Oil content electronic scale for cleaning refrigerant of automobile air conditioner

Abstract

The utility model relates to the technical field of instruments and meters, and discloses an oil content electronic scale for cleaning an automobile air conditioner refrigerant, which comprises a base and a top plate, a weighing mechanism is fixedly arranged at the lower part of the base, a bottom plate is fixedly arranged at the upper part of the base, and a supporting mechanism is arranged between the bottom plate and the top plate. A storage mechanism used for storing refrigerants and a separation mechanism used for separating the refrigerants and refrigerant oil are further arranged between the bottom plate and the top plate, the storage mechanism comprises a large cylinder and a small cylinder, the upper ends and the lower ends of the large cylinder and the small cylinder are fixedly connected with the bottom plate and the top plate respectively, and a communication mechanism is arranged between the large cylinder and the small cylinder. The communicating mechanism comprises a pipeline used for connecting the large cylinder and the small cylinder, a connector arranged on the top plate and a solenoid valve arranged on the bottom plate. The air conditioning system has the effect of separating the refrigerant from the refrigerant oil and decomposition products thereof, and the weighing mechanism is fixedly arranged on the lower portion of the base and used for weighing whether the refrigerant reaches the preset mass or not, so that the situation that the refrigerating effect of the air conditioning system is affected by too much or too little refrigerant is avoided.

Description

Technical Field

[0001] This utility model relates to the field of instrumentation technology, and in particular to an electronic scale for cleaning refrigerant in automotive air conditioning systems. Background Technology

[0002] The refrigerant in an automotive air conditioning system is the working medium used to achieve the refrigeration cycle. It transfers heat by absorbing heat through a change in state, namely vaporization, thereby reducing the temperature inside the vehicle. Since the refrigeration cycle is a physical phase change process, the refrigerant itself does not participate in chemical reactions and can theoretically be used in a long-term cycle.

[0003] The existing automotive air conditioning systems have the following problems with refrigerant during use: First, due to wear and tear and improper maintenance, the refrigerant may become mixed with refrigeration oil and its decomposition products during circulation. When refrigeration oil and its decomposition products circulate together with the refrigerant, it can lead to blockage of system pipes and deterioration of heat exchange efficiency. It may also cause deterioration of refrigerant cooling performance and the risk of chemical reactions. Second, the amount of refrigerant in the automotive air conditioning system is not the standard value, with problems of too much or too little. When there is too much refrigerant, the system pressure is too high, which may cause compressor overload and poor condenser heat dissipation, requiring the release of some refrigerant. When there is too little refrigerant, the cooling capacity of the automotive air conditioning system is insufficient, and the compressor may wear due to insufficient lubrication, requiring the addition of refrigerant to the standard amount. Therefore, the amount of refrigerant in the automotive air conditioning system must be controlled to the standard value before it enters the system. Utility Model Content

[0004] The purpose of this invention is to provide an electronic scale for cleaning refrigerant in automotive air conditioning systems. This scale separates refrigerant from refrigeration oil and their decomposition products. A weighing mechanism is fixedly installed at the bottom of the base to weigh whether the refrigerant has reached a preset mass, so as to avoid the refrigerant being too much or too little and affecting the cooling effect of the air conditioning system.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: an electronic scale for cleaning refrigerant in automotive air conditioning systems, comprising a base and a top plate, a weighing mechanism fixedly provided at the lower part of the base, a bottom plate fixedly provided at the upper part of the base, a support mechanism provided between the bottom plate and the top plate, a storage mechanism for storing refrigerant and a separation mechanism for separating refrigerant and refrigeration oil provided between the bottom plate and the top plate, the storage mechanism comprising a large cylinder and a small cylinder fixedly connected to the bottom plate and the top plate respectively at their upper and lower ends, a connecting mechanism provided between the large cylinder and the small cylinder, the connecting mechanism comprising a pipe for connecting the large cylinder and the small cylinder, a connector and a solenoid valve provided on the top plate and the bottom plate.

[0006] By adopting the above technical solution, the separation mechanism can separate the refrigeration oil and its decomposition products from the refrigerant, avoiding problems such as system pipeline blockage, deterioration of heat exchange efficiency, deterioration of refrigerant cooling performance, and chemical reaction risks caused by the co-circulation of refrigeration oil and its decomposition products with the refrigerant, thereby improving the performance and stability of the automotive air conditioning system.

