Fresh air dehumidification equipment

Abstract

The utility model relates to a new trend equipment technical field, especially a kind of new trend dehumidification equipment, including mainframe box and outdoor unit, the first return air opening for recycling indoor air is arranged on the mainframe box, air supply is used to deliver air to indoor, exhaust port is used to discharge indoor air to outdoor, fresh air inlet is used to inhale outdoor air, the second return air opening for recycling indoor air, the air supply area that is communicated with air supply is formed in the mainframe box, the evaporation main body mechanism for reheating dehumidification is installed in the air supply area, the evaporation main body mechanism includes reheater and evaporator, the high-pressure pipe and low-pressure pipe are connected to the evaporation main body mechanism, the four-way valve and condenser are in the outdoor unit, the high-pressure pipe and low-pressure pipe are connected to four-way valve and condenser respectively, and multi-mode can effectively recycle and utilize air.

Description

Technical Field

[0001] This utility model relates to the field of fresh air equipment technology, and in particular to a fresh air dehumidification device. Background Technology

[0002] Currently mainstream fresh air systems on the market: 1. One type is the total heat exchange type fresh air unit. 2. One type is an integrated fresh air dehumidifier with dehumidification function. The two types of fresh air systems commonly found on the market mentioned above have the following disadvantages: Total heat recovery fresh air system does not have air handling functions such as cooling, heating, and dehumidification, which are precisely the more important functions in actual use.

[0003] Integrated fresh air dehumidifiers: These integrate the compressor, evaporator, condenser, etc. into one unit. They have two problems: First, they are all heating and dehumidifying processes, and cannot cool or heat. Second, due to their size and structure, they have low dehumidification capacity and high noise.

[0004] There are also dehumidifiers and other structures similar to air conditioners, which either cannot achieve deep dehumidification, cannot adjust the air outlet temperature, have some functional deficiencies, or have an extremely complex structure that is not practical.

[0005] This addresses the multi-functional needs of existing operating environments. Current environments require cooling, heating, dehumidification, and fresh air. Existing solutions involve adding equipment, such as installing an air conditioner, dehumidifier, and fresh air system. This combination is not only structurally complex but also extremely inconvenient to operate, resulting in a poor user experience and often failing to achieve the desired effect. Utility Model Content

[0006] The purpose of this invention is to provide a new air dehumidification device that can operate in multiple modes and effectively recycle and utilize air.

[0007] The above-mentioned objective of this utility model is achieved through the following technical solution: a fresh air dehumidification device, comprising a main unit and an outdoor unit, wherein the main unit is provided with a first return air inlet for recovering indoor air, an air supply inlet for supplying air to the room, an exhaust air inlet for discharging indoor air to the outside, a fresh air inlet for drawing in outdoor air, and a second return air inlet for recovering indoor air; an air supply zone communicating with the air supply inlet is formed inside the main unit, and an evaporation main body mechanism for reheat dehumidification is installed in the air supply zone; the evaporation main body mechanism includes a reheater and an evaporator; the evaporation main body mechanism is connected to a high-pressure pipe and a low-pressure pipe; the outdoor unit has a four-way valve and a condenser; the high-pressure pipe and the low-pressure pipe are respectively connected to the four-way valve and the condenser.

[0008] As a preferred embodiment of this utility model, the main unit is surrounded and fixed by a front side panel, a left side panel, a rear side panel, a right side panel, an upper side panel, and a lower side panel.

[0009] As a preferred embodiment of this utility model, the first return air vent and the supply air vent are both located on the left side panel and arranged at intervals, the exhaust air vent and the fresh air vent are both located on the right side panel and arranged at intervals, and the second return air vent is located on the rear side panel and arranged to the right.

[0010] As a preferred embodiment of this utility model, a first partition is installed between the left side plate and the right side plate. The left end of the first partition is connected to the left side plate and is located between the front and rear of the first return air inlet and the supply air inlet. The right end of the first partition is connected to the right side plate and is located between the front and rear of the exhaust air inlet and the fresh air inlet. A filter assembly is connected between the first partition and the rear side plate. The front side plate, left side plate, first partition, and right side plate surround to form an exhaust air area. The left side plate, first partition, filter assembly, and rear side plate surround to form the supply air area. The high-pressure pipe and low-pressure pipe extend out of the rear side plate. The first partition, filter assembly, rear side plate, and right side plate surround to form a mixed air intake area for both the fresh air inlet and the second return air inlet to enter the air. The second return air inlet is located to the right of the filter assembly. The mixed air intake area is also provided with a damper located to the right of the second return air inlet. The damper is connected between the first partition and the rear side plate.

[0011] As a preferred embodiment of this utility model, a supply fan is installed and connected in the air supply zone, with the inlet of the supply fan located in the air supply zone and the outlet connected to the air supply port; an exhaust fan is installed and connected in the exhaust zone, with the inlet of the exhaust fan located in the exhaust zone and the outlet connected to the exhaust port.

[0012] As a preferred embodiment of this invention, a rhomboid-shaped total heat exchanger is installed and connected inside the main unit chassis.

[0013] As a preferred embodiment of this utility model, the air supply outlet and the air exhaust outlet are both arranged on the left side panel and are spaced apart from each other, while the second return air outlet, the first return air outlet and the fresh air outlet are all arranged on the right side panel and are spaced apart from each other.

[0014] As a preferred embodiment of this utility model, the total heat exchanger is located in the rear right position inside the main unit casing. A second partition is installed between the left side panel and the total heat exchanger. The left end of the second partition is connected to the left side panel and is positioned between the front and rear of the air supply port and the air exhaust port. The right end of the second partition is connected to the left end of the total heat exchanger. A filter assembly is connected between the front end of the total heat exchanger and the front side panel. A third partition is connected between the rear end of the total heat exchanger and the rear side panel. A fourth partition is connected between the right end of the total heat exchanger and the right side panel. The right end of the fourth partition is connected to the fourth partition and is positioned between the front and rear of the first return air port and the fresh air port.

