CN111442449A - Double-fan combined air conditioning unit with independent cold source - Google Patents

Double-fan combined air conditioning unit with independent cold source Download PDF

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Publication number
CN111442449A
CN111442449A CN202010197804.0A CN202010197804A CN111442449A CN 111442449 A CN111442449 A CN 111442449A CN 202010197804 A CN202010197804 A CN 202010197804A CN 111442449 A CN111442449 A CN 111442449A
Authority
CN
China
Prior art keywords
air
coil
inlet
outlet
air conditioning
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.)
Pending
Application number
CN202010197804.0A
Other languages
Chinese (zh)
Inventor
路建岭
唐辉强
袁东波
张饶
许伟杭
吴培浩
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangdong Construction Project Quality Safety Inspection Station Co ltd
Original Assignee
Guangdong Construction Project Quality Safety Inspection Station Co ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Guangdong Construction Project Quality Safety Inspection Station Co ltd filed Critical Guangdong Construction Project Quality Safety Inspection Station Co ltd
Priority to CN202010197804.0A priority Critical patent/CN111442449A/en
Publication of CN111442449A publication Critical patent/CN111442449A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F7/00Ventilation
    • F24F7/04Ventilation with ducting systems also by double walls; with natural circulation
    • F24F7/06Ventilation with ducting systems also by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit
    • F24F7/065Ventilation with ducting systems also by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit fan combined with single duct; mounting arrangements of a fan in a duct
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/62Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63Electronic processing
    • F24F11/65Electronic processing for selecting an operating mode
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/89Arrangement or mounting of control or safety devices
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/28Arrangement or mounting of filters
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/30Arrangement or mounting of heat-exchangers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24HFLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H3/00Air heaters
    • F24H3/02Air heaters with forced circulation
    • F24H3/06Air heaters with forced circulation the air being kept separate from the heating medium, e.g. using forced circulation of air over radiators
    • F24H3/08Air heaters with forced circulation the air being kept separate from the heating medium, e.g. using forced circulation of air over radiators by tubes

Abstract

The invention discloses a double-fan combined air conditioning unit with an independent cold source.A cabinet body of the air conditioning unit is provided with an air inlet, an air supply outlet and an air return inlet, and a primary filter, a first refrigeration coil, a first heating coil, a first filter, a first centrifugal fan, a second refrigeration coil, a second heating coil, an auxiliary heating source, a humidifier, a second centrifugal fan and a second filter are arranged in the cabinet body; the air conditioner outdoor unit is internally provided with a compressor and a condenser, a first refrigerating coil outlet and a second refrigerating coil outlet are connected with an inlet of the compressor, an outlet of the compressor is connected with an inlet of the condenser, an inlet of the first heating coil and an inlet of the second heating coil, an outlet of the condenser is connected with an outlet of the first heating coil and an outlet of the second heating coil, the outlet of the condenser is divided into two paths, one path is connected with the inlet of the first refrigerating coil through a first throttling device, and the other path is connected with the inlet of the second refrigerating coil through a second throttling device. The invention enhances the cooling and dehumidifying capability, saves energy and operates, and has stronger adaptability due to the double fans.

