Compressor running-in circuit and compressor running-in equipment

Abstract

The embodiment of the utility model provides a compressor running-in circuit and compressor running-in equipment, and relates to the technical field of compressor running-in. The compressor running-in circuit comprises a controller, an input module, a switch module, a vacuum pump, a recovery compressor, a power supply end and a plurality of electric valves, the plurality of electrically operated valves comprise an electrically operated valve positioned in the running-in test system, an electrically operated valve positioned in the vacuum system and an electrically operated valve positioned in the refrigerant filling and recycling system; the controller is respectively connected with the input module, the switch module and the plurality of electric valves; the switch module is connected with the vacuum pump, the recovery compressor and the power supply end. The switch module is further used for being connected with a running-in compressor. The controller is used for controlling the power supply end to supply power to the running-in compressor, the recovery compressor and the vacuum pump through the switch module, the purpose of automatic running-in of the compressors is achieved, manual operation procedures are greatly reduced, testing time is saved, and the yield is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of compressor running-in, and in particular to a compressor running-in circuit and a compressor running-in device. BACKGROUND

[0002] A compressor product needs to run for 1 to 5 minutes for running-in when it is offline, and the running-in process needs to perform operations such as vacuumizing the compressor, adding refrigerant, running-in, refrigerant recovery, and the like.

[0003] The traditional process is manually operated by a technician with professional knowledge, and each process is manually operated and the process state is judged by a person.

[0004] How to simplify the running-in process of the compressor is a technical problem to be solved by the present application. CONTENT OF THE UTILITY MODEL

[0005] The present application aims to provide a compressor running-in circuit and a compressor running-in device to solve the technical problem of how to simplify the running-in process of the compressor in the prior art.

[0006] To achieve the above-mentioned purpose, one or more embodiments of the present application adopt the following technical solutions.

[0007] In a first aspect, the embodiments of the present application provide a compressor running-in circuit, comprising a controller, an input module, a switch module, a vacuum pump, a recovery compressor, a power supply end, and a plurality of electric valves.

[0008] The plurality of electric valves comprises an electric valve located in a running-in test system, an electric valve located in a vacuum system, and an electric valve located in a refrigerant filling and recovery system.

[0009] The controller is connected to the input module, the switch module, and the plurality of electric valves, respectively.

[0010] The switch module is connected to the vacuum pump, the recovery compressor, and the power supply end; the switch module is further used to connect a running-in compressor; and the controller is used to control the power supply of the running-in compressor, the recovery compressor, and the vacuum pump by controlling the switch module.

[0011] Optionally, the compressor running-in circuit further comprises a sensor signal module; and the sensor signal module is connected to the controller.

[0012] The sensor signal module comprises a pressure sensor and a pressure acquisition circuit.

[0013] The pressure sensor is connected to the controller through the pressure acquisition circuit.

[0014] The pressure acquisition circuit comprises an RC filter circuit.

[0015] Optionally, the sensor signal module further comprises a temperature sensor and a temperature acquisition circuit;

[0016] The temperature sensor is connected to the controller through the temperature acquisition circuit;

[0017] The temperature acquisition circuit comprises an RC filter circuit.

[0018] Optionally, the compressor running-in circuit further comprises a bus module; the bus module is connected to the controller;

[0019] The bus module comprises a CAN bus;

[0020] The controller is connected to the running-in compressors through the CAN bus.

[0021] Optionally, the number of the running-in compressors is greater than 1, and all the running-in compressors are connected to the CAN bus.

[0022] Optionally, the compressor running-in circuit further comprises a bus module; the bus module is connected to the controller;

[0023] The bus module comprises a LIN bus;

[0024] The controller is connected to the plurality of electric valves through the LIN bus.

[0025] Optionally, the compressor running-in circuit further comprises a prompt signal module, the prompt signal module is connected to the controller; the prompt signal module comprises a plurality of indicator lights; the plurality of indicator lights comprise a preparation light, a test light, a recovery light, a reset light, an alarm light, a manual vacuum light, a manual recovery light and a manual filling light;

[0026] The input module comprises a preparation key, a test key, a recovery key, a reset key, an emergency stop key, a manual vacuum key, a manual recovery key and a manual filling key.

[0027] Optionally, the switch module comprises a relay drive circuit and a relay;

[0028] The controller is connected to the relay through the relay drive circuit;

[0029] The relay drive circuit comprises a triode and a MOS tube;

[0030] The controller is connected to the gate of the MOS tube through the triode, the source of the MOS tube is used for connecting a power supply, and the drain of the MOS tube is used for connecting the relay.

