Column type expansion water tank suitable for positive displacement heat pump water heater

Abstract

The utility model provides a column type expansion water tank suitable for a volumetric heat pump water heater, a cylindrical capsule film is arranged in a column type shell formed by a main shell and a mounting base plate to form a water containing cavity and an air containing cavity of the expansion water tank, the bottom end of the main shell is provided with a placing plate and a placing opening, and the top end of the main shell is provided with an air conveying opening connected with an air inlet pipe. The ratio of the radius of the whole cross section to the height of the shell is 9: 160, and an infusion opening is formed in the mounting chassis; the cylindrical capsule membrane is provided with a water inlet connected with the liquid inlet pipe and a fixing leather membrane for fixing; according to the scheme, the expansion water tanks can be embedded in the redundant space generated by internally cutting the cylindrical water storage tank and the support outside the cylindrical water storage tank, and the number of the expansion water tanks can be flexibly adjusted according to requirements, so that the cylindrical water storage tank and the expansion water tanks can be integrated into a combined structure; the sealing performance of the water containing cavity and the air containing cavity is guaranteed, meanwhile, the requirement for the working space of the expansion water tank is met, longitudinal space is fully utilized, the overall size is reduced, transportation cost is reduced, and product competitiveness is improved.

Description

Technical Field

[0001] This utility model belongs to the field of expansion tank technology, specifically relating to a column-type expansion tank suitable for volumetric heat pump water heaters. Background Technology

[0002] Expansion tanks are crucial components in wall-hung boilers and HVAC systems. In heating systems, they serve to hold water and maintain pressure. Due to the thermal expansion and contraction of water in the heating system, the water volume increases as the system heats up. When there is nowhere to accommodate this expansion, the water pressure in the heating system rises, affecting normal operation. The expansion tank accommodates this expansion, reducing pressure fluctuations caused by water expansion. When the system leaks or cools down for any reason, the expansion tank replenishes the system with water. Therefore, the expansion tank is connected to the system... The expansion tank is often used as the system's pressure control point or constant pressure point, which ensures that the system does not run dry, overflow, or become overpressured, thus improving the safety and reliability of the system operation. At the same time, the expansion tank is often connected to the inlet of the water pump, and the pressure control function of the expansion tank provides a certain degree of protection for the water pump. In the relevant existing technologies, the expansion tank requires additional installation space in the heating system, and its own working space requirement is large enough, so it occupies a lot of building area, making the overall transportation cost of the heating system with the expansion tank high, and the subsequent installation flexibility is low.

[0003] In response to the aforementioned phenomena and problems, in-depth research was conducted, and a column-type expansion tank suitable for volumetric heat pump water heaters was proposed. The specially shaped shell is combined with a special internal cylindrical membrane to make full use of the longitudinal space to reduce the overall volume of the product, ensure the working space of the expansion tank, reduce transportation costs, and increase product competitiveness. Utility Model Content

[0004] To address the aforementioned problems, this utility model proposes a column-type expansion tank suitable for volumetric heat pump water heaters. It features a specially shaped shell with a unique internal cylindrical membrane, allowing it to be fully embedded within the redundant space created by the tangent between the cylindrical water tank and the support bracket that holds the tank in the heat pump product. This fully utilizes the longitudinal space to reduce the overall product volume, ensures sufficient working space for the expansion tank, lowers transportation costs, and increases product competitiveness.

[0005] To achieve the above objectives, this utility model provides a column-type expansion tank suitable for a storage-type heat pump water heater, which is installed around the cylindrical water storage tank of the storage-type heat pump water heater. Specifically, it includes a columnar shell, a cylindrical membrane, a liquid inlet pipe, and an air inlet pipe. The cylindrical membrane is disposed inside the columnar shell, and the space inside the cylindrical membrane is configured as a water-receiving cavity. The space between the columnar shell and the cylindrical membrane is configured as an air-receiving cavity. The liquid inlet pipe is connected to the water-receiving cavity, and the air inlet pipe is connected to the air-receiving cavity. The columnar shell includes a main shell and a mounting base. The main shell is generally elongated, with a cross-sectional area of ​​half... The ratio of diameter to shell height is at least 9:160. A mounting plate and a mounting opening are provided at the bottom of the device. The top of the device protrudes outward in an arc shape and has an air inlet connected to the air inlet pipe. The mounting base covers and is fixed to the bottom of the main shell, and a liquid inlet is provided corresponding to the mounting opening. One end of the cylindrical membrane has a water inlet, and two sets of fixing membranes are symmetrically arranged on both sides of the water inlet. The water inlet of the cylindrical membrane passes through the mounting opening, and the fixing membranes are clamped and fixed between the mounting plate and the mounting base. The liquid inlet pipe passes through the liquid inlet and connects to the water inlet.

