CN112984655A - Combined air conditioning unit with built-in secondary return air channel - Google Patents
Combined air conditioning unit with built-in secondary return air channel Download PDFInfo
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- CN112984655A CN112984655A CN202110244413.4A CN202110244413A CN112984655A CN 112984655 A CN112984655 A CN 112984655A CN 202110244413 A CN202110244413 A CN 202110244413A CN 112984655 A CN112984655 A CN 112984655A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
- F24F5/0017—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning using cold storage bodies, e.g. ice
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
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- 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
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- 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
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- 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
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- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
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- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a combined air conditioning unit with a built-in secondary return air channel, wherein a return air flow dividing section of the unit forms a first flow channel and a second flow channel which are independent of each other. The air in the first flow channel is processed by the cooling component and then mixed with the return air provided by the second flow channel, and then other subsequent heat and humidity treatment processes are completed. In the dehumidification working condition in summer, the different proportions of the air flows flowing through the two channels can be adjusted by controlling the opening degrees of the first flow regulating valve, the second flow regulating valve and the third flow regulating valve, and the air is treated to the air supply temperature and humidity state point under the condition of not consuming an external reheating heat source. The heat of the constant temperature and humidity air conditioning system under the dehumidification working condition in summer can be saved. Meanwhile, due to the adoption of a mode of a built-in secondary return air channel, secondary return air is filtered and purified inside the air conditioning unit, and the air quality of air supplied by the air conditioning system is improved.
Description
Technical Field
The invention relates to the technical field of air conditioning, in particular to a combined air conditioning unit with a built-in secondary return air channel, which is suitable for various mixed and closed constant-temperature and constant-humidity central air conditioning systems.
Background
The combined air conditioning unit is a common air treatment terminal device in a central air conditioning system, is formed by assembling various air treatment functional sections, can realize multiple air treatment functions, such as air mixing, flow equalization, filtration, cooling, dehumidification, heating, humidification, air supply, air return, noise elimination and the like, and is commonly used for controlling the environmental temperature and humidity of larger spaces in commercial buildings or industrial buildings.
Air conditioning systems can be divided into: the air treated by the direct-flow system is all outdoor fresh air which is sent to a room for heat and humidity exchange and then is completely discharged outdoors, the system has good sanitary condition, but because the indoor return air is not recycled, the energy consumption of the heat and humidity treatment of the air conditioner is higher, and the system is suitable for workshops or laboratories which remove harmful gases. The air treated by the closed system is totally from indoor recirculated air, and fresh air is not supplemented, so that the energy consumption is low, but the sanitary condition is poor, and the closed system is commonly used for storage storehouses. The air treated by the mixed system is formed by mixing return air and fresh air, the sanitation and energy saving are both between a direct-flow system and a closed system, and the mixed system is also the most common air conditioning system form in the current air conditioning systems.
The design capacity of the air conditioning system equipment operating throughout the year is selected at the maximum load in summer and winter, but the indoor load is often less than the design load in actual operation. The fluctuation of indoor load of an air-conditioning room can be caused along with the entrance and exit of personnel, the opening and closing of illumination, the change of the working state of heating equipment and the change of outdoor meteorological conditions, and the air supply parameters of the air conditioner must be adjusted to adapt to the load change of the room to keep the indoor temperature and humidity within a certain allowable range. Under the working condition of summer, the most common air cooling dehumidification equipment of the air conditioning unit is a surface cooler, and after a low-temperature medium is introduced into the surface cooler, heat in the air can be absorbed and moisture in the air is condensed, so that the cooling and dehumidification of the air are completed. The adjusting process mainly changes the state point after air treatment by adjusting the flow of the chilled water in the surface air cooler, but the temperature and the humidity of the air passing through the surface air cooler belong to a pair of coupling parameters, so when the adjusting is carried out under the working condition in summer, the following problems often occur:
(1) the temperature and humidity control precision is low: when indoor hot wet load changes, only rely on the surface cooler to hardly guarantee simultaneously that two parameters of temperature and humidity maintain in higher precision range, humidity reaches standard, and the temperature has been crossed lowly, and temperature reaches standard, and humidity is too big.
