Air conditioning system control method

Abstract

The application relates to an air conditioning system control method, which comprises a compressor, a four-way valve, an indoor unit evaporator, an outdoor unit condenser, two expansion valves, a water tank and a one-way valve. By controlling the on-off of the four-way valve and the water tank and the outdoor unit condenser ports, the air conditioning system can execute multiple working modes such as refrigeration, water heating and single water heating, and solves the problem that the direct discharge of waste heat in the prior art causes great resource waste.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and more specifically, to an air conditioning system control method. Background Technology

[0002] In today's rapidly developing economy and significantly improved quality of life, families are increasingly seeking a comfortable and convenient living environment. Air conditioners and water heaters, as two indispensable appliances in modern homes, respectively play the crucial roles of regulating indoor climate and supplying domestic hot water. However, traditional household air source water heaters and air conditioning systems often follow independent design and operation modes. While this separate deployment can meet basic needs, it also brings unnecessary installation complexity and space occupation issues, posing a challenge to household resource management.

[0003] Of particular note is that air conditioning systems generate a significant amount of waste heat during cooling operations in summer or transitional seasons. Effective recovery and utilization of this heat would greatly alleviate the dependence of water heaters on additional energy sources, achieving efficient energy recycling. Currently, the amount of waste heat emitted by air conditioning systems is staggering, approximately 130% of the cooling capacity. This not only constitutes a massive loss of resources, but its uncontrolled release into the atmosphere also becomes a direct source of environmental heat pollution, exacerbating the urban heat island effect and posing a potential threat to ecological balance and residents' health. Summary of the Invention

[0004] The main objective of this invention is to provide an air conditioning system control method to solve the problem of significant resource waste caused by the direct discharge of waste heat from air conditioning systems in the prior art.

[0005] To achieve the above objectives, according to one aspect of the present invention, an air conditioning system with a water heating function is provided, comprising: a compressor, a four-way valve, an indoor unit evaporator, an outdoor unit condenser, a first expansion valve, a second expansion valve, a water tank, and a one-way valve. The outlet end of the compressor is connected to both the first end of the four-way valve and the first end of the water tank; the inlet end of the compressor is connected to the second end of the four-way valve; the first end of the indoor unit evaporator is connected to the third end of the four-way valve; the first end of the outdoor unit condenser is connected to the fourth end of the four-way valve; any two of the second ends of the indoor unit evaporator, the outdoor unit condenser, and the water tank are connected; the first expansion valve is disposed at the second end of the water tank; the second expansion valve is disposed at the second end of the indoor unit evaporator; and the one-way valve is disposed at the second end of the water tank. The first end of the four-way valve, the first end of the water tank, and the second end of the outdoor unit condenser can all be switched on and off to control the air conditioning system to perform multiple operating modes, including at least a cooling and water heating mode and a single water heating mode.

[0006] Furthermore, the air conditioning system includes: a first control valve, which is disposed at the first end of the four-way valve to control the opening and closing of the first end of the four-way valve; a second control valve, which is disposed at the first end of the water tank to control the opening and closing of the first end of the water tank; and a third control valve, which is disposed at the second end of the outdoor unit condenser to control the opening and closing of the second end of the outdoor unit condenser.

[0007] Furthermore, when the air conditioning system is in cooling and heating water mode, the first control valve is open, the second control valve is open, the third control valve is open, the first and fourth ends of the four-way valve are connected, and the second and third ends of the four-way valve are connected; when the air conditioning system is in single heating water mode, the first control valve is closed, the second control valve is open, the third control valve is open, the second and fourth ends of the four-way valve are connected, and the indoor unit evaporator and the second expansion valve do not work.

[0008] Furthermore, the air conditioning system includes a single cooling mode. When the air conditioning system is in single cooling mode, the first control valve is open, the second control valve is closed, the third control valve is open, the first and fourth ends of the four-way valve are connected, and the second and third ends of the four-way valve are connected.

[0009] Furthermore, the air conditioning system includes a single heating mode. When the air conditioning system is in single heating mode, the first control valve is open, the second control valve is closed, the third control valve is open, the first and third ends of the four-way valve are connected, and the second and fourth ends of the four-way valve are connected.

[0010] Furthermore, the air conditioning system includes heating and water heating modes. When the air conditioning system is in heating and water heating mode, the first control valve opens, the second control valve opens, the third control valve opens, the first and third ends of the four-way valve are connected, and the second and fourth ends of the four-way valve are connected.