Description

Double-fan combined air conditioning unit with independent cold source
Technical Field
The invention relates to a combined air conditioning unit, in particular to a double-fan combined air conditioning unit with an independent cold source.
Background
Along with the increasing living standard of people, the requirements of people on living and working environments are higher and higher, and especially the requirements on fresh air and thermal comfort are more and more emphasized. At present, for places which are not easy to set or use a concentrated cold source for a long time and have higher requirements on indoor temperature and humidity, such as high-grade villas, non-exclusive small hotels, high-grade office areas in a working normal state and the like, most of air conditioning systems of the places have the following defects:
⑴ when the split air conditioner or multi-split air conditioner is adopted, the air conditioning system can not provide fresh air, the fresh air is obtained by natural ventilation or simple mechanical ventilation by opening doors and windows, which not only causes the loss and waste of air conditioning cold energy and increases the energy consumption of the air conditioner, but also brings outdoor pollutants (such as dust, automobile exhaust, PM2.5, etc.) and noise into the room when the fresh air is directly fed into the room without treatment, and further, in humid seasons in southern areas, a large amount of fresh air which is not controlled and treated enters the room to aggravate the phenomenon of indoor moisture regain and mildew.
⑵ when a fan coil and an independent fresh air system or a full air system are adopted, a concentrated cold source is usually used, but due to the fact that the working and rest time of the non-independent small hotel, the high-grade office area in a normal working state in overtime and other areas of the same air conditioning system is inconsistent, the phenomenon of 'big horse drawing small cars' exists when the air conditioning system is used in the places at night or other non-uniform time periods, the air conditioning system is caused to operate inefficiently, the air conditioning use cost is obviously higher than usual, and energy conservation and economy are achieved.
The defects of the existing air conditioning system influence the normal and efficient operation of places such as high-grade villas, non-independent small hotels, high-grade office areas with overtime normality and the like to a certain extent, so that a set of combined air conditioning unit capable of overcoming the defects is needed to be designed to meet the special requirements of the places.
Disclosure of Invention
The invention aims to provide a double-fan combined air conditioning unit with an independent cold source, which improves the cooling and dehumidifying effects, reduces the electric energy consumption, realizes energy-saving operation, independently regulates and controls the temperature and the humidity, is flexible in installation and arrangement and has strong adaptability.
The object of the invention is achieved by the following technical measures: a double-fan combined air conditioning unit with an independent cold source is characterized by comprising a controller, an air conditioning unit cabinet body and an air conditioning outdoor unit, wherein the air conditioning unit cabinet body comprises a cabinet and all components arranged in the cabinet, the cabinet is provided with an air inlet, an air supply outlet and a return air inlet communicated with an indoor environment, each component is sequentially provided with a primary filter, a first refrigeration coil, a first heating coil, a first filter, a first centrifugal fan, a second refrigeration coil, a second heating coil, an auxiliary heating source, a humidifier, a second centrifugal fan and a second filter from the air inlet to the air supply outlet, the components divide the internal space of the cabinet into a plurality of compartments, and the return air inlet is positioned between the first filter and the first centrifugal fan; the air conditioner outdoor unit is internally provided with a compressor and a condenser, an outlet of the first refrigeration coil and an outlet of the second refrigeration coil are respectively connected with an inlet of the compressor, an outlet of the compressor is respectively connected with an inlet of the condenser, an inlet of the first heating coil and an inlet of the second heating coil, an outlet of the condenser is connected with an outlet of the first heating coil and an outlet of the second heating coil and is divided into two pipelines, one pipeline is connected with the inlet of the first refrigeration coil through a first throttling device, and the other pipeline is connected with the inlet of the second refrigeration coil through a second throttling device, so that a circulation loop with a refrigerant flowing inside is formed.
The air conditioner provided by the invention is provided with an independent cold source, is flexible to install and arrange, adopts the direct evaporation refrigeration coil to cool and dehumidify fresh air, enhances the cooling and dehumidifying capacity of the air conditioning unit, and is provided with two heating coils to fully utilize the condensation heat of the air conditioning outdoor unit, thereby reducing the emission of the condensation heat, being beneficial to environmental protection, effectively avoiding the cold and heat offset phenomenon, reducing the electric energy consumption, greatly improving the energy efficiency of the self-provided cold source, realizing energy-saving operation, and realizing independent control of temperature and humidity. The double-fan arrangement greatly improves the adjusting function of the air quantity and the air pressure of the combined air conditioning unit and has stronger adaptability. The invention is suitable for places with higher requirements on temperature and humidity, is particularly suitable for places where concentrated cold sources are not easy to arrange, and can meet the requirements of users on fresh air and thermal comfort all the year round.
