A dual-cold-source high-efficiency filtration and heat recovery integrated fresh air handling unit

Abstract

The application discloses a double-cold-source high-efficiency filtering and heat-recovering integrated fresh air handling unit, and belongs to the technical field of air conditioners. The double-cold-source high-efficiency filtering and heat-recovering integrated fresh air handling unit comprises a main warehouse body, an upper treatment warehouse mechanism is arranged at the inner top of the main warehouse body, a lower treatment warehouse mechanism is arranged at the inner bottom of the main warehouse body, and a composite fin type heat exchanger is installed at the middle position in the main warehouse body. The water circulating mechanism realizes intelligent switching of two circulating modes. In the internal circulating mode, water in the liquid storage warehouse is circulated between the two sets of surface coolers, and the composite fin type heat exchanger is used for fully absorbing heat energy in return air in winter or cold energy in summer, so that the heat recovery efficiency is improved, and the energy consumption demand of fresh air pretreatment is reduced. In the external circulating mode, the external water supply device directly delivers cold and hot water to the surface coolers in the first exhaust warehouse, and the fresh air heating / cooling effect is focused on and strengthened, and the double-cold-source high-efficiency filtering and heat-recovering integrated fresh air handling unit is suitable for extreme temperature difference or high load working conditions.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of air conditioners, and particularly relates to a double-cold-source high-efficiency filtering and heat recovery integrated fresh air unit. BACKGROUND

[0002] As a core equipment for improving indoor air quality and ensuring health and comfort, the fresh air system is increasingly widely applied in the fields of medical treatment, data centers, high-end commercial buildings and precision manufacturing, and the double-cold-source air conditioning unit is more and more favored by people due to its energy saving, comfort and high precision of temperature and humidity control, and its basic operation principle is that the sensible heat load and latent heat load in the air are separately processed by the high-temperature cold source system and the low-temperature cold source system, so as to realize independent control of the temperature and humidity of the indoor environment.

[0003] The water circulation system of the traditional fresh air unit adopts a single circulation mode, which cannot be flexibly adjusted according to seasons and load changes. For example, when the waste heat of return air needs to be recovered to preheat fresh air in winter, the single external circulation easily leads to heat loss, and when the fresh air refrigeration needs to be strengthened in summer, the single internal circulation is difficult to efficiently utilize the external cold source, resulting in "cold and heat offset" or energy consumption redundancy. Moreover, the air conditioner heat exchangers of the traditional fresh air unit are arranged in a scattered manner, the external heat exchangers are mostly exposed to the outdoor environment, and the internal heat exchangers only process fresh air, without forming effective linkage with the return air system. The waste heat (in winter) or waste cold (in summer) in the return air is not fully recovered and is directly discharged to the outdoor environment, causing energy waste, especially under high load conditions, the air conditioner compressor has large operation load and low energy efficiency ratio. Meanwhile, the filtering system of the traditional fresh air unit is mostly two-stage filtering of "primary efficiency + medium efficiency", and large particles of dust in the fresh air directly enter the primary efficiency filter, resulting in fast clogging of the filter and short cleaning cycle. The filter needs to be stopped and disassembled for cleaning, affecting the operation stability of the hospital ICU, data center and other scenes with strict requirements for continuous fresh air supply. Meanwhile, lacking of preliminary screening and pretreatment links, the primary efficiency and medium efficiency filters are in a high load state for a long time, the filtering efficiency decays fast, and it is difficult to maintain stable cleanliness output. SUMMARY

[0004] The technical problem to be solved by the application is to overcome the shortcomings of the prior art and provide a double-cold-source high-efficiency filtering and heat recovery integrated fresh air unit.

[0005] The technical scheme adopted to solve the above technical problem is a double-cold-source high-efficiency filtering and heat recovery integrated fresh air unit, which comprises a main warehouse body, an upper treatment warehouse mechanism is arranged at the inner top of the main warehouse body, a lower treatment warehouse mechanism is arranged at the inner bottom of the main warehouse body, a composite fin type heat exchanger is installed at the middle position in the main warehouse body, a filtering mechanism for dust removal is arranged at one end of the main warehouse body, a water circulation mechanism is arranged at the end of the main warehouse body away from the filtering mechanism, and an air conditioner mechanism for refrigeration is arranged at the end of the main warehouse body close to the water circulation mechanism.

[0006] Further, the upper processing bin mechanism comprises a first air inlet bin and a second air inlet bin, one ends of the first air inlet bin and the second air inlet bin away from each other are respectively provided with a first air inlet and a second air inlet, one end of the inside of the second air inlet bin close to the second air inlet is installed with a primary efficiency filter, one end of the inside of the second air inlet bin away from the second air inlet is installed with a medium efficiency filter, and the inside of the first air inlet bin is not communicated with the inside of the second air inlet bin.