[0007] The solenoid valve is installed in the connecting pipeline to control the flow direction and on / off of the refrigerant. The weighing mechanism is used to measure the weight of the refrigerant in the entire storage mechanism in real time to ensure that the refrigerant entering the car air conditioning system is the standard value, neither too much nor too little.

[0008] A further feature of this invention is that the weighing mechanism includes an electronic scale fixedly mounted on the lower part of the base, and the electronic scale has a built-in weighing sensor.

[0009] By adopting the above technical solution, the electronic scale can accurately measure the weight of the refrigerant in the entire storage mechanism. The built-in weighing sensor of the electronic scale provides a basis for controlling the opening and closing of the solenoid valve. The control circuit compares the real-time weight signal from the weighing sensor with the preset value, and outputs a control signal based on the comparison result to drive the solenoid valve to act, thereby achieving precise control of the refrigerant flow direction and on / off, and ensuring that the refrigerant entering the car air conditioning system reaches the preset quality.

[0010] A further feature of this invention is that the support mechanism includes a column whose two ends are fixedly connected to the bottom plate and the top plate, respectively.

[0011] By adopting the above technical solution, the pillars in the support mechanism play a role in supporting the bottom plate and the top plate, making the structure of the entire device more stable.

[0012] A further feature of this invention is that the separation mechanism includes a transmission rod disposed on the base plate where the large cylinder is located, and a cooling spiral tube is fixedly disposed on the transmission rod.

[0013] By adopting the above technical solution, due to the difference in physical properties between the refrigeration oil and its decomposition products and the refrigerant, the refrigeration oil and its decomposition products are more likely to condense and adhere to the cooling spiral tube during cooling, thereby achieving separation from the refrigerant.

[0014] The spiral tube design increases the contact area and contact time between the refrigerant and the cooling spiral tube, allowing the refrigerant to be cooled sufficiently. This, in turn, more effectively promotes the separation of the refrigeration oil and its decomposition products from the refrigerant. Compared with the ordinary straight tube structure, the separation effect is better, improving the efficiency of the entire separation process.

[0015] A further feature of this invention is that the pipeline passes sequentially through a dryer filter, a compressor, and a fan along the direction from the large cylinder to the small cylinder.

[0016] By adopting the above technical solution, the dryer filter, compressor and fan are arranged on the pipeline in a specific order to form a complete and efficient refrigeration process. The refrigerant first passes through the dryer filter to effectively remove moisture and solid impurities from the refrigerant, ensuring its purity and dryness. Then, it is pressurized and heated by the compressor to obtain a power source. Finally, it is cooled by the fan, making full preparations for entering the small cylinder and eventually entering the car air conditioning system.

[0017] A further feature of this invention is that the number of small tubes is 2.

[0018] By adopting the above technical solution and setting up two small cylinders, when one small cylinder malfunctions, leaks, or requires maintenance, the other small cylinder can still work normally, ensuring that the entire system can continuously provide treated refrigerant to the car air conditioning system and guarantee the normal operation of the car air conditioning system. The two small cylinders can be connected to different car air conditioning circuits or different areas, and the refrigerant can be distributed more flexibly according to actual needs. Moreover, the two small cylinders increase the storage and processing capacity of refrigerant compared to a single small cylinder.

[0019] The beneficial effects of this utility model are:

[0020] 1. The separation mechanism of this utility model can separate the refrigeration oil and its decomposition products from the refrigerant, avoiding problems such as system pipeline blockage caused by the co-circulation of refrigeration oil and its decomposition products with the refrigerant, and improving the performance and stability of the automotive air conditioning system.

[0021] 2. The electronic scale can accurately measure the weight of the refrigerant in the entire storage mechanism. The built-in weighing sensor of the electronic scale provides the basis for controlling the opening and closing of the solenoid valve. The control circuit compares the real-time weight signal from the weighing sensor with the preset value, and outputs a control signal based on the comparison result to drive the solenoid valve to achieve precise control of the refrigerant flow direction and on / off, ensuring that the refrigerant entering the car air conditioning system reaches the preset quality.

[0022] 3. The separation mechanism includes a cooling spiral tube. Due to the difference in physical properties between the refrigeration oil and its decomposition products and the refrigerant, the refrigeration oil and its decomposition products are more likely to condense and adhere to the cooling spiral tube during cooling, thereby achieving separation from the refrigerant.

