Air conditioner control method and device, air conditioner, storage medium and program product

Abstract

The invention discloses an air conditioner control method and device, an air conditioner, a storage medium and a computer program product, the air conditioner comprises at least one terminal device, the terminal device comprises a target anti-freezing terminal device, and the target anti-freezing terminal device is connected with a water valve and a water pump through pipelines; the method comprises the steps of determining whether a water valve needs to be prevented from being frozen or not according to the outdoor environment temperature and the closing duration of a target anti-freezing terminal device under the condition that the air conditioner operates in a heating mode and the target anti-freezing terminal device is closed; if it is determined that the water valve needs to be prevented from being frozen, the water valve and the water pump are opened, and then the water valve and the water pump are closed after the opening duration of the water valve and the water pump reaches the preset operation duration. According to the scheme, whether the water valve needs to be prevented from freezing is determined according to the outdoor environment temperature and the closing duration of the end device, the accuracy of anti-freezing control is improved, the water valve is prevented from being frozen, and the stability of the air conditioner is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of air conditioning, and specifically relates to a control method, device, air conditioner, storage medium and computer program product of an air conditioner, and in particular to a control method, device, air conditioner, storage medium and computer program product for preventing a water valve of an air conditioner from freezing. Background Art

[0002] Air source heat pump air conditioner is a multifunctional integrated unit that integrates cooling, heating, floor heating, and radiator heating functions. It consists of an outdoor main unit and an indoor terminal device. The unit provides air-conditioned cold / hot water through the outdoor main unit, which is transported to the indoor terminal device by the water pipe system. The terminal is divided into two types of air supply: floor radiation and fan coil unit. When users install air source heat pumps, considering the noise problem at the end of the fan coil unit, most users will choose to install the water valve at the end of the fan coil unit outdoors. However, in winter, the outdoor ambient temperature below 0℃ will cause the water in the outdoor water pipe to freeze. After the water freezes, its volume will increase, which may cause the water pipe to freeze and the water valve to freeze.

[0003] The above contents are only used to assist in understanding the technical solution of the present invention and do not constitute an admission that the above contents are prior art. Summary of the invention

[0004] The object of the present invention is to provide an air conditioner control method, device, air conditioner, storage medium and computer program product to solve the problem of water pipes freezing and water valves freezing at the air conditioner terminal device on the outdoor side when the outdoor temperature is too low in related schemes, so as to achieve the effect of improving the accuracy of anti-freeze control, avoiding water valve freezing and improving the stability of the air conditioner by determining whether to prevent the water valve from freezing based on the outdoor ambient temperature and the length of time the terminal device is closed.

[0005] The present invention provides a control method for an air conditioner, wherein the air conditioner comprises at least one terminal device; the at least one terminal device comprises a target anti-freezing terminal device; the target anti-freezing terminal device is connected to a water valve and a water pump through a pipeline; the water valve is used to control the on-off of water flowing through, and the water pump is used to control the flow of water; the valve is arranged on the outdoor side; the method comprises: when the air conditioner is running for heating and the target anti-freezing terminal device is closed, obtaining the outdoor ambient temperature and the duration of closing of the target anti-freezing terminal device; determining whether it is necessary to prevent the water valve from freezing according to the outdoor ambient temperature and the duration of closing of the target anti-freezing terminal device; if it is determined that the water valve needs to be prevented from freezing, opening the water valve and the water pump, and then closing the water valve and the water pump after the opening duration of the water valve and the water pump reaches a preset operating duration.

[0006] In some embodiments, whether it is necessary to prevent the water valve from freezing is determined based on the outdoor ambient temperature and the duration that the target anti-freeze terminal device is closed, including: judging the relationship between the outdoor ambient temperature and a preset anti-freeze temperature; if the outdoor ambient temperature is greater than or equal to the preset anti-freeze temperature, determining that it is not necessary to prevent the water valve from freezing; if the outdoor ambient temperature is less than the preset anti-freeze temperature, determining a set anti-freeze duration based on the range of the outdoor ambient temperature, and then determining whether it is necessary to prevent the water valve from freezing based on the duration that the target anti-freeze terminal device is closed and the set anti-freeze duration.

[0007] In some embodiments, the anti-freeze time is set according to the range of the outdoor ambient temperature, including: judging the range of the outdoor ambient temperature, including a first temperature range, a second temperature range, and a third temperature range; if the outdoor ambient temperature is in the first temperature range, a preset first time is determined as the set anti-freeze time; if the outdoor ambient temperature is in the second temperature range, a preset second time is determined as the set anti-freeze time; if the outdoor ambient temperature is in the third temperature range, a preset third time is determined as the set anti-freeze time; wherein, the first temperature range>the second temperature range>the third temperature range, and the preset first time>the preset second time>the preset third time.

[0008] In some embodiments, determining whether it is necessary to prevent the water valve from freezing is based on the duration that the target anti-freeze terminal device is closed and the set anti-freeze duration, including: judging the relationship between the duration that the target anti-freeze terminal device is closed and the set anti-freeze duration; if the duration that the target anti-freeze terminal device is closed is greater than or equal to the set anti-freeze duration, determining that it is necessary to prevent the water valve from freezing; if the duration that the target anti-freeze terminal device is closed is less than the set anti-freeze duration, determining that it is not necessary to prevent the water valve from freezing.

[0009] In some embodiments, it also includes: when opening the water valve and the water pump, first open the water valve, and then open the water pump after a preset first time; when closing the water valve and the water pump, first close the water pump, and then close the water valve after a preset second time, and the preset first time is less than the preset second time.