[0007] Through the above technical solution, the physical isolation and hierarchical processing of return air and fresh air can be realized: the return air is independently introduced through the first air inlet bin, and the fresh air is sequentially purified by the primary efficiency filter and the medium efficiency filter in the second air inlet bin, so as to avoid cross contamination of the return air and the fresh air, improve the cleanliness of the supply air, meet the filtering requirements of medical, clean workshop and other scenes, and reduce energy crosstalk through the independent bin body design, thereby laying a foundation for subsequent heat recovery.

[0008] Further, the lower processing bin mechanism comprises a first exhaust bin located directly below the first air inlet bin and a second exhaust bin located directly below the second air inlet bin, the inside of the first exhaust bin is not communicated with the inside of the second exhaust bin, the inside of the second exhaust bin is communicated with the inside of the first air inlet bin through a composite fin heat exchanger, the inside of the first exhaust bin is communicated with the inside of the second air inlet bin through the composite fin heat exchanger, one ends of the first exhaust bin and the second exhaust bin away from each other are respectively provided with a second air outlet and a first air outlet, and the first exhaust bin and the second exhaust bin are respectively installed with a supply fan and an exhaust fan at one ends away from each other.

[0009] Through the above technical solution, a cross heat exchange path of return air and fresh air is constructed: the return air enters the composite fin heat exchanger through the first air inlet bin to release energy, the fresh air enters the composite fin heat exchanger through the second air inlet bin to absorb energy, and then is sent into the room by the supply fan through the first exhaust bin; the return air is discharged by the exhaust fan through the second exhaust bin after releasing energy, and high-efficiency heat recovery is realized through the composite fin heat exchanger, thereby reducing the pre-treatment energy consumption of fresh air, and the supply fan and the exhaust fan are independently controlled to maintain the stability of the indoor positive pressure.

[0010] Further, the filtering mechanism comprises a first filter bin installed outside the second air inlet and a second filter bin installed outside the first air outlet, one ends of the inside of the first filter bin and the second filter bin away from the main bin body are both installed with a primary screen filter screen and a louver fan, and the two sides of the first filter bin and the second filter bin are jointly provided with a switching assembly.

[0011] By the above technical scheme, the three-stage preprocessing and filtering maintenance optimization of fresh air is realized: before the fresh air enters the second air inlet, the large particle dust is first intercepted by the preliminary screening filter screen of the second filter bin, and the louver fan adjusts the air inlet angle; the first filter bin serves as a standby filtering and ash removal channel, and function switching is realized through the switching assembly, which helps to reduce the load of the primary and medium efficiency filters, prolong the cleaning cycle of the primary and medium efficiency filters, and improve the overall filtering efficiency by positioning the preliminary screening filter screen.

[0012] Further, the switching assembly includes two groups of arc-shaped guide bins, the first filter bin is symmetrically provided with a first interface on both sides, the second filter bin is symmetrically provided with a second interface on both sides, the first interface and the second interface on the same side are communicated through an adjacent group of arc-shaped guide bins, the inner sides of the first filter bin and the second filter bin are symmetrically hinged with guide plates, one end of the inner side of the first interface and the second interface is hinged with an electric push rod, the output end of the electric push rod is hinged with the middle position of an adjacent group of guide plates, and the two groups of guide plates in the first interface are centrally symmetrically arranged, and the two groups of guide plates in the second interface are also centrally symmetrically arranged, and the shafts of the two groups of guide plates at the same height are drivingly connected through a synchronous assembly.

[0013] Through the above technical scheme, the automatic switching of the fresh air inlet and the ash removal function is realized: the electric push rod drives the guide plate to rotate around its hinged shaft until the two groups of guide plates are attached to each other, under normal conditions, the fresh air enters the first filter bin, during ash removal, the guide plate switching makes the fresh air enter the second filter bin, and the return air enters the first filter bin through the arc-shaped guide bin and blows the preliminary screening filter screen to remove ash, without stopping the machine during the process, ensuring continuous operation, and the symmetric guide plate design ensures the sealing switching of the airflow path, avoiding leakage.

[0014] Further, the synchronous assembly includes a synchronous wheel and a synchronous belt, the shafts of the two groups of guide plates at the same height extend to the outside of the bin body and are provided with synchronous wheels, and the outer sides of the two groups of synchronous pulleys are jointly provided with a synchronous belt.

[0015] Through the above technical scheme, the synchronous and same-direction rotation of the two groups of guide plates is realized through the synchronous belt transmission, when the electric push rod drives one group of guide plates to act, the synchronous assembly drives the other group of symmetric guide plates to rotate synchronously, ensuring the symmetric switching of the airflow path in the first filter bin and the second filter bin.

