Gas discharge device and control method thereof, and water heating system

Abstract

The application provides a gas exhaust device, a control method thereof and a water heating system. The gas exhaust device comprises a shell, and a liner arranged in the shell and forming an adjusting cavity with the shell. The shape of the liner is adjustable and / or the volume of the liner is adjustable. The gas exhaust device, the control method thereof and the water heating system provided by the application can adjust the shape and / or the volume of the liner through the adjusting cavity, change the solubility of the gas in water, realize the technical effect of separating the gas from water, and make the separated gas rise to the top of the liner due to the buoyancy effect and finally be discharged through an exhaust port, thereby reducing the noise in the water heating system and ensuring the use experience and life safety of users.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heating equipment, in particular to a gas discharge device, a control method thereof and a water heating system. BACKGROUND

[0002] The premise of the quiet and comfortable operation of the water heating system is the absence of air. If not, the system will have all kinds of problems from the frequent gurgling sound of the pipeline to the complete loss of heat. For example: causing chemical oxidation of metal parts such as steel in the system and air, accelerating the corrosion of these parts. Or cause the heat load loss of the heat dissipation end or the entire system. Or the lubrication of the shield sleeve of the wet rotor water pump is not enough. The mixture of water and air causes the solution inside the water pump to foam, and the shield sleeve needs water film lubrication, which cannot be achieved. The wet rotor water pump completely depends on this layer of lubricating film, and if not, the water pump will be damaged soon.

[0003] At the same time, due to the supply problem of natural gas, European countries will gradually shift from the mode of using gas wall-hung boilers as the main heating equipment to the mode of using heat pumps as the main heating equipment in the future. R32 refrigerant heat pumps will gradually exit the market and be replaced by new refrigerant R290. R290 refrigerant is not only flammable, but also when R290 leaks into the room, the human body inhales low-concentration R290, which can cause dizziness and headache. If a large amount of R290 is inhaled, it may cause great harm to the human body, mainly the nervous system, skin, and mucous membranes.

[0004] However, the existing water heating system exhaust valve can only discharge the static air bag and air in the large air bubbles, and it cannot discharge the air dissolved in the water system, nor can it discharge the leaked R290 by dissolving, which seriously affects the user's experience and life safety. SUMMARY

[0005] In order to solve the technical problem of poor exhaust effect and single function of the exhaust valve of the water heating system in the prior art, which affects the user's experience, a gas discharge device and a control method thereof and a water heating system are provided, which utilize the adjusting cavity to adjust the shape and / or volume of the inner container to change the solubility of the gas and realize gas separation and discharge.

[0006] A gas discharge device, comprising:

[0007] a shell;

[0008] an inner container, disposed in the shell, and an adjusting cavity is formed between the inner container and the shell;

[0009] The shell is provided with a water inlet, a water outlet, an exhaust port and an adjusting port, the water inlet, the water outlet and the exhaust port are communicated with the inside of the inner container, and the exhaust port is located at the top of the inner container.

[0010] The adjusting port is communicated with the adjusting cavity, the adjusting cavity is communicated with the external air pressure regulator through the adjusting port, and the adjusting cavity can change the shape and / or volume of the inner container.

[0011] The gas exhaust device further comprises a baffle, the baffle is arranged in the inner container, and the baffle is located between the water inlet and the water outlet; or, the water flow direction of the water inlet is towards the baffle.

[0012] The baffle has an included angle with the water flow direction of the water inlet, and the included angle is adjustable.

[0013] The number of baffles is at least two, and all the baffles are arranged side by side in the direction from the water inlet to the water outlet.

[0014] The baffle is provided with a flow hole; or, the baffle is a mesh structure.

[0015] The gas exhaust device further comprises an exhaust valve, and the exhaust valve is arranged at the exhaust port.

[0016] The exhaust valve comprises:

[0017] A valve body is arranged on the shell, and the valve body is provided with an air outlet;

[0018] A buoyancy structure is movably arranged in the valve body;

[0019] An exhaust valve core is arranged at the air outlet, and the exhaust valve is connected with the buoyancy structure, and the air outlet is communicated with the exhaust port through the exhaust valve core.

[0020] The buoyancy structure and the side wall of the valve body form an air passage, and the gas in the inner container can flow above the buoyancy structure through the air passage.

[0021] A control method of the above-mentioned gas exhaust device, comprising:

[0022] Obtaining the difference △P of the water inlet pressure and the water outlet pressure of the gas exhaust device;

[0023] Comparing △P with a preset difference P limit;

[0024] If △P < P limit, the volume of the inner container is adjusted.

