Anti-freezing equipment control method and system

Abstract

According to the anti-freezing equipment control method and system, whether a freezing risk exists in a water chilling unit or not can be intelligently recognized according to the environment temperature and the air suction saturation temperature, an anti-freezing water pump can be started for freezing prevention under the condition that it is determined that the freezing risk exists, and then the chilled water outlet temperature can be detected; whether the freezing risk still exists in the water chilling unit or not can be intelligently recognized according to the chilled water outlet temperature, the anti-freezing electric heater can be started under the condition that it is determined that the freezing risk still exists, and the anti-freezing electric heater does not need to be started under the condition that it is determined that the freezing risk does not exist; the anti-freezing effect is further enhanced, the freezing risk of the water chilling unit is avoided, and the energy consumption problem caused by unnecessary starting of the anti-freezing electric heater can be effectively avoided. Intelligent control over the anti-freezing water pump and the anti-freezing electric heater can be effectively achieved, and therefore intelligent anti-freezing is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of chiller control, and in particular to an antifreeze equipment control method and system. Background Art

[0002] With the development of science and technology, the operation control technology of chillers is constantly improving.

[0003] In low temperature environments, the pipes and related equipment of the chiller may freeze, affecting the normal operation and performance of the chiller.

[0004] Currently, antifreeze equipment is installed in the chiller. Users can manually determine whether the chiller has a freezing risk and control the operating state of the antifreeze equipment accordingly to avoid the freezing risk of the chiller.

[0005] However, the control of the operating status of the antifreeze equipment relies on manual work, and the level of intelligent control is low, so intelligent antifreeze cannot be effectively realized. Summary of the invention

[0006] The present application provides an antifreeze equipment control method and system, which are used to solve the problem that the control of the operating status of the antifreeze equipment in the prior art relies on manual operation and the level of intelligent control is low, and effectively realize the intelligent control of the antifreeze equipment.

[0007] The present application provides an antifreeze equipment control method, comprising:

[0008] Check the operating status of the chiller;

[0009] When it is determined that the chiller is in a shutdown state, if the first ambient temperature is lower than a preset first ambient temperature threshold, or the first suction saturation temperature is lower than a preset first saturation temperature threshold, then starting the antifreeze water pump;

[0010] Detecting the chilled water outlet temperature and using it as the first chilled water outlet temperature;

[0011] The operating state of the antifreeze electric heater is controlled according to the first chilled water outlet temperature.

[0012] Optionally, controlling the operating state of the antifreeze electric heater according to the first chilled water outlet temperature includes:

[0013] Determine whether the first chilled water outlet temperature is less than a preset first water outlet temperature threshold, and obtain a determination result;

[0014] According to the judgment result, the operation state of the antifreeze electric heater is controlled.

[0015] Optionally, controlling the operating state of the antifreeze electric heater according to the judgment result includes:

[0016] When it is determined that the first chilled water outlet temperature is lower than the first outlet temperature threshold, turning on the antifreeze electric heater;

[0017] Detecting the chilled water outlet temperature and using it as the second chilled water outlet temperature;

[0018] The operating state of the antifreeze electric heater is controlled according to the second chilled water outlet temperature.

[0019] Optionally, controlling the operating state of the antifreeze electric heater according to the second chilled water outlet temperature includes:

[0020] When it is determined that the second chilled water outlet temperature is not less than a preset second water outlet temperature threshold, turning off the antifreeze electric heater;

[0021] When it is determined that the second chilled water outlet temperature is less than the second chilled water outlet temperature threshold, continue to detect the chilled water outlet temperature until it is detected that the chilled water outlet temperature is not less than the second chilled water outlet temperature threshold;

[0022] After detecting that the chilled water outlet temperature is not less than the second outlet temperature threshold, turning off the antifreeze electric heater.

[0023] Optionally, controlling the operating state of the antifreeze electric heater according to the judgment result includes:

[0024] When it is determined that the first chilled water outlet temperature is not less than the first outlet temperature threshold, detecting the evaporator refrigerant liquid level and using it as the first evaporator refrigerant liquid level;

[0025] The operating state of the antifreeze electric heater is controlled according to the refrigerant liquid level of the first evaporator.

[0026] Optionally, controlling the operating state of the antifreeze electric heater according to the refrigerant liquid level of the first evaporator includes:

[0027] When it is determined that the refrigerant liquid level of the first evaporator is not less than a preset first liquid level threshold, turning on the antifreeze electric heater;

[0028] Detect the refrigerant level of the evaporator and use it as the refrigerant level of the second evaporator;

[0029] The operating state of the antifreeze electric heater is controlled according to the refrigerant liquid level of the second evaporator.

[0030] Optionally, controlling the operating state of the antifreeze electric heater according to the refrigerant liquid level of the second evaporator includes:

[0031] When it is determined that the refrigerant liquid level of the second evaporator is less than a preset second liquid level threshold, turning off the antifreeze electric heater;

[0032] When it is determined that the refrigerant liquid level of the second evaporator is not less than the second liquid level threshold, continue to detect the refrigerant liquid level of the evaporator until it is detected that the refrigerant liquid level of the evaporator is less than the second liquid level threshold;

[0033] After detecting that the evaporator refrigerant liquid level is less than the second liquid level threshold, turning off the antifreeze electric heater.

