3115 results about "Air filter" patented technology

The invention relates to the technical field of tail gas treatment, and provides a tail gas denitration reactor for hydrogenation catalyst production, the tail gas denitration reactor comprises a treatment box and an adsorption shell mounted in the treatment box, one end of the adsorption shell is connected with a gas inlet pipe, the other end of the gas inlet pipe is connected with a gas outlet pipe, and two ends of the adsorption shell are provided with a plurality of connecting grooves; the upper end of the adsorption shell is connected with a first connecting frame and a second connecting frame. The two ends of the first gas filtering bin and the two ends of the second gas filtering bin are meshed and installed on the gear shaft, so that the gear shaft drives the first gas filtering bin and the second gas filtering bin to rotate, the first gas filtering bin and the second gas filtering bin alternately conduct tail gas adsorption work, and in the standby replacement process, the filter elements in the first gas filtering bin and the second gas filtering bin are cleaned; the device can adsorb tail gas in a long-term and high-quality mode, the problems that the filter element is blocked and the adsorption effect is reduced due to long-time use of the filter element are solved, and environment-friendly emission of the tail gas can be achieved in the hydrogenation catalyst production and manufacturing process.

A direct plug-in air purifier, including a front shell, a rear shell, an air ionizer, a fan, and a front cover. The front shell includes a recessed portion configured to hold a mechanical air filter. The rear shell is attached to the front shell and includes an air outlet. The air ionizer and the fan are disposed in a space defined between the front shell and the rear shell. The front cover is releasably attached to the front shell and configured to allow air to pass therethrough. The fan is configured to draw air through the front cover, the mechanical filter, and an air guide formed in the recessed portion, and to expel air through the air outlet.

The invention belongs to the technical field of environmental protection equipment, and particularly relates to a textile workshop automatic dust filtering device which comprises an outer cylinder, a filtering mechanism used for filtering fiber dust in a textile workshop is arranged in the outer cylinder, and the filtering mechanism comprises a rotatable lower flow guide blade and a rotatable upper flow guide blade. The size of the lower flow guide blade is larger than that of the upper flow guide blade, a rotatable filter cartridge is arranged on the outer side of the lower flow guide blade, a plurality of connecting frames are arranged above the upper flow guide blade, and the connecting frames are arranged in an inclined mode. The friction balls on the surfaces of the matching rods adsorb and roll impurities filtered by the filter cartridge, the filter cartridge is self-cleaned, the situation that fiber chippings adhere to the filter cartridge to affect the air filtering effect of the filter cartridge is avoided, the filtering effect of the filter cartridge can be effectively improved, and the dust filtering efficiency of the dust filtering equipment on a textile workshop can be improved.

Mobile or stationary air filter (L) or room fan (RL) according to Figure 1, comprising an outer wall (5), a (2) for generating an airflow (3) which is guided through an air filter material (1.1), an air inlet (2.1) and an air outlet (2.2), wherein the air filter material (1.1) contains poly(styrenesulfonic acid) (sulfonic acid biocide) (1.3) cross-linked with divinylbenzene and / or an acidic salt (1.3.1) (sulfonic acid biocide salt) of the sulfonic acid biocide (1.3) with biocidal cations, wherein the sulfonic acid biocide (1.3) and / or sulfonic acid biocide salt (1.3.1)(i) are positively and / or materially bonded to and / or in inert carriers and, in the fixed state, are in direct contact with carrier materials (1.1.7) on and / or in which biocidal Metal microparticles of a mean particle size d50 of 0.1 µm to <1,000 µm are fixed, and / or (ii) with carrier materials (1.1.7) on and / or in which biocidal metal microparticles of a mean particle size d50 of 0.1 µm to <1.000 µm are fixed, are mixed; its use and methods for the production and environmentally friendly disposal of air filter materials (1.1).

The invention discloses a low-concentration carbon dioxide trapping system and method, and belongs to the technical field of gas separation and trapping. The system comprises an air filter, a zeolite adsorption rotating wheel, a desorption heater, a desorption fan, a centrifugal fan, a pressure swing adsorption module (at least comprising double towers), a vacuum pump, a CO2 storage tank, a rear-end purification and utilization system and a control system. According to the method, trapping is realized through pretreatment, first-stage adsorption concentration, desorption transfer, second-stage purification, collection and storage and circulating operation. The zeolite adsorption rotating wheel is used for adsorbing and concentrating low-concentration CO2, and then the low-concentration CO2 is purified through the pressure swing adsorption module, so that the problems of low low-concentration trapping efficiency and high energy consumption in the prior art are solved. The device has the advantages of high trapping efficiency, low energy consumption, continuous operation, wide application scene and the like, is suitable for trapping low-concentration CO2 in atmosphere and industrial tail gas, and provides an efficient technical scheme for carbon emission reduction.

