CN108638789B - Parking air conditioner voltage detection control method and parking air conditioner - Google Patents
Parking air conditioner voltage detection control method and parking air conditioner Download PDFInfo
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- CN108638789B CN108638789B CN201810476303.9A CN201810476303A CN108638789B CN 108638789 B CN108638789 B CN 108638789B CN 201810476303 A CN201810476303 A CN 201810476303A CN 108638789 B CN108638789 B CN 108638789B
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- 238000004378 air conditioning Methods 0.000 description 4
- 239000002826 coolant Substances 0.000 description 4
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00735—Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
- B60H1/00878—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
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Abstract
Powering on the parking air conditioner, and judging whether the power supply voltage meets the operation condition; if so, sampling the environment temperature in the vehicle; judging whether the environment temperature in the vehicle meets a starting condition or not; if yes, outputting a starting control signal to the outdoor driving module, and starting the compressor; judging a temperature gear interval to which the environment temperature in the vehicle belongs, outputting a corresponding gear control signal, and enabling the compressor to work according to the frequency corresponding to the gear control signal; judging whether a shutdown condition is met or not and whether the power supply voltage meets a protection condition or not; if the output signal meets the requirement, a stop control signal is output to the outdoor driving module, and the outdoor driving module drives the compressor to stop. Also discloses a parking air conditioner. The invention improves the cruising ability of the parking air conditioner, well protects the parking air conditioner, reduces the probability of communication faults and improves the practicability of the parking air conditioner.
Description
Technical Field
The invention relates to the technical field of air conditioning equipment, in particular to a parking air conditioner voltage detection control method and a parking air conditioner.
Background
The parking air conditioner is an air conditioner used during parking waiting and rest, is usually installed on trucks and vans, and can be used by drivers in long-distance driving. The conventional parking air conditioner includes the following forms: the first is that a diesel generator drives a compressor to operate, and further drives a refrigerant to circulate in a sealed refrigeration system through the compressor, wherein the diesel generator adopts water as a cooling medium; the second is also to drive the compressor by a diesel generator, but to use the flowing air as a cooling medium; the third is to drive the compressor to run by a gasoline generator; and fourthly, driving the compressor to operate by the direct current power supply.
It will be appreciated that in the first three modes, fuel is required as a power source, and therefore, operating the parking air conditioner will significantly increase the fuel consumption of the vehicle. In addition, no matter water is used as a cooling medium or air is used as the cooling medium, the service life of the generator is difficult to meet the actual use requirement, and the maintenance cost is high. If left unattended, it can also cause irreversible damage to the generator. The above problems can be effectively solved by using a dc power source as a power source, and chinese patent application "an automobile and its parking air conditioning system" (No. CN 206374503U) discloses an air conditioning system for parking an automobile, which includes an air conditioning device disposed on an automobile body, driven by an energy source independent of an engine, and used for adjusting the temperature of the environment inside the automobile. The above patent application further discloses the following technical contents, and in the paragraph [0031] of the specification, a temperature detection module … is further added for detecting the ambient temperature in the vehicle, so as to combine the required temperature of the setting operation and the temperature in the vehicle to perform a comprehensive judgment, and further to correct the output power adjustment value of the air conditioner. "
In the technical solutions disclosed in the above patents, since the required temperature of the setting operation and the temperature in the vehicle need to be comprehensively determined, and then the output power of the air conditioner, especially the adjustment value of the output power of the compressor needs to be corrected, that is, a variable needs to be repeatedly corrected, a control module for controlling the output power of the compressor needs to be provided in the outdoor unit, a driving module for driving the compressor, the fan and other refrigeration components needs to be provided, and the indoor control module and the outdoor control module adopt a feedback control mode of bidirectional communication. On the one hand, the control cost of the equipment is increased, and on the other hand, the control module may need to work in a humid environment for a long time due to the unstable operating environment of the parking air conditioner, and the possibility of communication failure is very high. Once a communication fault occurs, a complex process is needed in the prior art to determine a fault point and maintain the fault point, so that the actual use effect is poor.
Disclosure of Invention
The invention discloses a control method of a parking air conditioner, aiming at improving the cruising ability and the practicability of the parking air conditioner.
A voltage detection control method for a parking air conditioner is characterized by comprising the following steps: the method comprises the following steps:
the parking air conditioner is powered on, and the indoor control module samples power supply voltage and judges whether the power supply voltage meets the operation condition; wherein the operating conditions are: the power supply voltage is greater than a low-voltage protection set value and less than a high-voltage cut-off set value;
if the running condition is met, the indoor control module samples the environment temperature in the vehicle;
the indoor control module judges whether the environment temperature in the vehicle meets a starting condition or not; if the starting condition is met, the indoor control module outputs a starting control signal to the outdoor driving module through the first signal path, and the outdoor driving module drives the compressor to start;
the indoor control module judges a temperature gear interval to which the environment temperature in the vehicle belongs, outputs a corresponding gear control signal to the outdoor driving module through a second signal path, and the outdoor driving module drives the compressor to work according to the frequency corresponding to the gear control signal;
the indoor control module judges whether the environment temperature in the vehicle meets a shutdown condition or not and judges whether the power supply voltage meets a protection condition or not; wherein the protection conditions are as follows: the power supply voltage is greater than a high-voltage cutoff set value or less than a low-voltage protection set value; if the environment temperature in the vehicle meets the shutdown condition or the power supply voltage meets the protection condition, the indoor control module outputs a shutdown control signal to the outdoor driving module through the first signal path, and the outdoor driving module drives the compressor to shutdown.