[0011] According to another aspect of the present invention, an air conditioning system control method is provided, applicable to the aforementioned air conditioning system. The air conditioning system control method includes: controlling the air conditioning system to start; when the hot water preparation economy mode is activated, acquiring the usage time of multiple operating modes within a predetermined number of days prior to the current date; calculating the actual ratio X1 of the usage time of the cooling and heating water mode and the usage time of the single heating water mode; and comparing the actual ratio X1 with a set ratio X; if X1 < X, acquiring the temperature of the outdoor environment for each day within the predetermined number of days prior to the current date; identifying the temperature data of the highest temperature range for each day in the outdoor environment; and calculating the indoor temperature for the predetermined number of days prior to the current date. The average temperature A1℃ of the highest temperature range in the external environment each day is compared with the first preset temperature A℃. If A1℃ ≥ A℃, the first real-time temperature A2℃ of the outdoor environment is detected at the time corresponding to the start time of the highest temperature range on the next day, and the first real-time temperature A2℃ is compared with the first preset temperature A℃. If A2℃ ≥ A℃, the actual water temperature Tw in the water tank at the current time is detected, and the actual water temperature Tw is compared with the target water temperature T1. If Tw < T1, the air conditioning system is controlled to enter the single water heating mode. After the actual water temperature Tw reaches the target water temperature T1, the air conditioning system is controlled to start the water tank heat preservation mode.

[0012] Furthermore, the air conditioning system control method includes: if X1≥X, then controlling the air conditioning system to standby mode, and then operating according to the user-selected working mode; and / or if A1℃<A℃, then controlling the air conditioning system to standby mode, and then operating according to the user-selected working mode; and / or if Tw≥T1, then controlling the air conditioning system to standby mode, and then operating according to the user-selected working mode.

[0013] Furthermore, the air conditioning system control method includes: if A1℃ < A℃ or A2℃ < A℃, then obtain the off-peak electricity period of the area where the water tank is located, and detect whether the current period is an off-peak electricity period; if the current period is not an off-peak electricity period, then control the water tank to standby, and then operate according to the working mode selected by the user along with the air conditioning system, and return to the judgment again after the current period reaches the off-peak electricity period.

[0014] Furthermore, the air conditioning system control method includes: if the current time period is a low-electricity period, detecting the second real-time temperature A3℃ of the outdoor environment during the current time period, and comparing the second real-time temperature A3℃ with the second preset temperature B℃; if A3℃ < B℃, then controlling the air conditioning system to standby, and then operating according to the working mode selected by the user.

[0015] Furthermore, the air conditioning system control method includes: if A3℃≥B℃, then the actual water temperature Tw in the water tank at the current time period is detected, and the actual water temperature Tw is compared with the target water temperature T1; if Tw≥T1, then the air conditioning system is put into standby mode, and then operates according to the working mode selected by the user.

[0016] Furthermore, the air conditioning system control method includes: if Tw < T1, then control the air conditioning system to enter the single water heating mode; after the actual water temperature Tw reaches the target water temperature T1, control the air conditioning system to start the water tank insulation mode.

[0017] According to the technical solution of this invention, the air conditioning system with water heating function includes: a compressor, a four-way valve, an indoor unit evaporator, an outdoor unit condenser, a first expansion valve, a second expansion valve, a water tank, and a one-way valve. The outlet end of the compressor is connected to both the first end of the four-way valve and the first end of the water tank. The inlet end of the compressor is connected to the second end of the four-way valve. The first end of the indoor unit evaporator is connected to the third end of the four-way valve. The first end of the outdoor unit condenser is connected to the fourth end of the four-way valve. Any two of the second ends of the indoor unit evaporator, the outdoor unit condenser, and the water tank are connected. The first expansion valve is located at the second end of the water tank, the second expansion valve is located at the second end of the indoor unit evaporator, and the one-way valve is located at the second end of the water tank. The first end of the four-way valve, the first end of the water tank, and the second end of the outdoor unit condenser can all be switched on and off to control the air conditioning system to perform multiple operating modes, including at least a cooling and water heating mode and a single water heating mode. Thus, the air conditioning system of the present invention can flexibly switch working modes according to different needs and environmental conditions, satisfying both the cooling or heating needs of the air conditioning system and efficiently producing hot water. This solves the problem of significant resource waste caused by the direct discharge of waste heat from air conditioning in existing technologies. It is especially suitable for use in homes and small commercial spaces. For example, in summer, the air conditioning system can prioritize indoor cooling while using waste heat to produce hot water, while in winter, the air conditioning system can prioritize heating while providing a stable supply of hot water. This greatly improves energy efficiency, achieves comprehensive energy utilization, and reduces operating costs. Attached Figure Description

