Refrigerant filling machine

Abstract

The utility model provides a refrigerant filling machine to solve the problem that in the prior art, a large amount of manpower and time cost are consumed for achieving high-precision filling. The refrigerant filling machine comprises a booster pump, a storage tank, an electronic scale, a control system, a filling pipeline, a pressure sensor, a roller and a storage chip. The refrigerant filling machine is excellent in cost control, traditional complex assemblies are abandoned, the booster pump and the high-precision online electronic scale are combined, and the manufacturing, debugging and maintaining cost is reduced. The electronic scale monitors the weight in real time, the control system performs comparison operation, and the error of the filling amount is controlled within five thousandths. The whole filling process is automatically executed by a control system, and an operator only needs to simply set parameters and start operation to complete a refrigerant filling task. The outer wall of the storage tank is connected with an external power supply through the leakage protector, the power supply is automatically cut off during leakage, and the alarm sends out a signal during abnormity.

Description

Technical Field

[0001] This utility model relates to the field of refrigeration equipment technology, and in particular to a refrigerant charging machine. Background Technology

[0002] In the manufacturing and maintenance of refrigeration systems, the accuracy of refrigerant charging directly affects the performance and energy consumption of the refrigeration equipment.

[0003] Traditional refrigerant charging machines typically rely on complex flow metering devices, pressure sensors, and precision electronically controlled valves to achieve high-precision charging. These complex components are not only expensive to procure, but also require specialized technicians to perform precise calibrations based on different refrigerant characteristics, charging pressure, and flow requirements during the equipment assembly and commissioning phases, consuming significant manpower and time. Furthermore, over long-term use, wear and aging of components due to the complex structure increase the frequency of equipment maintenance, further raising operating costs. Utility Model Content

[0004] This invention addresses the problem of high manpower and time costs associated with achieving high-precision refrigerant filling in existing technologies by providing a refrigerant filling machine.

[0005] The technical solution adopted in this utility model is:

[0006] A refrigerant charging machine includes a booster pump, a storage tank, an electronic scale, a control system, and charging pipes, wherein:

[0007] The booster pump is connected to the storage tank;

[0008] The electronic scale is installed at the bottom of the storage tank; the storage tank is connected to the control system via a pipe.

[0009] The outer wall of the storage tank is connected to an external power supply via a leakage current protector. When the outer wall of the storage tank leaks current, the leakage current protector disconnects, cutting off the power supply from the external power supply to the refrigerant charging machine body.

[0010] The storage tank is equipped with a pressure sensor, which is used to detect the pressure inside the storage tank in real time. The pressure sensor is connected to the control system and sends the pressure inside the storage tank to the control system.

[0011] The control system is equipped with an alarm that emits an alarm signal when the pressure inside the storage tank is abnormal.

[0012] The communication interface of the control system is connected to the booster pump, the communication interface of the control system is connected to the electronic scale, and the control system is equipped with the filling pipeline.

[0013] Furthermore, the refrigerant charging machine also includes a base;

[0014] The electronic scale is mounted on the base;

[0015] The control system is also mounted on the base;

[0016] The base is equipped with casters to facilitate the movement of the refrigerant charging machine.

[0017] Furthermore, the booster pump is selected from the ULVAC ZB-1466 booster pump.

[0018] Furthermore, the storage tank shell is made of 304 stainless steel.

[0019] Furthermore, a pressure stabilizing tank is installed on the upper part of the storage tank, and the pressure stabilizing tank contains a pressure stabilizing bladder; the bottom of the pressure stabilizing tank is connected to the upper part of the storage tank, and the pressure stabilizing bladder extends from the upper part of the storage tank into the interior of the storage tank.

[0020] Furthermore, the gas storage material of the storage tank is fluororubber.

[0021] Furthermore, the electronic scale is an online electronic scale.

[0022] Furthermore, the online electronic scale is the Mellertoledo MT1260 online electronic scale with an accuracy of up to 0.5 grams.

[0023] Furthermore, the main control chip of the control system is an STM32F407 microprocessor; the STM32F407 microprocessor is connected to a Flash memory chip, which is used to record the time and duration of the pressure anomaly inside the storage tank.

