Indoor temperature control method and device for air conditioner and air conditioning system

Abstract

The invention provides an indoor temperature control method and device for an air conditioner and an air conditioning system. The indoor temperature control method comprises the steps that it is determined that the air conditioner system is started, and the preset target indoor temperature of the air conditioner system and the current suction pressure and the current working frequency of a compressor are obtained; according to the current working frequency, the target indoor temperature and the calculation relational expression, target suction pressure is obtained through calculation; and according to the target suction pressure and the current suction pressure, the working frequency of the compressor is controlled and adjusted. According to the indoor temperature control method and device for the air conditioner and the air conditioning system, the correlation between the outdoor unit sensor signal and the indoor temperature is analyzed, and accurate control over the indoor temperature can be achieved under the condition that no communication line exists.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical appliances, and in particular to an indoor temperature control method, a control device and an air conditioning system for an air conditioner. Background Art

[0002] The connection between the indoor and outdoor units of a traditional air conditioner typically involves piping for refrigerant flow, circuitry for powering electrical devices, and communication lines for controlling the indoor unit's operating status. When controlling the indoor temperature, if the communication line is connected, the indoor unit monitors the current indoor temperature and transmits this feedback to the outdoor unit's computer board. This control adjusts the compressor's operating frequency to maintain stable operation, thereby maintaining the indoor temperature within the user's set temperature.

[0003] However, if there is no communication line between the indoor and outdoor units, the temperature sensor signal of the indoor unit cannot be transmitted to the outdoor unit. The indoor unit can only judge the transmitted electrical signal and control the power on or off, but cannot accurately control the indoor temperature, making indoor temperature control more difficult. Summary of the Invention

[0004] The present invention provides an indoor temperature control method, a control device and an air-conditioning system for an air conditioner, so as to solve the defects existing in the prior art and achieve the following technical effects: the present invention realizes precise control of the indoor temperature even without a communication line by analyzing the correlation between the outdoor unit sensor signal and the indoor temperature.

[0005] According to a first embodiment of the present invention, a method for controlling indoor temperature of an air conditioner includes:

[0006] Determining that the air conditioning system is turned on, obtaining a preset target indoor temperature of the air conditioning system, and a current suction pressure and a current operating frequency of the compressor;

[0007] Calculating a target suction pressure according to the current operating frequency, the target indoor temperature, and the calculation relationship;

[0008] The operating frequency of the compressor is controlled and adjusted according to the target suction pressure and the current suction pressure.

[0009] According to one embodiment of the present invention, the step of controlling and adjusting the operating frequency of the compressor according to the target suction pressure and the current suction pressure specifically includes:

[0010] Calculating the product of the difference between the target inhalation pressure and the current inhalation pressure and the correction coefficient to obtain a comparison difference;

[0011] The operating frequency of the compressor is controlled and adjusted according to the interval in which the comparison difference value is located.

[0012] According to one embodiment of the present invention, the step of controlling and adjusting the operating frequency of the compressor according to the interval in which the comparison difference value is located specifically includes:

[0013] If the comparison difference is greater than a first set difference, the compressor is controlled to perform a frequency reduction operation; or if the comparison difference is less than a second set difference, the compressor is controlled to perform a frequency increase operation;

[0014] The first set difference is greater than zero, and the second set difference is less than zero.

[0015] According to one embodiment of the present invention, the step of controlling the compressor to perform a frequency reduction operation based on the comparison difference being greater than a first set difference specifically includes:

[0016] According to the comparison difference being in the first difference range, controlling the compressor to reduce a first frequency drop value based on the current operating frequency;

[0017] Alternatively, according to the comparison difference being in the second difference range, controlling the compressor to reduce a second frequency drop value based on the current operating frequency;

[0018] Alternatively, according to the comparison difference being in the third difference range, controlling the compressor to reduce a third frequency drop value based on the current operating frequency;

[0019] Among them, the first difference interval is greater than the first set difference, the second difference interval is greater than the first difference interval, the third difference interval is greater than the second difference interval, and the first frequency drop value is less than the second frequency drop value, and the second frequency drop value is less than the third frequency drop value.

[0020] According to one embodiment of the present invention, the step of controlling the compressor to perform a frequency reduction operation based on the comparison difference being less than a second set difference specifically includes:

[0021] According to the comparison difference being in a fourth difference interval, controlling the compressor to increase a first frequency value based on a current operating frequency;

[0022] Alternatively, according to the comparison difference being in the fifth difference range, controlling the compressor to increase the second frequency increment based on the current operating frequency;

[0023] Alternatively, according to the comparison difference being in the sixth difference range, the compressor is controlled to increase the third frequency increment based on the current operating frequency;

[0024] Among them, the fourth difference interval is smaller than the second set difference, the fifth difference interval is smaller than the fourth difference interval, the sixth difference interval is smaller than the fifth difference interval, and the first frequency appreciation is smaller than the second frequency appreciation, and the second frequency appreciation is smaller than the third frequency appreciation.

