CN107246672B - Household fresh air purification full air conditioning system suitable for cold areas - Google Patents
Household fresh air purification full air conditioning system suitable for cold areas Download PDFInfo
- Publication number
- CN107246672B CN107246672B CN201710583092.4A CN201710583092A CN107246672B CN 107246672 B CN107246672 B CN 107246672B CN 201710583092 A CN201710583092 A CN 201710583092A CN 107246672 B CN107246672 B CN 107246672B
- Authority
- CN
- China
- Prior art keywords
- air
- valve
- heat exchanger
- water
- fresh air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
- F24F3/044—Systems in which all treatment is given in the central station, i.e. all-air systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/28—Arrangement or mounting of filters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/30—Arrangement or mounting of heat-exchangers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F7/00—Ventilation
- F24F7/007—Ventilation with forced flow
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
- F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
- F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
- F24F8/108—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering using dry filter elements
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
A household fresh air purification full air conditioning system suitable for cold areas mainly comprises a fresh air purification processor and an air cooling/heating water machine, wherein in the fresh air purification processor, fresh air and return air are mixed and filtered by a coarse filter, heat exchange is carried out between the fresh air and freezing/cooling water in a surface heat exchanger, air treated under the driving of an air feeder flows through a high-efficiency filter and then is sent into a room through an air supply opening, in the air cooling/heating water machine, heat exchange is carried out on a refrigerant by utilizing an air cooling heat exchanger and a water cooling heat exchanger, a cooling water loop of the water cooling heat exchanger is connected with the surface heat exchanger, and the start and stop of an air injection enthalpy-increasing compressor are controlled according to the temperature difference between outdoor temperature and the supply and return water of the freezing/cooling water. The invention realizes the miniaturization application of the central air conditioner, enhances the heating capacity of the heat pump unit in a low-temperature environment, can meet the heating requirement in winter in cold areas, and can also ensure the indoor air quality and thermal comfort requirement in summer and transition seasons.
Description
Technical Field
The invention belongs to the technical field of heating ventilation air conditioners, and particularly relates to a household fresh air purification full air conditioning system suitable for cold regions.
Background
With the improvement of living standard, the requirements of people on the comfort and the health of human living environment are improved. In indoor environmental control of houses, villas, independent offices, and the like, the application of split air conditioners and multi-split air conditioners still accounts for a large share. Many problems occur in the application process, the requirements of users on indoor air quality and environmental comfort cannot be completely met, and the centralized regulation of the indoor environment is carried forward.
First, due to the deterioration of outdoor air quality in recent years, it is desired to create a healthy, clean indoor environment. However, the split air conditioner and the multi-split air conditioner which are commonly used at present can only process temperature and humidity, and the concentration and the CO concentration of PM2.5 can be measured 2 Monitoring and control of parameters such as concentration and TVOC concentration are ineffective. Users can only hope to add additional equipment or open windows to ventilate to solve such problems. However, the addition of equipment and the introduction of untreated fresh air generally do not solve these problems well. Moreover, it is often most convenient to control the indoor environment using a single set of equipment. People hope to achieve multi-parameter accurate regulation of temperature, humidity, air freshness and cleanliness by one set of equipment.
Secondly, according to meteorological data, the air source heat pump can meet the winter heating requirement of cold regions in China only by efficiently and reliably operating for a long time in an atmospheric environment at the temperature of-15 ℃. The common air source heat pump hot water unit on the market in the south at present can not be applied to cold regions in China at the root of: (1) the ambient temperature is reduced, the suction specific volume of the refrigerant is increased, the mass flow of the refrigerant is reduced, and the heating capacity is correspondingly reduced in proportion. The systems with the same number work in a low-temperature environment and show smaller heating capacity; (2) the final heating temperature of the hot water is increased, and the final heating temperature of the hot water is regulated to be 55 ℃ in national standard GB/T21362-2008 heat pump water heater for commercial or industrial and similar purposes. However, in europe and other areas, the temperature of the effluent is required to be 65 ℃ in consideration of the influence of legionella bacteria. Therefore, as people's awareness of health increases, the final heating temperature of hot water may further increase.
Third, the split type air conditioners and multi-split air conditioners for domestic use are not operated in the transition season, but the PM2.5 concentration and CO concentration in the indoor environment are increased 2 The problem of increased concentration still remains, which is very detrimental to the health and comfort of the persons in the room. The problem can be better solved by adopting the central air conditioner which can introduce fresh air and circulating air for purification treatment. The central air conditioner has obvious application advantages in small indoor environment. Therefore, the novel residential and light commercial air conditioning system, namely the household fresh air purification full air conditioning system suitable for cold regions, can well solve the problem while meeting the requirements of health, comfort, beauty and technical performance.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a household fresh air purification full air conditioning system suitable for cold regions, which is characterized in that return air is CO 2 Comparing the concentration with a set value thereof, and controlling the magnitude of the fresh air quantity and the return air quantity and the rotating speed of the air feeder; the opening degree of the water valve is controlled by comparing the return air temperature with a set value. The system can increase the heat absorption capacity of the evaporator and the heat release capacity of the condenser by using the enhanced vapor injection compressor under the condition that the circulating working medium of the evaporator is the same, and is more suitable for cold regions because the heat absorption capacity of the evaporator is increased and the heat release capacity of the condenser is increased compared with the common single-stage compressor; secondly, the system can adjust various technical parameters (indoor temperature and humidity change, PM2.5, CO) of the air conditioning system 2 Concentration) and can carry out regional setting and modification on all parameters, thereby realizing the miniaturization and refinement of the large-scale high-end central air-conditioning system.
