Double-cold-source fresh air device

Abstract

The utility model relates to a double-cold-source fresh air device which comprises a machine shell, an isothermal dehumidification system, a filtering module and a humidification module are arranged in the machine shell, a first guide rail connected with the filtering module in a matched mode is arranged on the side, close to an air inlet, of an air supply duct, and the filtering module is selectively pulled out of the machine shell through the first guide rail. A second guide rail connected with the humidifying module in a matched mode is arranged on the side, close to the air outlet, of the air supply duct, and the humidifying module is selectively pulled out of the machine shell through the second guide rail. The machine shell is provided with an access hole opposite to the pulling-away direction of the filtering module and the humidifying module, and an access plate is detachably installed on the access hole. According to the double-cold-source fresh air device designed by the utility model, the filtering module and the humidifying module can be easily pulled and conveniently cleaned or replaced through modular design, a user can select different types of filters according to actual requirements, pollutants with various particle sizes in air can be effectively filtered, and the installation and maintenance processes are greatly simplified.

Description

Technical Field

[0001] The utility model relates to the technical field of dehumidification, in particular to a double-cold-source fresh air device. Background Art

[0002] In the prior art, with the improvement of people's living standards and the enhancement of environmental awareness, indoor air quality has received more and more attention. In order to improve the indoor air quality, fresh air systems are widely used in residences, office buildings, schools, hospitals and other places. Traditional fresh air systems mainly rely on the introduction of outdoor fresh air to dilute indoor pollutants, but there are the following limitations: First, traditional fresh air systems usually only perform simple filtering and ventilation, and cannot adjust the temperature and humidity of the introduced fresh air, especially in summer and winter, which will cause the indoor temperature to be too high or too low, affecting comfort. Secondly, in order to maintain a comfortable temperature and humidity indoors, it is necessary to use air conditioners and other equipment to adjust the fresh air, which will increase energy consumption and is not conducive to energy saving and environmental protection.

[0003] In order to overcome the limitations of traditional fresh air systems, dual cold source technology has been introduced into the fresh air system. Dual cold source technology refers to the use of two cold sources with different temperatures (such as cooling water and chilled water) to process fresh air, which can achieve precise control of fresh air temperature and humidity and improve energy efficiency.

[0004] However, the existing dual-cold source fresh air system still has room for improvement in terms of temperature and humidity control accuracy, energy efficiency, and user experience. For example, it does not have a humidification function, and the proportion of chilled water is not accurately controlled, resulting in large fluctuations in the supply air temperature and inability to achieve precise temperature control. Utility Model Content

[0005] In order to solve the above problems, the utility model provides a dual-cold source fresh air device which adopts a modular design and can be easily maintained and flexibly configured.

[0006] In order to achieve the above-mentioned purpose, the dual-cold source fresh air device designed by the utility model comprises a casing, the casing is provided with an air inlet and an air outlet, the air inlet and the air outlet are connected to form an air supply duct, the air supply duct is provided with a fan, and the casing is provided with an isothermal dehumidification system, a filter module and a humidification module, the isothermal dehumidification system is used for dehumidifying the air flowing through the air supply duct; a first guide rail connected to the filter module is provided on the side of the air supply duct close to the air inlet, and the filter module is selectively pulled out of the casing through the first guide rail; a second guide rail connected to the humidification module is provided on the side of the air supply duct close to the air outlet, and the humidification module is selectively pulled out of the casing through the second guide rail; the casing is provided with an inspection port opposite to the extraction direction of the filter module and the humidification module, and a inspection plate is detachably installed on the inspection port.

[0007] In order to facilitate cleaning, replacement or maintenance operations, the air inlet and the air outlet are arranged on opposite sides of the casing, and the extraction direction of the filter module and the humidification module is perpendicular to the air supply direction of the air supply duct.

[0008] In order to simply and effectively realize the disassembly of the module, the first guide rail includes an upper guide rail and a lower guide rail, and the upper guide rail and the lower guide rail are arranged in the air supply duct in a vertical direction; the second guide rail has the same structure as the first guide rail.