[0025] According to one embodiment of the present invention, the correction value is 10.

[0026] According to one embodiment of the present invention, the step of determining that the air conditioning system is turned on and obtaining a preset target indoor temperature of the air conditioning system, and a current suction pressure and a current operating frequency of the compressor specifically includes:

[0027] After the compressor of the air-conditioning system is turned on, the current operating stage of the air-conditioning system is determined based on the continuous operation time of the compressor, and the target indoor temperature corresponding to the current operating stage, as well as the current suction pressure and current operating frequency of the compressor are obtained.

[0028] According to one embodiment of the present invention, the step of calculating the target suction pressure according to the current operating frequency, the target indoor temperature, and the calculation relationship specifically includes:

[0029] The target suction pressure in the current operating stage is calculated according to the current operating frequency, the target indoor temperature and the calculation relationship in the current operating stage.

[0030] According to one embodiment of the present invention, the control method further includes:

[0031] An initial operating frequency of a compressor of the air-conditioning system when it is started is determined according to the number of pre-starts of the air-conditioning system.

[0032] According to one embodiment of the present invention, the step of determining the initial operating frequency of the compressor of the air-conditioning system at startup based on the number of pre-starts of the air-conditioning system specifically includes:

[0033] According to the number of pre-starts being zero, the initial operating frequency is the maximum allowable frequency of the compressor under the current outdoor ambient temperature;

[0034] Alternatively, if the number of previous startups is greater than zero, the initial operating frequency is the startup operating frequency or the shutdown operating frequency during the last startup.

[0035] According to an embodiment of the second aspect of the present invention, an indoor temperature control device for an air conditioner is configured to execute the indoor temperature control method for an air conditioner as described in the embodiment of the first aspect of the present invention, and the indoor temperature control device at least includes:

[0036] A first acquisition module is used to determine whether the air-conditioning system is turned on, and obtain a preset target indoor temperature of the air-conditioning system, and a current suction pressure and a current operating frequency of the compressor;

[0037] a second acquisition module, configured to calculate a target suction pressure according to the current operating frequency, the target indoor temperature, and the calculation formula;

[0038] The control module is configured to control and adjust the operating frequency of the compressor according to the target suction pressure and the current suction pressure.

[0039] An air conditioning system according to a third embodiment of the present invention includes:

[0040] Indoor and outdoor units;

[0041] As described in the embodiment of the second aspect of the present invention, the indoor temperature control device for an air conditioner is connected to the indoor unit and the outdoor unit respectively.

[0042] In summary, the control method proposed in the present invention has at least the following advantages over the prior art:

[0043] (1) No communication lines required: In traditional air conditioning systems, communication lines are required between the indoor and outdoor units to transmit control signals to achieve temperature control. This invention achieves precise control of indoor temperature without communication lines by analyzing the correlation between the outdoor unit sensor signal and the indoor temperature. This reduces installation costs, simplifies system wiring, and improves system reliability.

[0044] (2) Cost savings: Since no additional communication lines are required, the present invention can significantly reduce the manufacturing and installation costs of air conditioning systems. This cost savings is particularly important for companies that mass-produce and install air conditioning systems.

[0045] (3) Easy installation: Since the installation of communication lines is eliminated, the installation process of the air conditioning system becomes simpler and faster. This not only reduces the installation time, but also reduces the possibility of errors and failures during the installation process.

[0046] (4) Improved system reliability: Communication lines may be interrupted due to aging, damage, or external factors (such as animal bites, environmental erosion, etc.). By using the sensor signal from the outdoor unit to control the indoor temperature, the present invention reduces the reliance on communication lines, thereby improving the reliability of the entire system.

[0047] (5) Environmental adaptability: In certain environmental conditions, such as extreme weather or special locations, communication lines may be difficult to install or maintain. The present invention provides a solution that does not rely on communication lines, enabling the air conditioning system to operate stably in a wider range of environments.

[0048] (6) User comfort: Despite the removal of communication lines, the present invention can still accurately control the indoor temperature according to the target temperature set by the user, ensuring that the user's comfort is not affected. This is achieved by real-time monitoring and adjustment of the compressor's operating frequency. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0050] Figure 1 Schematic diagram of the steps of the indoor temperature control method for air conditioning provided by the present invention;

[0051] Figure 2 This is a statistical relationship diagram of suction pressure, indoor temperature and compressor frequency provided by the present invention;

[0052] Figure 3 1 is a schematic structural diagram of an indoor temperature control device for an air conditioner provided by the present invention;

[0053] Figure 4 It is a structural schematic diagram of the air-conditioning system provided by the present invention;

[0054] Figure 5 It is a structural schematic diagram of the electronic device provided by the present invention.

