Plate heat exchanger anti-freezing method and device, electronic equipment and readable storage medium

Abstract

The application provides a plate heat exchanger anti-freezing method and device, electronic equipment and a readable storage medium, and belongs to the technical field of equipment control. The application detects the ambient temperature of a space where a heating system is located and the water pump inlet temperature in the heating system; determines whether the plate heat exchanger in the heating system has a freezing risk based on the ambient temperature and the water pump inlet temperature; and starts the compressor in the heating system to heat the stored water in the plate heat exchanger by operating the compressor in the case of determining that the plate heat exchanger has a freezing risk. In this way, whether the plate heat exchanger has a freezing risk can be determined by the ambient temperature and the water pump inlet temperature, and the stored water in the plate heat exchanger can be heated by starting the compressor in the case of determining that the plate heat exchanger has a freezing risk, so that the freezing of the stored water in the plate heat exchanger is reduced.

Description

Technical Field

[0001] This application relates to the field of equipment control technology, and in particular to a plate heat exchanger antifreeze method, device, electronic equipment and readable storage medium. Background Technology

[0002] Currently, plate heat exchangers are widely used in various heating systems due to their high heat transfer efficiency, such as underfloor heating systems and air conditioning systems with heating functions. For example, ... Figure 1 The diagram shows the structure of a heating system. Starting the compressor generates high-temperature, high-pressure gas, which enters a plate heat exchanger. The plate heat exchanger condenses and liquefies the gas, releasing heat. Turning on the water pump allows water from the tank to flow into the plate heat exchanger. After being heated, the water flows into the space heating device (as shown in the floor heating system), and finally returns to the water tank, thus achieving the effect of heating the space where the space heating device is located.

[0003] In applications, plate heat exchangers, due to their narrow flow channels and complex internal structure, often retain water even when the heating system is not in operation. In low-temperature winter environments, when the heating system is not used for extended periods or only for short periods, the water inside the plate heat exchanger can easily freeze, affecting its lifespan and, in severe cases, even causing internal cracks and damage.

[0004] Therefore, there is an urgent need for a technical solution to prevent plate heat exchangers from freezing. Summary of the Invention

[0005] In order to solve all or part of the above-mentioned technical problems, this application provides a plate heat exchanger antifreeze method, device, electronic equipment and readable storage medium.

[0006] In a first aspect, embodiments of this application provide a method for preventing the freezing of a plate heat exchanger, including:

[0007] The ambient temperature of the space where the heating system is located, and the water inlet temperature of the water pump in the heating system are detected.

[0008] Based on the ambient temperature and the water pump inlet temperature, determine whether there is a risk of icing in the plate heat exchanger in the heating system;

[0009] If it is determined that there is a risk of icing in the plate heat exchanger, the compressor in the heating system is started to heat the water stored in the plate heat exchanger by running the compressor.

[0010] In one possible implementation, determining whether the plate heat exchanger in the heating system is at risk of icing includes:

[0011] determining that the plate heat exchanger in the heating system has a risk of icing in a case that the ambient temperature is lower than a first temperature threshold and the water pump inlet temperature is lower than a second temperature threshold.

[0012] In one possible implementation, after starting the compressor in the heating system, the method further includes:

[0013] determining a water pump inlet temperature change rate of the heating system in a case that the compressor is operated for a first preset time length;

[0014] determining a water storage condition in the plate heat exchanger based on the water pump inlet temperature change rate;

[0015] controlling the heating system based on the water storage condition.

[0016] In one possible implementation, the controlling the heating system based on the water storage condition includes:

[0017] detecting whether a high-pressure protection event occurs in the heating system in a case that the water storage condition is no water storage;

[0018] turning off the heating system in a case that a continuous preset number of high-pressure protection events are detected.

[0019] In one possible implementation, the controlling the heating system based on the water storage condition includes:

[0020] determining a type of a water pump in the heating system in a case that the water storage condition is water storage;

[0021] controlling the heating system according to a first control strategy in a case that the type of the water pump is a first type;

[0022] controlling the heating system according to a second control strategy in a case that the type of the water pump is a second type.