Further, the method also comprises the following steps:
the indoor control module samples a set temperature and calls at least one reference temperature;
the indoor control module calculates a sum of a set temperature and the reference temperature;
the indoor control module sets the sum as a lower threshold of a higher temperature gear interval of two continuous temperature gear intervals, and sets the sum as an upper threshold of a lower temperature gear interval of the two continuous temperature gear intervals.
Furthermore, the indoor control module samples the set temperature and calls a first reference temperature;
the indoor control module calculates a sum of the set temperature and the first reference temperature;
the indoor control module sets the sum as a lower threshold of a first temperature gear interval and an upper threshold of a second temperature gear interval;
when the environment temperature in the vehicle belongs to the first temperature gear interval, the indoor control module outputs a first level signal to the outdoor driving module through a second signal path, and the outdoor driving module drives the compressor to work according to a first frequency; when the environment temperature in the vehicle belongs to a second temperature gear interval, the indoor control module outputs a second level signal to the outdoor driving module through a second signal path, and the outdoor driving module drives the compressor to work according to a second frequency; wherein the first frequency is higher than the second frequency.
Further, the method comprises the following steps:
the indoor control module samples a set temperature and calls a second reference temperature;
the indoor control module calculates a difference value between the set temperature and the second reference temperature;
and the indoor control module sets the difference value as a lower limit threshold value of the second temperature gear interval.
Further, the method comprises the following steps:
the indoor control module samples a set temperature and calls a third reference temperature;
the indoor control module calculates a difference value between the set temperature and the third reference temperature;
the indoor control module sets the difference value between the set temperature and the third reference temperature as the lower limit threshold of the starting condition, and sets the difference value between the set temperature and the third reference temperature as the upper limit threshold of the stopping condition;
the third reference temperature is less than or equal to the second reference temperature.
Furthermore, if the ambient temperature in the vehicle meets the starting condition, a first timer in the indoor control module is started, and when the timing parameter of the first timer reaches a first time length, the indoor control module outputs a starting control signal to the outdoor driving module through a first signal path.
Furthermore, if the power supply voltage is greater than the high-voltage cutoff set value, a second timer in the indoor control module is started, and when the timing parameter of the second timer reaches a second duration, the indoor control module continuously outputs multiple high-voltage alarm signals and generates a shutdown signal by taking the second duration as an interval.
Furthermore, if the power supply voltage is smaller than the low-voltage protection set value, the indoor control module judges whether the power supply voltage is larger than a low-voltage cut-off set value; if the power supply voltage is greater than the low-voltage cutoff set value, a third timer in the indoor control module is started, when the timing parameter of the third timer reaches a third duration, the indoor control module outputs a shutdown control signal to the outdoor driving module through the first signal path, and the outdoor driving module drives the compressor to stop; the indoor control module judges whether the power supply voltage is greater than the recovery set voltage or not, when the power supply voltage is greater than the recovery set voltage and the timing parameter of the third timer is greater than the protection duration, if the ambient temperature in the vehicle meets the starting condition again, the indoor control module outputs a starting control signal to the outdoor driving module through the first signal path, and the outdoor driving module drives the compressor to start again.
Furthermore, when the timing parameter of the third timer reaches a third duration and the power supply voltage is less than the low-voltage cutoff set value, the indoor control module generates a shutdown signal; if the indoor control module receives a starting signal again, firstly, whether the power supply voltage is greater than the low-voltage cut-off set value is judged, if so, whether the power supply voltage is greater than the recovery voltage is judged, if the power supply voltage is greater than the recovery set voltage and the timing parameter of the third timer is greater than the protection duration, and if the ambient temperature in the vehicle meets the starting condition again, the indoor control module outputs a starting control signal to the outdoor driving module through a first signal path, and the outdoor driving module drives the compressor to start again; and if the power supply voltage is smaller than the low-voltage cutoff set value, the indoor control module generates a shutdown signal again.
According to the voltage detection control method for the parking air conditioner, disclosed by the invention, the compressor of the parking air conditioner can work at different gears according to different working conditions, so that the parking air conditioner has the purposes of high response speed, energy conservation and environmental protection, the cruising ability of a direct-current power supply is improved, meanwhile, a control module is not arranged in an outdoor unit, an indoor control module and an outdoor driving module are in one-way communication, the occurrence probability of communication faults is greatly reduced, the maintenance period and the service life of the parking air conditioner are longer, and the practicability is better.