(2) There are significant temperature and humidity gradients: at present, most of air conditioning systems adopt a dew point air supply mode, the air supply temperature difference is often over 10 ℃, and after air supply enters a room, the temperature and the humidity in the horizontal direction and the vertical direction are uneven, so that obvious heat and humidity differences are generated in different areas of the room, and the comfort of indoor personnel or the process production quality are adversely affected.
(3) Cold and hot offset occurs at low load: in order to solve the above two problems, reheating is often used for control in engineering. The air supply humidity requirement is met firstly, and when the temperature is too low, certain heat is supplemented. Although the two problems are solved, the cold and heat are wasted due to the cold and heat offset.
Based on the problems, the secondary air return technology has appeared in engineering, and after one part of return air or mixed air is cooled and dehumidified by a surface air cooler, the requirement of air supply humidity is met, and at the moment, if the temperature is too low, the secondary air return technology is secondarily mixed with the other part of return air to improve the whole temperature of air supply, so that the three problems are avoided. But the secondary return air conditioning system of present practical application all connects through tuber pipe and relevant valve annex outside air conditioning unit, does not have effectual purification measure to the secondary return air, and the pipeline is comparatively complicated, and the design installation is easily influenced by the computer lab space and can't be implemented, and system integration degree and aesthetic property are all not high, and realize that the automatic control effect is not good.
Disclosure of Invention
The invention provides a combined air conditioning unit with a built-in secondary return air channel.
The invention provides the following scheme:
a combined air conditioning unit with a built-in secondary return air channel comprises:
the air supply device comprises a box body, a fan and a fan, wherein an air supply channel is formed inside the box body; the air supply channel at least comprises an air return shunting treatment section and an air blower section which are sequentially arranged along the airflow circulation direction; the return air diversion treatment section is divided by an airflow division plate extending along the airflow circulation direction to form a first flow channel and a second flow channel; the first flow channel and the second flow channel are independent from each other, and the air outlet ends of the first flow channel and the second flow channel are communicated with the air blower section;
the air inlet end of the first flow channel is connected with an air return pipeline through a first flow regulating valve, and a first filtering and purifying assembly and a cooling assembly which are sequentially arranged along the airflow flowing direction are formed inside the first flow channel; the air inlet end of the second flow channel is connected with the air return pipeline through a second flow regulating valve, and a second filtering and purifying assembly is formed inside the second flow channel.
Preferably: further comprising: the temperature sensor and the humidity sensor are both connected with the air feeder section;
the first flow regulating valve, the second flow regulating valve, the temperature sensor and the humidity sensor are all connected with input and output terminals of the controller; the controller is used for controlling the opening and closing degree of the first flow regulating valve and/or the second flow regulating valve according to the temperature value and the humidity value acquired by the temperature sensor and the humidity sensor.
Preferably: the cooling assembly comprises a surface cooler, the surface cooler is connected with an electric cold water regulating valve, and the electric cold water regulating valve is connected with an output terminal of the controller; the controller is also used for controlling the opening and closing degree of the electric cold water regulating valve according to the temperature value and the humidity value acquired by the temperature sensor and the humidity sensor.
Preferably: the air inlet end of the first flow channel is connected with a fresh air pipeline through a third flow regulating valve; the third flow regulating valve is connected with an output terminal of the controller; the controller is further used for controlling the opening and closing degree of the first flow regulating valve and/or the second flow regulating valve and/or the third flow regulating valve according to the temperature value and the humidity value acquired by the temperature sensor and the humidity sensor.
Preferably: the first filtering and purifying assembly and the second filtering and purifying assembly extend along the direction perpendicular to the airflow direction and are respectively and flatly distributed in the first flow channel and the second flow channel.