[0006] Preferably, the mounting chassis is provided with fastening components, which are arranged in a circular array with the center of the mounting chassis as the center.

[0007] Preferably, the fastening assembly includes at least five sets of screw and nut combinations, with the bottom of each screw penetrating the mounting base and fixed to the mounting plate, and its top positioned on the outside of the mounting base, and the nut fixed to the top of the screw.

[0008] Preferably, the cylindrical membrane body is parallel to the cylindrical shell.

[0009] Preferably, the radius of the mounting chassis is the same as the cross-sectional radius of the main housing.

[0010] Preferably, both the cylindrical capsule and the fixing membrane are made of elastic material.

[0011] Preferably, a guide vane is provided at the water inlet.

[0012] Preferably, the air intake pipe is equipped with a one-way valve, and an air intake cover is also provided on its outer side.

[0013] Preferably, the outer surface of the inlet pipe is provided with mounting threads.

[0014] Preferably, the mounting chassis is configured as a flange.

[0015] Compared to existing technologies, the advantages of this utility model are as follows: This utility model provides a column-type expansion tank suitable for volumetric heat pump water heaters, applicable to volumetric heat pump water heaters with cylindrical storage tanks. A cylindrical membrane is installed inside the columnar shell to form a water-receiving cavity and a gas-receiving cavity. The columnar shell includes a slender main shell and a mounting base. The ratio of the overall cross-sectional radius to the shell height of the main shell is 9:160. A mounting plate and mounting opening are provided at the bottom end, and the top end is arc-shaped with a gas inlet connected to an air inlet pipe. The mounting base covers and fixes the bottom end of the main shell and has a liquid inlet corresponding to the mounting opening. The cylindrical membrane has a water inlet connected to the liquid inlet pipe and two sets of fixing membranes on both sides of the water inlet. The water inlet of the cylindrical membrane passes through the... The mounting port is secured between the mounting plate and the mounting base to ensure the sealing of the water and gas chambers. In this patented design, the expansion tank, which is integrally cylindrical, can be completely embedded within the redundant space created by the tangent between the cylindrical water tank and the support bracket holding the cylindrical water tank in the heat pump product. The number of expansion tanks around the cylindrical water tank can be adjusted according to the actual needs of the heat pump product, with a maximum of four expansion tanks. This integrates the cylindrical water tank and the expansion tank into a combined structure within the heat pump product. This combined structure not only fully utilizes the longitudinal space around the cylindrical water tank, meeting the working space requirements of the expansion tank, but also reduces the overall volume of the heat pump product, lowers transportation costs, and increases product competitiveness without affecting the overall function of the expansion tank. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a column-type expansion tank suitable for a volumetric heat pump water heater according to the present invention;

[0017] Figure 2 This is a schematic diagram of the present invention installed on a storage-type heat pump water heater.

[0018] In the diagram: 1-Main shell, 11-Hosting plate, 12-Hosting port, 13-Air inlet, 2-Mounting chassis, 21-Screw, 22-Nut, 23-Infusion port, 3-Cylindrical diaphragm, 31-Water inlet, 32-Guide plate, 33-Fixing diaphragm, 4-Infusion pipe, 5-Air inlet pipe, 51-One-way valve, 52-Air inlet cover, 61-Cylindrical water tank, 62-Bracket, 63-Pressure gauge, 64-Safety valve, 65-Upper mounting plate, 66-Lower mounting plate, 67-Spare column-type expansion tank, 68-Working column-type expansion tank. Detailed Implementation

[0019] To provide a more detailed description of this utility model, the following description is provided in conjunction with the accompanying drawings. It should be noted that the embodiments described below are merely some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0020] See Figure 1 This embodiment provides a column-type expansion tank suitable for a volumetric heat pump water heater, specifically including a column-type shell, a cylindrical membrane 3, an inlet pipe 4, and an air inlet pipe 5. The cylindrical membrane 3 is disposed inside the column-type shell, and the space inside the cylindrical membrane 3 is configured as a water-containing cavity. The space between the column-type shell and the cylindrical membrane 3 is configured as an air-containing cavity. The inlet pipe 4 is connected to the water-containing cavity, and the air inlet pipe 5 is connected to the air-containing cavity. In this embodiment, the air inlet pipe 5 is provided with a one-way valve 51, and an air inlet cover 52 is also provided on its outer side. The outer surface of the inlet pipe 4 is provided with installation threads.