[0016] Further, the inner top and inner bottom of the first filter bin and the second filter bin are symmetrically provided with two groups of arc-shaped sliding grooves, and the top and bottom of the guide plate are provided with arc-shaped sliding blocks matched with the arc-shaped sliding grooves.

[0017] Through the technical scheme, when the guide plate rotates around the hinge shaft as the axis, the arc-shaped sliding block slides in the arc-shaped sliding groove, and the cooperation between the arc-shaped sliding block and the arc-shaped sliding groove ensures the stable rotation of the guide plate along the arc-shaped sliding groove.

[0018] Further, the water circulation mechanism comprises a first surface cooler and a second surface cooler, the first surface cooler is located in the interior of the first air inlet warehouse, the second surface cooler is located in the interior of the first air outlet warehouse, the input end of the first surface cooler is communicated with the output end of the second surface cooler through a water outlet three-way valve, one side of the interior of the first air outlet warehouse is provided with a liquid storage warehouse, the output end of the first surface cooler is communicated with the inner top of the liquid storage warehouse, the side of the first air outlet warehouse close to the liquid storage warehouse is provided with a water pump, and the output end of the water pump is communicated with the input end of the second surface cooler through a water inlet three-way valve, the third joint of the water inlet three-way valve is communicated with the inner top of the liquid storage warehouse, and the input end of the water pump is communicated with the inner bottom of the liquid storage warehouse.

[0019] Through the technical scheme, the heat energy is recycled efficiently in the internal circulation mode: the water in the liquid storage warehouse is circulated between the first surface cooler and the second surface cooler through the linkage of the water inlet three-way valve and the water outlet three-way valve, the heat energy of the return air is absorbed by the two surface coolers and is transmitted to the fresh air, the heat recovery efficiency is significantly improved in the internal circulation mode, and then the energy consumption required for heating / cooling the fresh air is reduced.

[0020] Further, the third joint of the water outlet three-way valve is provided with a water return joint, and one side of the main warehouse body is provided with a water supply joint communicated with the inner bottom of the liquid storage warehouse.

[0021] Through the technical scheme, the external circulation mode is strengthened: the water inlet three-way valve and the water outlet three-way valve are switched to external circulation, the external cold / hot water enters the liquid storage warehouse through the water supply joint, and only flows in the second surface cooler, and the used water is discharged through the water return joint, the external circulation mode can strengthen the fresh air processing capacity under extreme temperature difference, adapt to high load working conditions, and improve the system flexibility.

[0022] Further, the air conditioning mechanism comprises a compressor located at one side of the inner top of the first air outlet warehouse, the interior of the first air inlet warehouse is provided with an outer heat exchanger, the interior of the first air outlet warehouse is provided with an inner heat exchanger, and the inner heat exchanger is located directly below the outer heat exchanger, the output end and the input end of the compressor are communicated with the access end of the outer heat exchanger and the exit end of the inner heat exchanger through a four-way valve, and the exit end of the outer heat exchanger is communicated with the access end of the inner heat exchanger through an expansion valve.

[0023] Through the technical scheme, the "return air-fresh air" air conditioning energy closed loop is constructed: the outer heat exchanger absorbs the return air waste heat in winter or releases the cold quantity in summer, and the energy is transmitted to the fresh air by the inner heat exchanger after circulation, the return air waste energy is recycled, the air conditioner compressor load is reduced, and the temperature is controlled in cooperation with the water circulation to ensure the fluctuation of the temperature and humidity of the supply air.

[0024] The beneficial effects of the present application are as follows: (1) The present application realizes intelligent switching of two circulation modes through the water circulation mechanism. In the internal circulation mode, the water in the liquid storage bin circulates between the two sets of surface coolers, cooperates with the composite finned heat exchanger to fully absorb the heat energy in the return air in winter or the cold energy in summer, thereby improving the heat recovery efficiency and reducing the energy consumption demand of new air pretreatment. In the external circulation mode, the external water supply device directly delivers cold and hot water to the surface coolers in the first exhaust bin, focuses on strengthening the heating / cooling effect of new air, and is suitable for extreme temperature difference or high load working conditions. The two modes are switched as needed, and the energy consumption is significantly reduced compared to the traditional single circulation system, which adapts to the actual needs of different seasons and different loads; (2) The present application integrates the external heat exchanger of the air conditioning mechanism in the first air inlet bin and the internal heat exchanger in the first exhaust bin. Through the cooperative operation of the compressor, four-way valve, heat exchanger and expansion valve, a "return air-new air" energy closed loop is constructed, that is, the waste heat in the return air is recovered to preheat the new air in winter, and the waste cold in the return air is recovered to precool the new air in summer, reducing the dependence of the air conditioning system on external energy and further reducing the energy consumption in the heating / cooling process; (3) The present application adopts "primary screening filter screen+primary efficiency filter+intermediate efficiency filter" three-stage filtration through the filtering mechanism, that is, the primary screening filter screen intercepts large particles of dust in advance, reducing the load of the primary and intermediate efficiency filters and prolonging their cleaning cycle. The switching assembly drives the guide plates with the hinge shaft as the axis to rotate until the two guide plates are attached to each other, realizing the pipeline switching of the new air inlet and the return air outlet, that is, the original new air inlet discharges dust through the return air outlet, and the original return air inlet is switched to the new air inlet and the standby primary screening filter screen is activated. Without stopping, the dust can be cleaned, avoiding system interruption due to maintenance, especially suitable for medical, data center and other scenes with strict requirements for continuous operation. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is the first perspective structural view of the present application;