In order to achieve the purpose, the invention adopts the technical scheme that:
the utility model provides a family formula new trend purifies total air conditioning system suitable for cold areas, mainly includes new trend purification processor 1 and air-cooled cold/hot water machine, new trend purification processor 1 contains the pipeline that has fresh air inlet 2 and return air inlet 3, and the new trend that fresh air inlet 2 sent into mixes in the mixing section of pipeline with the return air that return air inlet 3 sent into, filters through coarse filter 4, gets into surface heat exchanger 5 and carries out the heat transfer dehumidification with refrigerated water or cooling water, and the air that has handled through surface heat exchanger 5 gets into high efficiency filter 7 under the drive of forced draught blower 6 and filters once more, later send into indoorly by supply-air outlet 8, its characterized in that:
the air-cooled cold/hot water machine comprises an enhanced vapor injection compressor 9, wherein the enhanced vapor injection compressor 9 is connected with a pipe orifice a of a four-way reversing valve 10, a connecting pipeline is provided with a second stop valve 18, a pipe orifice b of the four-way reversing valve 10 is connected with a water-cooled heat exchanger 11, the water-cooled heat exchanger 11 is connected with an inlet of a flash gas-liquid separator 13, a first electronic expansion valve 12 and a first valve 32 are sequentially arranged on the connecting pipeline, a pipe orifice c of the four-way reversing valve 10 is connected with a gas-liquid separator 17, a gas outlet of the gas-liquid separator 17 is connected with the enhanced vapor injection compressor 9 in a return mode, a pipe orifice d of the four-way reversing valve 10 is connected with an air-cooled heat exchanger 16, the air-cooled heat exchanger 16 is connected with the first electronic expansion valve 12, a second electronic expansion valve 15 and a second valve 33 are sequentially arranged on the connecting pipeline, the flash gas-liquid separator 13 is also connected on the pipeline between the second electronic expansion valve 15 and the second valve 33, a gas outlet is connected with the enhanced vapor injection compressor 9 in a return mode, and a first stop valve 14 is arranged on the connecting pipeline, the surface type heat exchanger 5 is communicated with a cooling water loop of the water cooling heat exchanger 11.
An energy storage water tank 29 is arranged on a connecting pipeline of the cooling water loop inlets of the surface heat exchanger 5 and the water cooling heat exchanger 11, a bypass pipeline is arranged between the connecting pipeline and a connecting pipeline of the cooling water loop outlets of the surface heat exchanger 5 and the water cooling heat exchanger 11, and the bypass pipeline is connected with a connecting pipeline of the cooling water loop outlets of the surface heat exchanger 5 and the water cooling heat exchanger 11 through a three-way valve 19.
The opening degree of the three-way valve 19 is controlled by the comparison of the return air temperature and the set temperature, when the return air temperature is close to the set temperature, the opening degree of the main pipeline of the regulating water valve is reduced, and the opening degree of the bypass branch is increased; on the contrary, if the return air temperature deviates from the set temperature, the opening of the main pipeline of the three-way valve is increased, and the opening of the bypass valve is also reduced, so that the water quantity passing through the water-cooled heat exchanger 11 is kept unchanged.
When the four-way reversing valve is in a heating working condition in winter, the pipe orifice a and the pipe orifice b of the four-way reversing valve 10 are communicated in the valve, the pipe orifice c and the pipe orifice d are communicated in the valve, refrigerant of the enhanced vapor injection compressor 9 exchanges heat through the water-cooled heat exchanger 11, the valve 32 is opened, the valve 33 is closed, and the refrigerant after heat exchange is separated by the flash gas-liquid separator 13 and then returns to the enhanced vapor injection compressor 9; cooling water after heat exchange in the water-cooled heat exchanger 11 flows through the three-way valve 19 and then is sent to the surface heat exchanger 5 to exchange heat with air, and the cooling water after heat exchange in the surface heat exchanger 5 returns to the water-cooled heat exchanger 11 to circularly absorb heat;
when the refrigeration working condition in summer or the defrosting in winter is carried out, the pipe orifice a and the pipe orifice d of the four-way reversing valve 10 are communicated in the valve, the pipe orifice b and the pipe orifice c are communicated in the valve, the refrigerant of the enhanced vapor injection compressor 9 exchanges heat through the air-cooled heat exchanger 16, the valve 32 is closed, the valve 33 is opened, the refrigerant does not flow through the flash gas-liquid separator 13, but enters the gas-liquid separator 17 through the water-cooled heat exchanger 11 to be separated and then returns to the enhanced vapor injection compressor 9; the second electronic expansion valve 15 deeply throttles the refrigerant, the refrigerant flows back to the enhanced vapor injection compressor 9 through the gas-liquid separator 17 after exchanging heat in the air-cooled heat exchanger 16, the opening degrees of the first electronic expansion valve 12 and the second electronic expansion valve 15 are jointly controlled according to the outdoor air temperature and the supply and return water temperature difference, and the adjustment of the cooling/heating capacity of the heat pump unit is realized;
when the defrosting is performed, a certain amount of heated hot water is stored in the energy storage water tank 29, so that on one hand, normal operation of circulation is ensured, rapid defrosting of the air-cooled heat exchanger 16 is realized, on the other hand, hot water is continuously provided for the fresh air processor 1, and cold air is prevented from being fed into a room.
In transition seasons, the air-cooled cold and hot water unit does not operate, outdoor fresh air is filtered and purified by the fresh air processing unit and then is sent into a room, ventilation is carried out, and waste heat is eliminated.
