Reset circuit of magnetic latching relay, air conditioning system and control method of air conditioning system

Abstract

The invention discloses a reset circuit of a magnetic latching relay, an air conditioning system and a control method of the air conditioning system, the reset circuit comprises a signal generation module and an adjusting circuit, and the signal generation module is used for generating a control signal under the condition of vibration; the input end of the adjusting circuit is connected with the signal generation module, the output end of the adjusting circuit is connected with a coil of the magnetic latching relay, and the adjusting circuit is used for adjusting the received control signal into a reset signal and applying the reset signal to the coil to reset the magnetic latching relay. By means of the characteristic that the signal generation module generates a control signal after being vibrated, the adjusting circuit sends a reset signal to a coil of the magnetic latching relay based on the control signal, and the reset signal enables the magnetic latching relay to reset. Therefore, the magnetic latching relay cannot be kept in a closed state even if the magnetic latching relay is vibrated to a certain degree in the transportation process, and the problem that the magnetic latching relay is powered on to damage the magnetic latching relay when the magnetic latching relay is in the closed state is avoided.

Description

Technical Field

[0001] The present application relates to the field of electronic circuits, and in particular to a reset circuit of a magnetic latching relay, an air conditioning system and a control method thereof. Background Art

[0002] In the air conditioning system, the on and off of the high current circuit is controlled by the closing and opening of the relay. The traditional relay needs a continuous channel to maintain the closed state. When the air conditioning system works for a long time, the relay needs to consume a certain amount of power. In the related technology, the magnetic latching relay is used to replace the traditional relay. After the magnetic latching relay is triggered to close, it can maintain the closed state without continuous power supply.

[0003] However, the disadvantage of the magnetic latching relay is that it may change its switch state after being subjected to strong vibration. It is impossible to detect whether the magnetic latching relay has changed its state when it is not powered on. When the magnetic latching relay is used in the power supply circuit of the air-conditioning system, if the magnetic latching relay is closed due to vibration during the transportation of the product, a huge current will appear when the air-conditioning system is powered on, which may easily damage the circuit of the air-conditioning system. Summary of the invention

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a reset circuit of a magnetic latching relay, an air conditioning system and a control method thereof, which can prevent the magnetic latching relay from being vibrated and remaining in a closed state.

[0005] An embodiment of the first aspect of the present application provides a reset circuit of a magnetic latching relay, comprising:

[0006] A signal generating module, used for generating a control signal when subjected to vibration;

[0007] An adjustment circuit, wherein the input end of the adjustment circuit is connected to the signal generating module, and the output end of the adjustment circuit is connected to the coil of the magnetic latching relay. The adjustment circuit is used to adjust the received control signal into a reset signal, and apply the reset signal to the coil of the magnetic latching relay to reset the magnetic latching relay.

[0008] The reset circuit of the magnetic latching relay of the first aspect of the present application has at least the following beneficial effects: utilizing the characteristic of the signal generating module to generate a control signal after being vibrated, the control signal is sent to the adjustment circuit, and the adjustment circuit sends a reset signal to the coil of the magnetic latching relay based on the control signal. The reset signal resets the magnetic latching relay, which ensures that the magnetic latching relay will not remain in a closed state even if the equipment is subjected to a certain degree of vibration during transportation, because the magnetic latching relay can be triggered to reset by the signal generating module, thereby avoiding the problem of damaging the equipment when the magnetic latching relay is powered on when it becomes closed.

[0009] According to some embodiments of the present application, the signal generating module is a pulse power supply, and the pulse power supply is used to generate a pulse signal when subjected to vibration, and the reset signal is a trigger signal corresponding to the pulse signal.

[0010] According to some embodiments of the present application, the pulse power supply includes an induction coil and a vibration induction mechanism, wherein the vibration induction mechanism is used to generate a magnetic field and change the distribution of the magnetic field when vibrated, so as to induce the pulse signal in the induction coil, and the induction coil is connected to the input end of the adjustment circuit.

[0011] According to some embodiments of the present application, the vibration sensing mechanism includes a permanent magnet, a rotating shaft and an armature, the magnetic poles of the permanent magnet are distributed in the up and down directions, the armature passes through the induction coil, and the two ends of the armature are respectively arranged on the left and right sides of the permanent magnet. When the permanent magnet is vibrated, it rotates around the rotating shaft between the two ends of the armature.

[0012] According to some embodiments of the present application, the permanent magnet includes a first end and a second end extending from the S pole, and also includes a third end and a fourth end extending from the N pole, a groove-like structure is formed between the first end and the third end to accommodate one end of the armature, and a groove-like structure is formed between the second end and the fourth end to accommodate the other end of the armature.

[0013] According to some embodiments of the present application, the groove width of the groove-like structure is greater than the width of the end of the armature, and a gap is left between the groove bottom of the groove-like structure and the end of the armature.