[0018] The accompanying drawings, which form part of this specification, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0019] Figure 1 A schematic diagram of the refrigerant flow state in a single cooling mode is shown in an embodiment of the air conditioning system of the present invention.

[0020] Figure 2 It shows Figure 1 The diagram shows the refrigerant flow state of the air conditioning system when it is in cooling and heating water mode.

[0021] Figure 3 It shows Figure 1 The diagram shows the refrigerant flow state of the air conditioning system in heating mode only.

[0022] Figure 4 It shows Figure 1 The diagram shows the refrigerant flow state of the air conditioning system when it is in heating and water heating modes.

[0023] Figure 5 It shows Figure 1 The diagram shows the refrigerant flow state of the air conditioning system in single water heating mode.

[0024] Figure 6 It shows Figure 1 The control steps of an embodiment of the control method for the air conditioning system shown are illustrated.

[0025] Figure 7 It shows Figure 6 The flowchart illustrates an embodiment of the control method for the air conditioning system shown.

[0026] The above figures include the following reference numerals:

[0027] 1. Compressor; 2. Four-way valve; 3. Indoor unit evaporator; 4. Outdoor unit condenser; 5. First expansion valve; 6. Second expansion valve; 7. Water tank; 8. Check valve; 9. First control valve; 10. Second control valve; 11. Third control valve. Detailed Implementation

[0028] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0029] like Figures 1 to 5As shown, this invention provides an air conditioning system with a water heating function, comprising: a compressor 1, a four-way valve 2, an indoor unit evaporator 3, an outdoor unit condenser 4, a first expansion valve 5, a second expansion valve 6, a water tank 7, and a one-way valve 8. The outlet end of the compressor 1 is connected to both the first end of the four-way valve 2 and the first end of the water tank 7. The inlet end of the compressor 1 is connected to the second end of the four-way valve 2. The first end of the indoor unit evaporator 3 is connected to the third end of the four-way valve 2. The first end of the outdoor unit condenser 4 is connected to the fourth end of the four-way valve 2. Any two of the second ends of the indoor unit evaporator 3, the outdoor unit condenser 4, and the water tank 7 are connected. The first expansion valve 5 is located at the second end of the water tank 7. The second expansion valve 6 is located at the second end of the indoor unit evaporator 3. The one-way valve 8 is located at the second end of the water tank 7. The first end of the four-way valve 2, the first end of the water tank 7, and the second end of the outdoor unit condenser 4 can all be switched on and off to control the air conditioning system to perform multiple operating modes, including at least a cooling and water heating mode and a single water heating mode. Thus, the air conditioning system of the present invention can flexibly switch working modes according to different needs and environmental conditions, satisfying both the cooling or heating needs of the air conditioning system and efficiently producing hot water. This solves the problem of significant resource waste caused by the direct discharge of waste heat from air conditioning in existing technologies. It is especially suitable for use in homes and small commercial spaces. For example, in summer, the air conditioning system can prioritize indoor cooling while using waste heat to produce hot water, while in winter, the air conditioning system can prioritize heating while providing a stable supply of hot water. This greatly improves energy efficiency, achieves comprehensive energy utilization, and reduces operating costs.

[0030] like Figures 1 to 5 As shown, the air conditioning system includes: a first control valve 9, which is located at the first end of the four-way valve 2 to control the opening and closing of the first end of the four-way valve 2; a second control valve 10, which is located at the first end of the water tank 7 to control the opening and closing of the first end of the water tank 7; and a third control valve 11, which is located at the second end of the outdoor unit condenser 4 to control the opening and closing of the second end of the outdoor unit condenser 4. Through the coordinated operation of the first control valve 9, the second control valve 10, and the third control valve 11, the air conditioning system can precisely control the flow of refrigerant, which not only improves the flexibility of the air conditioning system operation but also intelligently matches the most suitable operating mode under different seasons and weather conditions, thereby achieving optimal energy utilization efficiency under different operating modes and providing users with a more comfortable and energy-saving user experience.

