A railway passenger car air conditioning unit refrigerant charging apparatus and system

Abstract

The utility model relates to refrigerant charging technical field especially relates to a railway passenger car air conditioning unit refrigerant charging equipment and system. Railway passenger car air conditioning unit refrigerant charging equipment includes: charging cabinet, explosion -proof box and control cabinet, and explosion -proof box sets up on the lateral wall of charging cabinet, sets up in the refrigerant storage jar, vacuum pump and weighing sensor in charging cabinet, and control cabinet includes control unit, sets up electric booster pump and integrated pipeline in explosion -proof box, and refrigerant storage jar is connected with integrated pipeline through refrigerant input pipeline, and integrated pipeline is connected with air conditioning unit through refrigerant output pipeline, integrated pipeline still connects with the vacuum pumping end of vacuum pump through the vacuum pumping pipeline, and refrigerant storage jar is located on weighing sensor, and weighing sensor is connected with control unit communication, the utility model technical scheme can realize the injection speed of improving refrigerant to air conditioning unit to and can realize the accurate control to the refrigerant amount needing injection.

Description

Technical Field

[0001] This utility model relates to the field of refrigerant charging technology, and in particular to a refrigerant charging device and system for railway passenger car air conditioning units. Background Technology

[0002] Currently, when refrigerant charging equipment in railway passenger cars injects refrigerant into air conditioning units, the equipment operates for a period of time before being manually stopped. This manual control of the amount of refrigerant injected into the air conditioning units makes accurate control of the refrigerant dosage impossible. Furthermore, the refrigerant charging speed is slow when injecting refrigerant into the air conditioning units.

[0003] Therefore, the refrigerant charging equipment currently used in railway passenger car air conditioning units in air-conditioned workshops cannot meet the requirements. Thus, there is an urgent need for a refrigerant charging device that can acquire the amount of refrigerant already charged in real time during the refrigerant injection process, in order to accurately control the amount of refrigerant to be injected, and to increase the refrigerant charging speed. Utility Model Content

[0004] To solve the above-mentioned technical problems, or at least partially solve them, this utility model provides a refrigerant charging device and system for railway passenger car air conditioning units. This system can increase the refrigerant injection speed into the air conditioning unit and can acquire the amount of refrigerant already charged in real time during the refrigerant injection process, thereby achieving accurate control of the amount of refrigerant to be injected.

[0005] In a first aspect, this utility model provides a refrigerant charging device for a railway passenger car air conditioning unit, comprising:

[0006] A filling cabinet, an explosion-proof box, and a control cabinet, wherein the explosion-proof box is installed on the side wall of the filling cabinet;

[0007] The charging cabinet is equipped with a refrigerant storage tank, a vacuum pump, and a weighing sensor. The control cabinet includes a control unit. The explosion-proof box is equipped with an electric booster pump and an integrated pipeline. The refrigerant storage tank is connected to the integrated pipeline via a refrigerant input pipeline. The integrated pipeline is connected to the air conditioning unit via a refrigerant output pipeline. The integrated pipeline is also connected to the vacuum pump's vacuum end via a vacuuming pipeline.

[0008] The refrigerant storage tank is located on the weighing sensor, and the weighing sensor is communicatively connected to the control unit; the electric booster pump is installed on the refrigerant input pipe, and electric valves are installed on both the refrigerant input pipe and the refrigerant output pipe;

[0009] The electric booster pump, the vacuum pump, and the opening end of the electric valve are all communicatively connected to the control unit.

[0010] In some embodiments, the refrigerant storage tank includes a first refrigerant storage tank and a second refrigerant storage tank, and the refrigerant input pipe includes a first pipe, a second pipe, and a third pipe;

[0011] The first refrigerant storage tank is connected to the third pipe through the first pipe, and the second refrigerant storage tank is connected to the third pipe through the second pipe;

[0012] The electric booster pump is installed on the third pipeline, the first pipeline is equipped with a first electric valve, and the second pipeline is equipped with a second electric valve.

[0013] The first electric valve and the second electric valve are located inside the explosion-proof box.

[0014] In some embodiments, a first exhaust valve is provided on the first pipe, and a second exhaust valve is provided on the second pipe;

[0015] The first exhaust valve is disposed between the first electric valve and the first refrigerant storage tank, and the second exhaust valve is disposed between the second electric valve and the second refrigerant storage tank;

[0016] The first exhaust valve and the second exhaust valve are located inside the explosion-proof box.