[0014] According to some embodiments of the present application, the magnetic holding relay includes a reset coil, the adjustment circuit includes a rectifier module and a switch tube, one end of the rectifier module is connected to a tap of the reset coil through the switch tube, and the other end of the rectifier module is connected to another tap of the reset coil.

[0015] According to some embodiments of the present application, the rectifier module includes a first bridge arm and a second bridge arm connected in parallel, the first bridge arm includes a first diode and a second diode connected in series, the second bridge arm includes a third diode and a fourth diode connected in series, the first diode, the second diode, the third diode and the fourth diode have the same direction, one end of the signal generating module is connected to the input point of the first bridge arm, and the other end of the signal generating module is connected to the input point of the second bridge arm.

[0016] According to some embodiments of the present application, the adjustment circuit also includes a target switch, a tap of the reset coil is connected to the switch tube through the target switch, the target switch is arranged outside the device for operation, and the device is a device including the reset circuit.

[0017] A second aspect of the present application provides a control method for an air conditioning system, the air conditioning system comprising a magnetic latching relay and the reset circuit according to the first aspect of the present application, the reset coil of the magnetic latching relay being connected to the reset circuit via a switch tube; the control method comprising:

[0018] Receiving an operation instruction, and determining a power supply circuit that needs to be activated by the operation instruction;

[0019] When the magnetic latching relay connected to the reset circuit exists in the power supply circuit, the switch tube is controlled to disconnect the reset circuit from the magnetic latching relay.

[0020] The control method of the second aspect of the present application has at least the following beneficial effects: a magnetic latching relay and the aforementioned reset circuit are arranged in the air-conditioning system, so as to avoid the problem of excessive current after the air-conditioning system is powered on, which may cause the magnetic latching relay to close due to vibration during transportation and cause damage to the air-conditioning system; after the air-conditioning system is installed, when the air-conditioning system is started, if it is determined according to the operating instructions that it is necessary to enable the power supply circuit provided with the magnetic latching relay, the connection between the reset circuit and the magnetic latching relay is disconnected by the switch tube, so as to avoid the reset circuit being mistakenly triggered and resetting the magnetic latching relay, thereby affecting the normal use of the air-conditioning system.

[0021] According to some embodiments of the present application, the control method further includes:

[0022] When a shutdown command is received, the switch tube is controlled to reconnect the reset circuit and the magnetic latching relay.

[0023] The third aspect of the present application provides a controller, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the control method described in the second aspect above when running the computer program.

[0024] A fourth aspect of the present application provides a computer-readable storage medium storing computer-executable instructions, wherein the computer-executable instructions are used to execute the control method as described in the second aspect above.

[0025] The fourth aspect of the present application provides an air conditioning system, comprising the reset circuit described in the first aspect or the controller described in the third aspect.

[0026] Other features and advantages of the present application will be described in the following description, and partly become apparent from the description, or understood by practicing the present application. The purpose and other advantages of the present application can be realized and obtained by the structures specifically pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is an overall circuit diagram provided by an embodiment of the present application;

[0028] Figure 2 It is a structural schematic diagram of a pulse power supply provided in an embodiment of the present application under a directional magnetic circuit;

[0029] Figure 3 It is a structural schematic diagram of another direction magnetic circuit of the pulse power supply provided by an embodiment of the present application;

[0030] Figure 4 is a structural schematic diagram of a vibration sensing mechanism provided in an embodiment of the present application;

[0031] Figure 5 is a flow chart of a control method provided by an embodiment of the present application;

[0032] Figure 6 It is another flow chart of the control method provided in the embodiment of the present application. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application is further described in detail below in conjunction with the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application. In addition, the characteristics, operations or features described in the specification can be combined in any appropriate manner to form various implementation methods. At the same time, the steps or actions in the method description can also be replaced or adjusted in order in a manner that is obvious to those skilled in the art. Therefore, the various sequences in the specification and the accompanying drawings are only for the purpose of clearly describing a certain embodiment and are not meant to be a necessary sequence, unless otherwise specified that a certain sequence must be followed.

[0034] In the description of this application, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0035] The serial numbers of the components in this document, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings).

[0036] Traditional relays mainly include a coil, an iron core, a moving contact and a static contact. The metal wire in the coil is wound along the surface of the iron core to form a coil. The moving contact and the static contact are connected to the off-circuit position in the circuit. When the coil is energized, the current in the coil induces a magnetic field to magnetize the iron core. The iron core attracts the armature where the moving contact is located to make it move, contact the static contact, and connect the off-circuit position in the circuit. When the coil is no longer energized, the iron core loses its magnetization, and the circuit returns to the off-circuit state, thereby realizing the switching function in the circuit.