[0031] Optionally, the compressor running-in circuit further comprises an electronic scale and a signal conversion module.

[0032] The electronic scale is used to measure the mass of the compressor refrigerant recovery.

[0033] The electronic scale is connected to the controller through the signal conversion module.

[0034] In a second aspect, the embodiments of the present application provide a compressor running-in device, which comprises the compressor running-in circuit of the first aspect.

[0035] Compared with the prior art, the present application has the following beneficial effects:

[0036] The compressor running-in circuit provided by the embodiments of the present application can obtain the starting signal at the input module, thereby controlling the working of the vacuum pump, the running-in compressor and the recovery compressor, realizing automatic running-in, and completing each step of the automatic running-in according to the program of the controller, without manual operation of each step, thereby simplifying the running-in process. BRIEF DESCRIPTION OF DRAWINGS

[0037] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0038] Figure 1 It is a schematic diagram of a compressor running-in pipeline;

[0039] Figure 2 It is a schematic diagram of a compressor running-in circuit provided by the embodiments of the present application;

[0040] Figure 3 It is a schematic diagram of a pressure sensor connected to a controller through a pressure acquisition circuit provided by the embodiments of the present application;

[0041] Figure 4 It is a schematic diagram of a pressure acquisition circuit provided by the embodiments of the present application;

[0042] Figure 5 It is a schematic diagram of a temperature sensor connected to a controller through a temperature acquisition circuit provided by the embodiments of the present application;

[0043] Figure 6 It is a schematic diagram of a temperature acquisition circuit provided by the embodiments of the present application;

[0044] Figure 7 It is a schematic diagram of an RC filter circuit of a key provided by the embodiments of the present application;

[0045] Figure 8 A schematic diagram of a compressor break-in circuit including a plurality of keys is provided for embodiments of the present application;

[0046] Figure 9 A schematic diagram of a relay drive circuit is provided for embodiments of the present application;

[0047] Figure 10 A schematic diagram of a compressor break-in circuit including an electronic scale is provided for embodiments of the present application. DETAILED DESCRIPTION

[0048] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. The described embodiments are some embodiments of the present application, but not all embodiments of the present application. The components of the embodiments of the present application described in the drawings herein can be arranged and designed in various different configurations.

[0049] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work are within the scope of protection of the present application. The embodiments described below and the features in the embodiments can be combined with each other without conflict, if possible.

[0050] In the description of the present application, it should be noted that:

[0051] The relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between the entities or operations;

[0052] “Connection” should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be directly connected, or indirectly connected through an intermediate medium.

[0053] As Figure 1 , Figure 1A structure of a compressor break-in pipeline is shown, which includes a break-in test system 1, a vacuum system 2 and a refrigerant charging and recovery system 3. The break-in test system 1 can include one or more workstations of a break-in compressor 101, each of which corresponds to a high / low pressure gauge set 102. The vacuum system 2 is used to evacuate the break-in compressor 101, which is mainly achieved by a vacuum pump 201. The refrigerant charging and recovery system 3 functions to store and recover refrigerant, and includes a recovery compressor 301. Multiple valves can be provided in the break-in test system 1, the vacuum system 2 and the refrigerant charging and recovery system 3, which can include multiple manual valves and multiple electric valves, the number of valves can be adjusted, and sensors can also be provided at specific positions, such as Figure 1 P1 high pressure sensor, P2 high pressure sensor and pressure temperature sensor P / T in

[0054] As Figure 2 , Figure 2 A compressor break-in circuit is shown, which includes a controller, an input module, a switch module, a vacuum pump, a recovery compressor, a power supply end and multiple electric valves, i.e. the electric valves in the above-mentioned break-in test system 1, the electric valves in the above-mentioned vacuum system 2 and the electric valves in the above-mentioned refrigerant charging and recovery system 3.

[0055] The controller can be a single-chip microcomputer, which is connected to the input module, the switch module and the multiple electric valves. The input module can include buttons or keys, and the controller receives instructions through the input module to control the operation of automatic break-in.

[0056] For example, the input module can include a preparation key, and when the preparation key is pressed, the controller can reset each electric valve, such as the electric valve between the recovery system 3 and the break-in test system 1 to enter a closed state.

[0057] The input module can include a test key, and when the test key is pressed, the controller starts to execute each step of automatic break-in, which can include a vacuum evacuation step, a refrigerant charging step, a break-in step and a refrigerant recovery step.