Meanwhile, the parking air conditioner adopts a parking air conditioner voltage detection control method, and the parking air conditioner voltage detection control method comprises the following steps:
the parking air conditioner is powered on, and the indoor control module samples power supply voltage and judges whether the power supply voltage meets the operation condition; wherein the operating conditions are: the power supply voltage is greater than a low-voltage protection set value and less than a high-voltage cut-off set value;
if the running condition is met, the indoor control module samples the environment temperature in the vehicle;
the indoor control module judges whether the environment temperature in the vehicle meets a starting condition or not; if the starting condition is met, the indoor control module outputs a starting control signal to the outdoor driving module through the first signal path, and the outdoor driving module drives the compressor to start;
the indoor control module judges a temperature gear interval to which the environment temperature in the vehicle belongs, outputs a corresponding gear control signal to the outdoor driving module through a second signal path, and the outdoor driving module drives the compressor to work according to the frequency corresponding to the gear control signal;
the indoor control module judges whether the environment temperature in the vehicle meets a shutdown condition or not and judges whether the power supply voltage meets a protection condition or not; wherein the protection conditions are as follows: the power supply voltage is greater than a high-voltage cutoff set value or less than a low-voltage protection set value; if the environment temperature in the vehicle meets the shutdown condition or the power supply voltage meets the protection condition, the indoor control module outputs a shutdown control signal to the outdoor driving module through the first signal path, and the outdoor driving module drives the compressor to shutdown.
The parking air conditioner disclosed by the invention has the advantage of good practicability.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a flow chart illustrating a first exemplary embodiment of a voltage detection control method for a parking air conditioner according to the present disclosure;
FIG. 2 is a flowchart illustrating steps for generating a temperature shift interval in the parking air conditioner voltage detection control method disclosed in FIG. 1;
FIG. 3 is a flowchart illustrating a step of an alarm protection in the voltage detection control method for the parking air conditioner disclosed in FIG. 1;
FIG. 4 is a flowchart illustrating a first protection step of the compressor in the voltage detection control method for the parking air conditioner disclosed in FIG. 1;
FIG. 5 is a flowchart illustrating a second protection step of the compressor in the voltage detection control method for the parking air conditioner disclosed in FIG. 1;
fig. 6 is a block diagram schematically illustrating the structure of the parking air conditioner disclosed in the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a flowchart illustrating a parking air conditioner voltage detection control method according to an embodiment of the present invention. The parking air conditioner adopts a 24V direct current power supply, namely a storage battery for supplying power. The parking air conditioner receives a starting instruction generated by a remote controller, a mobile terminal or a man-machine interaction interface and is in a standby state when the parking air conditioner is started, and as shown in figure 1, the voltage detection control method of the parking air conditioner specifically comprises the following steps:
and S100, powering on the parking air conditioner, sampling the power supply voltage by the indoor control module, and further judging whether the power supply voltage meets the operation condition. Wherein, the operation conditions are as follows: the power supply voltage is greater than the low-voltage protection set value and less than the high-voltage cutoff set value. The low-pressure protection set value and the high-pressure stop set value are obtained by professionals based on a large number of experiments, and are different for different types of air conditioners. The low-voltage protection set value and the high-voltage cutoff set value are stored in a fixed value form and are called by the indoor control module at any time. When the operation condition is satisfied, the parking air conditioner may be normally operated under the control method disclosed in the present embodiment. Preferably, when the power supply voltage meets the operating condition and lasts for 5 seconds, the indoor control module determines that the operating condition is met, and misdetermination caused by voltage fluctuation is avoided.
And S101, when the running condition is met, the indoor control module samples the environment temperature in the vehicle. The temperature sensor for detecting the ambient temperature in the vehicle is preferably arranged on the air return opening of the indoor unit of the parking air conditioner. And the indoor control module judges whether a compressor of the parking air conditioner meets a starting condition or not according to the sampled environment temperature in the vehicle. The starting condition can be set according to the type of the parking air conditioner and the specific working condition after the parking air conditioner is installed on the vehicle. Wherein, the indoor control module is an MCU.
And S102, if the sampled environment temperature in the vehicle meets the starting condition, the indoor control module outputs a starting control signal to the outdoor driving module through the first signal path. And the outdoor driving module drives the compressor to start after receiving the starting control signal. The outdoor driving module may be an ipm (intelligent Power module), i.e., an intelligent Power control module and its peripheral circuits, or may be a similar driving circuit or driving chip, which is not limited herein.
And step S103, after the outdoor driving module drives the compressor to start, the indoor control module further judges the temperature gear interval to which the environment temperature in the vehicle belongs. The temperature gear interval can be set according to the type of the parking air conditioner and the specific working condition after the parking air conditioner is installed on the vehicle. Each temperature gear interval corresponds to an independent gear control signal, and after the outdoor driving module receives the gear control signal from the indoor control module, the compressor is automatically driven to operate according to the frequency corresponding to the gear control signal.