The invention provides a clean air main machine with a dispensing device storage bin and a pneumatic dispensing system.The clean air main machine comprises a machine shell, an air source device and an air filtering device are installed in the machine shell, an air outlet port is formed in the machine shell, and the air source device is connected with the air outlet port through the air filtering device; the air outlet end opening is connected with the air inlet end of the medicine dispensing device, a containing bin used for containing the medicine dispensing device is formed in the machine shell, and sterilization equipment is arranged in the containing bin. Before the dispensing device is used, the dispensing device can be placed in the storage bin of the clean air main machine, the sterilizing device in the storage bin is used for sterilizing the dispensing device, the sterilized dispensing device is stored in the storage bin, and bacteria in air are prevented from entering and adhering to the dispensing device to cause pollution.

The invention relates to the technical field of air filters, and discloses a filter assembly and an air dust purification device.The filter assembly comprises a machine body, and an air inlet pipe and an exhaust pipe are fixed to the two ends of the side face of the machine body correspondingly; the air purifier comprises a machine body, a filter element and an assembly frame connected with the filter element, the assembly frame is arranged in the machine body, the filter element divides the machine body into two areas, the area communicated with an air inlet pipe is a first area, and the other area communicated with an exhaust pipe is a second area; the scraping assembly is connected with the machine body, located in the first area and used for scraping the inner wall, located in the first area, of the machine body; the assembly frame is of an arc-shaped structure, a plurality of vent holes are formed in the assembly frame, the filter element communicates with the air outlet ends of the vent holes and is used for filtering dust in air passing through the vent holes, and through the arrangement of the filter assembly and the condensation type spraying assembly, when air enters through the air inlet pipe, the air can be filtered through the filter element; and impurities and particles in the gas are removed.

The invention discloses a low-resistance high-efficiency air filter, and relates to the field of air filters, the low-resistance high-efficiency air filter comprises an upper shell, a lower shell, a ventilation end cover, a supporting shell installed in the upper shell and a filter element arranged in the supporting shell, a conical flow collecting barrel is arranged in the lower shell, the bottom of the conical flow collecting barrel is communicated with a water storage barrel, a connecting support is fixed in the water storage barrel, and the connecting support is connected with the ventilation end cover. A threaded connector is arranged at the bottom of the connecting support. The separation structure is connected between the inner wall of the upper shell and the outer wall of the supporting shell and is used for separating rainwater carried in the airflow; a drainage structure capable of preventing air leakage is arranged in the water storage cylinder; rainwater is separated from air through the arranged separation structure, so that the probability that the filter element is wetted by the rainwater can be greatly reduced, the filter element can effectively intercept dust and impurities, meanwhile, dust can be possibly carried in the rainwater, the dust falls down along with the rainwater, and therefore the filtering burden of the filter element can be relieved.

The invention particularly relates to a micro-hyperbaric oxygen chamber oxygen supply system and a micro-hyperbaric oxygen chamber monitoring system. The micro-hyperbaric oxygen chamber oxygen supply system comprises a data collection module, an oxygen supply module and a monitoring module, the data analysis module is used for respectively analyzing the state information of the compressor, the blockage state information of the air filter and the leakage state information to obtain an abnormal coefficient, a blockage coefficient and a possible leakage coefficient of the compressor; the comprehensive processing module is used for comprehensively processing the compressor abnormal coefficient, the blockage coefficient and the leakage possibility coefficient to obtain a monitoring evaluation coefficient; and a judgment module. According to the method, multi-physical field data fusion and spatial feature analysis are carried out, the system achieves the crossing from single-point threshold value alarm to whole-system health assessment, the current fault can be accurately positioned, potential risks such as the compressor bearing abrasion rate and the filter accumulated dust increasing trend can be predicted through the historical data trend, and the fault diagnosis accuracy is improved. And advanced intervention of preventive maintenance becomes possible.

