Negative oxygen ion air conditioner and control method

Abstract

The application provides a control method for a negative oxygen ion air conditioner, which comprises detecting indoor air humidity, when the air humidity is within a preset range, a control device controls an air outlet direction to a personnel gathering area according to a detection result of a human sensing device, and a negative ion generating device is cyclically turned on and turned off according to a first period; when the air humidity is lower than a lower limit value of the preset range, the air humidity is increased by reducing an air outlet temperature and / or starting a humidifying device, and the negative ion generating device is kept in a continuously turned-on state; when the air humidity is higher than an upper limit value of the preset range, the negative ion generating device is cyclically turned on and turned off according to a second period, and enters a condensation control mode. The negative oxygen ion concentration is fully adjusted, so that the negative oxygen ion air conditioner has a good sterilization and purification effect, the user comfort is not affected by too high humidity, and when the indoor air humidity is high, the negative ion generating device is cyclically turned on and turned off, so that negative ion accumulation is avoided, and safety and comfort are fully ensured.

Description

Technical Field

[0001] This invention relates to the field of air conditioning control technology, and more specifically, to a negative ion air conditioner and its control method. Background Technology

[0002] Negative oxygen ions, as a major component of reactive oxygen species, carry a negative charge and are structurally similar to superoxide radicals. They exhibit strong redox properties and possess excellent air purification and sterilization functions. Therefore, an increasing number of air conditioners are equipped with negative oxygen ion generators. The concentration of negative oxygen ions is closely related to air humidity. When air humidity is low, the concentration of negative oxygen ions generated by the generator is low. As air humidity increases, the concentration of negative oxygen ions gradually increases, and the air purification and sterilization functions gradually improve. However, in actual use, excessively high air humidity can easily lead to condensation on the air conditioner, affecting its normal operation. Therefore, for negative oxygen ion air conditioners, how to coordinate the relationship between humidity, sterilization ability, and normal air conditioner operation to meet users' health and comfort needs is a problem that urgently needs to be solved in this field. Summary of the Invention

[0003] In view of this, the present invention aims to provide a negative oxygen ion air conditioner and control method to solve the above-mentioned problems existing in the prior art.

[0004] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0005] A control method for a negative ion air conditioner includes:

[0006] The system detects indoor air humidity. When the air humidity is within a preset range, the control device adjusts the airflow direction to the area where people gather based on the detection results of the human sense detection device. The negative ion generator cycles on and off according to the first cycle.

[0007] When the air humidity is below the lower limit of the preset range, the air humidity is increased by reducing the air outlet temperature and / or activating the humidifier, while the negative ion generator remains continuously on.

[0008] When the air humidity exceeds the upper limit of the preset range, the negative ion generator cycles on and off in the second cycle, entering an anti-condensation control mode. Through the combined control of air humidity and outlet air temperature, the concentration of negative oxygen ions can be effectively regulated to achieve a good sterilization and purification effect, while avoiding excessive humidity that could affect user comfort. This fully coordinates the relationship between temperature, humidity, and sterilization performance to meet users' health and comfort requirements. Furthermore, when indoor air humidity is high, the cyclical on / off operation of the negative ion generator prevents the accumulation of negative ions, ensuring safety and comfort.

[0009] Furthermore, the preset range is 40% to 85%. When the air humidity is between 40% and 85%, the concentration of negative oxygen ions can achieve good sterilization and purification effects, resulting in higher user comfort and less condensation on the air conditioner.

[0010] Furthermore, when the air humidity is within a preset range, the air outlet temperature is adjusted according to the preset temperature. When the air outlet temperature meets the first preset temperature requirement, the control device adjusts the air outlet direction to the area where people gather based on the detection results of the human presence detection device. This fully meets the user's health and comfort requirements and also provides a good sterilization and purification effect.

[0011] Further methods to reduce the outlet air temperature include reducing the indoor fan speed and increasing the compressor operating frequency.

