Monitoring methods, devices and electronic equipment for heat pump systems

Abstract

This invention provides a monitoring method, apparatus, and electronic device for a heat pump system. The monitoring method includes: acquiring the target superheat of the heat pump system in its initial operating state; maintaining the heat pump system in its initial operating state when the target superheat is less than a first threshold; and determining whether the refrigerant circuit of the heat pump system is blocked when the target superheat is greater than or equal to the first threshold. This allows for timely detection of the refrigerant circuit status of the heat pump system, enabling the system to stop operating in the event of blockage. This solves the problem in existing technologies where refrigerant circuit blockage causes high-pressure protection of the unit and prolonged high-pressure conditions on the water-side heat exchanger, leading to heat exchanger deformation. This ultimately improves heat exchange efficiency and extends the unit's service life.

Description

Technical Field

[0001] This invention relates to the field of heat pump energy-saving technology, and more specifically, to a monitoring method, apparatus, electronic device, and computer-readable storage medium for a heat pump system. Background Technology

[0002] A heat pump mainly consists of a compressor, evaporator, condenser, and electronic expansion valve. The refrigerant is compressed into a high-temperature, high-pressure gas in the compressor and discharged. It then releases heat in the condenser and becomes a high-temperature, high-pressure liquid. The lost heat is carried away by the hot water to provide heating for the user. After passing through the expansion valve, it becomes a low-pressure, high-temperature liquid and enters the evaporator to evaporate and absorb heat. It absorbs heat energy from the outside environment (which can be rivers, lakes, groundwater, underground soil layers, air, etc., i.e., what we call water source, ground source, and air source heat pumps). Finally, the low-pressure gas from the evaporator enters the compressor to complete the cycle.

[0003] Among the various faults in heat pump systems, blockage of the refrigerant circuit can cause the unit to be under high pressure protection and the water-side heat exchanger to be under high pressure for a long time, which can lead to the heat exchanger being squeezed and deformed, affecting the heat exchange effect and the service life of the unit. Summary of the Invention

[0004] The main objective of this invention is to provide a monitoring method, device, electronic equipment, and computer-readable storage medium for a heat pump system, in order to solve the problem of heat exchange efficiency and unit service life caused by refrigerant blockage in the prior art.

[0005] To achieve the above objectives, according to one aspect of the present invention, a monitoring method for a heat pump system is provided, the monitoring method comprising: acquiring a target superheat of the heat pump system in an initial operating state; maintaining the heat pump system in the initial operating state when the target superheat is less than a first threshold; and determining whether the refrigerant circuit of the heat pump system is blocked when the target superheat is greater than or equal to the first threshold.

[0006] Optionally, the heat pump system includes a compressor and an evaporator. Obtaining the target superheat of the heat pump system includes: obtaining the suction temperature of the compressor and the inlet pipe temperature of the evaporator, where both the suction temperature and the inlet pipe temperature are temperatures at a first moment; and calculating the difference between the suction temperature and the inlet pipe temperature to obtain the target superheat.

[0007] Optionally, the heat pump system includes a compressor. Determining whether the refrigerant circuit of the heat pump system is blocked includes: acquiring the ambient temperature of the external environment where the heat pump system is located and the suction temperature of the compressor; calculating the difference between the ambient temperature and the suction temperature to obtain a first difference; if the first difference is greater than a second threshold, maintaining the heat pump system in its initial operating state; and if the first difference is less than or equal to the second threshold, continuing to determine whether the refrigerant circuit of the heat pump system is blocked.

[0008] Optionally, the heat pump system includes a throttling device. Further determination of whether the refrigerant path of the heat pump system is blocked includes: acquiring the inlet water temperature of the heat pump system, the temperature before throttling, the target valve opening of the throttling device, and the maximum valve opening of the throttling device; the inlet water temperature is the temperature of the fluid entering the heat pump system, and the temperature before throttling is the temperature of the fluid in the heat pump system before entering the throttling device; calculating the difference between the inlet water temperature and the temperature before throttling to obtain a second difference; if the second difference is greater than a third threshold, or the target valve opening is less than the maximum valve opening, maintaining the heat pump system in its initial operating state; if the second difference is less than or equal to the third threshold, and the target valve opening is the maximum valve opening, determining that the refrigerant path of the heat pump system is blocked.

