Testing device and testing system for electronic expansion valve

Abstract

The invention aims to provide a testing device and a testing system for an electronic expansion valve. The testing device comprises a device body, an expansion valve control switch, a first expansion valve control module, a first gas path control switch, a first gas path control module and a first gas flow detection module. The expansion valve control switch generates an expansion valve opening instruction or an expansion valve closing instruction. The first expansion valve control module is electrically connected with the expansion valve control switch and the first electronic expansion valve and controls the first electronic expansion valve to be opened or closed. The first gas path control switch generates a first gas path connection instruction or a first gas path cut-off instruction. One end of the first gas path control module is connected with a gas inlet of the first electronic expansion valve, and the other end is connected with an external gas input device. The first gas path control module controls connection or disconnection of a gas path between the first electronic expansion valve and an external gas input device. The first airflow detection module detects whether gas flows out of a gas outlet of the first electronic expansion valve or not.

Description

Technical Field

[0001] The present application relates to the field of automatic testing, and in particular to a testing device and a testing system for an electronic expansion valve. Background Art

[0002] An electronic expansion valve is a control element that uses electrical signals to adjust the gas flow. Electronic expansion valves can be used in the production process of refrigeration systems. For example, when workers are welding copper pipes, they can use electronic expansion valves to pass welding shielding gas to protect the copper pipe brazing.

[0003] Before the staff conducts copper pipe welding, they need to open the electronic expansion valve and confirm that the electronic expansion valve is in the open state. Then, during the welding process, the staff can introduce sufficient welding shielding gas through the electronic expansion valve. If the electronic expansion valve is not opened or is opened to a small extent before welding, the shielding gas will be introduced in a small amount during the welding process, which may easily lead to over-welding or leakage at the copper pipe welding point, thereby greatly reducing the stability of the manufactured refrigeration system.

[0004] In the prior art, the switch state of the electronic expansion valve is usually detected manually, for example, the electronic expansion valve is opened manually, gas is introduced into the electronic expansion valve, and whether gas flows out of the electronic expansion valve is manually sensed to determine whether the electronic expansion valve is open.

[0005] However, the inventors have found that the manual detection method of the prior art is prone to the situation where the electronic expansion valve is open, but the human operator does not sense the gas flow and believes that the electronic expansion valve is not open, and then the electronic expansion valve will be identified as damaged, resulting in a misjudgment problem.

[0006] That is, the reliability of the manual detection method in the prior art is low, and it is easy for the actual situation of the electronic expansion valve to be inconsistent with the manual measurement result. In addition, the manual detection method in the prior art also has the problem of low efficiency. Summary of the invention

[0007] The present application aims to provide a testing device and a testing system for an electronic expansion valve.

[0008] According to one aspect of the present application, a test device for an electronic expansion valve is provided, comprising: a device body, an expansion valve control switch, a first expansion valve control module, a first gas path control switch, a first gas path control module and a first airflow detection module. The expansion valve control switch is arranged on the surface of the device body, and generates an expansion valve opening instruction or an expansion valve closing instruction in response to a first user instruction. The first expansion valve control module is arranged inside the device body, and is electrically connected to the expansion valve control switch and the first electronic expansion valve, respectively, and responds to the expansion valve opening instruction or the expansion valve closing instruction to control the first electronic expansion valve to open or close. The first gas path control switch is arranged on the surface of the device body, and generates a first gas path connection instruction or a first gas path cut-off instruction in response to a second user instruction. The first gas path control module is arranged inside the device body, and one end of the first gas path control module is connected to the gas inlet of the first electronic expansion valve, and the other end is connected to an external gas input device. The first gas path control module is also electrically connected to the first gas path control switch, and responds to the first gas path connection instruction or the first gas path cut-off instruction to control the connection or cut-off of the gas path between the first electronic expansion valve and the external gas input device. The first airflow detection module is arranged on the device body and located at the gas outlet of the first electronic expansion valve to detect whether there is gas flowing out of the gas outlet of the first electronic expansion valve to determine the switch state of the first electronic expansion valve.

[0009] According to some embodiments, the first expansion valve control module includes a switch controller and a driver. The switch controller is electrically connected to the expansion valve control switch, and outputs a first opening signal and a second opening signal in response to the expansion valve opening instruction, and outputs a first closing signal and a second closing signal in response to the expansion valve closing instruction. The driver includes a first signal input terminal, a second signal input terminal, and an output terminal. In the case where the switch controller outputs the first opening signal and the second opening signal, the first signal input terminal receives the first opening signal, the second signal input terminal receives the second opening signal, and the output terminal outputs a valve opening signal to control the first electronic expansion valve to open; and in the case where the switch controller outputs the first closing signal and the second closing signal, the first signal input terminal receives the first closing signal, the second signal input terminal receives the second closing signal, and the output terminal outputs a valve closing signal to control the first electronic expansion valve to close.

[0010] According to some embodiments, the switch controller includes a relay, and the relay includes a relay coil, a first switch, and a second switch. One end of the relay coil is connected to one end of the expansion valve control switch, the other end of the expansion valve control switch is connected to the power supply, and the other end of the relay coil is grounded. One end of the first switch is grounded, and the other end of the first switch is connected to the first signal input end. One end of the second switch is grounded, and the other end of the second switch is connected to the second signal input end. Wherein, when the relay coil is energized, the first switch switches to a first preset state to input a first turn-on signal to the first signal input end, and the second switch switches to a second preset state to input a second turn-on signal to the second signal input end. When the relay coil is not energized, the first switch switches to a second preset state to input a first turn-off signal to the first signal input end, and the second switch switches to the first preset state to input a second turn-off signal to the second signal input end.

