CN204612789U - A kind of wireless large discharge coolant charging scale able to programme - Google Patents

Abstract

The utility model discloses a wireless high-flow programmable refrigerant filling scale, which relates to the field of weighing equipment. Including the weighing pan and the controller for wireless communication with the weighing pan, there are main control circuit boards, key switch circuit boards, weight sensors, solenoid valves and battery packs for power supply inside the weighing pan, and a control chip on the main control circuit board , wireless information receiving and transmitting device, solenoid valve interface, sensor interface and key switch interface, the solenoid valve is connected to the solenoid valve interface through the solenoid valve connector, the weight sensor is connected to the sensor interface through the sensor connector, and the button switch circuit board is connected to the button switch connector Connected to the key switch interface, the weighing pan is provided with a display screen and a sound hole, and the sound and light alarm device on the main control circuit board can feed back the sound and light alarm signal on the display screen. The utility model can be programmed to set the weight of the refrigerant to be added, and when the given set value is reached, the electromagnetic valve is automatically closed to stop the refrigerant filling, so as to realize safe and convenient refrigerant filling.

Description

A wireless high-flow programmable refrigerant filling scale

technical field

The utility model relates to the field of weighing equipment, in particular to a wireless large-flow programmable refrigerant filling scale which can realize safe and convenient filling of refrigerant and realize wireless data communication with a control instrument.

Background technique

Before a new air conditioner leaves the factory, it is usually necessary to add a certain amount of refrigeration oil and refrigerant to the interior of the air conditioner. If manual filling is used, it is very time-consuming and laborious, and the weight of the filling is not easy to control. In order to avoid large errors in manual filling, some filling machines for automatic filling of refrigerant have appeared on the market, which have replaced pure manual filling to a certain extent. However, there are still several major problems in the fine control:

1. It is impossible to automatically add the refrigerant weight according to the set value, so it is inconvenient to have a special person to take care of the change of the weight value during the filling work, and the problem of inaccurate filling is also caused by human factors;

2. The electronic scales on the existing market do not have their own solenoid valves, and they often use 220V AC to drive the solenoid valves, which makes it inconvenient to maintain and refill the air conditioner;

3. The weighing pan and control instruments on the market are often connected by wires, which may easily cause the wires to touch the weighing pan, so there is a risk of inaccurate refrigerant filling;

Utility model content

In order to solve the defects of the above-mentioned technologies, the utility model provides a wireless high-flow programmable refrigerant filling scale that can realize safe and convenient filling of refrigerant and realize wireless data communication with control instruments.

The technical scheme adopted by the utility model to realize above-mentioned technical effect is:

A wireless high-flow programmable refrigerant filling scale, including a weighing pan and a controller connected by wireless communication, the weighing pan is provided with a CPU processor, and the CPU processor is unidirectionally connected with a power management module, a key input module, Weight sensor, solenoid valve control module and sound and light alarm module, CPU processor is bidirectionally connected with a wireless transceiver, said controller is provided with CPU processor, and the CPU processor is unidirectionally connected with power management module, key input module, A liquid crystal display module and an acousto-optic alarm module, the CPU processor of the controller is bidirectionally connected with a wireless transceiver, and the solenoid valve control module is used to control the solenoid valve to work under pulse current to perform pulse opening and closing.

In the above-mentioned wireless high-flow programmable refrigerant filling scale, the solenoid valve is a pulse solenoid valve, including an upper valve body and a lower valve body, and the upper valve body is provided with a magnet and is sleeved on the magnet The upper coil, the lower valve body is provided with a spool, the upper end of the spool is inserted into the coil, and the lower end of the spool falls into the lower valve body to prevent the liquid from entering the lower valve body. The opening and closing control of the port and the liquid outlet.