[0009] Optionally, obtaining the target valve opening and the maximum valve opening of the throttling device includes obtaining the target number of steps and the maximum number of steps of the electronic expansion valve.

[0010] Optionally, the monitoring method further includes: when it is determined that the refrigerant circuit of the heat pump system is blocked, sending a first control signal to the heat pump system so that the heat pump system stops upon receiving the first control signal.

[0011] Optionally, the heat pump system has an alarm, and the monitoring method further includes: when it is determined that the refrigerant circuit of the heat pump system is blocked, sending a second control signal to the alarm, so that the alarm will sound an alarm upon receiving the second control signal, to indicate that the refrigerant circuit of the heat pump system is blocked.

[0012] According to another aspect of the present invention, a control device for a heat pump system is provided, the device comprising: an acquisition device for acquiring a target superheat of the heat pump system in an initial operating state; a holding device for maintaining the heat pump system in the initial operating state when the target superheat is less than a first threshold; and a determining device for determining whether the refrigerant circuit of the heat pump system is blocked when the target superheat is greater than or equal to the first threshold.

[0013] According to another aspect of the present invention, an electronic device is also provided, comprising: a processor; a memory for storing processor-executable instructions; wherein the processor is configured to execute instructions to implement the monitoring method of the heat pump system described above.

[0014] According to another aspect of the present invention, a computer-readable storage medium is also provided, which, when the instructions in the computer-readable storage medium are executed by a processor of an electronic device, enables the electronic device to perform the monitoring method of the heat pump system described above.

[0015] The present invention provides a monitoring method for a heat pump system. By first obtaining the target superheat and a first threshold of the heat pump system, it is possible to determine whether the heat pump system should maintain its initial operating state based on the difference between the target superheat and the first threshold. If the target superheat is greater than or equal to the first threshold, it is further determined whether the refrigerant circuit of the heat pump system is blocked. This allows for timely detection of the refrigerant circuit status, enabling the heat pump system to be stopped in the event of a blockage. This solves the problem in the prior art where refrigerant circuit blockage in heat pump systems causes high-pressure protection of the unit and long-term high-pressure conditions on the water-side heat exchanger, resulting in heat exchanger deformation. This method aims to improve heat exchange efficiency and extend the service life of the unit. Attached Figure Description

[0016] The accompanying drawings, which form part of this specification, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0017] Figure 1 This is a hardware structure block diagram of a computer terminal for a monitoring method of a heat pump system, according to an exemplary embodiment.

[0018] Figure 2 This is a flowchart illustrating a monitoring method for a heat pump system according to an exemplary embodiment;

[0019] Figure 3 It is based on Figure 2 A detailed flowchart of a monitoring method for a heat pump system is shown in an exemplary embodiment;

[0020] Figure 4 This is a structural block diagram of the monitoring device for a heat pump system according to Embodiment 2 of the present invention;

[0021] Figure 5 This is a device block diagram of a terminal according to an embodiment of the present invention. Detailed Implementation

[0022] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0023] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0024] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of the invention described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0025] Example 1

[0026] According to an embodiment of the present invention, an embodiment of a monitoring method for a heat pump system is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0027] The method embodiment provided in Embodiment 1 of this application can be executed in a mobile terminal, computer terminal or similar computing device. Figure 1 A hardware block diagram of a computer terminal (or mobile device) for implementing a monitoring method for a heat pump system is shown. Figure 1 As shown, the computer terminal 10 (or mobile device) may include one or more processors 102 (shown as 102a, 102b, ..., 102n in the figure) 102 (processor 102 may include, but is not limited to, a microprocessor MCU or a programmable logic device FPGA, etc.), a memory 104 for storing data, and a transmission device for communication functions. In addition, it may also include: a display, an input / output interface (I / O interface), a universal serial bus (USB) port (which may be included as one of the ports of a BUS bus), a network interface, a power supply, and / or a camera. Those skilled in the art will understand that... Figure 1 The structure shown is for illustrative purposes only and does not limit the structure of the aforementioned electronic device. For example, computer terminal 10 may also include... Figure 1 The more or fewer components shown, or having the same Figure 1 The different configurations shown.