Step S104, after the temperature gear interval to which the environment temperature in the automobile belongs is judged, the indoor control module outputs a corresponding gear control signal to the outdoor driving module through the second signal path; and the outdoor driving module drives the compressor to work according to the frequency corresponding to the gear control signal and maintains the corresponding frequency unchanged.
And step S1051, in the running process, the indoor control module continuously judges whether the environment temperature in the vehicle meets the shutdown condition or not. Similarly, the shutdown condition may also be set according to the type of the parking air conditioner and the specific working condition after the installation on the vehicle is finished.
In step S1052, during the operation, the indoor control module determines whether the power supply voltage satisfies the protection condition. Wherein the protection conditions are as follows: the power supply voltage is greater than a high-voltage cutoff set value or less than a low-voltage protection set value. When the power supply voltage is greater than the high-voltage cutoff set value, the motor or devices on the circuit in the parking air conditioner may not work normally, and further irreversible damage may be caused. And when the power voltage is lower than the low-voltage protection value, the normal operation of the parking air conditioner is influenced.
And step S106, if the environment temperature in the vehicle meets the shutdown condition or the power supply voltage meets the protection condition, the indoor control module outputs a shutdown control signal to the outdoor driving module through the first signal path.
And step S107, the outdoor driving module controls the compressor to stop after receiving the stop control signal.
According to the voltage detection control method for the parking air conditioner, disclosed by the invention, the parking air conditioner works under a perfect protection mechanism, and the compressor can work at different gears according to different working conditions, so that the parking air conditioner has the purposes of high response speed, energy conservation and environmental protection, the cruising ability of a direct current power supply is improved, meanwhile, a control module is not arranged in an outdoor unit, an indoor control module and an outdoor driving module are in one-way communication, the occurrence probability of communication faults is greatly reduced, the maintenance period and the service life of the parking air conditioner are longer, and the practicability is better.
In order to adapt to different working conditions and actual requirements of users and optimize the start-stop and working gear of the parking air conditioner compressor, a method for setting a temperature gear interval, which is suitable for the control method, is described below.
Specifically, at least one reference temperature is stored in the parking air conditioner. The reference temperature may be an empirical value, but preferably, the reference temperature may be calculated based on big data according to different vehicle models, different geographic parameters and use environments. The indoor control module can call the reference temperature at any time.
And a user inputs the set temperature to the indoor control module through the remote controller, the mobile terminal and the man-machine interaction interface according to actual needs. The indoor control module sets a plurality of continuous temperature gear intervals according to the set temperature, and each temperature gear interval corresponds to one corresponding gear control signal. The operating frequency and the temperature gear range corresponding to the gear control signals are in a monotonous relation. That is, the higher the threshold value of the temperature step interval, the higher the compressor operating frequency.
The indoor control module calculates a sum of the set temperature and the reference temperature. The indoor control module further sets the sum to be a lower threshold of a higher temperature gear interval of the two consecutive temperature gear intervals, and sets the sum to be an upper threshold of a lower temperature gear interval of the two consecutive temperature gear intervals.
As shown in fig. 2, taking setting two temperature shift ranges as an example, specifically, the control method further includes the following steps:
in step S1040, the indoor control module samples the set temperature and calls the first reference temperature.
In step S1041, the indoor control module calculates a sum of the set temperature and the first reference temperature.
In step S1042, the indoor control module sets the sum as a lower threshold of the first temperature step interval, and sets the sum as an upper threshold of the second temperature step interval. That is, if the vehicle internal environment temperature is higher than the lower threshold value of the first temperature range, the vehicle belongs to the first temperature range. And if the environment temperature in the vehicle is lower than the upper limit threshold value of the second temperature gear interval and meets the starting condition, the vehicle belongs to the second temperature gear interval. In this way, the set temperature is set according to the use requirement of the user, so the first temperature gear interval and the second temperature gear interval are changed according to the use requirement of the user, the running state of the compressor is closely related to the user requirement, and the parking air conditioner can quickly respond to the user requirement to realize good refrigeration effect.
To achieve more accurate compressor control, the indoor control module also invokes a second reference temperature. Wherein the second reference temperature is less than the first reference temperature. And the indoor control module calculates a difference value between the set temperature and the second reference temperature, and sets the difference value as a lower limit threshold value of the second temperature gear interval. And if the environment temperature in the vehicle is lower than the upper threshold of the second temperature gear interval and higher than the lower threshold of the second temperature gear interval, the vehicle belongs to the second temperature gear interval. The lower limit threshold value of the second temperature gear interval is independently set, so that the influence caused by the deviation of the detection precision of the environment temperature in the vehicle can be reduced, and the condition that the compressor is shut down by mistake is avoided.
And step S1043-1, the indoor control module judges that the environment temperature in the vehicle belongs to a first temperature gear interval.