The invention discloses a liquid air energy storage system based on air separation, which is characterized by comprising an air purification unit, an energy storage unit, an air rectification unit and an LNG (Liquefied Natural Gas) cold supply unit, wherein the air purification unit comprises an air filter, an air compressor, a first cooler, an adsorber and a first heater, and the energy storage unit comprises a first liquid separation tank, a liquid air storage tank, a liquid air pump and an air expansion machine. The air rectification unit comprises a rectification tower, a main cold box, a second liquid separation tank, a second subcooler, a first heat exchanger, a liquid nitrogen storage tank, a liquid oxygen storage tank, a second heat exchanger, an argon rectification system and a liquid argon storage tank; and the LNG cold supply unit comprises a first nitrogen supercharger, a second nitrogen supercharger, an LNG cold box and a first subcooler. The system has the functions of air separation and electric energy storage at the same time, and cold energy of the LNG receiving station is fully utilized for air separation and energy storage to participate in construction of a novel power system of a power grid.

Disclosed herein are replaceable filter frame gaskets and air filters having the same. The gasket is secured elastically to a filter frame of the air filter, making the gasket easily reusable and removable from the air filter.

The composite horizontal numerical control grinding machine comprises a grinding machine table, a polishing mechanism and a middle grinding mechanism, two sliding rails are fixedly installed at the top of the grinding machine table, and a first movable sliding frame is slidably installed on the outer sides of one ends of the two sliding rails; a clamping mechanism is fixedly installed at the top end of the first movable sliding frame. According to the scheme, when smoke dust absorption operation is needed, the powerful fan is started at the moment, air flow firstly passes through the air guide fan blades and rotates along with the hollow rotating shaft to achieve primary pushing, the air flow flows through the hollow rotating shaft and the middle positions of the middle barrel and the outer barrel, and smoke dust at the grinding position is pushed to a lathe five-jaw chuck; the air flow is intercepted and filtered through the step-by-step air filter plates which are distributed step by step, and the filtered smoke dust is stacked on the opposite side of the hollow clamping frame, so that the maintenance box can be conveniently and regularly opened for cleaning, the emission of the smoke dust can be conveniently reduced, and the efficiency of blowing the smoke dust by the air flow and the auxiliary cooling can be improved.

The present invention belongs to the technical field of constant temperature and humidity air-conditioning units, and in particular to a bidirectional energy-saving constant temperature and humidity air-conditioning unit. In view of the problem in the prior art that the fan power will increase once the membrane cloth humidifier is turned on, the following scheme is proposed, including a unit cover with a square tubular structure placed horizontally as a whole, wherein the interior of the unit cover is fixed with a partition frame 1, a partition frame 2 and a sealing baffle with parallel and vertical plate surfaces, an air filter cloth is provided on the surface of the sealing baffle, and an evaporator module is provided in the middle of the partition frame 2, and the space between the partition frame 1 and the partition frame 2 is a humidification space. The present invention can not only allow the airflow to quickly pass through the bell mouth during ventilation and take away the water vapor on the surface of the water-absorbing membrane cloth 1 or the water-absorbing membrane cloth 2 on both sides, but also allow the airflow to quickly and easily pass through the gap between the two adjacent membrane cloths, avoiding the traditional need for pressurization and acceleration to pass through layers of membrane cloth, thereby greatly reducing wind resistance.

The invention relates to the technical field of energy-saving operation and maintenance of an air conditioning system, and discloses an energy-saving air conditioner air filter blockage detection method and system. By introducing the deviation degree of a correlation mode between a fan energy consumption parameter and air pressure parameters before and after a filter as a judgment basis, when the pressure difference change is not obvious, the blockage of the air filter can be detected; and the fan is forced to increase the energy consumption for maintaining the air supply amount. The specific blockage mode with high energy consumption and low efficiency is just hidden blockage which cannot be effectively identified in the prior art. By quantifying the deviation of the correlation mode, the gradual blockage can be timely and accurately found, so that the fan motor is prevented from being in an overload running state for a long time, the equipment abrasion is reduced, the service life is prolonged, and the energy consumption waste of the air conditioning system is obviously reduced.