As a preferred embodiment of the present invention, a first solenoid valve is disposed on a connection pipe between an outlet of the compressor and an inlet of the first heating coil, a second solenoid valve is disposed on a connection pipe between the outlet of the compressor and an inlet of the second heating coil, a third solenoid valve is disposed on a connection pipe between the outlet of the compressor and an inlet of the condenser, and the first, second, and third solenoid valves are respectively connected to a controller, so that heat dissipation amounts through the first heating coil, the second heating coil, and the condenser can be flexibly adjusted to meet a demand for appropriately heating air in the present invention.
In a preferred embodiment of the present invention, the first filter is an intermediate-efficiency filter, is located on the upstream side of the first centrifugal fan, and is configured to filter fresh outdoor air, and the second filter is an intermediate-efficiency filter or a sub-high-efficiency filter, is located on the downstream side of the second centrifugal fan, and is configured to filter mixed fresh and return air.
As a preferred embodiment of the present invention, the compressor is a variable frequency compressor, and the refrigerating capacities of the first refrigerating coil and the second refrigerating coil can be adjusted in time according to the change of the system load; the first centrifugal fan and the second centrifugal fan are frequency conversion fans, and the air supply volume and the air pressure of the combined air conditioning unit can be adjusted in real time according to the change of system load and resistance.
In order to respond strongly to the requirements of energy saving and environmental protection, as a preferred embodiment of the present invention, the refrigerant is an environmental protection type refrigerant.
The auxiliary heating source is an electric heating device or a hot water coil or a steam coil. If a stable, reliable and available hot water source or steam source exists on site, the hot water coil or the steam coil is preferentially adopted for reheating, and if the hot water source or the steam coil does not exist, the electric heating device is selected for reheating.
The air inlet is provided with a first electric air valve, the air return inlet is provided with a second electric air valve, the air outlet is provided with a third electric air valve, and the first electric air valve, the second electric air valve and the third electric air valve are respectively connected with a controller. The air supply and return ratio and the air supply quantity of the combined air conditioning unit can be adjusted in real time by adjusting the opening of the electric air valve so as to adapt to the change of air supply requirements.
Compared with the prior art, the invention has the following remarkable advantages:
⑴ the invention has independent cold source, no need of external cold source, complete air conditioning system, flexible installation and arrangement, and strong applicability.
⑵ the invention adopts the direct evaporation refrigeration coil to carry out independent cooling and dehumidification treatment to the fresh air, which not only can obtain a cold source with lower temperature than the freezing water coil, has stronger cooling and dehumidification capability and better dehumidification effect, but also can further increase the cooling and dehumidification range of the fresh air through the adjustment of the frequency conversion compressor and the throttling device, and simultaneously ensures that the second refrigeration coil is a dry coil and the combined air conditioning unit is in a dry working condition running state.
⑶ the invention has two heating coils to replace electric heating, which not only can fully utilize the condensation heat of the air conditioner outdoor unit, reduce the discharge of the condensation heat, benefit the environmental protection, but also effectively avoid the cold and heat offset phenomenon, reduce the electric energy consumption, and at the same time, the heating coil is in the low temperature environment, which can greatly improve the energy efficiency of the self-carrying cold source and realize the energy-saving operation.
⑷ the invention realizes the humidity control of the air supply through the first refrigeration coil (or humidifier), and realizes the temperature control of the air supply through the first heating coil and the second refrigeration coil (or the second heating coil and the auxiliary heating source), therefore, the invention has the independent temperature and humidity control function.
⑸ the invention adopts double fans and can be adjusted by frequency conversion, which greatly improves the adjusting function of the air quantity and the air pressure of the combined air conditioning unit, has stronger adaptability, is provided with a plurality of electric air valves, can flexibly adjust the proportion of fresh air and return air and the air quantity, can realize the operation of all fresh air especially in transition seasons, and simultaneously adopts the frequency conversion compressor, can timely adjust the operation state of the unit according to the change of terminal load, thereby realizing the purpose of energy-saving operation to the utmost extent under the condition of ensuring the indoor health and comfort.
⑹ the invention can realize three working modes of refrigeration and dehumidification, heating and humidification, and full fresh air operation, and can meet the demand of users for fresh air and heat comfort all the year round.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings.
FIG. 1 is a schematic diagram of the composition structure of the present invention.
Detailed Description