[0037] It can be seen that the traditional relay needs to keep the power supply to the coil to keep the circuit connected. In some equipment that needs to work for a long time, such as air conditioners, the relay will consume a certain amount of electricity if it remains closed, which is not conducive to reducing energy consumption. Therefore, a magnetic latching relay has appeared on the market. The magnetic latching relay generally has two sets of coils, one set is a closing coil and the other set is a reset coil. A permanent magnet is set in the magnetic latching relay; when the closing coil is energized, the direction of the magnetic field is the same as the direction of the magnetic field of the permanent magnet, and the magnetic latching relay is attracted to connect the circuit. At this time, under the action of the permanent magnet, even if the closing coil is stopped, the magnetic latching relay can continue to maintain the attracted state. When the magnetic latching relay needs to be disconnected, the reset coil is energized, and the reset coil generates a magnetic field direction opposite to the permanent magnet, causing the relay to disconnect the circuit. In this way, only a short pulse signal is needed to control the closing and opening of the magnetic latching relay, and it is not necessary to keep it energized all the time, thereby reducing the power consumption of the equipment.

[0038] However, when the magnetic latching relay is vibrated, it may switch between the closed and open states. For example, when the equipment is transported, the magnetic latching relay is vibrated and becomes closed. At this time, when the equipment is powered on, a huge current will appear in the circuit where the magnetic latching relay is located, which may easily cause damage to the equipment. Without disassembling the equipment, the magnetic latching relay cannot be detected whether it is in the open or closed state before powering on. Therefore, how to ensure that the magnetic latching relay is in the open state before the equipment is powered on is an urgent problem to be solved.

[0039] Based on this, the embodiments of the present application provide a reset circuit of a magnetic holding relay, an air-conditioning system and a control method thereof, wherein a pulse power supply is connected to the reset coil of the magnetic holding relay. The pulse power supply generates a pulse signal after inducing a certain degree of vibration, triggering the reset coil to return the magnetic holding relay to the disconnected state. Therefore, it can be ensured that the magnetic holding relay can be reset to the disconnected state even when subjected to vibration, thereby ensuring the safe power-on of the equipment.

[0040] The embodiments of the present application are further described below in conjunction with the accompanying drawings.

[0041] like Figure 1 As shown, Figure 1 : is a system architecture diagram of a reset circuit provided by an embodiment of the present application, and the reset circuit includes:

[0042] A signal generating module, used for generating a control signal when subjected to vibration;

[0043] The adjustment circuit has an input end connected to the signal generating module, and an output end connected to the coil of the magnetic latching relay K1. The adjustment circuit is used to adjust the received control signal into a reset signal, and apply the reset signal to the coil of the magnetic latching relay K1 to reset the magnetic latching relay K1.

[0044] The signal generation module is used to sense external vibrations and can output corresponding signals according to the external vibration conditions. For example, when subjected to a certain degree of vibration, the signal generation module can generate a control signal, and no control signal is generated when the vibration degree is less than the certain degree. The control signal can be a pulse signal, which is generated instantly after being vibrated, or it can be a continuously output signal, which switches to a high level output for a long period of time after being vibrated. This control signal is adapted to the adjustment circuit. When the control signal is a pulse signal, the adjustment circuit outputs a trigger signal based on the pulse signal. When the control signal is a continuously output level signal, the adjustment circuit outputs a level signal for a period of time based on the level signal, and so on. Examples are not given one by one here.

[0045] As mentioned above, the magnetic holding relay K1 uses a closing coil and a reset coil to achieve closing and opening. In some magnetic holding relays, a single coil is used, and currents in different directions are passed through the coil to achieve closing and opening. Therefore, for how the coil of the magnetic holding relay in the embodiment of the present application is connected to the adjustment circuit, there are actually two corresponding methods. In the case of a single coil, the adjustment circuit connects the two taps of the coil, and requires that the current direction of the reset signal output by the adjustment circuit corresponds to the current direction required to control the magnetic holding relay to open. In the case where the closing coil and the reset coil are independent, the adjustment circuit connects the two taps of the reset coil, and outputs the reset signal in the current direction required by the reset coil.

[0046] The following embodiments are described according to the magnetic holding relay K1 having a reset coil. In addition, the signal generating module outputs a pulse signal as an example, that is, the signal generating module is a pulse power supply S1, and the pulse power supply S1 is used to generate a pulse signal when subjected to vibration, and the reset signal is a trigger signal corresponding to the pulse signal.

[0047] The pulse power supply S1 is used to sense external vibrations and determine whether to output a pulse signal based on the magnitude of the vibration. The pulse signal is adjusted to generate a trigger signal through the circuit, which can be applied to the reset coil of the magnetic latching relay K1 to force the magnetic latching relay K1 to return to the reset state (i.e., disconnected state). The pulse power supply S1 can set the force threshold of its force output pulse signal according to actual needs. When the pulse power supply S1 is subjected to a force exceeding the force threshold in a certain direction (this force is caused by external vibration), the pulse power supply S1 outputs a pulse signal.