[0055] Reference numerals:

[0056] 1. Indoor unit; 2. Outdoor unit; 3. Control device; 110. First acquisition module; 120. Second acquisition module; 130. Control module. DETAILED DESCRIPTION

[0057] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0058] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0059] The following describes an indoor temperature control method, a control device and an air conditioning system for air conditioning provided by the present invention with reference to the accompanying drawings.

[0060] First of all, it should be pointed out that before describing the control method of the present invention, the structural basis of the air-conditioning system on which the control method is based is first described: Figure 4 As shown, the air conditioning system includes an indoor unit 1, an outdoor unit 2, and a control device 3. The indoor unit 1 and the outdoor unit 2 are connected via a power line, and no communication line is provided between the indoor and outdoor units. The control device 3 is connected to the outdoor unit 2 and the indoor unit 1, respectively. The control device 3 pre-stores a calculation relationship between the suction pressure, the indoor temperature, and the operating frequency of the compressor. The control device 3 of the present invention can also realize independent control of the indoor and outdoor units even when there is no communication line between the indoor and outdoor units.

[0061] like Figure 1 As shown, the indoor temperature control method for air conditioning according to the first embodiment of the present invention includes:

[0062] Step S1, determining that the air conditioning system is turned on, obtaining the preset target indoor temperature of the air conditioning system, and the current suction pressure and current operating frequency of the compressor;

[0063] Step S2, calculating the target suction pressure based on the current operating frequency, the target indoor temperature and a calculation formula;

[0064] Step S3: Control and adjust the operating frequency of the compressor according to the target suction pressure and the current suction pressure.

[0065] It should be noted that there is no communication line connecting the indoor unit 1 and the outdoor unit 2. That is, this application is directed to an air conditioning system in which there is no communication line connecting the indoor unit 1 and the outdoor unit 2. In the absence of a communication line between the indoor and outdoor units, the temperature sensor signal of the indoor unit 1 cannot be transmitted to the outdoor unit 2. The indoor unit 1 can only detect the transmitted electrical signal and control the power on or off, but cannot accurately control the indoor temperature, making indoor temperature control more difficult.

[0066] The present invention aims to find the sensor signal of outdoor unit 2 associated with the indoor temperature change under such circumstances, reflect the indoor temperature through the change of this signal, and adjust the compressor frequency to achieve the purpose of controlling the indoor temperature change, thereby solving the problem of controlling the temperature of indoor unit 1 without a communication line between the indoor and outdoor units.

[0067] Specifically, the indoor temperature control method according to an embodiment of the present invention operates as follows: Through experiments and data analysis, researchers discovered that the compressor's suction pressure (gauge pressure) has a unique corresponding value under different indoor temperatures and compressor operating frequencies. Based on this data, the researchers established a calculation formula that describes the relationship between suction pressure (ps), indoor temperature (Tair), and compressor frequency (f): ps = f(Tair, f).

[0068] like Figure 2 As shown, Figure 2 The statistical relationship diagram of suction pressure, indoor temperature and compressor frequency can reflect the correlation between the three parameters. The researchers conducted multiple experiments and summarized the data to obtain the above calculation formula ps = f(Tair, f).

[0069] When the user sets a target indoor temperature (Tairset), the control device 3 uses the above relationship to calculate the target suction pressure (Pset) that the compressor should reach at that target temperature. It will be understood that the above target suction pressure is the ideal suction pressure that the compressor needs to reach in order to achieve the user-set indoor temperature.

[0070] The control device 3 then calculates the difference between the target suction pressure (Pset) and the current suction pressure (ps) (ΔP = Pset - ps), and adjusts the operating frequency of the compressor according to the difference ΔP. The above difference reflects the deviation between the current system state and the ideal state.

[0071] For example, if ΔP is greater than a positive threshold, indicating that the indoor temperature is too high, the compressor frequency needs to be reduced to reduce cooling capacity; if ΔP is less than a negative threshold, indicating that the indoor temperature is too low, the compressor frequency needs to be increased to increase cooling capacity. This adjustment is achieved by looking up a table that defines the frequency change corresponding to different ΔP ranges.

[0072] Furthermore, based on the above basic working principle, the specific working process of the indoor temperature control method of the present invention is as follows:

[0073] First, when the air conditioning system is turned on, the control device 3 first determines that the air conditioning system has been started and obtains the target indoor temperature set by the user. Simultaneously, the control device 3 obtains the current suction pressure and current operating frequency of the compressor through connected sensors. It should be noted that the control device 3 has a pre-stored calculation formula that describes the mathematical relationship between suction pressure, indoor temperature, and compressor operating frequency. This formula, derived through experiments and data analysis, ensures a unique corresponding suction pressure value under different indoor temperatures and compressor frequencies.

[0074] Subsequently, the control device 3 uses the current operating frequency and target indoor temperature, combined with a pre-stored calculation formula, to calculate the target suction pressure that should be achieved under the current conditions. This target suction pressure is intended to allow the indoor temperature to reach the target temperature set by the user.