[0028] It should be noted that the aforementioned one or more processors 102 and / or other data processing circuits are generally referred to herein as "data processing circuits". These data processing circuits may be embodied, in whole or in part, in software, hardware, firmware, or any other combination thereof. Furthermore, the data processing circuits may be a single, independent processing module, or may be integrated, in whole or in part, into any other element within the computer terminal 10 (or mobile device). As involved in the embodiments of this application, the data processing circuits serve as a processor control mechanism (e.g., selection of a variable resistor termination path connected to an interface).

[0029] The memory 104 can be used to store software programs and modules of application software, such as the program instructions / data storage device corresponding to the heat pump system monitoring method in this embodiment of the invention. The processor 102 executes various functional applications and data processing by running the software programs and modules stored in the memory 104, thereby realizing the heat pump system monitoring method of the aforementioned application. The memory 104 may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, the memory 104 may further include memory remotely located relative to the processor 102, and these remote memories can be connected to the computer terminal 10 via a network. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.

[0030] The transmission device is used to receive or send data via a network. Specific examples of the network described above may include a wireless network provided by the communication provider of computer terminal 10. In one example, the transmission device includes a Network Interface Controller (NIC), which can connect to other network devices via a base station to communicate with the Internet. In another example, the transmission device may be a Radio Frequency (RF) module, used for wireless communication with the Internet.

[0031] The display can be, for example, a touchscreen liquid crystal display (LCD) that allows the user to interact with the user interface of the computer terminal 10 (or mobile device).

[0032] Under the aforementioned operating environment, this application provides the following: Figure 2 The monitoring method for the heat pump system shown is as follows: Figure 2 This is a flowchart of a monitoring method for a heat pump system according to Embodiment 1 of the present invention, as follows: Figure 2 As shown, the method includes:

[0033] Step S202: Obtain the target superheat of the heat pump system in its initial operating state;

[0034] Step S204: When the target superheat is less than the first threshold, keep the heat pump system in the initial working state;

[0035] Step S206: If the target superheat is greater than or equal to the first threshold, determine whether the refrigerant circuit of the heat pump system is blocked.

[0036] By employing the aforementioned monitoring method for heat pump systems, the target superheat and a first threshold of the heat pump system are first obtained. The difference between the target superheat and the first threshold is used to determine whether the heat pump system should maintain its initial operating state. If the target superheat is greater than or equal to the first threshold, it is further determined whether the refrigerant circuit of the heat pump system is blocked. This allows for timely detection of the refrigerant circuit status, enabling the heat pump system to be stopped in the event of blockage. This solves the problem in existing technologies where refrigerant circuit blockage in heat pump systems causes high-pressure protection of the unit and prolonged high-pressure conditions on the water-side heat exchanger, leading to heat exchanger deformation. This method aims to improve heat exchange efficiency and extend the unit's service life.

[0037] In some alternative implementations, the heat pump system includes a compressor and an evaporator. Obtaining the target superheat of the heat pump system includes: obtaining the suction temperature of the compressor and the inlet temperature of the evaporator, both of which are temperatures at a first moment; and calculating the difference between the suction temperature and the inlet temperature to obtain the target superheat.

[0038] In the above embodiments, excessively humid refrigerant gas entering the compressor in the heat pump system can easily cause liquid slugging in the compressor, preventing the heat pump system from operating normally. To prevent liquid slugging in the compressor and ensure its safe operation, as well as the normal operation of the heat pump system, the target superheat of the heat pump system is obtained by acquiring the compressor's suction temperature and the evaporator's inlet pipe temperature. Furthermore, the heat pump system has a first threshold, which is the maximum allowable superheat in the heat pump system. By acquiring the first threshold and comparing the target superheat with the first threshold, it is possible to determine whether the refrigerant circuit of the heat pump system is blocked when the target superheat is greater than or equal to the first threshold. This allows for timely detection of the refrigerant circuit and implementation of protective measures for the heat pump system.

[0039] In some optional embodiments, the heat pump system includes a compressor. Determining whether the refrigerant path of the heat pump system is blocked includes: acquiring the ambient temperature of the external environment where the heat pump system is located and the suction temperature of the compressor; calculating the difference between the ambient temperature and the suction temperature to obtain a second difference; if the second difference is greater than a second threshold, maintaining the heat pump system in its initial operating state; and if the second difference is less than or equal to the second threshold, continuing to determine whether the refrigerant path of the heat pump system is blocked.