[0023] 4. The spiral tube design increases the contact area and contact time between the refrigerant and the cooling spiral tube, allowing the refrigerant to be cooled sufficiently. This, in turn, more effectively promotes the separation of the refrigeration oil and its decomposition products from the refrigerant. Compared with the ordinary straight tube structure, the separation effect is better, improving the efficiency of the entire separation process. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments 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.

[0025] Figure 1 This is a schematic diagram of the overall structure of an electronic scale for cleaning refrigerant in automotive air conditioning systems, based on this utility model.

[0026] Figure 2 This is a schematic diagram of the overall structure of an electronic scale for cleaning refrigerant in automotive air conditioning systems, based on this utility model.

[0027] Figure 3 This is a top view of an electronic scale for cleaning refrigerant in automotive air conditioning systems, according to this utility model.

[0028] Figure 4 This is a schematic diagram of the structure of an electronic scale for cleaning refrigerant in automotive air conditioning systems, excluding the large and small cylinders.

[0029] Figure 5 This utility model relates to the connection diagram between the large and small cylinders of an electronic scale for cleaning refrigerant in automotive air conditioning systems.

[0030] Figure 6 This is a connection diagram of the system containing the electronic scale for cleaning refrigerant in automotive air conditioning, which is part of this utility model.

[0031] In the diagram, 1 is the base; 2 is the bottom plate; 3 is the top plate; 4 is the weighing mechanism; 41 is the electronic scale; 5 is the support mechanism; 51 is the support column; 6 is the storage mechanism; 61 is the large cylinder; 62 is the small cylinder; 7 is the separation mechanism; 71 is the conduction rod; 72 is the cooling spiral tube; 8 is the connecting mechanism; 81 is the pipe; 82 is the joint; 83 is the solenoid valve; 9 is the drying filter; 10 is the compressor; and 11 is the fan. Detailed Implementation

[0032] The technical solution of this utility model will now be clearly and completely described with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0033] The control method of this utility model is to control the device by manually starting and stopping the switch. The wiring diagram of the power element and the supply of power are common knowledge in the field. Since this utility model is mainly used to protect mechanical devices, the control method and wiring layout will not be explained in detail.

[0034] The control method of this utility model is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the field. Since this utility model is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail.

[0035] like Figures 1 to 3 As shown, this utility model provides an electronic scale 41 for cleaning refrigerant in automotive air conditioning systems. It includes a base 1 and a top plate 3. A weighing mechanism 4 is fixedly installed at the lower part of the base 1. A bottom plate 2 is fixedly installed at the upper part of the base 1. A support mechanism 5 is provided between the bottom plate 2 and the top plate 3. A storage mechanism 6 for storing refrigerant and a separation mechanism 7 for separating refrigerant and refrigeration oil are also provided between the bottom plate 2 and the top plate 3. The storage mechanism 6 includes a large cylinder 61 and a small cylinder 62, which are fixedly connected to the bottom plate 2 and the top plate 3 at their upper and lower ends, respectively. A connecting mechanism 8 is provided between the large cylinder 61 and the small cylinder 62. The connecting mechanism 8 includes a pipe 81 for connecting the large cylinder 61 and the small cylinder 62, a connector 82 provided on the top plate 3 and the bottom plate 2, and a solenoid valve 83.

[0036] Furthermore, the weighing mechanism 4 includes an electronic scale 41 fixedly installed at the bottom of the base 1, and the electronic scale 41 has a built-in weighing sensor.

[0037] Furthermore, the support mechanism 5 includes a column 51 that is fixedly connected at both ends to the bottom plate 2 and the top plate 3 respectively.

[0038] Furthermore, such as Figure 4 As shown, the separation mechanism 7 includes a transmission rod 71 set on the base plate 2 where the large cylinder 61 is located, and a cooling spiral tube 72 is fixedly set on the transmission rod 71.

[0039] Furthermore, such as Figures 5 to 6 As shown, pipe 81 passes through dryer filter 9, compressor 10 and fan 11 in sequence along the direction from large cylinder 61 to small cylinder 62.

[0040] Furthermore, the number of small tubes 62 is 2.