[0075] The control device 3 then compares the calculated target suction pressure with the actual measured current suction pressure. If there is a difference between the two (i.e., the difference ΔP), the control device 3 adjusts the compressor operating frequency based on this difference. If the target suction pressure is higher than the current suction pressure (ΔP>0.8), the compressor frequency is reduced; if the target suction pressure is lower than the current suction pressure (ΔP<-0.8), the compressor frequency is increased.

[0076] During operation, the control device 3 continuously monitors the suction pressure and adjusts the compressor frequency based on real-time data to ensure that the indoor temperature remains stable near the target temperature set by the user. This process is dynamic, meaning that the control device 3 continuously calculates and adjusts to adapt to changes in the indoor and outdoor environments.

[0077] Finally, when the air conditioning system is shut down, the control device 3 will record the operating frequency of the compressor at the time of shutdown, so that the starting frequency of the compressor can be adjusted according to this information when the system is turned on next time.

[0078] In summary, the indoor temperature control method for air conditioning proposed in the present invention has at least the following advantages over the prior art:

[0079] (1) No communication lines required: In traditional air conditioning systems, communication lines are required between the indoor and outdoor units to transmit control signals to achieve temperature control. By analyzing the correlation between the outdoor unit 2 sensor signal and the indoor temperature, the present invention can achieve precise control of the indoor temperature without communication lines. This reduces installation costs, simplifies system wiring, and improves system reliability.

[0080] (2) Cost savings: Since no additional communication lines are required, the present invention can significantly reduce the manufacturing and installation costs of air conditioning systems. This cost savings is particularly important for companies that mass-produce and install air conditioning systems.

[0081] (3) Easy installation: Since the installation of communication lines is eliminated, the installation process of the air conditioning system becomes simpler and faster. This not only reduces the installation time, but also reduces the possibility of errors and failures during the installation process.

[0082] (4) Improved system reliability: Communication lines may be interrupted due to aging, damage, or external factors (such as animal bites, environmental erosion, etc.). By using the sensor signal of the outdoor unit 2 to control the indoor temperature, the present invention reduces the dependence on the communication line, thereby improving the reliability of the entire system.

[0083] (5) Environmental adaptability: In certain environmental conditions, such as extreme weather or special locations, communication lines may be difficult to install or maintain. The present invention provides a solution that does not rely on communication lines, enabling the air conditioning system to operate stably in a wider range of environments.

[0084] (6) User comfort: Despite the removal of communication lines, the present invention can still accurately control the indoor temperature according to the target temperature set by the user, ensuring that the user's comfort is not affected. This is achieved by real-time monitoring and adjustment of the compressor's operating frequency.

[0085] According to some embodiments of the present invention, the step of controlling and adjusting the operating frequency of the compressor according to the target suction pressure and the current suction pressure specifically includes:

[0086] Calculate the product of the difference between the target inhalation pressure and the current inhalation pressure and the correction coefficient to obtain a comparison difference;

[0087] The operating frequency of the compressor is controlled and adjusted according to the interval in which the comparison difference lies.

[0088] In this embodiment, the control device 3 first calculates the difference (ΔP) between the target inhalation pressure (Pset) and the current inhalation pressure (ps). It can be understood that this difference represents the deviation between the actual inhalation pressure and the ideal target pressure.

[0089] To fine-tune the compressor's operating frequency, control device 3 multiplies the difference ΔP by a pre-set correction factor to produce a comparison difference. This correction factor may be adjusted based on specific system parameters, historical data, or environmental conditions to optimize the control process. For example, the correction factor may be set to 10, though other values ​​are also possible.

[0090] The control device 3 determines how to adjust the operating frequency of the compressor based on the interval that the comparison difference is in. This interval may be divided based on experimental data and system characteristics to ensure that the adjustment of the compressor frequency can quickly respond to temperature changes while maintaining system stability.

[0091] Based on the range of the comparison difference, the control device 3 will take appropriate measures to adjust the compressor operating frequency. For example, if the comparison difference indicates that the indoor temperature is too high, the control device 3 may reduce the compressor frequency to reduce the cooling capacity; conversely, if the comparison difference indicates that the indoor temperature is too low, the control device 3 may increase the compressor frequency to increase the cooling capacity.

[0092] After a single adjustment is completed, the control device 3 will continue to monitor the suction pressure and indoor temperature and dynamically adjust the compressor operating frequency based on real-time data. This process is repeated to ensure that the indoor temperature can be stably maintained near the target temperature set by the user.

[0093] In this way, through this control strategy based on the difference and the correction coefficient, the air-conditioning system of this embodiment can effectively adjust the operating frequency of the compressor without a communication line, thereby achieving precise control of the indoor temperature.