[0010] Matching the above method, the present invention provides a control device for an air conditioner on the other hand, the air conditioner includes at least one terminal device; the at least one terminal device includes a target anti-freeze terminal device; the target anti-freeze terminal device is connected to a water valve and a water pump through a pipeline; the water valve is used to control the on and off of the water flow, and the water pump is used to control the flow of water; the valve is arranged on the outdoor side; the control device includes: an acquisition unit, configured to acquire the outdoor ambient temperature and the duration of the target anti-freeze terminal device being closed when the air conditioner is running in heating mode and the target anti-freeze terminal device is closed; a control unit, configured to determine whether it is necessary to prevent the water valve from freezing based on the outdoor ambient temperature and the duration of the target anti-freeze terminal device being closed; the control unit is further configured to open the water valve and the water pump if it is determined that the water valve needs to be prevented from freezing, and then close the water valve and the water pump after the opening duration of the water valve and the water pump reaches a preset operating duration.

[0011] In some embodiments, the control unit determines whether it is necessary to prevent the water valve from freezing based on the outdoor ambient temperature and the duration that the target anti-freeze terminal device is closed, including: judging the relationship between the outdoor ambient temperature and a preset anti-freeze temperature; if the outdoor ambient temperature is greater than or equal to the preset anti-freeze temperature, determining that it is not necessary to prevent the water valve from freezing; if the outdoor ambient temperature is less than the preset anti-freeze temperature, determining a set anti-freeze duration based on the range of the outdoor ambient temperature, and then determining whether it is necessary to prevent the water valve from freezing based on the duration that the target anti-freeze terminal device is closed and the set anti-freeze duration.

[0012] In some embodiments, the control unit determines the set anti-freeze time according to the range of the outdoor ambient temperature, including: judging the range of the outdoor ambient temperature, including a first temperature range, a second temperature range, and a third temperature range; if the outdoor ambient temperature is in the first temperature range, a preset first time is determined as the set anti-freeze time; if the outdoor ambient temperature is in the second temperature range, a preset second time is determined as the set anti-freeze time; if the outdoor ambient temperature is in the third temperature range, a preset third time is determined as the set anti-freeze time; wherein, the first temperature range>the second temperature range>the third temperature range, and the preset first time is>the preset second time is>the preset third time.

[0013] In some embodiments, the control unit determines whether it is necessary to prevent the water valve from freezing based on the duration that the target anti-freeze terminal device is closed and the set anti-freeze time, including: judging the relationship between the duration that the target anti-freeze terminal device is closed and the set anti-freeze time; if the duration that the target anti-freeze terminal device is closed is greater than or equal to the set anti-freeze time, determining that it is necessary to prevent the water valve from freezing; if the duration that the target anti-freeze terminal device is closed is less than the set anti-freeze time, determining that it is not necessary to prevent the water valve from freezing.

[0014] In some embodiments, the control unit is further configured to, when opening the water valve and the water pump, first open the water valve, and then open the water pump after a preset first time; when closing the water valve and the water pump, first close the water pump, and then close the water valve after a preset second time, and the preset first time is less than the preset second time.

[0015] Matching the above device, the present invention provides an air conditioner on another aspect, including: the control device of the air conditioner mentioned above.

[0016] In accordance with the above method, the present invention provides a storage medium on another aspect, wherein the storage medium includes a stored program, wherein when the program is running, the device where the storage medium is located is controlled to execute the above-mentioned air conditioning control method.

[0017] In accordance with the above method, the present invention provides a computer program product on another aspect, wherein the computer program product includes a computer program, and when the computer program product is processed and executed, the steps of the above air conditioner control method are implemented.

[0018] The solution of the present invention determines whether it is necessary to prevent the water valve at the terminal device from freezing according to the outdoor ambient temperature and the duration of the terminal device being closed when the air conditioner is in heating operation and the terminal device is closed; if it is determined that it is necessary to prevent the water valve from freezing, the water valve and water pump at the terminal device are opened, and then the water valve and water pump are closed after the opening duration of the water valve and water pump reaches a preset operating duration. Thus, by determining whether it is necessary to prevent the water valve from freezing according to the outdoor ambient temperature and the duration of the terminal device being closed, the accuracy of the anti-freezing control is improved, the water valve is prevented from freezing, and the stability of the air conditioner is improved.

[0019] Other features and advantages of the present invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the present invention.

[0020] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1A schematic diagram of a flow chart of an embodiment of a method for controlling an air conditioner of the present invention;

[0022] Figure 2 A schematic structural diagram of an embodiment of a control device for an air conditioner of the present invention;

[0023] Figure 3 is a system structure diagram of the air conditioner of the present invention;

[0024] Figure 4 The figure is a flow chart of a control method for preventing a water valve from freezing according to the present invention.

[0025] In conjunction with the accompanying drawings, the reference numerals in the embodiments of the present invention are as follows:

[0026] 1-outlet water temperature sensing package; 2-gas-liquid separator; 3-tube heat exchanger; 4-water pump; 5-fin heat exchanger; 6-flash evaporator; 7-compressor; 8-electronic expansion valve; 9-communication line; 10-four-way reversing valve; 11-inlet water temperature sensing package; 12-temperature controller; 13-unit control unit; 14-low pressure sensor; 15-water valve; 16-main terminal; 102-acquisition unit; 104-control unit. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0028] In low-temperature areas in the north, air source heat pumps and other units with water systems will face freezing problems. The anti-freeze measures of most units are triggered only when the unit is shut down or in standby mode. For air source heat pumps, there are multiple terminals, including: floor heating terminal, radiator terminal, fan coil terminal, etc. If the user only uses one terminal when the unit is running, the other terminals are at risk of freezing. Among them, the fan coil terminal requires air and water for heat exchange, and the noise is relatively large compared to other terminals. The water valve at the fan coil terminal is usually installed outdoors, and anti-freeze measures need to be taken during low temperatures in winter.