[0041] The separation mechanism 7 of this invention can separate the refrigeration oil and its decomposition products from the refrigerant, avoiding problems such as system pipeline blockage, deterioration of heat exchange efficiency, degradation of refrigerant cooling performance and chemical reaction risks caused by the co-circulation of refrigeration oil and its decomposition products with the refrigerant, thereby improving the performance and stability of the automotive air conditioning system.

[0042] Solenoid valve 83 is installed in the connecting pipeline to control the flow direction and on / off of refrigerant. Weighing mechanism 4 is used to measure the weight of refrigerant in the entire storage mechanism 6 in real time to ensure that the refrigerant entering the car air conditioning system is the standard value, neither too much nor too little. When calculating the mass of refrigerant in storage mechanism 6, a tare process is performed, subtracting the mass of the device itself. The weight of refrigeration oil and its decomposition products is very small, generally between 100g and 200g, and can be ignored when measuring the weight of refrigerant.

[0043] The electronic scale 41 has a built-in load cell that can accurately measure the weight of the refrigerant in the entire storage mechanism 6. The load cell converts the force acting on it into an electrical signal, which is then accurately displayed by the control circuit and display device of the electronic scale 41. A preset mass value for the refrigerant is pre-set in the control circuit of the electronic scale 41. The control circuit compares the real-time weight signal from the load cell with the preset value. When the real-time weight signal indicates that the refrigerant weight is lower than the preset value, the control circuit outputs an electrical pulse signal to the driver of the solenoid valve 83. Upon receiving the control signal, the driver of the solenoid valve 83 energizes the coil of the solenoid valve 83, generating a magnetic field that attracts the valve core to move. This opens the solenoid valve 83, allowing refrigerant to flow from the automotive air conditioning system into the storage mechanism 6, thus replenishing the refrigerant. If the mass of refrigerant introduced from the automotive air conditioning system is less than the preset value for re-entry into the system, the missing amount of refrigerant will be replenished from the outside. During the refrigerant replenishment process, the weighing sensor continuously monitors the weight of the refrigerant in real time. When the weight reaches the preset value, the control circuit stops outputting control signals, the coil of the solenoid valve 83 is de-energized, the magnetic field disappears, and the valve core returns to its initial position under the action of spring force or other reset mechanism, closing the solenoid valve 83 and stopping the refrigerant flow, thereby precisely controlling the amount of refrigerant. The refrigerant that reaches the preset value will be introduced into the air conditioning system through professional charging equipment.

[0044] The separation mechanism 7 is installed on the base plate 2 where the large cylinder 61 is located. The refrigerant enters the large cylinder 61 from the car air conditioning system through the connector 82. Due to the difference in physical properties between the refrigeration oil and its decomposition products and the refrigerant, the refrigeration oil and its decomposition products are more likely to condense and adhere to the cooling spiral tube 72 during cooling, thereby separating from the refrigerant. The separated refrigerant enters the small cylinder 62 from the large cylinder 61 through the pipeline. During the process of flowing from the large cylinder 61 to the small cylinder 62, the refrigerant will pass through the dryer filter 9, the compressor 10 and the fan 11 in sequence, forming a complete and efficient refrigeration process. The dryer filter 9 effectively removes moisture and solid impurities from the refrigerant, ensuring the purity and dryness of the refrigerant. Then, the compressor 10 pressurizes and heats the refrigerant to obtain a power source. Finally, the fan 11 dissipates heat, making full preparations for subsequent entry into the small cylinder 62 and finally into the car air conditioning system.

[0045] Meanwhile, this solution also includes two small cylinders 62. When one small cylinder 62 malfunctions, leaks, or requires maintenance, the other small cylinder 62 can still work normally, ensuring that the entire system can continuously provide treated refrigerant to the car air conditioning system and guarantee its normal operation. The two small cylinders 62 can be connected to different car air conditioning circuits or different areas, allowing for more flexible refrigerant distribution according to actual needs. Furthermore, the two small cylinders 62 increase the refrigerant storage and processing capacity compared to a single small cylinder 62.

[0046] The working process of the electronic scale 41 for cleaning automotive air conditioning refrigerant is as follows:

[0047] S1: Refrigerant Recovery: When it is necessary to process the refrigerant of the car air conditioning system, open the pipe joint 82 connecting the car air conditioning system and this device. The refrigerant enters the large cylinder 61 from the car air conditioning system through the joint 82. At this time, the solenoid valve 83 is in the closed state to prevent the refrigerant from flowing into the small cylinder 62.