[0040] In the above embodiments, during the process of determining whether the refrigerant circuit of the heat pump system is blocked, the situation where the target superheat is greater than or equal to the first threshold may not be entirely due to refrigerant circuit blockage, but may also be due to the difference between the ambient temperature and the suction temperature of the compressor in the heat pump system. Therefore, in order to more accurately determine whether the refrigerant circuit of the heat pump system is blocked, the ambient temperature of the external environment where the heat pump system is located and the suction temperature of the compressor, as well as the second threshold, are first obtained. The second threshold represents the minimum temperature difference between the heat pump system and the external environment. The difference between the ambient temperature and the suction temperature is used to obtain a first difference value, which represents the current temperature difference between the external temperature and the heat pump system. By comparing the first difference value with the second threshold, if the first difference value is greater than the second threshold, it is determined that the refrigerant circuit of the heat pump system is not blocked. If the first difference value is less than or equal to the first threshold, since it cannot be confirmed whether the phenomenon that the target superheat of the heat pump system is greater than or equal to the first threshold is caused by refrigerant circuit blockage, it is necessary to continue to determine whether the refrigerant circuit of the heat pump system is blocked.

[0041] In some optional embodiments, the heat pump system includes a throttling device. Further determination of whether the refrigerant path of the heat pump system is blocked includes: acquiring the inlet water temperature of the heat pump system, the temperature before throttling, the target valve opening of the throttling device, and the maximum valve opening of the throttling device; the inlet water temperature being the temperature of the fluid entering the heat pump system, and the temperature before throttling being the temperature of the fluid in the heat pump system before entering the throttling device; calculating the difference between the inlet water temperature and the temperature before throttling to obtain a second difference; if the second difference is greater than a third threshold, or the target valve opening is less than the maximum valve opening, continuing to maintain the heat pump system in its initial operating state; if the second difference is less than or equal to the third threshold, and the target valve opening is the maximum valve opening, determining that the refrigerant path of the heat pump system is blocked.

[0042] In the above embodiments, since it cannot be confirmed whether the phenomenon that the target superheat of the heat pump system is greater than or equal to the first threshold is caused by the blockage of the refrigerant circuit of the heat pump system when the first difference is less than or equal to the first threshold, this embodiment obtains the inlet water temperature and the temperature before throttling of the heat pump system, and compares the difference between the inlet water temperature and the temperature before throttling with the second difference obtained. Since the third threshold represents the minimum temperature difference of the throttling temperature drop, if the second difference is greater than the third threshold and the target valve opening of the corresponding throttling device is less than the maximum valve opening, the phenomenon that the target superheat is greater than or equal to the first threshold may be caused by the small temperature difference between the ambient temperature and the heat pump system, is excluded. This allows the heat pump system to continue to be in the initial working state. Thus, if the second difference is less than or equal to the third threshold and the target valve opening is the maximum valve opening, it is determined that the refrigerant circuit of the heat pump system is blocked.

[0043] In some alternative implementations, the throttling device is an electronic expansion valve, and obtaining the target valve opening and the maximum valve opening of the throttling device includes: obtaining the target number of steps and the maximum number of steps of the electronic expansion valve.

[0044] In the above embodiments, to achieve better throttling effects, it is usually necessary to adjust the valve opening of the throttling device to a certain value. Using the aforementioned electronic expansion valve, since the target superheat control system in the heat pump system consists of an electronic expansion valve, a pressure sensor, a temperature sensor, and a controller, during operation, the pressure sensor transmits the evaporator outlet pressure, the temperature sensor transmits the compressor target superheat to the controller, and the controller processes the signals and then outputs a command to the stepper motor of the electronic expansion main valve, opening the valve to the required position. This allows the electronic expansion valve to use the electrical signal generated by the regulated parameters to control the voltage or current applied to the expansion valve, thereby achieving the purpose of regulating the liquid supply.

[0045] In some alternative implementations, the monitoring method further includes: upon determining that the refrigerant circuit of the heat pump system is blocked, sending a first control signal to the heat pump system so that the heat pump system shuts down upon receiving the first control signal.

[0046] In the above embodiments, in order to protect the heat pump system, the monitoring method is adopted such that when it is determined that the refrigerant circuit of the heat pump system is blocked, a first control signal is sent to the heat pump system so that the heat pump system stops upon receiving the first control signal.