[0029] Therefore, the present invention provides a control method for an air conditioner, which can take anti-freezing measures at the terminal without stopping the air conditioner and draining the water in the water system, so as to avoid freezing of the water pipes and valves at the terminal and ensure stable operation of the air conditioner.

[0030] According to an embodiment of the present invention, a control method for an air conditioner is provided, wherein the air conditioner includes at least one terminal device, such as Figure 3 The fan coil terminal and floor heating terminal in the at least one terminal device include a target anti-freezing terminal device such as a fan coil terminal; the target anti-freezing terminal device is connected to a water valve and a water pump through a pipeline; the water valve is used to control the on and off of the water flow, and the water pump is used to control the flow of water; the target anti-freezing terminal device is arranged on the indoor side, and the valve is arranged on the outdoor side, such as Figure 3 The water valve 15 in.

[0031] The target terminal device is not limited to the fan coil terminal, but can also be other terminals where water valves and water pipes may freeze. Since the water valves at the fan coil terminals are usually installed outdoors, the water valves are more likely to be damaged by freezing of water in the water pipes. Figure 3 As shown, the air conditioner includes a heat pump system and a water side system. The refrigerant in the heat pump system exchanges heat with the water in the water side system in the shell and tube heat exchanger 3, thereby providing hot water or cold water for users.

[0032] The heat pump system is located on the outdoor side. When the air conditioner is running in the heating mode, in the heat pump system, the high-temperature and high-pressure refrigerant discharged from the compressor 7 passes through the four-way reversing valve 10 and enters the shell and tube heat exchanger 3 to exchange heat with water. After that, the refrigerant passes through the electronic expansion valve 8, the flash evaporator 6, the fin heat exchanger 5, the four-way reversing valve 10, and the gas-liquid separator 2 in sequence and returns to the compressor 7. When the air conditioner is running in the cooling mode, the high-temperature and high-pressure refrigerant discharged from the compressor 7 passes through the four-way reversing valve 10, the fin heat exchanger 5, the flash evaporator 6, the electronic expansion valve 8, the shell and tube heat exchanger 3, the four-way reversing valve 10, and the gas-liquid separator 2 in sequence and returns to the compressor 7. The outlet water temperature sensing package 1 is used to detect the outlet water temperature of the shell and tube heat exchanger 3, the inlet water temperature sensing package 11 is used to detect the inlet water temperature of the shell and tube heat exchanger, the low-pressure pressure sensor is used to detect the pressure on the inlet side of the compressor, the thermostat 12 and the unit control unit 13 are used to control the operating state and operating parameters of the air conditioner, and the communication line 9 is used to transmit signals.

[0033] The water side system includes the floor heating terminal and the fan coil terminal, which are located on the indoor side. The water pipes where the floor heating terminal is located and the water pipes where the fan coil terminal is located are both provided with corresponding water valves and water pumps. When the water valves and water pumps are turned on, the water flows through the floor heating terminal and the fan coil terminal respectively to provide heat or cold for the room. Among them, since the fan coil terminal will generate noise, the water valve 15 and water pump 4 at the fan coil terminal are set on the outdoor side. When the fan coil terminal is working, hot water continues to circulate in the pipeline, and the water valve will not freeze. When the fan coil terminal is not working, the water flow in the pipeline where the water valve 15 and the water pump 4 are located is in a static state, and the water temperature continues to drop to the outdoor temperature. At this time, if the outdoor temperature is too low, the water in the pipeline will freeze, which will cause the pipeline to freeze and crack and the water valve 15 to freeze, so it is necessary to perform anti-freezing treatment on the water valve 15.

[0034] like Figure 1 The flowchart of an embodiment of the method of the present invention is shown in FIG. The air conditioner control method may include: steps S110 to S130.

[0035] In step S110 , when the air conditioner is in heating operation and the target antifreeze terminal device is turned off, the outdoor environment temperature and the duration of the turn-off of the target antifreeze terminal device are acquired.

[0036] When the air conditioner is running in heating mode and the fan coil terminal is closed, the outdoor temperature is low and the water in the fan coil terminal pipe does not flow. The pipe is more likely to freeze and cause the water valve to freeze. Therefore, the control logic to prevent the water valve from freezing is triggered at this time to determine whether to prevent the water valve from freezing.

[0037] In step S120 , it is determined whether it is necessary to prevent the water valve from freezing according to the outdoor ambient temperature and the duration of the closure of the target anti-freezing terminal device.

[0038] In some embodiments, in step S120, the specific process of determining whether it is necessary to prevent the water valve from freezing according to the outdoor ambient temperature and the duration of the closure of the target anti-freezing terminal device includes: steps S210 to S230.

[0039] Step S210, determining the magnitude relationship between the outdoor environment temperature and a preset anti-freezing temperature.

[0040] Step S220: If the outdoor ambient temperature is greater than or equal to the preset anti-freezing temperature, it is determined that it is not necessary to prevent the water valve from freezing.

[0041] Since the water valve is set on the outdoor side, the outdoor ambient temperature has a direct impact on whether the water valve freezes. The preset anti-freeze temperature is used to determine whether the pipe will freeze when the fan coil terminal is not working, and can be set to 2°C. When the outdoor ambient temperature is ≥2°C, it is considered that the pipe will not freeze and the water valve will not freeze.

[0042] Step S230, if the outdoor ambient temperature is lower than the preset anti-freeze temperature, the anti-freeze time is set according to the range of the outdoor ambient temperature, and then whether it is necessary to prevent the water valve from freezing is determined according to the duration of the target anti-freeze terminal device being closed and the set anti-freeze time.