[0017] In some embodiments, a first shut-off valve is provided on the first pipeline, and a second shut-off valve is provided on the second pipeline;

[0018] The first shut-off valve and the second shut-off valve are located inside the filling cabinet.

[0019] In some embodiments, a third electric valve is provided on the vacuum pipe;

[0020] The opening end of the third electric valve is communicatively connected to the control unit.

[0021] In some embodiments, the refrigerant outlet pipe includes a fourth pipe and a fifth pipe;

[0022] A fourth electric valve is installed on the fourth pipe, and a fifth electric valve is installed on the fifth pipe.

[0023] In some embodiments, a pressure sensor is provided inside the explosion-proof enclosure and is installed on the integrated pipeline for detecting the pressure on the integrated pipeline; the pressure sensor is communicatively connected to the control unit.

[0024] In some embodiments, a filter is provided inside the filling cabinet, and the filter is connected to the output end of the vacuum pump.

[0025] In some embodiments, the control cabinet is provided with a display unit, and the display unit is communicatively connected to the control unit;

[0026] The display unit is used to display the charging parameters, which include the weight of refrigerant charged into the air conditioning unit by the charging cabinet.

[0027] Secondly, this utility model embodiment also provides a refrigerant charging system for railway passenger car air conditioning units, including the refrigerant charging equipment for railway passenger car air conditioning units as described in the first aspect.

[0028] The technical solution provided by this utility model has the following advantages compared with the prior art:

[0029] The refrigerant charging equipment for railway passenger car air conditioning units provided in this embodiment includes: a charging cabinet, an explosion-proof box, and a control cabinet. The explosion-proof box is installed on the side wall of the charging cabinet. The charging cabinet contains a refrigerant storage tank, a vacuum pump, and a weighing sensor. The control cabinet includes a control unit. The explosion-proof box contains an electric booster pump and an integrated pipeline. The refrigerant storage tank is connected to the integrated pipeline via a refrigerant input pipeline, and the integrated pipeline is connected to the air conditioning unit via a refrigerant output pipeline. The integrated pipeline is also connected to the vacuum pump's vacuum end via a vacuuming pipeline. The refrigerant storage tank is located on the weighing sensor, which is communicatively connected to the control unit. The electric booster pump is installed on the refrigerant input pipeline, and electric valves are installed on both the refrigerant input and refrigerant output pipelines. The electric booster pump, the vacuum pump, and the opening ends of the electric valves are all communicatively connected to the control unit. By utilizing a vacuum pump to evacuate the integrated piping, and combining this with an electric booster pump installed on the refrigerant input pipeline, the injection speed of refrigerant from the refrigerant storage tank into the air conditioning unit is improved when the refrigerant is input through the integrated piping. Furthermore, by installing a weighing sensor below the refrigerant storage tank, the sensor, acting as a weight measuring component, can obtain real-time data on the reduction in weight of the refrigerant storage tank, thereby enabling real-time monitoring of the amount of refrigerant injected into the air conditioning unit. Therefore, the refrigerant charging equipment for railway passenger car air conditioning units provided in this embodiment of the invention can improve the injection speed of refrigerant into the air conditioning unit and can obtain the amount of refrigerant already charged in real-time during the injection process, thereby achieving accurate control of the required amount of refrigerant injected. Attached Figure Description

[0030] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the present invention.

[0031] 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, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 A schematic diagram illustrating the working principle of a refrigerant charging device for a railway passenger car air conditioning unit, provided for an embodiment of this utility model;

[0033] Figure 2 A schematic diagram of the refrigerant charging equipment for a railway passenger car air conditioning unit provided in this embodiment of the present invention;

[0034] Figure 3 This is a schematic diagram of the internal structure of a filling cabinet provided in an embodiment of the present utility model.

