A multi-way connection device for controlling room temperature

Abstract

A multi-way flow control device for HVAC pipes includes a multi-way, which is H-shaped and includes a connected inlet chamber, a steady flow chamber and a baffle chamber. A temperature control valve core is provided at one end of the inlet chamber, and a temperature control head is installed at the temperature control valve core. A flow valve core is provided at one end of the steady flow chamber. A partition with a through-flow port is built into the baffle chamber, which divides the baffle chamber into an exhaust chamber and a sewage chamber. The sewage chamber and the inlet chamber are connected through an internal inlet port, and the exhaust chamber and the steady flow chamber are connected through an internal outlet port. An exhaust assembly is connected to the top of the exhaust chamber. The present invention integrates a flow valve, an exhaust assembly and a temperature control head on a special-shaped multi-way, respectively achieving multiple purposes of achieving stable flow, automatic exhaust and controlling fluid flow by sensing ambient temperature feedback. The exhaust assembly is arranged at the highest point of the multi-way, has automatic and manual exhaust functions, and can volatilize and release the water accumulated during exhaust through the liquid wick.

Description

Technical Field

[0001] The present invention relates to the field of heating and ventilation, and in particular to a multi-way connection device for controlling room temperature, wherein a special-shaped multi-way is provided on which an exhaust component, a flow valve and a temperature control head are respectively provided to respectively achieve multiple purposes of automatic exhaust, stabilizing flow under pressure fluctuations and controlling fluid flow by sensing ambient temperature feedback. Background Art

[0002] Floor heating is the abbreviation of floor radiation heating. It uses the entire floor as a radiator and evenly heats the entire floor through the heat medium in the floor radiation layer. It utilizes the ground's own heat storage and the law of upward radiation to conduct heat from bottom to top to achieve the purpose of heating.

[0003] The most commonly used HVAC fluid in floor heating is water, which is often called water floor heating. Water is heated to a certain temperature and then transported to the water pipe heat dissipation network under the floor. The water medium flowing in the water floor heating is generally not higher than 60°C. It is a heating method that achieves the purpose of heating by heating the floor. The low-temperature ground heat medium forms a gradually decreasing temperature gradient from the soles of the feet to the head in the room, giving people a comfortable feeling of warm feet and cool head. Floor radiation heating conforms to the fitness theory of traditional Chinese medicine that warm feet and cool head. It is currently the most comfortable heating method and a symbol of modern quality of life.

[0004] There are generally devices for controlling fluid flow in HVAC systems, such as the thermostatic head used in the mainstream, which uses a built-in temperature sensing device to obtain the ambient temperature, and feedback controls the opening of the valve core to change the fluid flow, thereby achieving the purpose of reversely regulating the ambient temperature. The thermostatic head is divided into two types: electronic thermostat (electric actuator) and non-electric thermostatic head. Among them, the electronic thermostat has a more complex structure, small thrust, high average failure rate, and high technical requirements for on-site maintenance personnel. Therefore, non-electric thermostatic heads have gradually become the mainstream. They have built-in temperature sensing devices such as temperature sensing packages. The thermostatic head is installed on a multi-way for controlling the flow, and the multi-way valve core top contacts the output component of the temperature sensing package. The temperature sensing package senses environmental changes and generates external displacement output. The output acts on the valve core to achieve the purpose of changing the multi-way opening, such as the temperature control head disclosed in application number CN104514913B.

[0005] It is true that the existing temperature control head has the function of controlling the multi-port opening by feedback through sensing stability, but the ideal flow control effect cannot be achieved by only controlling the multi-port opening by sensing the ambient temperature feedback. The main reason is the influence of the pressure fluctuation of the fluid and the gas accumulation factors in the system.

[0006] The fluid flows at a given rate under pressure. When the power source and / or gas accumulation increase the system pressure, once the flow rate fluctuation of the fluid deviates greatly from the theoretical value, the fluid flow control will be unstable and there will be a lot of noise.