[0023] In one possible implementation, the first type is a variable frequency water pump, and the controlling the heating system according to the first control strategy includes:

[0024] determining an initial frequency of the water pump based on the ambient temperature, where the lower the ambient temperature, the higher the corresponding initial frequency;

[0025] operating the water pump at the initial frequency as a running frequency, and detecting a compressor outlet temperature change rate of the heating system in a case that the water pump is operated at the running frequency for a first time length;

[0026] determine a frequency increasing parameter based on the compressor outlet temperature change rate, and increase the operating frequency by using the frequency increasing parameter, wherein the higher the compressor outlet temperature change rate is, the higher the corresponding frequency increasing parameter is;

[0027] detect whether the heating system meets a shutdown condition during operation of the water pump at the increased operating frequency;

[0028] in a case where the heating system meets the shutdown condition, shut down the heating system, wherein the heating system meets the shutdown condition in a case where a real-time water pump inlet temperature in the heating system is greater than a third temperature threshold, or a real-time compressor outlet temperature in the heating system is greater than a fourth temperature threshold.

[0029] In one possible implementation, the second type is a fixed-frequency water pump, and the controlling the heating system according to the second control strategy includes:

[0030] obtaining a fixed frequency of the water pump, and operating the water pump at the fixed frequency;

[0031] detecting whether the heating system meets a shutdown condition during operation of the water pump;

[0032] in a case where the heating system meets the shutdown condition, shut down the heating system, wherein the heating system meets the shutdown condition in a case where a real-time water pump inlet temperature in the heating system is greater than a third temperature threshold, or a real-time compressor outlet temperature in the heating system is greater than a fourth temperature threshold.

[0033] In a second aspect, an embodiment of the present application provides a plate heat exchanger anti-freezing device, including:

[0034] a detection module configured to detect an ambient temperature of a space where a heating system is located, and a water pump inlet temperature in the heating system;

[0035] a determination module configured to determine, based on the ambient temperature and the water pump inlet temperature, whether a plate heat exchanger in the heating system is at risk of freezing;

[0036] a starting module configured to start a compressor in the heating system to heat stored water in the plate heat exchanger by operating the compressor, in a case where it is determined that the plate heat exchanger is at risk of freezing.

[0037] In one possible implementation, the determination module is specifically configured to:

[0038] determine that the plate heat exchanger in the heating system is at risk of freezing, in a case where the ambient temperature is lower than a first temperature threshold, and the water pump inlet temperature is lower than a second temperature threshold.

[0039] In a possible implementation, the device further comprises a control module, and the control module is specifically configured to:

[0040] In a case where the compressor is operated for a first preset time length, determine a water pump inlet water temperature change rate in the heating system;

[0041] Determine a water storage condition in the plate heat exchanger based on the water pump inlet water temperature change rate;

[0042] Control the heating system based on the water storage condition.

[0043] In a possible implementation, the control module is further configured to:

[0044] In a case where the water storage condition is no water storage, detect whether a high-pressure protection event occurs in the heating system;

[0045] In a case where a continuous preset number of high-pressure protection events are detected, shut down the heating system.

[0046] In a possible implementation, the control module is further configured to:

[0047] In a case where the water storage condition is water storage, determine a type of water pump in the heating system;

[0048] In a case where the type of water pump is a first type, control the heating system according to a first control strategy;

[0049] In a case where the type of water pump is a second type, control the heating system according to a second control strategy.

[0050] In a possible implementation, the first type is a variable frequency water pump, and the control module is further configured to:

[0051] Determine an initial frequency of the water pump based on the ambient temperature, wherein the lower the ambient temperature, the higher the corresponding initial frequency;

[0052] Run the water pump at the initial frequency as a running frequency, and detect a compressor outlet temperature change rate in the heating system when the water pump is run at the running frequency for a first time length;

[0053] Determine a frequency increase parameter based on the compressor outlet temperature change rate, and increase the running frequency by using the frequency increase parameter, wherein the higher the compressor outlet temperature change rate, the higher the corresponding frequency increase parameter;

[0054] Detect whether the heating system meets a shutdown condition in a process in which the water pump is run at the increased running frequency.

[0055] In the case that the heating system meets a shutdown condition, shutting down the heating system, wherein the heating system meets the shutdown condition in the case that a real-time water pump inlet temperature in the heating system is greater than a third temperature threshold, or a real-time compressor outlet temperature in the heating system is greater than a fourth temperature threshold.