[0043] When the outdoor ambient temperature is less than 2°C, it is considered that the pipeline may freeze. At this time, it is necessary to determine whether the water valve is about to freeze in combination with the length of time the fan coil terminal is closed. Specifically, the longer the fan coil terminal is closed, the more obvious the water in the pipeline where the water valve is located will cool down, the water temperature will be closer to the outdoor temperature, and the water will be more likely to freeze, causing the water valve to freeze. The lower the outdoor ambient temperature, the greater the cooling rate of the water in the pipeline where the water valve is located, and the water will be more likely to freeze, causing the water valve to freeze. Therefore, first determine the set anti-freeze time corresponding to the current outdoor ambient temperature, and then determine whether it is necessary to prevent the water valve from freezing based on the relationship between the length of time the fan coil terminal is closed and the set anti-freeze time.

[0044] In some embodiments, in step S230, the specific process of determining the set anti-freeze time according to the range of the outdoor ambient temperature includes: judging the range of the outdoor ambient temperature, including a first temperature range, a second temperature range, and a third temperature range; if the outdoor ambient temperature is in the first temperature range, a preset first time is determined as the set anti-freeze time; if the outdoor ambient temperature is in the second temperature range, a preset second time is determined as the set anti-freeze time; if the outdoor ambient temperature is in the third temperature range, a preset third time is determined as the set anti-freeze time; wherein, the first temperature range>the second temperature range>the third temperature range, and the preset first time is>the preset second time is>the preset third time.

[0045] The lower the outdoor ambient temperature, the faster the water in the water pipe freezes. Therefore, when setting the anti-freeze time, the anti-freeze time is set to decrease as the outdoor ambient temperature decreases. For example, the first temperature range can be set to -10℃~1℃, the second temperature range can be set to -19℃~-11℃, and the third temperature range can be set to a range less than -20℃. Correspondingly, the preset first time can be set to 3 minutes, the preset second time can be set to 2.5 minutes, and the preset first time can be set to 2 minutes.

[0046] In some embodiments, in step S230, the specific process of determining whether it is necessary to prevent the water valve from freezing based on the duration that the target anti-freeze terminal device is closed and the set anti-freeze duration includes: judging the relationship between the duration that the target anti-freeze terminal device is closed and the set anti-freeze duration; if the duration that the target anti-freeze terminal device is closed is greater than or equal to the set anti-freeze duration, determining that it is necessary to prevent the water valve from freezing; if the duration that the target anti-freeze terminal device is closed is less than the set anti-freeze duration, determining that it is not necessary to prevent the water valve from freezing.

[0047] After the anti-freeze time is set according to the outdoor ambient temperature, if the fan coil terminal is closed for a period of time ≥ the set anti-freeze time, the fan coil terminal is closed for a long enough time to cool the water in the pipe and freeze. At this time, the water valve needs to be anti-freeze treated. If the fan coil terminal is closed for a period of time < the set anti-freeze time, it is considered that the water in the pipe has not frozen and no anti-freeze treatment is required.

[0048] By judging whether it is necessary to prevent the water valve from freezing based on the outdoor ambient temperature and the length of time the fan coil terminal is closed, the accuracy of anti-freeze control is improved and freezing of water valves and pipes is avoided.

[0049] At step S130, if it is determined that the water valve needs to be prevented from freezing, the water valve and the water pump are opened, and then after the opening time of the water valve and the water pump reaches the preset operating time, the water valve and the water pump are closed, and the closing time of the terminal device is reset.

[0050] After it is determined that the water valve needs to be prevented from freezing, the water valve and water pump are turned on to circulate the water in the pipe where the water valve is located. The water with a lower temperature in the pipe exchanges heat with the water with a higher temperature in the system to increase the water temperature and prevent the water from freezing. At the same time, the higher temperature water can increase the temperature of the pipe and the water valve when circulating in the pipe, slowing down the speed at which the water in the pipe freezes.

[0051] After the water valve and water pump are turned on, the fan coil end is still in a closed state, the air in the fan coil end does not flow, and no heating is provided to the user. The preset operation time can be set to 1 minute. Optionally, the preset operation time can also be determined according to the outdoor ambient temperature. For example, the lower the outdoor ambient temperature, the longer the preset operation time, and the higher the outdoor ambient temperature, the shorter the preset operation time.

[0052] In some embodiments, when opening the water valve and the water pump, the water valve is opened first, and the water pump is opened after a preset first time; when closing the water valve and the water pump, the water pump is closed first, and the water valve is closed after a preset second time, and the preset first time is less than the preset second time.

[0053] In order to reduce the resistance when the water pump starts and protect the water pump and the pipeline system, when opening the water valve and the water pump, you need to open the water valve first, and then turn on the water pump after a period of time. The preset first time can be set to 15s. Opening the water valve before starting the water pump can reduce the resistance at the water pump inlet. If the water valve is not opened, the water pump needs to overcome the large inlet resistance before it can start to absorb water, which will cause the water pump to overload and may even damage the water pump. After opening the water valve first, water can start to flow and flush the pipes, which helps the water pump to start more smoothly and reduce the impact caused by sudden start.

[0054] When you want to close the water valve and water pump, if you close the water valve directly without turning off the water pump first, the water flow may form a reverse shock wave on the impeller of the water pump, which will cause huge pressure on the impeller and damage the water pump. Therefore, you need to turn off the water pump first and then close the water valve. The preset second time can be set to 1 minute.

[0055] Figure 4 FIG. 1 is a flow chart of a control method for preventing a water valve from freezing according to the present invention. Figure 4 As shown, the method includes:

[0056] Step 1: After the air conditioner is turned on, set the heating mode and do not use the fan coil terminal. At this time, detect the outdoor ambient temperature T. If T>2℃, no anti-freezing measures are required; if T≤2℃, proceed to step 2.