[0007] In the actual installation process of floor heating, due to the installation operation of the installers and the unevenness of the bottom surface, it is impossible to ensure that all floor heating pipes are on the same horizontal plane. The manifolds and main supply and return pipes installed on them are generally higher than the floor heating pipes, and these nodes are prone to gas collection. In addition, the temperature of the fluid in the HVAC is high, and it is easy to evaporate and accumulate at high points in the system, which will occupy a certain flow channel of the fluid and increase the pressure in the system. Once air enters the floor heating pipeline, it will cause gas blockage, resulting in non-circulation of the pipeline and affecting normal heating.

[0008] Based on the above reasons, current technology, on the one hand, adds a flow valve in the system. The function of the flow valve is to adjust the flow by adjusting the throttling area between the valve core and the multi-way and the local resistance it produces when the pressure difference between the inlet and outlet of the valve changes, thereby controlling the movement speed of the actuator and maintaining a constant flow rate. On the other hand, an automatic exhaust valve is set at the highest point of the system to discharge the accumulated gas to the outside to maintain a stable pressure in the system.

[0009] However, currently the temperature control head is installed on a multi-way, and is independently set up with the automatic exhaust valve and the flow valve, and the system integration is low. The present invention designs a multi-way with a multi-connection head, on which the temperature control head, the flow valve and the exhaust component are respectively connected to form a multi-way device, and the exhaust component is set on the top of the multi-way and facing upward. The present invention is installed on the HVAC system to smooth the instantaneous flow fluctuation, control the fluid flow according to the ambient temperature feedback, and automatically exhaust. Summary of the invention

[0010] According to the problem raised in the background technology, the present invention provides a multi-way connection device for controlling room temperature to solve the problem. The present invention will be further explained below.

[0011] A multi-pass flow control device for a HVAC pipeline, comprising a multi-pass as an installation body, the multi-pass is H-shaped, and includes a connected inlet chamber, a steady flow chamber and a baffle chamber, one end of the inlet chamber is provided with a temperature control valve core, and a temperature control head is installed at the temperature control valve core, and a flow valve core is provided at one end of the steady flow chamber; a partition with a through-flow opening is built into the baffle chamber, and the baffle chamber is divided into an exhaust chamber and a sewage chamber, the sewage chamber and the inlet chamber are connected through an inner inlet, the exhaust chamber and the steady flow chamber are connected through an inner outlet, and the top of the exhaust chamber is connected with an exhaust assembly;

[0012] The flow path of the multi-channel internal fluid is: it enters the inlet chamber from one end of the inlet chamber connected to the system pipeline, then flows through the internal inlet port to enter the sewage chamber of the deflection chamber, then flows through the flow port to enter the exhaust chamber, then flows through the internal outlet port to enter the steady flow chamber, and finally flows out from one end of the steady flow chamber connected to the system pipeline.

[0013] Furthermore, the sewage discharge chamber of the deflector chamber is downwardly connected to a sewage discharge valve for sewage discharge.

[0014] Furthermore, the exhaust assembly includes a cylinder connected to the multi-way, an exhaust cap is connected to the top of the cylinder, a radially protruding wrench position is integrally arranged on the cylinder, the bottom is built into the multi-way and a step surface is formed radially inwardly at the bottom, and a sliding sleeve is coaxially provided; an air hole is provided on the side wall of the bottom of the cylinder, an air nozzle is provided on the exhaust cap, and the air hole and the air nozzle constitute an air passage for exhausting air outward; a float is connected to the bottom of the sliding sleeve, and the float is immersed in the fluid.

[0015] Principle of automatic exhaust: the fluid generates an upward buoyancy on the float. When no gas is accumulated at the top of the exhaust chamber or the pressure of the accumulated gas does not reach a set value, the buoyancy will press the sleeve tightly against the bottom of the cylinder, closing the air hole and blocking the exhaust passage. When the pressure of the accumulated gas gradually increases, the fluid height in the exhaust chamber gradually decreases, the float gradually exposes the fluid surface and descends as the liquid level drops. After reaching the set value, the sleeve exposes the air hole and opens the exhaust passage.