Preferably: the cooling assemblies extend along the direction perpendicular to the airflow flowing direction and are respectively and flatly distributed in the first flow channel.
Preferably: the airflow partition plate is of a B-shaped structure, and the section width of the cooling assembly in the direction perpendicular to the airflow flowing direction is larger than that of the first filtering and purifying assembly.
Preferably: an access door is formed on the airflow separation plate.
Preferably: the air supply channel also comprises a heating section and a humidifying section which are positioned between the return air shunting treatment section and the air feeder section.
Preferably: the air supply channel also comprises a return air machine section and an air exhaust section which are positioned at the upstream of the return air diversion processing section; the air return section is provided with an air return opening, and the air exhaust section is provided with an air exhaust valve; the first flow regulating valve and the second flow regulating valve are connected with the air exhaust section.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
according to the combined air conditioning unit with the built-in secondary return air channel, the combined air conditioning unit can comprise a box body, and an air supply channel is formed in the box body; the air supply channel at least comprises an air return shunting treatment section and an air blower section which are sequentially arranged along the airflow circulation direction; the return air diversion treatment section is divided by an airflow division plate extending along the airflow circulation direction to form a first flow channel and a second flow channel; the first flow channel and the second flow channel are independent from each other, and the air outlet ends of the first flow channel and the second flow channel are communicated with the air blower section; the air inlet end of the first flow channel is connected with an air return pipeline through a first flow regulating valve, and a first filtering and purifying assembly and a cooling assembly which are sequentially arranged along the airflow flowing direction are formed inside the first flow channel; the air inlet end of the second flow channel is connected with the air return pipeline through a second flow regulating valve, and a second filtering and purifying assembly is formed inside the second flow channel.
Compared with the prior art, the unit that this application embodiment provided possesses following beneficial effect:
1. through the structural advantage of the double channels of the combined air conditioning unit, the independence between the temperature and humidity control loops is improved, the coupling between the two parameters is greatly reduced, and the temperature and humidity precision and the response speed of the controlled environment can be improved.
2. The characteristics of secondary air return technology are utilized to reduce the air supply temperature difference of the air conditioning system under partial load, thereby improving the temperature and humidity uniformity of the controlled environment in the horizontal and vertical directions, and obviously improving the heat and humidity difference of different areas of the controlled environment.
3. By utilizing the heating effect of secondary return air and adjusting the air quantity of the secondary return air to adapt to the change of the heat load of a room, the reheating quantity of the constant-temperature and constant-humidity air conditioning system under the dehumidification working condition in summer can be saved, and the cold and heat offset energy waste phenomenon in the air cooling dehumidification and reheating treatment processes is eliminated.
4. Because the mode of a built-in secondary return air channel is adopted, the secondary return air is filtered and purified in the air conditioning unit, and the air quality of the air supplied by the air conditioning system is favorably improved.
5. The secondary return air channel is arranged in the combined air conditioning unit, so that the complexity of external pipeline connection of the unit can be reduced, the staggered frame hitting among pipelines in the limited space of the air conditioning room can be avoided, and the integral attractiveness of the air conditioning system after installation can be improved. In addition, all automatic control components required by the control system are centrally installed on the air conditioning unit body, so that maintenance and management are facilitated.
Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a combined air conditioning unit with a built-in secondary return air channel according to an embodiment of the present invention;
fig. 2 is another schematic structural diagram of a combined air conditioning unit with a built-in secondary return air channel according to an embodiment of the present invention.
In the figure: the air conditioner comprises a box body 1, a return air diversion processing section 2, a first flow passage 21, a second flow passage 22, a blower section 3, an airflow separation plate 4, an access door 41, a first flow regulating valve 5, a first filtering and purifying component 6, a cooling component 7, an electric cold water regulating valve 71, a second flow regulating valve 8, a second filtering and purifying component 9, a temperature sensor 10, a humidity sensor 11, a controller 12, a third flow regulating valve 13, a heating section 14, a humidifying section 15, a fan returning section 16, a return air inlet 161, an exhaust section 17 and an exhaust valve 171.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.