[0094] Furthermore, the step of controlling and adjusting the operating frequency of the compressor according to the interval in which the comparison difference value is located specifically includes:

[0095] If the comparison difference is greater than the first set difference, the compressor is controlled to perform a frequency reduction operation; or if the comparison difference is less than the second set difference, the compressor is controlled to perform a frequency increase operation.

[0096] The first set difference is greater than zero, and the second set difference is less than zero.

[0097] In this embodiment, the control device 3 presets two key difference thresholds: a first set difference (usually greater than zero) and a second set difference (usually less than zero). These thresholds are used to determine the temperature deviation indicated by the current comparison difference (the difference between the target inlet pressure and the current inlet pressure multiplied by the correction factor). For example, the first set difference is 0.8, and the second set difference is -0.8.

[0098] If the comparison difference is greater than the first set difference, this indicates that the current suction pressure is lower than the target suction pressure, meaning that the indoor temperature may be higher than the target temperature set by the user. To lower the indoor temperature, the control device 3 controls the compressor to perform a frequency reduction operation, that is, to reduce the operating frequency of the compressor, thereby reducing the cooling capacity and lowering the indoor temperature.

[0099] Conversely, if the comparison difference is less than the second set difference, this indicates that the current suction pressure is higher than the target suction pressure, meaning that the indoor temperature may be lower than the target temperature set by the user. To increase the indoor temperature, the control device 3 controls the compressor to perform a frequency increase operation, that is, to increase the operating frequency of the compressor, thereby increasing the cooling capacity and raising the indoor temperature.

[0100] Afterwards, the control device 3 continuously monitors the comparison difference and dynamically adjusts the compressor operating frequency based on its relationship with the set threshold. This feedback-based control strategy ensures that the air conditioning system can quickly respond to changes in indoor temperature and maintain the indoor temperature within the target range set by the user.

[0101] Thus, through the control logic based on preset thresholds, the present invention can effectively and precisely control indoor temperature without communication lines, improving the energy efficiency of the air conditioning system and user comfort. This approach also simplifies the control strategy, making the system more stable and reliable.

[0102] In some specific embodiments of the present invention, the step of controlling the compressor to perform a frequency reduction operation according to the comparison difference being greater than the first set difference specifically includes:

[0103] According to the comparison difference being in the first difference interval, controlling the compressor to reduce the first frequency reduction value based on the current operating frequency;

[0104] Alternatively, according to the comparison difference being in the second difference range, the compressor is controlled to reduce the second frequency drop value based on the current operating frequency;

[0105] Alternatively, according to the comparison difference being in the third difference range, the compressor is controlled to reduce the third frequency drop value based on the current operating frequency;

[0106] Among them, the first difference interval is greater than the first set difference, the second difference interval is greater than the first difference interval, the third difference interval is greater than the second difference interval, and the first frequency drop value is less than the second frequency drop value, and the second frequency drop value is less than the third frequency drop value.

[0107] For example, the first set difference is a and the correction coefficient is 10. When the comparison difference ΔP=10*(Pset-ps) is greater than a and less than or equal to a+2b, the first frequency is reduced to 2; when the comparison difference ΔP=10*(Pset-ps) is greater than a+2b and less than or equal to a+3b, the second frequency is reduced to 4; when the comparison difference ΔP=10*(Pset-ps) is greater than a+3b and less than or equal to a+4b, the third frequency is reduced to 6; when the comparison difference ΔP=10*(Pset-ps) is greater than a+4b and less than or equal to a+5b, the fourth frequency is reduced to 8; when the comparison difference ΔP=10*(Pset-ps) is greater than a+5b, the fifth frequency is reduced to 10.

[0108] In some other specific embodiments of the present invention, the step of controlling the compressor to perform a frequency reduction operation according to the comparison difference being less than the second set difference specifically includes:

[0109] According to the comparison difference being in the fourth difference interval, controlling the compressor to increase the first frequency value based on the current operating frequency;

[0110] Alternatively, according to the comparison difference being in the fifth difference range, the compressor is controlled to increase the second frequency increment based on the current operating frequency;

[0111] Alternatively, according to the comparison difference being in the sixth difference range, the compressor is controlled to increase the third frequency increment based on the current operating frequency;

[0112] Among them, the fourth difference interval is smaller than the second set difference, the fifth difference interval is smaller than the fourth difference interval, the sixth difference interval is smaller than the fifth difference interval, and the first frequency appreciation is smaller than the second frequency appreciation, and the second frequency appreciation is smaller than the third frequency appreciation.