[0016] Furthermore, an eccentric axially protruding guide protrusion is integrally provided at the bottom of the cylinder, and the guide protrusion passes through the through hole provided on the sliding sleeve, and a limiter is connected to the guide protrusion. The sliding sleeve is coaxially matched with the cylinder, and a constant pressure port is also provided at the through hole provided on the sliding sleeve. The eccentric guide protrusion guides the sliding sleeve and eliminates the degree of freedom of rotation. The limiter is intended to prevent the sliding sleeve from being out of cooperation with the cylinder, and the constant pressure port is intended to eliminate the obstruction of the pressure difference on the sliding sleeve.

[0017] Furthermore, the exhaust assembly also includes a liquid wick, which includes an absorbent pad, a volatilizing portion and a guide portion that are integrally connected, wherein the absorbent pad is attached to the bottom of the cylinder, and the volatilizing portion is wrapped outside the air nozzle. The liquid wick transfers fluid molecules along the guide portion to the volatilizing portion through the intermolecular gravitational force, and diffuses outward through the volatilizing portion in direct contact with the external environment.

[0018] Furthermore, the air nozzle is a detachable component, and a clearance groove is provided on the exhaust cap at the connection with the air nozzle, and the clearance groove is used for routing the liquid wick, and the air nozzle has a rough outer surface. The detachable setting of the air nozzle is convenient for assembly, and the rough surface is intended to increase the friction with the volatile part, which is conducive to fastening and preventing falling off.

[0019] Furthermore, the inner wall of the cylinder is provided with a wire groove along the axial direction, and the wire groove is used for the routing of the guide part; a core pressing piece is built into the cylinder, and the core pressing piece includes an integrated pressure pad part and a wire pressing part, and the pressure pad part is pressed tightly on the absorption pad part of the absorbent core, and a through hole is provided on the pressure pad part; the wire pressing part cooperates with the wire groove to press the guide part tightly on the groove wall of the wire groove. The core pressing piece is intended to stabilize the shape of the absorbent core to prevent it from curling or dislocation.

[0020] Furthermore, a pressure rod is movably provided on the exhaust cap, and a push rod is provided at the bottom of the pressure rod in contact with the pressure rod. The push rod sequentially penetrates the pressure pad part of the pressure core, the absorption pad part of the absorbent core and the cylinder body and then touches the sliding sleeve. By changing the axial displacement of the pressure rod, the air hole can be opened to realize gas discharge.

[0021] Furthermore, the pressure rod is threadedly connected to the exhaust cap, and a top block is connected to the bottom of the pressure rod. A return spring sleeved outside the pressure rod is arranged between the top block and the pressure pad of the pressure core. The height of the top block can be changed by rotating the pressure rod, and the height of the sliding sleeve can be changed. The self-locking of the thread allows the compressed return spring to always provide elastic force, and the elastic force presses the pressure pad tightly against the absorption pad.

[0022] Furthermore, the top block is integrally connected with a pressure arm, which radially abuts against the wire pressing part of the pressure core. At this time, the pressure rod is pivotally connected to the top block, that is, the top block has a rotational freedom, and the wire pressing part is provided with an axially directed guide groove, and the pressure arm fits in the guide groove. This is to prevent the absorbent core from being dislocated from the wire passing groove under the action of expansion. When the pressure rod is rotated, the rotation torque cannot drive the pressure arm to rotate, and the guide groove also provides a guiding function.