[0025] The gas discharge device further comprises a baffle arranged in the inner container, and after the step of comparing △P with the preset difference value P, the method further comprises:

[0026] If △P

[0027] After the step of comparing △P with the preset difference value P, the method further comprises:

[0028] Judging whether the volume of the inner container can be adjusted;

[0029] If yes, adjusting the volume of the inner container;

[0030] If no, adjusting the included angle between the baffle and the water flow direction of the water inlet.

[0031] A water heating system comprising the above gas discharge device or applying the control method of the above gas discharge device.

[0032] The gas discharge device and the control method thereof and the water heating system provided by the application adjust the shape and / or volume of the inner container by adjusting the adjusting cavity, change the flow direction and pressure of the water flow entering the inner container through the water inlet, thereby changing the solubility of the gas in the water, and achieve the technical effect of separating the gas from the water. The separated gas will rise to the top of the inner container due to the buoyancy and be finally discharged through the exhaust port. The problems in the prior art that only large gas bubbles and static air bags formed in the water can be discharged are overcome. In addition, the leaked refrigerant can be dissolved in the water, carried by the water, and discharged at the gas discharge device by utilizing the circulating flow of the water in the water heating system, thereby solving the technical problem in the prior art that the leaked refrigerant cannot be discharged, reducing the noise in the water heating system, and ensuring the use experience and life safety of users. BRIEF DESCRIPTION OF DRAWINGS

[0033] Fig. 1 A sectional view of the gas discharge device provided by the embodiment of the application;

[0034] Fig. 2 A structural schematic view of the baffle provided by the embodiment of the application;

[0035] Fig. 3 A control flowchart of the gas discharge device provided by the embodiment of the application;

[0036] In the drawings:

[0037] 1, shell; 2, inner container; 11, adjusting cavity; 12, water inlet; 13, water outlet; 14, exhaust port; 15, adjusting port; 3, baffle; 41, valve body; 42, buoyancy structure; 43, exhaust valve core. DETAILED DESCRIPTION

[0038] In order to make the objects, technical solutions and advantages of the present application clearer, the following further describes the present application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely intended to explain the present application and should not be used to limit the present application.

[0039] In order to make the objects, technical solutions and advantages of the present application clearer, the following further describes the present application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely intended to explain the present application and should not be used to limit the present application.