[0034] Optionally, after turning off the antifreeze electric heater, the method further includes:

[0035] If the second ambient temperature is not less than the preset second ambient temperature threshold, and the second suction saturation temperature is not less than the preset second saturation temperature threshold, shutting down the antifreeze water pump;

[0036] If the second ambient temperature is lower than the second ambient temperature threshold, or the second suction saturation temperature is lower than the second saturation temperature threshold, the process returns to the step of detecting the chilled water outlet temperature and setting it as the first chilled water outlet temperature.

[0037] Optionally, after detecting the operating status of the chiller, the method further includes:

[0038] When it is determined that the chiller is in the on state, detecting the ambient temperature and using it as the third ambient temperature;

[0039] When it is determined that the third ambient temperature is less than a preset third ambient temperature threshold, obtaining the current time and the most recent antifreeze water pump start time;

[0040] The time obtained by subtracting the antifreeze water pump start time from the current time is determined as the target time;

[0041] The operating state of the antifreeze water pump is controlled according to the magnitude relationship between the target duration and a preset duration threshold.

[0042] The present application also proposes an antifreeze equipment control system, comprising: a first detection unit, a first opening unit, a second detection unit and a first control unit; wherein:

[0043] The first detection unit is used to detect the operating status of the chiller;

[0044] The first opening unit is used to start the antifreeze water pump if the first ambient temperature is lower than a preset first ambient temperature threshold, or the first suction saturation temperature is lower than a preset first saturation temperature threshold, when it is determined that the chiller is in a shutdown state;

[0045] The second detection unit is used to detect the chilled water outlet temperature and use it as the first chilled water outlet temperature;

[0046] The first control unit is used to control the operating state of the antifreeze electric heater according to the first chilled water outlet temperature.

[0047] The antifreeze equipment control method and system provided by the present application can intelligently identify whether there is a freezing risk for the chiller according to the ambient temperature and the suction saturation temperature, and can start the antifreeze water pump for antifreeze when it is determined that there is a freezing risk, and then detect the chilled water outlet temperature, and can intelligently identify whether there is still a freezing risk for the chiller according to the chilled water outlet temperature, and can start the antifreeze electric heater when it is determined that there is still a freezing risk, and when it is determined that there is no freezing risk, there is no need to start the antifreeze electric heater, further enhancing the antifreeze effect and avoiding the freezing risk of the chiller, and can effectively avoid the energy consumption problem caused by the unnecessary start of the antifreeze electric heater. The present application can effectively realize the intelligent control of the antifreeze water pump and the antifreeze electric heater, thereby realizing intelligent antifreeze. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0049] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0050] Figure 1 It is one of the flow charts of the antifreeze equipment control method provided in the embodiment of the present application;

[0051] Figure 2 This is the second flow chart of the antifreeze equipment control method provided in the embodiment of the present application;

[0052] Figure 3 This is the third flow chart of the antifreeze equipment control method provided in the embodiment of the present application;

[0053] Figure 4 This is the fourth flow chart of the antifreeze equipment control method provided in the embodiment of the present application;

[0054] Figure 5 This is the fifth flow chart of the antifreeze equipment control method provided in the embodiment of the present application;

[0055] Figure 6This is the sixth flow chart of the antifreeze equipment control method provided in the embodiment of the present application;

[0056] Figure 7 It is a structural schematic diagram of an antifreeze equipment control system provided in an embodiment of the present application;

[0057] Figure 8 It is a schematic diagram of the structure of the electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0058] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0059] It should be noted that the terms "first", "second", etc. in the specification of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0060] like Figure 1 As shown, the present application proposes a first antifreeze equipment control method, which may include the following steps:

[0061] S101, detecting the operating status of the chiller.

[0062] The chiller may be an air-cooled chiller or a water-cooled chiller.

[0063] Specifically, the operating state of the chiller may include a shutdown state and a startup state.

[0064] S102: When it is determined that the chiller is in a shutdown state, if the first ambient temperature is lower than a preset first ambient temperature threshold, or the first suction saturation temperature is lower than a preset first saturation temperature threshold, then start the antifreeze water pump.

[0065] It should be noted that the present application may use ambient temperature and / or suction saturation temperature to intelligently identify whether there is a risk of freezing of the chiller.

[0066] Specifically, when determining that the chiller is in a shutdown state, the present application can detect the ambient temperature and / or the suction saturation temperature. It should be noted that the suction saturation temperature is the saturation temperature corresponding to the suction pressure. The present application can detect the suction pressure and then determine the corresponding saturation temperature by the suction pressure.

[0067] Specifically, the present application may determine the detected ambient temperature as the first ambient temperature, and determine the detected intake air saturation temperature as the first intake air saturation temperature.

[0068] Among them, the first ambient temperature threshold and the first saturation temperature threshold can be pre-set by technical personnel according to actual conditions, and this application does not limit this.

[0069] Specifically, the present application can determine that there is a freezing risk of the chiller when it is determined that the first ambient temperature is less than the first ambient temperature threshold, or the first suction saturation temperature is less than the first saturation temperature threshold. At this time, the present application can start the antifreeze water pump to make the water in the overall pipeline of the chiller flow to prevent the chiller from freezing.

[0070] It should also be noted that the antifreeze water pump and the antifreeze electric heater of the present application can be arranged in a branch of the overall pipeline of the chiller, wherein the antifreeze electric heater can be arranged after the antifreeze water pump.