In step S1044-1, the indoor control module outputs the first level signal to the outdoor driving module through the second signal path. Preferably, the first level signal is a high level signal.
In step S1045-1, after the input port of the outdoor driving module receives the high level signal through the second signal path, the compressor is driven to operate according to the first frequency, that is, to operate at a high frequency gear.
Similarly, in step S1043-2, the indoor control module determines that the ambient temperature in the vehicle belongs to a second temperature range interval.
In step S1044-2, the indoor control module outputs a second level signal to the outdoor driving module through the second signal path. Preferably, the second level signal is a low level signal.
Step S1045-2, after the input port of the outdoor driving module receives the low level signal through the second signal path, the compressor is driven to operate according to a second frequency, where the second frequency is smaller than the first frequency, that is, the compressor operates in a low-frequency gear.
It will be appreciated that if the indoor control module invokes multiple reference temperatures, temperature step intervals with more gradients may be formed. When the indoor control module judges that the ambient temperature in the vehicle falls into any one temperature gear interval, the indoor control module outputs an independent gear control signal through an independent signal path to control the compressor to operate according to the corresponding frequency. In this way, a more precise control of the compressor can be achieved.
In order to realize the accurate control of the start and stop of the compressor, the control method also comprises the following steps:
the indoor control module samples the set temperature and calls a third reference temperature.
The indoor control module calculates a difference between the set temperature and a third reference temperature.
The indoor control module sets a difference value between the set temperature and the third reference temperature as a lower limit threshold value of the startup condition, and sets a difference value between the set temperature and the third reference temperature as an upper limit threshold value of the shutdown condition. That is to say, when the ambient temperature in the vehicle is greater than the lower threshold of the starting condition, the indoor control module outputs a starting control signal to the outdoor driving module through the first signal path, and the outdoor driving module drives the compressor to start. When the environment temperature in the vehicle is smaller than the upper limit threshold of the shutdown condition, the indoor control module outputs a shutdown control signal through the second signal path, and the outdoor driving module drives the compressor to shutdown. Preferably, the third reference temperature is lower than the second reference temperature, and the allowance of the determination condition is larger, so as to avoid false start or false stop caused by the detection error of the environment temperature in the vehicle. If the detection accuracy of the in-vehicle ambient temperature is high, the second reference temperature and the third reference temperature may also be set to be equal. Optionally, the first reference temperature is 5 degrees celsius, and the second reference temperature is 3 degrees celsius.
In order to improve the use comfort of the parking air conditioner, when the outdoor driving module receives the starting control signal, the outdoor fan is driven to start and operate at a set speed, and the indoor control module drives the indoor fan to operate at the set speed. When the outdoor driving module receives the stop control signal, the outdoor fan is driven to stop, the indoor control module drives the indoor fan to operate at a set speed, and the comfortableness in the vehicle is kept while energy is saved.
To protect the compressor, it is preferable that a first timer in the indoor control module is started if the ambient temperature in the vehicle satisfies the start condition. When the first timer reaches a first duration condition, the indoor control module outputs a starting signal to the outdoor driving module through the first signal path. Preferably, the first time condition is 60 seconds.
In the disclosed control method, various warning and protection mechanisms of the parking air conditioner are provided when the power supply voltage does not satisfy the operating condition. Fig. 3 shows the specific steps of an alarm mechanism:
and step S200, in the power-on state of the parking air conditioner, the indoor control module continuously samples the power supply voltage and judges whether the power supply voltage is greater than a high-voltage cut-off set value.
Step S201, when the compressor is running, if the power voltage is sampled to be greater than the high voltage cut-off setting value, it indicates that the power voltage may cause the motor or part of the devices to be unable to work, further causing irreversible damage, and in this state, the second timer in the indoor control module is started.
Step S202, if the timing parameter of the second timer reaches a second duration and the power supply voltage is still greater than the high voltage cutoff setting value, the power supply voltage is too high, and the protection condition is satisfied.
And step S203, the indoor control module continuously outputs multiple high-pressure alarm signals at intervals of the second time length to prompt an operator that the parking air conditioner has faults.
And step S204, in order to avoid damage to the parking air conditioner, the indoor control module generates a shutdown control signal, the parking air conditioner is shut down, and the compressor and other functional components stop working.
Through the steps, when the power supply voltage is too high, the parking air conditioner is protected.
As shown in fig. 4, there is also provided a protection mechanism for a parking air conditioner, which specifically includes the following steps:
and step S300, under the condition that the parking air conditioner is powered on, the indoor control module continuously samples the power supply voltage and judges whether the power supply voltage is smaller than a low-voltage protection set value.
Step S301, when the compressor runs, if the power supply voltage is smaller than the low-voltage protection set value, the indoor control module judges whether the power supply voltage is larger than the low-voltage cut-off set value. Similar to the high pressure cutoff set point, the low pressure cutoff set point is also based on a number of experiments. The low pressure cutoff set value is less than the low pressure protection set value.