In the aforementioned wireless high-flow programmable refrigerant filling scale, the weighing pan includes a scale body composed of an upper weighing pan and a lower weighing pan, and the inside of the scale body is provided with a main control circuit board, a key switch circuit board, a weight Sensors, solenoid valves, and battery packs for power supply. The main control circuit board is provided with a control chip, solenoid valve interface, sensor interface, and key switch interface. The solenoid valve is connected to the solenoid valve interface through a solenoid valve connector. Above, the weight sensor is connected to the sensor interface through the sensor joint, and the key switch circuit board is connected to the key switch interface through the key switch joint.

In the above-mentioned wireless large-flow programmable refrigerant filling scale, the upper weighing pan is provided with a display screen and a sound hole, and the main control circuit board is also provided with a sound and light alarm signal that can be fed back on the display screen. Sound and light alarm device.

In the aforementioned wireless high-flow programmable refrigerant filling scale, the battery pack includes six 1.5V batteries and a battery holder for accommodating the batteries, and a movable battery cover is provided on the battery holder.

Compared with the existing refrigerant filling machine and refrigerant filling scale, the utility model has the following beneficial effects:

1. Programmable setting of the refrigerant weight to be filled, when the given set value is reached, the solenoid valve will automatically close and stop filling the refrigerant to achieve safe and convenient filling of refrigerant;

2. It can be safely and conveniently filled with different refrigerants, and its value can be programmed and set;

3. The solenoid valve is installed and fixed on the lower weighing pan, which reduces the weight of the hand-held control instrument and avoids more convenient operation; the solenoid valve is driven by 6 1.5V batteries, and does not need 220V AC drive. When working, the upper pulse When the current is applied, the coil is energized, and the magnetic steel is attracted to the valve core, so that the valve core rises, the liquid inlet and the liquid outlet on the lower valve body open and conduct, and the refrigerant can be circulated and filled. When the lower pulse current acts, the coil When the current in the other direction is obtained, the magnetic steel pushes the valve core downward under the action of the downward magnetic force, so that the valve core closes the channel between the liquid inlet and the liquid outlet, and the intermittent pulse mode is switched on and off, ensuring In the case of normal filling of refrigerant, electric energy is saved, the working and operating environment is wider, and the filling of refrigerant is faster;

4. The weighing pan and the control instrument adopt wireless connection, which increases the operation control space and makes the operation more convenient.

Description of drawings

Fig. 1 is a block diagram of the module of the present utility model;

Fig. 2 is the perspective view of controller described in the utility model;

Fig. 3 is the back structure diagram of the controller described in the utility model;

Fig. 4 is the explosion diagram of weighing pan described in the utility model;

Fig. 5 is an exploded view of the solenoid valve described in the present invention.

In the figure: 1-upper weighing pan, 2-lower weighing pan, 3-weight sensor, 4-solenoid valve, 5-main control circuit board, 6-key switch circuit board, 7-battery holder, 8-battery, 9- Display, 11-controller, 12-button, 13-LCD display, 14-sound hole, 15-indicator, 16-hook, 17-hook slot, 31-sensor connector, 41-solenoid valve connector, 42- Upper valve body, 43-lower valve body, 44-magnetic steel, 45-coil, 46-spool, 47-nut, 48-gasket, 431-liquid inlet, 432-liquid outlet, 51-key switch interface , 52-sensor interface, 53-solenoid valve interface, 54-receiving and transmitting antenna, 61-key switch connector, 71-battery cover.

Detailed ways

In order to make the utility model be further understood, the utility model is further described below with reference to the accompanying drawings and specific embodiments of the description:

As shown in Figures 1 to 5, a wireless high-flow programmable refrigerant filling scale includes a weighing pan and a controller 11 connected by wireless communication, the weighing pan is provided with a CPU processor, and the CPU processor is unidirectionally connected It has a power management module, a key input module, a weight sensor, a solenoid valve control module and an audible and visual alarm module. In order to realize wireless communication, the CPU processor is bidirectionally connected with a wireless transceiver. The solenoid valve control module is used to control the solenoid valve 4 to work under the pulse current to perform pulse opening and closing. Another CPU processor is arranged in the controller 11, and the CPU processor is unidirectionally connected with a power management module, a key input module, a liquid crystal display module and a sound and light alarm module, and the CPU processor of the controller 11 is bidirectionally connected with a wireless transceiver , the controller is a hand-held control instrument, which is provided with buttons 12 and a liquid crystal display 13, and control commands can be input through the buttons 12. The instruction is transmitted to the weighing pan by wireless transmission, and the weighing pan transmits the processed weight data back to the controller 11 by wireless transmission. The controller 11 is provided with a sound hole 14 and an indicator light 15. The sound and light alarm module in the controller 11 can display the alarm sound and light warning signal through the sound hole 14 and the indicator light 15 respectively. For easy portability, the top of the controller 11 Also be provided with hook 16, and hook 16 is fixed on the rotating shaft and can rotate, and the back of controller 11 is provided with hook slot 17, and hook 16 can be placed in this hook slot 17. The weighing pan includes a weighing body consisting of an upper weighing pan 1 and a lower weighing pan 2 . The inside of the scale body is provided with a main control circuit board 5, a key switch circuit board 6, a weight sensor 3, an electromagnetic valve 4 and a battery pack for power supply. The main control circuit board 5 is provided with a control chip, a solenoid valve interface 53, a sensor interface 31 and a key switch interface 51, and the information receiving and transmitting device is connected with a receiving and transmitting antenna 54, which can establish data communication with the terminal control instrument through wireless data transmission technology, The amount of refrigerant filling is set up through the terminal control instrument, the control chip is a programmable chip, and the preset data in the control chip can be adjusted and controlled through the input terminal of the control instrument. The solenoid valve 4 is connected to the solenoid valve interface 53 through the solenoid valve connector 41, the solenoid valve 4 can be controlled by the control chip, and then the flow rate of refrigerant filling is controlled. The weight sensor 3 is connected to the sensor interface 31 through the sensor connector 31, It converts analog signals such as the weight of the refrigerant into digital signals, and transmits them to the control chip on the main control circuit board 5 for processing and calculation. The key switch circuit board 6 is connected to the key switch interface 51 through the key switch connector 61, and then through The connected key input module inputs read-only data information and corresponding switch signals to the control chip.

Specifically, in a preferred embodiment of the present utility model, the solenoid valve 4 includes an upper valve body 42 and a lower valve body 43, the upper end of the upper valve body 42 is fixed in the weighing pan with a nut 47, and a gasket 48 is provided under the nut 47. . The upper valve body 42 is provided with a magnetic steel 44 and a coil 45 sleeved on the magnetic steel 44 . The lower valve body 43 is provided with a spool 46, the upper end of the spool 46 is inserted into the coil 45, and the lower end of the spool 46 falls into the lower valve body 43 to the liquid inlet 431 and the liquid outlet 432 on the lower valve body 43. Carry out on-off control. When the upper pulse current acts, the coil 45 is energized, and the magnetic steel 44 is attracted to the valve core 46, so that the valve core 46 rises, and the liquid inlet 431 and the liquid outlet 432 on the lower valve body 43 are opened and conducted, and the refrigerant can circulate. Filling, when the lower pulse current acts, the coil 45 gets the current in the other direction, and the magnetic steel 44 pushes the valve core 46 downward under the downward magnetic force, so that the valve core 46 connects the liquid inlet 431 and the liquid outlet 432 The passages between are closed, and the intermittent pulse mode is switched on and off, which saves electric energy while ensuring the normal filling of the refrigerant. The upper weighing pan 1 is provided with a display screen and a sound hole, and the main control circuit board 5 is also provided with an audible and visual alarm device, which can send a light alarm signal through the display screen, such as a red flashing light at a certain frequency. Hole for an audible alarm signal. Through the synchronization of sound and light alarm signals, people with red-green color blindness or deafness can know the occurrence of faults and carry out equipment troubleshooting in time. In order to make the working and operating environment more extensive, the battery pack adopted by the utility model is six 1.5V batteries 8, and all kinds of electrical components in the scale body are adapted to this voltage, which avoids the trouble of no electricity outdoors. A battery holder 7 for accommodating the battery 8 is also fixed, and a movable battery cover 71 is provided on the battery holder 7 .