[0026] Figure 2 is the second perspective structural view of the present application;

[0027] Figure 3 is the first perspective structural view of the longitudinal section of the present application;

[0028] Figure 4 is the second perspective structural view of the longitudinal section of the present application;

[0029] Figure 5 is the disassembled schematic view of the filtering mechanism of the present application;

[0030] Figure 6 is the overhead sectional view of the first filtering bin of the present application;

[0031] Figure 7 is the overhead sectional view of the second filtering bin of the present application;

[0032] Figure 8 is a perspective view of the filter mechanism after the electric push rod is elongated;

[0033] Figure 9 is a first perspective view of the water circulation mechanism;

[0034] Figure 10 is a second perspective view of the water circulation mechanism;

[0035] Figure 11 is a structural view of the air conditioning mechanism.

[0036] Reference signs: 1, main bin body; 2, upper processing bin mechanism; 201, first air inlet bin; 202, second air inlet bin; 203, first air inlet; 204, second air inlet; 205, primary filter; 206, medium filter; 3, lower processing bin mechanism; 301, first air outlet bin; 302, second air outlet bin; 303, first air outlet; 304, second air outlet; 305, air supply fan; 306, air exhaust fan; 4, composite fin heat exchanger; 5, filter mechanism; 501, first filter bin; 502, second filter bin; 503, primary screening filter screen; 504, louver fan; 505, switching assembly; 5051, first interface; 5052, second interface; 5053, arc-shaped guide bin; 5054, guide plate; 5055, electric push rod; 506, synchronization assembly; 6, water circulation mechanism; 601, first surface condenser; 602, second surface condenser; 603, water outlet tee joint valve; 604, liquid storage bin; 605, water pump; 606, water inlet tee joint valve; 607, water supply joint; 608, water return joint; 7, air conditioning mechanism; 701, outer heat exchanger; 702, inner heat exchanger; 703, compressor; 704, expansion valve; 705, four-way valve. DETAILED DESCRIPTION

[0037] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and should not be used to limit the present application.

[0038] As Figures 1-4The double-cold-source high-efficiency filtering and heat-recovery integrated fresh air handling unit of the embodiment includes a main warehouse body 1, an upper treatment warehouse mechanism 2 is arranged at the inner top of the main warehouse body 1, a lower treatment warehouse mechanism 3 is arranged at the inner bottom of the main warehouse body 1, and a composite fin heat exchanger 4 is installed at the middle position inside the main warehouse body 1. The upper treatment warehouse mechanism 2 includes a first air inlet warehouse 201 and a second air inlet warehouse 202, and the first air inlet warehouse 201 and the second air inlet warehouse 202 are respectively provided with a first air inlet 203 and a second air inlet 204 at the ends away from each other. An initial filter 205 is installed at the end of the second air inlet warehouse 202 close to the second air inlet 204, and a medium filter 206 is installed at the end of the second air inlet warehouse 202 away from the second air inlet 204. The interiors of the first air inlet warehouse 201 and the second air inlet warehouse 202 are not connected. The lower treatment warehouse mechanism 3 includes a first air outlet warehouse 301 located directly below the first air inlet warehouse 201 and a second air outlet warehouse 302 located directly below the second air inlet warehouse 202, and the interiors of the first air outlet warehouse 301 and the second air outlet warehouse 302 are not connected. The interior of the second air outlet warehouse 302 is connected with the interior of the first air inlet warehouse 201 through the composite fin heat exchanger 4, and the interior of the first air outlet warehouse 301 is connected with the interior of the second air inlet warehouse 202 through the composite fin heat exchanger 4. The first air outlet warehouse 301 and the second air outlet warehouse 302 are respectively provided with a second air outlet 304 and a first air outlet 303 at the ends away from each other, and are respectively installed with a supply fan 305 and an exhaust fan 306 at the ends away from each other. A closed treatment space is constructed through the main warehouse body 1, the upper treatment warehouse mechanism 2 is divided into the first air inlet warehouse 201 and the second air inlet warehouse 202 which are independent of each other and are respectively used for the preliminary introduction of return air and fresh air. The lower treatment warehouse mechanism 3 is correspondingly provided with the first air outlet warehouse 301 and the second air outlet warehouse 302 which are respectively used for the supply of fresh air and the exhaust of return air. The composite fin heat exchanger 4 is used as a core heat exchange component to realize the cross heat transfer of the first air inlet warehouse 201 and the second air outlet warehouse 302 and the second air inlet warehouse 202 and the first air outlet warehouse 301. The supply fan 305 drives the fresh air to be sent into the room after heat exchange, the exhaust fan 306 drives the return air to be exhausted after heat exchange, and the fresh air channel of the second air inlet warehouse + the first air outlet warehouse and the return air channel of the first air inlet warehouse + the second air outlet warehouse are completely isolated to avoid cross contamination. Meanwhile, the initial filter 205 and the medium filter 206 in the second air inlet warehouse 202 perform two-stage purification on the fresh air to ensure the cleanliness of the supply air.