[0113] For example, the second set difference is c and the correction coefficient is 10. When the comparison difference ΔP = 10*(Pset-ps) is less than c and greater than or equal to c+d, the first frequency is increased to 1; when the comparison difference ΔP = 10*(Pset-ps) is less than c+d and greater than or equal to c+2d, the second frequency is increased to 2; when the comparison difference ΔP = 10*(Pset-ps) is less than c+2d and greater than or equal to c+3d, the third frequency is increased to 3; when the comparison difference ΔP = 10*(Pset-ps) is less than c+3d and greater than or equal to c+4d, the fourth frequency is increased to 4; when the comparison difference ΔP = 10*(Pset-ps) is less than c+5d, the fifth frequency is increased to 5.

[0114] According to some embodiments of the present invention, the steps of determining that the air conditioning system is turned on and obtaining a preset target indoor temperature of the air conditioning system, as well as a current suction pressure and a current operating frequency of the compressor, specifically include:

[0115] After the compressor of the air-conditioning system is turned on, the current operating stage of the air-conditioning system is determined based on the continuous operation time of the compressor, and the target indoor temperature corresponding to the current operating stage, as well as the current suction pressure and current operating frequency of the compressor are obtained.

[0116] Furthermore, the step of calculating the target suction pressure according to the current operating frequency, the target indoor temperature and the calculation relationship specifically includes:

[0117] The target suction pressure in the current operating stage is calculated based on the current operating frequency, the target indoor temperature and the calculation relationship in the current operating stage.

[0118] In the above embodiment, when the air conditioning system is turned on, the control device 3 first detects the start-up of the compressor and records the startup time. The control device 3 determines the current operating stage of the air conditioning system based on the continuous operation time of the compressor (for example, the time from the last startup to the current time). This may include the startup stage, the stable operation stage, the stage close to the set temperature, etc.

[0119] For each operating phase, the control device 3 obtains the target indoor temperature, compressor suction pressure, and operating frequency corresponding to that phase based on preset parameters or historical data. These parameters may be pre-stored in the memory of the control device 3 or dynamically calculated using an algorithm.

[0120] Control device 3 calculates the target suction pressure (Pset) for the current operating stage using the current operating frequency (f), the target indoor temperature (Tairset), and a pre-stored equation (ps = f(Tair, f)). The system then adjusts the compressor frequency based on the previously determined target suction pressure for the current operating stage.

[0121] For example, if the final target indoor temperature under cooling of the air-conditioning system is 20°C, the air-conditioning system can be divided into four operating stages after it is turned on. In the first operating stage, the air-conditioning system continues to operate at the initial operating frequency of the compressor; 1800 seconds after it is turned on, the system enters the second operating stage, at which time the target indoor temperature is set to 30°C, and the target suction pressure corresponding to the target indoor temperature is calculated accordingly. By adjusting the compressor frequency, the actual suction pressure of the compressor is adjusted to the target suction pressure in the second operating stage; 3600 seconds after it is turned on, the system enters the third operating stage, at which time the target indoor temperature is set to 30°C. The target indoor temperature is set to 25°C, and the target suction pressure corresponding to the target indoor temperature is calculated accordingly. The actual suction pressure of the compressor is adjusted to the target suction pressure in the second operation stage by adjusting the compressor frequency. 5400 seconds after being turned on, the system enters the fourth operation stage, at which time the target indoor temperature is set to 20°C, and the target suction pressure corresponding to the target indoor temperature is calculated accordingly. The actual suction pressure of the compressor is adjusted to the target suction pressure in the second operation stage by adjusting the compressor frequency, so that the actual indoor temperature finally reaches the set final target indoor temperature, that is, 20°C.

[0122] In this way, by dividing the target indoor temperature into different temperature segments and gradually making the actual indoor temperature reach the final target indoor temperature in steps, the above-mentioned step-by-step and stage-by-stage adjustment method can improve the stability of the control process and further improve the accuracy of temperature regulation.

[0123] According to some embodiments of the present invention, the control method further includes: determining an initial operating frequency of a compressor of the air-conditioning system when it is started, based on the number of pre-starts of the air-conditioning system.

[0124] Specifically, the step of determining the initial operating frequency of the compressor of the air-conditioning system at startup according to the number of pre-starts of the air-conditioning system includes:

[0125] Assuming the number of pre-starts is zero, the initial operating frequency is the maximum allowable frequency of the compressor at the current outdoor ambient temperature;

[0126] Alternatively, if the number of previous startups is greater than zero, the initial operating frequency is the startup operating frequency or the shutdown operating frequency in the previous startup.

[0127] In the above embodiment, the control device 3 first detects the number of previous starts of the air-conditioning system, that is, the number of times the air-conditioning system has been started before the current start.

[0128] If the number of pre-starts is zero (i.e., this is the first start), the control device 3 will set the initial operating frequency to the maximum allowable frequency (fmax) of the compressor at the current outdoor ambient temperature. This is to quickly reach the user-set temperature when the system is first started, especially when the outdoor temperature is high.

[0129] If the number of previous starts is greater than zero (i.e., the system has been started before), the control device 3 will select the initial operating frequency at the last start or the operating frequency at the shutdown as the initial operating frequency for this start. This is done to maintain the continuity and stability of the system's operation and avoid frequent and large frequency adjustments. It also takes into account the operating status at the last shutdown.