[0071] It is understandable that the present application may first detect one of the ambient temperature and the saturation temperature, and compare the detected ambient temperature or saturation temperature with the corresponding threshold value. If the detected ambient temperature or saturation temperature is less than the corresponding threshold value, there is no need to detect the other parameter. If the detected ambient temperature or saturation temperature is not less than the corresponding threshold value, another parameter may be detected and compared with the corresponding threshold value.

[0072] Of course, the present application can also detect the ambient temperature and the intake saturation temperature at the same time, and compare the detected ambient temperature and the intake saturation temperature with the corresponding thresholds respectively. As long as one of the parameters is less than the corresponding threshold, the antifreeze water pump can be turned on; if both parameters are not less than the corresponding threshold, it can be determined that there is no risk of freezing in the chiller, and there is no need to turn on the antifreeze water pump.

[0073] It should be noted that the present application uses two parameters, ambient temperature and suction saturation temperature, to intelligently identify whether the chiller has a freezing risk, and can start the antifreeze water pump when it is determined that there is a freezing risk, which can effectively enhance the reliability of freezing risk identification and enhance the reliability of antifreeze.

[0074] S103, detecting the chilled water outlet temperature and using it as the first chilled water outlet temperature.

[0075] Specifically, the present application can detect the chilled water outlet temperature after turning on the antifreeze water pump, and use the detected chilled water outlet temperature as the first chilled water outlet temperature.

[0076] Among them, the present application can determine whether to turn on the antifreeze electric heater based on the first cold water outlet temperature.

[0077] Optionally, the present application may delay detection of the chilled water outlet temperature after the antifreeze water pump is turned on and use the temperature as the first chilled water outlet temperature.

[0078] It is understandable that the present application detects the chilled water outlet temperature only after the antifreeze water pump has been running for a certain period of time. After ensuring that the antifreeze water pump has started to run and fully exerts its antifreeze effect (i.e., drives the water in the overall pipeline of the chiller to flow for antifreeze), the chilled water outlet temperature can be detected and determined based on the chilled water outlet temperature to determine whether the opening of the antifreeze water pump can completely avoid the freezing risk of the chiller, which is beneficial to avoid unnecessary operation of the antifreeze electric heater. Among them, the duration can be set by the technician according to the actual situation, and the present application does not limit this.

[0079] It should be noted that if the present application detects the chilled water outlet temperature when the antifreeze water pump is turned on, the chilled water outlet temperature detected may be the chilled water outlet temperature at which the antifreeze water pump has not yet started to function or has not yet fully exerted its antifreeze function. The present application controls whether the antifreeze electric heater is turned on based on the chilled water outlet temperature, which may lead to unnecessary operation of the antifreeze electric heater, thereby resulting in unnecessary consumption of related resources.

[0080] S104: Control the operating state of the antifreeze electric heater according to the first chilled water outlet temperature.

[0081] Among them, the operating state of the antifreeze electric heater can include an on state and an off state.

[0082] Optionally, if the first chilled water outlet temperature is high, the present application can control the antifreeze electric heater to remain in an off state and prohibit turning on the antifreeze electric heater.

[0083] Optionally, if the first chilled water outlet temperature is low, the present application can turn on the antifreeze electric heater to further enhance the antifreeze effect and avoid the risk of freezing of the chiller.

[0084] It should be noted that the present application can effectively avoid the situation where the antifreeze water pump and the antifreeze electric heater are kept turned on for antifreeze through intelligent control of the antifreeze water pump and the antifreeze electric heater, thereby effectively reducing unnecessary energy consumption.

[0085] The antifreeze equipment control method proposed in the present application can intelligently identify whether there is a freezing risk for the chiller according to the ambient temperature and the suction saturation temperature, and can start the antifreeze water pump for antifreeze when it is determined that there is a freezing risk. After that, the chilled water outlet temperature can be detected, and the chiller can be intelligently identified whether there is still a freezing risk according to the chilled water outlet temperature, and the antifreeze electric heater can be started when it is determined that there is still a freezing risk. If it is determined that there is no freezing risk, there is no need to start the antifreeze electric heater, further enhancing the antifreeze effect and avoiding the freezing risk of the chiller, and can effectively avoid the energy consumption problem caused by the unnecessary start of the antifreeze electric heater. The present application can effectively realize the intelligent control of the antifreeze water pump and the antifreeze electric heater, thereby realizing intelligent antifreeze.

[0086] based on Figure 1 ,like Figure 2 As shown, the present application proposes a second antifreeze equipment control method, in which step S104 may include steps S201 and S202, wherein:

[0087] S201. Determine whether a first chilled water outlet temperature is less than a preset first water outlet temperature threshold, and obtain a determination result.

[0088] The first outlet water temperature threshold can be used to identify whether the chiller has an antifreeze risk. It should be noted that the first outlet water temperature threshold can be set by a technician according to actual conditions, and this application does not limit this.

[0089] S202: Control the operating state of the antifreeze electric heater according to the judgment result.

[0090] Specifically, the present application can control the antifreeze electric heater to turn on, or control the antifreeze electric heater to remain in an off state according to the judgment result.

[0091] Optionally, the present application may turn on the antifreeze electric heater when the first chilled water outlet temperature is less than the first outlet water temperature threshold;

[0092] Optionally, the present application may control the antifreeze electric heater to remain in an off state when the first chilled water outlet temperature is not less than the first water outlet temperature threshold.