[0009] A further solution is that the upper guide rail and the lower guide rail each include two guide bars that are relatively spaced apart, and the cross section of the guide bar is L-shaped.

[0010] A further solution is that the filter module includes a filter element and a first fastener, and the filter element is fixedly mounted on the inspection plate by the first fastener.

[0011] A further solution is that the humidification module includes an outer frame slidably connected to the second guide rail, a wet membrane arranged in the outer frame, a second fastener and a water distribution pipe arranged in the outer frame, the water distribution pipe is located above the wet membrane, and the outer frame is fixedly mounted on the inspection plate by the second fastener.

[0012] A further solution is that the inspection panel includes a first sub-panel corresponding to the filter module and a second sub-panel corresponding to the humidification module.

[0013] In order to accurately adjust the supply air temperature and humidity, the isothermal dehumidification system includes a compressor, a plate heat exchanger and a liquid inlet pipe, and a coil heat exchanger, an evaporator and a condenser arranged in sequence in the supply air duct along the air supply direction; the output end of the compressor is connected to the plate heat exchanger in one way, and is connected to the condenser through a solenoid valve in the other way; the output end of the condenser is connected to a first electronic expansion valve, the output end of the plate heat exchanger is connected to a second electronic expansion valve, the output ends of the first electronic expansion valve and the second electronic expansion valve are mixed and connected to the input end of the evaporator, and the output end of the evaporator is connected to the input end of the compressor; one end of the liquid inlet pipe is connected to an external cooling water source, and the other end is connected to the water inlet end of the plate heat exchanger and the water inlet end of the coil heat exchanger through a water distribution pipe; the water outlet end of the plate heat exchanger is connected to a first liquid outlet pipe, the water outlet end of the coil heat exchanger is connected to a second liquid outlet pipe, and the first liquid outlet pipe and the second liquid outlet pipe are both provided with a proportional valve.

[0014] In order to optimize the component layout and make the device structure more compact, a middle partition is provided in the casing along the air supply direction, and the middle partition divides the internal space of the casing into the air supply duct and a working area independent of the air supply duct. The compressor, plate heat exchanger, liquid inlet pipe, first liquid outlet pipe, second liquid outlet pipe and proportional valve are all arranged in the working area.

[0015] In order to facilitate drainage and maintenance, a water receiving pan is also included. The water receiving pan is arranged below the humidification module, the plate heat exchanger, the coil heat exchanger, the evaporator and the condenser, and a drain pipe is arranged on the water receiving pan. The inspection panel is provided with a drain pipe, a liquid inlet pipe, a first liquid outlet pipe and a second liquid outlet pipe, which are matched with quick-release joints in a one-to-one manner.

[0016] The dual-cold source fresh air device designed by the utility model has a modular design, and the filter module and the humidification module can be easily pulled out, which is convenient for cleaning or replacement. Users can also choose different types of filters according to actual needs to achieve effective filtration of pollutants of various particle sizes in the air, greatly simplifying the installation and maintenance process. In addition, different from the extensive temperature and humidity adjustment method of the dual condensation dehumidification system in the related technology, the dual-way water outlet design and proportional valve are adopted to achieve independent and precise control of the plate heat exchanger and the coil heat exchanger, achieving a more precise control of the supply air temperature and humidity, and further improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a dual-cold-source fresh air device provided in an embodiment of the present application;

[0018] Figure 2 It is a schematic diagram of pulling out the filter module and the humidification module provided in the embodiment of the present application;

[0019] Figure 3 yes Figure 2 The enlarged schematic diagram at A in the middle;

[0020] Figure 4 yes Figure 1 A top view of

[0021] Figure 5 yes Figure 4 Sectional view at the middle BB;

[0022] Figure 6 yes Figure 4 Sectional view at CC;

[0023] Figure 7 It is a schematic diagram of the system structure of the isothermal dehumidification system provided in an embodiment of the present application.