[0058] The switch module is connected to the vacuum pump, the recovery compressor and the power supply end, and is also used to connect the break-in compressor, and the controller is used to control the power supply or power cut of the break-in compressor, the recovery compressor and the vacuum pump through the switch module. The switch module can be multiple relays.

[0059] In the vacuum evacuation step, the controller keeps the electric valve between the refrigerant charging and recovery system 3 and the break-in test system 1 closed, opens the electric valve between the vacuum system 2 and the break-in test system 1, and turns on the vacuum pump through the switch module to achieve vacuum evacuation.

[0060] In the refrigerant charging step, the controller closes the electric valve between the vacuum system 2 and the break-in test system 1, and opens the electric valve between the refrigerant charging and recovery system 3 and the break-in test system 1, so that the refrigerant flows to the break-in test system 1 due to the pressure difference between the refrigerant charging and recovery system 3 and the break-in test system 1.

[0061] In the break-in step, the controller closes the electric valve between the refrigerant charging and recovery system 3 and the break-in test system 1, and turns on the break-in compressor through the switch module and keeps the break-in compressor running.

[0062] In the refrigerant recovery step, the controller turns off the break-in compressor through the switch module, opens the electric valve between the refrigerant charging and recovery system 3 and the break-in test system 1, and turns on the recovery compressor 301 through the switch module, so that the recovery compressor 301 can recover the refrigerant and make the refrigerant enter the refrigerant charging and recovery system 3.

[0063] The controller can store a control program to realize the above control process, and the controller can obtain a start signal through the input module to control the operation of the vacuum pump, the break-in compressor and the recovery compressor, so as to realize automatic break-in. The controller can complete each step of the automatic break-in according to the program of the controller, without manual operation of each step, thereby simplifying the break-in process.

[0064] The compressor break-in circuit can further include a sensor signal module connected to the controller. The sensor signal module can include a pressure sensor and a pressure acquisition circuit, such as Figure 3 The pressure sensor is connected to the controller through the pressure acquisition circuit. The number and position of the pressure sensors in the break-in test system 1, the vacuum system 2 and the refrigerant charging and recovery system 3 can be adjusted, and each pressure sensor can be correspondingly provided with a pressure acquisition circuit.

[0065] As shown in Figure 4 , Figure 4 An embodiment of a pressure acquisition circuit is shown, which can include an RC filter circuit. The output end of the pressure sensor is connected to TP_P1, the capacitor C76 is used for signal input filtering, the pressure signal is pulled down to the ground through the resistor R147, and is input to the single-chip microcomputer after passing through the RC filter circuit composed of the capacitor C77 and the resistor R145 for reading, the single-chip microcomputer is connected to the ADC_TP_P1 end, and the single-chip microcomputer can read the current pressure signal value in real time.

[0066] As shown in Figure 5 , the sensor signal module can include a temperature sensor and a temperature acquisition circuit, and the temperature sensor is connected to the controller through the temperature acquisition circuit. The number of temperature sensors in the break-in test system 1, the vacuum system 2 and the refrigerant charging and recovery system 3 can be adjusted, and each temperature sensor can be correspondingly provided with a temperature acquisition circuit.

[0067] As Figure 6 , Figure 6 An embodiment of a temperature acquisition circuit is shown, which includes an RC filter circuit. The output terminal of the temperature sensor is connected to the TP_T terminal, which is pulled up to the 5V_senser power supply through the resistance R149, and is input to the single-chip microcomputer for reading after passing through the RC filter circuit composed of the capacitance C78, the resistance R148 and the capacitance C79. The single-chip microcomputer is connected to the ADC_TP_T terminal, and the single-chip microcomputer can read the current temperature signal value in real time.

[0068] The keys in the input module can also be provided with an RC filter circuit, as Figure 7 The BUT_REC3 terminal receives the key signal, and when the key is pressed, the voltage signal read by the single-chip microcomputer is the key supply voltage, and when the key is not pressed, the voltage signal read by the single-chip microcomputer is 0V. The key signal can be pulled down to the ground through the resistance R151, input to the single-chip microcomputer for reading after passing through the RC filter circuit composed of the capacitance C81 to the power supply and the resistance R150 and the capacitance C80.

[0069] The input module can include a preparation key, a test key, a recovery key, a reset key, an emergency stop key, a manual vacuum key, a manual recovery key and a manual filling key, and the controller can be configured to recognize the state of the corresponding key and control the circuit according to the state of the corresponding key.

[0070] The compressor running-in circuit can also include a prompt signal module connected to the controller; the prompt signal module is used to show the working state to the user in the form of sound or light.