[0039] As Figures 3-8As shown, one end of the main bin body 1 of the embodiment is provided with a filtering mechanism 5 for dust removal, the filtering mechanism 5 comprises a first filtering bin 501 installed outside the second air inlet 204 and a second filtering bin 502 installed outside the first air outlet 303, the inside of the first filtering bin 501 and the second filtering bin 502 away from the one end of the main bin body 1 is respectively provided with a preliminary screening filter screen 503 and a louver fan 504, the two sides of the first filtering bin 501 and the second filtering bin 502 are jointly provided with a switching assembly 505, the switching assembly 505 comprises an arc-shaped guide bin 5053, the arc-shaped guide bin 5053 is provided with two groups, the two sides of the first filtering bin 501 are symmetrically provided with a first interface 5051, the two sides of the second filtering bin 502 are symmetrically provided with a second interface 5052, the same side first interface 5051 and the second interface 5052 are communicated through an adjacent group of arc-shaped guide bins 5053, the inner two sides of the first filtering bin 501 and the second filtering bin 502 are respectively and centrally hinged with a guide plate 5054, one end of the inner side of the first interface 5051 and the second interface 5052 is respectively hinged with an electric push rod 5055, the output end of the electric push rod 5055 is hinged with the middle position of an adjacent group of guide plates 5054, and the two groups of guide plates 5054 in the two groups of first interfaces 5051 are centrally symmetrically arranged, the two groups of guide plates 5054 in the two groups of second interfaces 5052 are also centrally symmetrically arranged, the shafts of the two groups of guide plates 5054 at the same height are drivingly connected through a synchronous assembly 506, the inner top and the inner bottom of the first filtering bin 501 and the second filtering bin 502 are symmetrically provided with two groups of arc-shaped sliding grooves, the top and the bottom of the guide plate 5054 are respectively provided with an arc-shaped sliding block matched with the arc-shaped sliding groove, the first filtering bin 501 and the second filtering bin 502 realize the preprocessing of fresh air, the preliminary screening filter screen 503 in the two bins first intercepts large-particle dust in the fresh air, reduces the load of the subsequent primary filter and medium-efficiency filter, the switching assembly 505 drives the guide plate 5054 to overturn through the electric push rod 5055: in normal state, the fresh air is filtered through the preliminary screening filter screen of the second filtering bin 502, and then enters the system through the second air inlet 204; when it is needed to clean the dust, the electric push rod is elongated / shortened, drives the guide plate to rotate, and makes the first interface 5051 and the second interface 5052 communicate through the arc-shaped guide bin 5053, at this time, the fresh air is switched to enter through the first filtering bin 501, the return air is discharged through the second filtering bin 502, and blows the dust cleaning of the preliminary screening filter screen inside, the arc-shaped sliding block and the arc-shaped sliding groove cooperate to ensure that the guide plate stably rotates along the arc-shaped sliding groove, and the synchronous assembly 506 ensures that the guide plates at the same height move consistently.

[0040] As Figures 3-4As shown, the synchronization assembly 506 of the embodiment includes a synchronization wheel and a synchronization belt, the rotating shafts of the two sets of guide plates 5054 at the same height extend to the outside of the bin body and are installed with the synchronization wheel, and the outer sides of the two sets of synchronization pulleys are jointly provided with the synchronization belt, the rotating shafts of the two sets of guide plates 5054 at the same height extend to the outside of the bin body and are installed with the synchronization wheel, and the synchronization belt is driven to realize the synchronous and same-direction rotation of the two sets of guide plates, when the electric push rod 5055 drives one set of guide plates to act, the synchronization assembly drives the other set of symmetric guide plates to rotate synchronously, and the airflow path in the first filter bin 501 and the second filter bin 502 is ensured to be symmetrically switched.