[0015] In a preferred embodiment of this invention, the front side plate, left side plate, second partition, left front outlet portion of the total heat exchanger, and filter assembly surround to form an air supply zone; the second partition, left side plate, rear side plate, third partition, and left rear outlet portion of the total heat exchanger surround to form an exhaust zone; the front side plate, filter assembly, right front inlet portion of the total heat exchanger, fourth partition, and right side plate surround to form a return air zone; and the fourth partition, right rear inlet portion of the total heat exchanger, third partition, rear side plate, and right side plate surround to form a fresh air intake zone.

[0016] As a preferred embodiment of this utility model, the high-pressure pipe and the low-pressure pipe pass through the third partition and the rear side plate and extend out of the rear side plate. A wind valve is installed and connected between the third partition and the fourth partition at the position of the right rear inlet of the fresh air inlet area near the total heat exchanger.

[0017] The beneficial effects of this utility model are as follows: Some indoor air has no recycling value, such as air from bathrooms, kitchens, and smoking rooms. If all of it is discharged directly according to the traditional fresh air solution, it will waste energy. If only part of it is discharged, it will be easy for odors to enter the room.

[0018] This solution divides indoor air into usable and non-usable areas that are directly exhausted, separated by two return air vents. Heavier pollutants are directly exhausted, while less pollutant pollutants are recycled, reducing energy consumption and extending the lifespan of the filters. Attached Figure Description

[0019] Figure 1 This is a top view of the main unit casing of the fresh air dehumidification equipment in Example 1; Figure 2 yes Figure 1 A schematic diagram of the three-dimensional structure in the disassembled state of the middle structure; Figure 3 This is a top view of the fresh air dehumidification equipment in Example 1; Figure 4 yes Figure 1 Top view of the middle structure after the upper side panel has been removed; Figure 5 yes Figure 2 A three-dimensional structural diagram of the evaporation main body mechanism in the diagram; Figure 6 yes Figure 5 A bottom view; Figure 7 yes Figure 5 A schematic diagram of the three-dimensional structure in the disassembled state of the middle structure; Figure 8 yes Figure 7 Assembly diagram of the various components of the central structure; Figure 9 This is a schematic diagram of the cooling cycle principle of the fresh air system in Example 1; Figure 10 This is a schematic diagram of the heating cycle principle of the fresh air system in Example 1; Figure 11 This is a schematic diagram of the reheat and dehumidification cycle principle of the fresh air system in Example 1; Figure 12 This is a control principle diagram of the fresh air system in Example 1 for regulating indoor temperature and humidity; Figure 13 This is a diagram showing the internal circulation mode of the fresh air dehumidification equipment in Example 1. Figure 14 This is a diagram showing the air mixing mode of the fresh air dehumidification equipment in Example 1 during operation; Figure 15 This is a diagram showing the fresh air mode of the fresh air dehumidification equipment in Example 1. Figure 16 This is a top view of the main unit casing of the fresh air dehumidification equipment in Example 2; Figure 17 yes Figure 16 A schematic diagram of the three-dimensional structure in the disassembled state of the middle structure; Figure 18 yes Figure 16 Top view of the middle structure after the upper side panel has been removed; Figure 19 This is a diagram showing the internal circulation mode of the fresh air dehumidification equipment in Example 2. Figure 20 This is a diagram showing the air mixing mode of the fresh air dehumidification equipment in Example 2. Figure 21 This is a diagram showing the fresh air mode of the fresh air dehumidification equipment in Example 2. Detailed Implementation

[0020] The present invention will be further described in detail below with reference to the accompanying drawings.

[0021] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of the present utility model.

[0022] Example 1, such as Figure 1-15As shown, a fresh air dehumidification device includes a main unit and an outdoor unit 55. The main unit is equipped with a first return air inlet 2 for recovering indoor air, an air supply outlet 3 for supplying air to the room, an exhaust outlet 4 for discharging indoor air to the outside, a fresh air inlet 5 for drawing in outdoor air, and a second return air inlet 6 for recovering indoor air. An air supply zone f1 communicating with the air supply outlet 3 is formed inside the main unit. An evaporation main body mechanism for reheat dehumidification is installed in the air supply zone f1. The evaporation main body mechanism includes... The unit includes a reheater 38 and an evaporator 39. The evaporator body is connected to a high-pressure pipe 42 and a low-pressure pipe 53. The outdoor unit 55 contains a four-way valve 58 and a condenser 59. The high-pressure pipe 42 and the low-pressure pipe 53 are respectively connected to the four-way valve 58 and the condenser 59. The main unit is assembled and fixed by a sheet metal shell structure. Two return air vents are used to absorb indoor polluted air; the supply air vent 3 connects to the indoor environment to supply clean air; the fresh air vent connects to outdoor air; and the exhaust vent exhausts indoor polluted air. The high-pressure pipe 42 and the low-pressure pipe 53 supply refrigerant and connect to the corresponding refrigerant-supplying four-way valve 58 and condenser 59 in the outdoor unit 55 to achieve heat transfer control. The design of two return air vents makes indoor air control more effective and provides greater advantages in terms of utilization.

[0023] Specifically, the main unit chassis is surrounded and fixed by a front side panel 101, a left side panel 102, a rear side panel 103, a right side panel 104, an upper side panel 105, and a lower side panel 106. These panels can be made of conventional sheet metal and are preferably fixed using existing detachable methods for easy maintenance and replacement. Of course, some side panels can also be fixed by welding or other methods. These rectangular chassis are quite common and will not be described in detail. The aforementioned air vents can be made of short round pipe structures and installed on the corresponding side panels, such as the left side panel, right side panel, or rear side panel. Of course, these side panels need to have corresponding mounting holes for the installation and fixing of each air vent.