A return air temperature sensor 20 and CO are arranged at the return air inlet 3 2 A concentration sensor 21 and a PM2.5 concentration sensor 22; the opening degree of the fresh air valve 23 and the return air valve 24 is set by CO 2 Concentration setpoint and return air CO 2 The concentration is compared to control and regulate if the air returns CO 2 When the concentration exceeds a set value, the opening of the fresh air valve 23 is increased, and the opening of the return air valve 24 is reduced; if CO is present 2 When the concentration is lower than the set value, the opening degree of the fresh air valve 23 is reduced, and the opening degree of the return air valve 24 is reducedIncreasing; the fresh air valve 23 and the return air valve 24 are adjusted in an interlocking manner, namely when the opening degree of the fresh air valve 23 is increased, the opening degree of the return air valve 24 is reduced, when the opening degree of the fresh air valve 23 is reduced, the opening degree of the return air valve 24 is increased, and the rotating speed of the blower 6 is controlled by the concentration of PM2.5 and CO 2 Concentration control when PM2.5 concentration and CO 2 When concentration control is coincident with each other, CO 2 The concentration only controls whether the fresh air valve 23 is opened or not, and the PM2.5 concentration controls the rotating speed of the air feeder 6 to switch between high, medium and low three-gear wind speeds; the opening degree of a three-way valve 19 on a connecting pipeline of the air cooling/water heating machine and the surface type heat exchanger 5 is adjusted according to the comparison of the return air temperature and the set value thereof, when the return air temperature approaches the set value thereof, the proportional adjustment opening degree is reduced, when the three-way valve 19 is fully closed, the basic flow is still provided, and the antifreezing effect is achieved in winter.
The water supply temperature and the water return temperature of the surface type heat exchanger 1 are measured by a water supply temperature sensor 25 and a water return temperature sensor 26, when the opening degree of a proportional control water valve in a three-way valve 19 changes, the water supply temperature difference and the water return temperature difference of the surface type heat exchanger 5 change, and the enhanced vapor injection compressor 9 controls the start or the stop of the enhanced vapor injection compressor according to the outdoor air temperature and the comparison between the water supply temperature difference and the water return temperature difference of the surface type heat exchanger and a set value.
The opening degrees of the fresh air inlet 2 and the return air inlet 3 are respectively adjusted by a fresh air valve 23 and a return air valve 24 which are arranged inside, and minimum air inlet openings are designed on the fresh air valve 23 and the return air valve 24 to ensure that fresh air still has the minimum indoor fresh air quantity under the circulating air mode, and ensure that the return air quantity still has the minimum indoor fresh air quantity under the fresh air mode, so that a certain energy-saving effect is obtained.
The system can be set with two control modes, one is indoor control, the other is remote control of a mobile phone, and the indoor control is divided into a manual mode and an automatic mode;
when a manual mode is adopted, the rotating speed of the air feeder 6 is manually set, the rotating speed of the air feeder 6 is constant at the moment, the change of the return air temperature and the set value is not carried out any more, and the start and stop of the enhanced vapor injection compressor 9 are determined only according to the comparison of the temperature difference between the supply water and the return water and the set value, so that the indoor constant temperature and the constant pressure are kept;
when the automatic mode is adopted, the automatic mode is mainly used for passingCross season of CO 2 The concentration control fresh air valve 23 is opened or not and the rotating speed of the blower 6 is changed when the concentration of PM2.5 and CO are 2 CO when the control commands for the blower 6 are coincident in concentration 2 The concentration only controls whether the fresh air valve 23 is opened or not, and the PM2.5 concentration of return air controls the rotating speed of the blower 6;
when the mobile phone is used for remote control, the operation mode, the wind speed regulation, the indoor temperature, humidity and CO can be selected 2 Concentration, history of PM2.5 concentration and instant condition query.
The surface type heat exchanger 5 adopts a full-countercurrent 8-row pipe design; a water condensation disc 30 is arranged below the surface type heat exchanger 5, the water condensation disc 30 discharges condensed water to the outside through a water condensation discharge pipe 31, a high-efficiency centrifugal fan is adopted for a blower 6, a direct-current brushless motor is configured, an air supply outlet 8 is arranged at the high indoor position, an ABS (acrylonitrile butadiene styrene) or wood air outlet is selected to avoid the condensation of an air outlet, and the air supply direction can be adjusted so that hot air can be more effectively sent to a working area; the air return opening 3 is arranged on the side wall at the height of 50-70 cm from the ground, so that personnel can be ensured to be in a backflow area.
The system works together with an indoor floor heating system, the floor heating system bears heat load, the fresh air purification treatment equipment 1 only bears fresh air load, and the temperature of the treated fresh air is not too high through manual or automatic mode adjustment.
Compared with the prior art, the invention has the beneficial effects that:
1) the invention adopts the fresh air purification processor which can automatically control the fresh air ratio, the return air ratio and the air supply fan, and has better comfort and indoor air quality compared with the traditional air conditioner.
2) The air valves of the fresh air inlet and the return air inlet of the fresh air purification processor are respectively provided with a minimum air inlet so as to ensure that the return air quantity still exists in a fresh air mode and achieve the energy-saving effect, and the fresh air still exists in a circulating air mode and meet the indoor minimum fresh air quantity of 100m 3 The requirement of/h.
3) The forced draught blower adopts high-efficient centrifugal fan, disposes direct current brushless motor, and is efficient, the small in noise for traditional air conditioner. The fresh air purification unit is provided with two-stage filtration (G4+ H12), PM2.5 and most of bacterial mold are effectively filtered, and the filtration efficiency can reach 95%.
4) Compared with the traditional air conditioner, the air injection enthalpy-increasing compressor and the flash gas-liquid separator have strong heating capacity and can meet the winter heating requirement of cold regions in China.
5) The fresh air purification air conditioning unit can be installed in a suspended ceiling of a kitchen or a toilet, and the space can be saved due to the integrated design of the unit. The double air outlets and the double air return inlets of the unit are designed, so that the crossing of pipelines can be avoided, the thickness of an interlayer is reduced, and the space is effectively utilized.
Drawings
FIG. 1 is a schematic diagram of the present invention.
Fig. 2 is a schematic diagram of a fresh air purification processor according to the present invention.