[0024] Among them: casing 10, air inlet 11, return air outlet 11a, air outlet 12, air supply duct 13, fan 14, isothermal dehumidification system 20, proportional valve 20a, compressor 21, plate heat exchanger 22, first liquid outlet pipe 221, liquid inlet pipe 23, coil heat exchanger 24, second liquid outlet pipe 241, evaporator 25, condenser 26, solenoid valve 27, first electronic expansion valve 28, second electronic expansion valve 29, filter module 30, filter element 31, first fastener 32, humidification module 40, outer frame 41, wet film 42, second fastener 43, water distribution pipe 44, first guide rail 50, second guide rail 51, upper guide rail 52, lower guide rail 53, guide strip 54, inspection panel 60, first sub-panel 61, second sub-panel 62, middle partition 70, working area 71, water receiving tray 80, drain pipe 81, quick release connector 90. DETAILED DESCRIPTION

[0025] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0026] Example 1

[0027] like Figures 1 to 7 As shown, the dual cold source fresh air device described in this embodiment includes a housing 10, the housing 10 is provided with an air inlet 11 and an air outlet 12, the air inlet 11 and the air outlet 12 are connected to form an air supply duct 13, a fan 14 is arranged in the air supply duct 13, and an isothermal dehumidification system 20, a filtering module 30 and a humidification module 40 are arranged in the housing 10, and the isothermal dehumidification system 20 is used to dehumidify the air flowing through the air supply duct 13; the air supply duct 13 is close to the air inlet 11. A first guide rail 50 is provided on one side to be matched with the filter module 30, and the filter module 30 is selectively pulled out of the casing 10 through the first guide rail 50; a second guide rail 51 is provided on the side of the air supply duct 13 close to the air outlet 12 to be matched with the humidification module 40, and the humidification module 40 is selectively pulled out of the casing 10 through the second guide rail 51; an inspection port is provided on the casing 10 which is opposite to the withdrawal direction of the filter module 30 and the humidification module 40, and an inspection panel 60 is detachably installed on the inspection port.

[0028] In specific implementation, the housing 10 of the dual cold source fresh air device can be installed on the indoor wall or ceiling, and its air inlet 11 is connected to the outdoor to introduce fresh air through the fan 14; the air outlet 12 is connected to the indoor, and the processed air is sent into the indoor under the drive of the fan 14. In addition, in this embodiment, Figure 1As shown, a return air port 11a connected to the indoor room can also be set on the side where the air inlet 11 is located. The return air port 11a is connected to the air supply duct 13, so that part of the indoor air can be mixed with the outdoor fresh air and then enter the isothermal dehumidification system 20 for treatment. The main function of the isothermal dehumidification system 20 is to dehumidify the air flowing through the air supply duct 13, reduce the air humidity, prevent the room from being too humid, avoid mold growth, and avoid objects getting damp, thereby improving the indoor air quality and comfort. In the dehumidification process, the isothermal dehumidification system 20 can maintain the air temperature basically unchanged to avoid the air temperature being too low and affecting the comfort of the human body. The detailed structure and working principle of the isothermal dehumidification system 20 will be introduced in detail in the subsequent parts.

[0029] In addition, in the air supply duct 13, a filter module 30 is provided on the side close to the air inlet 11, and a humidification module 40 is provided on the side close to the air outlet 12, wherein the main function of the filter module 30 is to filter pollutants in the air, such as dust, PM2.5, pollen, bacteria, etc., to improve the cleanliness of the air delivered to the room; and the main function of the humidification module 40 is to increase the humidity of the air delivered to the room, especially in winter or dry areas, which can effectively improve the indoor comfort and prevent problems such as dry skin and respiratory discomfort caused by excessively dry air.

[0030] Specifically, both the filter module 30 and the humidification module 40 adopt a structure design that can be quickly pulled out and installed on the corresponding first guide rail 50 or second guide rail 51, which is convenient for users to maintain and replace. That is, through a separately set inspection port (not shown in the figure), the user only needs to open the inspection panel 60 on the inspection port to reveal the filter module 30 and the humidification module 40, and then the filter module 30 and the humidification module 40 can be easily pulled out from the housing 10 for the next cleaning, replacement or maintenance operation without disassembling the entire device, which greatly simplifies the maintenance process and saves the user's time and energy. For example, when it is necessary to replace the filter element in the filter module 30, the user only needs to open the inspection panel 60, pull out the filter module 30, replace different types of filter elements (such as primary filter, activated carbon filter, HEPA filter, etc.) according to actual needs, and then push the filter module 30 back to the first guide rail 50. The operation is very simple and quick.