[0048] Since the pulse power supply S1 and the magnetic holding relay K1 are both installed in the device, when the device is subjected to a certain degree of vibration (generally, the acceleration of the vibration is above 30g (g=9.8m / s2) and there is a possibility of changing the closed state of the magnetic holding relay K1, so a certain degree of vibration here can be defined as vibration above 20g), such as vibration during transportation, the force states of the pulse power supply S1 and the magnetic holding relay K1 are basically the same. When the force threshold of the pulse power supply S1 is set to be less than or equal to the force required for the magnetic holding relay K1 to change its state, the magnetic holding relay K1 can trigger the reset coil in this vibration to reset the magnetic holding relay K1, thereby ensuring that the magnetic holding relay K1 will not become closed when subjected to vibration, thereby ensuring the safety of power-on of the device. It is understandable that the force of the vibration mentioned above actually includes direction. In certain directions, the vibration will not change the state of the magnetic latching relay K1, nor will it cause the pulse power supply S1 to generate a pulse signal, even if the force of the vibration is greater than the force threshold of the pulse power supply S1. For example, since the force of the vibration during transportation is mainly in the direction of gravity and its vicinity, and if the moving contact and the static contact of the magnetic latching relay K1 are also distributed along the direction of gravity, then if the device is subjected to a lateral force (such as a horizontal force), the state of the magnetic latching relay K1 will not change. Of course, in the above case, the pulse power supply S1 can still be configured to generate a pulse signal (for example, the pulse power supply S1 has an acceleration sensor and is powered by an independent battery) to ensure that the magnetic latching relay K1 remains in the reset state.

[0049] It can be understood that, depending on the different electrical components in the adjustment circuit, the adjustment circuit has different functions, which are used to cooperate with the pulse signal output by the pulse power supply S1; for example, the voltage of the pulse signal of the pulse power supply S1 does not match the rated voltage of the reset coil, and the adjustment circuit is used to shape the pulse signal to obtain a trigger signal suitable for the rated voltage of the reset coil; for another example, the pulse power supply S1 may output voltages / currents in different directions according to different vibration directions, and the adjustment circuit is used to rectify the pulse signal to obtain a voltage / current in a fixed direction; in short, the adjustment circuit is used to transform the pulse signal to be suitable for triggering the reset coil to ensure that the reset action of the magnetic holding relay K1 can be triggered.

[0050] In some embodiments, the pulse power supply S1 includes an induction coil 100 and a vibration sensing mechanism, the vibration sensing mechanism is used to generate a magnetic field and change the distribution of the magnetic field when it is vibrated to induce a pulse signal in the induction coil 100, and the induction coil 100 is connected to the input end of the adjustment circuit.

[0051] The vibration sensing mechanism generates a magnetic field and can change the distribution of the magnetic field due to external vibration. When the distribution of the magnetic field changes, the magnetic flux in the induction coil 100 changes, so that a current, i.e., a pulse signal, is induced in the induction coil 100. The change in the distribution of the magnetic field can be that the intensity of the magnetic field remains unchanged but the overall position of the magnetic field moves, i.e., the induction coil 100 is displaced relative to the magnetic field, thus causing the magnetic flux to change, or the overall position of the magnetic field remains unchanged but the intensity of the magnetic field changes, which also causes the magnetic flux in the induction coil 100 to change. There are many ways to achieve the change in the distribution of the magnetic field after being subjected to external vibration. The specific structure of the vibration sensing mechanism will be described below through some embodiments.

[0052] like Figure 2 and 3 As shown, in some embodiments, the vibration sensing mechanism includes a permanent magnet 300, a rotating shaft 400 and an armature 200. The rotating shaft 400 penetrates into the middle area of ​​the permanent magnet 300. The magnetic poles of the permanent magnet 300 are distributed in the up and down directions. The armature 200 passes through the induction coil 100. The two ends of the armature 200 are respectively arranged on the left and right sides of the permanent magnet 300. When the permanent magnet 300 is vibrated, it rotates around the rotating shaft 400 between the two ends of the armature 200.

