A device and method for reducing airlock on the user side of a heating system.

Abstract

This invention discloses a device and method for reducing airlock on the user side of a heating system. The device includes a heat exchange assembly comprising a heat exchanger, a primary network assembly disposed on the primary network side of the heat exchanger, and a secondary network assembly disposed on the secondary network side of the heat exchanger. A venting assembly connected to the heat exchange assembly and used for gas-liquid separation of the makeup water is also included. The venting assembly includes a venting component for separating and automatically discharging gas from the makeup water. The venting component separates the makeup water into gas and liquid, automatically discharging the separated gas and outputting the separated liquid to the secondary network assembly. By using the venting component to separate the makeup water into gas and liquid, gas is automatically discharged before entering the user system, preventing airlock on the user side and improving heating quality. Gas discharge requires no manual intervention, reducing the frequency of on-site venting, lowering operation and maintenance costs, and reducing impurities entering the heat exchanger, improving heat exchange efficiency and ensuring safe and efficient system operation.

Description

Technical Field

[0001] This invention relates to the field of heating systems, and in particular to a device and method for reducing airlock on the user side of a heating system. Background Technology

[0002] Heating systems typically use heat exchange stations to isolate the primary and secondary networks for heat exchange. To compensate for water losses during network operation, heat exchange stations often employ a "one-replenishment, two-replenishment" method, where circulating water is directly supplied from the primary network to the secondary network. This direct supply of water from the primary network to the secondary network is a common method for maintaining water balance and operating pressure in the secondary network.

[0003] During the maintenance of heating pipelines, pressure testing is required to locate leaks. Before the pressure test, the circulating water in the pipeline must be drained and test gas is injected into the pipeline. The location of the leak is determined by the leakage of the test gas.

[0004] After the pressure test is completed, some test gas will still remain in the pipeline network, and it is difficult to completely remove it. During heating operation, when the primary network replenishes water to the secondary network, the gas remaining in the primary network pipeline enters the secondary network along with the replenished water and accumulates in the user-side heat dissipation system.

[0005] Because the density of gas is less than that of water, residual gas tends to accumulate at high points in the user-side system, forming airlocks. This can lead to poor or even no circulation in the user-side system, resulting in substandard room temperature for users and causing numerous complaints. At the same time, gas in the secondary pipeline network is not easy to expel on its own, usually requiring staff to go door-to-door to perform venting operations, which is labor-intensive, costly to maintain, and seriously affects the quality of heating services. Summary of the Invention

[0006] Therefore, the technical problem to be solved by the present invention is to reduce or even avoid the occurrence of air blockage in the user-side system and reduce the workload of operation and maintenance of the heating system.

[0007] The above-mentioned technical problems are solved by the following technical solution: The present invention proposes a device for reducing air blockage on the user side of a heating system, which includes a heat exchange component, wherein the heat exchange component includes a heat exchanger, a first-network component disposed on the first network side of the heat exchanger, and a second-network component disposed on the second network side of the heat exchanger. An exhaust assembly connected to the heat exchange component and used for gas-liquid separation of the makeup water, the exhaust assembly including an exhaust element for separating gas in the makeup water and automatically discharging it; The exhaust component is used to perform gas-liquid separation on the water entering it, and the separated gas is automatically discharged, while the separated liquid is output to the second mesh assembly.

[0008] In a preferred embodiment of the device for reducing air blockage on the user side of the heating system according to the present invention: the venting component includes an venting tank, an automatic venting valve disposed on the top of the venting tank, and a drain valve disposed on the side of the venting tank.

[0009] In a preferred embodiment of the device for reducing airlock on the user side of the heating system according to the present invention: the secondary network assembly includes a secondary network water supply pipe, a secondary network water supply valve disposed on the secondary network water supply pipe, a secondary network return water pipe, and a circulation pump disposed on the secondary network return water pipe.

[0010] In a preferred embodiment of the device for reducing airlock on the user side of the heating system according to the present invention: the secondary water supply pipe is connected to the secondary outlet of the heat exchanger, and the secondary return water pipe is connected to the secondary inlet of the heat exchanger.