[0056] In one possible implementation, the second type is a fixed-frequency water pump, and the control module is further configured to:

[0057] acquire a fixed frequency of the water pump, and operate the water pump at the fixed frequency;

[0058] detect whether the heating system meets a shutdown condition during operation of the water pump;

[0059] In the case that the heating system meets a shutdown condition, shutting down the heating system, wherein the heating system meets the shutdown condition in the case that a real-time water pump inlet temperature in the heating system is greater than a third temperature threshold, or a real-time compressor outlet temperature in the heating system is greater than a fourth temperature threshold.

[0060] In a third aspect, an electronic device is provided, including a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory complete communication with each other through the communication bus.

[0061] The memory is configured to store a computer program.

[0062] The processor is configured to execute the program stored on the memory, and implement the method in any one of the first aspect.

[0063] In a fourth aspect, a computer readable storage medium is provided, and the computer readable storage medium stores a computer program, and the computer program is executed by a processor to implement the method in any one of the first aspect.

[0064] In a fifth aspect, a computer program product including instructions is provided, and when the computer program product is executed on a computer, the computer is caused to execute the plate heat exchanger anti-freezing method in any one of the above aspects.

[0065] The embodiments of the present application have the following beneficial effects:

[0066] The embodiment of the present application provides a plate heat exchanger anti-freezing method and device, electronic equipment and a readable storage medium, in the present application, firstly, the environment temperature of a space where a heating system is located is detected, and the water pump inlet temperature of the heating system is detected, then, based on the environment temperature and the water pump inlet temperature, whether the plate heat exchanger in the heating system has a freezing risk is determined, finally, in the case that it is determined that the plate heat exchanger has a freezing risk, the compressor in the heating system is started to heat the stored water in the plate heat exchanger by operating the compressor. In this way, whether the plate heat exchanger has a freezing risk can be determined through the environment temperature and the water pump inlet temperature, and in the case that it is determined that the plate heat exchanger has a freezing risk, the stored water in the plate heat exchanger is heated by starting the compressor, so that the freezing of the stored water in the plate heat exchanger is reduced, and the service life of the plate heat exchanger is prolonged.

[0067] Of course, implementing any product or method of the present application does not necessarily require all the advantages described above to be achieved at the same time. BRIEF DESCRIPTION OF DRAWINGS

[0068] The accompanying drawings, which are incorporated into and form part of the specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the application.

[0069] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings required to be used in the embodiments or prior art description will be briefly introduced below, and obviously, other drawings can also be obtained by those skilled in the art without creative labor.

[0070] Figure 1 A structural diagram of a heating system is provided for the embodiment of the present application.

[0071] Figure 2 A flowchart of a plate heat exchanger anti-freezing method is provided for the embodiment of the present application.

[0072] Figure 3 A flowchart of another plate heat exchanger anti-freezing method is provided for the embodiment of the present application.

[0073] Figure 4 A structural schematic diagram of a plate heat exchanger anti-freezing device is provided for the embodiment of the present application.

[0074] Figure 5 A structural schematic diagram of an electronic device is provided for the embodiment of the present application. DETAILED DESCRIPTION

[0075] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0076] The plate heat exchanger anti-freezing method provided by the present application will be explained and described below with reference to specific embodiments and the accompanying drawings. The embodiments do not constitute limitations on the embodiments of the present application.

[0077] Referring to Figure 2 An embodiment flowchart of the plate heat exchanger anti-freezing method provided by the present application is shown in FIG. 2. As shown in FIG. 2, the flowchart can include the following steps: Figure 2

[0078] S201, detecting an ambient temperature of a space where a heating system is located, and a water pump inlet temperature of the heating system.

[0079] The plate heat exchanger anti-freezing method provided by the present application can be applied to a heating system, which at least includes a plate heat exchanger, a compressor, a water tank, a water pump and a space heating device (such as a floor heating system). The outlet of the water tank is connected to the water inlet of the plate heat exchanger through the water pump, the water outlet of the plate heat exchanger is connected to the inlet of the space heating device, and the outlet of the space heating device is connected to the inlet of the water tank, so as to realize a water circulation loop. The gas outlet of the compressor is connected to the gas inlet of the plate heat exchanger, thereby realizing heating of the plate heat exchanger.

