Miniature negative pressure drainage valve with middle exhaust function
By designing a miniature negative pressure drain valve with intermediate exhaust function, and utilizing aluminum alloy materials and a specific structure, the problem of difficult condensate drainage from the airborne evaporator was solved, achieving smooth condensate drainage and improved heat exchange capacity.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-14
- Publication Date
- 2026-03-31
AI Technical Summary
When the airborne evaporator is in a negative pressure environment, the condensate cannot be discharged in time, which causes water to be carried by the fan and condensate to accumulate on the evaporator shell, affecting the heat exchange capacity and causing safety hazards.
A miniature negative pressure drain valve with intermediate venting function is designed. It is made of aluminum alloy and uses gravity and negative pressure difference to achieve smooth discharge of condensate through the design of inlet, outlet and vent pipe. The sealing ring and pipe tapered thread connection ensure the airtightness.
It enables smooth discharge of condensate under negative pressure, avoids water carrying by the fan and water accumulation in the evaporator, improves heat exchange capacity and reduces weight and volume, and has the advantages of simple structure and energy saving.
Smart Images
Figure CN224064858U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of airborne evaporative cooling technology, and is used to solve the problem of difficult condensate drainage in airborne evaporators under negative pressure environment. In particular, it relates to a miniature negative pressure drain valve with intermediate exhaust function. Background Technology
[0002] The evaporator is one of the four essential components of an airborne evaporative cooling system. Utilizing evaporative refrigeration cycle technology, it cools the air passing through the evaporator core by the evaporation of refrigerant. A centrifugal fan then delivers the cooled air into the cabin, achieving the cooling purpose. To reduce the temperature and humidity of the cabin air, the evaporator must have sufficient cooling and dehumidification capacity. Due to the significant pressure difference across the evaporator core, a negative pressure chamber is formed in the air duct from the evaporator core to the blower, preventing condensate from draining into the drain pipe in a timely manner.
[0003] The impact of improper condensate drainage is mainly reflected in two aspects: First, some condensate is carried away by the fan, which can easily lead to water being carried into the fan's airflow; second, condensate accumulated inside the evaporator shell will weaken the evaporator's heat exchange capacity or flow into the cabin through gaps such as return air vents, posing a safety hazard to other electrical components on board. Common condensate drainage methods for refrigeration systems include gravity flow, water seal, and mechanical lifting. However, due to space constraints and power shortages on board, the evaporator cannot be too large, and these traditional methods cannot effectively solve the problem of difficult drainage of evaporator condensate under negative pressure conditions on aircraft. Utility Model Content
[0004] The purpose of this invention is to provide a miniature negative pressure drain valve with intermediate venting function to solve the problem of difficult condensate drainage in airborne evaporators under internal negative pressure. This invention features simple structure, smooth drainage, small size, light weight, and energy efficiency.
[0005] The technical solution is as follows: A miniature negative pressure drainage valve with intermediate venting function, characterized in that it includes a valve body, an inlet at the top port of the valve body, and an outwardly extending venting conduit at the top port; an end cap connected to the bottom of the valve body, a guide groove on the central axis of the end cap, the guide groove being slidably connected to the valve core, and an outlet around the guide groove; a valve seat is provided in the valve cavity of the valve body above the valve core; and the valve core is used to close / open the channel of the valve seat.
[0006] In the aforementioned miniature negative pressure drain valve with intermediate venting function, the venting duct is coaxially arranged with the valve body.
[0007] In the aforementioned miniature negative pressure drain valve with intermediate venting function, both the valve body and the outer periphery of the end cover are equipped with sealing rings.
[0008] In the aforementioned miniature negative pressure drainage valve with intermediate venting function, both the inlet and outlet are designed as flow guide holes.
[0009] In the aforementioned miniature negative pressure drain valve with intermediate venting function, the valve body and end cap are sealed together by a pipe tapered thread.
[0010] The aforementioned miniature negative pressure drainage valve with intermediate exhaust function is made entirely of aluminum alloy.