Examples
Referring to fig. 1 and 2, a combined air conditioning unit with a built-in secondary return air channel according to an embodiment of the present invention, as shown in fig. 1, may include:
the air supply device comprises a box body 1, wherein an air supply channel is formed inside the box body 1; the air supply channel at least comprises an air return shunting treatment section 2 and an air blower section 3 which are sequentially arranged along the airflow flowing direction; the return air diversion treatment section 2 is divided by an airflow division plate 4 extending along the airflow flowing direction to form a first flow passage 21 and a second flow passage 22; the first flow channel 21 and the second flow channel 22 are independent from each other, and the respective air outlet ends are communicated with the blower section 3;
the air inlet end of the first flow channel 21 is connected with an air return pipeline through a first flow regulating valve 5, and a first filtering and purifying assembly 6 and a cooling assembly 7 which are sequentially arranged along the air flow flowing direction are formed inside the first flow channel 21; the air inlet end of the second flow passage 22 is connected with the return air pipeline through a second flow regulating valve 8, and a second filtering and purifying assembly 9 is formed inside the second flow passage 22.
The combined air conditioning unit of built-in secondary return air passageway that this application embodiment provided can solve among the prior art air conditioner room control accuracy and hang down, has the cold and hot when obviously showing temperature, humidity gradient, cold load and reducing to offset and secondary return air cleanliness factor low scheduling problem. And the connecting mode of the ventilating pipeline of the secondary air return system can be simplified, and the occupied space of the air conditioning system is reduced. All automatic control components required by the control system are integrally installed on the air conditioning unit body, so that daily maintenance and management are facilitated. Can be widely applied to central air-conditioning systems in various commercial and industrial fields.
The box that this application embodiment provided can adopt double-deck steel sheet middle heat preservation material preparation such as filling polyurethane foam material or rock wool. All the pipelines are integrated in the box body, so that the connection of the ventilation pipelines can be effectively simplified. The inside of box forms the air feed passageway, and the inside of air feed passageway needs to form return air reposition of redundant personnel processing section and the air feeder section that sets gradually along the air current circulation direction at least, and the return air reposition of redundant personnel section is equipped with the air current division board, forms independent first runner (new return air hybrid channel) and second runner (secondary return air passageway) each other in air conditioning unit inside. The air flows through the first flow passage and the second flow passage which are independent of each other, is mixed after being correspondingly treated, and then enters the subsequent air treatment process. The positions of the flow regulating valves can be selected and arranged on the top surface or the side surface of the air conditioning unit according to actual installation requirements. Set up independent filtration purification subassembly respectively in first runner and second runner, can guarantee that two runners air-out end exhaust return air all by purification treatment, adopt built-in filter's mode can reduce according to the degree of difficulty, need not to set up corresponding pipeline alone. The filter component can be an air filter with various forms and filtering efficiencies such as a plate type, a bag type or a cylinder type according to actual requirements.
In order to realize the automatic control of the unit, the embodiment of the present application may further provide a temperature sensor 10 and a humidity sensor 11, where the temperature sensor 10 and the humidity sensor 11 are both connected to the blower section 3; the temperature sensor and the humidity sensor can be arranged at the air outlet.
A controller 12, to which input/output terminals of the controller 12 are connected, the first flow rate adjustment valve 5, the second flow rate adjustment valve 8, the temperature sensor 10, and the humidity sensor 11; the controller 12 is configured to control the opening and closing degree of the first flow regulating valve 5 and/or the second flow regulating valve 6 according to the temperature value and the humidity value acquired by the temperature sensor 10 and the humidity sensor 11.