[0080] In the embodiments of the present application, the ambient temperature can be detected by a temperature sensor arranged in the space where the heating system is located, and the water pump inlet temperature can be detected by a temperature sensor arranged between the outlet of the water pump and the water inlet of the plate heat exchanger in the heating system.

[0081] S202, determining whether the plate heat exchanger in the heating system has a freezing risk based on the ambient temperature and the water pump inlet temperature.

[0082] In the embodiments of the present application, whether the plate heat exchanger in the heating system has a freezing risk can be determined based on the ambient temperature and the water pump inlet temperature. Specifically, it is determined that the plate heat exchanger in the heating system has a freezing risk when the ambient temperature is lower than a first temperature threshold and the water pump inlet temperature is lower than a second temperature threshold.

[0083] That is, when the ambient temperature is relatively low and the water pump inlet temperature is also relatively low, it is considered that the plate heat exchanger is prone to freezing.​

[0084] S203, in the case of determining that the plate heat exchanger has a risk of icing, starting the compressor in the heating system to heat the stored water in the plate heat exchanger by running the compressor.

[0085] In the embodiment of the present application, in the case of determining that the plate heat exchanger has a risk of icing through the ambient temperature and the water pump inlet water temperature, the compressor in the heating system can be started, and the compressor can be run at a preset fixed frequency to heat the plate heat exchanger and thus heat the stored water in the plate heat exchanger. In this way, the temperature of the stored water in the plate heat exchanger can be increased, thereby reducing the possibility of icing of the stored water in the plate heat exchanger and reducing the case of icing of the stored water in the plate heat exchanger.

[0086] In the embodiment of the present application, first, the ambient temperature of the space where the heating system is located and the water pump inlet water temperature in the heating system are detected, then, based on the ambient temperature and the water pump inlet water temperature, it is determined whether the plate heat exchanger in the heating system has a risk of icing, and finally, in the case of determining that the plate heat exchanger has a risk of icing, the compressor in the heating system is started to heat the stored water in the plate heat exchanger by running the compressor. In this way, whether the plate heat exchanger has a risk of icing can be determined through the ambient temperature and the water pump inlet water temperature, and in the case of determining that the plate heat exchanger has a risk of icing, the stored water in the plate heat exchanger can be heated by starting the compressor, thereby reducing the case of icing of the stored water in the plate heat exchanger and prolonging the service life of the plate heat exchanger.

[0087] Referring to Figure 3 Another embodiment flowchart of the plate heat exchanger anti-freezing method provided in the embodiment of the present application is provided. As shown in Figure 3 The flowchart can include the following steps:

[0088] S301, in the case of running the compressor for a first preset time length, determining the water pump inlet water temperature variation rate.

[0089] In the embodiment of the present application, after starting the compressor in the heating system, timing is started, when the timing reaches the first preset time length, the water pump inlet water temperature at this time is detected, the temperature difference between the water pump inlet water temperature at this time and the water pump inlet water temperature detected before starting the compressor is calculated, and the ratio of the temperature difference to the first preset time length is determined as the water pump inlet water temperature variation rate.

[0090] S302, determining the stored water condition in the plate heat exchanger based on the water pump inlet water temperature variation rate.

[0091] In the embodiments of the present application, there are two water storage conditions, one is no water, and the other is water. It should be noted that the no water here not only means no water, but also means a small amount of water storage. The water here means a large amount of water storage.

[0092] Since the frequency of the compressor operation is fixed, the water in the plate heat exchanger rises faster in the same length. Based on this, the specific implementation of determining the water storage condition in the plate heat exchanger based on the water pump inlet temperature change rate can include: in the case that the water pump inlet temperature change rate is greater than or equal to a preset threshold, it is determined that there is no water or a small amount of water in the plate heat exchanger, and in the case that the water pump inlet temperature change rate is less than the preset threshold, it is determined that there is water (i.e., a large amount of water) in the plate heat exchanger.

[0093] S303, controlling the heating system based on the water storage condition.