[0024] Furthermore, the control system reserves multiple communication interfaces to facilitate future functional expansion.

[0025] The beneficial effects of this utility model are:

[0026] This utility model discloses a refrigerant charging machine with excellent cost control. It abandons traditional complex components, adopting a combination of a booster pump and a high-precision online electronic scale, simplifying the structure and reducing manufacturing, debugging, and maintenance costs, resulting in an overall cost reduction of over 50%. It boasts high charging accuracy; the electronic scale monitors the weight in real time, and the control system performs comparative calculations, controlling the charging error within 0.5%, ensuring stable performance and avoiding problems such as poor cooling effect and increased energy consumption. Operation is convenient; the entire charging process is automated by the control system. Operators only need to set parameters and start the operation to complete the refrigerant charging task, reducing the professional skills required of operators and improving work efficiency. Safety is paramount; the outer wall of the storage tank is connected to an external power supply via a leakage current protector, automatically cutting off the power in case of leakage. An internal pressure sensor monitors the pressure in real time, and an alarm sounds in case of abnormalities, ensuring safe use. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application 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 application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 Here is a structural diagram of a refrigerant charging machine;

[0029] Figure 2 Workflow diagram for the initialization phase of the refrigerant charging machine;

[0030] Figure 3 A flowchart illustrating the refrigerant charging process for a refrigerant charging machine. Detailed Implementation

[0031] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0032] The following disclosure provides many different embodiments or examples for implementing various structures of this invention. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of this invention.

[0033] The embodiments of the utility model will now be described in detail with reference to the accompanying drawings.

[0034] An embodiment discloses a refrigerant charging machine, which includes the following components: a booster pump 1, a storage tank 2, an electronic scale 3, a control system 5, a charging pipe 6, a base 7, a pressure sensor 9, and rollers 10. (See attached diagram) Figure 1 As shown.

[0035] The connection relationships of the above components are described below:

[0036] The booster pump 1 is connected to the storage tank 2; an electronic scale 3 is installed at the bottom of the storage tank 2; the storage tank 2 is connected to the control system 5 via a pipe; a leakage current protector is connected to the outer wall of the storage tank 2 through an external power supply. When there is a leakage current in the outer wall of the storage tank 2, the leakage current protector disconnects, cutting off the power supply from the external power supply to the refrigerant charging machine; a pressure sensor 9 is installed inside the storage tank 2, which is used to detect the internal pressure of the storage tank 2 in real time. The pressure sensor 9 is connected to the control system 5 and sends the internal pressure of the storage tank 2 to the control system 5; the control system 5 is equipped with an alarm, which sounds an alarm signal when the internal pressure of the storage tank 2 is abnormal; the communication interface of the control system 5 is connected to the booster pump 1, and the communication interface of the control system 5 is connected to the electronic scale 3. The control system 5 is equipped with a charging pipe 6. The electronic scale 3 is mounted on the base 7; the control system 5 is also mounted on the base 7; casters 10 are installed at the bottom of the base 7 to facilitate the movement of the refrigerant charging machine.

[0037] The following describes the selection and internal structure of the above components:

[0038] Booster pump 1 uses an ULVAC ZB-1466 booster pump, whose unique pump body structure and power drive design allow for flexible adjustment of output pressure within the range of 1-5MPa, adapting to the charging pressure requirements of various refrigerants. Through optimized connection piping and sealing design, it achieves seamless connection with storage tank 2, ensuring zero leakage and efficient transfer of refrigerant during the pressure boosting process.

[0039] The shell of storage tank 2 is made of 304 stainless steel. This ensures that it meets pressure resistance requirements while preventing chemical corrosion of the refrigerant. A pressure stabilizing tank 4 is installed at the top of storage tank 2. Inside pressure stabilizing tank 4 is a pressure stabilizing bladder 8 filled with nitrogen to stabilize the pressure. The bottom of pressure stabilizing tank 4 is connected to the top of storage tank 2, and the pressure stabilizing bladder 8 extends into the interior of storage tank 2 from the top. The gas storage material of storage tank 2 is fluororubber.