[0024] These side panels can be multi-layered or stacked. In particular, the lower side panel 106 can be assembled from two layers of panels, which are connected by existing easy-to-disassemble snap-fit ​​structures, hinge structures, or bolt-type threaded connections. The upper panel can have some maintenance holes, and this upper panel can be fixed to the lower part of the front side panel 101, left side panel 102, rear side panel 103, and right side panel 104 using existing fixing methods. In this way, the lower panel provides protection and reinforcement. When maintenance is needed, the lower panel can be disassembled and maintenance can be carried out through the maintenance holes on the upper panel of the lower side panel 106. Since this type of main unit is usually placed on the top of the building, maintenance is usually carried out from the bottom. Of course, this structural method can also be used for the upper side panel 105, allowing maintenance from the top.

[0025] The following is a specific implementation example. The first return air vent 2 and the supply air vent 3 are both set on the left side panel 102 and arranged at intervals. The exhaust air vent 4 and the fresh air vent 5 are both set on the right side panel 104 and arranged at intervals. The second return air vent 6 is set on the rear side panel 103 and arranged to the right. This arrangement is for parallel airflow, not a cross-shaped design.

[0026] Specifically, a first partition g1 is installed between the left side panel 102 and the right side panel 104. The first partition g1 can be straight or bent, mainly dividing the internal area of ​​the main unit into front and rear sections. The left end of the first partition g1 is connected to the left side panel 102 and is located between the first return air vent 2 and the first supply air vent 3. The right end of the first partition g1 is connected to the right side panel 104 and is located between the exhaust air vent 4 and the fresh air vent 5. The first partition g1 is connected to the rear side panel 103. A filter assembly 17 is provided, which can be a filter accessory using a filter screen. The front side plate 101, the left side plate 102, the first partition g1 and the right side plate 104 surround and form an exhaust zone f2. The first return air vent 2 and the exhaust air vent 4 are located on the left and right sides of the exhaust zone f2, forming the first air duct, which is the exhaust channel. The polluted air drawn in from the room is drawn in through the first return air vent 2, passes through the exhaust zone f2, and is then discharged to the outside through the exhaust air vent 4. This part of the air duct is used to treat indoor air that is relatively polluted and does not need to go through internal circulation.

[0027] Furthermore, the left side plate 102, the first partition g1, the filter assembly 17, and the rear side plate 103 surround and form the air supply zone f1. The left side of the air supply zone f1 corresponds to the air outlet 3, while the right side receives air filtered by the filter assembly 17. The air supply zone f1 contains a reheater 38 and an evaporator 39. The high-pressure pipe 42 and the low-pressure pipe 53 extend out of the rear side plate 103. The first partition g1, the filter assembly 17, the rear side plate 103, and the right side plate 104 surround and form a mixed air intake zone f3 for both the fresh air inlet 5 and the second return air inlet 6 to receive air. The mixed air intake zone f3, the filter assembly 17, and the air supply zone f1 form a second air duct. This air duct receives return air from the room or fresh air from the outside, or both. After passing through the fresh air inlet and the second return air inlet 6, and being filtered by the filter assembly, the air is then processed by the reheater 38 and the evaporator 39 before being delivered into the room through the air outlet 3.

[0028] The second return air inlet 6 is located on the right side of the filter assembly 17. The mixed air inlet zone f3 is also equipped with a damper 18 located on the right side of the second return air inlet 6. The damper 18 is connected between the first partition g1 and the rear side plate 103. The damper 18 is close to the fresh air inlet 5 and corresponds to the fresh air inlet 5. The internal circulation and mixed air modes are distinguished by closing and opening the damper.

[0029] Controlled by the air valve, the first air duct remains unchanged. This air duct absorbs indoor air with a relatively high level of pollution, such as that from the bathroom, kitchen, and smoking room. This part of the air is directly discharged, and the air entering here is discharged through the first return air vent 2. The second return air vent 6 absorbs air with lower levels of pollution from areas such as bedrooms and studies, and can purify and reuse the air. The control mode is achieved by closing the vent's damper. The damper for the second return air vent 6 can be externally mounted or integrated into the vent's structure. 1. Internal circulation mode: Close the air valve corresponding to the fresh air inlet. This mode is mainly for situations where humidity cannot be removed, and it absorbs all indoor air to dehumidify. 2. Mixed Air Mode: This is the normal mode. All air valves are open, absorbing indoor return air and fresh air, processing them, and then sending them into the room.

[0030] 3. Fresh Air Mode: This mode is used when the indoor environment is stuffy and has a strong odor, and fresh air is urgently needed. In this mode, the second return air vent 6 is closed, and all fresh outdoor air is drawn in.

[0031] Of course, these air vents need to be connected to the corresponding areas via ductwork in order to carry out air intake and exhaust operations.

[0032] In addition, an air supply fan 21 is installed and connected in the air supply zone f1. The inlet of the air supply fan 21 is in the air supply zone f1 and the outlet is connected to the air supply port 3. An exhaust fan 16 is installed and connected in the exhaust zone f2. The inlet of the exhaust fan 16 is in the exhaust zone f2 and the outlet is connected to the exhaust port 4. The fan is a conventional fan that can be installed and fixedly connected in the main unit box.

[0033] Based on the above-mentioned equipment, the following describes a new fresh air system that optimizes temperature and humidity control by using the overall structure of the aforementioned fresh air dehumidification equipment.