[0011] In a preferred embodiment of the device for reducing airlock on the user side of the heating system according to the present invention: one end of the primary network water supply pipe is connected to the primary network return water pipe, and the other end of the primary network water supply pipe is connected to the upper end of the exhaust tank.

[0012] In a preferred embodiment of the device for reducing airlock on the user side of the heating system according to the present invention: a pressure gauge is installed on the water supply pipe on the network side.

[0013] In a preferred embodiment of the device for reducing airlock on the user side of the heating system according to the present invention: one end of the secondary network water supply pipe is connected to the lower end of the exhaust tank, and the other end of the secondary network water supply pipe is connected to the secondary network return water pipe via an electric regulating valve.

[0014] In a preferred embodiment of the device for reducing airlock on the user side of the heating system according to the present invention: an instrument is installed on the secondary network side water supply pipe.

[0015] This invention also proposes a method for reducing airlock on the user side of a heating system, comprising the following steps: The water supply from one side of the net is delivered to the exhaust component, where the water supply undergoes gas-liquid separation. The separated gas is automatically discharged, and the separated liquid is output to the secondary network side; When impurities accumulate in the exhaust component to a preset amount, the impurities are discharged through the drain valve installed on the exhaust component. The water supply flow rate to the secondary network side is adjusted by an electrically adjustable valve located between the exhaust component and the secondary network assembly.

[0016] The beneficial effects of this invention are as follows: By using an exhaust device to separate the make-up water into gas and liquid components, the gas is automatically discharged before entering the user system, preventing air blockage on the user side and improving heating quality. Gas discharge requires no manual intervention, reducing the number of on-site exhausts, lowering operating and maintenance costs, and reducing impurities entering the heat exchanger, thus improving heat exchange efficiency and ensuring safe and efficient system operation. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments of the present invention will be briefly described below. Obviously, the drawings described below only relate to some embodiments of the present invention and are not intended to limit the present invention. Wherein: Figure 1 The overall structure diagram is shown; Figure 2 The structural diagram of the heat exchange assembly and the exhaust assembly is shown. Detailed Implementation

[0018] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0019] The terminology used in this invention is that which is currently widely used in the art in consideration of the function of the invention; however, these terms may vary according to the intent of those skilled in the art, precedent, or new technology in the art. Furthermore, specific terms may be chosen by the applicant, and in such cases, their detailed meanings will be described in the detailed description of the invention. Therefore, the terms used in this specification should not be construed as simple names, but rather based on their meanings and the overall description of the invention.

[0020] Reference Figure 1 A device and method for reducing airlock on the user side of a heating system are provided, including... The heat exchange assembly 1 and the exhaust assembly 2 connected to the heat exchange assembly 1 are provided. The heat exchange assembly 1 includes a heat exchanger 11, a primary mesh assembly 12 disposed on the primary mesh side of the heat exchanger 11, and a secondary mesh assembly 13 disposed on the secondary mesh side of the heat exchanger 11. The heat exchanger 11 is the component in the heat exchange station that performs heat exchange between the primary mesh and the secondary mesh. The heat from the primary mesh is transferred to the secondary mesh through the heat exchanger 11, and the water on both sides does not mix.

[0021] The primary network component 12 is used to connect the water supply and return pipelines of the primary network, and the secondary network component 13 is used to connect the water supply and return pipelines of the secondary network.

[0022] The exhaust assembly 2 includes an exhaust element 21, which separates the gas and liquid in the makeup water entering it. The separated gas is automatically discharged, and the separated liquid is output to the secondary network assembly 13. When the heating system uses a primary-to-secondary water supply method, residual gas in the primary network pipeline will enter the secondary network along with the makeup water. This system separates the gas in the makeup water from the exhaust element 21 before it enters the user system, thus ensuring that the makeup water entering the user system no longer carries gas.