[0057] Step 2, determine the range of T. If -10℃≤T≤1℃, start calculating the time t when the fan terminal signal is disconnected. If t≥t1, execute step 3, otherwise recalculate the time t when the fan terminal signal is disconnected; if -19℃≤T≤-11℃, start calculating the time t when the fan terminal signal is disconnected. If t≥t2, execute step 3, otherwise recalculate the time t when the fan terminal signal is disconnected; if T≤-20℃, start calculating the time t when the fan terminal signal is disconnected. If t≥t3, execute step 3, otherwise recalculate the time t when the fan terminal signal is disconnected. Among them, t1>t2>t3.

[0058] Step 3, open the water valve at the end of the fan coil unit, and then open the water pump at the end of the fan coil unit after 15 seconds. After the water pump is turned on, turn it off after running for Tw time, and then close the water valve after 1 minute.

[0059] By adopting the technical solution of this embodiment, when the air conditioner is running in heating mode and the terminal device is turned off, it is determined whether it is necessary to prevent the water valve at the terminal device from freezing according to the outdoor ambient temperature and the duration of the terminal device being turned off; if it is determined that it is necessary to prevent the water valve from freezing, the water valve and water pump at the terminal device are opened, and then the water valve and water pump are closed after the opening time of the water valve and water pump reaches the preset operation time. Thus, by determining whether it is necessary to prevent the water valve from freezing according to the outdoor ambient temperature and the duration of the terminal device being turned off, the accuracy of the anti-freezing control is improved, the water valve is prevented from freezing, and the stability of the air conditioner is improved.

[0060] According to an embodiment of the present invention, a control device for an air conditioner corresponding to the control method for an air conditioner is also provided. The air conditioner includes at least one terminal device, such as Figure 3The fan coil terminal and floor heating terminal in the at least one terminal device include a target anti-freezing terminal device such as a fan coil terminal; the target anti-freezing terminal device is connected to a water valve and a water pump through a pipeline; the water valve is used to control the on-off of the water flow, and the water pump is used to control the flow of water; the target anti-freezing terminal device is arranged on the indoor side, and the valve is arranged on the outdoor side, such as Figure 3 The water valve 15 in.

[0061] The target terminal device is not limited to the fan coil terminal, but can also be other terminals where water valves and water pipes may freeze. Since the water valves at the fan coil terminals are usually installed outdoors, the water valves are more likely to be damaged by freezing of water in the water pipes. Figure 3 As shown, the air conditioner includes a heat pump system and a water side system. The refrigerant in the heat pump system exchanges heat with the water in the water side system in the shell and tube heat exchanger 3, thereby providing hot water or cold water for users.

[0062] The heat pump system is located on the outdoor side. When the air conditioner is running in the heating mode, in the heat pump system, the high-temperature and high-pressure refrigerant discharged from the compressor 7 passes through the four-way reversing valve 10 and enters the shell and tube heat exchanger 3 to exchange heat with water. After that, the refrigerant passes through the electronic expansion valve 8, the flash evaporator 6, the fin heat exchanger 5, the four-way reversing valve 10, and the gas-liquid separator 2 in sequence and returns to the compressor 7. When the air conditioner is running in the cooling mode, the high-temperature and high-pressure refrigerant discharged from the compressor 7 passes through the four-way reversing valve 10, the fin heat exchanger 5, the flash evaporator 6, the electronic expansion valve 8, the shell and tube heat exchanger 3, the four-way reversing valve 10, and the gas-liquid separator 2 in sequence and returns to the compressor 7. The outlet water temperature sensing package 1 is used to detect the outlet water temperature of the shell and tube heat exchanger 3, the inlet water temperature sensing package 11 is used to detect the inlet water temperature of the shell and tube heat exchanger, the low-pressure pressure sensor is used to detect the pressure on the inlet side of the compressor, the thermostat 12 and the unit control unit 13 are used to control the operating state and operating parameters of the air conditioner, and the communication line 9 is used to transmit signals.

[0063] The water side system includes the floor heating terminal and the fan coil terminal, which are located on the indoor side. The water pipes where the floor heating terminal is located and the water pipes where the fan coil terminal is located are both provided with corresponding water valves and water pumps. When the water valves and water pumps are turned on, the water flows through the floor heating terminal and the fan coil terminal respectively to provide heat or cold for the room. Among them, since the fan coil terminal will generate noise, the water valve 15 and water pump 4 at the fan coil terminal are set on the outdoor side. When the fan coil terminal is working, hot water continues to circulate in the pipeline, and the water valve will not freeze. When the fan coil terminal is not working, the water flow in the pipeline where the water valve 15 and the water pump 4 are located is in a static state, and the water temperature continues to drop to the outdoor temperature. At this time, if the outdoor temperature is too low, the water in the pipeline will freeze, which will cause the pipeline to freeze and crack and the water valve 15 to freeze, so it is necessary to perform anti-freezing treatment on the water valve 15.

[0064] See also Figure 2 The schematic diagram of the structure of an embodiment of the device of the present invention is shown. The control device of the air conditioner may include: an acquisition unit 102 and a control unit 104.

[0065] The acquisition unit 102 is configured to acquire the outdoor environment temperature and the duration of the target antifreeze terminal device being turned off when the air conditioner is operating in heating mode and the target antifreeze terminal device is turned off.

[0066] When the air conditioner is running in heating mode and the fan coil terminal is closed, the outdoor temperature is low and the water in the fan coil terminal pipe does not flow. The pipe is more likely to freeze and cause the water valve to freeze. Therefore, the control logic to prevent the water valve from freezing is triggered at this time to determine whether to prevent the water valve from freezing.

[0067] The control unit 104 is configured to determine whether it is necessary to prevent the water valve from freezing according to the outdoor environment temperature and the duration of the closure of the target anti-freezing terminal device.