[0023] Beneficial effects: Compared with the prior art, the present invention integrates the flow valve, exhaust assembly and temperature control head on a special-shaped multi-way, which improves the integration and achieves multiple purposes of stabilizing the flow under pressure fluctuations, automatically exhausting and controlling the fluid flow by sensing the ambient temperature feedback. Among them, the exhaust assembly is set at the highest point of the multi-way, and the exhaust efficiency is the highest. At the same time, the exhaust assembly has both automatic and manual exhaust functions, and can volatilize and release the water accumulated during exhaust through the liquid wick. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 : A structural schematic diagram of the present invention;

[0025] Figure 2 : Schematic diagram of multi-pass structure;

[0026] Figure 3 : Cross-sectional view of multi-pass structure;

[0027] Figure 4 : Cross-sectional view of the internal structure of the steady flow chamber;

[0028] Figure 5 : Schematic diagram of exhaust assembly structure;

[0029] Figure 6 : Top view of the inner cavity of the cylinder.

[0030] In the figure: multi-way 1, flow inlet chamber 2, flow stabilizing chamber 3, deflection chamber 4, temperature control head 5, flow valve core 6, partition 7, flow port 701, exhaust chamber 401, sewage chamber 402, internal inlet 8, internal outlet 9, exhaust assembly 10, cylinder 11, exhaust cap 12, wrench position 13, step surface 14, sleeve 15, air hole 16, float 17, guide protrusion 18, limiter 19, constant pressure port 20, liquid absorbent core 21, absorption pad part 22, volatilization part 23, guide part 24, wire groove 25, core pressing part 26, pressure pad part 27, wire pressing part 28, through hole 29, pressure rod 30, push rod 31, push block 32, reset spring 33, pressure arm 34, guide groove 35. DETAILED DESCRIPTION

[0031] Next, combine with Figure 1-6 A specific embodiment of the present invention is described in detail.

[0032] Reference Figure 1-3 A multi-channel flow control device for a HVAC pipeline includes a multi-channel 1 as an installation body, the multi-channel 1 is H-shaped, and includes a connected inlet chamber 2, a stabilizing chamber 3 and a deflecting chamber 4. The central axes of the inlet chamber 2 and the stabilizing chamber 3 are arranged horizontally and parallel, while the deflecting chamber 4 is arranged longitudinally.

[0033] One end of the inlet chamber 2 is connected to the pipeline of the HVAC system as a pipeline connection end, and the water fluid in the system enters the inlet chamber from this connection end. The other end is used as an installation end and a temperature control valve core is provided. A temperature control head 5 is installed at the temperature control valve core. The temperature sensing device output of the temperature control head abuts against the valve stem of the temperature control valve core. The temperature sensing device converts the ambient temperature change into a displacement output. The displacement output is synchronously reflected on the valve stem, and then the flow area at the flow port changes, thereby achieving the purpose of controlling the fluid flow rate based on temperature feedback.

[0034] Reference Figure 4 One end of the flow stabilizing chamber 3 is also used as a pipeline connection end to be connected to the pipeline of the HVAC system. The fluid in the device flows back to the system pipeline through this connection end. The other end is used as an installation end to install the flow valve core 6. The flow valve core is designed to adjust the flow rate by adjusting the throttling port area between the valve core and the multi-pass and the local resistance generated by it when the pressure difference changes, so as to maintain the constant flow rate. The flow valve is a conventional technical means and will not be further elaborated in this embodiment.

[0035] Reference Figure 2-3The baffle chamber 4 is connected to the inlet chamber 2 and the steady flow chamber 3, and is built with a partition 7 with a through-flow port 701. The partition 7 is integrally formed with the multi-channel 1 shell, and is intended to divide the baffle chamber 4 into an exhaust chamber 401 and a sewage chamber 402 connected through the through-flow port 701. The multi-channel 1 is provided with an inner inlet 8 connecting the sewage chamber 402 and the inlet chamber 2, and an inner outlet 9 connecting the exhaust chamber 401 and the steady flow chamber 3. The multi-channel 1 at the top of the exhaust chamber 401 is equipped with an exhaust assembly 10, which can automatically discharge the gas accumulated at the top of the inlet chamber to the outside to reduce the pressure in the pipeline.