In step S302, if the power voltage is greater than the low voltage cutoff setting value, the third timer is started and the timing parameter of the third timer reaches a third duration.
Step S303, when the timing parameter of the third timer reaches the third duration, if the power supply voltage is still greater than the low-voltage cutoff setting value, the protection condition is satisfied, and the indoor control module outputs the shutdown control signal to the outdoor driving module through the first signal path. The third period of time is preferably set to 5 seconds.
And step S304, the outdoor driving module drives the compressor to stop, so that impact on the system caused by too low voltage is avoided. Meanwhile, the fan in the control room operates according to a low wind gear, and the buzzer or the indicator lamp operates in a specific form to prompt a user that the power supply voltage is low. And starting timing by the third timer at the same time when the outdoor driving module drives the compressor to stop.
In step S305, the indoor control module continuously samples the power voltage and determines whether the power voltage is greater than the recovery setting voltage. Similar to the low-pressure cutoff set value, the recovery set voltage is obtained based on a large number of experiments, and the recovery set voltage can ensure the minimum working time (usually 3 minutes) of the compressor and avoid frequent start and stop of the compressor. When the power supply voltage is greater than the recovery set voltage, the storage battery starts to be charged. The recovery set voltage is greater than the low-voltage protection set value.
And step S306, if the power supply voltage is greater than the recovery set voltage and the timing parameter of the third timer reaches the protection duration, allowing the compressor to be started again. The protection period is preferably set to 3 minutes.
In step S307, it is determined whether the vehicle interior environment temperature satisfies the start condition again.
And step S308, if the ambient temperature in the vehicle meets the starting condition again, the indoor control module outputs a starting control signal to the outdoor driving module through the first signal path.
In step S309, the outdoor driving module drives the compressor to start again.
Through the mode, when the voltage is lower or in the charging state, the compressor can be automatically well protected, and the compressor is prevented from being frequently started and stopped, so that extra energy consumption and damage to the compressor are avoided.
Fig. 5 shows another protection mechanism for a compressor, which includes the following steps:
step S400, under the condition that the parking air conditioner is powered on, the indoor control module continuously samples the power supply voltage and judges whether the power supply voltage is smaller than a low-voltage cut-off set value or not, and whether the time parameter of the third timer reaches a third time length or not.
Step S401, when the two conditions are both satisfied, the protection condition is satisfied, and the indoor control module generates a shutdown signal. The compressor and the fan in the parking air conditioner are both in a stop state. And when the indoor control module generates a shutdown signal, the third timer is reset and starts timing again.
Step S402, the indoor control module receives the starting signal generated by the remote controller, the terminal or the human-computer interaction interface again.
In step S403, the indoor control module determines whether the power supply voltage is greater than a low voltage cutoff setting value.
If the power supply voltage is smaller than the low-voltage cutoff set value, the indoor control module generates a shutdown signal again, and a warning is formed through the buzzer and/or the indicator lamp. At the same time, the third timer is cleared and begins timing again. If the power supply voltage is greater than the low voltage cutoff set value, the indoor control module determines whether the power supply voltage is greater than the recovery voltage in step S404.
In step S405, if the power supply voltage is greater than the recovery voltage, it is determined whether the timing parameter of the third timer is greater than the guard period.
Step S406, if the timing parameter of the third timer is greater than the protection duration, further determining whether the ambient temperature in the vehicle meets the start condition again.
In step S407, if the start condition is satisfied again, the indoor control module outputs a start control signal to the outdoor driving module through the first signal path.
In step S408, the outdoor driving module drives the compressor to start again.
Through the mode, when the voltage is lower than the low-voltage cut-off set value, the compressor can be automatically well protected, and the phenomenon that the compressor is frequently started and stopped to cause extra energy consumption and damage to the compressor is avoided.
Different from a common split air conditioner, the parking air conditioner adopts a 24V direct-current power supply and usually supplies power for a storage battery, and the control mode is adopted, so that on one hand, the compressor can be started and stopped according to the user requirement corresponding to the set temperature or works at different frequency gears, and the energy consumption of the compressor is effectively reduced; on the other hand, the internal structure of the outdoor unit is simplified, a control panel of the outdoor unit is not arranged, bidirectional communication is simplified into unidirectional communication, the probability of communication faults is reduced, the response speed of the parking air conditioner is improved, and the parking air conditioner has better user experience. In the whole operation process, an engine of the vehicle does not need to be started, the oil consumption of the vehicle is avoided being increased, and multiple protection on the compressor is automatically formed.
The invention also discloses a parking air conditioner, which adopts the voltage detection control method of the parking air conditioner. The specific steps of the parking air conditioner voltage detection control method refer to the detailed description of the above embodiments and the detailed description of the drawings in the specification, and are not repeated herein. The parking air conditioner adopting the control method can achieve the same technical effect.