[0053] The vibration sensing mechanism rotates the permanent magnet 300 on the rotating shaft 400, causing the two poles of the permanent magnet 300 to rotate to the left or right, thereby contacting the two ends of the armature 200 to achieve magnetic circuit switching. Therefore, it can be seen that the armature 200 is surrounded by a ring or a ring-like shape and passes through the center of the induction coil 100. The two ends of the armature 200 do not touch each other and a permanent magnet 300 is arranged between the two ends of the armature 200. The permanent magnet 300 is fixed on the rotating shaft 400 and the magnetic poles are distributed in the up and down direction; under the gravity state, the permanent magnet 300 is kept in the vertical direction in an ideal state, not tilting to the left or right, but in actual application, due to the sideways tilt of the equipment during transportation or the fact that the rotating shaft 400 does not accurately pass through the center of mass of the permanent magnet 300, the permanent magnet 300 is prone to tilt to the left or right on the rotating shaft 400 (with Figure 2 and 3 The left and right directions in the figure are used as an example for direction reference), thereby contacting the two ends of the armature 200; the permanent magnet 300 is tilted to the left and the permanent magnet 300 is tilted to the right. Since the two poles of the permanent magnet 300 contact the two ends of the armature 200 at different positions, magnetic circuits of different directions can be formed on the armature 200. Therefore, it can be known that the rotation of the permanent magnet 300 is limited in range, and the permanent magnet 300 cannot swing more than 180 degrees to the left and right. In addition, in order to make it easy for the permanent magnet 300 to change the swing direction, the rotating shaft 400 should pass through the middle area of ​​the permanent magnet 300, such as the center of mass position. Of course, the shape of the permanent magnet 300 is not necessarily regular. For the special-shaped permanent magnet 300, the position where the rotating shaft 400 passes can be set according to actual needs.

[0054] Specifically, in order to make the permanent magnet 300 contact with the armature 200, the permanent magnet 300 includes a first end 310 and a second end 320 led out from the S pole, and also includes a third end 330 and a fourth end 340 led out from the N pole. A groove-like structure is formed between the first end 310 and the third end 330 to accommodate one end of the armature 200, and a groove-like structure is formed between the second end 320 and the fourth end 340 to accommodate the other end of the armature 200.

[0055] Reference Figure 2 and 3As shown in the cross-sectional view, the upper part of the permanent magnet 300 is the S pole, and the lower part is the N pole. The cross-section of the permanent magnet 300 is an I-shaped, and the left and right sides of the S pole are the first end 310 and the second end 320 respectively, and the left and right sides of the N pole are the third end 330 and the fourth end 340 respectively. Therefore, the first end 310 and the third end 330 are located on the same side, and a groove-like structure is formed between the two. Similarly, the second end 320 and the fourth end 340 are located on the same side, and a groove-like structure is formed between the two. The groove-like structures on both sides of the permanent magnet 300 are used to accommodate the two ends of the armature 200, so that the ends of the armature 200 are stuck in the groove-like structure and leave space for the permanent magnet 300 to rotate. In this way, when the permanent magnet 300 tilts to the left, the first end 310 contacts the left end of the armature 200, the fourth end 340 contacts the right end of the armature 200, the second end 320 and the third end 330 are suspended, and the magnetic circuit is counterclockwise. Refer to Figure 2 When the permanent magnet 300 is tilted to the right, the third end 330 contacts the left end of the armature 200, and the second end 320 contacts the right end of the armature 200, and the magnetic circuit is clockwise, referring to Figure 3 Therefore, when the permanent magnet 300 is vibrated to change its tilting direction, the reset coil can be triggered to reset the magnetic latching relay K1.

[0056] Reference Figure 2 and 3 It can be seen that the slot width of the slot structure is greater than the width of the end of the armature 200, and a gap is left between the slot bottom of the slot structure and the end of the armature 200. By clamping the two ends of the armature 200 with such a structure, the permanent magnet 300 will not rotate to an unnecessary position.

[0057] The vibration sensing mechanism in this embodiment realizes the generation of pulse signals based on the switching of the magnetic circuit. When subjected to a certain degree of vibration, the magnetic circuit inside the vibration sensing mechanism switches from one direction to another, which changes the direction of the magnetic field applied to the induction coil 100. At this time, the induction coil 100 induces a current, and then outputs the current to the adjustment circuit. This current is a pulse signal. It can be understood that the magnetic circuit of the vibration sensing mechanism passes through the induction coil 100 in space, for example, the magnetic circuit penetrates the center of the induction coil 100, that is, the metal wire of the induction coil 100 is wound into a coil along both sides of the magnetic circuit; when the magnetic circuit changes direction, the direction of the magnetic field at the center of the induction coil 100 changes, the magnetic flux changes, and the induction coil 100 generates a current and outputs the current through the adjustment circuit. It can be understood that since the direction of the magnetic field passing through the induction coil 100 changes, the direction of the induced current of the induction coil 100 is different according to the direction before and after the magnetic field changes. Therefore, each time the direction of the magnetic circuit is switched, the current direction at the input end of the adjustment circuit is changed.

[0058] Based on this, in some embodiments, the adjustment circuit includes a rectifier module and a switch tube Qz1, one end of the rectifier module is connected to a tap of the reset coil through the switch tube Qz1, and the other end of the rectifier module is connected to another tap of the reset coil.

[0059] The reset coil of the magnetic latching relay K1 is used to induce a magnetic field in the opposite direction to the magnetic field corresponding to the closed state, and the two ends of the adjustment circuit are respectively connected to the two taps of the reset coil, so the connection mode on the circuit is fixed, then the adjustment circuit needs to adjust the direction of the pulse signal of the pulse power supply S1, so that the current direction of the trigger signal output by the adjustment circuit is fixed in a certain direction, so that the reset coil induces a magnetic field in the required direction. Therefore, the adjustment circuit in this embodiment includes a rectifier module, which can rectify pulse signals of different directions into currents of a certain direction, and the rectifier output current is the trigger signal. Among them, the adjustment circuit also includes a switch tube Qz1, the function of the switch tube Qz1 is to control whether the adjustment circuit is connected to the reset coil. When the pulse power supply S1 is not needed to trigger the reset of the magnetic latching relay K1 (for example, the equipment has been installed on the ground), the switch tube Qz1 can be controlled to be disconnected, and the adjustment circuit will not output a pulse signal to the reset coil, so as to ensure that the equipment can work normally.

[0060] In some embodiments, the vibration sensing mechanism includes a permanent magnet 300 and a moving component 500. The moving component 500 drives the permanent magnet 300 to move when it is vibrated to change the distribution of the magnetic field. In this embodiment, the moving component 500 can be a clamping mechanism for fixing the permanent magnet 300. The clamping mechanism has a guide rail and moves along the guide rail when it is vibrated, which changes the position of the magnetic field of the permanent magnet 300, thereby changing the magnetic flux of the induction coil 100 and inducing a pulse signal. In other embodiments, refer to Figure 4 As shown, the two poles of the permanent magnet 300 can be arranged to be distributed up and down, and the permanent magnet 300 passes through the induction coil 100. The moving component 500 is two springs, which are respectively connected to the upper and lower ends of the permanent magnet 300. When vibrated, the permanent magnet 300 moves up and down in the induction coil 100, thereby continuously changing the magnetic flux of the induction coil 100 and inducing a continuous current signal.

[0061] In some embodiments, the above-mentioned rectifier module includes a first bridge arm and a second bridge arm connected in parallel, the first bridge arm includes a first diode D1 and a second diode D2 connected in series, the second bridge arm includes a third diode D3 and a fourth diode D4 connected in series, the first diode D1, the second diode D2, the third diode D3 and the fourth diode D4 have the same direction, one end of the pulse power supply S1 (or signal generating module) is connected to the input point of the first bridge arm, and the other end of the pulse power supply S1 (or signal generating module) is connected to the input point of the second bridge arm.

[0062] The first bridge arm and the second bridge arm are connected in parallel to rectify the pulse signal. The two output ends of the pulse power supply S1 are connected to the input points of the first bridge arm and the second bridge arm respectively. The input point of the first bridge arm is between the first diode D1 and the second diode D2, and the input point of the second bridge arm is between the third diode D3 and the fourth diode D4. The directions of the four diodes are the same. Figure 1 As shown in the diode direction, no matter what direction the pulse signal of the pulse power supply S1 is, the current output in the rectifier module is output from the cathode of the first diode D1 or the cathode of the third diode D3, and added to one end of the reset coil, and the other end of the reset coil is equivalent to the cathode connected to the anode of the second diode D2 and the anode of the fourth diode D4. Through the rectifier module, it can be ensured that when the reset coil is triggered by the pulse signal, the magnetic field direction of the reset coil can reset the magnetic latching relay K1, that is, return to the disconnected state.

[0063] In some embodiments, the adjustment circuit further includes a target switch B1, and a tap of the reset coil is connected to the switch tube Qz1 through the target switch B1, and the target switch B1 is arranged outside the device for operation. The target switch B1 is arranged between the reset coil and the switch tube Qz1, and is used as an externally operated switch for the user to operate. As before, the switch tube Qz1 is internally controlled to adjust whether the current is connected to the reset switch. The switch tube Qz1 is controlled by the controller of the device, and the user has no way to directly control how the switch tube Qz1 operates. Therefore, in this embodiment, a target switch B1 is provided. In the circuit, the target switch B1 is closer to the reset coil than the switch tube Qz1. The user can disconnect the target switch B1 to cut off the connection between the adjustment circuit and the reset coil. When the equipment is installed, the user or engineer can manually disconnect the target switch B1 to avoid the reset circuit from being triggered by mistake to reset the magnetic latching relay K1. The target switch B1 can have various forms, such as a single-pole single-throw switch, a push switch, and a touch switch, etc., which are not limited here.