[0031] like Figure 2 and Figure 5As shown, when the air conditioning system is in cooling and heating water mode, the first control valve 9 is open, the second control valve 10 is open, the third control valve 11 is open, the first and fourth ends of the four-way valve 2 are connected, and the second and third ends of the four-way valve 2 are connected. When the air conditioning system is in single heating water mode, the first control valve 9 is closed, the second control valve 10 is open, the third control valve 11 is open, the second and fourth ends of the four-way valve 2 are connected, and the indoor unit evaporator 3 and the second expansion valve 6 do not work. In this way, the cooling and heating water mode ensures that the energy efficiency ratio of the air conditioning system does not drop significantly when preparing hot water while cooling. In the single heating water mode, unnecessary air conditioning cooling or heating is avoided, saving energy and improving hot water preparation efficiency. It is especially suitable for occasions with immediate hot water demand, providing hot water quickly while ensuring the comfort of the air conditioning system and improving service quality.

[0032] like Figure 1 As shown, the air conditioning system includes a single cooling mode. When the air conditioning system is in single cooling mode, the first control valve 9 is open, the second control valve 10 is closed, the third control valve 11 is open, and the first and fourth ends of the four-way valve 2 are connected, as are the second and third ends. This single cooling mode is suitable for hot summer weather when users only need the air conditioning system to cool and do not need to prepare hot water. It can quickly lower the indoor temperature, ensuring that users get a cool experience in the shortest possible time, maximizing the cooling efficiency of the air conditioner, reducing energy consumption, and avoiding energy loss during the hot water preparation process, thus improving the overall system efficiency.

[0033] like Figure 3 As shown, the air conditioning system includes a single heating mode. When the air conditioning system is in single heating mode, the first control valve 9 is open, the second control valve 10 is closed, the third control valve 11 is open, the first and third ends of the four-way valve 2 are connected, and the second and fourth ends of the four-way valve 2 are connected. This single heating mode is suitable for cold winter weather, where users only need the air conditioning system to heat the room and do not need to prepare hot water, thus quickly increasing the indoor temperature.

[0034] like Figure 4 As shown, the air conditioning system includes heating and hot water heating modes. When the air conditioning system is in heating and hot water heating mode, the first control valve 9, the second control valve 10, and the third control valve 11 are open. The first and third ends of the four-way valve 2 are connected, and the second and fourth ends of the four-way valve 2 are connected. This heating and hot water heating mode allows the air conditioning system to simultaneously provide indoor heating and hot water preparation in cold winter weather, meeting users' needs for hot water while heating. It ensures indoor warmth while providing instant hot water service, satisfying needs for bathing, washing dishes, and drinking, greatly improving user comfort and enhancing the practicality and user satisfaction of the air conditioning system.

[0035] like Figure 6 and Figure 7 As shown, the present invention also provides an air conditioning system control method applicable to the aforementioned air conditioning system. The air conditioning system control method includes: controlling the air conditioning system to start; when the hot water preparation economy mode is activated, obtaining the usage time of multiple working modes within a predetermined number of days prior to the current date; calculating the actual ratio X1 of the usage time of the cooling and heating water mode and the usage time of the single heating water mode; and comparing the actual ratio X1 with the set ratio X; if X1 < X, obtaining the temperature of the outdoor environment for each day within the predetermined number of days prior to the current date; finding the temperature data of the highest temperature range in the outdoor environment for each day; and calculating the outdoor environment temperature within the predetermined number of days prior to the current date. The average temperature A1℃ of the highest temperature range each day is compared with a first preset temperature A℃. If A1℃ ≥ A℃, the first real-time outdoor temperature A2℃ is detected at the time corresponding to the start of the highest temperature range on the next day, and compared with the first preset temperature A℃. If A2℃ ≥ A℃, the actual water temperature Tw in the water tank 7 at the current time is detected, and compared with the target water temperature T1. If Tw < T1, the air conditioning system is controlled to enter single-heating water mode. After the actual water temperature Tw reaches the target water temperature T1, the air conditioning system is controlled to start the water tank insulation mode. In this way, the air conditioning system control method of the present invention can intelligently analyze user needs and environmental conditions, automatically adjust the working mode of the air conditioning system, select the most economical hot water preparation method, avoid energy waste, reduce the operating cost of the air conditioning system, and achieve sustainable energy utilization.