[0094] In an embodiment, the specific implementation of controlling the heating system based on the water storage condition can include: in the case that the water storage condition is no water, detecting whether a high pressure protection event occurs in the heating system, and in the case that a continuous preset number of high pressure protection events are detected, shutting down the heating system.

[0095] In this embodiment, since there is no water or a small amount of water in the plate heat exchanger, the heat exchange of the plate heat exchanger is very insufficient, and high pressure protection will soon be reached. If a continuous preset number (such as three) of high pressure protection events are detected, the heating system is shut down, thereby avoiding damaging the compressor.

[0096] In another embodiment, the specific implementation of controlling the heating system based on the water storage condition can include: in the case that the water storage condition is water, determining the type of the water pump in the heating system; in the case that the type of the water pump is a first type, controlling the heating system according to a first control strategy; and in the case that the type of the water pump is a second type, controlling the heating system according to a second control strategy.

[0097] As a possible implementation, the first type is a variable frequency water pump, and controlling the heating system according to the first control strategy can include the following steps:

[0098] determining an initial frequency of the water pump based on the ambient temperature, wherein the lower the ambient temperature, the higher the initial frequency; running the water pump at the initial frequency as a running frequency, and detecting a compressor outlet temperature change rate in the heating system when the water pump is run at the running frequency for a first duration; determining a frequency increasing parameter based on the compressor outlet temperature change rate, and increasing the running frequency by using the frequency increasing parameter, wherein the higher the compressor outlet temperature change rate, the higher the frequency increasing parameter; detecting whether the heating system meets a shutdown condition when the water pump is run at the increased running frequency; and shutting down the heating system when the heating system meets the shutdown condition, wherein the heating system meets the shutdown condition when a real-time water pump inlet temperature in the heating system is greater than a third temperature threshold, or a real-time compressor outlet temperature in the heating system is greater than a fourth temperature threshold.

[0099] In this embodiment, the ambient temperature interval can be divided in advance, and the initial frequency is determined according to the ambient temperature interval in which the ambient temperature is located. For example, 1) if the ambient temperature is located in the interval [Ta, T0), the initial frequency is F0; 2) if the ambient temperature is located in the interval [Tb, Ta), the initial frequency is F1; 3) if the ambient temperature is located in the interval [Tmin, Tb), the initial frequency is F2, wherein F2> F1> F0. In this way, the initial frequency of the water pump can be limited according to the ambient temperature, so as to limit the water flow speed, prevent the water flow speed from being too fast, and cause the unit high pressure protection, and increase the water flow speed when the ambient temperature is low, so as to increase the heat exchange efficiency.

[0100] After the water pump is controlled to run at the initial frequency for the first duration, the running frequency can be further adjusted according to the compressor outlet temperature change rate. Specifically, the change rate interval can be divided in advance, and the frequency increasing parameter for adjusting the running frequency is determined according to the frequency interval in which the compressor outlet temperature change rate is located. For example, 1) if ΔThigh pressure / Δt> m, the water pump running frequency is increased by ƒ0; 2) if ΔThigh pressure / Δt∈[n, m), the water pump running frequency is increased by ƒ1; and if ΔThigh pressure / Δt∈[0, n), the current frequency is maintained unchanged (i.e. the frequency increasing parameter is zero), wherein ƒ0 and ƒ1 are the frequency increasing parameters, and ƒ0> ƒ1> 0. In this way, the heat exchange efficiency can be increased on the basis of avoiding the heating system entering the high pressure protection too soon.

[0101] During the running of the water pump at the increased running frequency, the real-time water pump inlet temperature in the heating system or the real-time compressor outlet temperature in the heating system is detected. When the real-time water pump inlet temperature is greater than a third temperature threshold, it means that there is no risk of icing in the water in the heating system, and the heating system is shut down at this time. Or, when the real-time compressor outlet temperature is greater than a fourth temperature threshold, it means that the continued running is easy to damage the compressor, and the heating system is shut down at this time.

[0102] It should be noted that the real-time water pump inlet temperature is greater than the third temperature threshold or the real-time compressor outlet temperature is greater than the fourth temperature threshold also exists during the operation at the initial frequency, and therefore, in another implementation, the heating system can also be closed during the operation at the initial frequency, that is, the real-time water pump inlet temperature or the real-time compressor outlet temperature is detected in real time, and the heating system is closed when the real-time water pump inlet temperature is greater than the third temperature threshold or the real-time compressor outlet temperature is greater than the fourth temperature threshold.

