Heating, ventilation and air conditioning unit capable of preventing air leakage of pipeline, dehumidifier and air cabinet
By installing water traps and manual gate valves in HVAC units, the problem of air leakage in pipes was solved, system performance was optimized, energy loss was reduced, and the energy efficiency and reliability of the air conditioning units were improved.
Patent Information
- Application Number
- CN202520574696.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-31
- Publication Date
- 2026-03-06
- Estimated Expiration
- 2035-03-31
AI Technical Summary
Existing HVAC units often face the problem of air leakage in pipes during long-term operation, which affects system efficiency, increases energy consumption, and may lead to poor condensate drainage and equipment damage.
Install water traps and manual gate valves in HVAC units, especially at the drain outlets of the middle and rear cooling surfaces. Connect the drain pipes through the water traps and close the manual gate valves when necessary to prevent air leakage. Combine this with a drain pump to assist drainage and ensure smooth discharge of condensate.
It effectively prevents air leakage in the pipes when condensate is discharged, optimizes system performance, reduces energy loss, improves the overall energy efficiency of the air conditioning unit, and enhances the reliability and ease of maintenance of the system.
Smart Images
Figure CN223976163U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of HVAC unit technology, and in particular to an HVAC unit, dehumidifier and air handling unit for preventing air leakage in pipes. Background Technology
[0002] Heating, ventilation, and air conditioning systems play a vital role in modern buildings, not only regulating indoor temperature but also affecting indoor air quality and comfort.
[0003] In existing HVAC units using dehumidifiers and air handling units, surface coolers are commonly used to cool the air. Some HVAC units use a front surface cooler for both cooling and dehumidification, while a middle and rear surface cooler are used for temperature control and some dehumidification. The front surface cooler produces a large amount of condensate during dehumidification, while the middle and rear surface coolers produce a smaller amount. Current technology involves directly laying drainage pipes to drain this condensate locally. Since the middle and rear surface coolers produce less condensate, this can potentially cause air leakage within the HVAC unit due to the drainage pipes of the middle and rear surface coolers.
[0004] Traditional HVAC units often face the problem of air leakage in the ductwork during long-term operation. Air leakage not only affects system efficiency but may also lead to increased energy consumption, reduced air conditioning performance, and poor condensate drainage, resulting in additional maintenance costs and the risk of equipment damage.
[0005] Therefore, it is necessary to improve the existing technology. Utility Model Content
[0006] In the prior art, traditional HVAC units often face the problem of air leakage in the ducts during long-term operation. Therefore, this utility model provides an HVAC unit, dehumidifier and air handling unit to prevent air leakage in the ducts and solve the above problems.
[0007] In a first aspect, this utility model provides a heating, ventilation, and air conditioning unit for preventing air leakage in pipes, comprising, in sequence, a front surface cooler, a return air section, a middle surface cooler, a rear surface cooler, a fan, and a supply air section, wherein...
[0008] A first drain outlet is provided on the return air section, and a first water trap is provided on the first drain outlet. The first water trap is connected to the drain pipe.
[0009] A second drain outlet is provided between the middle surface cooler and the rear surface cooler. A second water trap is installed on the second drain outlet. A first manual gate valve is installed on the second water trap. The second water trap is connected to the drain pipe.
[0010] A third drain outlet is provided between the rear surface cooler and the fan. A third water trap is installed on the third drain outlet. A second manual gate valve is provided on the third water trap. The third water trap is connected to the drain pipe.
[0011] In one implementation, the HVAC unit further includes air filters disposed at the air inlet and air outlet of the HVAC unit.
[0012] In one implementation, the air filter includes a pre-filter disposed before the front surface cooler, a plate filter disposed before the middle surface cooler, and a medium-efficiency filter disposed after the rear surface cooler.
[0013] In one implementation, a drainage pump is installed on the drainage pipe, and the drainage pump is used to assist in drainage.
[0014] In one implementation, the diameter of the first water trap is larger than the diameters of the second and third water traps.
[0015] In one implementation, the diameter of the first water trap is 50mm, the diameter of the second water trap is 25mm, and the diameter of the third water trap is 32mm.
