An air source heat pump ejection augmented enthalpy system oil return device

Abstract

The utility model discloses an air source heat pump air injection enthalpy increasing system oil return device relates to heat pump oil return technical field, including lower cylinder, the upper side of lower cylinder is covered with upper cylinder, and the side of upper cylinder and lower cylinder is close to each other respectively welded with flange, and the flange between two groups of upper and lower is connected through bolt, the outside of lower cylinder is equipped with fixed ring, and the upper side of fixed ring is covered with protective cover. The utility model discloses through being provided with fixed ring and protective cover, in the process that two groups of flanges are connected, through fixed ring and protective cover, two groups of flanges can be surrounded and protected with bolt together, thereby can effectively prevent that flange and bolt are eroded by air and rust, is provided with the connecting ring and the plug -in rod, in the process that two groups of flanges are connected, through the cooperation of connecting ring and plug -in rod, the vertical position of fixed ring can be adjusted, thereby can effectively increase the operation space of staff.

Description

Technical Field

[0001] This utility model relates to the field of heat pump oil return technology, and in particular to an oil return device for an air source heat pump jet enthalpy enhancement system. Background Technology

[0002] The vapor injection enthalpy enhancement system for air source heat pumps is a technology system that can improve the performance of air source heat pumps in low-temperature environments. The vapor injection enthalpy enhancement compressor is the core component of the system. During operation, all moving parts require good lubrication to reduce friction and wear. In order to ensure that there is sufficient lubricating oil in the compressor, an oil separator is needed to return the separated lubricating oil to the compressor. It returns to the compressor through a dedicated oil return pipeline, preventing lubricating oil from entering other parts of the system and causing adverse effects.

[0003] Currently, existing oil separators for oil return are divided into upper and lower cylinders to facilitate inspection and maintenance of internal components. These cylinders are connected by flanges and multiple sets of bolts. However, the flanges and bolts between the cylinders are directly exposed, making them susceptible to corrosion from moisture and oxygen in the air. This leads to rust and corrosion of the flanges and bolts. Rust also increases the friction between the bolts and nuts, making them difficult to loosen during disassembly and delaying maintenance. To address these issues, we propose an oil return device for an air-source heat pump vapor injection enthalpy enhancement system. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing an oil return device for an air source heat pump jet enthalpy enhancement system.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An oil return device for an air source heat pump jet enthalpy enhancement system includes a lower cylinder body, an upper cylinder body covering the upper cylinder body, and flanges welded to the sides of the upper and lower cylinder bodies that are close to each other. The upper and lower flanges are connected by bolts. A fixing ring is fitted on the outer side of the lower cylinder body, and a protective cover is covering the fixing ring. A slot is opened at the center of the front of the fixing ring, and a U-shaped rod is inserted into the slot. The top of the U-shaped rod is inserted into the protective cover, and a connecting groove adapted to the U-shaped rod is opened inside the protective cover.

[0007] Preferably, a connecting spring is laterally connected to the inner wall of the slot, and the other end of the connecting spring is connected to the end of the bottom of the U-shaped rod.

[0008] Preferably, the inner walls of the fixing ring and the protective cover are respectively glued with sealing rings, and the inner wall of the sealing ring is in close contact with the outer wall of the lower cylinder or the upper cylinder.

[0009] Preferably, the bottom end of the protective cover is connected to a rubber ring, and the inside of the fixing ring is provided with a sealing groove that matches the rubber ring.

[0010] Preferably, the bottom end of the fixing ring is connected to a connecting ring, and the connecting ring is movably sleeved on the outside of the lower cylinder. Insertion rods are symmetrically inserted inside the connecting ring, and the sides of the insertion rods that are close to each other are respectively connected to the connecting block. The outer wall of the lower cylinder is provided with positioning grooves that are adapted to the insertion rods.

[0011] Preferably, the inner wall of the connecting ring is connected to a strip slider, and the outer wall of the lower cylinder is provided with a strip groove that matches the strip slider.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. This device, equipped with a fixing ring and a protective cover, can surround and protect both flanges and bolts together during the connection process, effectively preventing the flanges and bolts from rusting due to air corrosion. This also facilitates the normal disassembly of bolts by the staff during subsequent maintenance, thereby effectively improving the maintenance efficiency of this device.

[0014] 2. This device, equipped with a connecting ring and an insertion rod, allows for adjustment of the vertical position of the fixing ring during the connection of two sets of flanges. This effectively increases the operator's working space and prevents the fixing ring from obstructing the operator from using bolts to connect the two sets of flanges. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the oil return device of an air source heat pump jet enthalpy enhancement system proposed in this utility model;

[0016] Figure 2 for Figure 1 A three-dimensional cross-sectional view of the upper cylinder and flange structure;

[0017] Figure 3 for Figure 1 A three-dimensional cross-sectional schematic diagram of the connecting ring and insertion rod structure in the middle;

[0018] Figure 4 for Figure 1 A three-dimensional cross-sectional diagram of the sealing ring and rubber ring structure.