Fig. 3 is a schematic view of the lower drainage structure of the surface heat exchanger of the present invention.
Detailed Description
The embodiments of the present invention will be described in detail below with reference to the drawings and examples.
As shown in figure 1, the frequency conversion household fresh air purification full air conditioning system of the invention is composed of a fresh air purification processor 1 and an air cooling cold/hot water machine.
Referring to fig. 2, the fresh air purification processor 1 comprises a fresh air inlet 2 and two return air inlets 3, fresh air sent by the fresh air inlet 2 and return air sent by the return air inlets 3 are mixed in a mixing section of a pipeline, filtered by a coarse filter 4, enter a surface heat exchanger 5 to exchange heat and dehumidify with chilled water or cooling water, air treated by the surface heat exchanger 5 enters a high-efficiency filter 7 under the driving of a blower 6 to be filtered again, and then is sent into a room through an air supply outlet 8. The air supply outlet 8 is arranged at the high position in a room, an ABS or wood air outlet is selected, the moisture condensation of the air outlet is avoided, the air supply direction can be adjusted, so that hot air can be more effectively sent into a working area, and the phenomenon of upper heating and lower cooling is avoided; the air return opening 3 is arranged on the side wall at the height of 50-70 cm from the ground, so that personnel can be ensured to be in a backflow area. The surface heat exchanger 5 adopts a full-countercurrent 8-row pipe design; referring to fig. 3, a condensate tray 30 is disposed below the surface heat exchanger 5, the condensate tray 30 discharges condensate to the outside through a condensate drain pipe 31, and the blower 6 is a high-efficiency centrifugal fan and is provided with a dc brushless motor.
Referring to fig. 1, the air-cooled water chiller/heater comprises an enhanced vapor injection compressor 9, a four-way reversing valve 10, a water-cooled heat exchanger 11, a first electronic expansion valve 12, a flash gas-liquid separator 13, a first stop valve 14, a second electronic expansion valve 15, an air-cooled heat exchanger 16, a gas-liquid separator 17, a second stop valve 18, a three-way valve 19, a bypass pipeline, an energy storage water tank 29 and the like.
The enhanced vapor injection compressor 9 is connected with a pipe orifice a of a four-way reversing valve 10, a connecting pipeline is provided with a second stop valve 18, a pipe orifice b of the four-way reversing valve 10 is connected with a water-cooling heat exchanger 11, the water-cooling heat exchanger 11 is connected with an inlet of a flash gas-liquid separator 13, a first electronic expansion valve 12 and a first valve 32 are sequentially arranged on the connecting pipeline, a pipe orifice c of the four-way reversing valve 10 is connected with a gas-liquid separator 17, a gas outlet of the gas-liquid separator 17 is connected with the enhanced vapor injection compressor 9 in a return mode, a pipe orifice d of the four-way reversing valve 10 is connected with a wind-cooling heat exchanger 16, the wind-cooling heat exchanger 16 is connected with the first electronic expansion valve 12, a second electronic expansion valve 15 and a second valve 33 are sequentially arranged on the connecting pipeline, the flash gas-liquid separator 13 is also connected on a pipeline between the second electronic expansion valve 15 and the second valve 33, a gas outlet is connected with a middle gas suction port of the enhanced vapor injection compressor 9 in a return mode, and the connecting pipeline is provided with the first stop valve 14, the refrigerant at the air outlet is prevented from generating a backflow phenomenon.
An energy storage water tank 29 is arranged on a connecting pipeline of the cooling water loop inlets of the surface heat exchanger 5 and the water cooling heat exchanger 11, a bypass pipeline is arranged between the connecting pipeline and a connecting pipeline of the cooling water loop outlets of the surface heat exchanger 5 and the water cooling heat exchanger 11, and the bypass pipeline is connected with a connecting pipeline of the cooling water loop outlets of the surface heat exchanger 5 and the water cooling heat exchanger 11 through a three-way valve 19.
When the four-way reversing valve is in a heating working condition in winter, the pipe orifice a and the pipe orifice b of the four-way reversing valve 10 are communicated in the valve, and the pipe orifice c and the pipe orifice d are communicated in the valve, so that the outlet of the enhanced vapor injection compressor 9 is communicated with the material inlet of the water-cooling heat exchanger 11, the valve 32 is opened, and the valve 33 is closed; the refrigerant out of the enhanced vapor injection compressor 9 exchanges heat with cooling water in the water-cooled heat exchanger 11, the cooling water after heat exchange flows through the three-way valve 19 and is sent to the surface heat exchanger 5 to exchange heat with air, and the cooling water after heat exchange in the surface heat exchanger 5 returns to the water-cooled heat exchanger 11 to circularly absorb heat. The refrigerant after heat exchange in the water-cooling heat exchanger 11 enters the flash gas-liquid separator 13 through the first electronic expansion valve 12 and the valve 32, after separation, the refrigerant returns to the middle air suction port of the enhanced vapor injection compressor 9, and the exhaust volume of the enhanced vapor injection compressor 9 is increased, so that the flow of the refrigerant in the water-cooling heat exchanger 11 is increased, and the heating capacity is improved; on the other hand, the second electronic expansion valve 15 deeply throttles the liquid refrigerant discharged from the flash gas-liquid separator 13 to realize low-temperature heat extraction, and the part of the refrigerant exchanges heat in the air-cooled heat exchanger 16 and then flows back to the enhanced vapor injection compressor 9 through the gas-liquid separator 17; the opening degrees of the first electronic expansion valve 12 and the second electronic expansion valve 15 are jointly controlled according to the outdoor air temperature and the supply and return water temperature difference, so that the cold/heat supply capacity of the heat pump unit is adjusted.