[0011] According to some embodiments, the first gas circuit control module includes a solenoid valve. The solenoid valve includes a first gas input port, a second gas input port, and a gas output port. One end of the solenoid valve is electrically connected to one end of the first gas circuit control switch, the other end of the solenoid valve is grounded, and the other end of the first gas circuit control switch is connected to a power supply. The first gas input port is connected to an external gas input device. The second gas input port is connected to a closed pipeline. The gas output port is connected to a gas inlet of the first electronic expansion valve. The solenoid valve responds to the first gas circuit connection instruction, so that the gas circuit between the first gas input port and the gas output port is connected, so that the external gas input device and the gas inlet of the first electronic expansion valve are in a connected state. The solenoid valve responds to the first gas circuit cutoff instruction, so that the gas circuit between the second gas input port and the gas output port is connected, so that the external gas input device and the gas inlet of the first electronic expansion valve are in a cutoff state.

[0012] According to some embodiments, the testing device further comprises a throttling module, which is disposed on a gas pipeline between a gas outlet of the solenoid valve and the first electronic expansion valve to adjust the flow of gas flowing to the first electronic expansion valve.

[0013] According to some embodiments, the testing device further comprises a fixing module. The fixing module is arranged on the surface of the device body, and a gas pipeline is arranged below the fixing module, and the gas pipeline is connected to the external gas input device. The fixing module is detachably connected to the first electronic expansion valve, and the gas inlet of the first electronic expansion valve is communicated with the gas pipeline to fix the first electronic expansion valve.

[0014] According to some embodiments, the first airflow detection module includes a detection object support portion and a detection object, wherein the detection object support portion supports the detection object. The detection object support portion is disposed on the device body and is located at the gas outlet of the first electronic expansion valve to detect whether gas flows out of the gas outlet of the first electronic expansion valve through the detection object.

[0015] According to some embodiments, the test device further includes a second expansion valve control module, a second gas circuit control switch, a second gas circuit control module and a second air flow detection module. The second expansion valve control module is arranged inside the device body, electrically connected to the expansion valve control switch, and electrically connected to the second electronic expansion valve, responding to the expansion valve opening instruction or the expansion valve closing instruction, and controlling the second electronic expansion valve to open or close. The second gas circuit control switch is arranged on the surface of the device body, responding to the third user instruction, generating a second gas circuit connection instruction or a second gas circuit cut-off instruction. The second gas circuit control module is arranged inside the device body, one end of the second gas circuit control module is connected to the gas inlet of the second electronic expansion valve, and the other end is connected to the external gas input device. The second gas circuit control module is electrically connected to the second gas circuit control switch, responding to the second gas circuit connection instruction or the second gas circuit cut-off instruction, and controlling the gas circuit between the second electronic expansion valve and the external gas input device to be connected or cut off. The second air flow detection module is arranged on the surface of the device body and located at the gas outlet of the second electronic expansion valve to detect whether there is gas flowing out of the gas outlet of the second electronic expansion valve.

[0016] According to another aspect of the present application, a test system for an electronic expansion valve is provided, the test system comprising a first electronic expansion valve and / or a second electronic expansion valve. The test system further comprises the test device described in the above aspect.

[0017] Beneficial Effects

[0018] The present application can automatically control the opening or closing of the first electronic expansion valve through the expansion valve control switch and the first expansion valve control module set on the device body. And the test device of the present application can automatically control the blowing of air to the first electronic expansion valve through the first gas path control switch and the first gas path control module. And the test device of the present application can automatically detect whether there is gas flowing out of the gas outlet of the first electronic expansion valve through the first air flow detection module, so as to judge the switch state of the first electronic expansion valve. The user can judge whether the first electronic expansion valve is damaged or successfully opened according to the actual switch state of the first electronic expansion valve detected. This improves the efficiency and intelligence of the detection on the one hand, and reduces the probability of manual judgment errors on the other hand. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1This is a schematic diagram of the external structure of the test device according to the embodiment of the present application;

[0021] Figure 2 A cross-sectional view of a test device according to an embodiment of the present application;

[0022] Figure 3 This is a circuit connection diagram of the expansion valve control switch and the gas circuit control switch of the embodiment of the present application;

[0023] Figure 4 This is a circuit connection diagram of the expansion valve control module of the embodiment of the present application;

[0024] Figure 5 A circuit diagram of a power module according to an embodiment of the present application;

[0025] Figure 6 This is a gas circuit connection diagram of the test device of the embodiment of the present application;

[0026] Figure 7 It is an overall schematic diagram of the testing device of the embodiment of the present application.

[0027] Description of reference numerals:

[0028] 01. First electronic expansion valve; 02. Second electronic expansion valve; 0. Device body; 1. Expansion valve control switch; 2. First expansion valve control module; 21. Switch controller; 211. Relay coil; 212. First switch; 213. Second switch; 22. Driver; 3. First gas path control switch; 4. First gas path control module; 41. Solenoid valve; 5. First air flow detection module; 51. Detection object support; 6. Second expansion valve control module; 7. Second gas path control switch; 8. Second gas path control module; 9. Second air flow detection module; 10. Fixing module; 11. Throttling module. DETAILED DESCRIPTION

[0029] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this application will be comprehensive and complete and will fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar parts, and thus their repeated description will be omitted.

[0030] The described features, structures or characteristics may be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present disclosure. However, those skilled in the art will appreciate that the technical solutions of the present disclosure may be practiced without one or more of these specific details, or other modes, components, materials, devices, etc. may be adopted. In these cases, known structures, methods, devices, implementations, materials or operations will not be shown or described in detail.