[0071] The prompt signal module can be configured to include a plurality of indicator lights, including a preparation light, a test light, a recovery light, a reset light, an alarm light, a manual vacuum light, a manual recovery light and a manual filling light, and each working state has a corresponding light prompt.

[0072] The controller can be configured to determine the state of each sensor in real time, determine the operation process, automatically control the compressor, the electric valve and other devices to run, and control the on-off of each indicator light. For example, in the preparation step, the preparation key is pressed, the preparation light is on, and the other lights are off; in the vacuumizing step, the manual vacuum key is pressed, the preparation light is off, and the manual vacuum light is on.

[0073] The controller can be configured to stop when an abnormality is detected by the sensor, such as a temperature abnormality or a pressure abnormality. The alarm function can be further provided in the prompt signal module, which can be realized by the opening of the audible and visual alarm light, and the controller can make the audible and visual alarm light sound and light when an abnormality is detected by the sensor.

[0074] As Figure 8Some of the number of keys can correspond to the number of compressor stations being run-in, such as the number of preparation keys, test keys, and recovery keys corresponding to the number of compressor stations being run-in, and the reset key, emergency stop key, manual vacuum key, manual recovery key, and manual filling key can be set to only one, and the entire run-in test system 1 shares a set of reset keys, emergency stop keys, manual vacuum keys, manual recovery keys, and manual filling keys.

[0075] When the single-chip microcomputer is used as the controller and the relay is used as the switch module, the single-chip microcomputer can control the relay through the relay driving circuit, the relay driving circuit includes a transistor and a MOS tube, the controller is connected to the gate of the MOS tube through the transistor, the source of the MOS tube is used to connect the power supply, and the drain of the MOS tube is used to connect the relay, so that the controller can control the state of the relay.

[0076] As shown in FIG. 1, the run-in test system 1 includes a preparation key, a test key, a recovery key, a reset key, an emergency stop key, a manual vacuum key, a manual recovery key, and a manual filling key. Figure 9 , Figure 9 An embodiment of a relay driving circuit is shown, the IO_SSR2 end receives the control signal sent by the single-chip microcomputer, the IO_SSR2 end is connected to the 2 pin of the transistor Q27 through the resistor R135 and connected to the 3 pin of the transistor Q27 through the resistor R137. The 1 pin of the transistor Q27 is connected to one end of the resistor R136, the other end of the resistor R136 is connected to one end of the resistor R138 and the 1 pin of the PMOS tube Q28, the other end of the resistor R138 is connected to 12V+ power supply, and the 2 pin of the PMOS tube Q28 is connected to 12V+ power supply. The 3 pin of the PMOS tube Q28 is connected to the negative electrode of the freewheeling diode D9 as a control output. The positive electrode of the freewheeling diode D9 is connected to the 2 pin of the transistor Q27.

[0077] When the control signal is 0V, the 2 pin of the transistor Q27 is 0V, at this time, the 1 pin and the 3 pin of the transistor Q27 are in an open state. The 1 pin of the transistor Q27 is connected to the power supply through two resistors in series. At this time, the 1 pin and the 2 pin of the PMOS tube Q28 are also connected to this line, which is also the power supply voltage, and the voltage of the 3 pin of the PMOS tube Q28 is 0V, which cannot supply power to the external switch device.

[0078] When the control signal is high voltage, the 2 pin of the transistor Q27 is pulled high. Due to the PN junction between the 2 pin and the 3 pin of the transistor Q27, the voltage is 0.5 to 0.7V, at this time the 1 pin and the 3 pin of the transistor Q27 are turned on, and the voltage of the 1 pin of the transistor Q27 is 0V. The resistance R136 and the resistance R138 have the same resistance value, at this time the voltage between the two resistances and the 1 pin of the PMOS tube Q28 is half of the supply voltage. At this time, a voltage difference is formed between the 2 pin and the 1 pin of the PMOS tube Q28, at this time the 2 pin and the 3 pin of the PMOS tube Q28 are turned on, and the voltage of the 3 pin of the PMOS tube Q28 is the supply voltage, which can supply power to the relay, so that the output voltage can be controlled by switching the control signal, and the equipment switch can be controlled.

[0079] As Figure 10 , the compressor running-in circuit can further include an electronic scale and a signal conversion module, the electronic scale being connected to the controller through the signal conversion module, and the electronic scale being used to measure the mass of the recovered refrigerant of the compressor, so as to better control the process of automatic recovery of the refrigerant.