As shown in fig. 3, the parking air conditioner specifically includes an indoor control module 10 and an outdoor driving module 20. Two input ends of the indoor control module 10 respectively receive a detected value and a set temperature of the ambient temperature in the vehicle. At least one output terminal of the indoor control module 10 outputs an indoor fan control signal, a speed control signal, etc. to the indoor fan 50. The indoor control module 10 and the outdoor driving module 20 are in one-way communication, the indoor control module 10 outputs a start control signal and/or a stop control signal to the outdoor driving module 20 through the first signal path 10-3, and the outdoor driving module 20 drives the compressor 30 to perform corresponding work. The indoor control module 10 outputs a gear control signal to the outdoor driving module 20 through the second signal path 10-4, and the outdoor driving module 20 drives the compressor 30 to operate according to a frequency corresponding to the gear. The outdoor driving module 20 also drives the operation of the outdoor fan 40. Power supply paths 10-1 and 10-2 are also arranged between the indoor control module 10 and the outdoor driving module 20. The first signal path and the second signal path which are independently arranged can ensure the transmission rate of signals on one hand, and are convenient for positioning fault points on the other hand, thereby being beneficial to the subsequent maintenance of the parking air conditioner.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (8)
1. A voltage detection control method for a parking air conditioner is characterized by comprising the following steps: the method comprises the following steps:
the parking air conditioner is powered on, and the indoor control module samples power supply voltage and judges whether the power supply voltage meets the operation condition; wherein the operating conditions are: the power supply voltage is greater than a low-voltage protection set value and less than a high-voltage cut-off set value;
if the running condition is met, the indoor control module samples the environment temperature in the vehicle;
the indoor control module judges whether the environment temperature in the vehicle meets a starting condition or not; if the starting condition is met, the indoor control module outputs a starting control signal to the outdoor driving module through the first signal path, and the outdoor driving module drives the compressor to start;
the indoor control module judges a temperature gear interval to which the environment temperature in the vehicle belongs, outputs a corresponding gear control signal to the outdoor driving module through a second signal path, and the outdoor driving module drives the compressor to work according to the frequency corresponding to the gear control signal;
the indoor control module judges whether the environment temperature in the vehicle meets a shutdown condition or not and judges whether the power supply voltage meets a protection condition or not; wherein the protection conditions are as follows: the power supply voltage is greater than a high-voltage cutoff set value or less than a low-voltage protection set value; if the environment temperature in the vehicle meets the shutdown condition or the power supply voltage meets the protection condition, the indoor control module outputs a shutdown control signal to the outdoor driving module through the first signal path, and the outdoor driving module drives the compressor to stop;
if the power supply voltage is smaller than a low-voltage protection set value, the indoor control module judges whether the power supply voltage is larger than a low-voltage cut-off set value; if the power supply voltage is larger than the low-voltage cutoff set value, a third timer in the indoor control module is started;
when the timing parameter of the third timer reaches a third duration and the power supply voltage is kept to be greater than the low-voltage cutoff set value, the indoor control module outputs a shutdown control signal to the outdoor driving module through the first signal path, and the outdoor driving module drives the compressor to be shut down; the third timer restarts timing, the indoor control module judges whether the power supply voltage is greater than the recovery set voltage, when the power supply voltage is greater than the recovery set voltage and the timing parameter of the third timer is greater than the protection duration, if the ambient temperature in the vehicle meets the starting condition again, the indoor control module outputs a starting control signal to the outdoor driving module through the first signal path, and the outdoor driving module drives the compressor to start again;
when the timing parameter of the third timer reaches a third duration and the power supply voltage is smaller than a low-voltage cutoff set value, the indoor control module generates a shutdown signal; if the indoor control module receives a starting signal again, firstly, whether the power supply voltage is greater than the low-voltage cut-off set value is judged, if so, whether the power supply voltage is greater than the recovery voltage is judged, if the power supply voltage is greater than the recovery set voltage and the timing parameter of the third timer is greater than the protection duration, and if the ambient temperature in the vehicle meets the starting condition again, the indoor control module outputs a starting control signal to the outdoor driving module through a first signal path, and the outdoor driving module drives the compressor to start again; and if the power supply voltage is smaller than the low-voltage cutoff set value, the indoor control module generates a shutdown signal again.
2. The parking air conditioner voltage detection control method according to claim 1, characterized in that: further comprising the steps of:
the indoor control module samples a set temperature and calls at least one reference temperature;
the indoor control module calculates a sum of a set temperature and the reference temperature;
the indoor control module sets the sum as a lower threshold of a higher temperature gear interval of two continuous temperature gear intervals, and sets the sum as an upper threshold of a lower temperature gear interval of the two continuous temperature gear intervals.