[0031] In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or units that are inherent to these processes, methods, products or devices.

[0032] The terms "first", "second" and the like in the specification and claims of this application and the above drawings are used to distinguish different objects rather than to describe a specific order.

[0033] The following is a clear and complete description of the technical solution of the present application in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0034] According to one aspect of the present application, an embodiment of the present application provides a testing device for an electronic expansion valve. Figure 1 The external structure of the testing device of the electronic expansion valve according to the embodiment of the present application is shown. Figure 2 It is a cross-sectional view of the testing device, showing the internal structure of the testing device.

[0035] Reference Figure 1 and Figure 2 The testing device includes a device body 0, an expansion valve control switch 1, a first expansion valve control module 2, a first gas path control switch 3, a first gas path control module 4 and a first air flow detection module 5.

[0036] According to an exemplary embodiment, the expansion valve control switch 1 is disposed on a surface of the device body 0 and generates an expansion valve opening instruction or an expansion valve closing instruction in response to a first user instruction.

[0037] The first expansion valve control module 2 is disposed inside the device body 0 and is electrically connected to the expansion valve control switch 1 and the first electronic expansion valve 01 respectively, and responds to the expansion valve opening instruction or the expansion valve closing instruction to control the first electronic expansion valve 01 to open or close.

[0038] Exemplarily, the expansion valve control switch 1 may be a knob switch. The knob switch may be disposed on the top surface of the device body 0 for user operation. The user may rotate the knob switch to a first state so that the knob switch generates an expansion valve opening instruction; the user may also rotate the knob switch to a second state so that the knob switch generates an expansion valve closing instruction.

[0039] Exemplarily, when the user rotates the knob switch to the first state, the first expansion valve control module 2 receives the expansion valve opening instruction and controls the first electronic expansion valve 01 to open; when the user rotates the knob switch to the second state, the first expansion valve control module 2 receives the expansion valve closing instruction and controls the first electronic expansion valve 01 to close, so as to achieve the function of automatically controlling the opening and closing of the first electronic expansion valve 01 in response to the first user instruction.

[0040] According to an exemplary embodiment, the first gas path control switch 3 is also disposed on the surface of the device body 0 , and generates a first gas path connection instruction or a first gas path cutoff instruction in response to a second user instruction.

[0041] Exemplarily, the first gas circuit control switch 3 may be a momentary switch. The first gas circuit control switch 3 may also be disposed on the top surface of the device body 0 for user operation. When the user presses the momentary switch, the momentary switch may generate a first gas circuit connection instruction, and when the user releases the momentary switch, the momentary switch may generate a first gas circuit cutoff instruction.

[0042] It is worth noting that when the user presses the momentary switch, the momentary switch can also generate a first gas path cutoff instruction, and when the user releases the momentary switch, a first gas path connection instruction is generated, which is not limited here.

[0043] According to the exemplary embodiment, the first gas circuit control module 4 is disposed inside the device body 0. One end of the first gas circuit control module 4 is connected to the gas inlet of the first electronic expansion valve 01, and the other end of the first gas circuit control module 4 is connected to the external gas input device to control the communication state of the gas circuit between the first electronic expansion valve 01 and the external gas input device.

[0044] According to the exemplary embodiment, the first gas circuit control module 4 is electrically connected to the first gas circuit control switch 3. In the case where the first gas circuit control switch 3 outputs a first gas circuit connection instruction, the first gas circuit control module 4 responds to the first gas circuit connection instruction and controls the gas circuit connection between the first electronic expansion valve 01 and the external gas input device.

[0045] When the first gas circuit control switch 3 outputs the first gas circuit cut-off instruction, the first gas circuit control module 4 responds to the first gas circuit cut-off instruction and controls the gas circuit between the first electronic expansion valve 01 and the external gas input device to be cut off.

[0046] According to the exemplary embodiment, the first airflow detection module 5 is also arranged on the device body 0 and is located at the gas outlet of the first electronic expansion valve 01 to detect whether there is gas flowing out of the gas outlet of the first electronic expansion valve 01, thereby determining the switching state of the first electronic expansion valve 01.

[0047] Exemplarily, the user can rotate the expansion valve control switch 1 to the first state, and the expansion valve control switch 1 outputs an expansion valve opening instruction. The first expansion valve control module 2 controls the first electronic expansion valve 01 to open in response to the expansion valve opening instruction. Thereafter, the user can press the first gas circuit control switch 3, so that the first gas circuit control switch 3 outputs a first gas circuit connection instruction. The first gas circuit control module 4 responds to the first gas circuit connection instruction, so that the external gas input device transmits gas to the electronic expansion valve.

[0048] When the first electronic expansion valve 01 is successfully opened, gas will flow out of the gas outlet of the first electronic expansion valve 01, so that the first airflow detection module 5 can detect the airflow, and then determine that the first electronic expansion valve 01 is in the open state, and the first electronic expansion valve 01 is an electronic expansion valve that can be opened normally.

[0049] When the first electronic expansion valve 01 fails to open successfully, no gas will flow out of the gas outlet of the first electronic expansion valve 01, so that it can be determined that the first electronic expansion valve 01 is in a closed state, and further it can be determined that the first electronic expansion valve 01 is an abnormal electronic expansion valve.