[0068] In some implementations, the control unit 104 determines, according to the outdoor ambient temperature and the duration of the target anti-freezing terminal device being closed, whether it is necessary to prevent the water valve from freezing, including:

[0069] The control unit 104 is further configured to determine the magnitude relationship between the outdoor ambient temperature and the preset anti-freezing temperature.

[0070] The control unit 104 is further specifically configured to determine that it is not necessary to prevent the water valve from freezing if the outdoor ambient temperature is greater than or equal to a preset anti-freezing temperature.

[0071] Since the water valve is set on the outdoor side, the outdoor ambient temperature has a direct impact on whether the water valve freezes. The preset anti-freeze temperature is used to determine whether the pipe will freeze when the fan coil terminal is not working, and can be set to 2°C. When the outdoor ambient temperature is ≥2°C, it is considered that the pipe will not freeze and the water valve will not freeze.

[0072] The control unit 104 is also specifically configured to determine the set anti-freeze time according to the range of the outdoor ambient temperature if the outdoor ambient temperature is lower than the preset anti-freeze temperature, and then determine whether it is necessary to prevent the water valve from freezing according to the duration of the target anti-freeze terminal device being closed and the set anti-freeze time.

[0073] When the outdoor ambient temperature is less than 2°C, it is considered that the pipeline may freeze. At this time, it is necessary to determine whether the water valve is about to freeze in combination with the length of time the fan coil terminal is closed. Specifically, the longer the fan coil terminal is closed, the more obvious the water in the pipeline where the water valve is located will cool down, the water temperature will be closer to the outdoor temperature, and the water will be more likely to freeze, causing the water valve to freeze. The lower the outdoor ambient temperature, the greater the cooling rate of the water in the pipeline where the water valve is located, and the water will be more likely to freeze, causing the water valve to freeze. Therefore, first determine the set anti-freeze time corresponding to the current outdoor ambient temperature, and then determine whether it is necessary to prevent the water valve from freezing based on the relationship between the length of time the fan coil terminal is closed and the set anti-freeze time.

[0074] In some embodiments, the control unit 104 determines the specific process of setting the anti-freeze time according to the range of the outdoor ambient temperature, including: judging the range of the outdoor ambient temperature, including a first temperature range, a second temperature range, and a third temperature range; if the outdoor ambient temperature is in the first temperature range, a preset first time is determined as the set anti-freeze time; if the outdoor ambient temperature is in the second temperature range, a preset second time is determined as the set anti-freeze time; if the outdoor ambient temperature is in the third temperature range, a preset third time is determined as the set anti-freeze time; wherein, the first temperature range>the second temperature range>the third temperature range, and the preset first time is>the preset second time is>the preset third time.

[0075] The lower the outdoor ambient temperature, the faster the water in the water pipe freezes. Therefore, when setting the anti-freeze time, the anti-freeze time is set to decrease as the outdoor ambient temperature decreases. For example, the first temperature range can be set to -10℃~1℃, the second temperature range can be set to -19℃~-11℃, and the third temperature range can be set to a range less than -20℃. Correspondingly, the preset first time can be set to 3 minutes, the preset second time can be set to 2.5 minutes, and the preset first time can be set to 2 minutes.

[0076] In some embodiments, the control unit 104 determines whether it is necessary to prevent the water valve from freezing based on the duration of the target anti-freeze terminal device being closed and the set anti-freeze time, and the specific process includes: judging the relationship between the duration of the target anti-freeze terminal device being closed and the set anti-freeze time; if the duration of the target anti-freeze terminal device being closed is greater than or equal to the set anti-freeze time, determining that it is necessary to prevent the water valve from freezing; if the duration of the target anti-freeze terminal device being closed is less than the set anti-freeze time, determining that it is not necessary to prevent the water valve from freezing.

[0077] After the anti-freeze time is set according to the outdoor ambient temperature, if the fan coil terminal is closed for a period of time ≥ the set anti-freeze time, the fan coil terminal is closed for a long enough time to cool the water in the pipe and freeze. At this time, the water valve needs to be anti-freeze treated. If the fan coil terminal is closed for a period of time < the set anti-freeze time, it is considered that the water in the pipe has not frozen and no anti-freeze treatment is required.

[0078] By judging whether it is necessary to prevent the water valve from freezing based on the outdoor ambient temperature and the length of time the fan coil terminal is closed, the accuracy of anti-freeze control is improved and freezing of water valves and pipes is avoided.

[0079] The control unit 104 is further configured to open the water valve and the water pump if it is determined that the water valve needs to be prevented from freezing, and then close the water valve and the water pump after the opening time of the water valve and the water pump reaches a preset operating time.

[0080] After it is determined that the water valve needs to be prevented from freezing, the water valve and water pump are turned on to circulate the water in the pipe where the water valve is located. The water with a lower temperature in the pipe exchanges heat with the water with a higher temperature in the system to increase the water temperature and prevent the water from freezing. At the same time, the higher temperature water can increase the temperature of the pipe and the water valve when circulating in the pipe, slowing down the speed at which the water in the pipe freezes.

[0081] After the water valve and water pump are turned on, the fan coil end is still in a closed state, the air in the fan coil end does not flow, and no heating is provided to the user. The preset operation time can be set to 1 minute. Optionally, the preset operation time can also be determined according to the outdoor ambient temperature. For example, the lower the outdoor ambient temperature, the longer the preset operation time, and the higher the outdoor ambient temperature, the shorter the preset operation time.

[0082] In some embodiments, the control unit 104 opens the water valve first and then opens the water pump after a preset first time when opening the water valve and the water pump; and closes the water pump first and then closes the water valve after a preset second time when closing the water valve and the water pump, and the preset first time is less than the preset second time.