[0019] In the diagram: 1. Lower cylinder; 2. Upper cylinder; 3. Flange; 4. Fixing ring; 5. Protective cover; 6. Groove; 7. Connecting spring; 8. U-shaped rod; 9. Rubber ring; 10. Sealing groove; 11. Sealing ring; 12. Connecting ring; 13. Insertion rod; 14. Connecting block; 15. Strip slider. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0021] Reference Figure 1-4 An oil return device for an air source heat pump jet enthalpy enhancement system includes a lower cylinder 1, with an upper cylinder 2 covering the upper cylinder 1. Flanges 3 are welded to the sides of the upper cylinder 2 and lower cylinder 1 that are close to each other. The upper and lower flanges 3 are connected by bolts. A fixing ring 4 is fitted on the outer side of the lower cylinder 1, and a protective cover 5 covers the upper part of the fixing ring 4. The bolt connection between the upper and lower flanges 3 is existing technology, and the oil return principle of the lower cylinder 1 and upper cylinder 2 is also existing technology, which will not be described in detail here. A slot 6 is opened at the center of the front of the fixing ring 4, and a U-shaped rod 8 is inserted into the slot 6. The top of the U-shaped rod 8 is inserted into the protective cover 5, and a connecting groove adapted to the U-shaped rod 8 is opened inside the protective cover 5. The connection operation between the fixing ring 4 and the protective cover 5 can be realized through the connecting groove opened inside the U-shaped rod 8 and the protective cover 5. The cooperation between the fixing ring 4 and the protective cover 5 can realize the protection operation of the upper and lower flanges 3.

[0022] Furthermore, refer to Figure 4 It can be seen that the inner wall of the slot 6 is horizontally connected with a connecting spring 7, and the other end of the connecting spring 7 is connected to the bottom end of the U-shaped rod 8. During use, the connection between the U-shaped rod 8 and the slot 6 can be realized through the connecting spring 7 connected inside the slot 6. The elasticity of the connecting spring 7 can effectively ensure the tightness of the U-shaped rod 8 inserted into the connecting groove inside the protective cover 5.

[0023] Furthermore, refer to Figure 4 It can be seen that the inner walls of the fixing ring 4 and the protective cover 5 are respectively glued with sealing rings 11, and the inner wall of the sealing ring 11 is in close contact with the outer wall of the lower cylinder 1 or the upper cylinder 2. The rubber sealing rings 11 glued to the inner walls of the fixing ring 4 and the protective cover 5 can effectively reduce the gap between the fixing ring 4 and the lower cylinder 1, as well as the gap between the protective cover 5 and the upper cylinder 2, thereby effectively ensuring the sealing performance of the fixing ring 4 and the protective cover 5 when covering the flange 3.

[0024] Furthermore, refer to Figure 3 and Figure 4 It can be seen that the bottom end of the protective cover 5 is connected to a rubber ring 9, and the inside of the fixing ring 4 is provided with a sealing groove 10 that matches the rubber ring 9. In use, the rubber ring 9 and the sealing groove 10, which are set by the U-shaped structure, can further ensure the sealing performance of the fixing ring 4 and the protective cover 5 when covering the flange 3.

[0025] Furthermore, refer to Figure 3 It can be seen that the bottom end of the fixing ring 4 is connected to the connecting ring 12, and the connecting ring 12 is movably sleeved on the outside of the lower cylinder 1. The connecting ring 12 is symmetrically inserted with insertion rods 13, and the sides of the insertion rods 13 that are close to each other are respectively connected to the connecting block 14. The outer wall of the lower cylinder 1 is provided with a positioning groove that matches the insertion rods 13. In use, the insertion rods 13, the connecting block 14 and the positioning groove on the outer wall of the lower cylinder 1 can meet the downward movement requirements of the fixing ring 4, thereby increasing the operating space of the workers and effectively preventing the fixing ring 4 from blocking the workers from disassembling and assembling the bolts between the flanges 3.

[0026] Furthermore, refer to Figure 2 It can be seen that the inner wall of the connecting ring 12 is connected to the strip slider 15, and the outer wall of the lower cylinder 1 is provided with a strip groove that matches the strip slider 15. During use, the vertical guidance of the fixing ring 4 can be achieved through the cooperation of the strip slider 15 and the strip groove, so as to ensure that the staff can smoothly insert the insertion rod 13 into the positioning groove opened on the outer wall of the lower cylinder 1.