[0103] As another possible implementation, the second type is a fixed-frequency water pump, and controlling the heating system according to the second control strategy can include the following steps: obtaining a fixed frequency of the water pump, and operating the water pump at the fixed frequency; detecting whether the heating system meets a closing condition during the operation of the water pump; and closing the heating system when the heating system meets the closing condition, wherein the heating system meets the closing condition when a real-time water pump inlet temperature in the heating system is greater than a third temperature threshold or a real-time compressor outlet temperature in the heating system is greater than a fourth temperature threshold.

[0104] In this embodiment, the water pump is a fixed-frequency water pump, and the difference from the variable-frequency water pump in the control process is that there is no need to adjust the operating frequency, and only a preset fixed frequency needs to be obtained.

[0105] Through the above two embodiments, the water pump can be started when there is a large amount of stored water in the plate heat exchanger, so as to heat the stored water in the entire heating system and avoid the stored water in the heating system from freezing.

[0106] Based on the same technical concept, the embodiments of the present application also provide a plate heat exchanger anti-freezing device, as shown in Figure 4 The device includes:

[0107] The detection module 401 is configured to detect an ambient temperature of a space where the heating system is located and a water pump inlet temperature in the heating system.

[0108] The determination module 402 is configured to determine whether a plate heat exchanger in the heating system has a freezing risk based on the ambient temperature and the water pump inlet temperature.

[0109] The starting module 403 is configured to start a compressor in the heating system to heat stored water in the plate heat exchanger by operating the compressor when it is determined that the plate heat exchanger has a freezing risk.

[0110] In one possible implementation, the determination module is specifically configured to:

[0111] determine that the plate heat exchanger in the heating system has a risk of icing when the ambient temperature is lower than a first temperature threshold and the water pump inlet temperature is lower than a second temperature threshold.

[0112] In one possible implementation, the device further includes a control module, which is specifically configured to:

[0113] determine a water pump inlet temperature change rate of the heating system when the compressor is operated for a first preset time length;

[0114] determine a water storage condition in the plate heat exchanger based on the water pump inlet temperature change rate;

[0115] control the heating system based on the water storage condition.

[0116] In one possible implementation, the control module is further configured to:

[0117] detect whether a high-pressure protection event occurs in the heating system when the water storage condition is no water storage;

[0118] turn off the heating system when a continuous preset number of high-pressure protection events are detected.

[0119] In one possible implementation, the control module is further configured to:

[0120] determine a type of water pump in the heating system when the water storage condition is water storage;

[0121] control the heating system according to a first control strategy when the type of water pump is a first type;

[0122] control the heating system according to a second control strategy when the type of water pump is a second type.

[0123] In one possible implementation, the first type is a variable frequency water pump, and the control module is further configured to:

[0124] determine an initial frequency of the water pump based on the ambient temperature, where the lower the ambient temperature, the higher the corresponding initial frequency;

[0125] operate the water pump at the initial frequency as a running frequency, and detect a compressor outlet temperature change rate of the heating system when the water pump is operated at the running frequency for a first time length;

[0126] determine a frequency increase parameter based on the compressor outlet temperature change rate, and increase the running frequency by using the frequency increase parameter, where the higher the compressor outlet temperature change rate, the higher the corresponding frequency increase parameter.

[0127] detecting whether the heating system meets a shutdown condition during operation of the water pump at the adjusted operating frequency;

[0128] shutting down the heating system in a case where the heating system meets the shutdown condition, wherein the heating system meets the shutdown condition in a case where a real-time water pump inlet temperature in the heating system is greater than a third temperature threshold, or a real-time compressor outlet temperature in the heating system is greater than a fourth temperature threshold.

