Gas heat pump
By installing a drain pipe and float structure on the flue gas heat pump, the problem of flue gas condensate freezing is solved, enabling timely discharge of condensate and ensuring stable system operation and heating effect.
Patent Information
- Application Number
- CN202423030500.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-05
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-12-05
AI Technical Summary
Gas-fired air source heat pumps are prone to freezing due to the accumulation of flue gas condensate in low-temperature environments, which affects system operation and heating performance.
A drain pipe and a float are installed on the exhaust pipe. A drain outlet is set at the bottom of the drain pipe, and the float blocks the drain outlet. The pressure of the flue gas is used to make the float float up to discharge the condensate and prevent it from freezing.
It effectively prevents condensate from freezing when the equipment is not running, ensuring stable system operation and heating effect, and preventing external water from entering and affecting safety.
Smart Images
Figure CN223484327U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of heat pump technology, specifically to a gas heat pump. Background Technology
[0002] With the implementation of the air pollution control action plan and the advancement of coal-to-electricity projects, gas-fired air source heat pump systems have been widely used in heating projects. As the name suggests, gas-fired air source heat pumps rely on natural gas as their heat source. The combustion of natural gas inevitably produces water vapor. For heating systems relying on gas-fired heat pumps, when the winter temperature is below 0°C, the condensed water vapor, if not promptly discharged, may freeze when the equipment stops operating. As the ice accumulates, it affects the operation of the entire system and its heating efficiency. Therefore, preventing the accumulation of condensate in gas-fired air source heat pump flue gas and subsequent freezing in low-temperature environments is crucial for the stable operation of gas-fired air source heat pump units and also facilitates their wider application. Utility Model Content
[0003] In view of the problems existing in the prior art, the present invention provides a gas heat pump to improve the problem that water and ice easily accumulate in the flue pipe of the existing gas heat pump, which affects the operation of the entire system and the heating effect.
[0004] To achieve the above and other related objectives, this utility model provides a gas-fired heat pump, which includes a heat pump body, a flue pipe, a drain pipe, and a float. One end of the flue pipe is connected to the flue outlet of the heat pump body, and the other end is open upwards. The drain pipe is located at the lowest point of the flue pipe, and its top is connected to the flue pipe. A drain outlet is provided at the bottom of the drain pipe. The float is located inside the drain pipe and is positioned above the drain outlet. The diameter of the float is smaller than the height of the drain pipe, and the density of the float is less than the density of water.
[0005] In one embodiment of this utility model, the exhaust pipe is provided with a mounting part for installing the drain pipe.
[0006] In one embodiment of this utility model, the mounting part is detachably connected to the drain pipe.
[0007] In one embodiment of the present invention, the drain pipe includes a first sleeve and a second sleeve, one end of the first sleeve is fixedly connected to the mounting part, and the other end is fixedly connected to the second sleeve, and the drain outlet is located at the bottom of the second sleeve.
[0008] In one embodiment of this utility model, the first sleeve and the second sleeve are threadedly connected, and a sealing element is provided between the first sleeve and the second sleeve.
[0009] In one embodiment of this utility model, the diameter of the end of the first sleeve connected to the mounting part is smaller than the diameter of the end of the first sleeve connected to the second sleeve.
[0010] In one embodiment of the present invention, the second sleeve includes a bottom wall and a side wall arranged circumferentially along the bottom wall, and the drain outlet is disposed on the bottom wall.
[0011] In one embodiment of the present invention, a clamping part is provided at one end of the first sleeve near the second sleeve.
[0012] In one embodiment of this utility model, the bottom wall and the side wall are either separate structures or integrally formed.
[0013] In one embodiment of this utility model, the height of the perimeter of the bottom wall is higher than the height of the drain outlet along the radial direction of the bottom wall.