3. The parking air conditioner voltage detection control method according to claim 2, characterized in that:
the indoor control module samples the set temperature and calls a first reference temperature;
the indoor control module calculates a sum of the set temperature and the first reference temperature;
the indoor control module sets the sum as a lower threshold of a first temperature gear interval and an upper threshold of a second temperature gear interval;
when the environment temperature in the vehicle belongs to the first temperature gear interval, the indoor control module outputs a first level signal to the outdoor driving module through a second signal path, and the outdoor driving module drives the compressor to work according to a first frequency; when the environment temperature in the vehicle belongs to a second temperature gear interval, the indoor control module outputs a second level signal to the outdoor driving module through a second signal path, and the outdoor driving module drives the compressor to work according to a second frequency; wherein the first frequency is higher than the second frequency.
4. The parking air conditioner voltage detection control method according to claim 3, characterized in that: further comprising the steps of:
the indoor control module samples a set temperature and calls a second reference temperature;
the indoor control module calculates a difference value between the set temperature and the second reference temperature;
and the indoor control module sets the difference value as a lower limit threshold value of the second temperature gear interval.
5. The parking air conditioner voltage detection control method according to claim 4, characterized by further comprising the steps of:
the indoor control module samples a set temperature and calls a third reference temperature;
the indoor control module calculates a difference value between the set temperature and the third reference temperature;
the indoor control module sets the difference value between the set temperature and the third reference temperature as the lower limit threshold of the starting condition, and sets the difference value between the set temperature and the third reference temperature as the upper limit threshold of the stopping condition;
the third reference temperature is less than or equal to the second reference temperature.
6. The parking air conditioner voltage detection control method according to claim 5, wherein if the ambient temperature in the vehicle meets the start condition, a first timer in the indoor control module is started, and when the timing parameter of the first timer reaches a first time length, the indoor control module outputs a start control signal to the outdoor driving module through a first signal path.
7. The parking air conditioner voltage detection control method according to claim 6, wherein if the power supply voltage is greater than a high voltage cut-off set value, a second timer in an indoor control module is started, and when a timing parameter of the second timer reaches a second time length, the indoor control module continuously outputs a plurality of times of high voltage alarm signals at intervals of the second time length and generates a shutdown signal.
8. A parking air conditioner characterized by employing the parking air conditioner voltage detection control method according to any one of claims 1 to 7.
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| CN201810476303.9A CN108638789B (en) | 2018-05-17 | 2018-05-17 | Parking air conditioner voltage detection control method and parking air conditioner |
| PCT/CN2019/086854 WO2019219006A1 (en) | 2018-05-17 | 2019-05-14 | Voltage detection control method for parking air conditioner and parking air conditioner |
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| CN201810476303.9A CN108638789B (en) | 2018-05-17 | 2018-05-17 | Parking air conditioner voltage detection control method and parking air conditioner |
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| CN108638789B (en) * | 2018-05-17 | 2021-01-29 | 青岛海尔空调器有限总公司 | Parking air conditioner voltage detection control method and parking air conditioner |
| CN109733162B (en) * | 2018-12-29 | 2021-10-29 | 青岛海尔空调器有限总公司 | Control method of parking air conditioner for vehicle |
| CN110758048B (en) * | 2019-02-12 | 2023-02-17 | 青岛海尔空调器有限总公司 | Control method of vehicle with parking air conditioner |
| CN110758049A (en) * | 2019-02-12 | 2020-02-07 | 青岛海尔空调器有限总公司 | Control method of vehicle with parking air conditioner |
| CN111609551B (en) * | 2019-02-25 | 2021-10-29 | 青岛经济技术开发区海尔热水器有限公司 | Heat pump system voltage self-adaptive control method and heat pump system |
| CN110341433B (en) * | 2019-07-30 | 2021-06-25 | 青岛海立电机有限公司 | Rapid heating control method of parking air conditioner |
| CN110696587B (en) * | 2019-09-24 | 2021-06-25 | 中国第一汽车股份有限公司 | Air conditioner control method and system and vehicle |
| CN111923691B (en) * | 2020-09-01 | 2022-05-06 | 海信（山东）空调有限公司 | Parking air conditioner control method and parking air conditioner |
| CN113320349B (en) * | 2021-05-13 | 2022-07-29 | Tcl空调器(中山)有限公司 | Air conditioner control method and device, electronic equipment and readable storage medium |
| CN113696694B (en) * | 2021-09-30 | 2023-03-28 | 东风商用车有限公司 | Automatic switching control method and system for driving air conditioner and parking air conditioner of commercial vehicle |
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| KR102203686B1 (en) * | 2014-12-10 | 2021-01-15 | 한온시스템 주식회사 | Air conditioner for vehicles and controlling method of the same |
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Effective date of registration: 20201231 Address after: 266101 Haier Industrial Park, 1 Haier Road, Laoshan District, Shandong, Qingdao Applicant after: QINGDAO HAIER AIR CONDITIONER GENERAL Corp.,Ltd. Applicant after: Haier Smart Home Co., Ltd. Address before: 266101 Haier Industrial Park, 1 Haier Road, Laoshan District, Shandong, Qingdao Applicant before: QINGDAO HAIER AIR CONDITIONER GENERAL Corp.,Ltd. |
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