[0036] Specifically, the reservation period can be one week.

[0037] like Figure 6 As shown, the air conditioning system control method includes: if X1≥X, then the air conditioning system is put into standby mode, and then operates according to the user-selected operating mode; and / or if A1℃<A℃, then the air conditioning system is put into standby mode, and then operates according to the user-selected operating mode; and / or if Tw≥T1, then the air conditioning system is put into standby mode, and then operates according to the user-selected operating mode. This control strategy ensures that the air conditioning system meets user needs while avoiding unnecessary operation, saving energy, and improving the economy and environmental friendliness of the air conditioning system.

[0038] The air conditioning system control method of the present invention adopts a cooling and heating water mode, which can produce domestic hot water by recovering the condensation waste heat stably discharged during the operation of the air conditioning system, achieving almost zero additional power consumption. When users have cooling needs, prioritizing the use of the cooling and heating water mode to prepare hot water will be more energy-efficient.

[0039] like Figure 6As shown, the air conditioning system control method includes: if A1℃ < A℃ or A2℃ < A℃, then acquiring the off-peak electricity consumption data for the area where water tank 7 is located, and detecting whether the current time period is an off-peak electricity consumption period; if the current time period is not an off-peak electricity consumption period, then controlling water tank 7 to standby, and then operating according to the user-selected working mode along with the air conditioning system, and returning to the judgment after the current time period reaches an off-peak electricity consumption period. This fully utilizes the peak-valley difference in electricity prices, enabling the air conditioning system to prepare hot water during the lowest cost period, avoiding hot water preparation during high electricity price periods, thereby reducing the user's electricity expenses, especially in areas with large electricity price differences, the effect is particularly significant. In addition, it also avoids the additional pressure on the power grid during high electricity price periods, which helps the stable operation of the power grid and improves the economy of the air conditioning system.

[0040] like Figure 6 As shown, the air conditioning system control method includes: if the current time period is a low-electricity consumption period, detecting the second real-time outdoor temperature A3℃, and comparing the second real-time temperature A3℃ with the second preset temperature B℃; if A3℃ < B℃, then controlling the air conditioning system to standby, and then operating according to the user-selected working mode. This takes into account both electricity price and outdoor temperature factors, further improving the system's operating efficiency and economy.

[0041] like Figure 6 As shown, the air conditioning system control method includes: if A3℃ ≥ B℃, then the actual water temperature Tw in water tank 7 at the current time is detected, and the actual water temperature Tw is compared with the target water temperature T1; if Tw ≥ T1, then the air conditioning system is put into standby mode, and then operates according to the user-selected working mode. This avoids overheating, ensures the comfort and safety of hot water, provides hot water quickly when needed, and avoids safety hazards caused by overheating, thus improving safety in use.

[0042] like Figure 6 As shown, the air conditioning system control method includes: if Tw < T1, the air conditioning system is controlled to enter a single-heating water mode; after the actual water temperature Tw reaches the target water temperature T1, the air conditioning system is controlled to activate the water tank insulation mode. This ensures timely hot water supply and automatically enters the insulation mode after hot water preparation, preventing a rapid drop in hot water temperature and improving the user experience. Especially in commercial locations requiring hot water supply, it ensures sufficient hot water supply during peak hours, while automatically entering the insulation mode during off-peak hours reduces heat loss from the air conditioning system and provides higher operating efficiency.

[0043] The air conditioning system and its control method of the present invention can flexibly respond to different seasons and environmental changes by intelligently analyzing user habits and environmental conditions, ensuring the stability and reliability of air conditioning and hot water supply, realizing the efficient combination of hot water preparation and air conditioning operation, reducing energy consumption while meeting users' hot water needs, improving the overall energy efficiency of the system, effectively avoiding energy waste during peak electricity consumption periods, reducing operating costs, and providing users with a more economical and environmentally friendly user experience.