[0034] Specifically, a fresh air system includes a main unit housing and an outdoor unit 55. The main unit housing has an air supply zone f1, in which a reheater 38 and an evaporator 39 are installed and connected. The outdoor unit 55 has a four-way valve 58, a condenser 59, and a compressor 57. The reheater 38 and the evaporator 39 are connected by a high-pressure pipe 42 and a low-pressure pipe 53, which are respectively connected to the four-way valve 58 and the condenser 59. The reheater 38 is connected in parallel to the high-pressure side of the evaporator 39 via a pipeline. The high-pressure pipe 42 is located on the high-pressure side of the evaporator 39, and the low-pressure pipe 53 is located on the low-pressure side of the evaporator 39. One end of the four-way valve 58 is connected to a low-pressure external pipe 56a, and one end of the condenser 59 is connected to a high-pressure external pipe 56b. The low-pressure pipe 53 and the low-pressure external pipe 56a are connected together, and the high-pressure pipe 42 and the high-pressure external pipe 56b are connected together. Through the joint design of the reheater 38, evaporator 39, and condenser 59, the system temperature and humidity controllability is improved. The above-mentioned component structures can all use existing products; the only improvement is in the connection method. For example, the high- and low-pressure pipe structures can use existing pipe products suitable for air conditioning or fresh air systems. The distinction between low-pressure and high-pressure pipes is mainly based on the working pressure range, and standards vary slightly across different industries. Taking a refrigeration system as an example: Low-pressure pipe: pressure range is generally 0.1~0.5 MPa [gauge pressure]. High-pressure pipe: pressure range is generally 1.5~3.0 MPa. Here, high pressure and low pressure are relative designs. The pressure difference in the pipes on both sides of the evaporator is relatively large, so there are low pressure side and high pressure side. The specific pressure value can be selected according to the needs.

[0035] Furthermore, one end of the condenser 59 is connected to the other end of the four-way valve 58, and the input and output ends of the compressor 57 are connected to the remaining two ends of the four-way valve 58, respectively. This is a conventional connection method inside the outdoor unit, which will not be described in detail here.

[0036] Furthermore, a low-pressure shut-off valve 60a is installed on the low-pressure external connector 56a, and a high-pressure shut-off valve 60b is installed on the high-pressure external connector 56b. These valves on the pipeline effectively control the flow rate of the pipeline.

[0037] The reheater 38 has a reheater inlet 38a and a reheater outlet 38b, and the evaporator 39 has an evaporator outlet 39a and an evaporator inlet 39b. There are multiple evaporator outlets 39a and evaporator inlets 39b. The low-pressure pipe 53 is connected to the evaporator outlet 39a through the gas collecting pipe 52.

[0038] Furthermore, the gas collecting pipe 52 has three sections, each connecting to one of the three evaporator outlets 39a. This forms multiple sets of parallel pipelines, resulting in better stability and improved efficiency.

[0039] Preferably, the high-pressure pipe 42 is also connected to a first high-pressure branch pipe 421 and a second high-pressure branch pipe 422 via a first tee 400. A reheat solenoid valve 40 is installed on the first high-pressure branch pipe 421, and its other end is connected to a reheater inlet connection pipe 43. The other end of the reheater inlet connection pipe 43 is connected to the reheater inlet 38a. An evaporation solenoid valve 41 is installed on the second high-pressure branch pipe 422, and its other end is connected to an evaporator inlet connection pipe 44. The other end of the evaporator inlet connection pipe 44 is connected to one port of the second tee 48. The reheater... Outlet 38b is connected to a reheater outlet connection pipe 45. A one-way valve 46 is installed on the reheater outlet connection pipe 45, and its other end is connected to another port of the second three-way valve 48. The remaining port of the second three-way valve 48 is connected to an electronic expansion valve 49 via a manifold 480. The manifold 480 connects the evaporator inlet connection pipe 44 and the reheater outlet connection pipe 45 through a three-way valve into the expansion valve. The other end of the electronic expansion valve 49 is connected to a distributor head 51, which is connected to the evaporator inlet 39b via a distributor capillary tube 50. The first and second three-way valves can be either three-way pipes or three-way valves, mainly for branching purposes. Through the above-described pipe connections, a basic pipe network with better temperature and humidity controllability is formed.

[0040] Furthermore, the dispensing capillary 50 has three sections, each of which is connected to one of the three evaporator inlets 39b.

[0041] Based on this, we will briefly describe an implementation case: Based on the refrigerant flow path in refrigeration mode: the main evaporator structure is divided into a reheater 38 and an evaporator 39. The evaporator fins are thicker, while the reheater fins are thinner. From the perspective of air flow, air first passes through the evaporator for cooling and dehumidification, and then flows through the reheater. Its piping is divided into four parts: The first part consists of a high-pressure pipe 42 connected at one end to the high-pressure external pipe 56b on the side of the outdoor unit, and the other end is divided into two branches via the first tee 400. Each branch has a solenoid valve. One branch goes through the reheat solenoid valve 40 to connect to the reheater inlet pipe 43 and then to the reheater inlet 38a. The other branch goes through the evaporation solenoid valve 41 to connect to the evaporator inlet pipe 44 and then to one of the ports of the second tee 48. Part 2: The reheater outlet 38b is connected to the reheater outlet connection pipe 45, which is equipped with a one-way valve 46. The other end of the reheater outlet connection pipe 45 is connected to one of the other ports of the second tee 48. Part 3: The two refrigerants that come in through the second three-way valve 48 are regulated by the electronic expansion valve 49 and then divided into three paths by the distributor head 51. Each path is connected to a distributor capillary tube 50, and the three paths are respectively connected to the three evaporator inlets 39b of the evaporator. Part 4: Three gas collecting pipes 52 are connected to the low-pressure pipe 53, and the three gas collecting pipes 52 are respectively connected to the three ports of the evaporator outlet 39a, while the other end of the low-pressure pipe 53 is connected to the low-pressure external pipe 56a.

[0042] Its flow path includes: ① Temperature and dehumidification mode: High pressure pipe 42 → Reheat solenoid valve 40 → Reheater → Check valve → Electronic expansion valve → Evaporator → Gas collecting pipe → Low pressure pipe; ② Cooling mode and cooling and dehumidification mode: High pressure pipe 42 → Evaporation solenoid valve 41 → Electronic expansion valve → Evaporator → Gas collecting pipe → Low pressure pipe; ③ Heating mode: Low pressure pipe → Gas collecting pipe → Evaporator → Electronic expansion valve → Evaporation solenoid valve 41 → High pressure pipe.