[0035] Among them, 10. Filling cabinet; 101. Indicator panel; 102. Display component; 103. Alarm light; 11. Explosion-proof box; 12. Control cabinet; 13. Refrigerant storage tank; 131. First refrigerant storage tank; 132. Second refrigerant storage tank; 14. Vacuum pump; 15. Weighing sensor; 151. First weighing sensor; 152. Second weighing sensor; 16. Electric booster pump; 17. Integrated piping; 18. Refrigerant input pipe; 181. First pipe; 182. Second pipe; 183. Third pipe; 19. Refrigerant output pipe; 194. Fourth pipe; 195. Fifth pipe; 20. Air conditioning unit; 21. Electric valve; 211. First electric valve; 212. Second electric valve; 213. Third electric valve; 214. Fourth electric valve; 215. Fifth electric valve; 22. Vacuum pumping pipe; 23. First exhaust valve; 24. Second exhaust valve; 25. First shut-off valve; 26. Second shut-off valve; 27. Pressure sensor; 28. Filter; 29. ​​Display unit; 30. Cooling fan; 31. Communication cable. Detailed Implementation

[0036] To better understand the above-mentioned objectives, features, and advantages of this utility model, the solution of this utility model will be further described below. It should be noted that, unless otherwise specified, the embodiments of this utility model and the features thereof can be combined with each other.

[0037] Many specific details are set forth in the following description in order to provide a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some embodiments of the present invention, and not all embodiments.

[0038] The refrigerant charging equipment for railway passenger car air conditioning units provided in this embodiment utilizes a vacuum pump to evacuate the integrated pipeline. Combined with an electric booster pump installed on the refrigerant input pipeline, this increases the injection speed of refrigerant from the storage tank into the air conditioning unit as it is introduced through the integrated pipeline. Furthermore, a weighing sensor installed below the refrigerant storage tank allows for real-time monitoring of the refrigerant reduction in weight, enabling real-time control of the refrigerant injection amount. Therefore, the refrigerant charging equipment for railway passenger car air conditioning units provided in this embodiment can increase the refrigerant injection speed into the air conditioning unit and achieve real-time acquisition of the injected refrigerant amount during the injection process, thus enabling accurate control of the required refrigerant dosage.

[0039] The following description, in conjunction with the accompanying drawings, provides an exemplary description of the refrigerant charging equipment and system for railway passenger car air conditioning units provided in this utility model embodiment.

[0040] Figure 1 This is a schematic diagram illustrating the working principle of a refrigerant charging device for a railway passenger car air conditioning unit, provided in an embodiment of the present invention. Figure 2 This is a schematic diagram of the structure of a refrigerant charging device for a railway passenger car air conditioning unit, provided as an embodiment of the present invention. Figure 3 This is a schematic diagram of the internal structure of a filling cabinet provided in an embodiment of the present utility model.

[0041] like Figures 1 to 3 As shown, the refrigerant charging equipment for railway passenger car air conditioning units includes: a charging cabinet 10, an explosion-proof box 11, and a control cabinet 12. The explosion-proof box 11 is installed on the side wall of the charging cabinet 10. The charging cabinet 10 contains a refrigerant storage tank 13, a vacuum pump 14, and a weighing sensor 15. The control cabinet 12 includes a control unit (not shown in the figure). The explosion-proof box 11 contains an electric booster pump 16 and an integrated pipeline 17. The refrigerant storage tank 13 is connected to the integrated pipeline 17 via a refrigerant input pipeline 18, and the integrated pipeline 17 is connected to the air conditioning unit via a refrigerant output pipeline 19. The unit 20 is connected; the refrigerant storage tank 13 is located on the weighing sensor 15, and the weighing sensor 15 is communicatively connected to the control unit; the electric booster pump 16 is installed on the refrigerant input pipe 18, and the integrated pipe 17 is also connected to the vacuum pump 14 via the vacuum pipe 22; electric valves 21 are installed on both the refrigerant input pipe 18 and the refrigerant output pipe 19; the opening ends of the electric booster pump 16, the vacuum pump 14, and the electric valves 21 are all communicatively connected to the control unit, for example, via wireless communication.

[0042] The control unit is integrated in the control cabinet 12 (not shown in the figure), serving as the control hub of the control cabinet 12. The integrated piping 17 acts as a refrigerant transfer station. Specifically, the refrigerant in the refrigerant storage tank 13 is first introduced into the integrated piping 17, and then the refrigerant is transported to and from the air conditioning unit 20 through the integrated piping 17, thereby realizing the injection of refrigerant from the refrigerant storage tank 13 into the air conditioning unit 20.