[0047] In some alternative implementations, the heat pump system has an alarm, and the monitoring method further includes: when it is determined that the refrigerant circuit of the heat pump system is blocked, sending a second control signal to the alarm so that the alarm will sound an alarm upon receiving the second control signal to indicate that the refrigerant circuit of the heat pump system is blocked.

[0048] In the above embodiments, when monitoring determines that the refrigerant circuit of the heat pump system is blocked, in order to more promptly know that the heat pump system is in a shutdown state, an alarm is also installed in the heat pump system. This alarm receives the second control signal at the same time that the heat pump system receives the first control signal to stop, so as to alert the user that the heat pump system is in a shutdown state, so that the user can discover and solve the problem in a timely manner.

[0049] For example, the ambient temperature measured by the above heat pump system, as well as the difference between the suction temperature and the inlet pipe temperature (target superheat), are shown in Table 1:

[0050] Table 1

[0051]

[0052] The table above shows the target superheat of the heat pump system under different ambient temperatures.

[0053] For example, such as Figure 3 As shown, the first threshold is set to T under different environments. 1k +5, the second threshold is ΔT, the third threshold is -2, the throttling device is an electronic expansion valve, and the difference between the suction temperature and the inlet pipe temperature is the target superheat, the difference between the ambient temperature and the suction temperature is the first difference, the difference between the temperature before throttling and the inlet water temperature is the second difference, the electronic expansion valve step number corresponds to the valve opening of the throttling device, the above monitoring method includes: firstly, obtaining the target superheat, the first difference, the second difference, and the electronic expansion valve step number of the heat pump system, when the target superheat ≥ T 1k If +5 is true, maintain the initial operating state of the heat pump system. If true, determine if the first difference ≤ ΔT is true. If no, maintain the initial operating state of the heat pump system. If true, determine if the second difference ≤ -2 and the electronic expansion valve has the maximum number of steps is true. If no, maintain the initial operating state of the heat pump system. If true, determine if the refrigerant circuit of the heat pump system is blocked, control the heat pump system to shut down, and send an alarm.

[0054] Example 2

[0055] According to embodiments of the present invention, an apparatus for implementing the above-described monitoring method for a heat pump system is also provided. Figure 4This is a structural block diagram of a monitoring device for a heat pump system according to Embodiment 2 of the present invention. The device includes: an acquisition module 302, a holding module 304, and a determination module 306. The device will be described in detail below:

[0056] The acquisition module 302 is used to acquire the target superheat of the heat pump system in its initial operating state;

[0057] The holding module 304 is used to keep the heat pump system in its initial operating state when the target superheat is less than a first threshold.

[0058] The determination module 306 is used to determine whether the refrigerant circuit of the heat pump system is blocked when the target superheat is greater than or equal to a first threshold.

[0059] The aforementioned monitoring device for the heat pump system first acquires the target superheat and a first threshold of the heat pump system through the acquisition module 302. Then, the holding module 304 and the determining module 306 make judgments, enabling the system to first determine whether to maintain the initial operating state based on the difference between the target superheat and the first threshold. If the target superheat is greater than or equal to the first threshold, the system further determines whether the refrigerant circuit of the heat pump system is blocked. This allows for timely detection of the refrigerant circuit status and enables the system to stop operating in the event of a blockage. This solves the problem in the prior art where refrigerant circuit blockage in heat pump systems causes high-pressure protection of the unit and long-term high-pressure conditions on the water-side heat exchanger, resulting in heat exchanger deformation. This improves heat exchange efficiency and extends the service life of the unit.

[0060] It should be noted here that the above-mentioned acquisition module 302, holding module 304 and determination module 306 correspond to steps S202 to S206 in Embodiment 1. The multiple modules and the corresponding steps implement the same instances and application scenarios, but are not limited to the content disclosed in Embodiment 1 above.

[0061] Example 3

[0062] Embodiments of the present invention may provide an electronic device, which may be any one of the computer terminal devices in a group of computer terminals.

[0063] Optionally, in this embodiment, the aforementioned electronic device may be located in at least one of a plurality of network devices in a computer network.