[0093] The antifreeze equipment control method proposed in the present application can control the operating state of the antifreeze electric heater according to the judgment result of the first chilled water outlet temperature and the first outlet temperature threshold, optimize the intelligent control of the antifreeze electric heater, and thus optimize the intelligent antifreeze.

[0094] based on Figure 2 ,like Figure 3As shown, the present application proposes a third antifreeze equipment control method, in which step S202 may include:

[0095] S301. When it is determined that the first chilled water outlet temperature is lower than the first outlet temperature threshold, turn on the antifreeze electric heater.

[0096] Specifically, the present application can turn on the antifreeze electric heater when the first chilled water outlet temperature is lower than the first outlet temperature threshold.

[0097] S302, detecting the chilled water outlet temperature and using it as the second chilled water outlet temperature.

[0098] Optionally, the present application can delay the detection of the chilled water outlet temperature after turning on the antifreeze electric heater and use it as the second chilled water outlet temperature.

[0099] Specifically, the chilled water outlet temperature detected with a delay after the antifreeze electric heater is turned on can be used to control the operating state of the antifreeze electric heater, that is, it can be used to determine whether to turn off the antifreeze electric heater or control the antifreeze electric heater to remain on.

[0100] It is understandable that, in the present application, after the antifreeze electric heater is turned on, the outlet temperature of the chilled water is delayed to detect, and the outlet temperature of the chilled water can be obtained after the antifreeze electric heater effectively plays the antifreeze role (i.e., heats the water in the pipeline). Specifically, the technical effect that can be achieved by delaying the detection of the outlet temperature of the chilled water after the antifreeze electric heater is turned on can refer to the technical effect that can be achieved by delaying the detection of the outlet temperature of the chilled water after the antifreeze water pump is turned on.

[0101] S303: Control the operating state of the antifreeze electric heater according to the second chilled water outlet temperature.

[0102] Optionally, if the second chilled water outlet temperature is high, the present application may turn off the antifreeze electric heater.

[0103] Optionally, if the second chilled water outlet temperature is low, the present application can control the antifreeze electric heater to remain in an on state.

[0104] The antifreeze equipment control method proposed in this application can further optimize the intelligent control of the antifreeze electric heater and further optimize the intelligent antifreeze control.

[0105] based on Figure 3 , the present application proposes a fourth antifreeze equipment control method. In this method, step S303 may include steps S3031, S3032 and S3033, wherein:

[0106] S3031. When it is determined that the second chilled water outlet temperature is not less than a preset second water outlet temperature threshold, turn off the antifreeze electric heater.

[0107] The second outlet water temperature threshold can be used to control the operating state of the antifreeze electric heater, that is, it can be used to determine whether to control the antifreeze electric heater to remain on or to turn off the antifreeze electric heater. It should be noted that the second outlet water temperature threshold can be set by technicians according to actual conditions, and this application does not limit this.

[0108] S3032. When it is determined that the second chilled water outlet temperature is less than the second outlet temperature threshold, continue to detect the chilled water outlet temperature until it is detected that the chilled water outlet temperature is not less than the second outlet temperature threshold.

[0109] Optionally, when the second chilled water outlet temperature is determined through delayed detection, the present application can continue to delay detection of the chilled water outlet temperature when the second chilled water outlet temperature is less than the second outlet temperature threshold, until the chilled water outlet temperature is not less than the second outlet temperature threshold.

[0110] S3033: After detecting that the chilled water outlet temperature is not less than the second outlet temperature threshold, turn off the antifreeze electric heater.

[0111] The antifreeze equipment control method proposed in this application can further optimize the intelligent control of the operating state of the antifreeze electric heater and further optimize the antifreeze intelligent control.

[0112] based on Figure 2 ,like Figure 4 As shown, the present application proposes a fifth antifreeze equipment control method.

[0113] In the method, step S202 may include steps S401 and S402, wherein:

[0114] S401. When it is determined that the first chilled water outlet temperature is not less than the first outlet temperature threshold, detect the evaporator refrigerant liquid level and use it as the first evaporator refrigerant liquid level.

[0115] Specifically, the present application can detect the evaporator refrigerant liquid level when the first chilled water outlet temperature is not less than the first outlet temperature threshold.

[0116] S402: Control the operating state of the antifreeze electric heater according to the refrigerant liquid level of the first evaporator.

[0117] Optionally, the present application can turn on the antifreeze electric heater when the refrigerant liquid level in the first evaporator is high.

[0118] Optionally, the present application can control the antifreeze electric heater to remain in an off state when the refrigerant liquid level in the first evaporator is low.

[0119] It should be noted that the present application can adopt two parameters, namely the first chilled water outlet temperature and the evaporator refrigerant liquid level, to control the operating state of the antifreeze electric heater through dual judgment conditions, which can effectively reduce the risk of evaporator freezing, optimize the antifreeze control conditions, and enhance the reliability of antifreeze control.

[0120] Optionally, in other antifreeze equipment control methods proposed in the present application, the above step S402 may include:

[0121] S4021. When it is determined that the refrigerant liquid level of the first evaporator is not less than a preset first liquid level threshold, turn on the antifreeze electric heater.