To sum up, compared with the existing refrigerant filling machine and refrigerant filling scale, the utility model has the following beneficial effects:

1. Programmable setting of the refrigerant weight to be filled, when the given set value is reached, the solenoid valve will automatically close and stop filling the refrigerant to achieve safe and convenient filling of refrigerant;

2. It can be safely and conveniently filled with different refrigerants, and its value can be programmed and set;

3. The solenoid valve is installed and fixed on the lower weighing pan, which reduces the weight of the hand-held control instrument and avoids more convenient operation; the solenoid valve is driven by 6 1.5V batteries, and does not need 220V AC drive. When working, the upper pulse When the current is applied, the coil is energized, and the magnetic steel is attracted to the valve core, so that the valve core rises, the liquid inlet and the liquid outlet on the lower valve body open and conduct, and the refrigerant can be circulated and filled. When the lower pulse current acts, the coil When the current in the other direction is obtained, the magnetic steel pushes the valve core downward under the action of the downward magnetic force, so that the valve core closes the channel between the liquid inlet and the liquid outlet, and the intermittent pulse mode is switched on and off, ensuring In the case of normal filling of refrigerant, electric energy is saved, the working and operating environment is wider, and the filling of refrigerant is faster;

4. The weighing pan and the control instrument adopt wireless connection, which increases the operation control space and makes the operation more convenient.

The basic principles, main features and advantages of the present utility model have been shown and described above. Those skilled in the industry should understand that the utility model is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions describe only the principle of the utility model. There will be various changes and improvements, and these changes and improvements all fall within the scope of the claimed utility model, and the protection scope required by the utility model is defined by the appended claims and their equivalents.

Claims (4)

1. A wireless high-flow programmable refrigerant filling scale is characterized in that it includes a weighing pan and a controller connected by wireless communication, the weighing pan is provided with a CPU processor, and the CPU processor is unidirectionally connected with a power management Module, button input module, weight sensor, solenoid valve control module and sound and light alarm module, the CPU processor is bidirectionally connected to a wireless transceiver, the controller is equipped with a CPU processor, and the CPU processor is unidirectionally connected with a power management Module, button input module, liquid crystal display module and sound and light alarm module, the CPU processor of the controller is bidirectionally connected with a wireless transceiver, and the solenoid valve control module is used to control the solenoid valve to work under pulse current to perform Pulse opening and closing. 2. A wireless high-flow programmable refrigerant filling scale according to claim 1, wherein the solenoid valve is a pulse solenoid valve, comprising an upper valve body and a lower valve body, and the upper valve body A magnetic steel and a coil sleeved on the magnetic steel are provided, a spool is provided in the lower valve body, the upper end of the spool is inserted into the coil, and the lower end of the spool falls into the lower valve The body controls the opening and closing of the liquid inlet and the liquid outlet on the lower valve body. 3. A wireless high-flow programmable refrigerant filling scale according to claim 1, characterized in that, the weighing pan comprises a weighing body consisting of an upper weighing pan and a lower weighing pan, and the inside of the weighing body is provided with A main control circuit board, a key switch circuit board, a weight sensor, a solenoid valve, and a battery pack for power supply. The main control circuit board is provided with a control chip, a solenoid valve interface, a sensor interface, and a key switch interface. The solenoid valve The solenoid valve connector is connected to the solenoid valve interface, the weight sensor is connected to the sensor interface through the sensor connector, and the key switch circuit board is connected to the key switch interface through the key switch connector. 4. A wireless high-flow programmable refrigerant filling scale according to claim 3, characterized in that, the upper weighing pan is provided with a display screen and a sound hole, and the main control circuit board is also provided with a The sound and light alarm signal sent is fed back to the sound and light alarm device on the display screen.