[0016] In one implementation, a cleaning port is provided on the first water trap, the cleaning port being used to clean impurities from the first water trap.
[0017] In one implementation, the pipes of the drain pipe are connected by flanges or threads, and sealing gaskets are installed at the connection points.
[0018] Secondly, the present invention also provides a dehumidifier, which includes the above-mentioned HVAC unit for preventing air leakage in pipes.
[0019] Thirdly, the present invention also provides an air handling unit, which includes the above-mentioned HVAC unit for preventing air leakage from pipes.
[0020] Beneficial effects: The HVAC unit, dehumidifier, and air handling unit provided by this utility model for preventing air leakage in pipes effectively prevent air leakage during condensate drainage by installing water traps on the front, middle, and rear surface cooling units, and manual gate valves on the middle and rear surface cooling units. The water traps and manual gate valves allow for pipe closure when necessary, maintaining pressure within the air conditioning unit and optimizing system performance. Preventing air leakage reduces energy loss in the system, improving the overall energy efficiency of the air conditioning unit. The manual gate valves facilitate pipe inspection and cleaning by maintenance personnel, enhancing system reliability and ease of maintenance. Attached Figure Description
[0021] Figure 1This is a structural schematic diagram of the dehumidifier of the HVAC unit that prevents air leakage from pipes, provided by this utility model.
[0022] Figure 2 This is a schematic diagram of the air handling unit of the HVAC unit with anti-air leakage in the pipes provided by this utility model;
[0023] The labels in the diagram are illustrated as follows:
[0024] 10. Front surface cooler; 11. First water trap; 20. Middle surface cooler; 21. Second water trap; 22. First manual gate valve; 30. Rear surface cooler; 31. Third water trap; 32. Second manual gate valve; 40. Fan; 50. Drain pipe; 60. Rotary dehumidification section.
[0025] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0026] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.
[0027] Those skilled in the art will understand that, unless specifically stated otherwise, the singular forms “a,” “an,” “the,” “the,” “the,” and “the” used herein may also include the plural forms. It should be further understood that the term “comprising” as used in this specification means the presence of the stated features, integers, steps, operations, elements, units, modules, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, units, modules, components, and / or groups thereof. It should be understood that when we say an element is “connected” or “coupled” to another element, it can be directly connected or coupled to the other element, or there may be intermediate elements. Furthermore, “connected” or “coupled” as used herein can include wireless connection or wireless coupling. The term “and / or” as used herein includes all or any units and all combinations of one or more associated listed items.
[0028] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as in the context of the prior art, and should not be interpreted in an idealized or overly formal sense unless specifically defined as herein.
[0029] Reference Figure 1 and Figure 2 , Figure 1This is a structural schematic diagram of the dehumidifier for HVAC units that prevent air leakage from pipes, as provided by this utility model. Figure 2 This is a schematic diagram of the air handling unit of the HVAC unit that prevents air leakage from pipes, provided by this utility model.
[0030] This utility model provides a heating, ventilation, and air conditioning unit (HVAC unit) for preventing air leakage in pipes, comprising a front surface cooler 10, a return air section, a middle surface cooler 20, a rear surface cooler 30, a fan 40, and a supply air section arranged sequentially. The return air section has a first drain outlet with a first water trap 11 connected to a drain pipe 50. A second drain outlet is located between the middle surface cooler 20 and the rear surface cooler 30, with a second water trap 21 installed and a first manual gate valve 22 connected to the drain pipe 50. A third drain outlet is located between the rear surface cooler 30 and the fan 40, with a third water trap 31 installed and a second manual gate valve 32 connected to the drain pipe 50. Figure 1 The dehumidifier also includes a rotary dehumidification section 60 located between the front surface cooler 10 and the middle surface cooler 20.
[0031] Among them, the surface cooler (or cooling coil) is a key component in HVAC systems used to reduce air temperature or humidity. It works by circulating refrigerant within cooling pipes, causing air temperature to drop as it passes through the surface cooler, and is commonly used for dehumidification or cooling. In this invention, the surface cooler is divided into a front surface cooler 10, a middle surface cooler 20, and a rear surface cooler 30, each playing a role in different stages of air handling. Specifically, the front surface cooler 10 is used for initial dehumidification and cooling, while the middle and rear surface coolers 20 and 30 are used for further temperature regulation and humidity control.