[0043] This piping design allows the evaporator to operate in several different modes.

[0044] First, it should be noted that this machine is designed for use with an outdoor unit. The outdoor unit can be a standard split unit, a multi-split unit, or other equipment with heat and cold source delivery capabilities. Here, we will use a simple split unit as an example for easier understanding.

[0045] In other words, based on the control method of the aforementioned system, three control modes will be formed: the first mode is the cooling mode; the second mode is the heating cycle mode; and the third mode is the temperature-regulating dehumidification or reheat dehumidification mode.

[0046] In the first mode, the evaporator solenoid valve 41 is energized and opens, while the reheat solenoid valve 40 is de-energized and closes. The high-temperature, high-pressure gaseous refrigerant discharged from the compressor 57 flows through the four-way valve 58 to the condenser 59, where it condenses and releases heat. It then passes through the evaporator solenoid valve 41 and is throttled by the electronic expansion valve 49 into a low-temperature, low-pressure liquid refrigerant. This liquid refrigerant absorbs heat and evaporates in the evaporator 39, cooling and dehumidifying the air flowing through it. The cooled air is then sent into the room, and the refrigerant, having absorbed heat, is drawn back into the compressor 57, completing the refrigeration cycle. In the second mode, the evaporator solenoid valve 41 is energized and opens, while the reheat solenoid valve 40 is de-energized and closes. The high-temperature, high-pressure gaseous refrigerant discharged from the compressor 57... After passing through the four-way valve 58, the refrigerant first passes through the indoor evaporator 39, where it condenses and releases heat, heating the air flowing through it before being sent into the room. After condensation, the refrigerant passes through the electronic expansion valve 49 and the condenser 59 before being drawn into the compressor 57, completing the heating process. In the third mode, the evaporation solenoid valve 41 is not electrically closed, while the reheat solenoid valve 40 is energized and opened. The high-temperature, high-pressure gaseous refrigerant discharged by the compressor 57 first passes through the condenser 59 for primary condensation, then through the reheater 38 for secondary condensation, and then through the electronic expansion valve 49 for regulation before entering the evaporator 39. This cools and dehumidifies the air flowing through it before being sent into the room, and the refrigerant absorbs heat before being drawn into the compressor 57.

[0047] Furthermore, in the third mode, temperature and humidity adjustment methods are included: Upon system startup, the system detects the user-set temperature (ts) and humidity (hs), while simultaneously monitoring the indoor temperature (t1) and indoor humidity (h1) in real time. The system then enters the first set of judgment logic. If the indoor temperature (t1) > the set temperature, cooling is activated until (t1) < (ts) + a, where a is a system-set parameter. Cooling continues until (t1) < 24, and the value of a is adjustable. If the indoor temperature (t1) < the set temperature, heating is activated until (t1) > (ts) + c, where c is an adjustable parameter. When the temperature is reached, the system enters the second set of logic judgment. This second set of logic determines the humidity range and then proceeds to the next step. The system determines the humidity level. If h1 ≥ hs, it indicates excessive humidity. Initiating temperature and humidity control, the system will run. Then, it will proceed to the next step. If, after time t, h1 ≥ hs + b (where t and b are set parameters), it means that if the humidity remains high after a certain time t, exceeding the set hs plus the fluctuation value b, the humidity has not been reduced. In this case, the fresh air inlet valve will be closed, and the internal circulation dehumidification mode will be executed, meaning the fresh air inlet will be closed, and only indoor air will be drawn in. On the other hand, if h1 < hs + d (where d is a set parameter and d is the fluctuation value), it indicates that the humidity is too low, and humidification is required. If the humidity is within the set range, the ventilation mode will be maintained, and the outdoor unit will be shut down.

[0048] Based on the above solution, a specific example will also be given: 1. Cooling Mode: When the system is running in cooling mode, the evaporation solenoid valve 41 is energized and opened, while the reheat solenoid valve is de-energized and closed. The high-temperature and high-pressure gaseous refrigerant discharged by the compressor 57 flows through the condenser 59 via the four-way valve 58, condenses and releases heat to become a medium-temperature liquid refrigerant, then passes through the evaporation solenoid valve 41, and is throttled by the electronic expansion valve 49 to become a low-temperature and low-pressure liquid refrigerant. It then absorbs heat and evaporates in the evaporator 39, cooling and dehumidifying the air that flows through it. The cooled air is then sent into the room, and the refrigerant that has absorbed heat is then drawn into the compressor to complete the refrigeration cycle.

[0049] In this method, the air supplied to the room performs the functions of cooling and dehumidification.

[0050] 2. Heating Cycle: The heating cycle is the reverse process of the refrigeration cycle: At this time, the evaporation solenoid valve 41 is energized and opened, and the reheat solenoid valve is de-energized and closed. The high-temperature and high-pressure gaseous refrigerant discharged by the compressor passes through the other flow path of the four-way valve 58 and first passes through the evaporator on the indoor side, where it condenses and releases heat. This heats the air flowing through the evaporator and sends it into the room. After the refrigerant condenses, it passes through the electronic expansion valve and the condenser before being drawn into the compressor, completing the heating process.

[0051] In this method, the air supplied to the room is used for heating.

[0052] 3. Temperature-controlled dehumidification or reheat dehumidification: Unlike traditional centralized reheat dehumidification, which has no condenser, only an evaporator and a reheater, the reheater's heating capacity is greater than the evaporator's cooling capacity. This results in the air temperature flowing through the system undergoing a process of first cooling down and then heating up, with the temperature rise being greater than the temperature drop. This means that the air flowing through the system is always in a heating process, and the outlet air temperature cannot be adjusted.