[0012] Furthermore, when the outlet air temperature is lower than the first preset temperature and the outlet air humidity is still below 40%, the control device adjusts the outlet air direction to an unoccupied area while continuously monitoring the outlet air temperature and humidity. This indicates that lowering the outlet air temperature and activating the humidifier are insufficient to raise the indoor air humidity to the ideal level, requiring a further reduction in the outlet air temperature. However, further reducing the outlet air temperature would severely impact user comfort. Therefore, the control device adjusts the outlet air direction to an unoccupied area. At this point, continuing to lower the outlet air temperature not only increases air humidity but also avoids affecting user comfort.

[0013] Furthermore, when the air humidity is within a preset range, the outlet air temperature is adjusted to meet the first preset temperature requirement. When the outlet air temperature meets the first preset temperature and the air humidity is within the set range, the control device adjusts the outlet air direction to the area where people gather. The fact that the outlet air temperature meets the first preset temperature and the air humidity is within the set range indicates that lowering the outlet air temperature and activating the humidifier have effectively increased the indoor air humidity. At this time, the control device adjusts the outlet air direction to the area where people gather, and the air conditioner operates normally with its cooling and sterilization / purification functions.

[0014] Furthermore, the anti-condensation mode includes reducing the expansion valve opening and / or reducing the compressor frequency to reduce the refrigerant flow through the indoor heat exchanger, increasing the indoor heat exchanger temperature, and thus reducing the temperature difference between the indoor temperature and the indoor heat exchanger fins.

[0015] Furthermore, during the operation of the anti-condensation mode, the anti-condensation mode will be exited when the outlet air temperature exceeds the second preset temperature.

[0016] Compared with existing technologies, the control method for negative ion air conditioners described in this invention has the following advantages:

[0017] By combining the control of air humidity and air outlet temperature, the concentration of negative oxygen ions can be effectively regulated to achieve a good sterilization and purification effect, while avoiding excessive humidity that could affect user comfort. The relationship between temperature, humidity and sterilization performance is fully coordinated to meet the health and comfort requirements of users. Furthermore, when the indoor air humidity is high, the negative ion generator is turned on and off in a cyclical manner to prevent the accumulation of negative ions, thus fully ensuring safety and comfort.

[0018] The present invention also provides a negative ion air conditioner, including the control method for the negative ion air conditioner described above. The negative ion air conditioner includes a compressor, an indoor heat exchanger, an outdoor heat exchanger, and a refrigerant circulation pipeline. The refrigerant circulation pipeline connects the compressor, the indoor heat exchanger, and the outdoor heat exchanger. It also includes a negative ion generator, a humidifier, and a human presence detection device.

[0019] Furthermore, the negative oxygen ion generator is used to generate negative oxygen ions. The negative oxygen ion generator is installed in the air outlet duct of the air conditioner and is used to generate negative oxygen ions from the airflow blown out by the indoor fan. The humidification device is used to increase the humidity of the airflow. The humidification module is installed in the air outlet duct of the air conditioner and is used to humidify the airflow blown out by the indoor fan.

[0020] The negative ion air conditioner described above has the same advantages over the prior art as the control method used for negative ion air conditioners, and will not be repeated here. Attached Figure Description

[0021] Figure 1 This is a flowchart of the control method for a negative ion air conditioner according to an embodiment of the present invention;

[0022] Figure 2 This is a detailed flowchart of the control method for a negative ion air conditioner according to an embodiment of the present invention. Detailed Implementation

[0023] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0024] like Figures 1-2 As shown, a control method for a negative ion air conditioner includes the following steps:

[0025] S100. First, detect the indoor air humidity. When the air humidity H0 is within the preset range, the control device controls and adjusts the air outlet direction to the area where people gather based on the detection results of the human sense detection device.