[0021] The cylindrical housing includes a main housing 1 and a mounting base 2. The main housing 1 is generally elongated, with a cross-sectional radius to housing height ratio of at least 9:160 to ensure sufficient space for the water and air chambers. Its bottom end is provided with a mounting plate 11 and a mounting opening 12 on the mounting plate 11. Its top end is arc-shaped and protrudes outwards, with an air inlet 13 connecting to the air inlet pipe 5. The mounting base 2 covers and is fixed to the bottom end of the main housing 1, with a radius equal to the cross-sectional radius of the main housing 1. Its center position corresponds to the... An infusion port 23 is provided at the mounting port 12. Multiple sets of fastening components are arranged in a circular array around the infusion port 23 and centered on the infusion port 23. The fastening components are used to connect and fix the expansion tank and the cylindrical water storage tank 61. In this embodiment, the mounting base 2 is a flange. The fastening components include at least five sets of screws 21 and nuts 22. The bottom of each screw 21 passes through the flange and is fixed to the mounting plate 11. Its top is located on the outside of the flange. The nut 22 is fixed to the top of the screw 21.

[0022] The cylindrical membrane 3 is parallel to the cylindrical shell, with an inlet 31 at one end. The cylindrical membrane 3 is entirely disposed inside the cylindrical shell. The inlet 31 passes through the mounting port 12 and is located inside the infusion port 23. The infusion pipe 4 passes through the infusion port 23 and is connected to the inlet 31. A guide plate 32 is provided at the inlet 31 to reduce the impact of the water on the inner wall of the cylindrical membrane 3 when it enters. Two sets of fixing membranes 33 are symmetrically arranged on both sides of the inlet 31. The fixing membranes 33 are clamped and fixed between the mounting plate 11 and the mounting base 2 to ensure the stability of the cylindrical membrane 3 inside the cylindrical shell and to ensure the sealing of the water and air chambers. In this embodiment, both the cylindrical membrane 3 and the fixing membranes 33 are made of elastic material.

[0023] See Figure 1 and Figure 2 In a specific application scenario of a heating system, the cylindrical water storage tank 61 of a volumetric heat pump water heater is mounted on a bracket 62, on which a pressure gauge 63 and a safety valve 64 are installed. Four sets of mounting plates are installed within the space created by the internal tangency between the cylindrical water storage tank 61 and the bracket 62 that holds the tank. These mounting plates, including an upper mounting plate 65 and a lower mounting plate 66, are all fixed to the bracket 62. Four sets of column-type expansion tanks are installed on the four mounting plates according to actual needs. Each column-type expansion tank encloses the main shell 1 in an arc shape. The top is installed on the lower mounting plate 66, and the mounting chassis 2 is fixed to the upper mounting plate 65 by the fastening assembly. Among the four sets of column expansion tanks, two sets are spare column expansion tanks, and the other two sets are working column expansion tanks. The liquid inlet pipe 4 of the working column expansion tank passes through the upper mounting plate 65 and is connected to the cylindrical water storage tank 61, so as to smoothly realize the expansion tank to accommodate and compensate for the expansion of water in the heating system, help stabilize the water pressure in the system, and prevent the cylindrical water storage tank 61 from being damaged or leaking due to excessive water pressure.

[0024] In this embodiment, the above is merely an example and is not intended to limit the scope of protection of this application.