[0043] An explosion-proof box 11 is separately installed on the side wall of the charging cabinet 10, facilitating maintenance in case of problems. The charging cabinet 10 and control cabinet 12 are separate for user convenience. Specifically, when the refrigerant charging equipment for the railway passenger car air conditioning unit is operating, a vacuum pump 14 is used to evacuate the integrated pipeline 17 by installing a vacuum pipe 22 on the integrated pipeline 17. After evacuation, combined with the electric booster pump 16 installed on the refrigerant input pipeline 18, the injection speed of refrigerant from the refrigerant storage tank 13 into the air conditioning unit 20 is increased when the refrigerant is input through the integrated pipeline 17. Therefore, this embodiment of the invention, by installing a vacuum pump 14 and an electric booster pump 16, facilitates increasing the injection speed of refrigerant from the refrigerant storage tank 13 into the air conditioning unit 20.

[0044] A weighing sensor 15 is installed below the refrigerant storage tank 13. As a weight measuring component, the weighing sensor 15 can obtain the current weight of the refrigerant storage tank 13 in real time. Combined with the initial weight of the refrigerant storage tank 13, the reduced weight of the refrigerant storage tank 13 can be obtained, which is the amount of refrigerant injected into the air conditioning unit 20 from the refrigerant storage tank 13.

[0045] Therefore, the control cabinet 12 can monitor the amount of refrigerant injected into the air conditioning unit 20 by the refrigerant storage tank 13 in real time. When the amount of refrigerant injected into the air conditioning unit 20 reaches the set amount, the control unit in the control cabinet 12 outputs a closing signal to the electric valve 21 installed on the refrigerant input pipe 18 and the refrigerant output pipe 19, thereby controlling the refrigerant storage tank 13 to stop injecting refrigerant into the air conditioning unit 20.

[0046] The refrigerant charging equipment for railway passenger car air conditioning units provided in this embodiment includes: a charging cabinet, an explosion-proof box, and a control cabinet. The explosion-proof box is installed on the side wall of the charging cabinet. The charging cabinet contains a refrigerant storage tank, a vacuum pump, and a weighing sensor. The control cabinet includes a control unit. The explosion-proof box contains an electric booster pump and an integrated pipeline. The refrigerant storage tank is connected to the integrated pipeline via a refrigerant input pipeline, and the integrated pipeline is connected to the air conditioning unit via a refrigerant output pipeline. The integrated pipeline is also connected to the vacuum pump's vacuum end via a vacuuming pipeline. The refrigerant storage tank is located on the weighing sensor, which is communicatively connected to the control unit. The electric booster pump is installed on the refrigerant input pipeline, and electric valves are installed on both the refrigerant input and refrigerant output pipelines. The electric booster pump, the vacuum pump, and the opening ends of the electric valves are all communicatively connected to the control unit. By utilizing a vacuum pump to evacuate the integrated piping, and combining this with an electric booster pump installed on the refrigerant input pipeline, the injection speed of refrigerant from the refrigerant storage tank into the air conditioning unit is improved when the refrigerant is input through the integrated piping. Furthermore, by installing a weighing sensor below the refrigerant storage tank, the sensor, acting as a weight measuring component, can obtain real-time data on the reduction in weight of the refrigerant storage tank, thereby enabling real-time monitoring of the amount of refrigerant injected into the air conditioning unit. Therefore, the refrigerant charging equipment for railway passenger car air conditioning units provided in this embodiment of the invention can improve the injection speed of refrigerant into the air conditioning unit and can obtain the amount of refrigerant already charged in real-time during the injection process, thereby achieving accurate control of the required amount of refrigerant injected.

[0047] In some embodiments, combined with Figures 1 to 3 The refrigerant storage tank 13 includes a first refrigerant storage tank 131 and a second refrigerant storage tank 132. The refrigerant input pipeline 18 includes a first pipeline 181, a second pipeline 182, and a third pipeline 183. The first refrigerant storage tank 131 is connected to the third pipeline 183 through the first pipeline 181, and the second refrigerant storage tank 132 is connected to the third pipeline 183 through the second pipeline 182. The electric booster pump 16 is installed on the third pipeline 183. A first electric valve 211 is installed on the first pipeline 181, and a second electric valve 212 is installed on the second pipeline 182. The first electric valve 211 and the second electric valve 212 are located inside the explosion-proof box 11.

[0048] Specifically, by setting up a first refrigerant storage tank 131 and a second refrigerant storage tank 132, a first weighing sensor 151 is correspondingly installed below the first refrigerant storage tank 131, and a second weighing sensor 152 is correspondingly installed below the second refrigerant storage tank 132. The first refrigerant storage tank 131 and the second refrigerant storage tank 132 can store different types of refrigerants respectively. For example, the first refrigerant storage tank 131 contains R22 refrigerant, and the second refrigerant storage tank 132 contains 407C refrigerant.