[0040] It should be noted that the terms "first", "second" and the like in the description of the specification and claims of the present application and the above-described accompanying drawings are used to distinguish similar objects, and do not necessarily indicate or imply a specific order or sequence. It should be understood that the terms used in this way can be interchanged as appropriate, so that the embodiments of the present application described herein can be implemented. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device that includes a series of steps or units does not necessarily limit to those steps or units clearly listed, but can include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0041] It should be noted that in the description of the present application, the terms "up", "down", "left", "right", "inner", "outer" and the like indicate the direction or positional relationship of the terms based on the direction or positional relationship shown in the drawings, which is merely for the purpose of description, and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0042] In addition, it should be noted that in the description of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "setting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0043] The premise of the quiet and comfortable operation of the water heating system is the absence of air. If not, the system will have all kinds of problems from the frequent gurgling sound of the pipeline to the complete loss of heat. For example: the chemical oxidation of metal parts such as steel in the system with air, which accelerates the corrosion of these parts. Or cause the heat load loss of the heat dissipation end or the entire system. Or the lubrication of the shield sleeve of the wet rotor water pump is not enough. The mixture of water and air causes the solution inside the water pump to foam, and the shield sleeve needs water film lubrication. The wet rotor water pump completely depends on this layer of lubricating film, and if it is not, the water pump will be damaged soon. At the same time, due to the problem of natural gas supply, European countries will gradually change the mode of using gas wall-mounted boilers as the main heating equipment in the future. The R32 refrigerant heat pump will gradually withdraw from the market, and be replaced by a new type of refrigerant R290. R290 refrigerant is not only flammable, but also when R290 leaks into the room, inhaling low-concentration R290 by the human body will cause dizziness and headache. If a large amount of R290 is inhaled, it may cause great harm to the human body, mainly the nervous system, skin and mucous membrane, etc. However, the existing water heating system exhaust valve can only exhaust the static air bag and air in the large air bubbles of the general exhaust valve, and it cannot exhaust the air dissolved in the water system, nor can it exhaust the leaked R290 by dissolving. It seriously affects the user's experience and life safety. Therefore, the present application provides a kind of Figs. 1-3The gas discharge device shown comprises a shell 1, an inner container 2 arranged in the shell 1, and an adjusting cavity 11 formed between the shell 1 and the inner container 2. The shell 1 is provided with a water inlet 12, a water outlet 13, an exhaust port 14, and an adjusting port 15. The water inlet 12, the water outlet 13, and the exhaust port 14 are all in communication with the inside of the inner container 2, and the exhaust port 14 is located at the top of the inner container 2. The adjusting port 15 is in communication with the adjusting cavity 11, the adjusting cavity 11 is in communication with an external gas pressure regulator through the adjusting port 15, and the adjusting cavity 11 can change the shape and / or volume of the inner container 2. By adjusting the shape and / or volume of the inner container 2 through the adjusting cavity 11, the flow direction and pressure of the water flow entering the inner container 2 through the water inlet 12 are changed, thereby changing the solubility of the gas in the water, achieving the technical effect of separating the gas from the water. The separated gas will rise to the top of the inner container 2 due to the buoyancy effect and then be discharged through the exhaust port 14. This overcomes the problem in the prior art that only large gas bubbles and static air pockets in the water can be discharged. It also solves the technical problem in the prior art that leaked refrigerant cannot be discharged, reduces the noise in the water heating system, and ensures the user's experience and safety. Specifically, the shape of the inner container 2 can be adjusted by changing the gas distribution in the adjusting cavity 11, so that the flow direction of the water flow entering the inner container 2 through the water inlet 12 changes, thereby allowing the water flow to collide in different directions to separate the gas from the water. Since the volume of the shell 1 is fixed, the volume of the inner container 2 can also be adjusted by changing the total amount of gas in the adjusting cavity 11, thereby adjusting the water pressure in the inner container 2, changing the solubility of the gas in the water, and separating the gas and water. The separated gas flows to the top of the inner container 2 and is finally discharged through the exhaust port 14. For example, reducing the total amount of gas in the adjusting cavity 11 causes the inner container 2 to expand under negative pressure, increasing the volume of the inner container 2 and reducing the water pressure in the inner container 2. The solubility of the gas in the water is directly proportional to the pressure, so the smaller the water pressure, the lower the solubility, and the easier it is for the gas to separate from the water. Since the water circulates in the water heating system, when there is a leak of refrigerant in the water heating system, the refrigerant can dissolve in the water that has completed gas separation and then separate in the gas discharge device, thereby discharging the leaked refrigerant from the water heating system using the circulating water, avoiding the leaked refrigerant from entering the room and harming the user, and improving the user's safety. The gas pressure regulator comprises a gas pump, the adjusting port 15 can be in communication with the gas pump, and the gas distribution and / or total amount of gas in the adjusting cavity 11 can be adjusted using the gas pump, thereby adjusting the volume of the inner container 2.

[0044] The gas discharging device further comprises a baffle 3 arranged in the inner container 2 and located between the water inlet 12 and the water outlet 13. The baffle 3 blocks the water flow entering the inner container 2, reduces the water flow rate, forms a pressure-reduced area, reduces the solubility of the gas in the water through the reduction of the pressure, further improves the ability of the gas to separate from the water in the form of micro-bubbles, and improves the separation and discharge effect of the gas discharging device on the gas.

[0045] Alternatively, the water flow direction of the water inlet 12 is towards the baffle 3. The baffle 3 can also block the water flow entering the inner container 2, reduce the water flow rate, form a pressure-reduced area, reduce the solubility of the gas in the water through the reduction of the pressure, further improve the ability of the gas to separate from the water in the form of micro-bubbles, and improve the separation and discharge effect of the gas discharging device on the gas. The separated gas can flow upwards along the baffle 3, accumulate into larger bubbles, reduce the possibility of the gas being dissolved into the water again, and further improve the separation and discharge effect of the gas.

[0046] The baffle 3 has an included angle with the water flow direction of the water inlet 12, and the included angle is adjustable. The separation effect on the gas is improved by adjusting the included angle to change the blocking ability of the baffle 3 on the gas flow. The angle of the included angle can be adjusted according to the water temperature in the water heating system, the water pressure in the inner container 2, and other parameters, so as to maximally reduce the solubility of the gas in the water and effectively improve the exhaust effect of the gas discharging device. Fig. 2 As shown in the figure, the baffle 3 is arranged on the inner container 2 or the shell 1 through a rotating shaft. The angle of the included angle is adjusted by rotating the rotating shaft.

[0047] The number of the baffles 3 is at least two, and all the baffles 3 are arranged side by side in the direction from the water inlet 12 to the water outlet 13. The blocking effect on the water flow is further improved by using multiple baffles 3. Different blocking effects can be achieved according to the positions of the baffles 3, and the separation effect on the gas is further improved.