[0122] S4022, detect the evaporator refrigerant liquid level and use it as the second evaporator refrigerant liquid level.

[0123] Among them, the refrigerant liquid level of the second evaporator can be used to control the operating state of the antifreeze electric heater, that is, it can be used to determine whether to control the antifreeze electric heater to remain in the on state or to turn off the antifreeze electric heater.

[0124] S4023. Control the operating state of the antifreeze electric heater according to the refrigerant liquid level of the second evaporator.

[0125] Optionally, step S4023 may include:

[0126] When it is determined that the refrigerant liquid level of the second evaporator is less than a preset second liquid level threshold, turning off the antifreeze electric heater;

[0127] When it is determined that the refrigerant liquid level of the second evaporator is not less than the second liquid level threshold, continue to detect the refrigerant liquid level of the evaporator until it is detected that the refrigerant liquid level of the evaporator is less than the second liquid level threshold;

[0128] After detecting that the evaporator refrigerant liquid level is less than the second liquid level threshold, the antifreeze electric heater is turned off.

[0129] The antifreeze equipment control method proposed in this application can use two parameters, namely the chilled water outlet temperature and the evaporator refrigerant liquid level, to control the operating state of the antifreeze electric heater through dual judgment conditions, which can effectively reduce the risk of evaporator freezing, optimize the antifreeze control conditions, and enhance the reliability of antifreeze control.

[0130] Based on the above antifreeze device control method, the present application proposes a sixth antifreeze device control method. In the sixth antifreeze device control method, after turning off the antifreeze electric heater, the following steps may also be included:

[0131] If the second ambient temperature is not less than the preset second ambient temperature threshold, and the second suction saturation temperature is not less than the preset second saturation temperature threshold, the antifreeze water pump is turned off;

[0132] If the second ambient temperature is lower than the second ambient temperature threshold, or the second suction saturation temperature is lower than the second saturation temperature threshold, the process returns to the step of detecting the chilled water outlet temperature and setting it as the first chilled water outlet temperature.

[0133] The second ambient temperature is the ambient temperature detected after the antifreeze electric heater is turned off.

[0134] The second intake air saturation temperature is the intake air saturation temperature detected after the antifreeze electric heater is turned off.

[0135] It can be understood that both the second ambient temperature threshold and the second saturation temperature threshold can be used to control the operating state of the antifreeze water pump.

[0136] It should be noted that, for the detection of the second ambient temperature and the second intake saturation temperature in the present application, whether only one of the parameters is detected or both parameters are detected, reference can be made to the relevant content of the detection of the first ambient temperature and the first intake saturation temperature.

[0137] The antifreeze equipment control method proposed in the present application can optimize the intelligent control of the antifreeze water pump based on the ambient temperature and the suction saturation temperature, thereby optimizing the antifreeze intelligent control.

[0138] based on Figure 1 The present application proposes a seventh antifreeze equipment control method. After step S101, the method may further include:

[0139] When it is determined that the chiller is in the on state, detecting the ambient temperature and using it as the third ambient temperature;

[0140] When it is determined that the third ambient temperature is less than a preset third ambient temperature threshold, obtaining the current time and the most recent antifreeze water pump start time;

[0141] The time obtained by subtracting the antifreeze water pump start time from the current time is determined as the target time;

[0142] According to the relationship between the target duration and the preset duration threshold, the operating state of the antifreeze water pump is controlled.

[0143] Among them, the third ambient temperature threshold can be used to control the operating state of the antifreeze water pump.

[0144] Specifically, the present application can record each time the antifreeze water pump is turned on while the chiller is on.

[0145] Optionally, the present application may turn on the antifreeze water pump when the target duration is greater than a preset duration threshold, and turn off the antifreeze water pump after the target duration.

[0146] It should be noted that the target duration can be set by the technician according to the actual situation, such as setting it to 20 minutes, and this application does not limit this.

[0147] Optionally, the present application may not need to turn on the antifreeze water pump when the target duration is not greater than a preset duration threshold.

[0148] It should be noted that, in the present application, when the chiller is in the on state and the ambient temperature is low, the antifreeze water pump can be started at intervals to prevent the pipes of the antifreeze water pump from freezing.

[0149] The anti-freeze control valve method for a chiller proposed in the present application can start the antifreeze water pump at intervals while the chiller is on to prevent the antifreeze water pump pipes from freezing, further realize intelligent control of the antifreeze water pump, and increase the reliability of the antifreeze control; and can effectively avoid turning on the antifreeze water pump all the time for antifreeze purposes, thereby reducing unnecessary energy consumption.

[0150] like Figure 5 As shown, in order to better illustrate the technical solution of the present application, the present application proposes an eighth antifreeze equipment control method, which may include the following steps:

[0151] S501, detecting the operating status of the chiller.

[0152] S502: When it is determined that the chiller is in a shutdown state, if the first ambient temperature is lower than the first ambient temperature threshold, or the first suction saturation temperature is lower than the first saturation temperature threshold, then start the antifreeze water pump.

[0153] If the first ambient temperature is not less than the first ambient temperature threshold, and the first intake air saturation temperature is not less than the first saturation temperature threshold, the process may return to step S501.

[0154] S503: Detect the chilled water outlet temperature and use it as the first chilled water outlet temperature.

[0155] S504, determine whether the first chilled water outlet temperature is less than the first water outlet temperature threshold, if so, execute step S505; otherwise, execute step S509.