[0041] As shown in Figures 3-4 and Figures 9-10 As shown, the water circulation mechanism 6 is arranged at the end of the main bin body 1 away from the filtering mechanism 5, the water circulation mechanism 6 includes a first surface cooler 601 and a second surface cooler 602, the first surface cooler 601 is located in the inside of the first air inlet bin 201, the second surface cooler 602 is located in the inside of the first air outlet bin 301, the input end of the first surface cooler 601 and the output end of the second surface cooler 602 are communicated through a water outlet three-way valve 603, one side in the inside of the first air outlet bin 301 is installed with a liquid storage bin 604, the output end of the first surface cooler 601 is communicated with the inner top of the liquid storage bin 604, one side of the first air outlet bin 301 close to the liquid storage bin 604 is installed with a water pump 605, and the output end of the water pump 605 is communicated with the input end of the second surface cooler 602 through a water inlet three-way valve 606, the third joint of the water inlet three-way valve 606 is communicated with the inner top of the liquid storage bin 604, the input end of the water pump 605 is communicated with the inner bottom of the liquid storage bin 604, and the third joint of the water outlet three-way valve 603 is installed with a water return joint 608, one side of the main bin body 1 is installed with a water supply joint 607 communicated with the inner bottom of the liquid storage bin 604, and the switching between the internal circulation and the external circulation is realized through the water inlet three-way valve 606 and the water outlet three-way valve 603:

[0042] The internal circulation mode: the water inlet three-way valve communicates the water pump 605 and the second surface cooler 602, and the water outlet three-way valve communicates the second surface cooler and the first surface cooler 601, and the water in the liquid storage bin 604 circulates between the first surface cooler, the liquid storage bin, the water pump, the second surface cooler and the first surface cooler (as shown by the solid arrow direction in the description) Figure 10 , and the heat energy of the return air is recovered through the two surface coolers and the composite finned heat exchanger;

[0043] The external circulation mode: the water inlet three-way valve 606 is cut off from the communication with the second surface cooler 602, the water outlet three-way valve 603 communicates the second surface cooler 602 and the water return joint 608, the external water supply enters the liquid storage bin through the water supply joint 607, and only flows in the second surface cooler 602, so as to strengthen the cooling / heating effect of the fresh air, and the flow direction is water supply joint→liquid storage bin→water inlet three-way valve→second surface cooler→water outlet three-way valve→water return joint (as shown by the dotted arrow direction in the description) Figure 9The hollow arrow direction is shown).

[0044] As shown in Figures 1-4 and Figure 11 The air conditioning mechanism 7 is arranged at one end of the main bin body 1 close to the water circulation mechanism 6 for refrigeration, the air conditioning mechanism 7 includes a compressor 703 arranged at one side of the top of the first exhaust bin 301, an outer heat exchanger 701 arranged in the first air inlet bin 201, an inner heat exchanger 702 arranged in the first exhaust bin 301, and the inner heat exchanger 702 is arranged directly below the outer heat exchanger 701, the output end and the input end of the compressor 703 are communicated with the access end of the outer heat exchanger 701 and the exit end of the inner heat exchanger 702 through a four-way valve 705, the exit end of the outer heat exchanger 701 is communicated with the access end of the inner heat exchanger 702 through an expansion valve 704, the outer heat exchanger 701 of the air conditioning mechanism 7 is integrated in the first air inlet bin 201, the inner heat exchanger 702 is integrated in the first exhaust bin 301, and a refrigeration / heat cycle is formed through the compressor 703, the expansion valve and the four-way valve 705: in winter, the four-way valve 705 is controlled to switch the refrigerant flow direction, the refrigerant path is: compressor 703→four-way valve 705→inner heat exchanger 702 (condenser)→expansion valve 704→outer heat exchanger 701 (evaporator)→four-way valve 705→compressor 703, the outer heat exchanger 701 absorbs the waste heat in the return air, releases the heat to the fresh air through the inner heat exchanger 702 after being compressed by the compressor 703, and assists the fresh air preheating; in summer, the refrigerant path is: compressor 703→four-way valve 705→outer heat exchanger 701 (condenser)→expansion valve 704→inner heat exchanger 702 (evaporator)→four-way valve 705→compressor 703, the outer heat exchanger 701 releases the cold to the return air to recover the waste heat in the return air, the inner heat exchanger 702 absorbs the heat of the fresh air to realize refrigeration, and forms an "return air-fresh air" energy closed loop.