[0050] In the embodiment of the present application, the present application can automatically control the opening or closing of the first electronic expansion valve 01 through the expansion valve control switch 1 and the first expansion valve control module 2 set on the device body 0. And the embodiment of the present application can automatically control the blowing to the first electronic expansion valve 01 through the first gas path control switch 3 and the first gas path control module 4. And the embodiment of the present application can automatically detect whether there is gas flowing out of the gas outlet of the first electronic expansion valve 01 through the first air flow detection module 5, so as to judge the switch state of the first electronic expansion valve 01. The user can judge whether the first electronic expansion valve 01 is damaged or successfully opened according to the actual switch state of the first electronic expansion valve 01 detected.

[0051] Compared with the method of manually opening and manually detecting the switch state of the first electronic expansion valve 01 in the prior art, the present application improves the efficiency and intelligence of detection on the one hand, and reduces the probability of manual misjudgment on the other hand.

[0052] In addition, the following situation is prone to occur in the manual detection method of the prior art. That is, when the opening of the electronic expansion valve is small (not fully opened), the electronic expansion valve is manually sensed to be fully opened because of the gas flow. In this way, when the electronic expansion valve is used in the future, the amount of welding shielding gas introduced will be insufficient, thereby affecting the welding quality.

[0053] However, in the embodiment of the present application, the first expansion valve control module 2 is configured to control the first electronic expansion valve 01 to be fully open or fully closed. In this way, the first electronic expansion valve 01 is in a fully closed state or a fully open state, and will not be in a half-open state. In this way, in the embodiment of the present application, there will be no situation in the prior art where the electronic expansion valve has a small opening, and the gas flow is artificially sensed to be considered that the electronic expansion valve is fully open, thereby reducing the probability of a small amount of shielding gas being introduced when the first electronic expansion valve 01 after the test is used for subsequent welding.

[0054] According to some embodiments, the testing device may further include a first start indicator light. The first start indicator light is electrically connected to the first expansion valve control module 2.

[0055] According to the exemplary embodiment, the first expansion valve control module 2 outputs an opening success instruction when controlling the first electronic expansion valve 01 to open at full opening. The first opening indicator light responds to the opening success instruction and switches to a preset state (for example, the first start indicator light is on).

[0056] In this way, when the user manually observes that the first opening indicator light is on, the user can believe that the first expansion valve control module 2 should have controlled the first electronic expansion valve 01 to switch to the open state, so that the user can control the first gas circuit control switch 3 to generate a first gas circuit connection instruction to actually detect whether the first electronic expansion valve 01 is successfully opened, thereby completing the test of the first electronic expansion valve 01.

[0057] According to some embodiments, Figure 3 and Figure 4 The circuit connection diagrams of the test device are shown respectively. Figure 3 and Figure 4 The first expansion valve control module 2 includes a switch controller 21 and a driver 22 .

[0058] The switch controller 21 is electrically connected to the expansion valve control switch 1, and outputs a first opening signal and a second opening signal in response to an expansion valve opening instruction, and outputs a first closing signal and a second closing signal in response to an expansion valve closing instruction.

[0059] According to an exemplary embodiment, the switch controller 21 includes a first output terminal and a second output terminal. In response to the expansion valve opening instruction, the switch controller 21 outputs a first opening signal at the first output terminal and a second opening signal at the second output terminal. In response to the expansion valve closing instruction, the switch controller 21 outputs a first closing signal at the first output terminal and a second closing signal at the second output terminal.

[0060] The driver 22 includes a first signal input terminal, a second signal input terminal and an output terminal. The first signal input terminal is connected to the first output terminal to receive a first start signal or a first shutdown signal output by the first output terminal. The second signal input terminal is connected to the second output terminal to receive a second start signal or a second shutdown signal output by the second output terminal.

[0061] The output end is electrically connected to the first electronic expansion valve 01 , and outputs a valve opening signal or a valve closing signal to control the first electronic expansion valve 01 to open or close.

[0062] According to the example embodiment, when the switch controller 21 responds to the expansion valve opening instruction (that is, when the switch controller 21 outputs the first opening signal and the second opening signal), the first signal input end receives the first opening signal, the second signal input end receives the second opening signal, and the output end outputs the valve opening signal to control the first electronic expansion valve 01 to open.

[0063] When the switch controller 21 responds to the expansion valve closing instruction (that is, when the switch controller 21 outputs the first closing signal and the second closing signal), the first signal input end receives the first closing signal, the second signal input end receives the second closing signal, and the output end outputs the valve closing signal to control the first electronic expansion valve 01 to close.

[0064] According to some embodiments, the switch controller 21 may be a relay, which includes a relay coil 211, a first switch 212, and a second switch 213. When the relay coil 211 is powered, the first switch 212 and the second switch 213 are activated to switch the switch state.

[0065] For example, the first switch 212 is a normally open switch and the second switch 213 is a normally closed switch. When the relay coil 211 is not energized, the first switch 212 is in an open state and the second switch 213 is in a closed state. When the relay coil 211 is energized, the first switch 212 is closed to switch to a closed state; and the second switch 213 is opened to switch to an open state.

[0066] According to an exemplary embodiment, one end of the relay coil 211 is electrically connected to one end of the expansion valve control switch 1, and the other end of the relay coil 211 is grounded. The other end of the expansion valve control switch 1 is connected to a power supply (e.g., a 24V power supply). When the expansion valve control switch 1 is closed, the relay coil 211 is energized, so that the first switch 212 and the second switch 213 switch their states. When the expansion valve control switch 1 is not closed, the relay coil 211 is not energized, and the first switch 212 and the second switch 213 remain unchanged.

[0067] According to an exemplary embodiment, one end of the first switch 212 is grounded, and the other end of the first switch 212 serves as the first output end and is electrically connected to the first signal input end. One end of the second switch 213 is grounded, and the other end of the second switch 213 serves as the second output end and is electrically connected to the second signal input end.