[0129] In one possible implementation, the second type is a fixed-frequency water pump, and the control module is further configured to:

[0130] obtain a fixed frequency of the water pump, and operate the water pump at the fixed frequency;

[0131] detect whether the heating system meets a shutdown condition during operation of the water pump;

[0132] shutting down the heating system in a case where the heating system meets the shutdown condition, wherein the heating system meets the shutdown condition in a case where a real-time water pump inlet temperature in the heating system is greater than a third temperature threshold, or a real-time compressor outlet temperature in the heating system is greater than a fourth temperature threshold.

[0133] In the embodiments of the present application, first, an ambient temperature of a space where the heating system is located and a water pump inlet temperature in the heating system are detected, then, based on the ambient temperature and the water pump inlet temperature, it is determined whether a plate heat exchanger in the heating system has a freezing risk, and finally, in a case where it is determined that the plate heat exchanger has the freezing risk, a compressor in the heating system is started to heat stored water in the plate heat exchanger by operating the compressor. In this way, whether the plate heat exchanger has the freezing risk can be determined by the ambient temperature and the water pump inlet temperature, and in a case where it is determined that the plate heat exchanger has the freezing risk, the stored water in the plate heat exchanger is heated by starting the compressor, so as to reduce the freezing of the stored water in the plate heat exchanger and prolong the service life of the plate heat exchanger.

[0134] Based on the same technical concept, the embodiments of the present application further provide an electronic device, as shown in the accompanying drawings, which comprises a processor 111, a communication interface 112, a memory 113 and a communication bus 114, wherein the processor 111, the communication interface 112 and the memory 113 complete mutual communication through the communication bus 114, Figure 5

[0135] The memory 113 is used to store a computer program.

[0136] ​The processor 111, when executing the program stored in the memory 113, implements the following steps:

[0137] detecting an ambient temperature of a space where the heating system is located, and a water pump inlet temperature of the heating system;

[0138] determining whether the plate heat exchanger in the heating system has a risk of icing based on the ambient temperature and the water pump inlet temperature;

[0139] in a case where it is determined that the plate heat exchanger has the risk of icing, starting a compressor in the heating system to heat stored water in the plate heat exchanger by operating the compressor.

[0140] The communication bus mentioned in the electronic device can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. The communication bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, only one thick line is used in the figure, but it does not mean that there is only one bus or only one type of bus.

[0141] The communication interface is used for communication between the electronic device and other devices.

[0142] The memory can include a Random Access Memory (RAM) and can also include a Non-Volatile Memory (NVM), such as at least one disk memory. Optionally, the memory can also be at least one storage device located away from the aforementioned processor.

[0143] The processor mentioned above can be a general-purpose processor, including a Central Processing Unit (CPU), a Network Processor (NP), etc.; can also be a Digital Signal Processing (DSP), an Application Specific Integrated Circuit (ASIC), a Field-Programmable Gate Array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component.

[0144] In a further embodiment provided in the present application, a computer readable storage medium is also provided, and the computer readable storage medium stores a computer program, and the computer program is executed by a processor to implement the steps of any of the plate heat exchanger anti-freezing methods provided in the present application.

[0145] In a further embodiment provided in the present application, a computer program product containing instructions, which, when executed on a computer, cause the computer to perform any of the plate heat exchanger anti-freezing methods provided in the embodiments.

[0146] In the above embodiments, all or part of the embodiments can be implemented by software, hardware, firmware or any combination thereof. When implemented by software, all or part of the embodiments can be implemented in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center through wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) manner. The computer readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. containing one or more available media. The available medium can be a magnetic medium (for example, floppy disk, hard disk, magnetic tape), an optical medium (for example, DVD), or a semiconductor medium (for example, Solid State Disk (SSD)) and the like.

[0147] It should be noted that in this paper, the relationship terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the element defined by the statement "including a" does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0148] The foregoing detailed description of the application has been presented for purposes of illustration and description. Various modifications and changes can be made to these embodiments without departing from the spirit and scope of the application. It is intended that the scope of the application should not be limited by the particular representative embodiments described above.