[0053] In this embodiment, the heat between the evaporator, reheater, and condenser can be dynamically adjusted. Reheat dehumidification cycle: At this time, the evaporator solenoid valve is not electrically closed, and the reheat solenoid valve is electrically opened. The high-temperature and high-pressure gaseous refrigerant discharged by the compressor is first condensed once by the condenser, then condensed a second time by the reheater, and then enters the evaporator after being regulated by the electronic expansion valve. The air flowing through it is cooled and dehumidified and then sent into the room. The refrigerant absorbs heat and is then drawn into the compressor.

[0054] The advantages of this method are: the refrigerant temperature is lower after condensation in the condenser and reheater, resulting in better heat dissipation; the evaporator has better cooling and dehumidification effects, and higher efficiency. When the outdoor temperature is very high, conventional condensers have difficulty releasing heat to the condenser, resulting in high system pressure. This method, however, uses a reheater, through which the air temperature is low, making heat release during condensation simple, reducing condensation pressure, and improving system energy efficiency. The air outlet temperature can be adjusted. When the indoor temperature is high, the heat output can be reduced to lower the temperature of the air supplied into the room, thus cooling the room. Conversely, when the indoor temperature is low, the heat output can be increased to raise the temperature of the air supplied into the room, thus warming the room.

[0055] Ideally: evaporator cooling capacity + compressor self-heating = condenser heat release + reheater heat release. With the recooling capacity and self-heating constant, the supply air temperature can be adjusted by dynamically regulating the condenser heat release and reheater heat release.

[0056] Based on this, this embodiment optimizes and forms a set of control logic for precisely regulating indoor temperature and humidity. This is specifically designed for the temperature-regulating dehumidification / reheating dehumidification cycle mode.

[0057] The system detects indoor temperature t1 and humidity h1, sets temperature ts and humidity hs, and places temperature and humidity probes / sensors at each air vent as adjustment parameters. The system is essentially a conventional control system integrated into an existing automatic controller. Such systems can regulate valve opening and closing, fan and damper operation, etc. They can also collect various temperature and humidity parameters through sensors, perform data settings and comparisons, and then execute the corresponding opening and closing of valves, fans, dampers, outdoor units, etc. These are all existing, simple procedures and conventional technologies, which will not be elaborated upon here. They are easily applicable to this embodiment. This automatic controller, or control box, can be installed and connected to the rear panel.

[0058] When the system is powered on, the automatic controller inside the main unit detects the user-set temperature and humidity ts and hs, and simultaneously monitors the indoor temperature and humidity t1 and h1 in real time.

[0059] Entering the first set of judgment logic, if the indoor temperature t1 > the set temperature, the cooling mode is activated until t1 < ts + a, where a is a system setting parameter. For example, if the set temperature ts = 26℃ and a = -2, the cooling mode is activated until t1 < 24℃. The value of a is adjustable. If the indoor temperature t1 < the set temperature, the heating mode is activated until t1 > ts + c. Similarly, c is also an adjustable parameter. The goal of the first step is to make t1 reach the user's set temperature ts, at which point t1 = ts. Fluctuations within a certain allowable range can also be set. Then, the second set of logic checks the humidity range. When the temperature is reached, the humidity is checked. If h1 ≥ hs, it indicates excessive humidity, and the temperature and dehumidification program is run. Then, the next step checks if, after time t, h1 ≥ hs + b, where t and b are also set parameters (e.g., t is 10 minutes, b is -3%). This indicates that after a certain time t, the humidity is still high, exceeding the set hs. Adding the fluctuation value 'b' indicates that the humidity has not been reduced. In this case, the air valve at the fresh air inlet will be closed, and the internal circulation dehumidification mode will be executed, which means the fresh air inlet will be closed and only indoor air will be drawn in. On the other hand, if h1 < hs + d, where d is a set parameter and also a fluctuation value, for example, if d is 3%, it means that the humidity is too low and humidification needs to be performed. If the humidity is also suitable, the ventilation mode will be maintained and the outdoor unit will be shut down. Suitable humidity is within a range, for example, if hs is 40%-60%, the smallest range will be taken, such as 43%-57%. Within this range, it can be considered suitable.

[0060] The equipment provided in this embodiment can achieve precise control of temperature and humidity.

[0061] 1. Solves the problem of indoor air zoning: Some indoor air has no recycling value, such as air in bathrooms, kitchens, and smoking rooms. If all of it is discharged directly according to the traditional fresh air solution, it will waste energy. If only part of it is discharged, it will be easy for odors to enter the room.

[0062] In this embodiment, indoor air is divided into usable and non-usable areas that are directly discharged, and these areas are separated by two return air vents. Heavier pollutants are discharged directly, while less pollutant pollutants are recycled, reducing energy consumption and increasing the lifespan of the filter.

[0063] 2. Solves the problem of temperature and humidity coupling in traditional refrigeration equipment: Traditional solutions cannot control humidity when refrigerating, and cannot control temperature when controlling humidity. For example, humidity changes are inevitable during refrigeration.

[0064] This embodiment utilizes a powerful refrigeration system to decouple temperature and humidity, allowing for adjustable supply air temperature and achieving constant temperature dehumidification. A precise control logic is also designed to ensure system operation.

[0065] 3. Solves the problem of the single ventilation mode of traditional fresh air units: Some traditional fresh air units mostly use a fresh air mode in the air supply section. This method can easily send high-temperature outdoor air and low-temperature outdoor air directly in, which can cause discomfort to people and increase energy consumption.

[0066] This embodiment offers three air supply modes: fresh air mode, mixed air mode, and internal circulation mode. It also adjusts the air supply according to indoor temperature and humidity conditions, making it more user-friendly and energy-efficient.

[0067] 4. In addition, some portable and detachable structures made of existing sheet metal can be added to the side panel of the main unit chassis, which will allow for flexible maintenance, filter replacement and other operations.