[0044] like Figure 7 As shown, the specific flow of the air conditioning system control method of the present invention is as follows:

[0045] When a user needs hot water, the optimal operating mode is selected based on the ambient temperature and the user's usage habits. If the proportion of use of the cooling and heating water modes is high in the predetermined number of days before the current date, hot water will be prepared using the cooling and heating water modes after the user has a cooling demand. If the proportion of use of the single heating water mode is high, it is necessary to determine whether the average temperature of the highest ambient temperature range each day in the predetermined number of days before the current date meets the high-efficiency heating range of water tank 7. If neither of the above two conditions is met, water tank 7 will be used as a thermal energy storage device, making full use of the peak-valley electricity pricing mechanism. When the ambient temperature exceeds the second preset temperature B℃, off-peak electricity will be used to store thermal energy to prepare hot water, thereby reducing the operating cost of the air conditioning system and improving the operating efficiency and economy of the air conditioning system.

[0046] The user's choice to enter the economic mode for hot water preparation will determine whether to proceed to the next stage of the process.

[0047] When the user does not select to activate the hot water preparation economy mode, the air conditioning system is put into standby mode, and then operates according to the working mode selected by the user.

[0048] When a user selects to activate the hot water preparation economy mode, the air conditioning system obtains the usage time of five operating modes over the past week, calculates the actual ratio X1 of the usage time of the cooling and heating water modes and the usage time of the single heating water mode, and compares the actual ratio X1 with the set ratio X. The comparison result serves as the basis for proceeding to the next process.

[0049] (1) If X1≥X, it is determined that the temperature is relatively high in the past week, and users have a strong demand for cooling. The proportion of use of cooling and heating water modes is relatively high. Since using cooling and heating water modes to prepare hot water is more economical and environmentally friendly and consumes almost zero electricity, the cooling and heating water modes should be used first to prepare hot water according to the user's usage habits. At this time, the air conditioning system is put into standby mode, and then it runs according to the working mode selected by the user. By default, the condensation waste heat of the air conditioning system is recovered to prepare hot water when the user has a cooling demand.

[0050] If X1 < X, it is determined that the temperature has been suitable or low in the past week, resulting in low cooling demand from users. In this case, a single-heating-water mode is typically used to prepare hot water. The air conditioning system then obtains the temperature data automatically recorded daily from the outdoor temperature sensor over the past week, identifies the highest temperature range for each day, calculates the average temperature A1℃ for that range, and compares the average temperature A1℃ with the first preset temperature A℃. The comparison result serves as the basis for proceeding to the next step.

[0051] (2) If A1℃≥A℃, then it is highly probable that the temperature of the highest temperature range of the next day is within the efficient heating range of water tank 7. The higher the air temperature, the easier it is for water tank 7 to absorb heat from the environment, which is more energy-efficient than heating when the air temperature is lower. Therefore, at the time corresponding to the start time of the highest temperature range of the next day, the air conditioning system detects the first real-time temperature A2℃ of the outdoor environment and the actual water temperature Tw in water tank 7 at the current time of the start time. The first real-time temperature A2℃ is compared with the first preset temperature A℃, and the actual water temperature Tw is compared with the target water temperature T1. The comparison results are used as the basis for entering the next process:

[0052] (3) If A2℃≥A℃ and Tw<T1, the air conditioning system enters the single heating water mode. At this time, the first control valve 9 is closed, the second control valve 10 is open, the third control valve 11 is open, the second end and the fourth end of the four-way valve 2 are connected, the indoor unit evaporator 3 and the second expansion valve 6 do not work, the outdoor unit condenser 4 starts, the working efficiency of the air conditioning system is equivalent to that of an air source water heater, all the heat is used to heat the water in the water tank 7, and after the actual water temperature Tw reaches the target water temperature T1, the air conditioning system is controlled to start the water tank heat preservation mode.

[0053] If A2℃≥A℃ and Tw≥T1, then the air conditioning system will be put into standby mode and then run according to the operating mode selected by the user.

[0054] If A1℃ < A℃ or A2℃ < A℃, the air conditioning system obtains the off-peak electricity consumption data for the area where the water heater is located, checks whether the current time period has reached the off-peak electricity consumption period, and if the current time period is not the off-peak electricity consumption period, the air conditioning system is put into standby mode, and then operates according to the working mode selected by the user, and returns to the judgment again after the current time period reaches the off-peak electricity consumption period.

[0055] If the current time period is a low-electricity period, obtain the second real-time temperature A3℃ detected by the outdoor ambient temperature sensor and the actual water temperature Tw in the water tank 7 at the current time. Compare the second real-time temperature A3℃ with the second preset temperature B℃, and compare the actual water temperature Tw with the target water temperature T1. The comparison result is used as the basis for proceeding to the next process.