[0040] The electronic scale 3 uses the Meiletoledo MT1260 online electronic scale with an accuracy of up to 0.5 grams. This electronic scale 3 has the characteristics of fast response and stable data output, and can measure the weight changes of storage tank 2 and internal refrigerant in real time and accurately, and feed the weight data back to the control system 5 through a highly reliable data transmission line.

[0041] The main control chip of control system 5 is an STM32F407 microprocessor. This microprocessor integrates functional modules such as data acquisition, analysis and calculation, and logic control. Through programming settings, it can achieve automated control of operations such as starting and stopping the booster pump 1, opening and closing the filling channel, and data recording and processing. Control system 5 also reserves multiple communication interfaces, including SPI, I2C, CAN, and serial communication interfaces, to facilitate future functional expansion. The STM32F407 microprocessor is connected to a Flash memory chip, which is used to record the time and duration of pressure anomalies inside storage tank 2.

[0042] The following describes the working principle of the refrigerant charging machine:

[0043] The refrigerant charging machine initialization phase, as shown in the attached document. Figure 2 As shown, the operator inputs initial parameters through the control system 5, which then drives the booster pump 1 to start. The booster pump 1 draws refrigerant from an external storage source, compresses it to increase pressure, and then injects it into the storage tank 2. During this process, an online electronic scale monitors the weight of the storage tank 2 and the refrigerant in real time and transmits the data to the control system 5. When the weight reaches the preset initial value, the control system 5 automatically controls the booster pump 1 to stop working, completing the refrigerant pre-storage and initial weight recording.

[0044] When starting the filling operation, as shown in the attached document. Figure 3 As shown, the operator sets the required refrigerant charge amount for the equipment to be charged in the control system 5. Upon receiving the command, the control system 5 opens the charging channel. Under its own pressure, the refrigerant in storage tank 2 flows sequentially through the pipes connecting storage tank 2 and control system 5, through control system 5, and through charging pipe 6 into the equipment to be charged. Simultaneously, an online electronic scale continuously monitors the weight of storage tank 2 and the refrigerant, transmitting real-time weight data to control system 5 at millisecond-level frequencies. Control system 5 compares the preset charge amount with the real-time weight data. When the decrease in the weight of storage tank 2 and the refrigerant reaches the set charge amount, it quickly issues a command to close the solenoid valve on the charging channel, terminating the refrigerant charging process and achieving precise charging.

[0045] Pressure sensor 9 sends the internal pressure of storage tank 2 to the STM32F407 microprocessor. When the internal pressure of storage tank 2 is abnormal, the alarm will sound. The STM32F407 microprocessor is connected to a Flash memory chip. The STM32F407 microprocessor sends the time and duration of the pressure abnormality inside storage tank 2 to the Flash memory chip. The Flash memory chip records the time and duration of the pressure abnormality inside storage tank 2, which is convenient for staff to check, maintain and repair.

[0046] In another embodiment, a refrigeration equipment company introduced the refrigerant charging machine of this utility model to perform refrigerant charging and maintenance operations on various commercial air conditioners. First, technicians charge the refrigerant into the storage tank 2 via a booster pump 1, and an online electronic scale accurately measures and records the initial weight. Then, the charging pipe 6 of the charging machine is properly connected to the refrigerant charging interface of the air conditioner to be repaired. The refrigerant charging amount is accurately set in the control system 5 according to the air conditioner model and repair requirements. After starting the charging machine, the refrigerant is quickly and stably charged into the air conditioning system. The online electronic scale monitors the changes in the weight of the storage tank 2 and the refrigerant in real time and transmits the data to the control system 5 promptly. When the charging amount reaches the set value, the control system 5 instantly closes the charging channel, completing the refrigerant charging of one air conditioner. After charging tests on multiple air conditioners of different brands and models, the charging amount error was controlled within 0.5%, fully meeting the accuracy standards for air conditioner repair. Meanwhile, during a month of intensive use, the refrigerant charging machine operated stably, requiring only routine cleaning and simple component checks and maintenance, without any downtime due to malfunctions. Compared to the traditional refrigerant charging machine previously used by the company, the new equipment reduced procurement costs by approximately 65% ​​and maintenance costs by approximately 72%, significantly improving the company's maintenance efficiency and economic benefits.