[0068] When the relay coil 211 is energized, the first switch 212 switches to a first preset state to input a first start signal to the first signal input terminal, and the second switch 213 switches to a second preset state to input a second start signal to the second signal input terminal.

[0069] When the relay coil 211 is not energized, the first switch 212 switches to the second preset state to input the first shutdown signal to the first signal input terminal, and the second switch 213 switches to the first preset state to input the second shutdown signal to the second signal input terminal.

[0070] Exemplarily, the first switch 212 is a normally open switch, and the second switch 213 is a normally closed switch. When the user controls the first electronic expansion valve 01 to open, the user can rotate the expansion valve control switch 1 so that the expansion valve control switch 1 remains closed. In this case, the relay coil 211 is energized, so that the first switch 212 is closed and the second switch 213 is opened.

[0071] In this way, the other end of the first switch 212 is at a low level, and the first signal input end receives the first opening signal of the low level. The other end of the second switch 213 is at a high level, and the second signal input end receives the second opening signal of the high level. The output end of the driver 22 then outputs a valve opening signal to control the first electronic expansion valve 01 to open.

[0072] When the user controls the first electronic expansion valve 01 to be closed, the user can switch the expansion valve control switch 1 to an open state. In this case, the relay coil 211 loses power, so that the first switch 212 is opened and the second switch 213 is closed.

[0073] In this way, the other end of the first switch 212 is at a high level, and the first signal input end receives a high-level first closing signal. The other end of the second switch 213 is at a low level, and the second signal input end receives a low-level second closing signal. The output end of the driver 22 then outputs a valve closing signal to control the first electronic expansion valve 01 to close.

[0074] It is worth noting that the driver 22 may be a module capable of driving the first electronic expansion valve 01 to open or close, such as an IB-G module, or other modules, as long as they can achieve the corresponding functions, which will not be elaborated here.

[0075] Through the above embodiment, the relay is used as the switch controller 21, and the driver 22 is used to realize the function of automatically controlling the opening or closing of the first electronic expansion valve 01.

[0076] According to some embodiments, the 24V DC power supply may be provided by a power module. Figure 5 FIG. 4 shows a circuit diagram of the power module of the test device. Figure 5 As shown, the power module includes a two-hole plug, a first circuit breaker, a second circuit breaker, and a switching power supply. The live wire end of the two-hole plug is connected to one end of the first circuit breaker, and the other end of the first circuit breaker is connected to the switching power supply. The neutral wire end of the two-hole plug is connected to one end of the second circuit breaker, and one end of the second circuit breaker is connected to the switching power supply. The switching power supply converts the 220V AC power transmitted by the two-hole plug into 24V DC power to provide a 24V DC power supply.

[0077] According to some embodiments, reference Figure 3 The first gas path control module 4 may specifically include a solenoid valve 41 .

[0078] One end of the solenoid valve 41 is electrically connected to one end of the first gas path control switch 3 , the other end of the solenoid valve 41 is grounded, and the other end of the first gas path control switch 3 is connected to a power source (24V DC).

[0079] Exemplarily, the user can press the first gas circuit control switch 3 to close the first gas circuit control switch 3 and generate a first gas circuit connection instruction. When the first gas circuit control switch 3 is closed, the solenoid valve 41 is energized and switches to the first gas circuit state.

[0080] The user can also release the first gas circuit control switch 3, so that the first gas circuit control switch 3 is disconnected and a first gas circuit cut-off instruction is generated. When the first gas circuit control switch 3 is disconnected, the solenoid valve 41 loses power and switches to the second gas circuit state.

[0081] According to an example embodiment, Figure 6 This is the gas circuit connection diagram of the test device for this application. Figure 6 The solenoid valve 41 includes a first gas input port, a second gas input port and a gas output port. The first gas input port is connected to an external gas input device, and the second gas input port is connected to a closed pipe. There is no gas input in the closed pipe. The gas output port is connected to the gas inlet of the first electronic expansion valve 01.

[0082] The first gas path state of the solenoid valve 41 is a state in which the gas path between the first gas input port and the gas output port is connected. The second gas path state of the solenoid valve 41 is a state in which the gas path between the second gas input port and the gas output port is connected.

[0083] According to the exemplary embodiment, the solenoid valve 41 responds to the first gas path connection instruction, so that the solenoid valve 41 switches to the first gas path state, so that the gas path between the first gas input port and the gas output port is connected. In this way, the gas paths between the external gas input device and the gas inlet of the first electronic expansion valve 01 are all in a connected state, and the gas delivered by the external gas input device can be input into the first electronic expansion valve 01.

[0084] According to the exemplary embodiment, the solenoid valve 41 responds to the first gas path cut-off instruction, so that the solenoid valve 41 switches to the second gas path state, so that the gas path between the second gas input port and the gas output port is connected. In this way, the gas path between the external gas input device and the gas inlet of the first electronic expansion valve 01 is in a cut-off state, and the gas inlet of the first electronic expansion valve 01 is connected to the closed pipeline, so that there is no gas input to the gas inlet of the first electronic expansion valve 01.

[0085] Through the solenoid valve 41 and the above-mentioned gas circuit connection method, the present application can automatically respond to the second user's instruction to automatically blow air to the first electronic expansion valve 01 or stop blowing air, thereby improving the convenience of user measurement.

[0086] According to some embodiments, reference Figure 6 The test device further includes a throttling module 11. The throttling module 11 is disposed on the gas path between the gas output port of the solenoid valve 41 and the gas inlet of the first electronic expansion valve 01, and is used to adjust the flow of gas flowing to the first electronic expansion valve 01 to reduce waste caused by excessive gas flow.