[0027] Working principle: When using this utility model, the operator can first cover the top of the lower cylinder 1 with the upper cylinder 2 so that the flange 3 connected to the end of the lower cylinder 1 and the flange 3 connected to the end of the upper cylinder 2 abut against each other. At this time, the operator can insert the bolts into the holes inside the flange 3 in sequence to complete the installation connection between the lower cylinder 1 and the upper cylinder 2. After the connection is completed, the operator can push the fixing ring 4 up to drive the connecting ring 12 and the strip slider 15 to slide simultaneously. When the connecting ring 12 can no longer be pulled up, the operator can insert the insertion rod 13 into the inside of the connecting ring 12 in sequence and extend the inner side of the connecting ring 12 into the positioning groove opened on the outer wall of the lower cylinder 1, thereby realizing the limiting work of the connecting ring 12 and the fixing ring 4.

[0028] Then, the operator can put the protective cover 5 from the top of the upper cylinder 2 to the outside of the upper cylinder 2, and pull the U-shaped rod 8 laterally so that the protective cover 5 can continue to move down, and the bottom of the protective cover 5 can abut against the top of the fixing ring 4. Then the operator can stop pulling the U-shaped rod 8 so that its top can be forcefully inserted into the connecting groove opened inside the protective cover 5, thereby fixing the protective cover 5. When the device is in use, the cooperation between the fixing ring 4 and the protective cover 5 can achieve the protection of the flange 3 and each set of bolts. The above is the complete working principle of this utility model.

[0029] In this utility model, the installation, connection or setting methods of all the components mentioned above are common mechanical methods, and the specific structure, model and coefficient index of all the components are their own technologies. As long as they can achieve their beneficial effects, they can be implemented, so they will not be described in detail.

[0030] The above embodiments are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present utility model shall be considered equivalent substitutions and shall be included within the protection scope of the present utility model.

[0031] In this utility model, unless otherwise stated, directional terms such as "up, down, left, right, front, back, inside, outside, and vertical and horizontal" in the terminology only represent the orientation of the term in its conventional use or are common names understood by those skilled in the art, and should not be regarded as limitations on the term. At the same time, numerals such as "first," "second," and "third" do not represent specific quantities or orders, but are only used to distinguish names. Moreover, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a series of elements includes not only those elements, but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

Claims

1. An oil return device for an air source heat pump jet and enthalpy augmentation system, comprising a lower cylinder (1), characterized in that, The lower cylinder (1) is covered by an upper cylinder (2), and flanges (3) are welded to the sides of the upper cylinder (2) and the lower cylinder (1) respectively. The upper and lower flanges (3) are connected by bolts. A fixing ring (4) is fitted on the outside of the lower cylinder (1), and a protective cover (5) is covered on the top of the fixing ring (4). A slot (6) is opened at the center of the front of the fixing ring (4), and a U-shaped rod (8) is inserted into the slot (6). The top of the U-shaped rod (8) is inserted into the protective cover (5), and a connecting groove adapted to the U-shaped rod (8) is opened inside the protective cover (5).

2. The oil return device for an air source heat pump jet enthalpy enhancement system according to claim 1, characterized in that, The inner wall of the slot (6) is horizontally connected to a connecting spring (7), and the other end of the connecting spring (7) is connected to the bottom end of the U-shaped rod (8).

3. The oil return device for an air source heat pump jet enthalpy enhancement system according to claim 1, characterized in that, The inner walls of the fixing ring (4) and the protective cover (5) are respectively glued with sealing rings (11), and the inner wall of the sealing ring (11) and the outer wall of the lower cylinder (1) or the upper cylinder (2) are in close contact.

4. The oil return device for an air source heat pump jet enthalpy enhancement system according to claim 1, characterized in that, The bottom end of the protective cover (5) is connected to a rubber ring (9), and the inside of the fixing ring (4) is provided with a sealing groove (10) that is compatible with the rubber ring (9).

5. The oil return device for an air source heat pump jet enthalpy enhancement system according to claim 1, characterized in that, The bottom end of the fixed ring (4) is connected to a connecting ring (12), and the connecting ring (12) is movably sleeved on the outside of the lower cylinder (1). Insertion rods (13) are symmetrically inserted inside the connecting ring (12), and the sides of the insertion rods (13) that are close to each other are respectively connected to the connecting block (14). The outer wall of the lower cylinder (1) is provided with a positioning groove that is compatible with the insertion rods (13).

6. The oil return device for an air source heat pump jet enthalpy enhancement system according to claim 5, characterized in that, The inner wall of the connecting ring (12) is connected to a strip slider (15), and the outer wall of the lower cylinder (1) is provided with a strip groove that matches the strip slider (15).

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