[0049] When the air conditioning unit 20 needs to be injected with R22 refrigerant, the first refrigerant storage tank 131 is connected in sequence through the first pipe 181, the third pipe 183 and the integrated pipe 17, thereby realizing the injection of refrigerant in the first refrigerant storage tank 131 into the air conditioning unit 20; when the air conditioning unit 20 needs to be injected with 407C refrigerant, the second refrigerant storage tank 13 is connected in sequence through the second pipe 182, the third pipe 183 and the integrated pipe 17, thereby realizing the injection of refrigerant in the second refrigerant storage tank 132 into the air conditioning unit 20.

[0050] The first electric valve 211 controls the flow of the first pipe 181, and the second electric valve 212 controls the flow of the second pipe 182. An electric booster pump 16 is installed on the third pipe 183. When the first refrigerant storage tank 13 injects refrigerant into the air conditioning unit 20, the electric booster pump 16 increases the injection speed of the first refrigerant storage tank 13 into the air conditioning unit 20; similarly, when the second refrigerant storage tank 13 injects refrigerant into the air conditioning unit 20, the electric booster pump 16 can also be used to increase the injection speed of the second refrigerant storage tank 13 into the air conditioning unit 20.

[0051] Therefore, by optimizing the pipeline design, this embodiment of the utility model only requires one electric booster pump 16 to meet the requirements, eliminating the need for multiple electric booster pumps 16, which helps to reduce design costs.

[0052] In some embodiments, continue as follows Figures 1 to 3 As shown, a first exhaust valve 23 is provided on the first pipe 181, and a second exhaust valve 24 is provided on the second pipe 182; the first exhaust valve 23 is located between the first electric valve 211 and the first refrigerant storage tank 13, and the second exhaust valve 24 is located between the second electric valve 212 and the second refrigerant storage tank 13; the first exhaust valve 23 and the second exhaust valve 24 are located inside the explosion-proof box 11.

[0053] Specifically, by installing a first vent valve 23 on the first pipe 181, gas can be released from the pipe between the first electric valve 211 and the first refrigerant storage tank 131 before the first refrigerant storage tank 131 injects refrigerant into the air conditioning unit 20. This prevents the formation of a "gas column" in the pipe that would hinder the refrigerant injection speed. Therefore, by installing the first vent valve 23, gas on the first pipe 181 can be released in a timely manner, ensuring unobstructed pipe flow.

[0054] Similarly, by installing a second vent valve 24 on the second pipe 182, gas in the pipe between the second electric valve 212 and the second refrigerant storage tank 132 can be released before the second refrigerant storage tank 132 injects refrigerant into the air conditioning unit 20. This prevents the formation of a "gas column" in the pipe that would hinder the refrigerant injection speed. Therefore, by installing the second vent valve 24, gas in the second pipe 182 can be released in a timely manner, ensuring unobstructed pipe flow.

[0055] For example, both the first exhaust valve 23 and the second exhaust valve 24 are manual three-way exhaust ball valves.

[0056] In some embodiments, continue as follows Figures 1 to 3 As shown, a first shut-off valve 25 is provided on the first pipe 181, and a second shut-off valve 26 is provided on the second pipe 182; the first shut-off valve 25 and the second shut-off valve 26 are located inside the filling cabinet 10.

[0057] The first shut-off valve 25 is located near the output end of the first refrigerant storage tank 131, and can serve as an output control switch for the first refrigerant storage tank 131. Specifically, when it is necessary to start the refrigerant output from the first refrigerant storage tank 131, the first shut-off valve 25 must be opened first. For example, the first shut-off valve 25 is a manual shut-off valve.

[0058] The second shut-off valve 26 is located near the output end of the second refrigerant storage tank 132, and can serve as an output control switch for the second refrigerant storage tank 132. Specifically, when it is necessary to start the refrigerant output from the second refrigerant storage tank 132, the second shut-off valve 26 must be opened first. For example, the second shut-off valve 26 is a manual shut-off valve.

[0059] In some embodiments, continue to combine Figures 1 to 3 A third electric valve 213 is provided on the vacuum pipe 22; the opening end of the third electric valve 213 is communicatively connected to the control unit.

[0060] Specifically, a third electric valve 213 is installed on the vacuum pipe 22, which can be used to control the flow of the vacuum pipe 22.