Further, the cooling assembly 7 comprises a surface cooler, an electric cold water regulating valve 71 is connected to the surface cooler, and the electric cold water regulating valve 71 is connected with an output terminal of the controller 12; the controller 12 is further configured to control the opening and closing degree of the electric cold water adjusting valve 71 according to the temperature value and the humidity value acquired by the temperature sensor 10 and the humidity sensor 11.
The air inlet end of the first flow channel 21 is connected with a fresh air pipeline through a third flow regulating valve 13; the third flow rate adjustment valve 13 is connected to an output terminal of the controller 12; the controller 12 is further configured to control the opening and closing degree of the first flow regulating valve 5 and/or the second flow regulating valve 8 and/or the third flow regulating valve 13 according to the temperature value and the humidity value acquired by the temperature sensor 10 and the humidity sensor 11.
The controller 12 can receive real-time temperature and humidity parameter values monitored by the temperature and humidity sensor, control the electric cold water regulating valve to regulate the flow of cold water entering the surface air cooler, and control the opening degree of the first flow regulating valve, the second flow regulating valve and the third flow regulating valve, so as to regulate different proportions of air flows flowing through the two channels.
In the actual operation process, when the indoor heat load changes, the controller calculates the required air supply temperature and humidity value according to the difference between the actual indoor temperature and humidity monitoring value and the set value, then the air supply humidity value is adjusted by controlling the opening of the electric cold water adjusting valve, and the air supply temperature value is adjusted by controlling the opening of the second flow adjusting valve. Therefore, the new return air mixing channel can adapt to indoor humidity load change, and the secondary return air channel can adapt to indoor heat load change.
Specifically, when the indoor temperature monitoring value is lower than the set value, the opening degree of the first flow regulating valve is reduced, the air flow of the fresh air and return air mixing channel is reduced, and then the opening degree of the electric cold water regulating valve is regulated, so that the moisture content of air flowing through the surface air cooler meets the requirement of eliminating indoor wet load. And meanwhile, the opening degree of the second flow regulating valve is regulated, so that the air flow of the secondary return air channel is increased and is mixed with the low-temperature low-humidity air of the new return air mixing channel, the temperature of the mixed air is increased, the indoor heat load change is adapted, and the method is similar to the method.
Because the mixed passageway of new return air is the humidity control circuit, the secondary return air passageway be the temperature control circuit, mutual independence each other, independent control respectively to indoor temperature and humidity, control logic is clear more smooth and easy, therefore greatly increased by the temperature of controlled environment, humidity control accuracy and response speed to cold and hot energy waste phenomenon of offsetting that traditional air conditioning system arouses because of the cooling dehumidifies back intensification. Meanwhile, after the air of the fresh return air mixing channel and the air of the secondary return air channel are mixed, the air temperature is higher than the dew point temperature, so that the air supply temperature difference is reduced, the temperature and humidity uniformity of the controlled environment in the horizontal and vertical directions is improved, and the heat and humidity difference of different areas of the controlled environment is obviously improved.
In order to improve the filtering and purifying effect and the cooling and dehumidifying effect, the embodiment of the application may further provide that the first filtering and purifying assembly and the second filtering and purifying assembly extend along a direction perpendicular to an airflow flowing direction and are respectively formed in the first flow channel and the second flow channel in a flat and full manner. The cooling assemblies extend along the direction perpendicular to the airflow flowing direction and are respectively and flatly distributed in the first flow channel.
In order to further increase the windward area of the surface air cooler and improve the cooling and dehumidifying effect, the embodiment of the application may further provide that the airflow separation plate 4 has a zigzag structure, and the cross-sectional width of the cooling assembly is greater than that of the first filtering and purifying assembly in the direction perpendicular to the airflow flowing direction. The air flow partition plate in the surface cooling section can be designed into a Z-shaped inclined partition plate so as to increase the windward area of the surface cooler in the fresh air and return air mixing channel.