[0014] This utility model discloses a gas-fired heat pump with a drain pipe installed on the exhaust pipe. A drain outlet is located at the bottom of the drain pipe and is sealed by a float. When the heat pump body exhausts gas through the exhaust pipe, the pressure of the flue gas ensures the float remains sealed at the drain outlet. As the condensate content in the drain pipe increases, the float rises, and the condensate is discharged through the drain outlet, at which point the float re-seals the outlet. This ensures that condensate generated during the operation of the gas-fired heat pump is discharged promptly, preventing icing when the equipment is not running and preventing the accumulation of ice from affecting the operation and heating effect of the entire system. Furthermore, during seasons when the gas-fired heat pump is not in use, external water may enter the exhaust pipe against the direction of exhaust due to various circumstances. The float can discharge the water according to the amount of water, ensuring the safety of the gas-fired heat pump. Attached Figure Description
[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other embodiments can be obtained based on these drawings without creative effort.
[0016] Figure 1 This is a schematic diagram of the structure of the gas heat pump of this utility model in one embodiment;
[0017] Figure 2 for Figure 1 A magnified view of a portion of region A in the middle;
[0018] Figure 3 This is a cross-sectional schematic diagram of a gas-fired heat pump according to one embodiment of the present invention;
[0019] Figure 4 for Figure 3 A magnified view of a portion of region B in the middle.
[0020] Component designation explanation:
[0021] 100. Heat pump body; 200. Exhaust pipe; 210. Mounting part; 220. First exhaust pipe; 230. Second exhaust pipe; 300. Second exhaust pipe; 300. Drain pipe; 310. Drain outlet; 320. First sleeve; 321. Clamping part; 330. Second sleeve; 331. Bottom wall; 332. Side wall; 400. Float ball. Detailed Implementation
[0022] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. It should also be understood that the terminology used in the embodiments of this utility model is for describing specific implementation schemes and not for limiting the scope of protection of this utility model. Test methods in the following embodiments that do not specify specific conditions are generally performed under conventional conditions or according to the conditions recommended by the respective manufacturers.
[0023] When numerical ranges are given in the embodiments, it should be understood that, unless otherwise specified in this invention, both endpoints of each numerical range and any value between the two endpoints may be selected. Unless otherwise defined, all technical and scientific terms used in this invention, as well as the prior art known to those skilled in the art and the description of this invention, may be implemented using any prior art methods, equipment, and materials similar to or equivalent to those in the embodiments of this invention.
[0024] It should be noted that the terms such as "upper", "lower", "left", "right", "middle" and "one" used in this specification are only for clarity of description and are not intended to limit the scope of implementation of this utility model. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered as within the scope of implementation of this utility model.
[0025] Please see Figures 1 to 4This utility model provides a gas heat pump, which includes a heat pump body 100, a flue pipe 200, a drain pipe 300, and a float 400. One end of the flue pipe 200 is connected to the flue outlet of the heat pump body 100, and the other end of the flue pipe 200 is open upwards. The drain pipe 300 is located at the lowest point of the flue pipe 200 to ensure that the condensate in the flue pipe 200 flows smoothly to the drain pipe 300 for easy drainage. The top of the drain pipe 300 is connected to the flue pipe 200, and a drain outlet 310 is provided at the bottom of the drain pipe 300. The float 400 is located inside the drain pipe 300 and is positioned above the drain outlet 310. The diameter of the float 400 is smaller than the height of the drain pipe 300, and the density of the float 400 is less than the density of water. When water vapor is discharged with the flue gas, condensate forms in the flue pipe 200 and flows into the drain pipe 300. When the condensate in the drain pipe 300 reaches a certain level, the float 400 floats up, and the condensate is discharged through the drain outlet 310 of the drain pipe 300. After that, the float 400 seals the drain outlet 310 again, which can prevent icing from occurring when the equipment is not running and prevent the accumulation of ice from affecting the operation of the entire system and the heating effect.