As shown in fig. 1, the invention relates to a double-fan combined air conditioning unit with independent cold source, which comprises a controller, an air conditioning unit cabinet body 1 and an air conditioning outdoor unit 2, wherein the controller electrically controls the whole unit, the air conditioning unit cabinet body 1 comprises a cabinet and each component arranged in the cabinet, the cabinet is provided with an air inlet 4, an air supply outlet 18 and a return air inlet 10 communicated with the indoor environment, each component is provided with a primary filter 5, a first refrigeration coil 6, a first heating coil 8, a first filter 9, a first centrifugal fan 11 (a fresh air and return air mixing section of the first centrifugal fan 11 is arranged between the first filter 9 and the second refrigeration coil 12), a second refrigeration coil 12, a second heating coil 13, an auxiliary heating source 14, a humidifier 15, a second centrifugal fan 16 and a second filter 17 in sequence from the air inlet 4 to the air supply outlet 18, the components divide the internal space of the cabinet into a plurality of compartments, wherein, the return air inlet 10 is located between the first filter 9 and the first centrifugal fan 11 (the return air inlet 10 is communicated with the indoor environment and the fresh and return air mixing section inside the air conditioning unit cabinet 1). In this embodiment, the first filter 9 is a medium-efficiency filter, the second filter 17 is a medium-efficiency filter or a sub-high-efficiency filter, and both the first centrifugal fan 11 and the second centrifugal fan 16 are variable frequency fans. The auxiliary heating source 14 may be an electric heating device or a hot water coil or a steam coil, and if there is a stable, reliable, available hot water source or steam source on site, the hot water coil or the steam coil is preferably used for reheating, and if not, the electric heating device is selected for reheating.
A compressor 201 and a condenser 202 are arranged in the air conditioner outdoor unit 2, an outlet of the first refrigeration coil 6 and an outlet of the second refrigeration coil 12 are respectively connected with an inlet of the compressor 201, an outlet of the compressor 201 is respectively connected with an inlet of the condenser 202, an inlet of the first heating coil 8 and an inlet of the second heating coil 13, an outlet of the condenser 202 is connected with an outlet of the first heating coil 8 and an outlet of the second heating coil 13 together and is divided into two pipelines, one of the pipes is connected with the inlet of the first refrigerating coil 6 through a first throttling device 7a, and the other pipe is connected with the inlet of the second refrigerating coil 12 through a second throttling device 7b (so that the condenser 202, the first heating coil 8 and the second heating coil 13 are in a parallel state, and the first refrigerating coil 6 and the second refrigerating coil 12 are in a parallel state), thereby forming a circulation loop in which the refrigerant flows. In this embodiment, the refrigerant is an environmentally friendly refrigerant such as R134 a.
A first solenoid valve 19a is provided on a connection pipe between the outlet of the compressor 201 and the inlet of the first heating coil 8, a second solenoid valve 19b is provided on a connection pipe between the outlet of the compressor 201 and the inlet of the second heating coil 13, a third solenoid valve 19c is provided on a connection pipe between the outlet of the compressor 201 and the inlet of the condenser 202, and the first, second, and third solenoid valves are connected to a controller, respectively.
The air inlet 4 is provided with a first electric air valve 3a, the air return opening 10 is provided with a second electric air valve 3b, the air outlet 17 is provided with a third electric air valve 3c, and the first electric air valve, the second electric air valve and the third electric air valve are respectively connected with the controller.
The working principle of the invention is as follows: outdoor air A entering the fresh air handling unit cabinet body 1 through the air inlet 4 is firstly filtered through the primary filter 5, the filtered air is cooled and dehumidified through the first refrigerating coil 6, wherein the refrigerant flow and the evaporation temperature of the first refrigerating coil 6 can be adjusted through the first throttling device 7a and the compressor 201, so that the cooling and dehumidifying capacity of the first refrigerating coil 6 on fresh air is adjusted, the cooled and dehumidified air is reheated and heated through the first heating coil 8 (the condensation heat of the air conditioning outdoor unit 2 is preferentially utilized, and the heating quantity of the first heating coil 8 can be adjusted through the first electromagnetic valve 19 a), then is filtered through the first filter 9, and then is mixed with indoor air C from the air return opening 10, the mixed air is firstly cooled through the second refrigerating coil 12 under the driving of the first centrifugal fan 11, wherein the refrigerant flow of the second refrigerating coil 12 can be adjusted through the second throttling device 7b and the compressor 201 And the evaporation temperature, thereby adjusting the cooling capacity of the second refrigeration coil 12 to the mixed air, then reheating and heating by the second heating coil 13 and the auxiliary heating source 14 (the heating capacity of the second heating coil 13 can be adjusted by the second electromagnetic valve 19B, when the heating capacity of the second heating coil 13 is insufficient, the auxiliary heating source 14 is started, when the heating capacity of the second heating coil 13 is sufficient, the redundant condensation heat is removed by the condenser 202, then passing through the humidifier 15 (the humidifier 15 is opened in the period of time when the mixed air needs to be humidified in winter or transition season, and is usually not used together with the first refrigeration coil 6), then being driven by the second centrifugal fan 16, being filtered by the second filter 17 to become the mixed air B, and finally blowing the mixed air B from the air supply outlet 18.
The working process of the invention is as follows:
⑴ refrigeration dehumidification mode when refrigeration dehumidification is required, for example during hot summer or wet season (e.g., southern area "return" season or rainy season), the present invention starts the refrigeration dehumidification mode, compressor 201 starts, and humidifier 15 shuts off.