[0068] Example 2, as Figure 16-21 As shown, a fresh air dehumidification device is described in this embodiment. Based on embodiment 1, the position of the air vents on the main unit and the internal structure have been changed, resulting in better improvements in energy recovery and air duct optimization.

[0069] Specifically, a diamond-shaped total heat exchanger 19 is installed and connected inside the main unit. It can exchange heat between the return air and the fresh air, recovering the energy of the exhaust air at low temperature in summer and the energy of the exhaust air at high temperature in winter.

[0070] Preferably, the air supply outlet 3 and the air exhaust outlet 4 are both located on the left side plate 102 and arranged at intervals, while the second return air outlet 6, the first return air outlet 2 and the fresh air outlet 5 are all located on the right side plate 104 and arranged at intervals, which facilitates the formation of staggered heat exchange ducts inside the total heat exchanger 19 after installation.

[0071] Preferably, the total heat exchanger 19 is located at the right rear of the main unit chassis. A second partition g2 is installed between the left side panel 102 and the total heat exchanger 19. The left end of the second partition g2 is connected to the left side panel 102 and is positioned between the air supply outlet 3 and the exhaust outlet 4. The right end of the second partition g2 is connected to the left end of the total heat exchanger 19. A filter assembly 17 is connected between the front end of the total heat exchanger 19 and the front side panel 101. A third partition g3 is connected between the rear end of the total heat exchanger 19 and the rear side panel 103. A fourth partition g4 is connected between the right end of the total heat exchanger 19 and the right side panel 104. The right end of the fourth partition g4 is connected to the fourth partition g4 and is positioned between the first return air outlet 2 and the fresh air outlet 5. Through the above structural design, the space inside the main unit chassis can be divided into four parts, specifically: The front side panel 101, left side panel 102, second partition g2, left front outlet portion 191 of the total heat exchanger 19, and filter assembly 17 surround to form an air supply zone f1. The second partition g2, left side panel 102, rear side panel 103, third partition g3, and left rear outlet portion 192 of the total heat exchanger 19 surround to form an exhaust zone f2. The front side panel 101, filter assembly 17, right front inlet portion 193 of the total heat exchanger 19, and fourth partition g2 surround to form an exhaust zone f2. The return air zone f4 is formed by the partition g4 and the right side partition 104. The fresh air intake zone f5 is formed by the partition g4, the right rear inlet 194 of the total heat exchanger 19, the third partition g3, the rear side partition 103 and the right side partition 104. These four zones are formed. The supply air zone f1 and the exhaust air zone f2 have been described above, only their positions are slightly changed here. The return air zone f4 only recycles indoor air, and the fresh air intake zone f5 only introduces fresh outdoor air. The total heat exchanger 19 is diamond-shaped and has two pairs of inlets and outlets: one pair is the left front outlet 191 and the right rear inlet 194, and the other pair is the left rear outlet 192 and the right front inlet 193. These two pairs of obliquely oriented inlet and outlet channels intersect to perform heat exchange. In conjunction with the aforementioned four zones, they form three air ducts. The right side panel of the return air zone f4 has a second return air inlet 6 and a first return air inlet 2, and the left side panel of the exhaust air zone f2 has an exhaust outlet 4. The first return air inlet 2 can be controlled to draw in relatively polluted air, while the second return air inlet 6 can be controlled to draw in air with low pollutant levels. The first return air inlet 2, the return air zone f4, the left rear outlet 192 and the right front inlet 193 of the total heat exchanger 19, the exhaust air zone f2, and the exhaust outlet 4 form the exhaust air ducts, used to exhaust polluted air to the outside. The left side panel of the air supply zone f1 has an air supply vent 3. The second return air vent 6, return air zone f4, filter assembly 17, air supply zone f1, and air supply vent 3 form an indoor air recovery duct, purifying and reusing the air. The right side panel 104 of the fresh air intake zone f5 has a fresh air vent 5. The final channel, consisting of the fresh air vent 5, fresh air intake zone f5, a pair of left front outlets 191 and right rear inlets 194 of the total heat exchanger 19, air supply zone f1, and air supply vent 3, forms a fresh air passage for outdoor air circulation, introducing outdoor fresh air. Of course, exhaust fans and supply fans can still be installed at the exhaust vent 4 and air supply vent 3 inside the main unit.

[0072] Preferably, the high-pressure pipe 42 and the low-pressure pipe 53 pass through the third partition g3 and the rear side plate 103 and extend out of the rear side plate 103. A damper 18 is installed and connected between the third partition g3 and the fourth partition g4 at a position near the right rear inlet portion 194 of the total heat exchanger 19 in the fresh air inlet area f5.

[0073] Similarly, this structure has three modes, controlled by air valves. The first return air inlet 2 of the exhaust duct draws in indoor air with relatively high levels of pollution from bathrooms, kitchens, smoking rooms, etc., and this air is directly discharged. The second return air vent 6 above is for absorbing air with lower levels of pollution from indoor areas such as bedrooms and studies, and can purify and reuse the air. The control mode is achieved by controlling the vent's damper to close. The damper of the return air vent can be external or integrated into the structure of the return air vent itself. Internal circulation mode: Close the air valve at the fresh air inlet. This mode is mainly for situations where humidity cannot be removed, and it absorbs all indoor air to dehumidify. Mixed Air Mode: This is the normal mode. All air dampers are open, absorbing indoor return air and fresh air, processing both, and then delivering them into the room. Fresh air mode: This mode is used when the indoor air is stuffy and has a strong odor, and fresh air is urgently needed. At this time, the second return air vent 6 is closed, and all fresh outdoor air is drawn in.

[0074] The heat exchange section of this embodiment can still adopt the design of the entire heat exchange structure of the new fresh air system in Embodiment 1, and the use of various hot and cold dehumidification modes can be inherited.