[0036] Based on the multi-pass structural design, the flow path of the fluid in the device is: it enters the inlet chamber from one end of the system pipeline connected to the inlet chamber 2, and then flows through the internal inlet port 8 to enter the sewage chamber 402 of the deflection chamber 4, and then flows through the flow port 701 to enter the exhaust chamber 401 of the deflection chamber 4, and then flows through the internal outlet port 9 to enter the steady flow chamber 3, and finally flows out from one end of the steady flow chamber 3 connected to the system pipeline.

[0037] It can be seen that the multi-way of the present invention includes at least five connection ends, which are connected to the system pipelines, respectively for water inlet and outlet, and for installing the thermostatic head 5, the flow valve core 6 and the exhaust assembly 10. In order to achieve exhaust, the device of the present invention is generally installed at the high point of the system, and the floor heating pipelines are all located below the floor. The device of the present invention is set to be exposed above the floor. The present invention is preferably suspended, so that a sewage valve for sewage discharge can be connected to the bottom of the device, or an openable sewage outlet can be directly set. In this case, the multi-way of the present invention is six-way.

[0038] It should be noted that the multi-way described in the present invention refers to the number of connection ends, and after being connected to the HVAC system, the device only has two external ports for inlet and outlet of fluid. The multi-way of the present invention is a special-shaped part, which can actually be understood as the multi-way wall of the flow stabilization chamber 3 can be used as the multi-way of the flow valve, and the flow valve core here constitutes a flow valve. Similarly, the multi-way wall of the inlet chamber 2 can be understood as the multi-way of the temperature control valve, and the temperature control valve core constitutes a temperature control valve.

[0039] After the present invention is installed in the HVAC system, the multi-pass 1 is horizontally arranged, that is, the inlet chamber and the steady flow chamber are at the same height, and the exhaust assembly 10 is vertically arranged at the top of the exhaust chamber 401, which is at the highest point of the system and is the gas accumulation point in the system, and is easy to release the gas in the system to the outside. At the same time, considering the high temperature of the fluid in the multi-pass, the multi-pass can be regarded as a heat source node in the system, radiating heat outward to form a thermal field. The temperature sensing device built into the temperature control head is far away from the multi-pass, and the displacement output component can be extended and arranged, and the temperature sensing device is arranged outside the thermal field to ensure that the temperature device senses the actual temperature of the environment.

[0040] The exhaust assembly 10 is arranged before the flow valve because the fluid in the baffle chamber 4 flows upward and the exhaust chamber 401 is at the top of the device. After the fluid enters, the bubbles contained therein float upward under buoyancy, consistent with the fluid flow direction, break at the top of the fluid and accumulate at the top of the exhaust chamber. The device is the high point of the HVAC system, and the top of the exhaust chamber serves as a dead zone for gas accumulation. The exhaust assembly in the present invention is arranged at the top of the exhaust chamber, the purpose of which is to automatically discharge the gas in the dead zone to the outside, reduce the pressure of the system, and reduce the gas content in the fluid flowing through the inlet chamber to a negligible value before entering the baffle chamber and subsequent pipelines.

[0041] Reference Figure 5-6 The exhaust assembly 5 includes a barrel 11 as a main body, which is threadedly connected to the multi-way 1, and an exhaust cap 12 is also threadedly connected to the top of the barrel. A radially protruding wrench position 13 is integrally provided on the barrel 11, and the wrench position can be a regular hexagon, which is used for the wrench to twist the threaded connection. The wrench position divides the thread provided on the barrel into two sections on the upper and lower sides, which are used to connect the multi-way 1 and the exhaust cap 12 respectively.

[0042] The bottom of the cylinder 11 is built into the multi-pass 1, and a step surface 14 is formed radially inwardly at the bottom, and a sliding sleeve 15 is coaxially sleeved. Through the setting of the step surface, the whole after the sliding sleeve is sleeved can be downwardly installed on the multi-pass; an air hole 16 is opened on the side wall of the bottom of the cylinder 11, and an air nozzle 16 is set on the exhaust cap 12. The air hole and the air nozzle constitute an air channel for exhausting air outwards; a float 17 is connected to the bottom of the sliding sleeve 15, and the float is immersed in the fluid.