[0061] In some embodiments, continue to combine Figures 1 to 3 The refrigerant output pipe 19 includes a fourth pipe 194 and a fifth pipe 195; a fourth electric valve 214 is provided on the fourth pipe 194, and a fifth electric valve 215 is provided on the fifth pipe 195.

[0062] The fourth pipe 194 can be used as the high-pressure side refrigerant charging pipe of the air conditioning unit 20, and the fifth pipe 195 can be used as the low-pressure side refrigerant charging pipe of the air conditioning unit 20; or, the fourth pipe 194 can be used as the low-pressure side refrigerant charging pipe of the air conditioning unit 20, and the fifth pipe 195 can be used as the high-pressure side refrigerant charging pipe of the air conditioning unit 20.

[0063] Specifically, a fourth electric valve 214 is installed on the fourth pipe 194, which can control the conduction of the fourth pipe 194; a fifth electric valve 215 is installed on the fifth pipe 195, which can control the conduction of the fifth pipe 195.

[0064] In some embodiments, continue to combine Figures 1 to 3 The explosion-proof box 11 is equipped with a pressure sensor 27, which is installed on the integrated pipeline 17 and is used to detect the pressure on the integrated pipeline 17; the pressure sensor 27 is communicatively connected to the control unit.

[0065] Specifically, by installing a pressure sensor 27 on the integrated pipeline 17, the pressure in the integrated pipeline 17 can be detected in real time to prevent danger caused by excessive pressure in the integrated pipeline 17.

[0066] For example, when excessive pressure is detected on the integrated pipeline 17, the operating power of the electric booster pump 16 can be controlled to reduce the pressure on the integrated pipeline 17.

[0067] In some embodiments, such as Figure 3 As shown, the control cabinet 12 is equipped with a display unit 29, which is communicatively connected to the control unit; the display unit 29 is used to display charging parameters, including the weight of refrigerant charged by the charging cabinet 10 into the air conditioning unit 20.

[0068] The display unit 29 can be a display screen. Specifically, the amount of refrigerant injected into the air conditioning unit 20 from the refrigerant storage tank 13 by the control unit can be displayed through the display unit 29, allowing the user to easily check the weight of refrigerant being charged into the air conditioning unit 20 by the charging cabinet 10 at any time.

[0069] In addition, when the pressure detected by the pressure sensor 27 is output to the control unit, it can also be displayed through the display unit 29.

[0070] In some embodiments, such as Figure 1 As shown, a filter 28 is installed inside the filling cabinet 10, and the filter 28 is connected to the output end of the vacuum pump 14.

[0071] Specifically, when the vacuum pump 14 compresses the gas drawn in from inside the pump body and then discharges it, the discharged gas may contain impurities, which can be filtered out by setting a filter 28.

[0072] In some embodiments, such as Figure 1 As shown, a cooling fan 30 is installed on the side wall of the filling cabinet 10. Specifically, the cooling fan can dissipate the heat generated during the operation of the filling cabinet 10 to ensure the safe operation of the filling cabinet 10.

[0073] In some embodiments, such as Figure 1 As shown, the charging cabinet 10 includes an indicator panel 101, on which multiple display components 102 are provided. For example, when the refrigerant in the first refrigerant storage tank 13 is controlled to be injected into the air conditioning unit 20, the corresponding display component 102 on the indicator panel 101 displays the information, allowing the user to know that the first refrigerant storage tank 131 is currently injecting refrigerant into the air conditioning unit 20. Similarly, when the refrigerant in the second refrigerant storage tank 132 is controlled to be injected into the air conditioning unit 20, the corresponding display component 102 on the indicator panel 101 displays the information, allowing the user to know that the second refrigerant storage tank 132 is currently injecting refrigerant into the air conditioning unit 20. Likewise, when the vacuum pump 14 is operating, the corresponding display component 102 on the indicator panel 101 displays the information, allowing the user to know that the vacuum pump 14 is currently operating.

[0074] Continue as Figure 2 As shown, the control cabinet 12 and the filling cabinet 10 are connected by a communication cable 31 to enable communication between the indicator panel 101 and the control unit of the filling cabinet 10.

[0075] In some implementations, the filling cabinet 10 is also equipped with an alarm light 103, which provides audible and visual warnings when a safety risk occurs.

[0076] It should be noted that the power supply components in the refrigerant charging equipment of the above-mentioned railway passenger car air conditioning units, such as vacuum pumps and electric booster pumps, can be powered by circuits as needed, which will not be elaborated here.