[0031] In some embodiments, Figure 1As shown, the air inlet 11 and the air outlet 12 are arranged on opposite sides of the housing 10, and the extraction direction of the filter module 30 and the humidification module 40 is perpendicular to the air supply direction of the air supply duct 13. With this structural design, the filter module 30 and the humidification module 40 can be extracted in a direction perpendicular to the air supply direction, effectively avoiding interference with external components (such as pipes, elbows, etc.) that may be connected to the air inlet 11 and the air outlet 12, ensuring that the modules can be smoothly extracted and pushed back, providing users with a more convenient use experience.

[0032] In some embodiments, Figure 2 , Figure 3 and Figure 5 As shown, the first guide rail 50 includes an upper guide rail 52 and a lower guide rail 53, and the upper guide rail 52 and the lower guide rail 53 are arranged in the air supply duct 13 in an upper and lower direction; the second guide rail 51 has the same structure as the first guide rail 50. The synergistic effect of the upper guide rail 52 and the lower guide rail 53 can provide stable support for the filter module 30 and the humidification module 40, prevent the modules from shaking or tilting during the pulling process, and ensure that the modules can slide smoothly, which is a simple, effective and reliable module disassembly solution.

[0033] Specifically, the upper guide rail 52 and the lower guide rail 53 each include two guide bars 54 that are spaced apart from each other, and the cross section of the guide bar 54 is L-shaped. The L-shaped guide bar 54 has a simple structure and can be made of materials such as metal sheets and easily manufactured through processes such as bending or stamping, thereby reducing manufacturing costs. The L-shaped guide bar 54 can provide a larger contact area, making the filter module 30 and the humidification module 40 more stable after being fixed in position, thereby reducing possible shaking and noise when air passes through.

[0034] In some embodiments, Figure 2 and Figure 5 As shown, the filter module 30 includes a filter element 31 and a first fastener 32, and the filter element 31 is fixedly mounted on the access panel 60 by the first fastener 32. In specific implementation, considering that the replacement frequency of the filter element 31 is relatively high, in order to simplify the replacement operation of the filter element 31, the first fastener 32 is preferably a hand-tightened plum screw. When the user needs to replace the filter element 31, the filter module 30 is found, and then the first fastener 32 (such as a hand-tightened plum screw) is manually screwed to easily remove the filter element 31 from the access panel 60. After replacing the new filter element 31, the replacement operation can be completed by manually tightening the plum screw without using any tools, which is very convenient and quick.

[0035] In some embodiments, Figure 2 , Figure 5 and Figure 6As shown, the humidification module 40 includes an outer frame 41 slidably coupled to the second guide rail 51, a wet film 42 disposed in the outer frame 41, a second fastener 43, and a water distribution pipe 44 disposed in the outer frame 41, wherein the water distribution pipe 44 is located above the wet film 42, and the outer frame 41 is fixedly mounted on the inspection plate 60 by the second fastener 43.

[0036] In specific implementation, the user only needs to open the inspection port and loosen the second fastener 43 (such as a screw) to pull the entire humidification module 40 out of the housing 10 for easy cleaning, maintenance or replacement. At the same time, the water distribution pipe 44 in the humidification module 40 is connected to an external water source and evenly sprays water onto the wet film 42, wherein the wet film 42 is a material with good water absorption and air permeability, which can fully absorb the water sprayed by the water distribution pipe 44 and evenly distribute the water on the surface to form a larger evaporation area. When dry air flows through the wet film 42, the water on the surface of the wet film 42 will evaporate rapidly, thereby quickly increasing the humidity of the fresh air and achieving the purpose of humidification. This humidification method is highly efficient and fast in humidification, and can effectively increase the indoor air humidity and improve the comfort of the indoor environment.