[0075] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A fresh air dehumidification device, characterized in that, The unit includes a main unit and an outdoor unit (55). The main unit is provided with a first return air vent (2) for recovering indoor air, an air supply vent (3) for supplying air to the room, an exhaust vent (4) for discharging indoor air to the outside, a fresh air vent (5) for drawing in outdoor air, and a second return air vent (6) for recovering indoor air. An air supply zone (f1) is formed inside the main unit and communicates with the air supply vent (3). An evaporation main body mechanism for reheating and dehumidification is installed in the air supply zone (f1). The evaporation main body mechanism includes a reheater (38) and an evaporator (39). The evaporation main body mechanism is connected to a high-pressure pipe (42) and a low-pressure pipe (53). The outdoor unit (55) has a four-way valve (58) and a condenser (59). The high-pressure pipe (42) and the low-pressure pipe (53) are respectively connected to the four-way valve (58) and the condenser (59).

2. The fresh air dehumidification device according to claim 1, characterized in that, The main unit is surrounded and fixed by a front side panel (101), a left side panel (102), a rear side panel (103), a right side panel (104), an upper side panel (105), and a lower side panel (106).

3. The fresh air dehumidification device according to claim 2, characterized in that, The first return air inlet (2) and the supply air inlet (3) are both located on the left side plate (102) and are arranged at intervals. The exhaust air inlet (4) and the fresh air inlet (5) are both located on the right side plate (104) and are arranged at intervals. The second return air inlet (6) is located on the rear side plate (103) and is arranged to the right.

4. The fresh air dehumidification device according to claim 3, characterized in that, A first partition (g1) is installed between the left side panel (102) and the right side panel (104). The left end of the first partition (g1) is connected to the left side panel (102) and is located between the first return air inlet (2) and the first supply air inlet (3). The right end of the first partition (g1) is connected to the right side panel (104) and is located between the exhaust air inlet (4) and the fresh air inlet (5). A filter assembly (17) is connected between the first partition (g1) and the rear side panel (103). The front side panel (101), the left side panel (102), the first partition (g1), and the right side panel (104) surround and form an exhaust zone (f2). The left side panel (102), the first return air inlet (2), the first supply air inlet (3), the first return air inlet (2), the first supply air inlet (3), the first supply air inlet (4), and the first supply air inlet (5) are connected to the rear side panel (103). A filter assembly (17) is connected between the first partition (g1) and the rear side panel (103). The front side panel (101), the left side panel (102), the first partition (g1), and the right side panel (104) surround and form an exhaust zone (f2). A partition (g1), a filter assembly (17), and a rear side plate (103) surround and form the air supply zone (f1). The high-pressure pipe (42) and the low-pressure pipe (53) extend out of the rear side plate (103). The first partition (g1), the filter assembly (17), the rear side plate (103), and the right side plate (104) surround and form a mixed air intake zone (f3) for both the fresh air inlet (5) and the second return air inlet (6). The second return air inlet (6) is located to the right of the filter assembly (17). The mixed air intake zone (f3) is also provided with a damper (18) located to the right of the second return air inlet (6). The damper (18) is connected between the first partition (g1) and the rear side plate (103).

5. A fresh air dehumidification device according to claim 4, characterized in that, An air supply fan (21) is installed and connected in the air supply zone (f1). The inlet of the air supply fan (21) is in the air supply zone (f1) and the outlet is connected to the air supply port (3). An exhaust fan (16) is installed and connected in the exhaust zone (f2). The inlet of the exhaust fan (16) is in the exhaust zone (f2) and the outlet is connected to the exhaust port (4).

6. The fresh air dehumidification device according to claim 2, characterized in that, A diamond-shaped total heat exchanger (19) is installed and connected inside the main unit.

7. A fresh air dehumidification device according to claim 6, characterized in that, The air supply vent (3) and air exhaust vent (4) are both located on the left side plate (102) and are arranged at intervals. The second return air vent (6), the first return air vent (2) and the fresh air vent (5) are both located on the right side plate (104) and are arranged at intervals.

8. A fresh air dehumidification device according to claim 7, characterized in that, The total heat exchanger (19) is located in the rear right position inside the main unit. A second partition (g2) is installed between the left side plate (102) and the total heat exchanger (19). The left end of the second partition (g2) is connected to the left side plate (102) and is located between the front and rear of the air supply port (3) and the air exhaust port (4). The right end of the second partition (g2) is connected to the left end of the total heat exchanger (19). A filter assembly (17) is connected between the front end of the total heat exchanger (19) and the front side plate (101). A third partition (g3) is connected between the rear end of the total heat exchanger (19) and the rear side plate (103). A fourth partition (g4) is connected between the right end of the total heat exchanger (19) and the right side plate (104). The right end of the fourth partition (g4) is connected to the fourth partition (g4) and is located between the front and rear of the first return air port (2) and the fresh air port (5).

9. A fresh air dehumidification device according to claim 8, characterized in that, The front side panel (101), left side panel (102), second partition (g2), left front outlet portion (191) of total heat exchanger (19) and filter assembly (17) surround to form an air supply zone (f1). The second partition (g2), left side panel (102), rear side panel (103), third partition (g3) and left rear outlet portion (192) of total heat exchanger (19) surround to form an exhaust zone (f2). The front side panel (101), filter assembly (17), right front inlet portion (193) of total heat exchanger (19), fourth partition (g4) and right side panel (104) surround to form a return air zone (f4). The fourth partition (g4), right rear inlet portion (194) of total heat exchanger (19), third partition (g3), rear side panel (103) and right side panel (104) surround to form a fresh air intake zone (f5).

10. A fresh air dehumidification device according to claim 9, characterized in that, The high-pressure pipe (42) and the low-pressure pipe (53) pass through the third partition (g3) and the rear side plate (103) and extend out of the rear side plate (103). A damper (18) is installed between the third partition (g3) and the fourth partition (g4) at the right rear inlet (194) of the fresh air inlet area (f5) near the total heat exchanger (19).

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