The specific working process of the refrigeration and dehumidification mode of the invention is as follows: outdoor fresh air A enters the cabinet body 1 of the air conditioning unit through the air inlet 4, is firstly filtered through the primary filter 5, and then is cooled and dehumidified through the first refrigerating coil 6, wherein the cooling and dehumidifying capacity of the refrigerating coil 6 can be adjusted through the first throttling device 7a and the compressor 201, the cooled and dehumidified air is reheated and heated through the first heating coil 8, wherein the heating capacity of the first heating coil can be adjusted through the first electromagnetic valve 19a, then is filtered through the first filter 9, and then is mixed with indoor air C from the air return port 10, the mixed air is firstly cooled through the second refrigerating coil 12 under the driving of the first centrifugal fan 11, wherein the refrigerating capacity of the second refrigerating coil 12 can be adjusted through the second throttling device 7b and the compressor 201, and then is reheated and heated through the second heating coil 13, wherein, the amount of heat again of second heating coil 13 can be adjusted through second solenoid valve 19B (when second heating coil 13 heating capacity is not enough, start supplementary heating source 13 at this moment and supply the amount of heat again, when second heating coil 13 heating capacity is sufficient, unnecessary condensation heat is got rid of by condenser 202), later through humidifier 15 (out of work this moment), again under second centrifugal fan 16's drive, become mixed wind B after second filter 17 filters, blow off mixed wind B from supply-air outlet 18 at last, ensure to send into indoor air and satisfy new trend and thermal comfort requirement.
In the cooling and dehumidifying mode, the first throttling device 7a, the second throttling device 7b and the compressor 201 are used for comprehensively regulating the flow rate and the evaporating temperature of the refrigerant flowing through the first cooling coil 6 and the second cooling coil 12; the first solenoid valve 19a, the second solenoid valve 19b, and the third solenoid valve 19c are used to comprehensively regulate the flow of the refrigerant flowing through the first heating coil 8, the second heating coil 13, and the condenser 202; the first electric air valve 3a, the second electric air valve 3b and the third electric air valve 3c are used for adjusting the fresh air ratio and the return air ratio and the air supply quantity of the combined air conditioning unit.
⑵ heating and humidifying mode when heating and humidifying are needed, such as in cold winter, the invention starts the heating and humidifying mode, the compressor 201 is closed, and the auxiliary heating source 14 and the humidifier 15 are opened.
The specific working process of the heating and humidifying mode of the invention is as follows: outdoor fresh air A enters the cabinet body 1 of the air conditioning unit through the air inlet 4, is firstly filtered through the primary filter 5, then passes through the first refrigerating coil 6 (not working at this time) and the first heating coil 8 (not working at this time), then is filtered through the first filter 9, and then is mixed with indoor air C from the air return port 10, the mixed air firstly passes through the second refrigerating coil 12 (not working at this time) and the second heating coil 13 (not working at this time) under the driving of the first centrifugal fan 11, and then is heated and warmed through the auxiliary heating source 14, if a stable, reliable and available hot water source or steam source exists on site, the auxiliary heating source 14 preferentially adopts hot water or steam for heating, if the hot water source or the steam source does not exist, an electric heating device is selected for heating, the heating amount is adjustable, then the air conditioner is humidified through the humidifier 15, and the humidification mode can be selected according, and then, the air is filtered by a second filter 17 under the driving of a centrifugal fan 16 to form mixed air B, and finally, the mixed air B is blown out from an air supply outlet 18, so that the air sent into the room meets the requirements of fresh air and thermal comfort.
In the heating and humidifying mode, the electric regulator valve 20 is used to regulate the amount of humidification; the first electric air valve 3a, the second electric air valve 3b and the third electric air valve 3c are used for adjusting the fresh air ratio and the return air ratio and the air supply quantity of the combined air conditioning unit.
⑶ full fresh air operation, i.e. at other times than the above-mentioned season, there is no need for cooling dehumidification and heating humidification, and therefore the compressor 201, the auxiliary heating source 14 and the humidifier 15 are all turned off, while the second electrically operated damper 3b is turned off.
The specific working process of the full fresh air operation of the invention is as follows: outdoor new trend A gets into the air conditioning unit cabinet body 1 through air intake 4 in, at first filter through primary filter 5, loop through first refrigeration coil 6 again (out of work this moment) and first heating coil 8 (out of work this moment), then filter through first filter 9, then under first centrifugal fan 11's drive, loop through second refrigeration coil 12 again (out of work this moment), second heating coil 13 (out of work this moment), auxiliary heating source 14 (out of work this moment), humidifier 15 (out of work this moment), after under second centrifugal fan 16's drive, obtain clean new trend B after filtering through second filter 17, blow off new trend B from supply-air outlet 18 at last, ensure to send into indoor new trend and satisfy the requirement.
In the full fresh air operation mode, the first centrifugal fan 11 and the second centrifugal fan 16 can be simultaneously started or only one of the centrifugal fans can be operated according to actual requirements; the first electric air valve 3a and the third electric air valve 3c are used for adjusting the fresh air volume.
The embodiments of the present invention are not limited thereto, and according to the above-mentioned contents of the present invention, the present invention can be modified, substituted or changed in other various forms without departing from the basic technical idea of the present invention.