[0083] In order to reduce the resistance when the water pump starts and protect the water pump and the pipeline system, when opening the water valve and the water pump, you need to open the water valve first, and then turn on the water pump after a period of time. The preset first time can be set to 15s. Opening the water valve before starting the water pump can reduce the resistance at the water pump inlet. If the water valve is not opened, the water pump needs to overcome the large inlet resistance before it can start to absorb water, which will cause the water pump to overload and may even damage the water pump. After opening the water valve first, water can start to flow and flush the pipes, which helps the water pump to start more smoothly and reduce the impact caused by sudden start.

[0084] When you want to close the water valve and water pump, if you close the water valve directly without turning off the water pump first, the water flow may form a reverse shock wave on the impeller of the water pump, which will cause huge pressure on the impeller and damage the water pump. Therefore, you need to turn off the water pump first and then close the water valve. The preset second time can be set to 1 minute.

[0085] Figure 4 FIG. 1 is a flow chart of a control method for preventing a water valve from freezing according to the present invention. Figure 4 As shown, the method includes:

[0086] Step 1: After the air conditioner is turned on, set the heating mode and do not use the fan coil terminal. At this time, detect the outdoor ambient temperature T. If T>2℃, no anti-freezing measures are required; if T≤2℃, proceed to step 2.

[0087] Step 2, determine the range of T. If -10℃≤T≤1℃, start calculating the time t when the fan terminal signal is disconnected. If t≥t1, execute step 3, otherwise recalculate the time t when the fan terminal signal is disconnected; if -19℃≤T≤-11℃, start calculating the time t when the fan terminal signal is disconnected. If t≥t2, execute step 3, otherwise recalculate the time t when the fan terminal signal is disconnected; if T≤-20℃, start calculating the time t when the fan terminal signal is disconnected. If t≥t3, execute step 3, otherwise recalculate the time t when the fan terminal signal is disconnected. Among them, t1>t2>t3.

[0088] Step 3, open the water valve at the end of the fan coil unit, and then open the water pump at the end of the fan coil unit after 15 seconds. After the water pump is turned on, turn it off after running for Tw time, and then close the water valve after 1 minute.

[0089] Since the processing and functions implemented by the device of this embodiment basically correspond to the embodiments, principles and examples of the aforementioned method, for the details not fully described in this embodiment, please refer to the relevant descriptions in the aforementioned embodiments, and no further elaboration will be made here.

[0090] By adopting the technical solution of the present invention, when the air conditioner is running in heating mode and the terminal device is turned off, it is determined whether it is necessary to prevent the water valve at the terminal device from freezing according to the outdoor ambient temperature and the duration of the terminal device being turned off; if it is determined that it is necessary to prevent the water valve from freezing, the water valve and water pump at the terminal device are opened, and then the water valve and water pump are closed after the opening time of the water valve and water pump reaches the preset operation time. Thus, by determining whether it is necessary to prevent the water valve from freezing according to the outdoor ambient temperature and the duration of the terminal device being turned off, the accuracy of the anti-freeze control is improved, the water valve is prevented from freezing, and the stability of the air conditioner is improved.

[0091] According to an embodiment of the present invention, an air conditioner corresponding to the control device of the air conditioner is also provided. The air conditioner may include: the control device of the air conditioner described above.

[0092] Since the processing and functions implemented by the air conditioner of this embodiment basically correspond to the embodiments, principles and examples of the aforementioned devices, for the details not fully described in this embodiment, please refer to the relevant descriptions in the aforementioned embodiments and will not be repeated here.

[0093] By adopting the technical solution of the present invention, when the air conditioner is running in heating mode and the terminal device is turned off, it is determined whether it is necessary to prevent the water valve at the terminal device from freezing according to the outdoor ambient temperature and the duration of the terminal device being turned off; if it is determined that it is necessary to prevent the water valve from freezing, the water valve and water pump at the terminal device are opened, and then the water valve and water pump are closed after the opening time of the water valve and water pump reaches the preset operation time. Thus, by determining whether it is necessary to prevent the water valve from freezing according to the outdoor ambient temperature and the duration of the terminal device being turned off, the accuracy of the anti-freeze control is improved, the water valve is prevented from freezing, and the stability of the air conditioner is improved.

[0094] According to an embodiment of the present invention, a storage medium corresponding to the air conditioner control method is also provided, wherein the storage medium includes a stored program, wherein when the program is running, the device where the storage medium is located is controlled to execute the air conditioner control method described above.

[0095] Since the processing and functions implemented by the storage medium of this embodiment basically correspond to the embodiments, principles and examples of the aforementioned method, for the details not fully described in this embodiment, please refer to the relevant descriptions in the aforementioned embodiments, and no further elaboration will be made here.

[0096] By adopting the technical solution of the present invention, when the air conditioner is running in heating mode and the terminal device is turned off, it is determined whether it is necessary to prevent the water valve at the terminal device from freezing according to the outdoor ambient temperature and the duration of the terminal device being turned off; if it is determined that it is necessary to prevent the water valve from freezing, the water valve and water pump at the terminal device are opened, and then the water valve and water pump are closed after the opening time of the water valve and water pump reaches the preset operation time. Thus, by determining whether it is necessary to prevent the water valve from freezing according to the outdoor ambient temperature and the duration of the terminal device being turned off, the accuracy of the anti-freeze control is improved, the water valve is prevented from freezing, and the stability of the air conditioner is improved.

[0097] According to an embodiment of the present invention, a computer program product corresponding to the air conditioner control method is also provided, wherein the computer program product comprises a computer program, and when the computer program product is processed and executed, the steps of the air conditioner control method are implemented.

[0098] Since the processing and functions implemented by the computer program product of this embodiment basically correspond to the embodiments, principles and examples of the aforementioned method, for the details not fully described in this embodiment, please refer to the relevant descriptions in the aforementioned embodiments and will not be repeated here.