[0087] According to some embodiments, reference Figure 7 The test device further comprises a fixing module 10. The fixing module 10 is arranged on the surface of the device body 0 and is used to fix the first electronic expansion valve 01.

[0088] According to an exemplary embodiment, a gas pipeline is provided below the fixing portion, and the gas pipeline is communicated with an external gas input device through the solenoid valve 41 .

[0089] The fixing module 10 is detachably connected to the first electronic expansion valve 01 , and the gas inlet of the first electronic expansion valve 01 is in communication with the gas pipeline to fix the first electronic expansion valve 01 .

[0090] Exemplarily, the fixing module 10 may specifically include a horizontal plate with a hole in the middle, and a pillar. The horizontal plate is fixed to the top surface of the device body 0. The pillar supports the first electronic expansion valve 01. The first electronic expansion valve 01 is plugged into the horizontal plate through the hole of the horizontal plate, and the gas inlet of the first expansion valve is located in the device body 0 and is connected to the gas pipeline to fix the first electronic expansion valve 01, thereby facilitating the detection of the first electronic expansion valve 01.

[0091] According to some embodiments, reference Figure 1 and Figure 7 The first airflow detection module 5 may include a detection object support portion 51 and a detection object. The detection object support portion 51 supports the detection object.

[0092] Exemplarily, the detection object may be a ribbon or other object that can be blown by gas. The detection object support portion 51 may specifically be a ribbon column, and the ribbon is overlapped on the ribbon column.

[0093] According to an exemplary embodiment, the detection object support portion 51 is disposed on the device body 0 and located at the gas outlet of the first electronic expansion valve 01 , so as to use the detection object to detect whether gas flows out of the gas outlet of the first electronic expansion valve 01 .

[0094] Exemplarily, the ribbon is overlapped on the ribbon column, and when the external gas input device blows air to the first electronic expansion valve 01 and the first electronic expansion valve 01 is open, gas flows out of the gas outlet of the first electronic expansion valve 01, and the ribbon will produce a large deformation or displacement, so that the user can judge whether gas flows out of the gas outlet of the first electronic expansion valve 01 according to the condition of the ribbon, that is, the detection object, to judge whether the first electronic expansion valve 01 is open.

[0095] The first airflow detection module 5 of the embodiment of the present application detects whether there is gas flowing out of the gas outlet of the first electronic expansion valve 01 by detecting an object, which is more convenient for users to detect than the manual perception method in the prior art.

[0096] According to some embodiments, reference Figure 2 , Figure 3 , Figure 4 , Figure 6 as well as Figure 7 The testing device may further include a second expansion valve control module 6 , a second gas path control switch 7 , a second gas path control module 8 and a second air flow detection module 9 .

[0097] The second expansion valve control module 6 is arranged inside the device body 0, is electrically connected to the expansion valve control switch 1, and is electrically connected to the second electronic expansion valve 02, responds to the expansion valve opening instruction generated by the expansion valve control switch 1 to control the second electronic expansion valve 02 to open, and responds to the expansion valve closing instruction generated by the expansion valve control switch 1 to control the second electronic expansion valve 02 to close.

[0098] It is worth noting that the second expansion valve control module 6 has the same function and structure as the first expansion valve control module 2, and is a plurality of parallel devices arranged in a system, which will not be described in detail here.

[0099] According to the exemplary embodiment, the second gas circuit control switch 7 is arranged on the surface of the device body 0. The second gas circuit control module 8 is arranged inside the device body 0, and one end of the second gas circuit control module 8 is connected to the gas inlet of the second electronic expansion valve 02, and the other end is connected to the external gas input device. The second air flow detection module 9 is arranged on the surface of the device body 0 and is located at the gas outlet of the second electronic expansion valve 02.

[0100] According to the exemplary embodiment, the second gas circuit control switch 7 generates a second gas circuit connection instruction or a second gas circuit cut-off instruction in response to a third user instruction. The second gas circuit control module 8 is electrically connected to the second gas circuit control switch 7, and controls the gas circuit connection between the second electronic expansion valve 02 and the external gas input device in response to the second gas circuit connection instruction; and controls the gas circuit cut-off between the second electronic expansion valve 02 and the external gas input device in response to the second gas circuit cut-off instruction.

[0101] The second airflow detection module 9 detects whether there is gas flowing out of the gas outlet of the second electronic expansion valve 02 to detect the switch state of the second electronic expansion valve 02 .

[0102] Exemplarily, the second gas circuit control switch 7 is the same as the first gas circuit control switch 3, the second gas circuit control module 8 is the same as the first gas circuit control module 4, and the second air flow detection module 9 is the same as the first air flow detection module 5, which will not be described in detail here.

[0103] It is worth noting that the testing device may also include a third expansion valve control module, a third gas circuit control switch, a third gas circuit control module and a third air flow detection module to control the automatic opening and closing of the third electronic expansion valve and detect the switch state of the third electronic expansion valve.

[0104] That is, the test device can detect the switching status of multiple electronic expansion valves at the same time, and is not limited to testing one, two or three electronic expansion valves at the same time. The test device only needs to set a corresponding number of expansion valve control modules, gas circuit control switches, gas circuit control modules and airflow detection modules, which will not be elaborated here.

[0105] According to another aspect of the present application, an embodiment of the present application provides a testing system for an electronic expansion valve.

[0106] The test system may specifically include the test device described in the above embodiment and a first electronic expansion valve.

[0107] According to an example embodiment, the testing device includes a device body, an expansion valve control switch, a first expansion valve control module, a first gas path control switch, a first gas path control module, and a first air flow detection module.