When the refrigeration working condition in summer or the defrosting in winter is carried out, the pipe orifice a and the pipe orifice d of the four-way reversing valve 10 are communicated in the valve, and the pipe orifice b and the pipe orifice c are communicated in the valve, so that the outlet of the enhanced vapor injection compressor 9 is communicated with the inlet of the air-cooled heat exchanger 16. Valve 32 is closed and valve 33 is opened so that refrigerant does not flow through flash tank 13.
When the defrosting operation is performed, a certain amount of heated hot water is stored in the energy storage water tank 29, so that on one hand, the normal operation of circulation can be ensured, the rapid defrosting of the air-cooled heat exchanger is realized, on the other hand, the supply of hot water to the fresh air processor can be continuously ensured, and the cold air feeding into the room is avoided.
In transition seasons, the air-cooled cold and hot water unit does not operate, outdoor fresh air is filtered and purified by the fresh air processing unit and then is sent into a room, ventilation is carried out, and waste heat is eliminated.
When the variable-frequency household fresh air purification full air conditioning system works, the return air temperature sensor 20 and CO are arranged at the return air inlet 3 2 A concentration sensor 21 and a PM2.5 concentration sensor 22; the opening degree of the fresh air valve 23 and the return air valve 24 is controlled by CO 2 Concentration setpoint and return air CO 2 Control and regulation of concentration, e.g. CO 2 The set point of the concentration is 500PPM, if the CO of the return air 2 When the concentration exceeds a set value, the opening of the fresh air valve 23 is increased, and the opening of the return air valve 24 is reduced; if CO is present 2 When the concentration is lower than the set value, the opening degree of the fresh air valve 23 is reduced, and the opening degree of the return air valve 24 is increased;the fresh air valve 23 and the return air valve 24 are adjusted in a linkage mode, namely when the opening degree of the fresh air valve 23 is increased, the opening degree of the return air valve 24 is reduced. The rotating speed of the fan 6 provided with the direct current brushless motor is controlled by PM2.5 concentration and CO 2 Concentration control when PM2.5 concentration and CO 2 When concentration control is coincident with each other, CO 2 The concentration only controls whether the fresh air valve 23 is opened or not, and the PM2.5 concentration controls the rotating speed of the blower 6.
The opening degree of the three-way valve 19 is controlled by the comparison of the return air temperature and the set temperature, when the return air temperature is close to the set temperature, the opening degree of the main pipeline of the regulating water valve is reduced, and the opening degree of the bypass branch is increased; on the contrary, if the return air temperature deviates from the set temperature, the opening of the main pipeline of the three-way valve is increased, and the opening of the bypass valve is also reduced, so that the water quantity passing through the water-cooled heat exchanger 11 is kept unchanged. When the three-way valve 19 is fully closed, basic flow is still available, and the antifreezing effect can be achieved in winter.
The supply and return water temperatures of the surface heat exchanger are measured by a supply water temperature sensor 25 and a return water temperature sensor 26, when the opening degree of a proportional control water valve in a three-way valve 19 on a connecting pipeline of the air cooling cold/hot water machine and the surface heat exchanger 5 is changed, the supply and return water temperature difference of the surface heat exchanger 5 is changed, and the jet enthalpy-increasing compressor 9 is controlled to be started or stopped according to the comparison of the supply and return water temperature difference of the surface heat exchanger and a set value.
The opening degree of the fresh air inlet 2 and the opening degree of the return air inlet 3 are respectively adjusted by a fresh air valve 23 and a return air valve 24 which are arranged inside, and minimum air inlet openings are designed on the fresh air valve 23 and the return air valve 24 so as to ensure that fresh air still exists in a circulating air mode and meet the requirement of indoor minimum fresh air (about 100 m) 3 And/h), the air return quantity in a full fresh air mode can be ensured, and a certain energy-saving effect is obtained.
The system of the invention has two control modes, one is indoor control, and the other is mobile phone remote control. The indoor control is further classified into a manual mode (air-conditioning mode) and an automatic mode. When the manual mode is adopted, the rotating speed of the air blower 6 is manually set, at the moment, the rotating speed of the air blower 6 is not changed any more and is not changed by comparing the return air temperature with the set value, and the starting of the enhanced vapor injection compressor 9 is determined only according to the comparison between the temperature difference between the supply water and the return water and the set valueStopping to keep the indoor constant temperature and pressure; when the automatic mode is adopted, the air-cooled cold/hot water machine is not recommended to be started, is mainly used in transition seasons, and is formed by CO 2 The concentration control fresh air valve 23 is opened or not and the rotating speed of the blower 6 is changed when the concentration of PM2.5 and CO are 2 CO when the control commands for the blower 6 are coincident in concentration 2 The concentration only controls whether the fresh air valve 23 is opened or not, and the PM2.5 concentration of return air controls the rotating speed of the blower 6.
When the mobile phone is used for remote control, the operation mode, the wind speed regulation, the indoor temperature, humidity and CO can be selected 2 Concentration, history of PM2.5 concentration and instant condition query.
The system can also work together with an indoor floor heating system, the floor heating system bears heat load (the temperature of floor heating water supply is kept at 35-40 ℃), and the fresh air purification treatment equipment 1 only bears fresh air load and can be adjusted in a manual or automatic mode to ensure that the temperature of the treated fresh air is not too high and heat discomfort is caused.