[0026] Indoor humidity below 40% affects user comfort; therefore, it's necessary to appropriately increase indoor air humidity. As air humidity increases, the concentration of negative ions generated by the negative ion generator rises continuously. With this increase, the concentration of negative ions gradually increases, enhancing the air purification and sterilization functions. However, in actual use, when air humidity is too high (above 85%), condensation can easily occur in the air conditioner. Research has found that when air humidity is between 40% and 85%, the concentration of negative ions provides excellent sterilization and purification effects, resulting in higher user comfort and reducing the likelihood of condensation. Therefore, a preset range of 40% to 85% is set. When the air humidity is within this preset range, the air outlet temperature is adjusted according to the preset temperature. When the air outlet temperature meets the first preset temperature requirement, the control device adjusts the air outlet direction to the area where people gather based on the detection results of the human presence detection device, fully meeting the health and comfort requirements of users.

[0027] In this embodiment, the first preset temperature requirement is set according to the air conditioner's operating environment. It can be stored in the air conditioning system at the factory or set by the user with the assistance of after-sales personnel after installation.

[0028] Furthermore, when the air humidity is between 40% and 85%, the negative ion generator ionizes the water vapor in the air. When the air humidity is high, the negative ion generator produces a large number of ions, which can easily cause negative ions to accumulate. This can lead to the air conditioner's interior or localized areas in the room where the airflow is concentrated becoming electrified, affecting the stability of the air conditioner's operation and indoor safety, and even causing the internal motor of the air conditioner to burn out. Therefore, when the air humidity is high, the negative ion generator can be turned on and off in a cyclical manner to ensure that the negative ion content remains within a stable range for sterilization, purification, and safety.

[0029] In this embodiment, when the air humidity is between 40% and 85%, the negative ion generator cycles on and off according to the first cycle. During the first cycle, the on-time and off-time of the negative ion generator are maintained at an 8:2 ratio, ensuring intermittent operation and preventing excessively high negative ion concentrations inside the air conditioner.

[0030] S200: When the air humidity H0 is lower than the lower limit of the preset range, the air humidity is increased by reducing the outlet air temperature and / or activating the humidification device.

[0031] When the air humidity is below 40%, it not only affects the user's comfort, but also results in a low concentration of negative oxygen ions indoors, leading to poor sterilization and purification effects. It is necessary to increase the air humidity and increase the concentration of negative oxygen ions at the same time.

[0032] Research has shown that, under the same conditions, lower air temperature corresponds to higher humidity. Therefore, when the indoor heat exchanger operates as an evaporator and the air humidity is low, the humidity can be increased by lowering the outlet air temperature and / or activating a humidifier to bring the humidity level to a range conducive to the generation of negative oxygen ions. However, excessively low outlet air temperatures can affect the comfort of indoor users. Therefore, when increasing air humidity by lowering the outlet air temperature, the airflow direction needs to be further adjusted according to the outlet air temperature.

[0033] Furthermore, methods to reduce the outlet air temperature include: reducing the indoor fan speed and increasing the compressor operating frequency, with reducing the indoor fan speed taking precedence over increasing the compressor operating frequency. This also involves reducing the compressor load.

[0034] Specifically, when the outlet air temperature is lower than the first preset temperature and the outlet air humidity is still below 40%, the control device controls and adjusts the outlet air direction to the uninhabited area, while continuously monitoring the outlet air temperature and air humidity. When the air humidity is within the preset range, the outlet air temperature is adjusted to meet the first preset temperature requirement. When the outlet air temperature meets the first preset temperature and the air humidity is within the humidity range, the control device controls and adjusts the outlet air direction to the area where people gather.

[0035] Furthermore, when the air humidity is below 40%, the negative ion generator remains continuously on. Due to the low air humidity, the concentration of negative ions generated by the negative ion generator will not be too high, and it is not easy for negative ions to accumulate.

[0036] S300: When the air humidity H0 is higher than the upper limit of the preset range, the anti-condensation control mode is entered.