In order to facilitate the maintenance of the various parts inside the cabinet, the airflow separation plate 4 is formed with an access door 41. The personnel of being convenient for pass in and out through this access door and maintain the maintenance.
In order to further improve the application range of the unit provided by the embodiment of the present application, the embodiment of the present application may further provide that the air supply channel further includes a heating section 14 and a humidifying section 15 between the return air split-flow processing section 2 and the blower section 3. The heating section 14 and the humidification section 15 allow the unit to be used to provide heated and humidified air to the chamber. The heating section can adopt multiple heating methods such as steam humidification coil, hot water heating coil or electric heating coil, the humidification section can adopt multiple humidification methods such as dry steam humidifier, spray humidifier, little fog humidifier or electric humidifier, the air supply machine section can adopt air supply methods such as centrifugal fan or fan wall.
In order to make the unit that this application provided be applicable to the too big occasion of return air resistance among the big amount of wind air conditioning system to and there is the demand of airing exhaust or need increase the occasion that the new trend was operated in the transition season indoor. As shown in fig. 2, the embodiment of the present application may further provide that the air supply channel further includes a return air fan section 16 and an exhaust section 17 located upstream of the return air diversion processing section 2; the air return section 16 is provided with an air return opening 161, and the exhaust section 17 is provided with an exhaust valve 171; the first flow regulating valve 5 and the second flow regulating valve 8 are both connected with the exhaust section 17. On the basis of all the parts contained in the box body, an air exhaust section, an air exhaust valve, a fan return section and an air return opening are additionally arranged. The air-conditioning system is mainly used for occasions with overlarge return air resistance in a large-air-volume air-conditioning system and occasions with indoor air exhaust requirements or occasions needing to increase fresh air operation in transitional seasons. The principle and the specific implementation mode of the technology of the built-in secondary return air channel are the same as the above-mentioned facts, and are not described in detail here.
In a word, the combined air conditioning unit with the built-in secondary return air channel comprises a return air shunting section, a filtering and purifying section, a surface cooling section, other necessary heat and humidity treatment sections and a blower section, wherein an airflow separation plate is arranged along the airflow direction from the return air shunting section, and the inner space of the return air shunting section is divided into two parts to form a first flow channel and a second flow channel which are independent mutually. The air in the first flow passage is mixed with the air in the second flow passage after being treated in the surface cooling section, and then other subsequent heat and humidity treatment processes are completed, and finally the mixture is sent to a controlled room or area. In the dehumidification working condition in summer, the air flow through the two channels can be adjusted according to different proportions by controlling the opening degrees of the first flow adjusting valve, the second flow adjusting valve and the third flow adjusting valve, and the air is treated to the air supply temperature and humidity state point under the condition of not consuming an external reheating heat source. In addition, the combined air conditioning unit can save the reheat of the constant temperature and humidity air conditioning system under the dehumidification working condition in summer, and eliminate the waste phenomenon of cold and hot offset energy in the air cooling dehumidification and reheating treatment processes. Meanwhile, due to the adoption of a mode of a built-in secondary return air channel, secondary return air is filtered and purified inside the air conditioning unit, and the air quality of air supplied by the air conditioning system is improved.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (10)
1. The utility model provides a built-in secondary return air channel's combined air conditioning unit which characterized in that includes:
the air supply device comprises a box body, a fan and a fan, wherein an air supply channel is formed inside the box body; the air supply channel at least comprises an air return shunting treatment section and an air blower section which are sequentially arranged along the airflow circulation direction; the return air diversion treatment section is divided by an airflow division plate extending along the airflow circulation direction to form a first flow channel and a second flow channel; the first flow channel and the second flow channel are independent from each other, and the air outlet ends of the first flow channel and the second flow channel are communicated with the air blower section;
the air inlet end of the first flow channel is connected with an air return pipeline through a first flow regulating valve, and a first filtering and purifying assembly and a cooling assembly which are sequentially arranged along the airflow flowing direction are formed inside the first flow channel; the air inlet end of the second flow channel is connected with the air return pipeline through a second flow regulating valve, and a second filtering and purifying assembly is formed inside the second flow channel.