To sum up, the invention relates to a household fresh air purification full air conditioning system suitable for cold areas, which mainly comprises a fresh air purification processor and an air cooling/heating machine, wherein in the fresh air purification processor, fresh air and return air are mixed in a mixing section, are filtered by a coarse filter, exchange heat with freezing/cooling water in a surface heat exchanger, air treated under the driving of a variable frequency blower flows through a high-efficiency filter and then is sent into a room through two air supply outlets, and the opening degrees of a fresh air valve and a return air valve are according to the CO of the return air 2 The concentration is adjusted, and the rotating speed of the air supply fan is adjusted according to CO 2 And PM2.5 concentration regulation, the opening of a proportional three-way valve in a water path connecting the air-cooled cold/hot water machine and the surface air cooler in the fresh air processor is regulated according to the difference value between the return air temperature and the set value of the return air temperature, and the start and stop of the enhanced vapor injection compressor are controlled according to the outdoor temperature and the temperature difference between the freezing/cooling water supply and return water. The invention realizes the miniaturization application of the central air conditioner by adjusting the temperature, the humidity and the CO 2 Concentration and PM2.5 concentration regulation, which provides healthy and comfortable indoor environment all the year round to the maximum extent and improves the comfort, in addition, because of adopting the enhanced vapor injection technology, the heating energy of the heat pump unit in the low-temperature environment is greatly enhancedThe air conditioning system can be operated efficiently and reliably for a long time in a low-temperature environment of 15 ℃ below zero, the winter heating requirement of cold regions in China is met, and the annual air conditioning requirement can be ensured.
Claims (7)
1. The utility model provides a full air conditioning system of family formula new trend purification suitable for cold areas mainly includes new trend purification processor (1) and air-cooled/hot water machine, new trend purification processor (1) contains the pipeline that has fresh air inlet (2) and return air inlet (3), and the new trend that fresh air inlet (2) were sent into mixes in the mixing section of pipeline with the return air that return air inlet (3) were sent into, filters through coarse filter (4), gets into surface heat exchanger (5) and refrigerated water or cooling water and carries out the heat transfer dehumidification, and the air of handling through surface heat exchanger (5) gets into high efficiency filter (7) under forced draught blower (6) drive and filters once more, later send into indoorly by supply-air outlet (8), its characterized in that:
the air-cooled cold/hot water machine comprises an enhanced vapor injection compressor (9), the enhanced vapor injection compressor (9) is connected with a pipe orifice a of a four-way reversing valve (10) and is provided with a second stop valve (18) on a connecting pipeline, a pipe orifice b of the four-way reversing valve (10) is connected with a water-cooled heat exchanger (11), the water-cooled heat exchanger (11) is connected with an inlet of a flash gas-liquid separator (13), a first electronic expansion valve (12) and a first valve (32) are sequentially arranged on the connecting pipeline, a pipe orifice c of the four-way reversing valve (10) is connected with a gas-liquid separator (17), a gas outlet of the gas-liquid separator (17) is connected with the enhanced vapor injection compressor (9) in a return mode, a pipe orifice d of the four-way reversing valve (10) is connected with a first air-cooled heat exchanger (16), the air-cooled heat exchanger (16) is connected with the first electronic expansion valve (12) and is sequentially provided with the second electronic expansion valve (15) and the second valve (33) on the connecting pipeline, and the flash gas-liquid separator (13) is further connected with a pipeline between the second electronic expansion valve (15) and the second valve (33) on the connecting pipeline The gas outlet is connected with the enhanced vapor injection compressor (9) in a return way, a first stop valve (14) is arranged on a connecting pipeline, and the surface type heat exchanger (5) is communicated with a cooling water loop of the water cooling heat exchanger (11);
a return air temperature sensor (20) and CO are arranged at the return air inlet (3) 2 Concentration sensor (21)And a PM2.5 concentration sensor (22); the opening degree of the fresh air valve (23) and the return air valve (24) is controlled by CO 2 Concentration setpoint and return air CO 2 The concentration is compared to control and regulate if the air returns CO 2 When the concentration exceeds a set value, the opening degree of the fresh air valve (23) is increased, and the opening degree of the return air valve (24) is reduced; if CO is present 2 When the concentration is lower than the set value, the opening degree of the fresh air valve (23) is reduced, and the opening degree of the return air valve (24) is increased; the fresh air valve (23) and the return air valve (24) are adjusted in an interlocking mode, namely when the opening degree of the fresh air valve (23) is increased, the opening degree of the return air valve (24) is reduced, when the opening degree of the fresh air valve (23) is reduced, the opening degree of the return air valve (24) is increased, and the rotating speed of the air feeder (6) is adjusted according to the PM2.5 concentration and the CO 2 Concentration control when PM2.5 concentration and CO 2 When concentration control is coincident with each other, CO 2 The concentration only controls whether a fresh air valve (23) is opened or not, and the PM2.5 concentration controls the rotating speed of a blower (6) to switch between high, medium and low three-gear wind speeds; the opening degree of a three-way valve (19) on a connecting pipeline of the air cooling cold/hot water machine and the surface type heat exchanger (5) is adjusted according to the comparison of the return air temperature and the set value thereof, when the return air temperature approaches the set value thereof, the proportional adjustment opening degree is reduced, when the three-way valve (19) is fully closed, the basic flow is still provided, and the antifreezing effect is achieved in winter;
the opening degrees of the fresh air inlet (2) and the return air inlet (3) are respectively adjusted by a fresh air valve (23) and a return air valve (24) which are arranged inside, and minimum air inlet openings are respectively designed on the fresh air valve (23) and the return air valve (24) so as to ensure that fresh air still exists in a circulating air mode, meet the requirement of minimum indoor fresh air, and ensure that return air still exists in the fresh air mode at the same time, thereby obtaining a certain energy-saving effect;
an energy storage water tank (29) is arranged on a connecting pipeline of the cooling water loop inlet of the surface type heat exchanger (5) and the water cooling heat exchanger (11), a bypass pipeline is arranged between the connecting pipeline and a connecting pipeline of the cooling water loop outlet of the surface type heat exchanger (5) and the water cooling heat exchanger (11), and the bypass pipeline is connected with a connecting pipeline of the cooling water loop outlet of the surface type heat exchanger (5) and the water cooling heat exchanger (11) through a three-way valve (19);
the opening degree of the three-way valve (19) is controlled by the comparison of the return air temperature and the set temperature, when the return air temperature is close to the set temperature, the opening degree of the main water valve pipeline is reduced, and the opening degree of the bypass branch is increased; on the contrary, if the return air temperature deviates from the set temperature, the opening degree of the main pipeline of the three-way valve is increased, and the opening degree of the bypass valve is also reduced, so that the water quantity passing through the water-cooling heat exchanger (11) is kept unchanged.