[0037] When the air humidity is above 85%, the number of ions produced by the negative ion generator increases dramatically, easily leading to negative ion accumulation. Therefore, it is necessary to periodically turn off the negative ion generator to avoid this accumulation. Furthermore, when the air humidity is above 85%, the negative ion generator cycles on and off according to a second cycle. During this second cycle, the on / off time of the negative ion generator is maintained at a 4:6 ratio. Compared to conditions where the air humidity is below 85%, this reduces the on-time of the negative ion generator, effectively preventing negative ion accumulation.

[0038] Furthermore, in this embodiment, when the air humidity is higher than 85%, condensation may occur in the air conditioner, so it is necessary to first execute the anti-condensation mode. The anti-condensation mode includes reducing the opening of the expansion valve and / or reducing the compressor frequency to reduce the flow of refrigerant through the indoor heat exchanger, increase the temperature of the indoor heat exchanger, and thus reduce the temperature difference between the indoor temperature and the fins of the indoor heat exchanger.

[0039] During anti-condensation mode operation, the mode will exit when the outlet air temperature is too high. Specifically, when the outlet air temperature is high, the air conditioner is less likely to produce condensation, and the high outlet air temperature can easily affect the comfort of indoor users. Therefore, the anti-condensation mode needs to be exited to prioritize the comfort of indoor users. Preferably, when the outlet air temperature exceeds a second preset temperature, the control device will exit the anti-condensation mode.

[0040] In this embodiment, the second preset temperature is greater than the first preset temperature.

[0041] Furthermore, during the anti-condensation mode operation and after reducing the expansion valve opening, the indoor temperature and the indoor heat exchanger fin temperature are continuously monitored, and the difference between the two is calculated. If the difference between the indoor temperature and the indoor heat exchanger fin temperature is greater than the preset difference, the refrigerant flow is reduced by lowering the compressor frequency. If the difference between the indoor temperature and the indoor heat exchanger fin temperature is less than the preset difference, the current mode continues to operate.

[0042] In this embodiment, through a series of control methods, the concentration of negative oxygen ions can be fully adjusted to achieve a good sterilization and purification effect, while avoiding excessive humidity that would affect user comfort. The relationship between temperature, humidity and sterilization performance is fully coordinated to meet the health and comfort requirements of users.

[0043] As part of an embodiment of the present invention, the control method for a negative ion air conditioner specifically includes the following steps:

[0044] S101. Detect the indoor air humidity H0 and determine whether the air humidity H0 is within the preset range. If yes, proceed to step S102; otherwise, proceed to step S200 or S300.

[0045] S102. If the air humidity H0 is within the preset range, detect the outlet air temperature and determine whether the outlet air temperature meets the first preset temperature requirement. If yes, execute step S104, where the human detection device detects the location of people in the room and controls the outlet air direction to adjust to the area where people gather. If no, execute step S103, where the human detection device detects the location of people in the room and controls the outlet air direction to adjust to the uninhabited area, and continuously detects the outlet air temperature.

[0046] S103, The human detection device detects the location of people in the room and controls the airflow direction to adjust to an uninhabited area.

[0047] S104. The human detection device detects the location of people in the room and controls the airflow direction to adjust to the area where people gather.

[0048] S201. When the air humidity H0 < 40%, reduce the outlet air temperature and start the humidifier at the same time. The human detection device detects the position of people in the room.

[0049] S202, Determine the outlet air temperature T 出 Whether the first preset temperature T1 requirement is met, and at the same time continuously monitor the air humidity; specifically, the air outlet temperature meeting the first preset temperature T1 means that the air outlet temperature is greater than or equal to the preset temperature.

[0050] S203a, When the outlet air temperature does not meet the first preset temperature requirement, i.e., T 出 When the air temperature is less than T1 and the air humidity H0 is still less than 40%, the control device adjusts the air outlet direction to an uninhabited area. Specifically, if the air outlet temperature does not meet the first preset temperature requirement and the air humidity is less than 40%, it indicates that lowering the air outlet temperature and starting the humidifier are insufficient to raise the indoor air humidity to the ideal level. The air outlet temperature needs to be further lowered, but further lowering the air outlet temperature will seriously affect user comfort. Therefore, the control device adjusts the air outlet direction to an uninhabited area. At this time, continuing to lower the air outlet temperature can not only increase the air humidity, but also avoid affecting user comfort.