[0064] Optionally, Figure 5 This is a structural block diagram of an electronic device according to an exemplary embodiment. For example... Figure 5As shown, the electronic device may include: one or more (only one is shown in the figure) processors 41 and a memory 42 for storing processor-executable instructions; wherein the processor is configured to execute instructions to implement the monitoring method of the heat pump system described above.

[0065] The memory can be used to store software programs and modules, such as the program instructions / modules corresponding to the monitoring method and device for the heat pump system in this embodiment of the invention. The processor executes various functional applications and data processing by running the software programs and modules stored in the memory, thereby realizing the aforementioned monitoring method for the heat pump system. The memory may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, the memory may further include memory remotely located relative to the processor, and these remote memories can be connected to a computer terminal via a network. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.

[0066] The processor can call the information and application stored in the memory through the transmission device to perform the following steps: obtain the target superheat of the heat pump system in the initial operating state; keep the heat pump system in the initial operating state if the target superheat is less than a first threshold; and determine whether the refrigerant circuit of the heat pump system is blocked if the target superheat is greater than or equal to the first threshold.

[0067] Optionally, the processor may also execute program code for the following steps: the heat pump system includes a compressor and an evaporator, and the target superheat of the heat pump system is obtained, including: obtaining the suction temperature of the compressor and the inlet pipe temperature of the evaporator, wherein the suction temperature and the inlet pipe temperature are both temperatures at a first moment; calculating the difference between the suction temperature and the inlet pipe temperature to obtain the target superheat.

[0068] Optionally, the processor may also execute program code for the following steps: the heat pump system includes a compressor, and determining whether the refrigerant circuit of the heat pump system is blocked includes: acquiring the ambient temperature of the external environment where the heat pump system is located and the suction temperature of the compressor; calculating the difference between the ambient temperature and the suction temperature to obtain a first difference; if the first difference is greater than a second threshold, maintaining the heat pump system in its initial operating state; and if the first difference is less than or equal to the second threshold, continuing to determine whether the refrigerant circuit of the heat pump system is blocked.

[0069] Optionally, the processor may also execute program code for the following steps: the heat pump system includes a throttling device; further determining whether the refrigerant path of the heat pump system is blocked includes: acquiring the inlet water temperature, the temperature before throttling, the target valve opening of the throttling device, and the maximum valve opening of the throttling device of the heat pump system, wherein the inlet water temperature is the temperature of the fluid entering the heat pump system, and the temperature before throttling is the temperature of the fluid in the heat pump system before entering the throttling device; calculating the difference between the inlet water temperature and the temperature before throttling to obtain a second difference; if the second difference is greater than a third threshold, or the target valve opening is less than the maximum valve opening, continuing to maintain the heat pump system in its initial operating state; if the second difference is less than or equal to the third threshold, and the target valve opening is the maximum valve opening, determining that the refrigerant path of the heat pump system is blocked.

[0070] Optionally, the processor may also execute program code that performs the following steps: obtaining the target valve opening and the maximum valve opening of the throttling device, including: obtaining the target number of steps and the maximum number of steps of the electronic expansion valve.

[0071] Optionally, the processor may also execute program code that performs the following steps: The monitoring method further includes: when it is determined that the refrigerant circuit of the heat pump system is blocked, sending a first control signal to the heat pump system so that the heat pump system stops upon receiving the first control signal.

[0072] Optionally, the processor may also execute program code for the following steps: the heat pump system has an alarm, and the monitoring method further includes: when it is determined that the refrigerant circuit of the heat pump system is blocked, sending a second control signal to the alarm, so that the alarm will sound an alarm upon receiving the second control signal, to indicate that the refrigerant circuit of the heat pump system is blocked.

[0073] Those skilled in the art will understand that Figure 5 The structure shown is for illustrative purposes only. Figure 5 This does not limit the structure of the aforementioned electronic devices. For example, it may also include... Figure 5 The more or fewer components shown (such as network interfaces, display devices, etc.), or having the same Figure 5 The different configurations shown.

[0074] A person skilled in the art will understand that all or part of the steps in the various methods of the above embodiments can be completed by instructing the hardware related to the terminal device through a program, and the program can be stored in a computer-readable storage medium, which may include: a flash drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, etc.