[0023] The venting component 21 includes an venting tank 211, an automatic venting valve 212 located at the top of the venting tank 211, and a drain valve 213 located on the side of the venting tank 211. The venting tank 211 is a container for holding makeup water and performing gas-liquid separation. After makeup water enters the venting tank 211, because the gas density is less than water, the gas in the makeup water automatically rises inside the tank and accumulates in the space at the top of the venting tank 211. When the accumulated gas at the top reaches a certain amount, the automatic venting valve 212 automatically opens, venting the gas out of the tank. The entire venting process requires no manual intervention. The drain valve 213 is located on the side of the venting tank 211. When impurities accumulated inside the venting tank 211 reach a certain amount, the drain valve 213 can be opened to discharge the impurities, preventing them from entering the secondary heat exchanger with the makeup water. This avoids blockage of the secondary heat exchanger and helps improve its heat exchange efficiency.

[0024] It is understood that the automatic venting valve 212 can adopt a float-type automatic venting structure or a lever-type automatic venting structure, which can automatically open and vent according to the accumulation of gas in the tank. In some other embodiments, the drain valve 213 can be in the form of a ball valve, gate valve, or butterfly valve, and the venting tank 211 can be made of carbon steel or stainless steel.

[0025] The primary water supply component 12 includes a primary water supply pipe 121, a primary water supply valve 123 installed on the primary water supply pipe 121, a primary water return pipe 122, and a primary water return valve 124 installed on the primary water return pipe 122. The primary water supply pipe 121 is used to supply high-temperature hot water from the primary network to the heat exchanger 11, the primary water return pipe 122 is used to return the heat exchanged primary network water back to the primary network, the primary water supply valve 123 is used to control the on / off state of the primary water supply pipe 121, and the primary water return valve 124 is used to control the on / off state of the primary water return pipe 122.

[0026] The secondary network assembly 13 includes a secondary network water supply pipe 133, a secondary network water supply valve 131 installed on the secondary network water supply pipe 133, a secondary network return water pipe 134, and a circulation pump 132 installed on the secondary network return water pipe 134. The secondary network water supply pipe 133 is used to transfer the heat from the primary network to the secondary network and send the hot water to the user side. The secondary network return water pipe 134 is used to send the return water from the user side back to the heat exchanger 11 for reheating. The secondary network water supply valve 131 is used to control the opening and closing of the secondary network water supply pipe 133. The circulation pump 132 drives the water from the secondary network to circulate in the secondary network water supply pipe 133 and the secondary network return water pipe 134.

[0027] In summary, heat exchange between the primary and secondary networks is achieved through heat exchanger 11 in heat exchange component 1. The circulation pipelines of the primary and secondary networks are connected through primary network component 12 and secondary network component 13, respectively. The exhaust component 21 in exhaust component 2 performs gas-liquid separation on the primary and secondary water replenishment. The separated gas is automatically discharged, and the separated liquid is output to secondary network component 13. With the cooperation of multiple components, the gas can be separated and discharged before the water replenishment enters the user system, thereby avoiding air blockage in the user-side system.

[0028] In some embodiments, the secondary network water supply pipe 133 is connected to the secondary network outlet of the heat exchanger 11, and the secondary network return pipe 134 is connected to the secondary network inlet of the heat exchanger 11. The water in the secondary network absorbs heat from the primary network within the heat exchanger 11, causing its temperature to rise. It then flows out from the secondary network outlet of the heat exchanger 11 and is sent to the user side via the secondary network water supply pipe 133. The return water from the user side, after heat dissipation, flows back to the secondary network inlet of the heat exchanger 11 via the secondary network return pipe 134 and re-enters the heat exchanger 11 for reheating under the drive of the circulation pump 132, forming a circulation loop for the secondary network.

[0029] One end of the first-net side water supply pipe 22 is connected to the first-net return water pipe 122, and the other end of the first-net side water supply pipe 22 is connected to the upper end of the exhaust tank 211. The water intake points for the first and second water supplies are located on the first-net return water pipe 122. After the water flows out from the first-net return water pipe 122, it enters the tank from the upper end of the exhaust tank 211 through the first-net side water supply pipe 22. The water supply enters from the upper end of the tank, and the gas enters the tank with the water supply and is directly in the gas collection space at the upper part of the tank, which facilitates gas accumulation and discharge by the automatic exhaust valve 212.