[0011] The technical advantages of this utility model are: it is installed inside the evaporator drain pipe and has the advantages of simple structure, smooth drainage, small size, light weight, energy saving and broad application prospects. It can effectively solve the problem of difficult discharge of condensate from air-mounted evaporators under negative pressure environment. Attached Figure Description
[0012] Figure 1 This is a drawing of the outline of the present utility model;
[0013] Figure 2 This is an exploded view of the present invention;
[0014] Figure 3 is an assembly drawing of this utility model; (a) is a sectional view of (b) AA, and (b) is a top view;
[0015] Figure 4 This is a schematic diagram of the operation of this utility model in the evaporator drain pipe. Detailed Implementation
[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments:
[0017] Example 1. A miniature negative pressure drain valve with intermediate venting function, see [link to example]. Figures 1-4 The valve body includes a valve body 1, with an inlet 2 at the top and an outwardly extending vent pipe 3 at the top. An end cap 4 is connected to the bottom of the valve body 1, and a guide groove 5 is provided on the central axis of the end cap 4. The guide groove 5 is slidably connected to the valve core 6, and an outlet 7 is provided around the guide groove 5. A valve seat 8 is provided inside the valve cavity of the valve body 1 above the valve core 6. The valve core 6 is used to close / open the passage of the valve seat 8. The valve core moves axially along the inner cavity of the valve body, guided by the guide groove 5 of the end cap, thereby controlling the opening and closing of the miniature negative pressure drain valve.
[0018] The exhaust pipe 3 and the water inlet are located on the valve body of the negative pressure drain valve. When the condensate flows down the water inlet by gravity, the air in the pipeline will create resistance. At this time, the air in the pipeline can be discharged through the exhaust pipe 3 to improve the smoothness.
[0019] The valve body has a cylindrical structure and can be directly inserted into the drain pipe. The exhaust port of the exhaust pipe 3 should be exposed above the condensate liquid surface, making installation and disassembly convenient.
[0020] The aforementioned exhaust duct 3 is coaxially arranged with the valve body 1.
[0021] Both the valve body 1 and the end cover 4 mentioned above are equipped with sealing rings 9.
[0022] The aforementioned inlet 2 and outlet 7 are both designed as flow guide holes. The design of the inlet and outlet 7 as flow guide holes can adjust the flow rate, control the flow direction of the medium, improve the flow uniformity, make the fluid flow around the flow path, reduce the unevenness of velocity, and make the flow more uniform.
[0023] The valve body 1 and the end cap 4 are connected by a pipe tapered thread for sealing.
[0024] The valve body and end cover are connected by a tapered thread to ensure the sealing inside the drain valve; O-rings are provided radially on the outer side of the valve body and end cover to ensure the sealing between the negative pressure drain valve and the connected drain pipe.
[0025] The aforementioned miniature negative pressure drain valve with intermediate venting function is entirely constructed of aluminum alloy. The valve is made of aluminum alloy, with an outer diameter of <12mm, an adjustable length based on the amount of condensate under negative pressure conditions, a weight of <10g, and a compact structure.
[0026] Install the valve in the drain pipe at the bottom of the evaporator, see [link / reference]. Figure 4 When there is negative pressure inside the evaporator, the valve core 6 and the valve seat 8 are sealed flat, preventing outside air from entering the evaporator under the action of negative pressure. The condensate is not affected by the negative pressure and enters the drain pipe in time under its own gravity. It accumulates at the upper end of the negative pressure drain valve. When the gravity generated by the height of the liquid column is greater than the negative pressure, the valve core 6 moves down and opens. The condensate passes through the valve seat 8 under its own gravity and is discharged through the outlet 7 of the end cover 3.
Claims
1. A micro negative pressure drainage valve with intermediate exhaust function, characterized in that, The utility model provides a valve body (1), the top port part of valve body (1) is equipped with water inlet (2), and the top port part is also equipped with the exhaust guide pipe (3) that extends outward, the bottom end of valve body (1) is connected with end cover (4), and the central axis of end cover (4) is equipped with guide slot (5), and guide slot (5) is slidably connected with valve core (6), and the periphery of guide slot (5) is equipped with water outlet (7), the valve cavity of valve body (1) above valve core (6) is equipped with valve seat (8), and valve core (6) is used to close / open the passageway of valve seat (8).
2. The micro negative pressure drainage valve with intermediate exhaust function according to claim 1, characterized in that, The exhaust guide pipe (3) is coaxially arranged with the valve body (1).
3. The micro negative pressure drain valve with intermediate exhaust function according to claim 1, characterized in that, The valve body (1) and the end cover (4) are both provided with a sealing ring (9) around the periphery.
4. The micro negative pressure drain valve with intermediate exhaust function according to claim 1, characterized in that, The water inlet (2) and the water outlet (7) are both designed as flow guide holes.
5. The micro negative pressure drain valve with intermediate exhaust function according to claim 1, characterized in that, The valve body (1) and the end cover (4) are sealingly connected through pipe taper threads.
6. The micro negative pressure drain valve with intermediate exhaust function according to claim 1, characterized in that, The whole is made of aluminum alloy.