[0032] The return air section is part of the HVAC system, responsible for guiding indoor air back to the air conditioning system for further processing. In this invention, the return air section refers to the section that uses a fan 40 and ducts to return processed air (such as cooled, heated, or humidified air) to the air conditioning unit for further temperature and humidity control. A drain outlet is provided on the return air section to ensure that condensate can be discharged smoothly, avoiding any impact on airflow and system efficiency.
[0033] The air supply section is the part of a heating, ventilation, and air conditioning system responsible for returning treated air to the indoor environment. This section ensures that cooled, heated, or dehumidified air is delivered indoors as needed, providing a comfortable ambient temperature and humidity. In this invention, the air supply section includes a fan 40 and air supply ducts. The fan pressurizes and delivers air to the indoor areas, ensuring airflow and comfort.
[0034] Specifically, the first manual gate valve 22 is located downstream of the second water trap 21, and the second manual gate valve 32 is located downstream of the third water trap 31. During the dehumidification process, the front surface cooler 10 will produce a large amount of condensate. The first water trap 11 allows the front surface cooler 10 to continuously drain water through the first drain outlet and its associated drainage pipes. The middle surface cooler 20 produces a small amount of condensate during operation. This small amount of condensate can be stored through the second water trap 21 when the first manual gate valve 22 is closed. If the condensate produced by the middle surface cooler 20 accumulates to a certain amount, the first manual gate valve 22 can be opened to drain the condensate. After draining, the first manual gate valve 22 should be closed promptly. The rear surface cooler 30 operates in the same manner as the middle surface cooler 20. The middle surface cooler 20 and the rear surface cooler 30 actually only have a small amount of condensate. Therefore, the middle surface cooler 20 and the rear surface cooler 30 need to be equipped with a first manual gate valve 22 and a second manual gate valve 32. The condensate in the middle surface cooler 20 and the rear surface cooler 30 can be drained by opening the first manual gate valve 22 and the second manual gate valve 32 installed on the drain pipe. Closing them can prevent the leakage of circulating air in the HVAC unit.
[0035] The middle surface cooler 20 and the rear surface cooler 30 are interconnected by pipes. Since they generate relatively little condensate during operation, second and third water traps 21 and 31 are needed to ensure smooth drainage. First and second manual gate valves 22 are installed on the two water traps respectively to control condensate discharge. The manual gate valves provide maintenance personnel with a convenient drainage control method, ensuring timely condensate discharge while preventing air leakage during the drainage process.
[0036] This invention significantly improves the sealing performance of the system and reduces energy efficiency reduction caused by air leakage at pipe connections by setting first, second and third drain outlets in the return air section, between the middle surface cooler and the rear surface cooler, and between the rear surface cooler and the fan, and installing water traps in each drain outlet.
[0037] It should be noted that the diameter of the first water trap 11 is larger than the diameters of the second water trap 21 and the third water trap 31. Because continuous drainage is required, the first water trap 11 is designed with a larger diameter to provide greater drainage capacity and a larger water trap volume. The diameters of the first water trap 11, second water trap 21, and third water trap 31 can be 20mm, 25mm, 32mm, 40mm, 50mm, etc., with a thickness ranging from 2mm to 5mm. The preferred materials are PVC or ABS. Specifically, the drain outlet of the first water trap 10 is located at the lowest point of the pipe, at the bottom of the return air section, to receive the condensate from the front surface cooling system. Its diameter is 50mm to handle situations with large condensate volumes. The diameter of the second water trap 21 is 25mm, and the diameter of the third water trap 31 is 32mm.
[0038] Specifically, the HVAC unit also includes air filters installed at the air inlet and outlet of the HVAC unit. By installing high-efficiency air filters at the air inlet and outlet, dust and impurities can be prevented from entering the system, thereby reducing the risk of air leakage. Furthermore, in the dehumidifier, the air filters include a pre-filter installed before the front surface cooler, a plate filter installed before the middle surface cooler, and a medium-efficiency filter installed after the rear surface cooler.