An air filter for an air filter assembly in an air conditioner is provided, in particular for filtering out particles, preferably pollutants, from air. The air filter contains a filter element with an electrically conductive layer. The air filter also has a housing that partially encompasses a housing interior into which the filter element is inserted. The air filter also has a terminal on the housing that can be contacted from outside the housing interior, which is made of an electrically conductive material and is connected to the conductive layer of the filter element.

The application relates to a pharmaceutical production clean workshop, and relates to the technical field of pharmaceutical production workshops.The pharmaceutical production clean workshop comprises a workshop, a fresh air filtering device, a return air filtering device, a fresh air-return air mixing device and a secondary filtering device arranged in the workshop, the return air filtering device comprises filtering components, adsorption components and disinfection components connected in sequence; the fresh air filtering device performs preliminary purification on fresh air; the return air filtering device removes larger particulate matters in return air through the filtering components, further adsorbs small impurities through the adsorption components, and disinfects and sterilizes the gas through the disinfection components; the fresh air-return air mixing device mixes the processed air, the secondary filtering device performs secondary filtration on the mixed air, and the air quality entering the workshop is ensured. Through the synergistic effect of the components, efficient filtration, adsorption and disinfection treatment of fresh air and return air in the workshop are realized, and the air quality and cleanliness in the workshop are effectively improved.

The utility model discloses a ventilation cooling degerming type transfer box for removing soil disinfection steam, and relates to the technical field of transfer boxes, the ventilation cooling degerming type transfer box comprises a box body, an air inlet is arranged on the box body, and a cleaning assembly is arranged at the air inlet; the cleaning assembly comprises a filter arranged at the air inlet and a measuring unit. A cleaning assembly is arranged at an air inlet of the transfer box, the air filtering effect is guaranteed through the cleaning assembly, the cleaning assembly comprises a filter and a measuring unit used for detecting the pressure difference value of the air inlet end and the air outlet end of the filter, and when the measuring unit detects that the pressure difference value of the air inlet end and the air outlet end of the filter is larger than a set value, the filter is started. The filter can be replaced in time when the air enters the box body, the situation that aerosol and bacteria severely hinder the air from entering the box body is avoided, and the problems that in the prior art, the filter cannot be replaced in time, the aerosol and the bacteria severely hinder the air from entering the box body, and normal use of the transfer box is affected are solved.

An apparatus and methods are provided for an air cleaner to be mounted onto an air inlet of an internal combustion engine. The air cleaner comprises an air filter that includes a filter medium disposed between a curved base and a cover. The curved base provides an interface between the air filter and the air inlet, and comprises a shape that provides clearance between the curved base and an electric choke installed onto a carburetor comprising the air inlet. The cover secures the air filter and the curved base to the air inlet such that an airstream is drawn through the filter medium and is conducted into the air inlet. A raised portion of the cover is configured to cooperate with the curved base to ensure a desired volume of the airstream is available to the air inlet at substantially all engine speeds.

A safety helmet for a firefighter includes an outer shield having a neck opening and a front opening, a hinge located on an upper region of the front opening of the outer shield, a fire-retardant foam liner, a face shield including a sensor carrier attached to the hinge, a particulate air filter, a light emitting diode (LED) light strip, a mask mechanism configured to attach to the tapered nose opening of the transparent screen and the particulate air filter, a heads-up display (HUD) connected to an upper region of a proximal edge of the mask mechanism which faces the tapered nose opening, an oxygen port connected to the mask mechanism, a mask body connected to a distal edge of the mask mechanism, a speaker and microphone unit attached to the mask body, and a regulator nose cone.

Air inlet holes are formed in the surface of the air filter, the self-cleaning air filter comprises a cleaning device, the cleaning device comprises a cleaning frame arranged outside the air filter in a sleeving mode, the cleaning frame is detachably provided with a cleaning brush, and bristles of the cleaning brush abut against the outer wall of the air filter. The cleaning device comprises a driving assembly in transmission connection with the cleaning frame, and the driving assembly drives the cleaning frame to drive the cleaning brush to rotate in the circumferential direction of the air filter so as to brush off sundries at the air inlet holes. In the rotating process of the cleaning frame, the cleaning brush is driven to rotate around the outer wall of the air filter in the circumferential direction, sundries attached to the air inlet holes in the outer wall are cleaned, the situation that the sundries block the air inlet holes is avoided, the cleaning brush conducts cleaning work in the working process of the air filter, the air inlet holes are kept not blocked in the working process of the air filter, and the service life of the air filter is prolonged. The air filter can work stably and reliably, manual cleaning is not needed, the work efficiency can be improved, and potential safety hazards existing in manual operation are avoided.