[0048] Since the baffles 3 are arranged side by side, in order to ensure that the baffles 3 located downstream can also be impacted by the water flow to produce a blocking effect on the water flow, the baffles 3 are provided with flow holes. Part of the water flow can flow to the baffles 3 located downstream through the flow holes of the baffles 3 located upstream, so as to ensure the blocking effect of all the baffles 3.

[0049] Optionally, the baffle 3 has a mesh structure. In this case, most of the area of the baffle 3 is a flow hole. On the premise of ensuring the blocking effect of the baffle 3 on the water flow, the ability of the water flow to pass through the baffle 3 is improved, and the water pressure at the water outlet 13 meets the requirements of the water heating system.

[0050] The gas discharging device further comprises an exhaust valve arranged at the exhaust port 14, which controls the exhaust port 14 to avoid water in the inner container 2 from leaking through the exhaust port 14, thereby ensuring the working reliability of the gas discharging device.

[0051] The exhaust valve comprises a valve body 41 arranged on the shell 1, wherein an exhaust port is arranged on the valve body 41; a buoyancy structure 42 movably arranged in the valve body 41; and an exhaust valve core 43 arranged at the exhaust port and connected with the buoyancy structure 42, wherein the exhaust port is communicated with the exhaust port 14 through the exhaust valve core 43. The valve body 41 is communicated with the exhaust port 14, and water in the inner container 2 can enter the valve body 41 through the exhaust port 14 and lift the buoyancy structure 42 upward, so that the buoyancy structure 42 and the exhaust valve core 43 do not interact with each other, and the exhaust valve core 43 can close the exhaust port. Water in the valve body 41 cannot be discharged from the valve body 41 through the exhaust port, thereby ensuring the sealing reliability of the gas discharging device. As water flows through the gas discharging device, gas can be separated from the water and enter the valve body 41 through the exhaust port 14 as the gas rises. The gas can flow to the buoyancy structure 42 and drive the buoyancy structure 42 to move, and the buoyancy structure 42 can drive the exhaust valve core 43 to actuate the exhaust port to be opened. The gas can be discharged from the exhaust port. As the gas is discharged, the buoyancy structure 42 gradually resets, and finally the exhaust valve core 43 closes the exhaust port. In this process, the gas is discharged while the water can be sealed in the valve body 41, thereby realizing automatic exhaust of the gas discharging device.

[0052] The buoyancy structure 42 and the side wall of the valve body 41 form an air passage, and the gas in the inner container 2 can flow to the upper side of the buoyancy structure 42 through the air passage. The gas flows to the upper side of the buoyancy structure 42 and accumulates there. When the pressure of the gas is greater than the water pressure in the inner container 2, the gas lowers the water level in the valve body 41, and the buoyancy structure 42 also lowers with the water level. The lowering of the buoyancy structure 42 drives the exhaust valve core 43 to open the exhaust port for exhaust. As the gas is discharged, the liquid level in the valve body 41 rises, and the buoyancy structure 42 moves upward with the liquid level. The exhaust valve core 43 resets to close the exhaust port.

[0053] The exhaust valve further comprises a connecting rod and a spring, wherein the spring is connected to the buoyancy structure 42 through the connecting rod, and the spring can provide an elastic force to the connecting rod. The connecting rod can cooperate with the exhaust valve core 43 to open or close the exhaust port.

[0054] The exhaust valve further comprises a valve cap, which is arranged on the valve body 41 and cooperates with the valve body 41 to form an exhaust cavity, the exhaust port 14 and the outlet port are both communicated with the exhaust cavity, and the valve cap can be adjusted in the relative position on the valve body 41, so as to adjust whether the exhaust valve core 43 can open the outlet port; when the valve cap is tightened, the exhaust valve core 43 cannot open the outlet port, and when the valve cap is loosened, the exhaust valve core 43 and the buoyancy structure 42 can normally work to realize the opening and closing of the outlet port.

[0055] A control method of the gas exhaust device, comprising:

[0056] Obtaining the difference ΔP of the inlet water pressure and the outlet water pressure of the gas exhaust device;

[0057] Comparing the ΔP with a preset difference P limit;

[0058] If the ΔP < P limit, at this time the separation effect of the gas exhaust device on the gas is poor, then the volume of the inner container 2 is adjusted to improve the separation effect of the gas exhaust device on the gas.

[0059] Specifically, when the ΔP < P limit, the volume of the inner container 2 can be increased to further reduce the pressure in the inner container 2, so as to force the solubility of the gas to change greatly and improve the separation effect of the gas.