[0064] The present application also provides a control method for an air conditioning system, which is applied to an air conditioning system having a magnetic latching relay K1 and the aforementioned reset circuit. The reset coil of the magnetic latching relay K1 is connected to the reset circuit through a switch tube Qz1. The specific connection method can refer to the embodiments of the above-mentioned reset circuits. Figure 5 As shown, the control method of this embodiment includes but is not limited to the following steps:

[0065] Step S100, receiving an operation instruction and determining a power supply circuit that needs to be activated by the operation instruction;

[0066] Step S200: When there is a magnetic latching relay K1 connected to the reset circuit in the power supply circuit, the switch tube Qz1 is controlled to disconnect the reset circuit from the magnetic latching relay K1.

[0067] When the air conditioning system is started, it is determined whether the power supply circuit where the magnetic latching relay K1 is located needs to be enabled according to the startup function. If the power supply circuit that needs to be enabled does not involve the magnetic latching relay K1, the disconnection action in step S200 may not be performed. For example, if the air conditioning system only performs the air supply function and does not drive the refrigerant, the air conditioning system only needs to start the fan with weak current to supply air, and there will be no large current. Therefore, the circuit where the magnetic latching relay K1 is located is generally not involved. The essence of the magnetic latching relay K1 is obviously to control the on and off of a large current by a small current. For example, if the air conditioning system starts the compressor (for example, the cooling mode is started), the power supply circuit where the magnetic latching relay K1 is located may be involved. At this time, the connection between the reset circuit and the magnetic latching relay K1 is disconnected to avoid the reset circuit from being triggered by mistake and resetting the magnetic latching relay K1.

[0068] like Figure 6 As shown, in some embodiments, the control method further includes:

[0069] Step S300: When a shutdown command is received, the switch tube Qz1 is controlled to reconnect the reset circuit and the magnetic latching relay K1.

[0070] When the air-conditioning system is shut down, the magnetic latching relay K1 is controlled to be disconnected, and the reset circuit and the magnetic latching relay K1 can be reconnected. This situation can be applied to the situation that due to changes in the external environment after shutdown, such as disassembly and transportation of the air-conditioning system, the magnetic latching relay K1 may become closed due to vibration. Therefore, the reset circuit and the magnetic latching relay K1 are reconnected, that is, the reset circuit is enabled to ensure that the magnetic latching relay K1 will not be in a closed state when the air-conditioning system is started next time.

[0071] In addition, an embodiment of the present application also provides a controller, including a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor implements the above control method when executing the computer program.

[0072] An embodiment of the present application also provides an air conditioning system, including the aforementioned reset circuit, or including the aforementioned controller.

[0073] Reference Figure 1A part of the circuit in the air conditioning system shown in the figure includes the reset circuit mentioned above. When the input voltage +12V of the circuit is powered off, other parts of the circuit (such as the controller, etc.) will not have electricity to work. At this time, due to the presence of the diode D5 in the circuit, it is ensured that the electric energy stored in the capacitor E10 is only provided to the devices in this circuit. Because the input voltage +12V is powered off, the voltage output to the chip IC9 by the voltage-dividing resistor network R1 and R2 is lower than the reference voltage (generally 2.5V) inside the chip IC9. At this time, the 2nd and 3rd pins of the chip IC9 will be turned off, and the 12V voltage of the capacitor E10 is loaded onto the switch tube Q1 through the resistor R3, and the switch tube Q1 is turned on. The 12V voltage of the capacitor E10 is loaded onto the switch tube Q2 through the switch tube Q1 and the resistor R5, and the switch tube Q2 is electrically turned on. The 12V voltage of the capacitor E10 will be loaded onto the reset coil of the magnetic latching relay K1, thereby realizing the function of resetting the magnetic latching relay K1 when the power is off. The role of diode D7 in the figure is to provide a freewheeling circuit for the reset coil of the magnetic latching relay to prevent the current of the reset coil from impacting the switch tube Q2 after the switch tube Q2 is suddenly turned off. The role of diode D8 in the figure is to provide a freewheeling circuit for the closing coil of the magnetic latching relay to prevent the current of the closing coil from impacting the switch tube Q3 after the switch tube Q3 is suddenly turned off.

[0074] Figure 1 In the circuit, if the input voltage +12V is powered and the controller needs to control the magnetic latching relay K1 to reset, the controller can control the switch tube Q2 to turn on through the MCU_control_off port, diode D6, and resistor R5, thereby resetting the magnetic latching relay K1.

[0075] Figure 1 In the circuit, if the input voltage +12V is powered and the controller needs to control the magnetic latching relay K1 to close, the controller can control the switch tube Q3 to open through the MCU_control_on port and the resistor R6, thereby realizing the closing of the magnetic latching relay K1.