[0056] (4) If A3℃≥B℃ and Tw<T1, then control the air conditioning system to enter single water heating mode.

[0057] If A3℃ < B℃ or Tw ≥ T1, the air conditioning system will be put into standby mode and then run according to the operating mode selected by the user.

[0058] As can be seen from the above description, the embodiments of the present invention achieve the following technical effects:

[0059] The air conditioning system with heating water function of the present invention includes: a compressor 1, a four-way valve 2, an indoor unit evaporator 3, an outdoor unit condenser 4, a first expansion valve 5, a second expansion valve 6, a water tank 7, and a one-way valve 8. The outlet end of the compressor 1 is connected to the first end of the four-way valve 2 and the first end of the water tank 7. The inlet end of the compressor 1 is connected to the second end of the four-way valve 2. The first end of the indoor unit evaporator 3 is connected to the third end of the four-way valve 2. The first end of the outdoor unit condenser 4 is connected to the fourth end of the four-way valve 2. Any two of the second ends of the indoor unit evaporator 3, the outdoor unit condenser 4, and the water tank 7 are connected. The first expansion valve 5 is located at the second end of the water tank 7. The second expansion valve 6 is located at the second end of the indoor unit evaporator 3. The one-way valve 8 is located at the second end of the water tank 7. The first end of the four-way valve 2, the first end of the water tank 7, and the second end of the outdoor unit condenser 4 can all be switched on and off to control the air conditioning system to perform multiple operating modes. The multiple operating modes include at least a cooling and heating water mode and a single heating water mode. Thus, the air conditioning system of the present invention can flexibly switch working modes according to different needs and environmental conditions, satisfying both the cooling or heating needs of the air conditioning system and efficiently producing hot water. This solves the problem of significant resource waste caused by the direct discharge of waste heat from air conditioning in existing technologies. It is especially suitable for use in homes and small commercial spaces. For example, in summer, the air conditioning system can prioritize indoor cooling while using waste heat to produce hot water, while in winter, the air conditioning system can prioritize heating while providing a stable supply of hot water. This greatly improves energy efficiency, achieves comprehensive energy utilization, and reduces operating costs.

[0060] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0061] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0062] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0063] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0064] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0065] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for controlling an air conditioning system, characterized in that, This is applicable to air conditioning systems with heating water function, including: a compressor (1), a four-way valve (2), an indoor unit evaporator (3), an outdoor unit condenser (4), a first expansion valve (5), a second expansion valve (6), a water tank (7), and a one-way valve (8). The outlet end of the compressor (1) is connected to the first end of the four-way valve (2) and the first end of the water tank (7). The inlet end of the compressor (1) is connected to the second end of the four-way valve (2). The first end of the indoor unit evaporator (3) is connected to the third end of the four-way valve (2). The first end of the outdoor unit condenser (4) is connected to the fourth end of the four-way valve (2). Any two of the second ends of the evaporator (3), the second end of the outdoor unit condenser (4), and the second end of the water tank (7) are connected. The first expansion valve (5) is located at the second end of the water tank (7), the second expansion valve (6) is located at the second end of the indoor unit evaporator (3), and the one-way valve (8) is located at the second end of the water tank (7). The first end of the four-way valve (2), the first end of the water tank (7), and the second end of the outdoor unit condenser (4) can be switched on and off to control the air conditioning system to perform multiple working modes. The multiple working modes include at least a cooling and heating water mode and a single heating water mode. The air conditioning system control method includes: Control the air conditioning system to start up. When the hot water preparation economic mode is turned on, obtain the usage time of the various working modes within the predetermined number of days before the current date, calculate the actual ratio X1 of the usage time of the cooling and heating water mode and the usage time of the single heating water mode, and compare the actual ratio X1 with the set ratio X. If X1 < X, then obtain the temperature of each day in the outdoor environment within the predetermined number of days before the current date, find the temperature data of the highest temperature range of each day in the outdoor environment, calculate the average temperature A1℃ of the highest temperature range of each day in the outdoor environment within the predetermined number of days before the current date, and compare the average temperature A1℃ with the first preset temperature A℃. If A1℃≥A℃, then at the time corresponding to the start time of the highest temperature range on the next day, the first real-time temperature A2℃ of the outdoor environment is detected, and the magnitude of the first real-time temperature A2℃ is compared with the first preset temperature A℃. If A2℃≥A℃, then detect the actual water temperature Tw in the water tank (7) during the current time period and compare the actual water temperature Tw with the target water temperature T1; If Tw < T1, the air conditioning system is controlled to enter the single water heating mode. After the actual water temperature Tw reaches the target water temperature T1, the air conditioning system is controlled to start the water tank heat preservation mode.