[0075] Example 4

[0076] In an exemplary embodiment, a computer-readable storage medium including instructions is also provided, which, when executed by a processor of a terminal, enable the terminal to perform the monitoring method of the heat pump system described above. Optionally, the computer-readable storage medium may be a non-transitory computer-readable storage medium, such as a ROM, random access memory (RAM), CD-ROM, magnetic tape, floppy disk, and optical data storage device.

[0077] Optionally, in this embodiment, the computer-readable storage medium described above can be used to store the program code executed by the monitoring method of the heat pump system provided in Embodiment 1 above.

[0078] Optionally, in this embodiment, the computer-readable storage medium may be located in any computer terminal in a computer terminal group in a computer network, or in any mobile terminal in a mobile terminal group.

[0079] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: obtaining the target superheat of the heat pump system in its initial operating state; maintaining the heat pump system in its initial operating state if the target superheat is less than a first threshold; and determining whether the refrigerant circuit of the heat pump system is blocked if the target superheat is greater than or equal to the first threshold.

[0080] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: the heat pump system includes a compressor and an evaporator, and obtaining the target superheat of the heat pump system includes: obtaining the suction temperature of the compressor and the inlet pipe temperature of the evaporator, wherein the suction temperature and the inlet pipe temperature are both temperatures at a first moment; calculating the difference between the suction temperature and the inlet pipe temperature to obtain the target superheat.

[0081] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: the heat pump system includes a compressor, and determining whether the refrigerant circuit of the heat pump system is blocked includes: acquiring the ambient temperature of the external environment where the heat pump system is located and the suction temperature of the compressor; calculating the difference between the ambient temperature and the suction temperature to obtain a first difference; if the first difference is greater than a second threshold, maintaining the heat pump system in an initial operating state; and if the first difference is less than or equal to the second threshold, continuing to determine whether the refrigerant circuit of the heat pump system is blocked.

[0082] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: the heat pump system includes a throttling device, and further determining whether the refrigerant path of the heat pump system is blocked includes: acquiring the inlet water temperature of the heat pump system, the temperature before throttling, the target valve opening of the throttling device, and the maximum valve opening of the throttling device, wherein the inlet water temperature is the temperature of the fluid entering the heat pump system, and the temperature before throttling is the temperature of the fluid in the heat pump system before entering the throttling device; calculating the difference between the inlet water temperature and the temperature before throttling to obtain a second difference; if the second difference is greater than a third threshold, or the target valve opening is less than the maximum valve opening, continuing to maintain the heat pump system in its initial operating state; if the second difference is less than or equal to the third threshold, and the target valve opening is the maximum valve opening, determining that the refrigerant path of the heat pump system is blocked.

[0083] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: obtaining the target valve opening degree and the maximum valve opening degree of the throttling device, including: obtaining the target number of steps and the maximum number of steps of the electronic expansion valve.

[0084] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: the monitoring method further includes: when it is determined that the refrigerant circuit of the heat pump system is blocked, sending a first control signal to the heat pump system so that the heat pump system stops upon receiving the first control signal.

[0085] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: the heat pump system has an alarm, and the monitoring method further includes: when it is determined that the refrigerant circuit of the heat pump system is blocked, sending a second control signal to the alarm, so that the alarm will sound an alarm upon receiving the second control signal, for indicating that the refrigerant circuit of the heat pump system is blocked.

[0086] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0087] In the above embodiments of the present invention, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0088] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection of units or modules may be electrical or other forms.

[0089] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0090] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0091] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0092] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A monitoring method for a heat pump system, characterized in that, Includes the following steps: Obtain the target superheat of the heat pump system in its initial operating state; If the target superheat is less than the first threshold, the heat pump system is kept in the initial operating state. If the target superheat is greater than or equal to the first threshold, determine whether the refrigerant circuit of the heat pump system is blocked. The heat pump system includes a compressor, and determining whether the refrigerant circuit of the heat pump system is blocked includes: The ambient temperature of the external environment where the heat pump system is located and the suction temperature of the compressor are obtained; Calculate the difference between the ambient temperature and the inhalation temperature to obtain a first difference; If the first difference is greater than the second threshold, the heat pump system remains in the initial operating state. If the first difference is less than or equal to the second threshold, it is further determined whether the refrigerant circuit of the heat pump system is blocked. The heat pump system includes a throttling device, and the step of further determining whether the refrigerant circuit of the heat pump system is blocked includes: The inlet water temperature, the temperature before throttling, the target valve opening of the throttling device, and the maximum valve opening of the throttling device of the heat pump system are obtained. The inlet water temperature is the temperature of the fluid entering the heat pump system, and the temperature before throttling is the temperature of the fluid in the heat pump system before entering the throttling device. The difference between the inlet water temperature and the temperature before throttling is calculated to obtain the second difference. The third threshold represents the minimum temperature difference for the throttling temperature drop. If the second difference is greater than the third threshold, or the target valve opening is less than the maximum valve opening, the heat pump system continues to be kept in the initial operating state. If the second difference is less than or equal to the third threshold and the target valve opening is the maximum valve opening, it is determined that the refrigerant circuit of the heat pump system is in the blocked state.