Claims

1. A method for preventing freezing of a plate heat exchanger, characterized in that, The method includes: The ambient temperature of the space where the heating system is located, and the water inlet temperature of the water pump in the heating system are detected. Based on the ambient temperature and the water pump inlet temperature, determine whether there is a risk of icing in the plate heat exchanger in the heating system; If it is determined that there is a risk of icing in the plate heat exchanger, the compressor in the heating system is started to heat the water stored in the plate heat exchanger by running the compressor. The process of starting the compressor in the heating system further includes: Determine the rate of change of water pump inlet temperature in the heating system while the compressor is running for a first preset duration; Determining the water status in the plate heat exchanger based on the water pump inlet temperature change rate includes: determining that there is no water or a small amount of water in the plate heat exchanger when the water pump inlet temperature change rate is greater than or equal to a preset threshold, and determining that there is water in the plate heat exchanger when the water pump inlet temperature change rate is less than the preset threshold. The heating system is controlled based on the water storage status.

2. The method according to claim 1, characterized in that, Determining whether the plate heat exchanger in the heating system has a risk of icing includes: If the ambient temperature is below a first temperature threshold and the water pump inlet temperature is below a second temperature threshold, it is determined that the plate heat exchanger in the heating system is at risk of freezing.

3. The method according to claim 1, characterized in that, The control of the heating system based on the water storage status includes: If there is no water in the heating system, detect whether a high-pressure protection event has occurred. If a high-pressure protection event is detected for a predetermined number of consecutive times, the heating system will be shut down.

4. The method according to claim 1, characterized in that, The control of the heating system based on the water storage status includes: If there is water in the system, determine the type of water pump in the heating system. When the water pump is of the first type, the heating system is controlled according to the first control strategy; When the water pump is of the second type, the heating system is controlled according to the second control strategy.

5. The method according to claim 4, characterized in that, The first type is a variable frequency water pump, and the step of controlling the heating system according to the first control strategy includes: The initial frequency of the water pump is determined based on the ambient temperature, wherein the lower the ambient temperature, the higher the corresponding initial frequency; The water pump is operated using the initial frequency as the operating frequency, and the rate of change of the compressor outlet temperature in the heating system is detected when the water pump is operated at the operating frequency for a first duration. The adjustment parameter is determined based on the compressor outlet temperature change rate, and the operating frequency is increased using the adjustment parameter. The higher the compressor outlet temperature change rate, the higher the corresponding adjustment parameter. During the operation of the water pump at the increased operating frequency, it is checked whether the heating system meets the shutdown conditions. The heating system is shut down when the heating system meets the shutdown conditions, wherein the heating system meets the shutdown conditions when the real-time water pump inlet temperature in the heating system is greater than a third temperature threshold, or when the real-time compressor outlet temperature in the heating system is greater than a fourth temperature threshold.

6. The method according to claim 4, characterized in that, The second type is a fixed-frequency water pump, and the control of the heating system according to the second control strategy includes: Obtain the fixed frequency of the water pump, and operate the water pump according to the fixed frequency; During the operation of the water pump, it is detected whether the heating system meets the shutdown conditions; The heating system is shut down when the heating system meets the shutdown conditions, wherein the heating system meets the shutdown conditions when the real-time water pump inlet temperature in the heating system is greater than a third temperature threshold, or when the real-time compressor outlet temperature in the heating system is greater than a fourth temperature threshold.

7. A plate heat exchanger antifreeze device, characterized in that, The device includes: The detection module is used to detect the ambient temperature of the space where the heating system is located, and the water inlet temperature of the water pump in the heating system. The determination module is used to determine whether there is a risk of icing in the plate heat exchanger in the heating system based on the ambient temperature and the water pump inlet temperature. A startup module is used to start the compressor in the heating system when it is determined that there is a risk of icing in the plate heat exchanger, so as to heat the water stored in the plate heat exchanger by running the compressor. The device further includes a control module for: Determine the rate of change of water pump inlet temperature in the heating system while the compressor is running for a first preset duration; Determining the water status in the plate heat exchanger based on the water pump inlet temperature change rate includes: determining that there is no water or a small amount of water in the plate heat exchanger when the water pump inlet temperature change rate is greater than or equal to a preset threshold, and determining that there is water in the plate heat exchanger when the water pump inlet temperature change rate is less than the preset threshold. The heating system is controlled based on the water storage status.

8. An electronic device, characterized in that, It includes a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other through the communication bus; Memory, used to store computer programs; A processor, when executing a program stored in memory, implements the method described in any one of claims 1-6.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the method described in any one of claims 1-6.

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