[0156] S505, turn on the antifreeze electric heater.

[0157] S506: Detect the chilled water outlet temperature and use it as the second chilled water outlet temperature.

[0158] S507, determine whether the second chilled water outlet temperature is greater than or equal to the second water outlet temperature threshold, if so, execute step S508; otherwise, return to execute step S506.

[0159] S508, turn off the antifreeze electric heater and execute step S514 or S515.

[0160] S509, detecting the refrigerant liquid level of the evaporator and using it as the first evaporator refrigerant liquid level.

[0161] S510, determining whether the refrigerant liquid level of the first evaporator is not less than a first liquid level threshold; if so, executing step S511; otherwise, executing step S514 or S515.

[0162] S511. Turn on the antifreeze electric heater.

[0163] S512, detecting the refrigerant liquid level of the evaporator and using it as the refrigerant liquid level of the second evaporator.

[0164] S513, determine whether the refrigerant liquid level of the second evaporator is less than the second liquid level threshold, if so, execute step S514 or S515.

[0165] S514: If the second ambient temperature is not less than the preset second ambient temperature threshold, and the second suction saturation temperature is not less than the preset second saturation temperature threshold, turn off the antifreeze water pump and return to step S501.

[0166] S516: If the second ambient temperature is lower than the second ambient temperature threshold, or the second intake air saturation temperature is lower than the second saturation temperature threshold, the process returns to step S503.

[0167] The antifreeze equipment control method proposed in the present application can further optimize the intelligent control of the antifreeze equipment, thereby further optimizing the intelligent antifreeze control of the chiller.

[0168] like Figure 6 As shown, in order to better illustrate the technical solution of the present application, the present application proposes a ninth antifreeze equipment control method, which may include the following steps:

[0169] S601. Detect the operating status of the chiller.

[0170] S602: When it is determined that the chiller is in the on state, detect the ambient temperature and use it as the third ambient temperature.

[0171] S603, determining whether the third ambient temperature is less than the third ambient temperature threshold, if so, executing step S604; otherwise, returning to executing step S601.

[0172] S604: Determine the target duration by subtracting the antifreeze water pump start time from the current time.

[0173] S605: Determine whether the target duration is greater than a preset duration threshold. If so, execute step S606; otherwise, return to execute step S601.

[0174] S606, turn on the antifreeze water pump, and turn off the antifreeze water pump after the target time, and return to step S601.

[0175] The antifreeze equipment control method proposed in the present application can further optimize the intelligent control of the antifreeze equipment, thereby further optimizing the intelligent antifreeze control of the chiller.

[0176] and Figure 1 The method shown corresponds to Figure 7 As shown, the present application proposes an antifreeze equipment control system, including: a first detection unit 710, a first opening unit 720, a second detection unit 730 and a first control unit 740; wherein:

[0177] The first detection unit 710 is used to detect the operating status of the chiller;

[0178] The first start unit 720 is used to start the antifreeze water pump if the first ambient temperature is lower than a preset first ambient temperature threshold, or the first suction saturation temperature is lower than a preset first saturation temperature threshold, when it is determined that the chiller is in a shutdown state;

[0179] The second detection unit 730 is used to detect the chilled water outlet temperature and use it as the first chilled water outlet temperature;

[0180] The first control unit 740 is used to control the operating state of the antifreeze electric heater according to the first chilled water outlet temperature.

[0181] Optionally, the first control unit 740 includes: a judgment unit and a second control unit;

[0182] The judgment unit is used to judge whether the first chilled water outlet temperature is less than a preset first water outlet temperature threshold value, and obtain a judgment result;

[0183] The second control unit is used to control the operating state of the antifreeze electric heater according to the judgment result.

[0184] Optionally, the second control unit includes: a second opening unit, a third detection unit and a third control unit;

[0185] The second opening unit is used to open the antifreeze electric heater when it is determined that the first chilled water outlet temperature is lower than the first outlet temperature threshold;

[0186] The third detection unit is used to detect the chilled water outlet temperature and use it as the second chilled water outlet temperature;

[0187] The third control unit is used to control the operating state of the antifreeze electric heater according to the second chilled water outlet temperature.

[0188] Optionally, the third control unit includes: a first closing unit, a fourth detection unit and a second closing unit;

[0189] The first shut-down unit is configured to shut down the antifreeze electric heater when it is determined that the second chilled water outlet temperature is not less than a preset second outlet temperature threshold;

[0190] The fourth detection unit is used to continue detecting the chilled water outlet temperature when it is determined that the second chilled water outlet temperature is less than the second chilled water outlet temperature threshold, until it is detected that the chilled water outlet temperature is not less than the second chilled water outlet temperature threshold;

[0191] The second shut-down unit is used to shut down the antifreeze electric heater after detecting that the chilled water outlet temperature is not less than the second outlet temperature threshold.

[0192] Optionally, the first control unit 740 includes: a fifth detection unit and a fourth control unit;

[0193] The fifth detection unit is used to detect the evaporator refrigerant liquid level and use it as the first evaporator refrigerant liquid level when it is determined that the first chilled water outlet temperature is not less than the first water outlet temperature threshold;

[0194] The fourth control unit is used to control the operating state of the antifreeze electric heater according to the refrigerant liquid level of the first evaporator.