[0043] The fluid generates an upward buoyancy on the float. When no gas is accumulated at the top of the exhaust chamber or the pressure of the accumulated gas does not reach a predetermined value, the buoyancy presses the sleeve tightly against the bottom of the cylinder, closing the air hole and blocking the exhaust passage. When the pressure of the accumulated gas gradually increases, the fluid height in the exhaust chamber gradually decreases, the float gradually emerges from the fluid surface and descends as the liquid level decreases. When it reaches a predetermined value, the sleeve exposes the air hole and opens the exhaust passage.

[0044] An eccentric axially protruding guide protrusion 18 is integrally provided at the bottom of the cylinder 11, and the guide protrusion passes through the through hole provided on the sliding sleeve 15. The cooperation between the eccentric guide protrusion 18 and the through hole guides the lifting and sliding of the sliding sleeve 15 and eliminates the rotational freedom of the sliding sleeve. A limit member 19 is connected to the guide protrusion 18, and the limit member can be a nut, aiming to limit the stroke of the sliding sleeve and prevent the sliding sleeve from being out of fit with the cylinder.

[0045] The sleeve 15 is coaxially matched with the cylinder 11. During the movement of the sleeve, there is a cavity space with dynamically changing volume between the sleeve and the bottom of the cylinder. In order to eliminate the resistance effect of the pressure difference on the sleeve, this embodiment further provides a constant pressure port 20 at the through hole provided on the sleeve 15, and the constant pressure port is preferably connected to the through hole.

[0046] The gas accumulated in the exhaust chamber 205 has a certain pressure under the action of the fluid pressure, and when the air hole 16 is opened, it can quickly enter the cylinder under the pressure difference and be discharged to the outside. According to common sense, the source of the accumulated gas is mainly the volatilization of the fluid, and the fluid is medium water, which has a high relative humidity. After the gas enters the cylinder, it is partially liquefied into water droplets attached to the inner wall of the cylinder and the exhaust cap. Under gravity, the water droplets converge into streams and flow downward along the inner wall and converge at the bottom of the cylinder.

[0047] The exhaust assembly 5 also includes a liquid wick 21, which is intended to diffuse the liquid accumulated at the bottom of the cylinder outward. The liquid wick 21 includes an absorption pad 22 attached to the bottom of the cylinder, a volatile part 23 wrapped outside the air nozzle 16, and a guide part 24 connecting the absorption pad and the volatile part, and the volatile part 23 is located outside the exhaust cap. The absorption pad 22 is immersed in the fluid gathered at the bottom of the cylinder, and the fluid molecules are transferred to the volatile part 23 along the guide part 24 through the intermolecular attraction. The volatile part 23 is in direct contact with the external environment and has strong volatility. A concentration gradient is formed between the volatile part and the absorption pad, so that the fluid in the cylinder is continuously diffused outward against gravity.

[0048] The air nozzle 16 is a detachable component, and its purpose is to install the liquid absorbent core. Specifically, a threaded mounting hole is provided on the exhaust cap 12, and a thread matching therewith is provided at one end of the air nozzle 16, but a clearance groove is also provided on the threaded mounting hole provided on the exhaust cap 12, and the clearance groove is used for routing the liquid absorbent core 21. The surface of the other end of the air nozzle 16 exposed to the exhaust cap 12 is roughened, and then the volatile part 23 of the liquid absorbent core is sleeved, which is conducive to the fastening connection of the liquid absorbent core.