[0037] In some embodiments, Figure 2 As shown, the access panel 60 includes a first sub-panel 61 corresponding to the filter module 30 and a second sub-panel 62 corresponding to the humidification module 40. With this structural design, when the access panel 60 is divided into the first sub-panel 61 and the second sub-panel 62 corresponding to the filter module 30 and the humidification module 40, the user can selectively open the corresponding sub-panel to perform maintenance operations as needed, such as replacing the filter element of the filter module 30 or cleaning the wet film of the humidification module 40, etc., without opening the entire access panel 60, thereby improving maintenance efficiency.

[0038] In some embodiments, Figure 4 and Figure 7As shown in FIG. 1 , the isothermal dehumidification system 20 includes a compressor 21, a plate heat exchanger 22, and a liquid inlet pipe 23, and a coil heat exchanger 24, an evaporator 25, and a condenser 26 sequentially arranged in the air supply duct 13 along the air supply direction; the output end of the compressor 21 is connected to the plate heat exchanger 22 in one way, and is connected to the condenser 26 through a solenoid valve 27 in the other way; the output end of the condenser 26 is connected to a first electronic expansion valve 28, and the output end of the plate heat exchanger 22 is connected to a second electronic expansion valve 29, and the first electronic expansion valve 28 and the second electronic expansion valve 29 are connected to each other. The output end of the expansion valve 29 is connected to the input end of the evaporator 25 after mixing, and the output end of the evaporator 25 is connected to the input end of the compressor 21; one end of the liquid inlet pipe 23 is connected to the external cooling water source, and the other end is connected to the water inlet end of the plate heat exchanger 22 and the water inlet end of the coil heat exchanger 24 through a water distribution pipe; the water outlet end of the plate heat exchanger 22 is connected to the first liquid outlet pipe 221, and the water outlet end of the coil heat exchanger 24 is connected to the second liquid outlet pipe 241, and the first liquid outlet pipe 221 and the second liquid outlet pipe 241 are both provided with a proportional valve 20a.

[0039] When working, illustratively:

[0040] First, the external cooling water source enters through the liquid inlet pipe 23 and is divided into two paths through the water distribution pipe, one of which enters the plate heat exchanger 22 and the other enters the coil heat exchanger 24. At this time, the compressor 21 starts to compress the refrigerant into a high-temperature and high-pressure gas. This high-temperature and high-pressure gas is divided into two paths, one of which directly enters the condenser 26. In the condenser 26, the refrigerant exchanges heat with the fresh air in the air supply duct 13 to release heat and condense into a medium-temperature and high-pressure liquid, and is throttled and reduced in pressure by the first electronic expansion valve 28; the other path enters the plate heat exchanger 22. In the plate heat exchanger 22, the refrigerant exchanges heat with the cooling water to release heat and is also converted into a medium-temperature and high-pressure liquid, and The second electronic expansion valve 29 is used to throttle and reduce the pressure, and then the two refrigerant paths are merged, that is, the two medium-temperature and high-pressure liquids after throttling and reducing the pressure by the expansion valve are merged at the entrance of the evaporator 25 and enter the evaporator 25. In the evaporator 25, the refrigerant absorbs the heat of the fresh air and evaporates into a low-temperature and low-pressure gas. At the same time, the water vapor in the fresh air condenses into dew when it is cold, thereby achieving a dehumidification effect. The fresh air after dehumidification and cooling continues to flow and enters the condenser 26, absorbing the heat released by the refrigerant and raising its temperature. Finally, the treated fresh air is delivered into the room by the fan 14 to ensure the stability of the indoor temperature and humidity, and the low-temperature and low-pressure gaseous refrigerant in the evaporator 25 is sucked into the compressor 21 to start the next cycle.