[0195] Optionally, the fourth control unit includes: a third opening unit, a sixth detection unit and a fifth control unit;

[0196] The third opening unit is used to turn on the antifreeze electric heater when it is determined that the refrigerant liquid level of the first evaporator is not less than a preset first liquid level threshold;

[0197] The sixth detection unit is used to detect the refrigerant liquid level of the evaporator and serves as the refrigerant liquid level of the second evaporator;

[0198] The fifth control unit is used to control the operating state of the antifreeze electric heater according to the refrigerant liquid level of the second evaporator.

[0199] Optionally, the fifth control unit includes: a third closing unit, a seventh detection unit and a fourth closing unit;

[0200] The third closing unit is used to close the antifreeze electric heater when it is determined that the refrigerant liquid level of the second evaporator is less than a preset second liquid level threshold;

[0201] The seventh detection unit is used for, when determining that the refrigerant liquid level of the second evaporator is not less than the second liquid level threshold, continuing to detect the refrigerant liquid level of the evaporator until it is detected that the refrigerant liquid level of the evaporator is less than the second liquid level threshold;

[0202] The fourth shut-down unit is used to shut down the antifreeze electric heater after detecting that the evaporator refrigerant liquid level is less than the second liquid level threshold.

[0203] Optionally, the system further comprises: a fifth closing unit and a triggering unit;

[0204] The fifth shut-down unit is configured to shut down the antifreeze water pump after shutting down the antifreeze electric heater if the second ambient temperature is not less than a preset second ambient temperature threshold and the second suction air saturation temperature is not less than a preset second saturation temperature threshold;

[0205] The trigger unit is configured to trigger the first detection unit 710 if the second ambient temperature is lower than the second ambient temperature threshold, or the second intake air saturation temperature is lower than the second saturation temperature threshold.

[0206] Optionally, the system further includes: an eighth detection unit, an acquisition unit, a determination unit and a sixth control unit;

[0207] The eighth detection unit is used to detect the ambient temperature as the third ambient temperature when it is determined that the chiller is in the on state;

[0208] The acquisition unit is used to acquire the current time and the most recent antifreeze water pump start time when it is determined that the third ambient temperature is less than a preset third ambient temperature threshold;

[0209] The determining unit is used to determine the time obtained by subtracting the antifreeze water pump start time from the current time as the target time;

[0210] The sixth control unit is used to control the operating state of the antifreeze water pump according to the relationship between the target duration and a preset duration threshold.

[0211] The antifreeze equipment control system proposed in the present application can intelligently identify whether there is a freezing risk for the chiller according to the ambient temperature and the suction saturation temperature, and can start the antifreeze water pump for antifreeze when it is determined that there is a freezing risk. After that, the chilled water outlet temperature can be detected, and the chiller can be intelligently identified whether there is still a freezing risk according to the chilled water outlet temperature, and the antifreeze electric heater can be started when it is determined that there is still a freezing risk. If it is determined that there is no freezing risk, there is no need to start the antifreeze electric heater, further enhancing the antifreeze effect and avoiding the freezing risk of the chiller, and can effectively avoid the energy consumption problem caused by the unnecessary start of the antifreeze electric heater. The present application can effectively realize the intelligent control of the antifreeze water pump and the antifreeze electric heater, thereby realizing intelligent antifreeze.

[0212] Figure 8 An example of a physical structure diagram of an electronic device is shown in FIG. Figure 8 As shown, the electronic device may include: a processor 810, a communication interface 820, a memory 830 and a communication bus 840, wherein the processor 810, the communication interface 820 and the memory 830 communicate with each other through the communication bus 840. The processor 810 may call the logic instructions in the memory 830 to execute the antifreeze device control method, which includes:

[0213] Check the operating status of the chiller;

[0214] When it is determined that the chiller is in a shutdown state, if the first ambient temperature is lower than a preset first ambient temperature threshold, or the first suction saturation temperature is lower than a preset first saturation temperature threshold, then starting the antifreeze water pump;

[0215] Detecting the chilled water outlet temperature and using it as the first chilled water outlet temperature;

[0216] The operating state of the antifreeze electric heater is controlled according to the first chilled water outlet temperature.

[0217] In addition, the logic instructions in the above-mentioned memory 830 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when it is sold or used as an independent product. Based on this understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art, and the computer software product is stored in a storage medium, including several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program codes.

[0218] On the other hand, the present application also provides a computer program product, which includes a computer program. The computer program can be stored on a computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the antifreeze device control method provided by the above methods, and the method includes:

[0219] Check the operating status of the chiller;

[0220] When it is determined that the chiller is in a shutdown state, if the first ambient temperature is lower than a preset first ambient temperature threshold, or the first suction saturation temperature is lower than a preset first saturation temperature threshold, then starting the antifreeze water pump;

[0221] Detecting the chilled water outlet temperature and using it as the first chilled water outlet temperature;

[0222] The operating state of the antifreeze electric heater is controlled according to the first chilled water outlet temperature.

[0223] On the other hand, the present application further provides a computer-readable storage medium, the computer-readable storage medium includes a stored program, wherein when the program is run, the antifreeze equipment control method provided by the above methods is executed, and the method includes:

[0224] Check the operating status of the chiller;

[0225] When it is determined that the chiller is in a shutdown state, if the first ambient temperature is lower than a preset first ambient temperature threshold, or the first suction saturation temperature is lower than a preset first saturation temperature threshold, then starting the antifreeze water pump;

[0226] Detecting the chilled water outlet temperature and using it as the first chilled water outlet temperature;

[0227] The operating state of the antifreeze electric heater is controlled according to the first chilled water outlet temperature.