[0048] S2: Separation of refrigeration oil and its decomposition products: After the refrigerant enters the large cylinder 61, the separation mechanism 7 starts to work, separating the refrigeration oil and its decomposition products from the refrigerant.

[0049] S3: Refrigerant handling process: The separated refrigerant flows from the large cylinder 61 to the small cylinder 62 through pipe 81. During the flow, the refrigerant passes through the dryer filter 9, compressor 10 and fan 11 in sequence.

[0050] S4: Refrigerant Weight Measurement and Control: The electronic scale 41 in the weighing mechanism 4 has a built-in load cell, which can accurately measure the weight of the refrigerant in the entire storage mechanism 6 (large cylinder 61 and small cylinder 62). In the control circuit of the electronic scale 41, a preset mass value of the refrigerant is preset. The control circuit will compare the real-time weight signal from the load cell with the preset value.

[0051] When the real-time weight signal shows that the refrigerant weight is lower than the preset value, the control circuit will output an electrical pulse signal to the driver of the solenoid valve 83. The solenoid valve 83 will open, allowing the refrigerant to flow from the car air conditioning system into the storage mechanism 6 to replenish the refrigerant. If the mass of refrigerant introduced from the car air conditioning system is less than the preset value for re-entering the car air conditioning system, the missing amount of refrigerant will be replenished from the outside.

[0052] During the refrigerant replenishment process, the weighing sensor continuously monitors the weight of the refrigerant in real time. When the weight reaches the preset value, the solenoid valve 83 closes, stopping the refrigerant flow and thus precisely controlling the amount of refrigerant.

[0053] S5: Refrigerant storage and distribution: Refrigerant that has reached the preset quality and has been treated is stored in two small cylinders 62. The two small cylinders 62 can be connected to different automotive air conditioning circuits or different areas respectively, allowing for more flexible distribution of refrigerant according to actual needs.

[0054] S6: Refrigerant Refill: When the automotive air conditioning system needs to be replenished with refrigerant, the refrigerant stored in the small cylinder 62, which has reached the preset quality and has been treated, is introduced into the automotive air conditioning system through professional charging equipment to complete the refrigerant refill process.

Claims

1. An electronic scale (41) for cleaning refrigerant in automotive air conditioning systems, comprising a base (1) and a top plate (3), characterized in that: A weighing mechanism (4) is fixedly provided at the lower part of the base (1), and a base plate (2) is fixedly provided at the upper part of the base (1). A support mechanism (5) is provided between the base plate (2) and the top plate (3). A storage mechanism (6) for storing refrigerant and a separation mechanism (7) for separating refrigerant and refrigeration oil are also provided between the base plate (2) and the top plate (3). The storage mechanism (6) includes a large cylinder (61) and a small cylinder (62) that are fixedly connected to the bottom plate (2) and the top plate (3) at their upper and lower ends, respectively. A communication mechanism (8) is provided between the large cylinder (61) and the small cylinder (62). The communication mechanism (8) includes a pipe (81) for connecting the large cylinder (61) and the small cylinder (62), a connector (82) provided on the top plate (3) and the bottom plate (2), and a solenoid valve (83).

2. The electronic scale (41) for cleaning automotive air conditioning refrigerant according to claim 1, characterized in that: The weighing mechanism (4) includes an electronic scale (41) fixedly installed at the bottom of the base (1), and the electronic scale (41) has a built-in weighing sensor.

3. The electronic scale (41) for cleaning automotive air conditioning refrigerant according to claim 1, characterized in that: The support mechanism (5) includes a column (51) that is fixedly connected at both ends to the bottom plate (2) and the top plate (3) respectively.

4. The electronic scale (41) for cleaning refrigerant in automotive air conditioning systems according to claim 1, characterized in that: The separation mechanism (7) includes a transmission rod (71) set on the base plate (2) where the large cylinder (61) is located, and a cooling spiral tube (72) is fixedly set on the transmission rod (71).

5. The electronic scale (41) for cleaning automotive air conditioning refrigerant according to claim 1, characterized in that: The pipe (81) passes through the dryer filter (9), compressor (10) and fan (11) in sequence from the large cylinder (61) to the small cylinder (62).

6. The electronic scale (41) for cleaning refrigerant in automotive air conditioning as described in claim 1, characterized in that: The number of the small tubes (62) is 2.

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