[0045] The working principle of the embodiment is as follows: the air supply fan 305 is controlled to send the external air (fresh air) to the indoor, the air exhaust fan 306 is controlled to send the indoor air (return air) to the outdoor, the fresh air enters the indoor in sequence through the first filter bin 501, the second air inlet 204, the second air inlet bin 202, the composite fin heat exchanger 4, the first exhaust bin 301 and the second air outlet 304 (as shown in the hollow arrow direction of the accompanying drawings of the specification Figure 4 The return air is discharged to the external environment in sequence through the first air inlet 203, the first air inlet bin 201, the composite fin heat exchanger 4, the second exhaust bin 302, the first air outlet 303 and the second filter bin 502 (as shown in the hollow arrow direction of the accompanying drawings of the specification Figure 4(As indicated by the solid arrow in the middle) During the process of fresh air entering the room, the primary filter 503 performs preliminary filtration, followed by secondary filtration through the pre-filter 205 and the medium-efficiency filter 206. Then, the composite finned heat exchanger 4 transfers heat from the return air to the fresh air. Next, the fresh air is reheated by the heat from the return air through the second surface cooler 602 and the internal heat exchanger 702. Subsequently, the heated and filtered fresh air is delivered into the room, while the return air passes through the external heat exchanger 701, the first surface cooler 601, and the composite finned heat exchanger 4. Heat exchanger 4 indirectly heats the fresh air. When the indoor and outdoor temperature difference is not significant, the inlet three-way valve 606 connects only the output of the water pump 605 to the input of the second surface cooler 602, while the outlet three-way valve 603 connects only the output of the second surface cooler 602 to the input of the first surface cooler 601. At this time, the water in the storage tank 604 can only circulate sequentially within the storage tank 604, water pump 605, inlet three-way valve 606, second surface cooler 602, first surface cooler 601, and storage tank 604 (as per the instruction manual). Figure 10 (As indicated by the solid arrow in the middle), the internal circulation mode is activated. When the temperature difference between indoors and outdoors is large, the inlet three-way valve 606 is controlled to connect only the output end of the first surface cooler 601 to the liquid storage tank 604, while the outlet three-way valve 603 connects only the output end of the second surface cooler 602 to the return water connector 608. At this time, the water in the liquid storage tank 604 only flows in the second surface cooler 602 (as shown in the instruction manual). Figure 9 (As indicated by the hollow arrow) When the external circulation mode is activated, the four sets of electric push rods 5055 are periodically extended or shortened. When the electric push rods 5055 are extended, the two sets of arc-shaped guide chambers 5053 in the first filter chamber 501 and the second filter chamber 502 unfold and fit together. At this time, the outside fresh air enters through the second filter chamber 502, then through one set of arc-shaped guide chambers 5053 and then enters the second air inlet chamber 202 through the second air inlet 204. The return air enters the first filter chamber 501 through another set of arc-shaped guide chambers 5053, and then exits through the first filter chamber 501, and blows the dust off the primary screen filter 503 in the first filter chamber 501.

[0046] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention.