[0030] A pressure gauge 24 is installed on the water supply pipe 22 on the first network side. The function of the pressure gauge 24 is to monitor the water supply pressure in the water supply pipe 22 on the first network side, so that the operators can keep track of the water supply pressure status and detect abnormal water supply pressure in a timely manner.

[0031] One end of the secondary network side water supply pipe 23 is connected to the lower end of the exhaust tank 211, and the other end is connected to the secondary network return water pipe 134 via the electric regulating valve 26. The replenished water, after gas-liquid separation, flows out from the lower end of the exhaust tank 211, enters the secondary network return water pipe 134 via the secondary network side water supply pipe 23 and the electric regulating valve 26, and flows to the user side along with the secondary network circulating water. The replenished water flows out from the lower end of the tank because the gas has risen to the top of the exhaust tank 211, and the replenished water at the lower part of the tank does not contain gas. Water flowing out from the lower end ensures that the replenished water entering the secondary network return water pipe 134 is degassed water. The electric regulating valve 26 adjusts the replenished water flow rate according to the water demand of the secondary network system to achieve automatic water replenishment.

[0032] An instrument 25 is installed on the secondary network side water supply pipe 23. The function of the instrument 25 is to monitor the status parameters of the water supply in the secondary network side water supply pipe 23, so that the operators can grasp the water supply situation and cooperate with the electric regulating valve 26 to achieve precise control of the water supply.

[0033] It is understandable that in some other embodiments, the water intake point of the water supply pipe 22 on the first network side can also be set on the water supply pipe 121 on the first network side, as long as it can obtain water supply from the first network side.

[0034] In another alternative implementation, pressure gauge 24 and instrument 25 may also be digital displays, making it easier for operators to read the values ​​directly.

[0035] In summary, the replenished water in the return water pipe 122 of the first network is introduced into the exhaust tank 211 through the first network side replenished water pipe 22, and the degassed replenished water is sent back to the second network return water pipe 134 through the second network side replenished water pipe 23. The replenished water status is monitored by the pressure gauge 24 and the instrument 25, and the replenished water volume is adjusted by the electric regulating valve 26. The upper and lower interfaces of each pipe and the exhaust tank 211 are coordinated with each other, so that the replenished water and degassed process can be run continuously and stably without manual intervention.

[0036] In some embodiments, a method for reducing airlock on the user side of a heating system is provided, comprising the following steps: The makeup water from the first network side is transported to the venting unit 21 via the first network side makeup water pipe 22. The venting unit 21 separates the makeup water into gas and liquid. After the makeup water enters the venting tank 211, the gas in the makeup water automatically rises inside the tank and accumulates in the space at the top of the venting tank 211. The separated gas is automatically discharged through the automatic venting valve 212, and the separated liquid flows out from the lower end of the venting tank 211 and is output to the second network side via the second network side makeup water pipe 23. When the impurities in the venting tank 211 accumulate to a certain amount, the drain valve 213 is opened to discharge the impurities out of the tank. Step five: The makeup water flow rate output to the second network side is adjusted by the electric regulating valve 26 to match the makeup water volume with the water demand of the second network system.

[0037] It is understood that the steps in the above method can be adjusted according to actual operating conditions. In some other embodiments, operators can also adjust the opening of the electrically adjustable valve 26 according to the readings of pressure gauge 24 and instrument 25 to adapt to different water replenishment needs. In another optional embodiment, the drain valve 213 can also be used periodically after each water replenishment and degassing operation for a period of time.