2. The household fresh air purifying full air conditioning system suitable for cold regions as claimed in claim 1,
when the four-way reversing valve is in a heating working condition in winter, a pipe orifice a and a pipe orifice b of the four-way reversing valve (10) are communicated in the valve, a pipe orifice c and a pipe orifice d are communicated in the valve, a refrigerant of the enhanced vapor injection compressor (9) exchanges heat through the water-cooling heat exchanger (11), a valve I (32) is opened, a valve II (33) is closed, and the refrigerant after heat exchange is separated by the flash gas-liquid separator (13) and then returns to the enhanced vapor injection compressor (9); cooling water after heat exchange in the water-cooled heat exchanger (11) passes through a three-way valve (19) and then is sent to the surface heat exchanger (5) to exchange heat with air, and cooling water after heat exchange of the surface heat exchanger (5) returns to the water-cooled heat exchanger (11) to circularly absorb heat;
when the refrigeration working condition in summer or the defrosting in winter is carried out, a pipe orifice a and a pipe orifice d of a four-way reversing valve (10) are communicated in the valve, a pipe orifice b and a pipe orifice c are communicated in the valve, a refrigerant of the enhanced vapor injection compressor (9) exchanges heat through an air-cooled heat exchanger (16), a valve I (32) is closed, a valve II (33) is opened, the refrigerant does not flow through a flash gas-liquid separator (13), but enters a gas-liquid separator (17) through a water-cooled heat exchanger (11) to be separated and then returns to the enhanced vapor injection compressor (9); the electronic expansion valve II (15) is used for deeply throttling the refrigerant, the refrigerant flows back to the enhanced vapor injection compressor (9) through the gas-liquid separator (17) after heat exchange in the air-cooled heat exchanger (16), and the opening degrees of the electronic expansion valve I (12) and the electronic expansion valve II (15) are jointly controlled according to the outdoor air temperature and the supply and return water temperature difference, so that the adjustment of the cooling/heating capacity of the heat pump unit is realized;
when the defrosting is in a working condition, a certain amount of hot water is stored in the energy storage water tank (29), on one hand, the normal operation of circulation is ensured, the quick defrosting of the air-cooled heat exchanger (16) is realized, on the other hand, the hot water is continuously provided for the fresh air processor (1), and the cold air is prevented from being fed into the room;
in transition seasons, the air-cooled cold and hot water unit does not operate, outdoor fresh air is filtered and purified by the fresh air processing unit and then is sent into a room, ventilation is carried out, and waste heat is eliminated.
3. The household fresh air purification full air conditioning system suitable for the cold regions as claimed in claim 1, wherein the supply and return water temperatures of the surface heat exchanger (5) are measured by a supply water temperature sensor (25) and a return water temperature sensor (26), when the opening degree of a proportional control water valve in a three-way valve (19) changes, the supply and return water temperature difference of the surface heat exchanger (5) changes, and the jet enthalpy-increasing compressor (9) is controlled to be started or stopped according to the outdoor air temperature and the comparison between the supply and return water temperature difference of the surface heat exchanger and a set value.
4. The household fresh air purifying full air conditioning system suitable for the cold regions as claimed in claim 1, wherein the system is provided with two control modes, one is indoor control, the other is remote control of a mobile phone, and the indoor control is divided into a manual mode and an automatic mode;
when a manual mode is adopted, the rotating speed of the air feeder (6) is manually set, the rotating speed of the air feeder (6) is constant at the moment, the rotating speed is not changed by comparing the return air temperature with the set value of the return air temperature, and the start and stop of the enhanced vapor injection compressor (9) are determined only according to the comparison between the temperature difference of the supply water and the return water and the set value of the return water temperature, so that the indoor constant temperature and the indoor constant pressure are kept;
when the automatic mode is adopted, the automatic mode is mainly used in transition seasons and is formed by CO 2 The concentration control fresh air valve (23) is opened or not and the rotating speed of the blower (6) is changed when the concentration of PM2.5 and CO are 2 CO when the control instruction of the concentration to the blower (6) is coincident 2 The concentration only controls whether the fresh air valve (23) is opened or not, and the PM2.5 concentration of return air controls the rotating speed of the blower (6);
when the mobile phone is used for remote control, the mobile phone canSelecting operation mode, adjusting wind speed, indoor temperature, humidity and CO 2 Concentration, history of PM2.5 concentration and instant condition query.
5. The household fresh air purifying full air conditioning system suitable for the cold regions as claimed in claim 1, wherein the surface heat exchanger (5) adopts a full countercurrent 8-row pipe design; a condensate tray (30) is arranged below the surface type heat exchanger (5), condensate water is discharged to the outside of a room through a condensate discharge pipe (31) by the condensate tray (30), a blower (6) adopts a high-efficiency centrifugal fan and is provided with a direct-current brushless motor, an air supply opening (8) is arranged at an indoor high position, an ABS (acrylonitrile butadiene styrene) or wood air outlet is selected, the air outlet is prevented from dewing, and the air supply direction can be adjusted, so that hot air can be more effectively sent into a working area; the air return opening (3) is arranged on the side wall 50-70 cm away from the ground, so that personnel can be ensured to be in a backflow area.
6. The household fresh air purification full air conditioning system suitable for the cold areas as claimed in claim 1, wherein the system works in combination with an indoor floor heating system, the floor heating system bears heat load, the fresh air purification processor (1) only bears fresh air load, and the temperature of the treated fresh air is not too high through adjustment in a manual or automatic mode.