[0108] The expansion valve control switch is arranged on the surface of the device body, and generates an expansion valve opening instruction or an expansion valve closing instruction in response to a first user instruction. The first expansion valve control module is arranged inside the device body, and is electrically connected to the expansion valve control switch and the first electronic expansion valve, respectively, and responds to the expansion valve opening instruction or the expansion valve closing instruction to control the first electronic expansion valve to open or close.

[0109] The first gas circuit control switch is arranged on the surface of the device body, and generates a first gas circuit connection instruction or a first gas circuit cut-off instruction in response to the second user instruction. The first gas circuit control module is arranged inside the device body, and one end of the first gas circuit control module is connected to the gas inlet of the first electronic expansion valve, and the other end is connected to the external gas input device. The first gas circuit control module is also electrically connected to the first gas circuit control switch, and responds to the first gas circuit connection instruction or the first gas circuit cut-off instruction to control the connection or cut-off of the gas circuit between the first electronic expansion valve and the external gas input device.

[0110] The first airflow detection module is arranged on the device body and located at the gas outlet of the first electronic expansion valve to detect whether there is gas flowing out of the gas outlet of the first electronic expansion valve to determine the switch state of the first electronic expansion valve.

[0111] According to some embodiments, the first expansion valve control module includes a switch controller and a driver.

[0112] The switch controller is electrically connected to the expansion valve control switch, and outputs a first opening signal and a second opening signal in response to an expansion valve opening instruction, and outputs a first closing signal and a second closing signal in response to an expansion valve closing instruction.

[0113] The driver includes a first signal input terminal, a second signal input terminal and an output terminal.

[0114] When the switch controller outputs the first opening signal and the second opening signal, the first signal input terminal receives the first opening signal, the second signal input terminal receives the second opening signal, and the output terminal outputs the valve opening signal to control the first electronic expansion valve to open.

[0115] When the switch controller outputs the first closing signal and the second closing signal, the first signal input terminal receives the first closing signal, the second signal input terminal receives the second closing signal, and the output terminal outputs the valve closing signal to control the first electronic expansion valve to close.

[0116] According to some embodiments, the switch controller includes a relay, the relay including a relay coil, a first switch, and a second switch.

[0117] One end of the relay coil is connected to one end of the expansion valve control switch, the other end of the expansion valve control switch is connected to the power supply, and the other end of the relay coil is grounded. One end of the first switch is grounded, and the other end of the first switch is connected to the first signal input end. The second switch, one end of the second switch is grounded, and the other end of the second switch is connected to the second signal input end.

[0118] When the relay coil is energized, the first switch switches to a first preset state to input a first start signal to the first signal input terminal, and the second switch switches to a second preset state to input a second start signal to the second signal input terminal.

[0119] When the relay coil is not energized, the first switch switches to the second preset state to input a first shutdown signal to the first signal input terminal, and the second switch switches to the first preset state to input a second shutdown signal to the second signal input terminal.

[0120] According to some embodiments, the first gas circuit control module includes a solenoid valve, one end of which is connected to one end of the first gas circuit control switch, the other end of which is grounded, and the other end of which is connected to a power source.

[0121] The solenoid valve comprises a first gas input port, a second gas input port and a gas output port. The first gas input port is connected to an external gas input device. The second gas input port is connected to a closed pipeline. The gas output port is connected to a gas inlet of the first electronic expansion valve.

[0122] The solenoid valve responds to the first gas path connection instruction to connect the gas path between the first gas input port and the gas output port, so that the external gas input device and the gas inlet of the first electronic expansion valve are in a connected state.

[0123] The solenoid valve responds to the first gas path cut-off instruction to connect the gas path between the second gas input port and the gas output port, so that the external gas input device and the gas inlet of the first electronic expansion valve are in a cut-off state.

[0124] According to some embodiments, the first airflow detection module includes a detection object support portion and a detection object, the detection object support portion supports the detection object; the detection object support portion is arranged on the device body and is located at the gas outlet of the first electronic expansion valve, so as to use the detection object to detect whether there is gas flowing out of the gas outlet of the first electronic expansion valve.

[0125] According to some embodiments, the test system may further include a second electronic expansion valve. The test device may further include a second expansion valve control module, a second gas path control switch, a second gas path control module, and a second air flow detection module.

[0126] The second expansion valve control module is arranged inside the device body, electrically connected to the expansion valve control switch, and electrically connected to the second electronic expansion valve, responding to the expansion valve opening instruction or the expansion valve closing instruction, and controlling the second electronic expansion valve to open or close. The second gas path control switch is arranged on the surface of the device body, responding to the third user instruction, generating a second gas path connection instruction or a second gas path cut-off instruction. The second gas path control module is arranged inside the device body, one end of the second gas path control module is connected to the gas inlet of the second electronic expansion valve, and the other end is connected to the external gas input device. The second gas path control module is electrically connected to the second gas path control switch, responding to the second gas path connection instruction or the second gas path cut-off instruction, and controlling the gas path between the second electronic expansion valve and the external gas input device to be connected or cut off. The second air flow detection module is arranged on the surface of the device body and located at the gas outlet of the second electronic expansion valve to detect whether there is gas flowing out of the gas outlet of the second electronic expansion valve.