[0038] In summary, the system uses the venting component 21 to separate the gas and liquid in the primary and secondary water supply systems. The separated gas is automatically discharged through the automatic venting valve 212. The degassed water is returned to the secondary network circulation system through the secondary network water supply pipe 23. Impurities in the tank are periodically discharged through the drain valve 213. The water supply volume is adjusted through the electric regulating valve 26. These steps are interconnected, enabling continuous and stable removal of gas and impurities from the water supply. This avoids air blockage in the user-side system, reduces the number of times staff need to vent the system, improves the operating efficiency of the heating system and user satisfaction, and solves the technical problem of air blockage and difficulty in completely removing gas in the existing heating system on the user side.

[0039] Finally, it should be noted that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways as long as they do not depart from the scope of the present invention.

Claims

1. A device for reducing airlock on the user side of a heating system, characterized in that: include, The heat exchange assembly (1) includes a heat exchanger (11), a first mesh assembly (12) disposed on the first mesh side of the heat exchanger (11), and a second mesh assembly (13) disposed on the second mesh side of the heat exchanger (11). An exhaust assembly (2) connected to the heat exchange assembly (1) and used for gas-liquid separation of the makeup water, the exhaust assembly (2) including an exhaust component (21) for separating the gas in the makeup water and automatically discharging it. The exhaust component (21) is used to perform gas-liquid separation on the water entering it. The separated gas is automatically discharged, and the separated liquid is output to the second mesh assembly (13).

2. The device for reducing airlock on the user side of a heating system according to claim 1, characterized in that: The exhaust component (21) includes an exhaust canister (211), an automatic exhaust valve (212) disposed on the top of the exhaust canister (211), and a drain valve (213) disposed on the side of the exhaust canister (211).

3. The device for reducing airlock on the user side of a heating system according to claim 2, characterized in that: The first water supply component (12) includes a first water supply pipe (121), a first water supply valve (123) installed on the first water supply pipe (121), a first water return pipe (122), and a first water return valve (124) installed on the first water return pipe (122). The water supply pipe (121) is connected to the inlet of the heat exchanger (11) on the first side, and the water return pipe (122) is connected to the outlet of the heat exchanger (11) on the first side.

4. The device for reducing airlock on the user side of a heating system according to claim 2, characterized in that: The second network component (13) includes a second network water supply pipe (133), a second network water supply valve (131) installed on the second network water supply pipe (133), a second network return water pipe (134), and a circulation pump (132) installed on the second network return water pipe (134).

5. The device for reducing airlock on the user side of a heating system according to claim 4, characterized in that: The secondary water supply pipe (133) is connected to the secondary outlet of the heat exchanger (11), and the secondary return water pipe (134) is connected to the secondary inlet of the heat exchanger (11).

6. The device for reducing airlock on the user side of a heating system according to claim 3, characterized in that: One end of the water supply pipe (22) on the first network side is connected to the water return pipe (122) on the first network side, and the other end of the water supply pipe (22) on the first network side is connected to the upper end of the exhaust tank (211).

7. The device for reducing airlock on the user side of a heating system according to claim 6, characterized in that: A pressure gauge (24) is installed on the water supply pipe (22) on the first side of the network.

8. The device for reducing airlock on the user side of a heating system according to claim 4, characterized in that: One end of the secondary water supply pipe (23) is connected to the lower end of the exhaust tank (211), and the other end of the secondary water supply pipe (23) is connected to the secondary return water pipe (134) via an electric regulating valve (26).

9. The device for reducing airlock on the user side of a heating system according to claim 8, characterized in that: An instrument (25) is installed on the water supply pipe (23) on the second network side.

10. A method for reducing airlock on the user side of a heating system, characterized in that: The device for reducing airlock on the user side of a heating system according to any one of claims 1 to 9 includes the following steps: The water supply from one side of the net is transported to the exhaust component (21) for gas-liquid separation. The separated gas is automatically discharged, and the separated liquid is output to the secondary network side; When impurities accumulate in the exhaust component (21) to a preset amount, the impurities are discharged through the drain valve installed on the exhaust component (21); The water supply flow rate to the secondary network side is adjusted by an electric regulating valve located between the exhaust component (21) and the secondary network assembly (13).

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