Charging tool for EHU refrigerating system
By designing a charging fixture for the EHU refrigeration system, and utilizing an inclined support port and an electronic weighing device, the problems of refrigerant waste and gas-liquid mixing during charging were solved, achieving refrigerant conservation and reliable charging.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGZHOU RAILWAY VEHICLE FACTORY
- Filing Date
- 2025-05-07
- Publication Date
- 2026-04-17
AI Technical Summary
Existing EHU refrigerant charging equipment leads to refrigerant waste and gas-liquid mixing during charging when no tooling is used, and charging failure may occur when the equipment sensor malfunctions.
An EHU refrigeration system charging fixture was designed, including a base, a weighing device, and a gas tank rack. The fixture uses an inclined support port to engage with the anti-vibration ring on the surface of the refrigerant tank, combined with an electronic weighing alarm function, to ensure the reliability and economy of refrigerant charging.
It achieves the economical use of refrigerant and avoids gas-liquid mixing during charging, and has a simple structure, reliable function, and low cost.
Smart Images
Figure CN224136148U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of refrigerant charging equipment technology, and in particular to a charging fixture for an EHU refrigeration system. Background Technology
[0002] Currently, the refrigerant tanks used for EHU refrigerant charging have a net weight of 380 kg and a tare weight of 233-274 kg. Without tooling, they can only be placed on the ground. Each refrigerant tank is filled to about 150 kg of remaining net weight before the refrigerant charging equipment alarms for insufficient refrigerant, preventing further charging and resulting in excessive refrigerant waste. Moreover, the entire process of controlling the condensation charging status relies on the refrigerant charging equipment. If the equipment's sensors malfunction, it may lead to the refrigerant being mixed with gas during charging.
[0003] Therefore, there is a need for a tooling that is simple and reliable in structure, low in cost, can save refrigerant, and avoids gas-liquid mixing during charging. Utility Model Content
[0004] The purpose of this invention is to provide an EHU refrigeration system charging fixture that effectively solves the problems mentioned in the background art.
[0005] To achieve the above objectives, the present invention adopts the following technical solution:
[0006] An EHU refrigeration system filling fixture includes a base, a weighing device, and a gas tank rack. The base, the weighing device, and the gas tank rack are stacked sequentially from bottom to top. The gas tank rack includes a support frame and a first support plate and a second support plate for jointly tilting and supporting the refrigerant tank. The top of the first support plate has a first support opening with its opening facing upwards, and the top of the second support plate has a second support opening with its opening facing upwards. The height of the first support opening is higher than the height of the second support opening.
[0007] Furthermore, the first support plate and the second support plate are distributed in parallel at intervals, and both the first support plate and the second support plate are distributed in the vertical direction.
[0008] Furthermore, the bottom of the first support plate is welded and fixedly connected to one end of the support frame, and the bottom of the second support plate is welded and fixedly connected to the other end of the support frame.
[0009] Furthermore, reinforcing ribs are welded and fixed between the first support plate and the support frame, and between the second support plate and the support frame.
[0010] Furthermore, both the first support opening and the second support opening are arc-shaped openings.
[0011] Furthermore, the base includes a horizontally distributed base plate and at least two first support tubes fixedly disposed below the base plate, wherein the first support tubes are arranged in parallel.
[0012] Furthermore, the bottom of the support frame is provided with at least two parallel second support tubes.
[0013] Furthermore, the support frame includes a rectangular frame structure formed by welding and splicing four third support tubes, and the rectangular frame structure is arranged horizontally.
[0014] Furthermore, the first support tube, the second support tube, and the third support tube are metal square tubes.
[0015] Furthermore, the weighing device is an electronic scale with a built-in alarm and reminder function.
[0016] Compared with the prior art, this utility model provides a charging fixture for an EHU refrigeration system, which has the following advantages:
[0017] This utility model uses a first support port and a second support port to engage with the annularly protruding anti-vibration rings on the surface of the refrigerant tank, thereby supporting the refrigerant tank in an inclined position. This allows for the discharge of more refrigerant, saving refrigerant and avoiding gas-liquid mixing during charging. It also features a simple structure, reliable function, and low cost. Attached Figure Description
[0018] 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 drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 This is a front view schematic diagram of the overall structure of this utility model;
[0020] Figure 2 This is a three-dimensional structural diagram of the gas tank rack;
[0021] Figure 3 This is a schematic diagram of the three-dimensional structure of the base;
[0022] Figure 4 This is a schematic diagram illustrating the use of this utility model.