7. The household fresh air purifying full air conditioning system suitable for the cold regions as claimed in claim 2, wherein a first stop valve (14) is arranged at the middle air suction outlet of the flash gas-liquid separator (13) connected with the enhanced vapor injection compressor (9) to prevent the refrigerant at the air suction outlet from generating a backflow phenomenon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710583092.4A CN107246672B (en) | 2017-07-17 | 2017-07-17 | Household fresh air purification full air conditioning system suitable for cold areas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710583092.4A CN107246672B (en) | 2017-07-17 | 2017-07-17 | Household fresh air purification full air conditioning system suitable for cold areas |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107246672A CN107246672A (en) | 2017-10-13 |
| CN107246672B true CN107246672B (en) | 2022-08-30 |
Family
ID=60014870
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710583092.4A Active CN107246672B (en) | 2017-07-17 | 2017-07-17 | Household fresh air purification full air conditioning system suitable for cold areas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107246672B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019084918A1 (en) | 2017-11-03 | 2019-05-09 | Beijing Didi Infinity Technology And Development Co., Ltd. | System and method for determining a trajectory |
| CN109084452B (en) * | 2018-08-30 | 2021-11-19 | 青岛海信日立空调***有限公司 | Air conditioner control method and air conditioner |
| CN113685920A (en) * | 2021-09-07 | 2021-11-23 | 国机中兴工程咨询有限公司 | Normal and emergency working condition conversion method for all-air primary return air conditioning system |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20100094163A (en) * | 2009-02-18 | 2010-08-26 | 삼우시스템 (주) | Air conditioning system for subway station |
| CN102435002A (en) * | 2011-09-22 | 2012-05-02 | 厦门同力节能科技有限公司 | Improved device for efficient energy-saving household central air-conditioning |
| CN202403347U (en) * | 2011-12-19 | 2012-08-29 | 东南大学 | Air treatment device |
| CN202734344U (en) * | 2012-07-05 | 2013-02-13 | 泰豪科技股份有限公司 | Low temperature enthalpy increasing family type central air conditioner |
| CN104596166A (en) * | 2013-10-31 | 2015-05-06 | 海尔集团公司 | Air conditioner and air supplying and enthalpy adding method thereof |
| CN104006503B (en) * | 2014-06-17 | 2017-02-08 | 中山市爱美泰电器有限公司 | Control device and method of heat pump heating and cooling system |
| CN104214857A (en) * | 2014-07-21 | 2014-12-17 | 王天祥 | Serialized direct evaporation type ice-water cold accumulation double-cold-source air conditioning system |
| CN204786869U (en) * | 2015-07-14 | 2015-11-18 | 李岩娟 | Clean wind oxygen suppliment intelligence all -in -one |
| CN106678992A (en) * | 2017-03-08 | 2017-05-17 | 孙金鹏 | Intelligent fresh and return air volume adjusting type air purifier |
| CN207146721U (en) * | 2017-07-17 | 2018-03-27 | 西安建筑科技大学 | A kind of full air-conditioning system of family formula fresh air purifying suitable for cold district |
-
2017
- 2017-07-17 CN CN201710583092.4A patent/CN107246672B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN107246672A (en) | 2017-10-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107228428B (en) | Household fresh air purification full air conditioning system | |
| CN107218665B (en) | Frequency conversion household type fresh air purification full air conditioning system | |
| CN106678991B (en) | Fresh air handling unit regulation and control system suitable for radiation air conditioner and control method thereof | |
| KR100933515B1 (en) | Energy saving thermo-hygrostat using coolants in cooling tower and its controlling method thereof | |
| CN111306646B (en) | Control method of fresh air conditioner | |
| CN211041202U (en) | Fresh air humidifying unit with double cold and heat sources | |
| CN209341472U (en) | Fresh air reheating type heat pump recuperation of heat air-conditioner set | |
| CN103900174A (en) | Dual-temperature radiation heat pump type room air conditioner capable of processing fresh air | |
| CN101294755A (en) | Air-conditioning unit with constant temperature and humidity | |
| CN109595704B (en) | Efficient swimming pool heat pump dehumidifier and working method thereof | |
| CN107246672B (en) | Household fresh air purification full air conditioning system suitable for cold areas | |
| CN111442448A (en) | Combined air conditioning unit for independently cooling and dehumidifying fresh air | |
| CN104033986B (en) | Total heat recovery type is collapsible to be sent, return, the control method of air draft integrated air conditioner unit | |
| CN108286755A (en) | A kind of air-treatment unit of included low-temperature receiver | |
| CN114562766A (en) | Fresh air handling unit and method | |
| CN110779233A (en) | Air source heat pump air conditioner floor heating hot water unit | |
| CN207146539U (en) | A kind of full air-conditioning system of frequency conversion family formula fresh air purifying | |
| CN209763409U (en) | Fresh air fan capable of adjusting temperature in winter and summer | |
| CN112539488A (en) | Capillary tube radiation double-cold-source total-heat fresh air dehumidification air conditioning all-in-one machine set | |
| CN219530996U (en) | Constant temperature and humidity clean air conditioning unit and clean workshop | |
| CN209415686U (en) | A kind of fresh air conditioner system suitable for passive type pole low energy-consumption house | |
| CN203785141U (en) | Dual temperature radiation heat pump room air conditioner capable of disposing fresh air | |
| CN110715375A (en) | Exhaust air heat recovery type fresh air dehumidifying unit and working method thereof | |
| CN216431958U (en) | Bypass oxygenation and isothermal difference refrigeration fresh air dehumidifier | |
| CN214148201U (en) | Capillary tube radiation double-cold-source total-heat fresh air dehumidification air conditioning all-in-one machine set |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |