Compressor electric heating control method and device and electric equipment

Abstract

The application discloses a compressor electric heating control method and device and electric equipment, the method detects the current environment temperature, and determines the shutdown time length of the unit where the compressor is located, controls the compressor to start the electric heating preheating compressor oil in different modes, realizes the function of adaptively adjusting the compressor oil preheating mode according to the scene where the compressor is located, solves the problems that in the prior art, the compressor oil is heated at a fixed power for a fixed time length, not only the insufficient heating leads to the damage of the compressor, but also the long heating time leads to the waste of electric energy.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of intelligent control, and particularly relates to a compressor electric heating control method and device and an electric equipment. BACKGROUND

[0002] At present, the use rate of air conditioners is higher and higher, and customers pay more and more attention to the comfort, reliability and energy efficiency of air conditioners.

[0003] In some areas with low temperature, customers need to start heating, but the compressor is in a low-temperature outdoor environment, and the compressor lubricating liquid is prone to solidification and freezing. Before starting, the electric heating needs to be started to preheat the compressor oil. However, under the premise that the power-off time of the air conditioner cannot be known, the compressor oil is usually heated at a fixed power for a fixed time, which not only causes insufficient heating and damages the compressor, but also causes waste of electric energy due to long heating time. SUMMARY

[0004] The present application aims to overcome the above technical deficiencies, and provides a compressor electric heating control method, device and electric equipment to solve the problem of insufficient heating and damage to the compressor due to fixed power and fixed time heating of the compressor oil, and the problem of waste of electric energy due to long heating time.

[0005] To achieve the above technical purposes, the present application adopts the following technical solutions:

[0006] According to a first aspect of the present application, a compressor electric heating control method is provided, comprising:

[0007] detecting a current ambient temperature;

[0008] determining the shutdown time of the unit where the compressor is located;

[0009] controlling the compressor to start electric heating to preheat the compressor oil in different modes according to the ambient temperature and the shutdown time.

[0010] Optionally, the method further comprises:

[0011] determining whether the ambient temperature is greater than a first temperature threshold;

[0012] if the ambient temperature is greater than the first temperature threshold, controlling the compressor not to start electric heating to preheat the compressor oil;

[0013] controlling the compressor to start electric heating to preheat the compressor oil in different modes according to the ambient temperature and the shutdown time, specifically:

[0014] If the ambient temperature is less than or equal to a first temperature threshold, the compressor is controlled to start the electric heating to preheat the compressor oil in different modes according to the ambient temperature and the shutdown duration.

[0015] Optionally, the determination of the shutdown duration of the unit where the compressor is located comprises:

[0016] detecting a residual charge amount of a gold capacitor after the gold capacitor is discharged during power-off, the gold capacitor being arranged in a clock circuit of the unit where the compressor is located;

[0017] calculating the shutdown duration of the unit where the compressor is located according to the residual charge amount.

[0018] Optionally, the control of the compressor to start the electric heating to preheat the compressor oil in different modes according to the ambient temperature and the shutdown duration comprises:

[0019] judging whether the ambient temperature is less than or equal to a second temperature threshold, the second temperature threshold being less than the first temperature threshold;

[0020] If yes, the compressor is controlled to start the electric heating to preheat the compressor oil in a first working mode according to the shutdown duration;

[0021] If no, the compressor is controlled to start the electric heating to preheat the compressor oil in the first working mode according to the shutdown duration.

[0022] Optionally, the control of the compressor to start the electric heating to preheat the compressor oil in the first working mode according to the shutdown duration comprises:

[0023] if the shutdown duration is less than a first time threshold, the electric heating is started to preheat the compressor oil at a first power for a first time duration;

[0024] if the shutdown duration is greater than or equal to the first time threshold, the electric heating is started to preheat the compressor oil at a second power for the first time duration;

[0025] wherein the second power is greater than a preset power value, and the first power is less than the preset power value.

[0026] Optionally, the control of the compressor to start the electric heating to preheat the compressor oil in a second working mode according to the shutdown duration comprises:

[0027] if the shutdown duration is less than a second time threshold, the electric heating is started to preheat the compressor oil at a third power for a second time duration;

[0028] if the shutdown duration is greater than or equal to the second time threshold, the electric heating is started to preheat the compressor oil at a fourth power for the first time duration;

[0029] The second time threshold is greater than the first time threshold, the first time length is greater than the second time length, the third power is equal to the fourth power, or the third power is not equal to the fourth power, and the third power and the fourth power are both less than a preset power value.

[0030] Optionally, the current environment temperature is detected, in particular:

[0031] After power-on booting, the current environment temperature is detected.

[0032] The compressor is controlled to start electric heating to preheat the compressor oil in different modes according to the environment temperature and the shutdown time length.

[0033] The booting logic is executed.

[0034] Optionally, the method further comprises:

[0035] If the compressor is not controlled to start electric heating to preheat the compressor oil, the booting logic is directly executed.

[0036] According to a second aspect of the present application, a compressor electric heating control device is provided, comprising:

[0037] A detection module is configured to detect a current environment temperature.

[0038] A determination module is configured to determine a shutdown time length of a unit in which the compressor is located.

[0039] A control module is configured to control the compressor to start electric heating to preheat the compressor oil in different modes according to the environment temperature and the shutdown time length.

[0040] According to a third aspect of the present application, an electric device is provided, comprising:

[0041] The compressor electric heating control device described above.

[0042] Preferably, the electric device at least comprises:

[0043] An air conditioning unit and a fresh air unit.

[0044] The technical solution provided by the embodiments of the present application can have the following beneficial effects:

[0045] By detecting the current environment temperature and determining the shutdown time length of the unit in which the compressor is located, the compressor is controlled to start electric heating to preheat the compressor oil in different modes, thereby realizing the function of adaptively adjusting the compressor oil preheating mode according to the scene in which the compressor is located, and solving the problems in the prior art that the compressor oil is heated at a fixed power for a fixed time length, which not only causes insufficient heating and leads to compressor damage, but also causes long heating time and leads to waste of electric energy.

[0046] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory and are not restrictive of the application. BRIEF DESCRIPTION OF DRAWINGS

[0047] Figure 1 is a flow chart of a compressor electric heating control method according to an exemplary embodiment;

[0048] Figure 2 is a schematic diagram of a gold capacitor equivalent circuit according to an exemplary embodiment;

[0049] Figure 3 is a flow chart of a compressor electric heating control method according to another exemplary embodiment;

[0050] Figure 4 is a schematic block diagram of a compressor electric heating control device according to an exemplary embodiment. DETAILED DESCRIPTION

[0051] In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and should not be used to limit the present application.

[0052] As described in the foregoing background, in the related art, the compressor oil is heated for a fixed time at a fixed power, which not only causes insufficient heating and damages the compressor, but also causes waste of electric energy due to long heating time.

[0053] In order to effectively solve the problems in the related art, the present application provides a compressor electric heating control method, device and electric equipment, which will be described in detail below.

[0054] Figure 1 is a flow chart of a compressor electric heating control method according to an exemplary embodiment, as shown in Figure 1 the method comprises:

[0055] Step S11, detecting a current environment temperature;

[0056] Step S12, determining a shutdown time length of a unit in which the compressor is located;

[0057] Step S13, controlling the compressor to start electric heating to preheat the compressor oil in different modes according to the environment temperature and the shutdown time length.

[0058] It should be noted that the compressor electric heating control method provided in the embodiment is loaded in a processor connected with a control panel of the compressor, or the processor is directly reused in the compressor control panel in the prior art. The compressor is installed in an electrical equipment, which includes but is not limited to an air conditioning unit and a fresh air unit.

[0059] It can be understood that the technical scheme provided in the embodiment realizes the function of adaptively adjusting the compressor oil preheating mode according to the scene where the compressor is located by detecting the current environment temperature and determining the shutdown duration of the unit where the compressor is located, and controls the compressor to start electric heating preheating of the compressor oil in different modes, which solves the problem that in the prior art, the compressor oil is heated at a fixed power for a fixed duration, which not only causes insufficient heating and damages the compressor, but also causes waste of electric energy due to long heating time.

[0060] In the step S11 of detecting the current environment temperature, the temperature sensing bag or temperature sensor of the electrical equipment can be used in actual practice.

[0061] Preferably, the step S11 specifically includes:

[0062] After the power is turned on, the current environment temperature is detected.

[0063] After the step S13, the method further includes:

[0064] The start-up logic is executed.

[0065] It can be understood that the technical scheme provided in the embodiment improves the start-up reliability of the compressor by determining whether the electric heating preheating of the compressor oil is needed before the compressor is powered on and started.

[0066] In actual practice, the method can further include:

[0067] It is determined whether the environment temperature is greater than a first temperature threshold.

[0068] If the environment temperature is greater than the first temperature threshold, the compressor is controlled not to start electric heating preheating of the compressor oil.

[0069] The step of controlling the compressor to start electric heating preheating of the compressor oil in different modes according to the environment temperature and the shutdown duration specifically includes:

[0070] If the environment temperature is less than or equal to the first temperature threshold, the compressor is controlled to start electric heating preheating of the compressor oil in different modes according to the environment temperature and the shutdown duration.

[0071] It should be noted that the first temperature threshold is set according to user needs in specific practice, or is set according to experimental data, or is set according to historical experience values. For example, it is set to 5℃.

[0072] Preferably, the method further comprises:

[0073] If the compressor is not started by the electric heating to preheat the compressor oil, the start-up logic is directly executed.

[0074] It can be understood that if the ambient temperature is high, the compressor oil will not be frozen due to the too low ambient temperature, and it is not necessary to start the electric heating to preheat the compressor oil. By limiting the ambient temperature to be less than or equal to the first temperature threshold, the compressor is controlled to start the electric heating to preheat the compressor oil in different modes according to the ambient temperature and the shutdown duration, so that the technical solution provided in the embodiment can realize effective electric heating control and better energy saving effect.

[0075] In specific practice, there are various implementation manners for determining the shutdown duration of the unit where the compressor is located in step S12. The embodiment provides a feasible solution, which comprises:

[0076] The residual charge amount of the gold capacitor after discharging during power-off is detected, and the gold capacitor is arranged in a clock circuit of the unit where the compressor is located (at present, a gold capacitor is arranged in a clock circuit of a control mainboard of the compressor for a crystal oscillator starting circuit) ;

[0077] According to the residual charge amount, the shutdown duration of the unit where the compressor is located is calculated.

[0078] It should be noted that during the storage process after charging, although there is a small leakage current in the gold capacitor, the ion or proton migration movement occurring in the capacitor is generated under the action of an electric field, and no chemical or electrochemical reaction occurs, and no new substance is generated. Moreover, the electrode material used is stable in the corresponding electrolyte, so the self-discharge time of the gold capacitor is extremely long.

[0079] The technical solution provided in the embodiment utilizes the property of the gold capacitor, and on the basis of an equivalent circuit of the gold capacitor (see Figure 2 ), the following formulas (1) and (2) are obtained. The self-discharge duration t of the gold capacitor, that is, the shutdown duration mentioned in the embodiment, is calculated according to the formulas (1) and (2), and the specific calculation is as follows:

[0080]

[0081] R s =0.4667C -0.914 (2)

[0082] The solving process of formula (1) is as follows:

[0083] ∫u c d t =Li c +R S ∫i c d t +∫u i d t

[0084]

[0085] u c(t) -u c(0) =Li c +R s i c t+u i(t) -u i(0)

[0086]

[0087] Wherein, L is equivalent series inductance, determined by the physical characteristics of the gold capacitor itself, is a known quantity; u c is the open circuit voltage of the gold capacitor, which is detected and obtained by the voltage sensor after the compressor is turned off and turned on again; i c is the load current, which is detected and obtained by the current sensor after the compressor is turned off (the mainboard power supply will continue for a period of time after the compressor is turned off) ; u L is the load voltage, which is detected and obtained by the voltage sensor after the compressor is turned off; R S is the equivalent series resistance, which is calculated by formula (2), and C in formula (2) represents the capacitance value of the gold capacitor, which is a known quantity.

[0088] It can be understood that the technical scheme provided by the embodiment is simple and reliable, does not need to change the existing compressor control circuit, is easy to deploy and convenient to implement.

[0089] In specific practice, the control of the compressor to start the electric heating to preheat the compressor oil in different modes according to the ambient temperature and the shutdown time length comprises:

[0090] determining whether the ambient temperature is less than or equal to a second temperature threshold, the second temperature threshold being less than the first temperature threshold;

[0091] if yes, controlling the compressor to start the electric heating to preheat the compressor oil in a first working mode according to the shutdown time length;

[0092] if no, controlling the compressor to start the electric heating to preheat the compressor oil in a second working mode according to the shutdown time length.

[0093] It should be noted that the second temperature threshold is set according to user needs in specific practice, or is set according to experimental data, or is set according to historical experience values. For example, it is set to -5℃.

[0094] It can be understood that the technical scheme provided by the embodiment realizes fine control of starting electric heating to preheat the compressor oil by dividing different temperature intervals of the environment. In different temperature intervals, different working modes are adopted according to the shutdown duration, so that the electric heating efficiency is higher. Compared with the prior art of starting heating the compressor oil at a fixed power for a fixed duration, it is more energy-saving and more applicable to different electric heating scenes. The prior art of starting heating the compressor oil at a fixed power for a fixed duration not only has the problem of insufficient heating leading to compressor damage, but also has the problem of long heating time leading to waste of electric energy.

[0095] In specific practice, the control of the compressor to start electric heating to preheat the compressor oil in the first working mode according to the shutdown duration includes:

[0096] If the shutdown duration is less than a first time threshold, the electric heating to preheat the compressor oil is started at a first power for a first duration.

[0097] If the shutdown duration is greater than or equal to the first time threshold, the electric heating to preheat the compressor oil is started at a second power for the first duration.

[0098] The second power is greater than a preset power value, and the first power is less than the preset power value.

[0099] It should be noted that the first time threshold and the first duration are set according to user needs in specific practice, or are set according to experimental data, or are set according to historical experience values. For example, the first time threshold is set to 3h, and the first duration is set to 2mins.

[0100] The preset power value is set according to historical experience values. The second power greater than the preset power value is a high power, and the first power less than the preset power value is a low power.

[0101] In specific practice, the control of the compressor to start electric heating to preheat the compressor oil in the second working mode according to the shutdown duration includes:

[0102] If the shutdown duration is less than a second time threshold, the electric heating to preheat the compressor oil is started at a third power for a second duration.

[0103] If the shutdown duration is greater than or equal to the second time threshold, the electric heating to preheat the compressor oil is started at a fourth power for the first duration.

[0104] The second time threshold is greater than the first time threshold, the first time length is greater than the second time length, the third power is equal to the fourth power, or the third power is not equal to the fourth power, and the third power and the fourth power are both less than a preset power value.

[0105] It should be noted that the second time threshold and the second time length are set according to user needs in specific practice, or are set according to experimental data, or are set according to historical experience values. For example, the second time threshold is set to 10h, and the second time length is set to 1min.

[0106] The preset power value is set according to historical experience values. The third power and the fourth power less than the preset power value are both small power.

[0107] It can be understood that the technical scheme provided by the embodiment realizes fine control of starting electric heating to preheat the compressor oil by dividing different intervals of the environmental temperature. In different temperature intervals, different working modes are adopted according to the shutdown time length, so that the electric heating efficiency is higher. Compared with the prior art of starting fixed power for a fixed time length to heat the compressor oil, it is more energy-saving and more applicable to different electric heating scenes. The prior art of starting fixed power for a fixed time length to heat the compressor oil not only has the problem of insufficient heating leading to compressor damage, but also has the problem of long heating time leading to waste of electric energy.

[0108] Embodiment two

[0109] Suppose the first time threshold is set to 3h, the first time length is set to 2mins, the second time threshold is set to 10h, the second time length is set to 1min, the first temperature threshold is 5℃, the second temperature threshold is -5℃, the second power greater than the preset power value is large power, the first power less than the preset power value is small power, and the third power and the fourth power are both small power, Figure 3 is a flowchart of a compressor electric heating control method according to another exemplary embodiment, as shown in Figure 3 The method comprises the following steps:

[0110] Step S21, detecting the current environmental temperature;

[0111] Step S22, determining whether the environmental temperature is greater than 5℃. If yes, the compressor is not controlled to start electric heating to preheat the compressor oil, and the start-up logic is directly executed. If not, jump to step S23;

[0112] Step S23, determining whether the environmental temperature is less than or equal to -5℃.

[0113] Step S24, if the ambient temperature is less than or equal to -5℃, and the shutdown duration is less than 3h, control the compressor to start the electric heating at a small power for 2mins; if the ambient temperature is less than or equal to -5℃, and the shutdown duration is greater than or equal to 3h, control the compressor to start the electric heating at a large power for 2mins;

[0114] Step S25, if the ambient temperature is greater than -5℃, and the shutdown duration is less than 10h, control the compressor to start the electric heating at a small power for 1min; if the ambient temperature is greater than -5℃, and the shutdown duration is greater than or equal to 10h, control the compressor to start the electric heating at a small power for 2mins;

[0115] Step S26, execute the start-up logic.

[0116] It should be noted that the compressor electric heating control method provided in this embodiment is loaded in a processor for running, the processor is connected with a control board of the compressor, or the processor is directly reused in the compressor control board in the prior art. The compressor is installed in an electrical equipment, and the electrical equipment includes but is not limited to an air conditioning unit and a fresh air unit.

[0117] It can be understood that the technical scheme provided in this embodiment realizes the fine control of starting the electric heating to preheat the compressor oil by dividing different intervals of the ambient temperature, in different temperature intervals, different working modes are adopted according to the shutdown duration, so that the electric heating efficiency is higher, compared with the prior art in which the compressor oil is heated at a fixed power for a fixed time, it is more energy-saving and more applicable to different electric heating scenes. The problem that the compressor oil is heated at a fixed power for a fixed time in the prior art not only exists the case that the heating is insufficient to cause the compressor to be damaged, but also exists the problem that the heating time is too long to cause the waste of electric energy.

[0118] Embodiment three

[0119] Figure 4 is a schematic block diagram of a compressor electric heating control device 100 according to an exemplary embodiment, as shown in Figure 4 The device 100 includes:

[0120] A detection module 101 is configured to detect a current ambient temperature.

[0121] A determination module 102 is configured to determine a shutdown duration of a unit in which the compressor is located.

[0122] A control module 103 is configured to control the compressor to start the electric heating to preheat the compressor oil in different modes according to the ambient temperature and the shutdown duration.

[0123] It should be noted that the compressor electric heating control method provided in this embodiment is loaded in a processor connected with a control panel of the compressor, or the processor directly reuses the processor on the compressor control panel in the prior art. The compressor is installed in an electrical equipment, which includes but is not limited to an air conditioning unit and a fresh air unit.

[0124] The implementation manners and beneficial effects of the modules of the technical solution provided in this embodiment can be understood with reference to the descriptions of the related steps in the above embodiments, and the embodiment will not be described herein.

[0125] It can be understood that the technical solution provided in this embodiment realizes the function of adaptively adjusting the compressor oil preheating mode according to the scene where the compressor is located by detecting the current environment temperature and determining the shutdown duration of the unit where the compressor is located, and controls the compressor to start electric heating to preheat the compressor oil in different modes, thereby solving the problems that in the prior art, the compressor oil is heated at a fixed power for a fixed duration, not only the heating is insufficient to cause damage to the compressor, but also the heating time is too long to cause waste of electric energy.

[0126] Embodiment Four

[0127] According to an exemplary embodiment, an electrical equipment is shown, which includes:

[0128] The compressor electric heating control device described above.

[0129] Preferably, the electrical equipment includes but is not limited to an air conditioning unit and a fresh air unit.

[0130] It can be understood that the technical solution provided in this embodiment realizes the function of adaptively adjusting the compressor oil preheating mode according to the scene where the compressor is located by including the compressor electric heating control device described above, which detects the current environment temperature and determines the shutdown duration of the unit where the compressor is located, and controls the compressor to start electric heating to preheat the compressor oil in different modes, thereby solving the problems that in the prior art, the compressor oil is heated at a fixed power for a fixed duration, not only the heating is insufficient to cause damage to the compressor, but also the heating time is too long to cause waste of electric energy.

[0131] Of course, those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by a computer program instructing related hardware (such as a processor, a controller, etc.), and the program can be stored in a computer-readable storage medium. When the program is executed, the processes of the above-mentioned embodiment methods can be included. The storage medium can be a memory, a magnetic disc, an optical disc, etc.

[0132] The above description of the specific embodiments of the present application is not intended to limit the scope of the present application. Any other corresponding changes and modifications made according to the technical concept of the present application should be included in the scope of protection of the claims of the present application.

Claims

1. A method of electric heating control of a compressor, characterized in that, The method comprises the following steps: detecting a current ambient temperature; determining a shutdown duration of a unit in which the compressor is located; judging whether the ambient temperature is greater than a first temperature threshold; if the ambient temperature is less than or equal to the first temperature threshold, controlling the compressor to start electric heating to preheat compressor oil in different modes according to the ambient temperature and the shutdown duration; wherein the step of controlling the compressor to start electric heating to preheat compressor oil in different modes according to the ambient temperature and the shutdown duration comprises: judging whether the ambient temperature is less than or equal to a second temperature threshold, the second temperature threshold being less than the first temperature threshold; if yes, controlling the compressor to start electric heating to preheat compressor oil in a first working mode according to the shutdown duration; if no, controlling the compressor to start electric heating to preheat compressor oil in a second working mode according to the shutdown duration; the step of controlling the compressor to start electric heating to preheat compressor oil in the first working mode according to the shutdown duration comprises: if the shutdown duration is less than a first time threshold, starting electric heating to preheat compressor oil at a first power for a first time duration; if the shutdown duration is greater than or equal to the first time threshold, starting electric heating to preheat compressor oil at a second power for the first time duration; the second power is greater than a preset power value, and the first power is less than the preset power value; the step of controlling the compressor to start electric heating to preheat compressor oil in the second working mode according to the shutdown duration comprises: if the shutdown duration is less than a second time threshold, starting electric heating to preheat compressor oil at a third power for a second time duration; if the shutdown duration is greater than or equal to the second time threshold, starting electric heating to preheat compressor oil at a fourth power for the first time duration; the second time threshold is greater than the first time threshold, the first time duration is greater than the second time duration, and the third power and the fourth power are both less than the preset power value.

2. The method of claim 1, wherein, The method further comprises: if the ambient temperature is greater than the first temperature threshold, controlling the compressor not to start electric heating to preheat compressor oil.

3. The method of claim 2, wherein, The step of determining the shutdown duration of the unit in which the compressor is located comprises: detecting a residual charge amount of a gold capacitor after the gold capacitor is discharged during power-off, the gold capacitor being arranged in a clock circuit of the unit in which the compressor is located; calculating the shutdown duration of the unit in which the compressor is located according to the residual charge amount.

4. The method according to any one of claims 1 to 3, characterized in that, The step of detecting a current ambient temperature specifically comprises: detecting the current ambient temperature after power-on and boot-up; after the step of controlling the compressor to start electric heating to preheat compressor oil in different modes according to the ambient temperature and the shutdown duration, the method further comprises: executing boot-up logic.

5. The method of claim 4, wherein, The method further comprises: if the compressor is controlled not to start electric heating to preheat compressor oil, directly executing the boot-up logic.

6. A compressor electric heating control device characterized by, The compressor electric heating control device is used for executing the compressor electric heating control method in any one of claims 1 to 5, and comprises: a detection module configured to detect a current ambient temperature; a determination module configured to determine a shutdown duration of a unit in which the compressor is located; a control module configured to control the compressor to start electric heating to preheat compressor oil in different modes according to the ambient temperature and the shutdown duration.

7. An electric device, characterized by The compressor electric heating control device comprises: the compressor electric heating control device according to claim 6.

8. The powered device of claim 7, wherein, The compressor electric heating control device comprises: an air conditioning unit and a fresh air unit.

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