[0023] Reference numerals: 1. Base; 11. Base plate; 12. First support pipe; 2. Weighing device; 21. Alarm; 3. Gas tank rack; 31. Support frame; 311. Third support pipe; 32. First support plate; 321. First support opening; 33. Second support plate; 331. Second support opening; 34. Reinforcing rib plate; 35. Second support pipe; 4. Refrigerant tank; 41. Anti-vibration ring. Detailed Implementation
[0024] The technical solution of this utility model will be clearly and completely described below through detailed embodiments and in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.
[0025] Please refer to Figures 1-4 This embodiment provides an EHU refrigeration system filling fixture, including a base 1, a weighing device 2, and a gas tank rack 3. The base 1, the weighing device 2, and the gas tank rack 3 are stacked sequentially from bottom to top. The gas tank rack 3 includes a support frame 31 and a first support plate 32 and a second support plate 33 for jointly tilting and supporting a refrigerant tank 4. The top of the first support plate 32 has a first support opening 321 with an upward-facing opening, and the top of the second support plate 33 has a second support opening 331 with an upward-facing opening. The height of the first support opening 321 is higher than the height of the second support opening 331. The upper and lower ends of the refrigerant tank 4 each have an annularly protruding anti-vibration ring 41. The first and second support openings can engage with the annularly protruding anti-vibration rings on the surface of the refrigerant tank, thereby supporting the refrigerant tank in an tilted posture without slippage. This allows for the dispensing of more refrigerant, saving refrigerant and avoiding gas-liquid mixing during filling. Furthermore, the fixture is simple in structure, reliable in function, and low in cost.
[0026] In some specific implementation methods, refer to Figure 1 , Figure 2 and Figure 4 The first support plate 32 and the second support plate 33 are parallel and spaced apart, and both are distributed vertically. Specifically, the bottom of the first support plate 32 is welded and fixedly connected to one end of the support frame 31, and the bottom of the second support plate 33 is welded and fixedly connected to the other end of the support frame 31. In this way, the overall structure has good strength and can prevent deformation.
[0027] As an improved implementation method, refer to Figure 1 , Figure 2 and Figure 4Reinforcing ribs 34 are welded and fixed between the first support plate 32 and the support frame 31, and between the second support plate 33 and the support frame 31. By adding reinforcing ribs, the overall strength of the gas tank frame can be enhanced, and it can support a fully loaded refrigerant tank without easily deforming.
[0028] Specifically, as an example, the reinforcing rib between the first support plate and the support frame is made of steel plate with a specification of 300mm*300mm*12mm, and the reinforcing rib between the second support plate and the support frame is made of steel plate with a specification of 140mm*140mm*12mm.
[0029] In some specific implementation methods, such as Figure 2 As shown, both the first support opening 321 and the second support opening 331 are arc-shaped openings, which can better fit the surface of the refrigerant tank for support.
[0030] Specifically, as an example, the first support plate is made of steel plate with dimensions of 1000mm*945mm*12mm, and the second support plate is made of steel plate with dimensions of 1000mm*500mm*12mm. The radius of the first support opening is 328.5mm, and the radius of the second support opening is 285mm. The vertical height difference between the bottom of the first support opening and the bottom of the second support opening is 402mm, and the horizontal distance between the bottom of the first support opening and the bottom of the second support opening is 1170mm. In this way, the central axis of the refrigerant tank placed on the gas tank rack forms an 18.8° tilt angle with the horizontal plane, which allows the refrigerant to flow out better and reduces refrigerant residue.
[0031] In some specific implementation methods, refer to Figure 1 , Figure 3 and Figure 4 The base 1 includes a horizontally distributed base plate 11 and at least two first support pipes 12 fixedly disposed below the base plate 11. The first support pipes 12 are arranged in parallel. This allows for easy forklift transport by utilizing the recessed space formed between the first support pipes, facilitating refrigerant charging at different workstations. As an example, three first support pipes 12 are provided below the base plate 11, evenly spaced.
[0032] In some specific implementation methods, refer to Figure 1 , Figure 2 and Figure 4 The support frame 31 includes a rectangular frame structure formed by welding and splicing four third support tubes 311, and the rectangular frame structure is arranged horizontally.