[0025] This utility model provides a column-type expansion tank suitable for volumetric heat pump water heaters, applicable to volumetric heat pump water heaters with cylindrical storage tanks. A cylindrical membrane is installed inside the columnar shell, forming a water-receiving cavity and a gas-receiving cavity. The columnar shell includes a slender main shell and a mounting base. The ratio of the overall cross-sectional radius to the shell height of the main shell is 9:160. A mounting plate and mounting opening are provided at the bottom end, and the top end is arc-shaped with a gas inlet connected to an air inlet pipe. The mounting base covers and is fixed to the bottom end of the main shell, and a liquid inlet is provided corresponding to the mounting opening. The cylindrical membrane has a water inlet connected to the liquid inlet pipe and two sets of fixing membranes on both sides of the water inlet. The water inlet of the cylindrical membrane passes through the mounting opening, and the fixing membranes... The expansion tank is clamped and fixed between the mounting plate and the mounting base to ensure the sealing of the water and gas containment chambers. In this patented solution, the expansion tank, which is integrally cylindrical, can be completely embedded in the redundant space created by the tangent between the cylindrical water tank and the bracket that holds the cylindrical water tank in the heat pump product. The number of expansion tanks around the cylindrical water tank can be adjusted according to the actual needs of the heat pump product, with a maximum of four expansion tanks. This allows the cylindrical water tank and the expansion tank to be integrated into a combined structure in the heat pump product. This combined structure not only makes full use of the longitudinal space around the cylindrical water tank and meets the working space requirements of the expansion tank, but also reduces the overall volume of the heat pump product, lowers transportation costs, and increases product competitiveness without affecting the overall function of the expansion tank.

[0026] The embodiments disclosed above are only for detailed description of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, simple improvements and changes made in accordance with the claims of the present utility model are still within the scope of protection of the present utility model.

[0027] The scope of protection of this utility model shall be determined by the defined scope. For those skilled in the art, various improvements and modifications can be made without departing from the spirit and scope of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

Claims

1. A column-type expansion tank suitable for a storage-type heat pump water heater, disposed around the cylindrical storage tank of the storage-type heat pump water heater, characterized in that, Specifically, it includes a cylindrical shell, a cylindrical membrane, a liquid inlet pipe, and an air inlet pipe. The cylindrical membrane is disposed inside the cylindrical shell, and the space inside the cylindrical membrane is configured as a water-containing cavity. The space between the cylindrical shell and the cylindrical membrane is configured as an air-containing cavity. The liquid inlet pipe is connected to the water-containing cavity, and the air inlet pipe is connected to the air-containing cavity. The cylindrical shell includes a main shell and a mounting base. The main shell is generally elongated, with a cross-sectional radius to shell height ratio of at least 9:

160. A mounting plate is provided at its bottom end. The mounting port on the mounting plate has an arc-shaped protrusion at its top and an air inlet connected to the air inlet pipe. The mounting base covers and is fixed to the bottom of the main housing, and has an inlet corresponding to the mounting port. One end of the cylindrical membrane has a water inlet, and two sets of fixing membranes are symmetrically arranged on both sides of the water inlet. The water inlet of the cylindrical membrane passes through the mounting port, and the fixing membranes are clamped and fixed between the mounting plate and the mounting base. The inlet pipe passes through the inlet and is connected to the water inlet.

2. A column-type expansion tank suitable for a volumetric heat pump water heater according to claim 1, characterized in that, The mounting chassis is provided with fastening components, which are arranged in a circular array with the center of the mounting chassis as the center.

3. A column-type expansion tank suitable for a volumetric heat pump water heater according to claim 2, characterized in that, The fastening assembly includes at least five sets of screw and nut combinations. The bottom of each screw passes through the mounting base and is fixed to the mounting plate, while its top is located on the outside of the mounting base. The nut is fixed to the top of the screw.

4. A column-type expansion tank suitable for a volumetric heat pump water heater according to claim 1, characterized in that, The cylindrical membrane body is parallel to the cylindrical shell.

5. A column-type expansion tank suitable for a volumetric heat pump water heater according to claim 1, characterized in that, The radius of the mounting chassis is the same as the cross-sectional radius of the main housing.

6. A column-type expansion tank suitable for a volumetric heat pump water heater according to claim 1, characterized in that, Both the cylindrical capsule and the fixed membrane are made of elastic material.

7. A column-type expansion tank suitable for a volumetric heat pump water heater according to claim 1, characterized in that, A guide vane is installed at the water inlet.

8. A column-type expansion tank suitable for a volumetric heat pump water heater according to claim 1, characterized in that, The air intake pipe is equipped with a one-way valve, and an air intake cover is also provided on its outer side.

9. A column-type expansion tank suitable for a volumetric heat pump water heater according to claim 1, characterized in that, The outer surface of the inlet pipe is provided with mounting threads.

10. A column-type expansion tank suitable for a volumetric heat pump water heater according to claim 1, characterized in that, The mounting chassis is configured as a flange.

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