[0026] Please see Figure 2 and Figure 4 In one embodiment, the exhaust pipe 200 is provided with a mounting portion 210 for installing the drain pipe 300. The shape of the exhaust pipe 200 is not limited and can be adjusted according to actual needs. In this embodiment, the exhaust pipe 200 includes a first exhaust pipe 220 and a second exhaust pipe 230. The first exhaust pipe 220 is arranged horizontally, and the second exhaust pipe 230 is arranged vertically. One end of the first exhaust pipe 220 is connected to the exhaust port of the heat pump body 100, and the other end of the first exhaust pipe 220 is connected to the second exhaust pipe 230. The opening of the second exhaust pipe 230 faces upwards, and the mounting portion 210 is provided on the first exhaust pipe 220. For example, the first exhaust pipe 220 has an opening in its wall, and the mounting portion 210 is located around the outer edge of the opening. One end of the mounting portion 210 is fixedly connected to the first exhaust pipe 220, and the other end of the mounting portion 210 extends in a direction away from the first exhaust pipe 220. For example, the first exhaust pipe 220 and the mounting part 210 are integrally formed. In this embodiment, for ease of maintenance, the mounting part 210 and the drain pipe 300 are detachably connected. For instance, the mounting part 210 is provided with an internal thread, and the end of the drain pipe 300 connected to the mounting part 210 is provided with an external thread that matches the internal thread. The detachable connection between the mounting part 210 and the drain pipe 300 is achieved through a threaded connection. When the gas heat pump is not running, any water accumulated in the drain pipe 300 can be drained promptly.
[0027] Please see Figure 2 and Figure 4In one embodiment, the drain pipe 300 includes a first sleeve 320 and a second sleeve 330. One end of the first sleeve 320 is fixedly connected to the first exhaust pipe 220, and the other end of the first sleeve 320 is fixedly connected to the second sleeve 330. A drain outlet 310 is located at the bottom of the second sleeve 330. The size of the drain outlet 310 is not limited and can be adjusted according to actual needs. In this embodiment, for ease of maintenance, the first sleeve 320 and the second sleeve 330 are detachably connected. For example, the first sleeve 320 can be provided with an external thread, and the second sleeve 330 with an internal thread; alternatively, the first sleeve 320 can be provided with an internal thread, and the second sleeve 330 with an external thread. In this embodiment, the first sleeve 320 and the second sleeve 330 are configured such that the first sleeve 320 has an internal thread and the second sleeve 330 has an external thread to prevent impurities from entering the connection between the first sleeve 320 and the second sleeve 330. Furthermore, to enhance the sealing performance between the first sleeve 320 and the second sleeve 330 and prevent flue gas leakage, a sealing element is also provided between the first sleeve 320 and the second sleeve 330. The type of sealing element is not limited here, as long as it can withstand high temperatures and prevent flue gas leakage. For example, the sealing element can be a sealing ring, which is positioned between the first sleeve 320 and the second sleeve 330, with the first sleeve 320 and the second sleeve 330 pressing the sealing ring together to ensure an airtight connection between the first sleeve 320 and the second sleeve 330. Alternatively, the sealing element can also be a sealing tape, which is wrapped around the external thread of the second sleeve 330, and the first sleeve 320 and the second sleeve 330 are tightened to achieve a sealed connection between the first sleeve 320 and the second sleeve 330. The sealing tape can be, for example, a polytetrafluoroethylene (PTFE) sealing tape. In this embodiment, a clamping part 321 is provided at one end of the first sleeve 320 near the second sleeve 330, which is used to clamp the first sleeve 320 when the first sleeve 320 and the second sleeve 330 are tightened, thereby enhancing the stability of the first sleeve 320.
[0028] Please see Figure 2 and Figure 4In one embodiment, the diameter of the end of the first sleeve 320 connected to the mounting part 210 is smaller than the diameter of the end of the first sleeve 320 connected to the second sleeve 330. The smaller diameter of the end of the first sleeve 320 connected to the mounting part 210 makes installation and maintenance easier, while the larger diameter of the end of the first sleeve 320 connected to the second sleeve 330 allows it to cooperate with the second sleeve 330 to form a cavity for holding condensate. The second sleeve 330 includes a bottom wall 331 and a side wall 332 arranged circumferentially along the bottom wall 331, with a drain outlet 310 disposed on the bottom wall 331. In this application, the bottom wall 331 and the side wall 332 can be separate structures or integrally formed. In this embodiment, for example, the bottom wall 331 and the side wall 332 can be formed separately and then fixedly connected by welding or other connection methods, as long as a sealed connection is ensured between the bottom wall 331 and the side wall 332 to prevent leakage during smoke exhaust. In other embodiments, the bottom wall 331 and the side wall 332 can be integrally cast. Furthermore, along the radial direction of the bottom wall 331, the height of the bottom wall 331 around its perimeter is higher than the height of the drain outlet 310, ensuring that the float 400 floats up to drain the condensate and then re-seals above the drain outlet 310. When the ambient temperature is below 0°C, if there is a small amount of water in the exhaust pipe 200, causing ice blockage at the drain outlet 310, the high-temperature flue gas discharged from the heat pump body 100 can quickly melt the ice blockage and drain the condensate when the gas heat pump restarts. In this application, the exhaust pipe 200, drain pipe 300, and float 400 are all made of materials that are resistant to freezing and high temperatures and resistant to flue gas corrosion, such as stainless steel, to meet the operating range of the gas heat pump from -30°C to 260°C.