2. The combined air conditioning unit with an internal secondary return air duct according to claim 1, further comprising:
the temperature sensor and the humidity sensor are both connected with the air feeder section;
the first flow regulating valve, the second flow regulating valve, the temperature sensor and the humidity sensor are all connected with input and output terminals of the controller; the controller is used for controlling the opening and closing degree of the first flow regulating valve and/or the second flow regulating valve according to the temperature value and the humidity value acquired by the temperature sensor and the humidity sensor.
3. The combined air conditioning unit with a built-in secondary return air channel as claimed in claim 2, wherein the cooling assembly comprises a surface cooler, an electric cold water regulating valve is connected with the surface cooler, and the electric cold water regulating valve is connected with an output terminal of the controller; the controller is also used for controlling the opening and closing degree of the electric cold water regulating valve according to the temperature value and the humidity value acquired by the temperature sensor and the humidity sensor.
4. The combined air conditioning unit with the built-in secondary return air channel as claimed in claim 2, wherein the air inlet end of the first flow channel is connected with a fresh air pipeline through a third flow regulating valve; the third flow regulating valve is connected with an output terminal of the controller; the controller is further used for controlling the opening and closing degree of the first flow regulating valve and/or the second flow regulating valve and/or the third flow regulating valve according to the temperature value and the humidity value acquired by the temperature sensor and the humidity sensor.
5. The combined air conditioning unit with a built-in secondary return air channel as claimed in claim 1, wherein the first filtering and purifying assembly and the second filtering and purifying assembly extend along a direction perpendicular to the flowing direction of the air current and are respectively and fully distributed in the first flow channel and the second flow channel.
6. The combined air conditioning unit with a built-in secondary return air channel as claimed in claim 5, wherein the cooling units extend in a direction perpendicular to the air flow direction and are respectively formed in the first flow channel in a flat manner.
7. The combined air conditioning unit with a built-in secondary return air duct according to claim 6, wherein the airflow dividing plate has a zigzag structure, and the sectional width of the cooling unit in the direction perpendicular to the airflow flowing direction is larger than the sectional width of the first filtering and purifying unit.
8. The combined air conditioning unit with built-in secondary return air duct according to claim 1, characterized in that an access door is formed on the airflow dividing plate.
9. The combined air conditioning unit with built-in secondary return air duct of claim 1, wherein the air supply duct further comprises a heating section and a humidifying section between the return air diversion treatment section and the blower section.
10. The combined air conditioning unit with a built-in secondary return air channel as claimed in claim 1, wherein the air supply channel further comprises a return air fan section and an exhaust section upstream of the return air diversion treatment section; the air return section is provided with an air return opening, and the air exhaust section is provided with an air exhaust valve; the first flow regulating valve and the second flow regulating valve are connected with the air exhaust section.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110244413.4A CN112984655A (en) | 2021-03-05 | 2021-03-05 | Combined air conditioning unit with built-in secondary return air channel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110244413.4A CN112984655A (en) | 2021-03-05 | 2021-03-05 | Combined air conditioning unit with built-in secondary return air channel |
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| CN112984655A true CN112984655A (en) | 2021-06-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110244413.4A Pending CN112984655A (en) | 2021-03-05 | 2021-03-05 | Combined air conditioning unit with built-in secondary return air channel |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113865159A (en) * | 2021-09-28 | 2021-12-31 | 同济大学 | Anhydrous humidifying device suitable for low-temperature environment and control method |
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2021
- 2021-03-05 CN CN202110244413.4A patent/CN112984655A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113865159A (en) * | 2021-09-28 | 2021-12-31 | 同济大学 | Anhydrous humidifying device suitable for low-temperature environment and control method |
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