[0049] The inner wall of the cylinder 11 is provided with a wire groove 25 along the axial direction, and the wire groove is used for the routing of the liquid absorbent core guide part 24; a core pressing piece 26 is built into the cylinder, and the core pressing piece includes an integrated pressure pad part 27 and a wire pressing part 28, and the pressure pad part 27 is pressed tightly on the absorption pad part 22 of the liquid absorbent core, and a through hole 29 is provided on the pressure pad part for fluid flow, and the collected fluid is absorbed by the absorption pad part through this through hole; the wire pressing part 28 has all or part of the protrusions that cooperate with the wire groove 25 to press the guide part 24 tightly against the groove wall of the wire groove. The core pressing piece 26 is intended to stabilize the shape of the liquid absorbent core to prevent it from curling or dislocation.

[0050] According to the above, the exhaust assembly can realize the automatic exhaust function. In practice, the automatic exhaust function cannot completely or mostly exhaust the accumulated gas, because after the predetermined liquid level is reached and the air hole 16 is opened, the gas is automatically discharged outward, and then the liquid level will rise again and the air hole will be closed again. Therefore, the setting of the air hole is to ensure the minimum safe value of the liquid level. Based on this, the exhaust assembly of this embodiment also has a manual exhaust function to achieve the exhaust of nearly all the gas, so that the fluid level rises to a high level.

[0051] A pressure rod 30 is movably provided on the exhaust cap 12, and a push rod 31 is provided at the bottom of the pressure rod. The push rod sequentially penetrates the pressure pad portion 27 of the pressure core 26, the absorption pad portion 22 of the absorbent core 21 and the cylinder body 11, and then touches the sliding sleeve 15. By changing the axial displacement of the pressure rod, the push rod can push the sliding sleeve to slide, thereby opening the air hole to realize gas discharge.

[0052] The pressure rod 30 is threadedly matched with the exhaust cap 12, and a top block 32 is connected to the bottom of the pressure rod. A return spring 33 is provided between the top block 32 and the pressure pad 27 of the pressure core 26 and is sleeved outside the pressure rod 31. The pressure rod and the exhaust cap threaded match can realize self-locking. By rotating the pressure rod, the height of the top block can be changed, and then the height of the sliding sleeve can be changed. The self-locking of the thread allows the compressed return spring to always provide elastic force, which presses the pressure pad 27 tightly against the absorption pad 22.

[0053] The top block 32 is integrally connected with a pressure arm 34, which is radially against the wire pressing portion 28 of the pressure core 26, and is intended to provide pressure on the wire pressing portion to press it tightly against the wire passing groove 25, so as to prevent it from being dislocated from the wire passing groove under the expansion of the wick. At this time, the pressure rod 30 is pivotally connected to the top block 32, that is, the top block has a degree of rotational freedom, and the wire pressing portion 28 is provided with an axially extending guide groove 35, and the pressure arm 34 is fitted in this guide groove 35. When the pressure rod 30 is rotated, the rotational torque cannot drive the pressure arm to rotate, and the guide groove also provides a guiding function.

[0054] The present invention integrates the flow valve, exhaust assembly and temperature control head on a special-shaped multi-way, thereby improving the integration level and achieving multiple purposes of stabilizing the flow under pressure fluctuations, automatically exhausting and controlling the fluid flow by sensing the ambient temperature feedback. The exhaust assembly is arranged at the highest point of the multi-way, and the exhaust efficiency is the highest. At the same time, the exhaust assembly has both automatic and manual exhaust functions, and can volatilize and release the water accumulated during exhaust through the liquid wick.

[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A multi-pass flow control device for a HVAC pipeline, comprising a multi-pass as an installation body, the multi-pass is H-shaped, and includes a connected inlet chamber, a steady flow chamber and a baffle chamber, one end of the inlet chamber is provided with a temperature control valve core, and a temperature control head is installed at the temperature control valve core, and a flow valve core is provided at one end of the steady flow chamber; a partition with a through-flow opening is built into the baffle chamber, and the baffle chamber is divided into an exhaust chamber and a sewage chamber, the sewage chamber and the inlet chamber are connected through an inner inlet, the exhaust chamber and the steady flow chamber are connected through an inner outlet, and the top of the exhaust chamber is connected with an exhaust assembly; The flow path of the multi-channel internal fluid is: it enters the inlet chamber from one end of the inlet chamber connected to the system pipeline, then flows through the internal inlet port to enter the sewage chamber of the deflection chamber, then flows through the flow port to enter the exhaust chamber, then flows through the internal outlet port to enter the steady flow chamber, and finally flows out from one end of the steady flow chamber connected to the system pipeline.