[0047] It should be noted that the above embodiments are only some typical application scenarios of this utility model. Those skilled in the art can flexibly adjust and optimize the equipment structure, component selection, control algorithm, etc. according to actual needs without departing from the core principle of this utility model. These improvements and modifications should all be considered within the protection scope of this utility model.

[0048] The refrigerant charging machine disclosed in this embodiment has significant advantages. Its cost control is excellent; it abandons traditional complex components, adopting a combination of a booster pump 1 and a high-precision online electronic scale, simplifying the structure and reducing manufacturing, debugging, and maintenance costs, resulting in an overall cost reduction of over 50%. It boasts high charging accuracy; the electronic scale monitors the weight in real time, and the control system 5 performs comparative calculations, controlling the charging error within 0.5%, meeting the stringent requirements of refrigeration equipment, ensuring stable performance, and avoiding problems such as poor cooling effect and increased energy consumption. Operation is convenient; the entire charging process is automatically executed by the control system 5. Operators only need to set parameters and start the operation to complete the refrigerant charging task, reducing the professional skills required of operators and improving work efficiency. Safety is strong; the outer wall of the storage tank 2 is connected to an external power supply through a leakage current protector, automatically cutting off the power in case of leakage. The internally installed pressure sensor 9 can monitor the pressure in real time, and an alarm signal is issued in case of abnormality, ensuring safe use. In practical applications, the refrigerant charging machine operates stably. After charging tests on multiple air conditioners, the charging volume error is small. It has not experienced any malfunctions or shutdowns during a month of intensive use. Moreover, the procurement and maintenance costs are low, which greatly improves the company's maintenance efficiency and economic benefits.

Claims

1. A refrigerant charging machine comprising a booster pump, a storage tank, an electronic scale, a control system, and a charging pipeline, characterized by, Wherein: The booster pump is connected with the storage tank; The electronic scale is installed at the bottom of the storage tank; the storage tank is connected with the control system through a pipeline; The outer wall of the storage tank is connected with an electric leakage protector between the outer wall and an external power supply; when the outer wall of the storage tank leaks electricity, the electric leakage protector is disconnected, cutting off the power supply of the external power supply to the body of the refrigerant charging machine; The pressure sensor is installed inside the storage tank, which is used to detect the pressure inside the storage tank in real time; the pressure sensor is connected with the control system, and the pressure sensor sends the pressure inside the storage tank to the control system; The control system is installed with an alarm, which sends an alarm signal when the pressure inside the storage tank is abnormal; The communication interface of the control system is connected with the booster pump, and the communication interface of the control system is connected with the electronic scale; the control system is installed with the charging pipeline.

2. The refrigerant charging apparatus according to claim 1, characterized by It also includes a base; The electronic scale is installed on the base; The control system is also installed on the base; The base is installed with a roller at the lower part, which facilitates the movement of the body of the refrigerant charging machine.

3. The refrigerant charging apparatus according to claim 1, wherein The booster pump is selected as Aifake ZB-1466 booster pump.

4. The refrigerant charger according to claim 1, characterized by The shell of the storage tank is made of 304 stainless steel.

5. The refrigerant charger according to claim 1, characterized by The storage tank is installed with a pressure stabilizing tank at the upper part, which contains a pressure stabilizing bladder; the bottom of the pressure stabilizing tank is communicated with the upper part of the storage tank, and the pressure stabilizing bladder extends into the inside of the storage tank from the upper part of the storage tank.

6. The refrigerant charger according to claim 1, characterized by The gas storage material of the storage tank is fluorine rubber.

7. The refrigerant charger according to claim 1, characterized by The electronic scale is an online electronic scale.

8. The refrigerant charger according to claim 7, characterized by The online electronic scale is selected as an online electronic scale with an accuracy of 0.5 grams.

9. The refrigerant charger according to claim 1, characterized by The main control chip of the control system is STM32F407 microprocessor; the STM32F407 microprocessor is connected with a Flash memory chip, which is used to record the time and duration of the pressure abnormality inside the storage tank.

10. The refrigerant charging apparatus according to any one of claims 1 to 9, characterized by The control system reserves multiple communication interfaces to facilitate subsequent expansion of functions.

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