Claims

1. A dual-cold-source high-efficiency filtration and heat recovery integrated fresh air handling unit, comprising a main warehouse body (1), characterized in that: The main chamber (1) is provided with an upper processing chamber mechanism (2) at the top inside, and a lower processing chamber mechanism (3) at the bottom inside. A composite finned heat exchanger (4) is installed in the middle of the main chamber (1). A dust removal filter mechanism (5) is provided at one end of the main chamber (1). A water circulation mechanism (6) is provided at the end of the main chamber (1) away from the filter mechanism (5). An air conditioning mechanism (7) for cooling is provided at the end of the main chamber (1) close to the water circulation mechanism (6). The upper processing chamber mechanism (2) includes a first air inlet chamber (201) and a second air inlet chamber (202). The first air inlet chamber (201) and the second air inlet chamber (202) are respectively provided with a first air inlet (203) and a second air inlet (204) at their ends that are far apart from each other. A primary filter (205) is installed at the end of the second air inlet chamber (202) near the second air inlet (204). A medium-efficiency filter (206) is installed at the end of the second air inlet chamber (202) far away from the second air inlet (204). The interiors of the first air inlet chamber (201) and the second air inlet chamber (202) are not connected. The lower processing chamber mechanism (3) includes a first exhaust chamber (301) located directly below the first air inlet chamber (201) and a second exhaust chamber (302) located directly below the second air inlet chamber (202). The interiors of the first exhaust chamber (301) and the second exhaust chamber (302) are not connected. The second exhaust chamber (302) is connected to the interior of the first air inlet chamber (201) through a composite finned heat exchanger (4). The interiors of the first exhaust chamber (301) and the second air inlet chamber (202) are connected through a composite finned heat exchanger (4). A second exhaust port (304) and a first exhaust port (303) are respectively provided at the ends of the first exhaust chamber (301) and the second exhaust chamber (302) that are far apart from each other. A blower (305) and an exhaust fan (306) are respectively installed at the ends of the first exhaust chamber (301) and the second exhaust chamber (302) that are far apart from each other. The filtration mechanism (5) includes a first filter chamber (501) installed outside the second air inlet (204) and a second filter chamber (502) installed outside the first air outlet (303). The first filter chamber (501) and the second filter chamber (502) are both equipped with a primary filter screen (503) and a louvered fan (504) at the end away from the main chamber (1). The first filter chamber (501) and the second filter chamber (502) are both provided with a switching component (505) on both sides. The switching component (505) includes an arc-shaped guide chamber (5053), which is provided in two sets. The first filter chamber (501) has a first interface (5051) symmetrically opened on both sides, and the second filter chamber (502) has a second interface (5052) symmetrically opened on both sides. The first interface (5051) and the second interface (5052) on the same side are connected through an adjacent set of arc-shaped guide chambers (5053). The inner sides of the first filter chamber (501) and the second filter chamber (502) are both centrally hinged with guide plates (5... 054), one end of the inner side of the first interface (5051) and the second interface (5052) is hinged with an electric push rod (5055). The output end of the electric push rod (5055) is hinged to the middle position of an adjacent set of guide plates (5054). The two sets of guide plates (5054) in the two sets of first interfaces (5051) are centrally symmetrically arranged. The two sets of guide plates (5054) in the two sets of second interfaces (5052) are also centrally symmetrically arranged. The rotating shafts of the two sets of guide plates (5054) at the same height are connected by a synchronous component (506).

2. The integrated fresh air handling unit with dual cold source high-efficiency filtration and heat recovery as described in claim 1, characterized in that, The synchronization component (506) includes a synchronization pulley and a synchronization belt. The shafts of two sets of guide plates (5054) at the same height extend to the outside of the chamber and are equipped with synchronization pulleys. The outer sides of the two sets of synchronization pulleys are jointly provided with a synchronization belt.

3. The integrated fresh air handling unit with dual cold source high-efficiency filtration and heat recovery as described in claim 1, characterized in that, The first filter chamber (501) and the second filter chamber (502) are symmetrically provided with two sets of arc-shaped sliding grooves at their inner top and inner bottom. The top and bottom of the guide plate (5054) are equipped with arc-shaped sliders that are adapted to the arc-shaped sliding grooves.

4. The integrated fresh air handling unit with dual cold source high-efficiency filtration and heat recovery as described in claim 1, characterized in that, The water circulation mechanism (6) includes a first surface cooler (601) and a second surface cooler (602). The first surface cooler (601) is located inside the first air inlet chamber (201), and the second surface cooler (602) is located inside the first air outlet chamber (301). The input end of the first surface cooler (601) and the output end of the second surface cooler (602) are connected through a three-way outlet valve (603). A liquid storage tank (604) is installed on one side inside the first air outlet chamber (301). The output end of a surface cooler (601) is connected to the inner top of the liquid storage tank (604). A water pump (605) is installed on the side of the first exhaust chamber (301) near the liquid storage tank (604). The output end of the water pump (605) is connected to the input end of the second surface cooler (602) through a three-way inlet valve (606). The third connector of the three-way inlet valve (606) is connected to the inner top of the liquid storage tank (604). The input end of the water pump (605) is connected to the inner bottom of the liquid storage tank (604).

5. The integrated fresh air handling unit with dual cold source high-efficiency filtration and heat recovery according to claim 4, characterized in that, The third connector of the outlet three-way valve (603) is equipped with a return water connector (608), and a water supply connector (607) that communicates with the bottom of the liquid storage tank (604) is installed on one side of the main body (1).

6. The integrated fresh air handling unit with dual cold source high-efficiency filtration and heat recovery according to claim 1, characterized in that, The air conditioning unit (7) includes a compressor (703) located on the top side inside the first exhaust chamber (301). An external heat exchanger (701) is installed inside the first air inlet chamber (201), and an internal heat exchanger (702) is installed inside the first exhaust chamber (301). The internal heat exchanger (702) is located directly below the external heat exchanger (701). The output end and input end of the compressor (703) are connected to the inlet end of the external heat exchanger (701) and the outlet end of the internal heat exchanger (702) through a four-way valve (705). The outlet end of the external heat exchanger (701) is connected to the inlet end of the internal heat exchanger (702) through an expansion valve (704).

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