[0029] This utility model discloses a gas-fired heat pump with a drain pipe installed on the exhaust pipe. A drain outlet is located at the bottom of the drain pipe and is sealed by a float. When the heat pump body exhausts gas through the exhaust pipe, the pressure of the flue gas ensures the float remains sealed at the drain outlet. As the condensate content in the drain pipe increases, the float rises, and the condensate is discharged through the drain outlet, at which point the float re-seals the outlet. This ensures that condensate generated during the operation of the gas-fired heat pump is discharged promptly, preventing icing when the equipment is not running and preventing the accumulation of ice from affecting the operation and heating effect of the entire system. Furthermore, during seasons when the gas-fired heat pump is not in use, external water may enter the exhaust pipe against the direction of exhaust due to various circumstances. The float can discharge the water according to the amount, ensuring the safety of the gas-fired heat pump. Therefore, this utility model effectively overcomes some practical problems in the prior art, thus having high utilization value and practical significance.
[0030] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.
Claims
1. A gas-fired heat pump, characterized in that, include: Heat pump body (100); The exhaust pipe (200) has one end connected to the exhaust port of the heat pump body (100), and the other end is open upwards; A drain pipe (300) is provided at the lowest point of the exhaust pipe (200), the top of the drain pipe (300) is connected to the exhaust pipe (200), and a drain outlet (310) is provided at the bottom of the drain pipe (300). A float (400) is disposed inside the drain pipe (300), the float (400) is sealed above the drain outlet (310), the diameter of the float (400) is smaller than the height of the drain pipe (300) and the density of the float (400) is smaller than the density of water.
2. The gas heat pump according to claim 1, characterized in that, The exhaust pipe (200) is provided with a mounting part (210) for installing the drain pipe (300).
3. The gas heat pump according to claim 2, characterized in that, The mounting part (210) is detachably connected to the drain pipe (300).
4. The gas heat pump according to claim 2, characterized in that, The drain pipe (300) includes a first sleeve (320) and a second sleeve (330). One end of the first sleeve (320) is fixedly connected to the mounting part (210), and the other end is fixedly connected to the second sleeve (330). The drain outlet (310) is located at the bottom of the second sleeve (330).
5. The gas heat pump according to claim 4, characterized in that, The first sleeve (320) is threadedly connected to the second sleeve (330), and a sealing element is provided between the first sleeve (320) and the second sleeve (330).
6. The gas heat pump according to claim 4, characterized in that, The diameter of the end of the first sleeve (320) connected to the mounting part (210) is smaller than the diameter of the end of the first sleeve (320) connected to the second sleeve (330).
7. The gas heat pump according to claim 4, characterized in that, The second sleeve (330) includes a bottom wall (331) and a side wall (332) arranged circumferentially along the bottom wall (331), and the drain outlet (310) is arranged on the bottom wall (331).
8. The gas heat pump according to claim 4, characterized in that, The first sleeve (320) has a clamping part (321) at one end near the second sleeve (330).
9. The gas heat pump according to claim 7, characterized in that, The bottom wall (331) and the side wall (332) are either separate structures or integrally formed.
10. The gas heat pump according to claim 7, characterized in that, Along the radial direction of the bottom wall (331), the height of the perimeter of the bottom wall (331) is higher than the height of the drain outlet (310).