[0051] S203b When the outlet air temperature meets the first preset temperature requirement, but the air humidity H0 is still less than 40%, it means that the current outlet air temperature will not affect the user's comfort, but the humidifier still needs to continue to humidify. The control device controls the outlet air direction to be uniformly moving and sweeping, so that the humid air generated by the humidifier is evenly blown into the room to increase the indoor humidity.

[0052] S203c When the outlet air temperature meets the first preset temperature requirement and the air humidity H0 is greater than 40%, it indicates that lowering the outlet air temperature and starting the humidifier have effectively increased the indoor air humidity. At this time, the control device controls and adjusts the outlet air direction to the area where people gather, and the air conditioner operates normally in the cooling and sterilization purification functions.

[0053] Furthermore, after adjusting the air outlet direction to an uninhabited area, the system continuously monitors the outlet air temperature and indoor humidity. When the indoor air humidity exceeds 40% and remains above that level for a duration greater than the preset time t0, the control device adjusts the air outlet direction to an area with a high concentration of people, slowly increasing the outlet air temperature. The preset time t0 ensures that the indoor air humidity remains stable above 40%, preventing the air humidity from dropping below 40% as soon as the outlet air temperature rises slightly.

[0054] Furthermore, ways to increase the outlet air temperature include increasing the indoor fan speed and reducing the compressor operating frequency, with reducing the compressor operating frequency taking precedence over increasing the outlet air temperature.

[0055] In this embodiment, the anti-condensation control mode includes:

[0056] S301 When the air humidity H0 is higher than 85%, enter the anti-condensation control mode and execute step S302.

[0057] Condensation is caused by high air humidity and low indoor heat exchanger fin temperature. Therefore, it is necessary to reduce air humidity and / or increase indoor heat exchanger fin temperature.

[0058] S302. Reduce the opening of the expansion valve and continuously monitor the difference between the indoor temperature and the indoor heat exchanger fin temperature. If the difference between the indoor temperature and the indoor heat exchanger fin temperature is greater than the preset difference, proceed to step S303. If the difference between the indoor temperature and the indoor heat exchanger fin temperature is less than the preset difference, proceed to step S304.

[0059] Reducing the opening of the expansion valve lowers the fin temperature of the indoor heat exchanger, thereby increasing the outlet air temperature, reducing air humidity, and preventing condensation. Preferably, the opening of the expansion valve is gradually reduced at a rate of one step per minute.

[0060] S303. Reduce the compressor frequency to decrease the refrigerant flow to the indoor heat exchanger, thereby increasing the evaporator temperature.

[0061] When the difference between the indoor temperature and the evaporator temperature exceeds the preset difference, it indicates that reducing the expansion valve opening is not significantly reducing the evaporator temperature, and the evaporator temperature remains low, requiring further increase. Methods to increase the evaporator temperature include increasing the indoor fan speed and reducing the compressor operating frequency. To effectively prevent condensation, reducing the compressor operating frequency quickly raises the evaporator temperature.

[0062] S304. Continue operating in the current mode. When the difference between the indoor temperature and the indoor heat exchanger fin temperature is less than the preset difference, it means that reducing the opening of the expansion valve can effectively increase the evaporator temperature. At this time, operating at the current opening can achieve a good anti-condensation effect, while slowly increasing the evaporator temperature and gradually reducing the air humidity.

[0063] S305. While reducing the opening of the expansion valve and decreasing the compressor frequency, continuously monitor the outlet air temperature. When the outlet air temperature is greater than the second preset temperature, exit the anti-condensation mode.

[0064] In this embodiment, air humidity is continuously monitored throughout the control adjustment process, and different control modes are executed based on the detected air humidity.