2. The air conditioning system control method according to claim 1, characterized in that, The air conditioning system includes: The first control valve (9) is disposed at the first end of the four-way valve (2) to control the opening and closing of the first end of the four-way valve (2); The second control valve (10) is disposed at the first end of the water tank (7) to control the opening and closing of the first end of the water tank (7); The third control valve (11) is located at the second end of the outdoor unit condenser (4) to control the on / off state of the second end of the outdoor unit condenser (4).

3. The air conditioning system control method according to claim 2, characterized in that, When the air conditioning system is in the cooling and heating water mode, the first control valve (9) is open, the second control valve (10) is open, the third control valve (11) is open, the first end and the fourth end of the four-way valve (2) are connected, and the second end and the third end of the four-way valve (2) are connected. When the air conditioning system is in the single heating water mode, the first control valve (9) is closed, the second control valve (10) is open, the third control valve (11) is open, the second end and the fourth end of the four-way valve (2) are connected, and the indoor unit evaporator (3) and the second expansion valve (6) are not working.

4. The air conditioning system control method according to claim 2, characterized in that, The air conditioning system includes a single cooling mode. When the air conditioning system is in the single cooling mode, the first control valve (9) is open, the second control valve (10) is closed, the third control valve (11) is open, the first end and the fourth end of the four-way valve (2) are connected, and the second end and the third end of the four-way valve (2) are connected.

5. The air conditioning system control method according to claim 2, characterized in that, The air conditioning system includes a single heating mode. When the air conditioning system is in the single heating mode, the first control valve (9) is open, the second control valve (10) is closed, the third control valve (11) is open, the first end and the third end of the four-way valve (2) are connected, and the second end and the fourth end of the four-way valve (2) are connected.

6. The air conditioning system control method according to claim 2, characterized in that, The air conditioning system includes a heating and water heating mode. When the air conditioning system is in the heating and water heating mode, the first control valve (9) is open, the second control valve (10) is open, the third control valve (11) is open, the first end and the third end of the four-way valve (2) are connected, and the second end and the fourth end of the four-way valve (2) are connected.

7. The air conditioning system control method according to claim 1, characterized in that, The air conditioning system control method includes: If X1 ≥ X, then the air conditioning system is put into standby mode, and then operates according to the user-selected working mode; and / or If A1℃ < A℃, then the air conditioning system is put into standby mode, and then operates according to the user-selected working mode; and / or If Tw ≥ T1, the air conditioning system is put into standby mode and then operates according to the user-selected working mode.

8. The air conditioning system control method according to claim 1, characterized in that, The air conditioning system control method includes: If A1℃ < A℃ or A2℃ < A℃, then obtain the off-peak electricity consumption data of the area where the water tank (7) is located, and detect whether the current time period is an off-peak electricity consumption period; If the current time period is not the off-peak electricity period, the water tank (7) is put into standby mode and then runs with the air conditioning system according to the working mode selected by the user. The system will return to the judgment again after the current time period reaches the off-peak electricity period.

9. The air conditioning system control method according to claim 8, characterized in that, The air conditioning system control method includes: If the current time period is the off-peak electricity consumption period, detect the second real-time temperature A3℃ of the outdoor environment during the current time period, and compare the second real-time temperature A3℃ with the second preset temperature B℃. If A3℃ < B℃, the air conditioning system will be put into standby mode and then run according to the operating mode selected by the user.

10. The air conditioning system control method according to claim 9, characterized in that, The air conditioning system control method includes: If A3℃≥B℃, then detect the actual water temperature Tw in the water tank (7) during the current time period and compare the actual water temperature Tw with the target water temperature T1; If Tw ≥ T1, the air conditioning system is put into standby mode and then operates according to the user-selected working mode.

11. The air conditioning system control method according to claim 10, characterized in that, The air conditioning system control method includes: If Tw < T1, the air conditioning system is controlled to enter the single water heating mode. After the actual water temperature Tw reaches the target water temperature T1, the air conditioning system is controlled to start the water tank insulation mode.

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