[0127] Finally, it should be noted that the above are only preferred embodiments of the present application and are not intended to limit the present application. Although the present application is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions of the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A testing device for an electronic expansion valve, characterized in that: The testing device comprises: device body; An expansion valve control switch, disposed on the surface of the device body, generates an expansion valve opening instruction or an expansion valve closing instruction in response to a first user instruction; a first expansion valve control module, disposed inside the device body, electrically connected to the expansion valve control switch and the first electronic expansion valve, respectively, and responding to the expansion valve opening instruction or the expansion valve closing instruction to control the first electronic expansion valve to open or close; A first gas path control switch, disposed on the surface of the device body, generates a first gas path connection instruction or a first gas path cutoff instruction in response to a second user instruction; A first gas circuit control module is arranged inside the device body, one end of the first gas circuit control module is connected to the gas inlet of the first electronic expansion valve, and the other end is connected to an external gas input device; The first gas circuit control module is also electrically connected to the first gas circuit control switch, and responds to the first gas circuit connection instruction or the first gas circuit cutoff instruction to control the connection or cutoff of the gas circuit between the first electronic expansion valve and the external gas input device; The first airflow detection module is arranged on the device body and located at the gas outlet of the first electronic expansion valve, and detects whether there is gas flowing out of the gas outlet of the first electronic expansion valve to determine the switch state of the first electronic expansion valve.

2. The testing device according to claim 1, characterized in that: The first expansion valve control module comprises: A switch controller, electrically connected to the expansion valve control switch, outputs a first opening signal and a second opening signal in response to the expansion valve opening instruction, and outputs a first closing signal and a second closing signal in response to the expansion valve closing instruction; A driver, comprising a first signal input terminal, a second signal input terminal and an output terminal; In the case where the switch controller outputs a first opening signal and a second opening signal, the first signal input terminal receives the first opening signal, the second signal input terminal receives the second opening signal, and the output terminal outputs a valve opening signal to control the first electronic expansion valve to open; and When the switch controller outputs a first closing signal and a second closing signal, the first signal input terminal receives the first closing signal, the second signal input terminal receives the second closing signal, and the output terminal outputs a valve closing signal to control the first electronic expansion valve to close.

3. The testing device according to claim 2, characterized in that: The switch controller includes a relay, and the relay includes: a relay coil, one end of the relay coil being connected to one end of the expansion valve control switch, the other end of the expansion valve control switch being connected to a power supply, and the other end of the relay coil being grounded; a first switch, one end of which is grounded, and the other end of which is connected to the first signal input end; a second switch, one end of the second switch being grounded, and the other end of the second switch being connected to the second signal input end; Wherein, when the relay coil is powered on, the first switch is switched to a first preset state to input a first start signal to the first signal input terminal, and the second switch is switched to a second preset state to input a second start signal to the second signal input terminal; When the relay coil is not energized, the first switch switches to a second preset state to input a first shutdown signal to the first signal input terminal, and the second switch switches to the first preset state to input a second shutdown signal to the second signal input terminal.

4. The testing device according to claim 1, characterized in that: The first gas path control module comprises: A solenoid valve, one end of which is connected to one end of the first gas path control switch, the other end of which is grounded, and the other end of which is connected to a power supply; The solenoid valve comprises: A first gas input port, connected to the external gas input device; A second gas input port connected to a closed pipeline; A gas output port, connected to the gas inlet of the first electronic expansion valve; The solenoid valve responds to the first gas path connection instruction to connect the gas path between the first gas input port and the gas output port, so that the external gas input device and the gas inlet of the first electronic expansion valve are in a connected state; The solenoid valve responds to the first gas path cutoff instruction to connect the gas path between the second gas input port and the gas output port, so that the external gas input device and the gas inlet of the first electronic expansion valve are in a cutoff state.

5. The testing device according to claim 4, characterized in that: The testing device also includes: The throttling module is arranged on the gas pipeline between the gas output port of the solenoid valve and the first electronic expansion valve to adjust the flow rate of the gas flowing to the first electronic expansion valve.

6. The testing device according to claim 1, characterized in that: The testing device also includes: A fixing module is arranged on the surface of the device body, a gas pipeline is arranged below the fixing module, and the gas pipeline is connected to the external gas input device; The fixing module is detachably connected to the first electronic expansion valve, and a gas inlet of the first electronic expansion valve is in communication with the gas pipeline to fix the first electronic expansion valve.

7. The testing device according to claim 1, characterized in that: The first airflow detection module includes a detection object support portion and a detection object, wherein the detection object support portion supports the detection object; The detection object support portion is arranged on the device body and is located at the gas outlet of the first electronic expansion valve, so as to detect whether there is gas flowing out of the gas outlet of the first electronic expansion valve through the detection object.

8. The testing device according to claim 1, characterized in that: The testing device also includes: a second expansion valve control module, disposed inside the device body, electrically connected to the expansion valve control switch and to the second electronic expansion valve, and responding to the expansion valve opening instruction or the expansion valve closing instruction to control the second electronic expansion valve to open or close; A second gas path control switch is disposed on the surface of the device body and generates a second gas path connection instruction or a second gas path cutoff instruction in response to a third user instruction; A second gas circuit control module is arranged inside the device body, one end of the second gas circuit control module is connected to the gas inlet of the second electronic expansion valve, and the other end is connected to the external gas input device; The second gas path control module is electrically connected to the second gas path control switch, and controls the connection or cutoff of the gas path between the second electronic expansion valve and the external gas input device in response to the second gas path connection instruction or the second gas path cutoff instruction; The second airflow detection module is arranged on the surface of the device body and located at the gas outlet of the second electronic expansion valve to detect whether there is gas flowing out of the gas outlet of the second electronic expansion valve.

9. A testing system for an electronic expansion valve, characterized in that: The test system comprises a first electronic expansion valve and a test device as claimed in any one of claims 1 to 7; or, The device comprises a first electronic expansion valve, a second electronic expansion valve and the testing device as claimed in claim 8.

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