Electric heating open-circuit protection control method, air conditioner and computer-readable storage medium

Abstract

Disclosed in the present application are an electric heating open-circuit protection control method, an air conditioner and a computer-readable storage medium. The electric heating open-circuit protection control method is applied to an air conditioner, wherein the air conditioner at least comprises a water tank, and the water tank at least comprises a controller and an electric heating device which are connected to each other. The electric heating open-circuit protection control method comprises: when an electric heating control instruction has been received, and a power supply circuit of an electric heating device is in an open-circuit state, locking a controller in an off state, and starting timing a protection duration; determining whether the currently accumulated number of protection releases is greater than or equal to a preset number of times; if the currently accumulated number of protection releases is not greater than or equal to the preset number of times, unlocking the controller when the protection duration reaches a preset duration, and updating the number of protection releases; and if the currently accumulated number of protection releases is greater than or equal to the preset number of times, keeping the controller locked in the off state.

Description

Electric heating circuit breaking protection control method, air conditioner and computer readable storage medium

[0001] Related applications

[0002] The present application claims priority to Chinese Patent Application No. 202411337063.6, filed on September 24, 2024, the contents of which are incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] The present application relates to the technical field of air conditioners, and in particular to an electric heating circuit breaking protection control method, an air conditioner and a computer readable storage medium. BACKGROUND

[0004] An electric heating device is arranged in a water tank of a heat pump water heater of an air conditioner system, and is used to heat water (for example, water) in the water tank. The electric heating device uses a different power supply from that used by an outdoor unit of the air conditioner. In actual application scenarios, the power supply circuit of the electric heating device may be broken, and in this case, electric heating circuit breaking protection occurs, causing the controller of the electric heating device to be locked in a closed state. After the power supply circuit of the electric heating device is restored to normal, the entire air conditioner system needs to be manually powered off to release the electric heating circuit breaking protection state, and this will affect the use of other indoor units connected to the outdoor unit of the air conditioner. Therefore, the current electric heating circuit breaking protection scheme of the air conditioner affects the overall operation stability of the air conditioner. SUMMARY

[0005] The main purpose of the present application is to provide an electric heating circuit breaking protection control method, an air conditioner and a computer readable storage medium, which aims to solve the technical problem that the current electric heating circuit breaking protection scheme of the air conditioner affects the overall operation stability of the air conditioner.

[0006] To achieve the above-mentioned purpose, the present application provides an electric heating circuit breaking protection control method applied to an air conditioner, the air conditioner at least comprising a water tank, the water tank at least comprising a controller and an electric heating device connected to each other, and the electric heating circuit breaking protection control method comprising:

[0007] When receiving an electric heating control instruction and the power supply circuit of the electric heating device is in a broken state, locking the controller in a closed state and starting to count a protection duration;

[0008] determining whether the current cumulative number of times of releasing protection is greater than or equal to a preset number of times;

[0009] If not, releasing the lock on the controller when the protection duration reaches a preset duration, and updating the number of times of releasing protection;

[0010] If yes, continuously locking the controller in a closed state.

[0011] In an embodiment, the electric heating circuit protection control method further comprises:

[0012] If the power supply circuit is in the on state when the electric heating control instruction is received, resetting the protection release count and the protection duration;

[0013] When the manual protection release instruction is received, unlocking the controller and resetting the protection release count and the protection duration.

[0014] In an embodiment, the air conditioner further comprises an outdoor unit, which is in heat exchange connection with the water in the water tank. After the step of locking the controller in the off state, the method further comprises:

[0015] When the air conditioner is in the vacation mode, continuously locking the controller in the off state;

[0016] When the air conditioner is in the non-vacation mode and the temperature of the water in the water tank is lower than the target temperature and the maximum heating temperature of the outdoor unit, controlling the outdoor unit to heat the water;

[0017] After the outdoor unit stops heating, if the temperature of the water is lower than the target temperature, and the protection release count is lower than the preset count, unlocking the controller and starting the controller.

[0018] In an embodiment, after the step of starting the controller, the method further comprises:

[0019] If the power supply circuit is in the on state, resetting the protection release count;

[0020] If the power supply circuit is in the off state, updating the protection release count and locking the controller in the off state.

[0021] In an embodiment, the electric heating circuit protection control method further comprises:

[0022] When the air conditioner is in the non-vacation mode and the temperature of the water in the water tank is lower than the target temperature and higher than the maximum heating temperature of the outdoor unit, unlocking the controller and starting the controller if the protection release count is lower than the preset count.

[0023] In an embodiment, the air conditioner further comprises an air conditioner indoor unit, and the electric heating circuit protection control method further comprises:

[0024] If the temperature of the water in the water tank is lower than the target temperature when the air conditioner is in the non-vacation mode, determining whether the air conditioner indoor unit is in the heating state;

[0025] When the air conditioner indoor unit is in the heating state, heating the water by the outdoor unit, and unlocking the controller and starting the controller if the protection duration is greater than or equal to the preset duration and the protection release count is less than the preset count.

[0026] In an embodiment, after the step of controlling the outdoor unit to heat the water, the method further comprises:

[0027] When the temperature of the water is greater than or equal to the target temperature or the maximum heating temperature of the outdoor unit, controlling the outdoor unit to stop heating.

[0028] In an embodiment, the electric heating trip protection control method further comprises:

[0029] When the air conditioner is in the non-vacation mode, the temperature of the water in the water tank is lower than the difference between the target temperature and the temperature hysteresis, and the temperature of the water is lower than the difference between the maximum heating temperature of the outdoor unit and the temperature hysteresis, controlling the outdoor unit to heat the water.

[0030] In addition, to achieve the above object, the present application also provides an air conditioner, which is a physical device. The air conditioner comprises at least one processor and a memory in communication connection with the at least one processor. The memory stores instructions executable by the at least one processor. The instructions are executed by the at least one processor to enable the at least one processor to perform the steps of the above electric heating trip protection control method.

[0031] In addition, to achieve the above object, the present application also provides a readable storage medium, which is a computer readable storage medium. The computer readable storage medium stores a program for implementing the electric heating trip protection control method. The program for implementing the electric heating trip protection control method is executed by a processor to implement the steps of the above electric heating trip protection control method.

[0032] In addition, to achieve the above object, the present application also provides a computer program product comprising a computer program. The computer program is executed by a processor to implement the steps of the above electric heating trip protection control method.

[0033] The application provides an electric heating circuit breaking protection control method applied to an air conditioner, the air conditioner at least comprising a water tank, the water tank at least comprising a controller and an electric heating device connected with each other, the electric heating circuit breaking protection control method comprising: when receiving an electric heating control instruction and the power supply circuit of the electric heating device is in a breaking state, locking the controller into an off state and starting to count a protection duration; judging whether the current cumulative number of protection release times is greater than or equal to a preset number; if not, releasing the locking of the controller when the protection duration reaches a preset duration and updating the number of protection release times; and if yes, continuously locking the controller into the off state. In the technical scheme of the application, after the controller is locked into the off state, i.e. the circuit breaking protection is triggered, the locking of the electric heating controller relay is automatically released after the preset duration, the effect of automatically releasing the circuit breaking protection is achieved, the user does not need to manually release the protection or power-off protection, the running of other air conditioner indoor units is not affected when the circuit breaking protection is released, the overall running stability of the air conditioner is maintained, and the user experience is improved. In addition, in the application, the preset number corresponding to the preset number of protection release times and the preset duration corresponding to the protection duration are used to control the total number and frequency of releasing the circuit breaking protection, so that the controller is not frequently turned on and off in the case that the power supply circuit is in a breaking state for a long time, and the service life of the controller is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0034] The accompanying drawings, which are incorporated herein and form part of the specification, illustrate embodiments consistent with the present application and, together with the description, further serve to explain the principles of the application.

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the application or the related art, the accompanying drawings needed to be used in the embodiments or the related art description will be briefly introduced. Obviously, those skilled in the art can obtain other drawings according to these drawings without any creative effort.

[0036] Fig. 1 is a flowchart of an embodiment of the electric heating circuit breaking protection control method in the application;

[0037] Fig. 2 is a schematic diagram of the structure of a multi-group pipe air conditioner system;

[0038] Fig. 3 is a flowchart of automatically releasing the circuit breaking protection based on the number of protection release times and the preset duration when the electric heating circuit breaking protection occurs in the embodiment of the application;

[0039] Fig. 4 is a flowchart of manually releasing the electric heating circuit breaking protection in the embodiment of the application;

[0040] Fig. 5 is a flowchart of automatically releasing the circuit breaking protection according to the current water temperature and the set temperature when the air conditioner is in a non-holiday mode in the embodiment of the application;

[0041] Fig. 6 is a flowchart of the automatic release of the circuit protection in different heating priority conditions of the air conditioner according to an embodiment of the present application;

[0042] Fig. 7 is a device structure diagram of the hardware running environment involved in the electric heating circuit protection control method according to an embodiment of the present application.

[0043] The object, functional characteristics and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. Embodiment of the present application

[0044] In a multi-group pipe air conditioner system, usually one air conditioner outdoor unit is matched with one water tank and several air conditioner indoor units. Due to the current size limitation, the electric heating input power of the water tank cannot use the same power supply as the air conditioner outdoor unit, and needs to be connected to other power supply. However, in the use process, there may be a situation that only the air conditioner outdoor unit power supply is connected, but the water tank electric heating power supply is not connected, which causes the electric heating to be unable to supply power and triggers the electric heating circuit protection. If the electric heating power supply is restored at this time, if the circuit protection is released by power-off, it will affect the use of other air conditioner indoor units, and the efficiency of the manual release of the circuit protection control method is low. Therefore, the multi-group pipe air conditioner needs to realize an automatic release of the circuit protection control method.

[0045] In order to overcome the technical problems and defects existing in the related art, the present application provides an electric heating circuit protection control method applied to an air conditioner. The air conditioner at least includes a water tank, and the water tank at least includes a controller and an electric heating device connected to each other. Referring to Fig. 1, Fig. 1 is a flowchart of the electric heating circuit protection control method according to an embodiment of the present application. The electric heating circuit protection control method specifically includes the following steps.

[0046] Step S10, when receiving the electric heating control instruction and the power supply circuit of the electric heating device is in the open circuit state, the controller is locked in the closed state, and the protection time length is started.

[0047] In the embodiments of the present application, the air conditioner is a multi-group pipe air conditioner or a heat pump water heater. In the multi-group pipe air conditioner system, referring to FIG. 2, one outdoor unit (including a compressor and a fan) can be connected to more than one indoor unit (for example, air conditioner indoor units 1-3 and a water tank), and can simultaneously provide air conditioning refrigeration / heat and water tank heat. The connection between the outdoor unit and the indoor unit is realized through a current loop (power supply + communication), and the power input is on the outdoor unit side. Depending on the capacity of the outdoor unit, the current is generally 16A-20A. The water tank capacity is different, and the electric heating power inside the water tank can be different, ranging from 1kW to 3kW, so the current is 4A-15A. Due to current limitations, the power supply of the entire system cannot be completed through the same set of power lines (power input 1 and power input 2). Therefore, the power supply of the water tank electric heating and the power supply on the outdoor unit side are separate. The power supply can come from the same set of alternating current or different sets, but different air switches (air switches) will be used, so there can be a situation where the outdoor unit side and the water tank electric heating side do not have power at the same time. For example, if the outdoor unit side has power supply, and the target water temperature set by the user can be basically provided and met by the outdoor unit, then the electric heating device does not need to heat the water in the water tank, so sometimes the electric heating side is not powered. When electric heating is needed, the electric heating side is forgotten to be powered again, resulting in a situation where the two sides do not supply power at the same time (the power supply circuit of the electric heating side is in an open circuit state).

[0048] The heat pump water heater tank (split type or integral type) is designed with an electric heating device. When the electric heating function needs to be turned on, the current change before and after the electric heating device is started is detected and compared to determine whether the power supply circuit of the electric heating device has an open circuit, for example, the current change <2A (the electric heating power is generally above 1000w, I=P / U=1000 / 220=4.5A), it is considered that the power supply circuit of the electric heating device is open, and the open circuit protection is triggered. After the open circuit protection is triggered, the electric heating device cannot be started again (the controller is locked in the off state), at this time, the electric heating device can only be started again by power off or by manually removing the protection on the control panel. The controller is used to control the on-off state of the electric heating device, for example, a relay. Specifically, the process of the electric heating device triggering the open circuit protection can include: detecting the current before the water tank electric heating device is turned on (the controller is off), and recording it as Ie1; detecting the current after receiving the electric heating control instruction and starting the water tank electric heating (the controller is on), and recording it as Ie2; if Ie2Ie1 or (Ie2-Ie1)<2A, where 2A is a pre-set current fluctuation threshold, it is considered that the electric heating open circuit protection (the electric heating body failure, abnormal wiring, power supply failure can all cause it) occurs. After the electric heating open circuit protection occurs, the relay is no longer allowed to be turned on, and the protection time is counted from zero to trigger automatic removal of the open circuit protection after reaching the pre-set time.

[0049] Step S20, judging whether the current accumulated number of times of releasing protection is greater than or equal to a preset number of times;

[0050] Before the automatic release of the circuit protection, it is necessary to judge whether the current accumulated number of times of releasing protection is greater than or equal to a preset number of times. It can be understood that the number of times of releasing protection is accumulated once every time the automatic protection is triggered, which is to prevent the controller from frequently starting and closing when the power supply circuit is in the circuit state for a long time, thereby affecting the service life of the controller.

[0051] Step S30, if not, releasing the lock of the controller when the protection duration reaches a preset duration, and updating the number of times of releasing protection.

[0052] When the current accumulated number of times of releasing protection does not reach the preset number of times, the timing of releasing the lock of the controller can be determined according to the current protection duration, that is, the lock of the controller is automatically released (i.e., the circuit protection is released) when the protection duration reaches a preset duration (for example, 6 hours), and the accumulated number of times of releasing protection is accumulated by 1. It should be noted that after the lock of the controller is released, it does not mean that the relay is automatically turned on, but only means that the controller is in an openable state. After the circuit protection is released, whether the air conditioner can be successfully turned on or not depends on whether the power supply circuit is in the on-state.

[0053] Step S40, if yes, the controller is continuously locked in the off state.

[0054] When the current accumulated number of times of releasing protection is greater than or equal to a preset number of times (for example, 20 times), the step of automatically releasing the circuit protection is not performed, and the lock state of the controller remains unchanged. Until the user manually releases the circuit protection or the air conditioner is powered off as a whole, the controller is released from the circuit protection state.

[0055] The embodiment of the application provides an electric heating circuit protection control method applied to an air conditioner, the air conditioner at least comprising a water tank, the water tank at least comprising a controller and an electric heating device connected with each other, the electric heating circuit protection control method comprising: when receiving an electric heating control instruction and a power supply circuit of the electric heating device is in an open circuit state, locking the controller into an off state, starting to count a protection duration; judging whether a current cumulative number of times of release of protection is greater than or equal to a preset number of times; if not, unlocking the controller when the protection duration reaches a preset duration, and updating the number of times of release of protection; and if yes, continuously locking the controller into the off state. In the technical scheme of the embodiment of the application, after the controller is locked into the off state, i.e. after the open circuit protection is triggered, the locking of the electric heating controller relay is automatically released after the preset duration, the effect of automatically releasing the open circuit protection is achieved, the user does not need to manually release the protection or power-off protection, the running of other air conditioner indoor units is not affected when the open circuit protection is released, the overall running stability of the air conditioner is maintained, and the user experience is improved. In addition, in the embodiment of the application, the preset number of times corresponding to the preset number of times of release of protection and the preset duration corresponding to the protection duration are set, so that the total number of times and the frequency of release of the open circuit protection are controlled, the controller is prevented from being frequently turned on and off in the case that the power supply circuit is in the open circuit state for a long time, and the service life of the controller is prolonged.

[0056] In an embodiment, the electric heating circuit protection control method further comprises:

[0057] If the power supply circuit is in a pass-through state when the electric heating control instruction is received, the number of times of release of protection and the protection duration are reset;

[0058] If the power supply circuit is in a pass-through state when the air conditioner receives the electric heating control instruction, the open circuit protection operation does not need to be triggered, at this time, the number of times of release of protection and the protection duration that have been accumulated by the air conditioner can be reset (zeroed), and the number of times of release of protection and the protection duration are re-counted after the open circuit protection is triggered next time. This is because the number of times of release of protection and the protection duration are used to prevent the controller from being frequently started in the long-term open circuit state, and the number of times of release of protection and the protection duration are re-counted after the controller is in the pass-through state.

[0059] With the foregoing embodiments, the process of opening the electric heating function and automatically releasing the circuit protection based on the number of releases and the specified time when the electric heating circuit protection occurs is shown in FIG. 3. First, when receiving the electric heating control instruction to open the electric heating function, it is determined whether the electric heating circuit protection is triggered (based on the on-off state of the power supply circuit). If not, the protection release number and the protection time are reset. If yes, the electric heating control function is closed (specifically by locking the controller in the closed state). Further, when the cumulative number of protection releases exceeds the preset number, the state of closing the electric heating control function is maintained. If not, the protection time is started, and after the protection time exceeds the preset time, the circuit protection is released, and the protection release number is increased by 1, so as to open the electric heating function when receiving the electric heating control instruction next time.

[0060] In an embodiment, the electric heating circuit protection control method further comprises: when receiving a manual release protection instruction, releasing the lock of the controller and resetting the protection release number and the protection time.

[0061] When the controller is in the power-off protection state (locked in the closed state and unable to start), the user can input a manual release protection instruction on the control panel of the air conditioner. The manual release protection instruction can be input before the protection release number reaches the preset number, or can be input after the protection release number reaches the preset number. Regardless of the situation, the air conditioner resets the protection release number and the protection time after receiving the manual release protection instruction, and then re-accumulates the protection release number and the protection time when the circuit protection is triggered next time.

[0062] Exemplarily, the process of manually releasing the electric heating circuit protection is shown in FIG. 4. After the electric heating circuit protection occurs, the user manually releases the circuit protection on the control panel, and resets the protection release number and the protection time.

[0063] If the power supply circuit of the electric heating device is always in the circuit-off state, the foregoing manual control method can control the protection release number not to be too much, thereby prolonging the service life of the controller. If the power supply circuit of the electric heating device is restored, the controller of the electric heating device normally uses electricity to heat the water in the water tank when the electric heating device is needed to heat water next time.

[0064] In an embodiment, the air conditioner further comprises an outdoor unit, which is in heat exchange connection with the water in the water tank. After the step of locking the controller in the closed state, the method further comprises:

[0065] When the air conditioner is in the vacation mode, the controller is continuously locked in the closed state.

[0066] The air conditioner has an outdoor unit, and the heat pump function of the outdoor unit can heat an internal environment by heat of an external environment, such as heating air of the internal environment by an indoor unit of the air conditioner and heating water in a water tank by the outdoor unit.

[0067] If the power supply circuit of the electric heating device is always in an open circuit state, even if the open circuit protection is attempted to be released, the open circuit protection will still occur when the electric heating is turned on next time. In order to prevent the frequent release of the open circuit protection from affecting the service life of the controller, whether the air conditioner is in a vacation mode is considered in the embodiment of the application to determine whether to start the function of automatically releasing the open circuit protection.

[0068] When the open circuit protection of the air conditioner occurs, it is first determined whether the air conditioner is currently in a vacation mode, wherein the vacation mode refers to a state of the air conditioner when a user is away from a use place of the air conditioner for a long time. For example, when the user goes out for a trip, the air conditioner at home is set to the vacation mode and enters a low energy consumption state. If the air conditioner is operated in the vacation mode, the target water temperature of the water tank is very low (the water temperature ensuring that the water tank is not frozen, which is generally 15℃), and the user is not at home at this time, the power supply circuit of the electric heating device is in an open circuit state and cannot be restored, and at this time, the release protection operation is not required in the vacation mode. There are two ways to determine whether the air conditioner is in the vacation mode, one is according to the setting of the user, for example, the user sets the air conditioner to the vacation mode before going out, and the air conditioner has a record, so it can be determined that the air conditioner is in the vacation mode; the other is according to the target water temperature of the water tank, if the target water temperature is not higher than a preset temperature threshold (for example, 15℃), it can be determined that the air conditioner is in the vacation mode.

[0069] After the open circuit protection is triggered in the vacation mode, it is not required to determine the number of times of release of the protection, and it is not required to time the protection duration, and the open circuit protection state is maintained.

[0070] In an embodiment, the method further includes: when the air conditioner is in a non-vacation mode, and the temperature of the water in the water tank is lower than the target temperature and the maximum heating temperature of the outdoor unit, controlling the outdoor unit to heat the water.

[0071] In an embodiment, the method further includes: after the outdoor unit stops heating, if the temperature of the water is lower than the target temperature, releasing the lock of the controller and starting the controller in a case where the number of times of release of the protection is lower than a preset number of times.

[0072] In another aspect, in the non-vacation mode, if the water temperature in the water tank drops below the target temperature and below the maximum heating temperature of the outdoor unit, the outdoor unit can be used to heat the water in the water tank first. The maximum heating temperature of the outdoor unit depends on the external environment temperature, and the higher the external environment temperature, the higher the maximum heating temperature of the outdoor unit. The outdoor unit will heat the water in the water tank for a period of time, and when the outdoor unit cannot continue to heat (for example, the current water temperature reaches the maximum heating temperature but does not reach the target temperature), the water in the water tank needs to be heated by the electric heating device. Since the controller is in a circuit protection state at this time, it is necessary to determine whether the cumulative number of protection releases is lower than the preset number, and if so, the circuit protection can be automatically released (i.e., the lock on the controller is released). And after releasing the circuit protection, the controller is automatically started to heat the water in the water tank by the electric heating device.

[0073] After the automatic release of the circuit protection, the number of protection releases is added by 1.

[0074] As shown in FIG. 5, after the electric heating function is turned on, it is determined whether the electric heating circuit protection is triggered, and if so, the number of protection releases is reset; if not, the electric heating control function is turned off, it is determined whether the air conditioner is in the non-vacation mode and the outdoor unit is running and stopped, and the current refrigerant temperature does not reach the target temperature; if so, the circuit protection is released when the cumulative number of protection releases does not exceed the preset number, and the number of protection releases is added by 1; if not or the cumulative number of protection releases exceeds the preset number, the circuit protection state is maintained.

[0075] In an embodiment, after the step of controlling the outdoor unit to heat the water, the method further comprises:

[0076] When the temperature of the water is greater than or equal to the target temperature or the maximum heating temperature of the outdoor unit, the outdoor unit is controlled to stop heating.

[0077] The embodiments of the present application provide a control method for heating water by an outdoor unit. The outdoor unit and the electric heating device cooperate to heat the water in the water tank.

[0078] Specifically, when the temperature of the water is greater than or equal to the target temperature after the heating by the outdoor unit, it indicates that the target temperature is less than or equal to the maximum heating temperature of the outdoor unit, and thus the outdoor unit does not need to continue heating and can be controlled to stop heating. In addition, after the temperature of the water reaches the target temperature, the step of "after the outdoor unit stops heating, if the temperature of the water is lower than the target temperature, and the number of times of releasing protection is less than the preset number of times, releasing the lock of the controller and starting the controller" does not need to be performed, and the circuit protection of the electric heating device does not need to be released. When the temperature of the water reaches the maximum heating temperature of the outdoor unit, the outdoor unit cannot continue to increase the temperature of the water, and thus the outdoor unit is controlled to stop heating, and the step of "after the outdoor unit stops heating, if the temperature of the water is lower than the target temperature, and the number of times of releasing protection is less than the preset number of times, releasing the lock of the controller and starting the controller" is performed to release the circuit protection of the electric heating device and start the electric heating device to heat the water.

[0079] After the step of starting the controller, the method further comprises:

[0080] If the power supply circuit is in the on state, resetting the number of times of releasing protection;

[0081] If the power supply circuit is in the off state, updating the number of times of releasing protection and locking the controller in the off state.

[0082] After the heating by the outdoor unit is completed, if the temperature of the water does not reach the target temperature, the electric heating device needs to continue to further heat the water in the water tank, and thus the lock of the controller needs to be immediately released (i.e., the circuit protection is released). There are two cases. One is that the power supply circuit has returned to the on state, the electric heating device is normally powered, and the electric heating device can normally work, and thus the number of times of releasing protection is reset (set to 0). The other case is that the power supply circuit is still in the off state, and thus the number of times of releasing protection is added by 1 according to the foregoing scheme, and the circuit protection is retriggered to lock the controller in the off state.

[0083] After the electric heating device is normally powered, the water in the water tank is continuously heated to the target temperature. When the power supply circuit of the electric heating device is in the off state, the water in the water tank stops being continuously heated and is in a natural heat dissipation state until the temperature of the water decreases to a level that can be heated by the outdoor unit, the outdoor unit is used to heat the water, the step of "after the outdoor unit stops heating, if the temperature of the water is lower than the target temperature, and the number of times of releasing protection is less than the preset number of times, releasing the lock of the controller and starting the controller" is performed to release the circuit protection for the next time, and then the step of "if the power supply circuit is in the on state, resetting the number of times of releasing protection" or the step of "if the power supply circuit is in the off state, updating the number of times of releasing protection and locking the controller in the off state" is performed according to the on-off state of the power supply circuit.

[0084] In another embodiment, the electric heating circuit protection control method further comprises:

[0085] When the air conditioner is in the non-vacation mode, and the temperature of the water in the water tank is lower than the target temperature and higher than the maximum heating temperature of the outdoor unit, the lock on the controller is released and the controller is started if the number of times of releasing protection is lower than the preset number.

[0086] In some cases, the outdoor unit cannot directly heat the water in the water tank, for example, when the temperature of the external environment is low, the heating effect of the outdoor unit is poor, and the corresponding maximum heating temperature is low. When the air conditioner is in the non-vacation mode, and the temperature of the water in the water tank is higher than the maximum heating temperature of the outdoor unit, the outdoor unit cannot heat the water in the water tank. At this time, the electric heating device needs to be directly started for heating, and the step of releasing the circuit protection is performed, and then the controller is started to heat the water in the water tank by the electric heating device.

[0087] In another embodiment, the air conditioner further comprises an air conditioner indoor unit, and the electric heating circuit protection control method further comprises:

[0088] If the temperature of the water in the water tank is lower than the target temperature when the air conditioner is in the non-vacation mode, it is determined whether the air conditioner indoor unit is in a heating state.

[0089] When the air conditioner indoor unit is in the heating state, the water is heated by the outdoor unit, and the lock on the controller is released and the controller is started if the protection duration is greater than or equal to the preset duration and the number of times of releasing protection is less than the preset number.

[0090] Further, in a multi-group pipe air conditioner system, the air conditioner indoor unit and the water tank are included. Generally, when the air conditioner indoor unit needs to be heated, the entire multi-group pipe air conditioner system will preferentially supply heat to the air conditioner indoor unit. For example, when the air conditioner indoor unit has a heating demand and the water tank also has a heating demand, the outdoor unit preferentially heats the air conditioner indoor unit, at this time, the proportion of the outdoor unit supplying heat to the water tank is low, resulting in poor heating effect of the water in the water tank by the outdoor unit, and the duration to reach the target temperature or the maximum heating temperature of the outdoor unit is greatly increased. Therefore, when the air conditioner indoor unit is also in the heating state, the electric heating device is used to heat the water tank immediately after the number of times of releasing protection is less than the preset number and the protection duration reaches the preset duration, so as to quickly raise the temperature of the water in the water tank to the target temperature. Similarly, the steps of starting the electric heating device for heating are consistent with the step of “when the outdoor unit stops heating, if the temperature of the water is lower than the target temperature, the lock on the controller is released and the controller is started if the number of times of releasing protection is lower than the preset number”, that is, the circuit protection is released first, then the controller is started, and the water tank is heated by the electric heating device when the power supply circuit of the electric heating device is normal, so as to reduce the heating duration and improve the heating efficiency.

[0091] With reference to FIG. 6, in comparison with the foregoing embodiment, when the water is water, a control method of an air conditioner combining electric heating and outdoor unit heating includes: when it is required to open the electric heating function, determining whether the electric heating circuit breaking protection is triggered, if not, resetting the protection release times and the protection duration; if yes, closing the electric heating control function; when in the non-holiday mode, if the multi-group pipe air conditioner system is in the water heating priority mode, stopping the outdoor unit after the outdoor unit runs, and when the current water temperature does not reach the target temperature, releasing the circuit breaking protection when the accumulated protection release times do not reach the preset times; when the accumulated protection release times exceed the preset times, closing the electric heating control function; when the system is not in the water heating priority mode, determining whether the condition for starting the outdoor unit (for example, the current water temperature is lower than the maximum heating temperature of the outdoor unit and the target temperature) is reached, starting the outdoor unit when the condition for starting the outdoor unit is reached, and releasing the circuit breaking protection when the current protection release duration and the protection release times are respectively not greater than the preset duration and the preset times, and adding 1 to the protection release times, so as to heat the water tank by the electric heating device.

[0092] Further, in another embodiment, the electric heating circuit breaking protection control method further includes:

[0093] When the air conditioner is in the non-holiday mode, the temperature of the water in the water tank is lower than the difference between the target temperature and the temperature hysteresis, and the temperature of the water is lower than the difference between the maximum heating temperature of the outdoor unit and the temperature hysteresis, the outdoor unit is controlled to heat the water.

[0094] In order to avoid the heating process of the outdoor unit on the water tank from being frequently started and stopped, a temperature hysteresis can be preset, that is, only when the current water temperature is lower than the difference between the maximum heating temperature of the outdoor unit and the temperature hysteresis, and lower than the difference between the target temperature and the temperature hysteresis, the outdoor unit is started to heat the water.

[0095] Specifically, after the water is heated by the outdoor unit to reach the maximum heating temperature or the target temperature, the heating is stopped, and the water temperature is waited to drop, and when the water temperature drops to the difference between the target temperature and the temperature hysteresis and the difference between the maximum heating temperature of the outdoor unit and the temperature hysteresis, the outdoor unit is restarted to heat the water. For example, when the current water temperature T5 is 45℃, the target temperature Ts set by the user is 70℃, the maximum heating temperature Tstop of the outdoor unit is 50℃, and the temperature hysteresis for starting to use the outdoor unit to heat is Td (8℃). When T5 < Min (Ts, Tstop) - Td, the outdoor unit is started to heat, that is, when the water temperature T5 drops to 42℃ or below, the outdoor unit is started to heat. When T5 ≥ Min (Ts, Tstop), the outdoor unit stops heating when the water temperature is raised to 50℃, and the water temperature still does not meet the requirement of 70℃ set by the user, the circuit breaking protection of the electric heating is released to open the electric heating function.

[0096] The electric heating circuit protection control method provided by the embodiments of the present application can automatically release the circuit protection of electric heating, reduce the operation of user power recovery or manual release, and improve user experience. In the electric heating circuit protection control method of the embodiments of the present application, after the power supply of the water tank electric heating side is restored, the circuit protection is automatically released as much as possible. By limiting the number of times of releasing protection and the protection time length in advance, the life of the controller and other devices can be protected while improving user experience.

[0097] The embodiments of the present application also provide an air conditioner, which comprises at least one processor, and a memory in communication connection with the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to execute the electric heating circuit protection control method in the above-mentioned embodiment one.

[0098] Reference is made to FIG. 7 below, which shows a structural schematic diagram of an air conditioner suitable for implementing the embodiments of the present application. The air conditioner shown in FIG. 7 is merely an example, and should not bring any limitation to the functions and use range of the embodiments of the present application.

[0099] As shown in FIG. 7, the air conditioner can comprise a processing device 1001 (for example, a central processing unit, a graphics processing unit, etc.), which can perform various appropriate actions and processes according to programs stored in a read-only memory (ROM) 1002 or loaded from a storage device 1003 to a random access memory (RAM) 1004. In the RAM 1004, various programs and data required for air conditioner operation are also stored. The processing device 1001, the ROM 1002, and the RAM 1004 are connected to each other through a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Generally, the following systems can be connected to the I / O interface 1006: an input device 1007 including, for example, a touch screen, a touchpad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, etc.; an output device 1008 including, for example, a liquid crystal display (LCD), a speaker, a vibrator, etc.; the storage device 1003 including, for example, a magnetic tape, a hard disk, etc.; and a communication device 1009. The communication device 1009 can allow the air conditioner to communicate with other devices wirelessly or by wire to exchange data. Although the air conditioner with various systems is shown in the figure, it should be understood that it is not required to implement or have all the shown systems. More or fewer systems can be alternatively implemented or had.

[0100] In particular, according to the embodiments of the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, the embodiments of the present application include a computer program product comprising a computer program carried on a computer readable medium, the computer program containing program code for executing the method shown in the flowchart. In such embodiments, the computer program can be downloaded and installed from a network through a communication device, or installed from the storage device 1003, or installed from the ROM 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the method of the embodiments of the present application are executed.

[0101] The air conditioner provided by the embodiments of the present application adopts the electric heating circuit protection control method in the above embodiments, and can solve the technical problem that the electric heating circuit protection scheme of the current air conditioner affects the overall operation stability of the air conditioner. Compared with the related art, the air conditioner provided by the embodiments of the present application has the same beneficial effects as the electric heating circuit protection control method provided by the above embodiments, and other technical features in the air conditioner are the same as the features disclosed in the above embodiments, which will not be described herein.

[0102] The embodiments of the present application further provide a computer readable storage medium having computer readable program instructions stored thereon, and the computer readable program instructions are used to execute the electric heating circuit protection control method in the above embodiment one.

[0103] The computer readable storage medium provided by the embodiments of the present application may, for example, be a U disk, but is not limited to an electric, magnetic, optical, electromagnetic, infrared, or semiconductor system, system or device, or any combination of the above. More specific examples of the computer readable storage medium can include, but are not limited to, an electric connection with one or more conductive wires, a portable computer disk, a hard disk, a random access memory (RAM), a read only memory (ROM), an erasable programmable read only memory (EPROM or flash memory), an optical fiber, a portable compact disk read only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the embodiments, the computer readable storage medium can be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, system or device. The program code contained on the computer readable storage medium can be transmitted by any appropriate medium, including but not limited to: electric wire, optical cable, RF (Radio Frequency: radio frequency), etc., or any suitable combination of the above.

[0104] The computer readable storage medium can be included in the air conditioner or exist independently without being assembled into the air conditioner.

[0105] The computer readable storage medium carries one or more programs, and when the one or more programs are executed by the air conditioner, the air conditioner is caused to perform the following: when the electric heating control instruction is received and the power supply circuit of the electric heating device is in an open circuit state, the controller is locked in a closed state, and a protection time length is started to be counted; it is judged whether the current cumulative number of times of release of protection is greater than or equal to a preset number of times; if not, the locking of the controller is released when the protection time length reaches a preset time length, and the number of times of release of protection is updated; and if yes, the controller is continuously locked in the closed state.

[0106] Computer program code for carrying out operations of the present application can be written in any combination of one or more programming languages, including an object oriented programming language such as Java, Smalltalk, C++ or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code can execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the latter scenario, the remote computer can be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or the connection can be made to an external computer (for example, through the Internet using an Internet Service Provider).

[0107] The readable storage medium provided in the present application is a computer readable storage medium, and the computer readable storage medium stores computer readable program instructions for executing the above electric heating open circuit protection control method, and can solve the technical problem that the current electric heating open circuit protection scheme of the air conditioner affects the overall operation stability of the air conditioner. Compared with the related art, the computer readable storage medium provided in the embodiments of the present application has the same beneficial effects as the electric heating open circuit protection control method provided in the above-mentioned embodiments, and details are not repeated here.

[0108] The embodiments of the present application further provide a computer program product, including a computer program, and the computer program is executed by a processor to implement the steps of the electric heating open circuit protection control method.

[0109] The computer program product provided in the application can solve the technical problem that the electric heating circuit protection scheme of the air conditioner affects the overall operation stability of the air conditioner. Compared with the related art, the computer program product provided in the embodiment of the application has the same beneficial effects as the electric heating circuit protection control method provided in the above-mentioned embodiment, and details are not repeated here.

Claims

1. An electric heating circuit protection control method applied to an air conditioner, the air conditioner comprising at least a water tank, the water tank comprising at least a controller and an electric heating device connected to each other, wherein, The electric heating open-circuit protection control method comprises: locking the controller into an off state when receiving an electric heating control instruction and the power supply circuit of the electric heating device is in an open-circuit state, and starting a protection time length; judging whether the current cumulative number of protection release times is greater than or equal to a preset number; if not, releasing the lock of the controller when the protection time length reaches a preset time length, and updating the number of protection release times; if yes, continuously locking the controller into the off state.

2. The electric heating circuit protection control method of claim 1, wherein, The electric heating open-circuit protection control method further comprises: if the power supply circuit is in a pass-through state when receiving the electric heating control instruction, resetting the number of protection release times and the protection time length; when receiving a manual protection release instruction, releasing the lock of the controller and resetting the number of protection release times and the protection time length.

3. The electric heating circuit protection control method according to claim 1 or 2, wherein, The air conditioner further comprises an outdoor unit, which is in heat exchange connection with water in the water tank. After the step of locking the controller into the off state, the method further comprises: when the air conditioner is in a vacation mode, continuously locking the controller into the off state; when the air conditioner is in a non-vacation mode and the temperature of the water in the water tank is lower than a target temperature and the maximum heating temperature of the outdoor unit, controlling the outdoor unit to heat the water; after the outdoor unit stops heating, if the temperature of the water is lower than the target temperature, releasing the lock of the controller and starting the controller in the case that the number of protection release times is lower than the preset number.

4. The electric heating circuit protection control method of claim 3, wherein, After the step of starting the controller, the method further comprises: if the power supply circuit is in a pass-through state, resetting the number of protection release times; if the power supply circuit is in an open-circuit state, updating the number of protection release times and locking the controller into the off state.

5. The electric heating circuit protection control method according to claim 3 or 4, wherein, The electric heating open-circuit protection control method further comprises: when the air conditioner is in a non-vacation mode and the temperature of the water in the water tank is lower than a target temperature and higher than the maximum heating temperature of the outdoor unit, releasing the lock of the controller and starting the controller in the case that the number of protection release times is lower than the preset number.

6. The electric heating circuit protection control method according to any one of claims 3 to 5, wherein, The air conditioner further comprises an air conditioner indoor unit, and the electric heating open-circuit protection control method further comprises: if the temperature of the water in the water tank is lower than a target temperature when the air conditioner is in a non-vacation mode, judging whether the air conditioner indoor unit is in a heating state; when the air conditioner indoor unit is in a heating state, heating the water by the outdoor unit, releasing the lock of the controller and starting the controller in the case that the protection time length is greater than or equal to the preset time length and the number of protection release times is less than the preset number.

7. The electric heating circuit protection control method according to any one of claims 3 to 6, wherein, After the step of controlling the outdoor unit to heat the water, the method further comprises: when the temperature of the water is greater than or equal to the target temperature or the maximum heating temperature of the outdoor unit, controlling the outdoor unit to stop heating.

8. The electric heating circuit protection control method according to any one of claims 3 to 7, wherein, The electric heating open-circuit protection control method further comprises: When the air conditioner is in a non-vacation mode, the temperature of the water in the water tank is lower than the difference between the target temperature and the temperature hysteresis, and the temperature of the water is lower than the difference between the maximum heating temperature of the outdoor unit and the temperature hysteresis, the outdoor unit is controlled to heat the water.

9. An air conditioner wherein, The air conditioner comprises a memory, a processor, and a computer program stored on the memory and executable on the processor, and the computer program is configured to implement the steps of the electric heating circuit protection control method according to any one of claims 1 to 8.

10. A readable storage medium, wherein, The readable storage medium is a computer readable storage medium, and the computer readable storage medium stores a program for implementing the electric heating circuit protection control method, and the program is executed by a processor to implement the steps of the electric heating circuit protection control method according to any one of claims 1 to 8.

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