[0080] A bus module can be provided, and the controller is connected to the running-in compressor, the recovery compressor and the electric valve through the bus module, so as to facilitate the adjustment and control of the running-in compressor, the recovery compressor and the electric valve. Figure 10 The bus module can include a CAN bus, and the controller is connected to the running-in compressor or the recovery compressor through the CAN bus; and the bus module can include a LIN bus, and the controller is connected to a plurality of electric valves through the LIN bus.

[0081] Based on the above embodiment, the embodiment of the present application further provides a compressor running-in device, which includes the compressor running-in circuit described above.

[0082] In general, the compressor running-in circuit and the compressor running-in device provided by the present application can achieve the purpose of automatic running-in of the compressor, greatly reduce the manual operation process, save the test time, and improve the yield. Only the control button and the fault or alarm need to be noticed in the whole process, and no other artificial judgment is needed, so that the operation is simplified and the difficulty is reduced. A plurality of sensors can be provided to detect the fault in real time and automatically stop urgently, which is safer.

[0083] The device and system embodiments described above are only schematic, and part or all of the modules can be selected according to actual needs to achieve the purpose of the embodiment. Those skilled in the art can understand and implement without creative labor.

[0084] The above merely provides the preferred embodiments of the present application, and the protection scope of the present application is not limited thereto, and any changes or substitutions within the technical scope disclosed by the present application can be easily thought by any person skilled in the art, and should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A compressor run-in circuit, characterized by, The compressor break-in circuit comprises a controller, an input module, a switch module, a vacuum pump, a recovery compressor, a power supply end and a plurality of electric valves. The plurality of electric valves comprises electric valves located in the break-in test system, electric valves located in the vacuum system and electric valves located in the refrigerant charging and recovery system. The controller is connected with the input module, the switch module and the plurality of electric valves respectively. The switch module is connected with the vacuum pump, the recovery compressor and the power supply end; the switch module is also used for connecting a break-in compressor; the controller is used for controlling the power supply end to supply power for the break-in compressor, the recovery compressor and the vacuum pump through the switch module.

2. The compressor run-in circuit of claim 1, wherein, The compressor break-in circuit further comprises a sensor signal module; the sensor signal module is connected with the controller. The sensor signal module comprises a pressure sensor and a pressure acquisition circuit. The pressure sensor is connected with the controller through the pressure acquisition circuit. The pressure acquisition circuit comprises an RC filter circuit.

3. The compressor run-in circuit of claim 2, wherein, The sensor signal module further comprises a temperature sensor and a temperature acquisition circuit. The temperature sensor is connected with the controller through the temperature acquisition circuit. The temperature acquisition circuit comprises an RC filter circuit.

4. The compressor run-in circuit of claim 1, wherein, The compressor break-in circuit further comprises a bus module; the bus module is connected with the controller. The bus module comprises a CAN bus. The controller is connected with the break-in compressor through the CAN bus.

5. The compressor run-in circuit of claim 4, wherein, The number of the break-in compressors is greater than 1; all the break-in compressors are connected with the CAN bus.

6. The compressor run-in circuit of claim 1, wherein, The compressor break-in circuit further comprises a bus module; the bus module is connected with the controller. The bus module comprises a LIN bus. The controller is connected with the plurality of electric valves through the LIN bus.

7. The compressor run-in circuit of claim 1, wherein the run-in circuit is configured to operate in a first mode and a second mode, the first mode being a run-in mode and the second mode being a normal mode. The compressor break-in circuit further comprises a prompt signal module; the prompt signal module is connected with the controller; the prompt signal module comprises a plurality of indicator lights; the plurality of indicator lights comprise a preparation light, a test light, a recovery light, a reset light, an alarm light, a manual vacuum light, a manual recovery light and a manual charging light. The input module comprises a preparation button, a test button, a recovery button, a reset button, an emergency stop button, a manual vacuum button, a manual recovery button and a manual charging button.

8. The compressor run-in circuit of claim 1, wherein, The switch module comprises a relay drive circuit and a relay. The controller is connected with the relay through the relay drive circuit. The relay drive circuit comprises a triode and a MOS tube. The controller is connected with the gate of the MOS tube through the triode; the source of the MOS tube is used for connecting a power supply; and the drain of the MOS tube is used for connecting the relay.

9. The compressor run-in circuit of claim 1, wherein, The compressor break-in circuit further comprises an electronic scale and a signal conversion module. The electronic scale is used for measuring the mass of the refrigerant recovered by the compressor. The electronic scale is connected with the controller through the signal conversion module.

10. A compressor break-in apparatus, characterized by, The compressor break-in device comprises the compressor break-in circuit according to any one of claims 1 to 9.

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