Claims (7)

1. A double-fan combined air conditioning unit with an independent cold source is characterized by comprising a controller, an air conditioning unit cabinet body and an air conditioning outdoor unit, wherein the air conditioning unit cabinet body comprises a cabinet and all components arranged in the cabinet, the cabinet is provided with an air inlet, an air supply outlet and a return air inlet communicated with an indoor environment, each component is sequentially provided with a primary filter, a first refrigeration coil, a first heating coil, a first filter, a first centrifugal fan, a second refrigeration coil, a second heating coil, an auxiliary heating source, a humidifier, a second centrifugal fan and a second filter from the air inlet to the air supply outlet, the components divide the internal space of the cabinet into a plurality of compartments, and the return air inlet is positioned between the first filter and the first centrifugal fan; the air conditioner outdoor unit is internally provided with a compressor and a condenser, an outlet of the first refrigeration coil and an outlet of the second refrigeration coil are respectively connected with an inlet of the compressor, an outlet of the compressor is respectively connected with an inlet of the condenser, an inlet of the first heating coil and an inlet of the second heating coil, an outlet of the condenser is connected with an outlet of the first heating coil and an outlet of the second heating coil and is divided into two pipelines, one pipeline is connected with the inlet of the first refrigeration coil through a first throttling device, and the other pipeline is connected with the inlet of the second refrigeration coil through a second throttling device, so that a circulation loop with a refrigerant flowing inside is formed.
2. The combined air conditioning unit with the independent cold source and the double fans as claimed in claim 1, wherein: the export of compressor with be equipped with first solenoid valve on the connecting pipeline between the import of first heating coil the export of compressor with be equipped with the second solenoid valve on the connecting pipeline between the import of second heating coil the export of compressor with be equipped with the third solenoid valve on the connecting pipeline between the import of condenser, first, second and third solenoid valve are connected with the controller respectively.
3. The combined air conditioning unit with the independent cold source as claimed in claim 2, wherein: the first filter is a medium-efficiency filter, and the second filter is a medium-efficiency filter or a sub-high-efficiency filter.
4. The combined air conditioning unit with the independent cold source and the double fans as claimed in claim 3, wherein: the compressor is a variable frequency compressor, and the first centrifugal fan and the second centrifugal fan are both variable frequency fans.
5. The combined air conditioning unit with the independent cold source and the double fans as claimed in claim 4, wherein: the refrigerant is an environmentally friendly refrigerant.
6. The combined air conditioning unit with the independent cold source and the double fans as claimed in claim 5, wherein: the auxiliary heating source is an electric heating device or a hot water coil or a steam coil.
7. The combined air conditioning unit with the independent cold source as claimed in any one of claims 1 to 6, wherein: the air inlet is provided with a first electric air valve, the air return inlet is provided with a second electric air valve, the air outlet is provided with a third electric air valve, and the first electric air valve, the second electric air valve and the third electric air valve are respectively connected with the controller.
CN202010197804.0A 2020-03-19 2020-03-19 Double-fan combined air conditioning unit with independent cold source Pending CN111442449A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010197804.0A CN111442449A (en) 2020-03-19 2020-03-19 Double-fan combined air conditioning unit with independent cold source

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Application Number Priority Date Filing Date Title
CN202010197804.0A CN111442449A (en) 2020-03-19 2020-03-19 Double-fan combined air conditioning unit with independent cold source

Publications (1)

Publication Number Publication Date
CN111442449A true CN111442449A (en) 2020-07-24

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Application Number Title Priority Date Filing Date
CN202010197804.0A Pending CN111442449A (en) 2020-03-19 2020-03-19 Double-fan combined air conditioning unit with independent cold source

Country Status (1)

Country Link
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113280521A (en) * 2021-04-22 2021-08-20 北京航天发射技术研究所 Movable full fresh air conditioner

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113280521A (en) * 2021-04-22 2021-08-20 北京航天发射技术研究所 Movable full fresh air conditioner

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