[0041] In this process, the first liquid outlet pipe 221 and the second liquid outlet pipe 241 are both provided with a proportional valve 20a, which can accurately adjust the valve opening, thereby realizing accurate control of the cooling water flow through the plate heat exchanger 22 and the coil heat exchanger 24. When the indoor temperature is too high, the proportional valve 20a on the first liquid outlet pipe 221 can be controlled to increase the opening, increase the cooling water flow through the plate heat exchanger 22, reduce the refrigerant temperature, and thus reduce the supply air temperature; and when the indoor humidity is too high, the proportional valve 20a on the second liquid outlet pipe 241 can be controlled to decrease the opening, reduce the cooling water flow through the coil heat exchanger 24, and increase the refrigerant temperature entering the evaporator 25, thereby enhancing the dehumidification effect.

[0042] By utilizing this structural design, the cooling water flow rate can be precisely controlled through the proportional valve 20a, thereby achieving more precise control of the supply air temperature and humidity, effectively improving the user experience. Precooling the fresh air through the coil heat exchanger 24 can reduce the dehumidification load of the evaporator 25, improve the energy efficiency of the system, and ensure efficient dehumidification effect.

[0043] In some embodiments, Figure 2 and Figure 4 As shown, a middle partition 70 is provided in the casing 10 along the air supply direction, and the middle partition 70 divides the internal space of the casing 10 into the air supply duct 13 and a working area 71 independent of the air supply duct 13, and the compressor 21, the plate heat exchanger 22, the liquid inlet pipe 23, the first liquid outlet pipe 221, the second liquid outlet pipe 241 and the proportional valve 20a are all arranged in the working area 71. In this way, the internal space of the casing 10 is divided into the air supply duct 13 and the working area 71 by the middle partition 70, and the compressor 21, the plate heat exchanger 22 and other components can be placed in the working area 71 to avoid occupying the space of the air supply duct 13, thereby improving the utilization rate of the internal space of the casing 10 and making the structure of the whole device more compact. Moreover, placing the compressor 21 and other components in the independent working area 71 can effectively isolate the noise and vibration generated by them and avoid direct transmission to the air supply duct 13, thereby reducing the noise level of the device and improving the user experience.

[0044] In some embodiments, Figure 2 , Figure 5 and Figure 6As shown, it also includes a water receiving pan 80, which is arranged below the humidification module 40, the plate heat exchanger 22, the coil heat exchanger 24, the evaporator 25 and the condenser 26, and a drain pipe 81 is arranged on the water receiving pan 80, and a quick-release joint 90 is arranged on the inspection plate 60, which is matched with the drain pipe 81, the liquid inlet pipe 23, the first liquid outlet pipe 221 and the second liquid outlet pipe 241. With this structure, the water receiving pan 80 is arranged below the humidification module 40, the plate heat exchanger 22, the coil heat exchanger 24, the evaporator 25 and the condenser 26, and is used to collect the condensed water generated by these components during the working process, and the water receiving pan 80 is connected with a drain pipe 81, and the condensed water can be conveniently discharged from the device through the drain pipe 81, so as to avoid the condensed water accumulating inside the device, causing water leakage or corrosion of components, and effectively ensure the long-term stable operation of the device. In addition, the use of the quick-release connector 90 simplifies the connection and disconnection operations of the pipe. For example, during the installation process, the user only needs to insert the pipe into the quick-release connector 90 to complete the connection, without the need to use tools for complex threaded connections or welding operations, thereby greatly shortening the installation time. At the same time, the connection method of the quick-release connector 90 is highly reliable and can effectively prevent water leakage, and the connection quality is uniform, thereby improving the overall reliability and stability of the device.

[0045] The dual-cold source fresh air device designed by the utility model has a modular design, and the filter module and the humidification module can be easily pulled out, which is convenient for cleaning or replacement. Users can also choose different types of filters according to actual needs to achieve effective filtration of pollutants of various particle sizes in the air, greatly simplifying the installation and maintenance process. In addition, different from the extensive temperature and humidity adjustment method of the dual condensation dehumidification system in the related technology, the dual-way water outlet design and proportional valve are adopted to achieve independent and precise control of the plate heat exchanger and the coil heat exchanger, achieving a more precise control of the supply air temperature and humidity, and further improving the user experience.