2. The monitoring method according to claim 1, characterized in that, The heat pump system includes a compressor and an evaporator, and obtaining the target superheat of the heat pump system includes: The suction temperature of the compressor and the inlet pipe temperature of the evaporator are obtained, wherein the suction temperature and the inlet pipe temperature are both the temperatures at a first moment. The target superheat is obtained by calculating the difference between the intake temperature and the inlet pipe temperature.

3. The monitoring method according to claim 1, characterized in that, The throttling device is an electronic expansion valve. Obtaining the target valve opening and the maximum valve opening of the throttling device includes: Obtain the target number of steps and the maximum number of steps of the electronic expansion valve.

4. The monitoring method according to any one of claims 1 to 2, characterized in that, The monitoring method also includes: If it is determined that the refrigerant circuit of the heat pump system is in the blocked state, a first control signal is sent to the heat pump system so that the heat pump system stops upon receiving the first control signal.

5. The monitoring method according to any one of claims 1 to 2, characterized in that, The heat pump system has an alarm, and the monitoring method further includes: If it is determined that the refrigerant circuit of the heat pump system is blocked, a second control signal is sent to the alarm, so that the alarm will sound an alarm upon receiving the second control signal to indicate that the refrigerant circuit of the heat pump system is blocked.

6. A control device for a heat pump system, characterized in that, The control device includes: Acquisition device, used to acquire the target superheat of the heat pump system in its initial operating state; A holding device is used to keep the heat pump system in the initial operating state when the target superheat is less than a first threshold. A determining device is configured to determine whether the refrigerant circuit of the heat pump system is blocked when the target superheat is greater than or equal to the first threshold. The heat pump system includes a compressor, and the determining device includes: The first sub-acquisition module is used to acquire the ambient temperature of the external environment where the heat pump system is located and the suction temperature of the compressor. The first calculation module is used to calculate the difference between the ambient temperature and the intake temperature to obtain a first difference. The first sub-holding module is used to keep the heat pump system in the initial operating state when the first difference is greater than the second threshold. The first sub-determination module is used to further determine whether the refrigerant circuit of the heat pump system is blocked if the first difference is less than or equal to the second threshold. The heat pump system includes a throttling device, and the sub-determining module includes: The second sub-acquisition module is used to acquire the inlet water temperature, the temperature before throttling, the target valve opening of the throttling device, and the maximum valve opening of the throttling device of the heat pump system. The inlet water temperature is the temperature of the fluid entering the heat pump system, and the temperature before throttling is the temperature of the fluid in the heat pump system before entering the throttling device. The first calculation module is used to calculate the difference between the inlet water temperature and the temperature before throttling, and obtain the second difference. The third threshold represents the minimum temperature difference of the throttling temperature drop. The second sub-holding module is used to continue to keep the heat pump system in the initial working state when the second difference is greater than the third threshold or the target valve opening is less than the maximum valve opening. The second sub-determination module is used to determine that the refrigerant circuit of the heat pump system is in the blocked state when the second difference is less than or equal to the third threshold and the target valve opening is the maximum valve opening.

7. An electronic device, characterized in that, include: processor; Memory used to store the processor's executable instructions; The processor is configured to execute the instructions to implement the monitoring method for the heat pump system as described in any one of claims 1 to 5.

8. A computer-readable storage medium, characterized in that, When the instructions in the computer-readable storage medium are executed by the processor of the electronic device, the electronic device is able to perform the monitoring method of the heat pump system as described in any one of claims 1 to 5.

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