[0033] As an improved implementation method, refer to Figure 1 , Figure 2and Figure 4 The bottom of the support frame 31 is provided with at least two parallel second support tubes 35. The groove space formed between the second support tubes can be utilized to facilitate forklift transportation. As an example, there are two second support tubes 35 at the bottom of the support frame 31, which are fixed to both ends of the support frame 35 respectively.
[0034] In some specific implementation methods, refer to Figures 1-4 The first support tube 12, the second support tube 35, and the third support tube 311 are all made of metal square tubing. This ensures a safe and reliable structure.
[0035] Specifically, as an example, the first support pipe is a square steel pipe with a cross-sectional dimension of 170mm*80mm, a thickness of 4mm, and a length of 1020mm; the second support pipe is a square steel pipe with a cross-sectional dimension of 140mm*80mm, a thickness of 4mm, and a length of 1000mm; the third support pipe is a square steel pipe with a cross-sectional dimension of 140mm*80mm and a thickness of 4mm. The length of the square steel pipe serving as the long side of the support frame is 1170mm, and the length of the square steel pipe serving as the short side of the support frame is 1000mm. The base plate is a steel plate with a specification of 1530mm*1020mm*10mm.
[0036] In some specific implementation methods, refer to Figure 1 and Figure 4 The weighing device 2 is an electronic scale with a built-in alarm function, which can automatically weigh and alarm. Through the tare function, the net weight of the remaining refrigerant in the refrigerant tank is determined. The lower limit of the alarm can be set to 35kg. When the net weight is less than 35kg, the weighing device will issue an alarm and stop the refrigerant charging to avoid charging gaseous refrigerant.
[0037] As an example, the weighing device 2 is a weighbridge with an alarm 21.
[0038] When using, such as Figure 4 As shown, the refrigerant tank 4 is placed directly on the gas tank frame 3. The shock-absorbing ring 41 on the surface of the refrigerant tank 4 is supported by the first support port 321 and the second support port 331, so that the refrigerant tank 4 is positioned and fixed on the gas tank frame 3 in an inclined position, and the filling port of the refrigerant tank 4 is tilted downwards to facilitate the filling operation.
[0039] The above embodiments are merely illustrative of the concept and technical solution of this utility model, and are not intended to limit 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.
[0040] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. An EHU refrigerant system charging tool comprising a base, a weighing device and a gas cylinder holder, characterised in that, The base, the weighing device, and the gas tank rack are stacked sequentially from bottom to top. The gas tank rack includes a support frame and a first support plate and a second support plate for jointly tilting and supporting the refrigerant tank. The top of the first support plate has a first support opening with its opening facing upwards, and the top of the second support plate has a second support opening with its opening facing upwards. The height of the first support opening is higher than the height of the second support opening.
2. An EHU refrigeration system charging tool according to claim 1, wherein, The first support plate and the second support plate are distributed in parallel at intervals, and both the first support plate and the second support plate are distributed in the vertical direction.
3. An EHU refrigeration system charging tool according to claim 2, wherein, The bottom of the first support plate is welded and fixedly connected to one end of the support frame, and the bottom of the second support plate is welded and fixedly connected to the other end of the support frame.
4. An EHU refrigeration system charging tool according to claim 3, wherein, Reinforcing ribs are welded and fixed between the first support plate and the support frame, and between the second support plate and the support frame.
5. The EHU refrigeration system charging tool of claim 1, wherein, Both the first support opening and the second support opening are arc-shaped openings.
6. The EHU refrigeration system charging tool of claim 1, wherein, The base includes a horizontally distributed base plate and at least two first support tubes fixedly disposed below the base plate, wherein the first support tubes are arranged in parallel.
7. An EHU refrigeration system charging tool according to claim 6, wherein, The bottom of the support frame is provided with at least two parallel second support tubes.
8. An EHU refrigeration system charging tool according to claim 7, wherein, The support frame includes a rectangular frame structure formed by welding and splicing four third support tubes, and the rectangular frame structure is arranged horizontally.
9. An EHU refrigeration system charging tool according to claim 8, wherein, The first support tube, the second support tube, and the third support tube are metal square tubes.
10. The EHU refrigeration system charging tool of claim 1, wherein, The weighing device is an electronic scale with a built-in alarm function.