[0130] For example, if the initial operating frequency of the startup is stored before the last shutdown, the initial operating frequency of the last startup will be used as the initial operating frequency of this startup; if not, the initial operating frequency of the last shutdown will be used as the initial operating frequency of this startup.

[0131] In this way, the control device 3 can intelligently set the initial operating frequency of the compressor based on the air conditioning system's startup history and current environmental conditions, thereby improving the system's response speed and energy efficiency while providing users with a comfortable indoor environment. This strategy also helps reduce compressor wear and extend its service life.

[0132] like Figure 3 As shown, according to the control device of the air-conditioning system of the second embodiment of the present invention, the indoor temperature control device is used to perform the indoor temperature control method for air-conditioning according to the first embodiment of the present invention, and the indoor temperature control device at least includes:

[0133] The first acquisition module 110 is used to determine whether the air conditioning system is turned on, and obtain a preset target indoor temperature of the air conditioning system, as well as a current suction pressure and a current operating frequency of the compressor;

[0134] The second acquisition module 120 is configured to calculate the target suction pressure according to the current operating frequency, the target indoor temperature and a calculation formula;

[0135] The control module 130 is configured to control and adjust the operating frequency of the compressor according to the target suction pressure and the current suction pressure.

[0136] The indoor temperature control device for air conditioning proposed in the present invention has a subsequent specific control process that is similar to and one-to-one corresponds to the control process of the above-mentioned indoor temperature control method, and the present invention will not elaborate on it again.

[0137] like Figure 4As shown, the present invention also includes an air-conditioning system, which includes an indoor unit 1 and an outdoor unit 2, and also includes an indoor temperature control device 3 for air conditioning as described in the embodiment of the second aspect of the present invention, wherein the control device 3 is connected to the indoor unit 1 and the outdoor unit 2 respectively, and there is no communication line between the indoor unit 1 and the outdoor unit 2.

[0138] Figure 5 An example of a physical structure diagram of an electronic device is shown below. Figure 5 As shown, the electronic device may include: a processor 810, a communications interface 820, a memory 830, and a communications bus 840, wherein the processor 810, the communications interface 820, and the memory 830 communicate with each other via the communications bus 840. The processor 810 may call logic instructions in the memory 830 to execute an air conditioning control method, which includes: determining that the air conditioning system is turned on, obtaining a preset target indoor temperature for the air conditioning system, and the current suction pressure and current operating frequency of the compressor; calculating a target suction pressure based on the current operating frequency, the target indoor temperature, and a calculation relationship; and controlling and adjusting the operating frequency of the compressor based on the target suction pressure and the current suction pressure.

[0139] In addition, the logic instructions in the above-mentioned memory 830 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when sold or used as an independent product. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the various embodiments of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0140] On the other hand, the present invention also provides a computer program product, which includes a computer program. The computer program can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the air conditioning control method provided by the above methods. The method includes: determining that the air conditioning system is turned on, obtaining the preset target indoor temperature of the air conditioning system, and the current suction pressure and current operating frequency of the compressor; calculating the target suction pressure based on the current operating frequency, the target indoor temperature and the calculation relationship; controlling and adjusting the operating frequency of the compressor based on the target suction pressure and the current suction pressure.

[0141] On the other hand, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, it is implemented to execute the air conditioning control method provided by the above methods. The method includes: determining that the air conditioning system is turned on, obtaining the preset target indoor temperature of the air conditioning system, and the current suction pressure and current operating frequency of the compressor; calculating the target suction pressure based on the current operating frequency, the target indoor temperature and the calculation relationship; controlling and adjusting the operating frequency of the compressor based on the target suction pressure and the current suction pressure.

[0142] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units. That is, they may be located in one place or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of the present embodiment. Persons of ordinary skill in the art will be able to understand and implement the present invention without inventive effort.

[0143] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus the necessary general hardware platform, or of course, by means of hardware. Based on this understanding, the essence of the above technical solution or the part that contributes to the existing technology can be embodied in the form of a software product. The computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a magnetic disk, an optical disk, etc., and includes a number of instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods of each embodiment or certain parts of the embodiment.

[0144] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A method for controlling indoor temperature of an air conditioner, characterized in that: include: Determining that the air conditioning system is turned on, obtaining a preset target indoor temperature of the air conditioning system, and a current suction pressure and a current operating frequency of the compressor; Calculating a target suction pressure according to the current operating frequency, the target indoor temperature, and the calculation relationship; The operating frequency of the compressor is controlled and adjusted according to the target suction pressure and the current suction pressure.