2. The multi-channel flow control device according to claim 1, characterized in that: The sewage discharge chamber of the deflection chamber is downwardly connected to a sewage discharge valve for sewage discharge.

3. The multi-channel flow control device according to claim 1, characterized in that: The exhaust assembly includes a cylinder connected to the multi-way, an exhaust cap is connected to the top of the cylinder, a radially protruding wrench position is integrally arranged on the cylinder, the bottom is built into the multi-way and a step surface is formed radially inwardly at the bottom, and a sliding sleeve is coaxially provided; an air hole is provided on the side wall of the bottom of the cylinder, an air nozzle is provided on the exhaust cap, and the air hole and the air nozzle constitute an air passage for exhausting air outward; a float is connected to the bottom of the sliding sleeve, and the float is immersed in the fluid.

4. The multi-channel flow control device according to claim 3, characterized in that: An eccentric axially protruding guide protrusion is integrally provided at the bottom of the cylinder, and the guide protrusion passes through a through hole provided on the sliding sleeve. A limit piece is connected to the guide protrusion. The sliding sleeve is coaxially matched with the cylinder, and a constant pressure port is also provided at the through hole provided on the sliding sleeve. The eccentric guide protrusion guides the sliding sleeve and eliminates the rotational freedom. The limit piece is intended to prevent the sliding sleeve from being out of fit with the cylinder, and the constant pressure port is intended to eliminate the obstruction of the pressure difference on the sliding sleeve.

5. The multi-channel flow control device according to claim 4, characterized in that: The exhaust component also includes a liquid absorbent core, which includes an absorbent pad part, a volatilizing part and a guiding part that are integrally connected, wherein the absorbent pad part is attached to the bottom of the cylinder body, and the volatilizing part is wrapped outside the air nozzle.

6. The multi-channel flow control device according to claim 5, characterized in that: The air nozzle is a detachable component. A avoidance groove is arranged on the exhaust cap at the connection with the air nozzle. The avoidance groove is used for routing the liquid absorption core. The air nozzle has a rough outer surface.

7. The multi-channel flow control device according to claim 6, characterized in that: The inner wall of the cylinder is axially provided with a wire passing groove, which is used for the wiring arrangement of the guide part; a pressing core component is built into the cylinder, which includes an integrated pressure pad part and a wire pressing part, and the pressure pad part is tightly pressed on the absorption pad part of the absorbent core, which is provided with a through hole; the wire pressing part cooperates with the wire passing groove to press the guide part tightly against the groove wall of the wire passing groove.

8. The multi-channel flow control device according to claim 7, characterized in that: A pressure rod is movably arranged on the exhaust cap, and a push rod is arranged in contact with the bottom of the pressure rod. The push rod sequentially penetrates the pressure pad part of the pressure core, the absorption pad part of the absorbent core and the cylinder body and then touches the sliding sleeve. By changing the axial displacement of the pressure rod, the air hole can be opened to realize gas discharge.

9. The multi-channel flow control device according to claim 8, characterized in that: The pressure rod is threadedly connected to the exhaust cap, a top block is connected to the bottom of the pressure rod, and a return spring sleeved outside the pressure rod is arranged between the top block and the pressure pad of the pressure core.

10. The multi-channel flow control device according to claim 9, characterized in that: The top block is integrally connected with a pressure arm, which radially abuts against the wire pressing part of the pressure core piece. The pressure rod is pivotally connected to the top block. The wire pressing part is provided with an axially extending guide groove, and the pressure arm is fitted in the guide groove.

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