[0039] In other implementations, a drainage pump (not shown in the figure) is installed on the drain pipe 50. The drainage pump assists drainage, ensuring unobstructed flow in situations where gravity drainage is difficult. Preferably, the drain pipe 50 is sloped to ensure that water flows smoothly to the drain outlet by gravity. The drain pipe 50 passes through the return air section, the middle surface cooler 20, the rear surface cooler 30, and the fan section, ultimately discharging condensate from the system. To ensure smooth and leak-free drainage, all connections are precisely designed using water traps and manual gate valves. The design of the drain pipe 50 not only ensures efficient condensate drainage but also effectively avoids energy loss due to air leakage at pipe connections. Preferably, the pipes of the drain pipe 50 are connected by flanges or threads, with sealing gaskets installed at the connections to ensure airtightness and prevent air leakage.
[0040] In other implementations, a cleaning port (not shown in the figure) can also be provided on the first water trap 11. The cleaning port is used to clean impurities from the first water trap 11. The cleaning port is a removable cover or a spiral cover for easy and quick opening and cleaning. Providing a cleaning port on the first water trap 11 facilitates the removal of impurities from the water trap, thereby reducing drainage problems and air leakage caused by impurity accumulation, and improving the ease of maintenance and operational stability of the equipment.
[0041] In summary, the HVAC unit, dehumidifier, and air handling unit provided by this utility model for preventing air leakage in pipes effectively prevent air leakage during condensate drainage by installing water traps on the front surface cooler 10, middle surface cooler 20, and rear surface cooler 30, and by installing manual gate valves on the water traps of the middle surface cooler 20 and rear surface cooler 30. The water traps and manual gate valves allow for pipe closure when necessary, maintaining pressure within the air conditioning unit and optimizing system performance. Preventing air leakage reduces energy loss in the system, improving the overall energy efficiency of the air conditioning unit. The manual gate valves facilitate pipe inspection and cleaning by maintenance personnel, enhancing system reliability and ease of maintenance.
[0042] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural or procedural transformations made based on the content of the present utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present utility model.
Claims
1. A heating, ventilation, and air conditioning unit for preventing air leakage in pipes, characterized in that, The air conditioning unit comprises a front surface cooling section, a return air section, a middle surface cooling section, a rear surface cooling section, a fan and a supply air section arranged in sequence. The return air section is provided with a first drain opening, and the first drain opening is provided with a first water trap connected to a drain pipe. A second drain opening is arranged between the middle surface cooling section and the rear surface cooling section, and the second drain opening is provided with a second water trap, and the second water trap is provided with a first manual gate valve and is connected to the drain pipe. A third drain opening is arranged between the rear surface cooling section and the fan, and the third drain opening is provided with a third water trap, and the third water trap is provided with a second manual gate valve and is connected to the drain pipe.
2. The air conditioning unit of claim 1, wherein, The air conditioning unit further comprises air filters arranged at the air inlet and the air outlet of the air conditioning unit.
3. The air conditioning unit of claim 2, wherein, The air filters comprise a prefilter arranged in front of the front surface cooling section, a panel filter arranged in front of the middle surface cooling section, and a medium filter arranged behind the rear surface cooling section.
4. The air conditioning and heating unit of claim 1, wherein The drain pipe is provided with a drain pump for assisting in drainage.
5. The air conditioning and heating unit of claim 1, wherein The diameter of the first water trap is greater than the diameters of the second water trap and the third water trap.
6. The air conditioning and heating unit of claim 5, wherein, The diameter of the first water trap is 50mm, the diameter of the second water trap is 25mm, and the diameter of the third water trap is 32mm.
7. The air conditioning and heating unit of claim 1, wherein The first water trap is provided with a cleaning opening for cleaning impurities on the first water trap.
8. The air conditioning and heating unit of claim 1, wherein, The drain pipe is connected by flanges or threads between the pipes, and sealing gaskets are added at the connection positions.
9. A dehumidifier, characterized by The air conditioning unit for preventing air leakage of the pipeline according to any one of claims 1-8.
10. A wind cabinet characterized in that, The air conditioning unit for preventing air leakage of the pipeline according to any one of claims 1-8.