[0077] Based on the above embodiments, this utility model also provides a refrigerant charging system for railway passenger car air conditioning units, including the refrigerant charging equipment for railway passenger car air conditioning units as described in the above embodiments, and therefore has the same or similar beneficial effects, which will not be repeated here.

[0078] 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 list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0079] The above description is merely a preferred embodiment of this utility model and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of this utility model is not limited to the specific combination of the above-described technical features, but also includes other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the aforementioned inventive concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features of the utility model in this utility model that have similar functions.

Claims

1. A refrigerant charging device for a railway passenger car air conditioning unit, characterized in that, include: A filling cabinet, an explosion-proof box, and a control cabinet, wherein the explosion-proof box is installed on the side wall of the filling cabinet; The charging cabinet is equipped with a refrigerant storage tank, a vacuum pump, and a weighing sensor. The control cabinet includes a control unit. The explosion-proof box is equipped with an electric booster pump and an integrated pipeline. The refrigerant storage tank is connected to the integrated pipeline through a refrigerant input pipeline. The integrated pipeline is connected to the air conditioning unit through a refrigerant output pipeline. The integrated pipeline is also connected to the vacuum pump's vacuum end through a vacuuming pipeline. The refrigerant storage tank is located on the weighing sensor, and the weighing sensor is communicatively connected to the control unit; the electric booster pump is installed on the refrigerant input pipe, and electric valves are installed on both the refrigerant input pipe and the refrigerant output pipe; The electric booster pump, the vacuum pump, and the opening end of the electric valve are all communicatively connected to the control unit.

2. The refrigerant charging equipment for railway passenger car air conditioning units according to claim 1, characterized in that, The refrigerant storage tank includes a first refrigerant storage tank and a second refrigerant storage tank, and the refrigerant input pipeline includes a first pipeline, a second pipeline, and a third pipeline; The first refrigerant storage tank is connected to the third pipe through the first pipe, and the second refrigerant storage tank is connected to the third pipe through the second pipe; The electric booster pump is installed on the third pipeline, the first pipeline is equipped with a first electric valve, and the second pipeline is equipped with a second electric valve. The first electric valve and the second electric valve are located inside the explosion-proof box.

3. The refrigerant charging equipment for railway passenger car air conditioning units according to claim 2, characterized in that, The first pipe is equipped with a first exhaust valve, and the second pipe is equipped with a second exhaust valve; The first exhaust valve is disposed between the first electric valve and the first refrigerant storage tank, and the second exhaust valve is disposed between the second electric valve and the second refrigerant storage tank; The first exhaust valve and the second exhaust valve are located inside the explosion-proof box.

4. The refrigerant charging equipment for railway passenger car air conditioning units according to claim 2, characterized in that, A first shut-off valve is installed on the first pipeline, and a second shut-off valve is installed on the second pipeline; The first shut-off valve and the second shut-off valve are located inside the filling cabinet.

5. The refrigerant charging equipment for railway passenger car air conditioning units according to claim 1, characterized in that, A third electric valve is installed on the vacuum pipe; The opening end of the third electric valve is communicatively connected to the control unit.

6. The refrigerant charging equipment for railway passenger car air conditioning units according to claim 1, characterized in that, The refrigerant output pipeline includes a fourth pipeline and a fifth pipeline; A fourth electric valve is installed on the fourth pipe, and a fifth electric valve is installed on the fifth pipe.

7. The refrigerant charging equipment for railway passenger car air conditioning units according to claim 1, characterized in that, The explosion-proof enclosure is equipped with a pressure sensor, which is installed on the integrated pipeline to detect the pressure on the integrated pipeline; the pressure sensor is communicatively connected to the control unit.

8. The refrigerant charging equipment for railway passenger car air conditioning units according to claim 1, characterized in that, The filling cabinet is equipped with a filter, which is connected to the output end of the vacuum pump.

9. The refrigerant charging equipment for railway passenger car air conditioning units according to claim 1, characterized in that, The control cabinet is equipped with a display unit, which is communicatively connected to the control unit. The display unit is used to display the charging parameters, which include the weight of refrigerant charged into the air conditioning unit by the charging cabinet.

10. A refrigerant charging system for a railway passenger car air conditioning unit, characterized in that, Includes the refrigerant charging equipment for railway passenger car air conditioning units as described in any one of claims 1-9.

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