground floor shall have openable external windows of not less than 2 m2 on the outer wall, and an openable external window of not less than 1 m2 shall be set at the highest part of the first floor; the openable external window opening area of ​​independent vestibules and fire elevator vestibules using natural ventilation and smoke prevention shall not be less than 2 m2, and the openable external window opening area of ​​shared vestibules using natural ventilation and smoke prevention shall not be less than 3 m2; external windows that are located at high places and are not convenient to open shall be equipped with manual opening devices at a height of 1.3-1.5 m from the ground; when closed stairwells, smoke-proof stairwells, vestibules or shared vestibules use openable external windows for natural ventilation, the effective area of ​​the openable external windows shall not be less than 1.2 m2. Less than 1 / 3 of the openable external window area. For specific window positions and areas, please refer to the architectural and curtain wall design drawings and mechanical pressurized air supply units. The mechanical pressurized air supply unit is installed in the smoke-proof stairwell where natural ventilation and smoke prevention cannot be used. The design positive pressure value is 40-50Pa. Independent pressurized air supply systems are respectively set up in the underground and ground sections of the stairwell; independent mechanical pressurized air supply systems are respectively set up in each section of the stairs divided into sections on the refuge floor; mechanical pressurized air supply systems are set up in the antechamber and shared antechamber where natural ventilation and smoke prevention cannot be used, and the design positive pressure value is 25-30Pa; each floor is equipped with normally closed multi-leaf air supply vents; the air volume of the pressurized air supply system is calculated in accordance with the provisions of Article 3.4 of GB51251, and the air volume of the fan shall not be less than 1.2 times the calculated air volume. The vertical service height of the system is less than 100m; the fixed window setting of the stairwell of the pressurized air supply system is detailed in the architectural and curtain wall design drawings. The smoke exhaust design module includes natural smoke exhaust facility units and mechanical smoke exhaust facility units. The natural smoke exhaust facility units cannot meet the natural smoke exhaust conditions and all smoke exhaust places require natural smoke exhaust. The natural smoke exhaust window is set on the top or outer wall of the smoke exhaust area; when it is set on the outer wall, the natural smoke exhaust window is within the smoke storage bin; for corridors or rooms with a clear indoor height of no more than 3m, the lower edge of the natural smoke exhaust window shall be no less than 1 / 2 of the indoor clear height from the ground; the natural smoke exhaust window opens along the airflow direction of the fire smoke and has a device for easy opening; the window area that does not meet the above requirements shall not be included in the effective window area. When the room area is not more than 200㎡, the opening direction of the natural smoke exhaust window is not limited; the location and specifications of the natural smoke exhaust window are detailed in the architectural and curtain wall design drawings. Mechanical smoke exhaust facilities are installed in all smoke exhaust places where the mechanical smoke exhaust facility unit cannot meet the natural smoke exhaust conditions; the underground garage is designed with a mechanical smoke exhaust system that is used in conjunction with the normal exhaust system. The smoke-proof partition is not more than 2000㎡, and each smoke-proof partition is equipped with a mechanical smoke exhaust system. The air volume of the smoke exhaust fan is calculated in accordance with Article 8.2.5 of the "Design Fire Protection Code for Garages, Repair Garages and Parking Lots". The smoke exhaust fan is installed in a special machine room. The fire partition that does not meet the natural air supply conditions is equipped with a mechanical air supply system, and the air supply volume is not less than 50% of the smoke exhaust volume; other smoke exhaust places are in accordance with GB51251 Section 4.2.Smoke-proof zones shall be divided according to the provisions of Article 4.6.3 and 4.6.4 of GB51251; mechanical smoke exhaust systems shall be installed in internal corridors with a length of more than 20 meters, and the smoke exhaust volume shall be calculated in accordance with the provisions of Articles 4.6.3 and 4.6.4 of GB51251; rooms with an underground area of ​​more than 50 square meters or a total area of ​​more than 200 square meters, windowless rooms with a ground area of ​​more than 50 square meters, or rooms with a floor area of ​​more than 100 square meters and where natural smoke exhaust is not possible shall all be equipped with mechanical smoke exhaust systems, and the smoke exhaust volume shall be calculated in accordance with the provisions of Articles 4.6.3 and 4.6.4 of GB51251; air supply facilities shall be installed in smoke exhaust places in basements and rooms with a floor area of ​​more than 500 square meters, and the air supply system shall directly Air is introduced from the outside, and the air supply volume is not less than 50% of the smoke exhaust volume; the smoke exhaust fan air volume is not less than 1.2 times the calculated air volume, and the vertical service height of the mechanical smoke exhaust system is less than 50m; the fixed window settings of the mechanical smoke exhaust system are detailed in the architectural and curtain wall design drawings. The smoke and exhaust control module includes a smoke control unit, a smoke exhaust control unit and other control units. The smoke control unit performs smoke control on the VRF air conditioning system, and the smoke exhaust control unit performs smoke exhaust control on the VRF air conditioning system. The other control units are modified in real time according to the hospital building.

8. A construction process for a VRF air conditioning system in a hospital renovation project according to any one of claims 1 to 7, characterized in that: The following steps are involved: Step 1: Determine the required load: The air conditioning engineering design platform designs the cold source and heat source of the air conditioning according to the load requirements of the VRF air conditioning system; Step 2: Determine the installation location and adjust the ventilation volume: The ventilation design platform designs the ventilation volume required for different installation locations of the VRF air conditioning system; Step 3: Air volume design: The HVAC professional design platform designs windproof, exhaust and fire-fighting related facilities for the VRF air-conditioning system; Step 4: Energy-saving design: The air conditioning energy-saving design platform selects indoor design parameters in accordance with the "Energy-saving Design Standard for Public Buildings", "Design Code for Heating, Ventilation and Air Conditioning of Civil Buildings" (GB50736-2012), and "Design Code for General Hospital Buildings" (GB 51039-2014); Step 5: Construction and installation: Carry out corresponding construction and installation according to the installation design drawings.

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