[0099] By adopting the technical solution of the present invention, when the air conditioner is running in heating mode and the terminal device is turned off, it is determined whether it is necessary to prevent the water valve at the terminal device from freezing according to the outdoor ambient temperature and the duration of the terminal device being turned off; if it is determined that it is necessary to prevent the water valve from freezing, the water valve and water pump at the terminal device are opened, and then the water valve and water pump are closed after the opening time of the water valve and water pump reaches the preset operation time. Thus, by determining whether it is necessary to prevent the water valve from freezing according to the outdoor ambient temperature and the duration of the terminal device being turned off, the accuracy of the anti-freeze control is improved, the water valve is prevented from freezing, and the stability of the air conditioner is improved.

[0100] In summary, it is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0101] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. A method for controlling an air conditioner, characterized in that: The air conditioner comprises at least one terminal device; the at least one terminal device comprises a target anti-freezing terminal device; the target anti-freezing terminal device is connected to a water valve and a water pump through a pipeline; the water valve is used to control the on-off of the water flow, and the water pump is used to control the flow of water; the valve is arranged on the outdoor side; The method comprises: When the air conditioner is in heating operation and the target antifreeze terminal device is turned off, obtaining the outdoor environment temperature and the duration of the target antifreeze terminal device being turned off; Determining whether it is necessary to prevent the water valve from freezing according to the outdoor ambient temperature and the duration of the closure of the target anti-freezing terminal device; If it is determined that the water valve needs to be prevented from freezing, the water valve and the water pump are opened, and then after the opening time of the water valve and the water pump reaches a preset operating time, the water valve and the water pump are closed.

2. The air conditioner control method according to claim 1, characterized in that: Determining whether it is necessary to prevent the water valve from freezing according to the outdoor ambient temperature and the duration of the target anti-freezing terminal device being closed includes: Determine the magnitude relationship between the outdoor ambient temperature and the preset anti-freezing temperature; If the outdoor ambient temperature is greater than or equal to the preset anti-freezing temperature, it is determined that it is not necessary to prevent the water valve from freezing; If the outdoor ambient temperature is lower than the preset anti-freeze temperature, the anti-freeze time is set according to the range of the outdoor ambient temperature, and then it is determined whether the water valve needs to be prevented from freezing according to the duration of the target anti-freeze terminal device being closed and the set anti-freeze time.

3. The air conditioner control method according to claim 2, characterized in that: The anti-freezing time is determined and set according to the range of the outdoor ambient temperature, including: Determining the range of the outdoor ambient temperature, including a first temperature range, a second temperature range, and a third temperature range; If the outdoor ambient temperature is within the first temperature range, the preset first duration is determined as the set anti-freezing duration; If the outdoor ambient temperature is within the second temperature range, the preset second time period is determined as the set anti-freezing time period; If the outdoor ambient temperature is within a third temperature range, the preset third time period is determined as the set anti-freezing time period; Among them, the first temperature range>the second temperature range>the third temperature range, and the preset first time duration>the preset second time duration>the preset third time duration.

4. The air conditioner control method according to claim 2 or 3, characterized in that: Determining whether it is necessary to prevent the water valve from freezing according to the duration of the target anti-freezing terminal device being closed and the set anti-freezing duration includes: Determine the magnitude relationship between the duration of closing the target anti-freezing terminal device and the set anti-freezing duration; If the duration of the closing of the target anti-freezing terminal device is greater than or equal to the set anti-freezing duration, it is determined that the water valve needs to be prevented from freezing; If the duration of the closing of the target anti-freezing terminal device is less than the set anti-freezing duration, it is determined that it is not necessary to prevent the water valve from freezing.

5. The air conditioner control method according to any one of claims 1 to 3, characterized in that: Also includes: When opening the water valve and the water pump, the water valve is opened first, and then the water pump is opened after a preset first time; When closing the water valve and the water pump, the water pump is closed first, and then the water valve is closed after the preset second time, and the preset first time is less than the preset second time.

6. A control device for an air conditioner, characterized in that: The air conditioner has a terminal device; a water valve and a water pump are arranged at the terminal device; the water valve is used to control the on and off of the water flow through the terminal device; The control device comprises: an acquisition unit, configured to acquire the outdoor environment temperature and the duration of closing of the target antifreeze terminal device when the air conditioner is in heating operation and the target antifreeze terminal device is closed; a control unit configured to determine whether it is necessary to prevent the water valve from freezing according to the outdoor ambient temperature and the duration of the closure of the target anti-freezing terminal device; The control unit is further configured to open the water valve and the water pump if it is determined that the water valve needs to be prevented from freezing, and then close the water valve and the water pump after the opening time of the water valve and the water pump reaches a preset operating time.

7. The air conditioner control device according to claim 6, characterized in that: The control unit determines whether it is necessary to prevent the water valve from freezing according to the outdoor ambient temperature and the duration of the target anti-freezing terminal device being closed, including: Determine the magnitude relationship between the outdoor ambient temperature and the preset anti-freezing temperature; If the outdoor ambient temperature is greater than or equal to the preset anti-freezing temperature, it is determined that it is not necessary to prevent the water valve from freezing; If the outdoor ambient temperature is lower than the preset anti-freeze temperature, the anti-freeze time is set according to the range of the outdoor ambient temperature, and then it is determined whether the water valve needs to be prevented from freezing according to the duration of the target anti-freeze terminal device being closed and the set anti-freeze time.

8. An air conditioner, characterized in that: include: The air conditioner control device as claimed in claim 6 or 7.

9. A storage medium, characterized in that: The storage medium includes a stored program, wherein when the program is executed, the device where the storage medium is located is controlled to execute the air conditioner control method according to any one of claims 1 to 5.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 5 are implemented.

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