2. The indoor temperature control method for air conditioning according to claim 1, characterized in that: The step of controlling and adjusting the operating frequency of the compressor according to the target suction pressure and the current suction pressure specifically includes: Calculating the product of the difference between the target inhalation pressure and the current inhalation pressure and the correction coefficient to obtain a comparison difference; The operating frequency of the compressor is controlled and adjusted according to the interval in which the comparison difference value is located.

3. The indoor temperature control method for air conditioning according to claim 2, characterized in that: The step of controlling and adjusting the operating frequency of the compressor according to the interval in which the comparison difference value is located specifically includes: If the comparison difference is greater than a first set difference, the compressor is controlled to perform a frequency reduction operation; or if the comparison difference is less than a second set difference, the compressor is controlled to perform a frequency increase operation; The first set difference is greater than zero, and the second set difference is less than zero.

4. The indoor temperature control method for air conditioning according to claim 3, characterized in that: The step of controlling the compressor to perform a frequency reduction operation according to the comparison difference being greater than a first set difference specifically includes: According to the comparison difference being in the first difference range, controlling the compressor to reduce a first frequency drop value based on the current operating frequency; Alternatively, according to the comparison difference being in the second difference range, controlling the compressor to reduce a second frequency drop value based on the current operating frequency; Alternatively, according to the comparison difference being in the third difference range, controlling the compressor to reduce a third frequency drop value based on the current operating frequency; Among them, the first difference interval is greater than the first set difference, the second difference interval is greater than the first difference interval, the third difference interval is greater than the second difference interval, and the first frequency drop value is less than the second frequency drop value, and the second frequency drop value is less than the third frequency drop value.

5. The indoor temperature control method for air conditioning according to claim 3, characterized in that: The step of controlling the compressor to perform a frequency increase operation according to the comparison difference being less than a second set difference specifically includes: According to the comparison difference being in a fourth difference interval, controlling the compressor to increase a first frequency value based on a current operating frequency; Alternatively, according to the comparison difference being in the fifth difference range, controlling the compressor to increase the second frequency increment based on the current operating frequency; Alternatively, according to the comparison difference being in the sixth difference range, the compressor is controlled to increase the third frequency increment based on the current operating frequency; Among them, the fourth difference interval is smaller than the second set difference, the fifth difference interval is smaller than the fourth difference interval, the sixth difference interval is smaller than the fifth difference interval, and the first frequency appreciation is smaller than the second frequency appreciation, and the second frequency appreciation is smaller than the third frequency appreciation.

6. The indoor temperature control method for air conditioning according to claim 2, characterized in that: The correction system takes a value of 10.

7. The indoor temperature control method for air conditioning according to any one of claims 1 to 6, characterized in that: The step of determining that the air conditioning system is turned on and obtaining a preset target indoor temperature of the air conditioning system, and a current suction pressure and a current operating frequency of the compressor specifically includes: After the compressor of the air-conditioning system is turned on, the current operating stage of the air-conditioning system is determined based on the continuous operation time of the compressor, and the target indoor temperature corresponding to the current operating stage, as well as the current suction pressure and current operating frequency of the compressor are obtained.

8. The indoor temperature control method for air conditioning according to claim 7, characterized in that: The step of calculating the target suction pressure according to the current operating frequency, the target indoor temperature and the calculation relationship specifically includes: The target suction pressure in the current operating stage is calculated according to the current operating frequency, the target indoor temperature and the calculation relationship in the current operating stage.

9. The indoor temperature control method for air conditioning according to any one of claims 1 to 6, characterized in that: Also includes: An initial operating frequency of a compressor of the air-conditioning system when it is started is determined based on the number of pre-starts of the air-conditioning system.

10. The indoor temperature control method for air conditioning according to claim 9, characterized in that: The step of determining the initial operating frequency of the compressor of the air-conditioning system at startup based on the number of pre-starts of the air-conditioning system specifically includes: According to the number of pre-starts being zero, the initial operating frequency is the maximum allowable frequency of the compressor under the current outdoor ambient temperature; Alternatively, if the number of previous startups is greater than zero, the initial operating frequency is the startup operating frequency or the shutdown operating frequency during the last startup.

11. An indoor temperature control device for air conditioning, characterized in that: The indoor temperature control device is used to execute the indoor temperature control method for air conditioning according to any one of claims 1 to 10, and the indoor temperature control device at least comprises: A first acquisition module is configured to determine whether the air-conditioning system is turned on, and to acquire a preset target indoor temperature of the air-conditioning system, and a current suction pressure and a current operating frequency of the compressor; a second acquisition module, configured to calculate a target suction pressure according to the current operating frequency, the target indoor temperature, and the calculation formula; The control module is configured to control and adjust the operating frequency of the compressor according to the target suction pressure and the current suction pressure.

12. An air conditioning system, characterized in that: include: Indoor and outdoor units; The indoor temperature control device for an air conditioner as described in claim 11, wherein the indoor temperature control device is connected to the indoor unit and the outdoor unit respectively.

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