The invention relates to an air filter. A filter housing has a fixed support element. Flow openings are formed between the struts of the flat support grid. The support element serves to support a filter element. The filter element can be detachably connected to the support element.

The utility model belongs to the technical field of bird breeding, and relates to a multi-sensor controlled intelligent parrot brooding box which comprises a cuboid box body, a sensor box arranged on the inner side wall of the box body and opposite to a box door, a control display box arranged above the box door, and an air inlet fan arranged above the outer side wall of the box body. The switching power supply box is fixed on the inner side wall of the box body and is communicated with the air inlet fan; the ultrasonic humidifier is arranged on the side wall of the box body; wherein two ends of the sensor box are respectively provided with a sensor box air inlet hole and a sensor box air outlet hole, the built-in air filtering sponge covers the sensor box air inlet hole, and the sensor box air inlet fan is fixedly arranged at one end where the sensor box air inlet hole is located and is adjacent to the air filtering sponge; the temperature and humidity sensor and the carbon dioxide sensor are arranged on the inner wall of the sensor box; a single-chip microcomputer is arranged in the control display box, and a liquid crystal screen is arranged outside the control display box. The environment in the brooding box is intelligently controlled through the single chip microcomputer, and the growth and development and breeding production efficiency of nestlings is improved.

The invention relates to the technical field of wastewater treatment, in particular to a comprehensive treatment device and method for selenium-containing wastewater. The device comprises a treatment tank, a tank cover, a treatment disc and a water quality detector, is equipped with a stirring assembly, an impurity removal assembly, a lifting assembly and the like, and is cooperatively controlled through a driving assembly. The air filtering holes of the treatment disc have the functions of filtering and aerating, and the whole process of physical impurity removal, chemical regulation and control, biological treatment and adsorption fine treatment is realized by combining precipitation and injection components and a feeding and air inlet system. According to the method, the selenium form is unified through valence regulation and control, chemical precipitation is enhanced, biological treatment and activated carbon adsorption deep purification are combined, and finally the selenium concentration reaches the standard. Through an automatic monitoring and circulating treatment mechanism, parameters of each stage are accurately controlled, stable and reliable effluent quality is ensured, and the method is suitable for efficient treatment of selenium pollutants in different forms.

When tobacco flakes need to be re-dried in the tobacco flake processing process, the tobacco flakes can be conveyed into a drying box through a conveying assembly, then a heat pump drying assembly is operated to generate hot air, the hot air is conveyed to the lower portion of the drying box, and then the hot air penetrates through an air uniformizing plate to reach the conveying assembly. The tobacco flakes on the conveying assembly are redried and dried, then redried hot air enters the hot air gathering pipeline through all the air collecting assemblies and the air inlet, meanwhile, the hot air is filtered through the air filter net, and the situation that the broken tobacco flakes enter the hot air gathering pipeline is avoided; then hot air is guided back into the heat pump drying assembly through a hot air gathering pipeline to be circularly dried, meanwhile, the difference of the hot air speeds in all the air collecting assemblies can be reduced by controlling the hot air speeds in all the air collecting assemblies, meanwhile, a vibration motor can be operated, the vibration motor drives the conveying assembly to vibrate, and the tobacco flakes on the conveying assembly are flattened.

The invention discloses a small multifunctional integrated drying device, and relates to the technical field of industrial drying experiment equipment. The small multifunctional integrated drying device comprises a bottom plate, a vertical supporting plate is fixedly connected to the middle of the upper surface of the bottom plate, a fluidized bed drying chamber, a spray drying chamber, a main controller, a shared centrifugal fan and a shared electric heater are fixedly installed on the front face of the vertical supporting plate, and an air filter and an induced draft fan are fixedly installed on the upper surface of the bottom plate; a cyclone dust collector is fixedly installed on the back face of the vertical supporting plate, a three-way pipe is fixedly connected to the top of the shared electric heater, a fluidized bed feeder is fixedly installed on one side of the top of the fluidized bed drying chamber, and a supporting ring, an annular base, a motor, a fixing plate and an air pressure sensor are fixedly installed on the lower portion of the inner wall of the fluidized bed drying chamber. The system can integrate the fluidized bed function and the spray drying function, and energy-saving and efficient operation is achieved through the shared air path, the heat energy recovery system and the self-cleaning distribution plate.