[0076] The device embodiments described above are merely illustrative, and the units described as separate components may or may not be physically separated, that is, they may be located in one place or distributed on multiple network nodes. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0077] It will be appreciated by those skilled in the art that all or some of the steps and systems in the disclosed method above may be implemented as software, firmware, hardware and appropriate combinations thereof. Some physical components or all physical components may be implemented as software executed by a processor, such as a central processing unit, a digital signal processor or a microprocessor, or may be implemented as hardware, or may be implemented as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on a computer-readable medium, which may include a computer-readable storage medium (or a non-transitory medium) and a communication medium (or a temporary medium). As known to those skilled in the art, the term computer-readable storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules or other data). Computer-readable storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tapes, disk storage or other magnetic storage devices, or any other medium that may be used to store desired information and may be accessed by a computer. Furthermore, it is well known to those skilled in the art that communication media typically embodies computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.

[0078] The above is a specific description of the preferred implementation of the present application, but the present application is not limited to the above-mentioned implementation mode. Technical personnel familiar with the field can also make various equivalent deformations or substitutions without violating the spirit of the present application. These equivalent deformations or substitutions are all included in the scope defined by the claims of the present application.

Claims

1. A reset circuit for a magnetic latching relay, characterized in that: include: A signal generating module, used for generating a control signal when subjected to vibration; An adjustment circuit, wherein the input end of the adjustment circuit is connected to the signal generating module, and the output end of the adjustment circuit is connected to the coil of the magnetic latching relay. The adjustment circuit is used to adjust the received control signal into a reset signal, and apply the reset signal to the coil of the magnetic latching relay to reset the magnetic latching relay.

2. The reset circuit according to claim 1, characterized in that: The signal generating module is a pulse power supply, and the pulse power supply is used to generate a pulse signal when it is vibrated, and the reset signal is a trigger signal corresponding to the pulse signal.

3. The reset circuit according to claim 2, characterized in that: The pulse power supply includes an induction coil and a vibration induction mechanism, wherein the vibration induction mechanism is used to generate a magnetic field and change the distribution of the magnetic field when vibrated, so as to induce the pulse signal in the induction coil, and the induction coil is connected to the input end of the adjustment circuit.

4. The reset circuit according to claim 3, characterized in that: The vibration sensing mechanism comprises a permanent magnet and a moving component. When the moving component is vibrated, it drives the permanent magnet to move so as to change the distribution of the magnetic field.

5. The reset circuit according to claim 3, characterized in that: The vibration sensing mechanism includes a permanent magnet, a rotating shaft and an armature. The magnetic poles of the permanent magnet are distributed in the up and down directions. The armature passes through the induction coil. The two ends of the armature are respectively arranged on the left and right sides of the permanent magnet. When the permanent magnet is vibrated, it rotates around the rotating shaft between the two ends of the armature.

6. The reset circuit according to claim 5, characterized in that: The permanent magnet includes a first end and a second end extending from the S pole, and also includes a third end and a fourth end extending from the N pole, a groove-like structure is formed between the first end and the third end to accommodate one end of the armature, and a groove-like structure is formed between the second end and the fourth end to accommodate the other end of the armature.

7. The reset circuit according to claim 6, characterized in that: The groove width of the groove-shaped structure is greater than the width of the end of the armature, and a gap is left between the groove bottom of the groove-shaped structure and the end of the armature.

8. The reset circuit according to claim 1, characterized in that: The magnetic holding relay includes a reset coil, and the adjustment circuit includes a rectifier module and a switch tube. One end of the rectifier module is connected to a tap of the reset coil through the switch tube, and the other end of the rectifier module is connected to another tap of the reset coil.

9. The reset circuit according to claim 8, characterized in that: The rectifier module includes a first bridge arm and a second bridge arm connected in parallel, the first bridge arm includes a first diode and a second diode connected in series, the second bridge arm includes a third diode and a fourth diode connected in series, the first diode, the second diode, the third diode and the fourth diode have the same direction, one end of the signal generating module is connected to the input point of the first bridge arm, and the other end of the signal generating module is connected to the input point of the second bridge arm.

10. The reset circuit according to claim 8, characterized in that: The adjustment circuit also includes a target switch, a tap of the reset coil is connected to the switch tube through the target switch, and the target switch is arranged outside the device for operation, and the device is a device including the reset circuit.

11. A method for controlling an air conditioning system, characterized in that: The air conditioning system comprises a magnetic latching relay and a reset circuit according to any one of claims 1 to 10, wherein the coil of the magnetic latching relay is connected to the reset circuit via a switch tube; and the control method comprises: Receiving an operation instruction, and determining a power supply circuit that needs to be activated by the operation instruction; When the magnetic latching relay connected to the reset circuit exists in the power supply circuit, the switch tube is controlled to disconnect the reset circuit from the magnetic latching relay.

12. The control method according to claim 11, characterized in that: The control method further comprises: When a shutdown command is received, the switch tube is controlled to reconnect the reset circuit and the magnetic latching relay.

13. A controller, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the control method according to claim 11 or 12 when executing the computer program.

14. An air conditioning system, characterized in that: A reset circuit comprising any one of claims 1 to 10 or a controller comprising claim 13.

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