[0065] As one embodiment of the present invention, a negative ion air conditioner is also provided. The air conditioner is capable of using the control method for negative ion air conditioners described above. The negative ion air conditioner includes a compressor, an indoor heat exchanger, an outdoor heat exchanger, and a refrigerant circulation pipeline. The refrigerant circulation pipeline connects the compressor, the indoor heat exchanger, and the outdoor heat exchanger. It also includes a negative ion generator, a humidifier, and a human presence detection device. The negative ion generator is used to generate negative ions and is installed in the air outlet duct of the air conditioner to generate negative ions from the airflow blown out by the indoor fan. The humidifier is used to increase the humidity of the outlet air and is installed in the air outlet duct of the air conditioner to humidify the airflow blown out by the indoor fan.

[0066] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A control method for a negative oxygen ion air conditioner, characterized by, include: The indoor air humidity is detected. When the air humidity is within a preset range, the control device adjusts the air outlet direction to the area where people gather based on the detection results of the human sense detection device. The negative ion generator turns on and off in a first cycle. The preset range is 40%~85%, and the ratio of the on-time to the off-time of the negative ion generator is 8:2 in the first cycle. When the air humidity is below the lower limit of the preset range of 40%, the air humidity is increased by reducing the outlet air temperature and / or activating the humidifier, while the negative ion generator remains continuously on. When the air humidity is higher than the upper limit of the preset range (85%), the negative ion generator will turn on and off in the second cycle and enter the anti-condensation control mode. During the second cycle, the on-time and off-time of the negative ion generator will be 4:

6. When the air outlet temperature is higher than the second preset temperature during the operation of the anti-condensation mode, the anti-condensation mode will be exited. When the air humidity is within a preset range, the air outlet temperature is adjusted according to the preset temperature. When the air outlet temperature meets the first preset temperature requirement, the control device adjusts the air outlet direction to the area where people gather based on the detection results of the human detection device. When the air outlet temperature is lower than the first preset temperature and the air outlet humidity is still below 40%, the control device adjusts the air outlet direction to the uninhabited area, while continuously monitoring the air outlet temperature and air humidity. The second preset temperature is greater than the first preset temperature.

2. The control method for negative ion air conditioning according to claim 1, characterized in that, Ways to reduce the outlet air temperature include: reducing the indoor fan speed and increasing the compressor operating frequency.

3. The control method for negative ion air conditioning according to claim 1 or 2, characterized in that, When the air humidity is within the preset range, the air outlet temperature is adjusted to meet the first preset temperature requirement. When the air outlet temperature meets the first preset temperature and the air humidity is within the humidity range, the control device controls the air outlet direction to be adjusted to the area where people gather.

4. The control method for negative ion air conditioning according to claim 1, characterized in that, The anti-condensation mode includes reducing the opening of the expansion valve and / or reducing the compressor frequency to reduce the flow of refrigerant through the indoor heat exchanger, thereby increasing the temperature of the indoor heat exchanger and thus reducing the temperature difference between the indoor temperature and the fins of the indoor heat exchanger.

5. A negative ion air conditioner, characterized in that, Using the control method described in any one of claims 1 to 4, the negative ion air conditioner includes a compressor, an indoor heat exchanger, an outdoor heat exchanger, and a refrigerant circulation pipeline, wherein the refrigerant circulation pipeline connects the compressor, the indoor heat exchanger, and the outdoor heat exchanger, and further includes a negative ion generator, a humidifier, and a human presence detection device.

6. The negative ion air conditioner according to claim 5, characterized in that, The negative oxygen ion generator is used to generate negative oxygen ions. The negative oxygen ion generator is installed in the air outlet duct of the air conditioner and is used to generate negative oxygen ions from the airflow blown out by the indoor fan. The humidification device is used to increase the humidity of the airflow. The humidification module is installed in the air outlet duct of the air conditioner and is used to humidify the airflow blown out by the indoor fan.

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