Filter media and filters, such as air filters, residential air filters, commercial air filters, face masks, gas turbine and compressor air intake filters, panel filters, and the like, are provided that comprise a plurality of fibers with a silicone-based coating. The silicone-based coating comprises a silicone compound at least about two percent by weight of the coating. The silicone-based coating may include a reactive silicone macroemulsion and a surfactant. The silicone-based coating increases the efficiency of the filter at capturing contaminants, particularly contaminants in the E2 and E3 particle group range, without compromising other important characteristics of the filters, such as cost, longevity, dust holding capacity, and the pressure drop or air permeability of the filter.

The invention provides a plasma-based air filtering device, and relates to the technical field of gas purification devices, the plasma-based air filtering device comprises a multi-stage filtering layer shell, and a catalytic filtering layer, an activated carbon particle filtering layer, an HEPA filtering layer and a flexible plasma filtering layer are independently and detachably mounted on the multi-stage filtering layer shell to form a multi-collaborative filtering system; harmful substances adsorbed in the activated carbon particles are decomposed and eluted through plasmas generated by the flexible plasma filtering layer, so that the activated carbon particles are recycled. According to the air purification device, harmful substances in gas are effectively adsorbed and filtered, activated carbon particles in the activated carbon particle filtering layer can be eluted and purified, the activated carbon particles can be recycled for multiple times, and therefore the air purification cost is reduced, and in addition, compared with a common illumination elution mode in life, the elution mode has the advantage that the purification efficiency is improved. The elution effect is better.

The invention relates to the technical field of filtering equipment, in particular to an air filter and a vacuum pump with the same. The air filter comprises a fixed shell, a filter element assembly, a quick-release upper cover, a quick-locking assembly and an unlocking circular ring, the fixed shell comprises a hollow cylinder, an air inlet side pipe, an air outlet lower pipe, an annular convex edge and a guide lock groove; the filter element assembly comprises a bottom circular ring, a top circular ring, an inner filter ring, a middle filter ring and an outer filter ring; the quick-release upper cover comprises an upper cover body, an upper cover circular cavity, an upper annular groove, a contact disc and a lower annular groove. The quick lock assembly slides into the corresponding guide lock groove to lock the quick release upper cover; the unlocking ring comprises an unlocking ring body, an unlocking ring groove and an active inclined face. According to the air filter provided by the invention, layer-by-layer filtration from coarse to fine can be realized through the three layers of filter rings of the filter element assembly; the filter element assembly and the quick-release upper cover can be conveniently detached. The utility model further discloses a vacuum pump with the air filter.

The invention relates to an air filter with an annular filter element. The filter element can be inserted into a housing transversely to its longitudinal axis. The housing has at least one projection which secures the axial position of the filter element in the installed state. For this purpose, the projection overlaps a securing section of the filter element in a radial direction. The projection can engage in a spread fold of the filter element. Advantageously, a first projection is formed on a housing pot and a second projection is formed on a mounting cover. The mounting cover serves to close a mounting opening in the housing pot through which the filter element can be inserted.

The invention discloses a five-constant system capable of intensively controlling and processing indoor environment, which belongs to the technical field of indoor environment regulation and control, and comprises an indoor unit body arranged indoors, a plurality of partition plates are arranged in the indoor unit body, and the indoor unit body is divided into an air return cavity, a cold and hot water heat exchange cavity, a fresh air heat exchange cavity, a mixed air heat exchange cavity and an air supply cavity; an air return opening and an air supply opening are formed in the upper end of the indoor unit body. A fresh air opening and an exhaust air opening are formed in one side of the indoor unit body. A return air filter is arranged in the return air cavity, a circulating pump and an efficient tank are arranged in the cold and hot water heat exchange cavity, a fresh air fan is arranged in the fresh air heat exchange cavity, a plate exchange module is arranged in the mixed air heat exchange cavity, and an air supply fan, a plate exchange evaporator and a filter element are arranged in the air supply cavity. And the outdoor air source heat pump is connected with the efficient tank. Indoor refrigeration is achieved through the all-air system and the ground cold radiation system in summer, indoor heating is achieved through the all-air system and the ground heating radiation system in winter, and then the five-constant index requirement is met.