[0228] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0229] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0230] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for controlling antifreeze equipment, It is characterized in that include: Check the operating status of the chiller; When it is determined that the chiller is in a shutdown state, if the first ambient temperature is lower than a preset first ambient temperature threshold, or the first suction saturation temperature is lower than a preset first saturation temperature threshold, then starting the antifreeze water pump; Detecting the chilled water outlet temperature and using it as the first chilled water outlet temperature; The operating state of the antifreeze electric heater is controlled according to the first chilled water outlet temperature.

2. The method according to claim 1, It is characterized in that The step of controlling the operating state of the antifreeze electric heater according to the first chilled water outlet temperature includes: Determine whether the first chilled water outlet temperature is less than a preset first water outlet temperature threshold, and obtain a determination result; According to the judgment result, the operation state of the antifreeze electric heater is controlled.

3. The method according to claim 2, It is characterized in that According to the judgment result, controlling the operation state of the antifreeze electric heater includes: When it is determined that the first chilled water outlet temperature is lower than the first outlet temperature threshold, turning on the antifreeze electric heater; Detecting the chilled water outlet temperature and using it as the second chilled water outlet temperature; The operating state of the antifreeze electric heater is controlled according to the second chilled water outlet temperature.

4. The method according to claim 3, It is characterized in that The step of controlling the operating state of the antifreeze electric heater according to the second chilled water outlet temperature includes: When it is determined that the second chilled water outlet temperature is not less than a preset second water outlet temperature threshold, turning off the antifreeze electric heater; When it is determined that the second chilled water outlet temperature is less than the second chilled water outlet temperature threshold, continue to detect the chilled water outlet temperature until it is detected that the chilled water outlet temperature is not less than the second chilled water outlet temperature threshold; After detecting that the chilled water outlet temperature is not less than the second outlet temperature threshold, turning off the antifreeze electric heater.

5. The method according to claim 2, It is characterized in that According to the judgment result, controlling the operation state of the antifreeze electric heater includes: When it is determined that the first chilled water outlet temperature is not less than the first outlet temperature threshold, detecting the evaporator refrigerant liquid level and using it as the first evaporator refrigerant liquid level; The operating state of the antifreeze electric heater is controlled according to the refrigerant liquid level of the first evaporator.

6. The method according to claim 5, It is characterized in that The controlling the operating state of the antifreeze electric heater according to the refrigerant liquid level of the first evaporator includes: When it is determined that the refrigerant liquid level of the first evaporator is not less than a preset first liquid level threshold, turning on the antifreeze electric heater; Detect the refrigerant level of the evaporator and use it as the refrigerant level of the second evaporator; The operating state of the antifreeze electric heater is controlled according to the refrigerant liquid level of the second evaporator.

7. The method according to claim 6, It is characterized in that The controlling the operating state of the antifreeze electric heater according to the refrigerant liquid level of the second evaporator includes: When it is determined that the refrigerant liquid level of the second evaporator is less than a preset second liquid level threshold, turning off the antifreeze electric heater; When it is determined that the refrigerant liquid level of the second evaporator is not less than the second liquid level threshold, continue to detect the refrigerant liquid level of the evaporator until it is detected that the refrigerant liquid level of the evaporator is less than the second liquid level threshold; After detecting that the evaporator refrigerant liquid level is less than the second liquid level threshold, turning off the antifreeze electric heater.

8. The method according to claim 4 or 7, It is characterized in that After turning off the antifreeze electric heater, the method further includes: If the second ambient temperature is not less than the preset second ambient temperature threshold, and the second suction saturation temperature is not less than the preset second saturation temperature threshold, shutting down the antifreeze water pump; If the second ambient temperature is lower than the second ambient temperature threshold, or the second suction saturation temperature is lower than the second saturation temperature threshold, the process returns to the step of detecting the chilled water outlet temperature and setting it as the first chilled water outlet temperature.

9. The method according to claim 1, It is characterized in that After detecting the operating status of the chiller, the method further includes: When it is determined that the chiller is in the on state, detecting the ambient temperature and using it as the third ambient temperature; When it is determined that the third ambient temperature is less than a preset third ambient temperature threshold, obtaining the current time and the most recent antifreeze water pump start time; The time obtained by subtracting the antifreeze water pump start time from the current time is determined as the target time; The operating state of the antifreeze water pump is controlled according to the magnitude relationship between the target duration and a preset duration threshold. 10.An antifreeze equipment control system, It is characterized in that include: A first detection unit, a first opening unit, a second detection unit and a first control unit; wherein: The first detection unit is used to detect the operating status of the chiller; The first opening unit is used to start the antifreeze water pump if the first ambient temperature is lower than a preset first ambient temperature threshold, or the first suction saturation temperature is lower than a preset first saturation temperature threshold, when it is determined that the chiller is in a shutdown state; The second detection unit is used to detect the chilled water outlet temperature and use it as the first chilled water outlet temperature; The first control unit is used to control the operating state of the antifreeze electric heater according to the first chilled water outlet temperature.

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