[0046] In the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0047] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A dual-cold source fresh air device, comprising a housing, wherein the housing is provided with an air inlet and an air outlet, wherein the air inlet and the air outlet are connected to form an air supply duct, wherein a fan is provided in the air supply duct, wherein: An isothermal dehumidification system, a filter module and a humidification module are arranged in the casing, and the isothermal dehumidification system is used for dehumidifying the air flowing through the air supply duct; a first guide rail matched with the filter module is arranged on the side of the air supply duct close to the air inlet, and the filter module is selectively withdrawn from the casing through the first guide rail; a second guide rail matched with the humidification module is arranged on the side of the air supply duct close to the air outlet, and the humidification module is selectively withdrawn from the casing through the second guide rail; an inspection port opposite to the withdrawal direction of the filter module and the humidification module is arranged on the casing, and an inspection plate is detachably installed on the inspection port.

2. The dual cold source fresh air device according to claim 1, characterized in that: The air inlet and the air outlet are arranged on opposite sides of the housing, and the extraction direction of the filter module and the humidification module is perpendicular to the air supply direction of the air supply duct.

3. The dual cold source fresh air device according to claim 1, characterized in that: The first guide rail includes an upper guide rail and a lower guide rail, and the upper guide rail and the lower guide rail are arranged in the air supply duct in a vertical direction relative to each other; the second guide rail has the same structure as the first guide rail.

4. The dual cold source fresh air device according to claim 3, characterized in that: The upper guide rail and the lower guide rail each include two guide bars that are spaced apart from each other, and the cross section of the guide bar is L-shaped.

5. The dual cold source fresh air device according to claim 3, characterized in that: The filter module comprises a filter element and a first fastener, and the filter element is fixedly mounted on the inspection plate by the first fastener.

6. The dual cold source fresh air device according to claim 3, characterized in that: The humidification module includes an outer frame slidably matched with the second guide rail, a wet film arranged in the outer frame, a second fastener and a water distribution pipe arranged in the outer frame, the water distribution pipe is located above the wet film, and the outer frame is fixedly mounted on the inspection plate by the second fastener.

7. The dual cold source fresh air device according to claim 5 or 6, characterized in that: The inspection panel includes a first sub-panel corresponding to the filter module and a second sub-panel corresponding to the humidification module.

8. The dual-cold-source fresh air device according to any one of claims 1 to 6, characterized in that: The isothermal dehumidification system includes a compressor, a plate heat exchanger and a liquid inlet pipe, as well as a coil heat exchanger, an evaporator and a condenser which are sequentially arranged in the air supply duct along the air supply direction; the output end of the compressor is connected to the plate heat exchanger in one way, and is connected to the condenser through a solenoid valve in the other way; the output end of the condenser is connected to a first electronic expansion valve, the output end of the plate heat exchanger is connected to a second electronic expansion valve, the output ends of the first electronic expansion valve and the second electronic expansion valve are mixed and connected to the input end of the evaporator, and the output end of the evaporator is connected to the input end of the compressor; one end of the liquid inlet pipe is used to connect to an external cooling water source, and the other end is connected to the water inlet end of the plate heat exchanger and the water inlet end of the coil heat exchanger through a water distribution pipe; the water outlet end of the plate heat exchanger is connected to a first liquid outlet pipe, the water outlet end of the coil heat exchanger is connected to a second liquid outlet pipe, and a proportional valve is provided on both the first liquid outlet pipe and the second liquid outlet pipe.

9. The dual cold source fresh air device according to claim 8, characterized in that: A middle partition is provided inside the casing along the air supply direction, and the middle partition divides the internal space of the casing into the air supply duct and a working area independent of the air supply duct. The compressor, plate heat exchanger, liquid inlet pipe, first liquid outlet pipe, second liquid outlet pipe and proportional valve are all arranged in the working area.

10. The dual cold source fresh air device according to claim 9, characterized in that: It also includes a water receiving pan, which is arranged below the humidification module, the plate heat exchanger, the coil heat exchanger, the evaporator and the condenser, and a drain pipe is arranged on the water receiving pan. The inspection plate is provided with quick-release joints that correspond one-to-one with the drain pipe, the liquid inlet pipe, the first liquid outlet pipe and the second liquid outlet pipe.

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