[0060] The gas exhaust device further comprises a baffle 3 arranged in the inner container 2, and after the step of comparing the ΔP with the preset difference P limit, the method further comprises:

[0061] If the ΔP < P limit, the included angle between the baffle 3 and the water flow direction of the inlet port 12 is adjusted, the blocking ability of the baffle 3 to the gas is changed by adjusting the included angle, and then the separation effect of the gas is adjusted.

[0062] Specifically, when the ΔP < P limit, the angle of the included angle can be increased to further increase the blocking ability of the baffle 3, so as to force the solubility of the gas to change greatly and improve the separation effect of the gas.

[0063] After the step of comparing the ΔP with the preset difference P limit, the method further comprises:

[0064] Judging whether the volume of the inner container 2 can be adjusted;

[0065] If yes, the volume of the inner container 2 is adjusted;

[0066] If no, the included angle between the baffle 3 and the water flow direction of the inlet port 12 is adjusted.

[0067] That is, the volume of the inner container 2 is adjusted preferentially, and when the volume of the inner container 2 cannot be adjusted (for example, the inner container 2 has been completely filled with the interior of the shell 1), the baffle 3 is controlled to rotate to continue the adjustment, thereby ensuring the separation effect of the gas.

[0068] A water heating system comprising the gas discharge device or using the control method of the gas discharge device.

[0069] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent scope of the present application. It should be noted that, for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A gas discharge device, characterized in that: include: Shell (1); Inner liner (2), the inner liner (2) is disposed inside the shell (1), and an adjustment cavity (11) is formed between the inner liner (2) and the shell (1). The shell (1) is provided with a water inlet (12), a water outlet (13), a vent (14) and an adjustment port (15). The water inlet (12), the water outlet (13) and the vent (14) are all connected to the interior of the inner liner (2), and the vent (14) is located at the top of the inner liner (2). The regulating port (15) is connected to the regulating cavity (11), and the regulating cavity (11) is connected to an external air pressure regulator through the regulating port (15). The regulating cavity (11) can change the shape and / or volume of the inner liner (2). The gas discharge device further includes an exhaust valve, which is located at the exhaust port (14); The exhaust valve includes: Valve body (41), the valve body (41) is disposed on the housing (1), and the valve body (41) is provided with an air outlet; A buoyancy structure (42) is movably disposed within the valve body (41); An exhaust valve core (43) is provided at the air outlet, and the exhaust valve is connected to the buoyancy structure (42). The air outlet is connected to the exhaust port (14) through the exhaust valve core (43). An air passage is formed between the buoyancy structure (42) and the side wall of the valve body (41), through which the gas in the inner liner (2) can flow to the top of the buoyancy structure (42).

2. The gas discharge device according to claim 1, characterized in that: The gas discharge device further includes a baffle (3), which is disposed inside the inner liner (2) and is located between the water inlet (12) and the water outlet (13); or, the water flow direction of the water inlet (12) is towards the baffle (3).

3. The gas discharge device according to claim 2, characterized in that: The baffle (3) has an angle with the water flow direction of the inlet (12), and the angle is adjustable.

4. The gas discharge device according to claim 2, characterized in that: The number of baffles (3) is at least two, and all the baffles (3) are arranged side by side along the direction from the inlet (12) to the outlet (13).

5. The gas discharge device according to claim 2, characterized in that: The baffle (3) is provided with flow holes; or, the baffle (3) is a mesh structure.

6. A control method for a gas discharge device according to any one of claims 1 to 5, characterized in that: include: Obtain the difference ΔP between the inlet and outlet water pressures of the gas discharge device; Compare △P with the preset difference P; If △P < P limit, then adjust the volume of the inner liner (2).

7. The control method for the gas discharge device according to claim 6, characterized in that: The gas discharge device further includes a baffle (3) disposed inside the inner liner (2), and after the step of comparing ΔP with a preset difference P, it further includes: If △P < P is limited, then adjust the angle between the baffle (3) and the water flow direction of the inlet (12).

8. The control method for the gas discharge device according to claim 7, characterized in that: After the step of comparing △P with a preset difference P, the method further includes: Determine whether the volume of the inner liner (2) can be adjusted; If so, adjust the volume of the inner liner (2); If not, adjust the angle between the baffle (3) and the water flow direction of the inlet (12).

9. A water heating system, characterized in that: Includes the gas exhaust device according to any one of claims 1 to 5 or the control method using the gas exhaust device according to any one of claims 6 to 8.

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