Heat pump system control method, device, apparatus and storage medium

Abstract

Embodiments of the present application disclose a heat pump system control method, device, equipment and storage medium, which are used for a centralized control device, the centralized control device is in communication connection with at least one heat pump unit and a water pump, the water pump is connected with the heat pump unit through a pipeline, and communication connection states of the at least one heat pump unit are detected; when the communication connection states are all fault states, then the on-off of the water pump is controlled through a shift control strategy, the shift control strategy includes controlling the water pump with a running time exceeding a first time threshold in a preset time period to be turned off, and controlling a water pump with the shortest running time in the preset time period to be turned on when the water pump is turned off; when the communication connection state of at least one heat pump unit is a normal state, and a start demand instruction is received, then the on-off of the water pump is controlled according to a current operation mode through a ring temperature control strategy or a pressure control strategy, the problem of low intelligent degree of control is solved, the intelligent degree is improved, and the service life is prolonged.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the technical field of heat exchange systems, and in particular to a heat pump system control method, device, equipment and storage medium. BACKGROUND

[0002] A heat pump system is an effective use of external heat sources, such as geothermal, water heat, air heat and solar energy, to convert low-temperature heat into high-temperature heat, or to use low-temperature heat to cool high-temperature heat, and is widely used in people's daily work and life. In particular, a heat pump system using water as an external heat source has been widely used based on its stability, energy saving and low cost.

[0003] In a heat pump system, multiple water pumps are usually used for corresponding water flow conduction control, and by controlling one or several of the water pumps to be turned on, the water flow is realized. Based on the heat exchange treatment through the water flow, there must be water in the pipeline carrying the water flow. When the ambient temperature is very low in winter, the ambient temperature is lower than the freezing point of water, and when the heat pump unit is running, stops due to failure or stops due to power failure, since there is no flowing water in the pipeline carrying the water flow at this time, the water in the pipeline may freeze, and once it freezes, the corresponding pipeline will burst, thereby affecting the operation of the heat pump system.

[0004] In the existing heat pump system, when the heat pump unit stops, a water pump is selected to be turned on at regular intervals to prevent freezing of the pipeline. This method cannot adjust the start and stop according to changes in the end (heat pump unit), and the degree of intelligence is low. SUMMARY

[0005] Embodiments of the present application provide a heat pump system control method, device, equipment and storage medium, which can solve the problem of low intelligence of heat pump system operation control, improve the intelligence of heat pump system control, and prolong the service life of the heat pump system.

[0006] In a first aspect, embodiments of the present application provide a heat pump system control method for a centralized control device, the centralized control device being in communication connection with at least one heat pump unit, the centralized control device being in communication connection with a water pump, the water pump being connected to the heat pump unit through a pipeline, and the method comprising:

[0007] detecting the communication connection state of the at least one heat pump unit;

[0008] when the communication connection state is a fault state, controlling the on-off of the water pump through a shift control strategy, the shift control strategy comprising controlling the water pump whose running time exceeds a first time threshold in a preset time period to be turned off, and controlling the water pump with the shortest running time in the preset time period to be turned on when the water pump is turned off;

[0009] When the communication connection state of at least one of the heat pump units is normal, and a start demand instruction is received, then the switch of the water pump is controlled according to the current operation mode through the ring temperature control strategy or the pressure control strategy.

[0010] Further, when the communication connection state of at least one of the heat pump units is normal, and a start demand instruction is received, then the switch of the water pump is controlled according to the current operation mode through the ring temperature control strategy or the pressure control strategy, including:

[0011] When the communication connection state of at least one of the heat pump units is normal, and a start demand instruction is received, then the current operation mode is identified;

[0012] When it is identified that the current operation mode is a heating mode, then the switch of the water pump is controlled through the ring temperature control strategy;

[0013] When it is identified that the current operation mode is a cooling mode, then the switch of the water pump is controlled through the pressure control strategy.

[0014] Further, when it is identified that the current operation mode is a heating mode, then the switch of the water pump is controlled through the ring temperature control strategy, including:

[0015] When it is identified that the current operation mode is a heating mode, then the operation fault of the environment temperature sensing device is detected;

[0016] When it is detected that the environment temperature sensing device has an operation fault, then the switch of the water pump is controlled through the shift control strategy;

[0017] When it is detected that the environment temperature sensing device is operating normally, then the switch of the water pump is controlled according to the environment temperature detected by the environment temperature sensing device and the ring temperature control strategy.

[0018] Further, the water pump includes a main pump and a standby pump;

[0019] When it is detected that the environment temperature sensing device is operating normally, then the switch of the water pump is controlled according to the environment temperature detected by the environment temperature sensing device and the ring temperature control strategy, including:

[0020] When it is detected that the environment temperature sensing device is operating normally, the environment temperature is obtained according to the environment temperature sensing device;

[0021] When the environment temperature is less than or equal to a first temperature threshold, then the main pump and the standby pump are both controlled to be turned on, the first temperature threshold is less than a target temperature value, and the target temperature value is a target temperature value contained in the start demand instruction;

[0022] When the ambient temperature is greater than a second temperature threshold and less than or equal to a target temperature value, then control any one of the water pumps to be turned on, the second temperature threshold being greater than the first temperature threshold and less than the target temperature value.

[0023] Further, when it is identified that the current operation mode is the refrigeration mode, then the switching of the water pump is controlled by a pressure control strategy, including:

[0024] When it is identified that the current operation mode is the refrigeration mode, then the pressure sensing device is detected for operation failure;

[0025] When it is detected that the pressure sensing device has operation failure, then the switching of the water pump is controlled by a round-robin control strategy;

[0026] When it is detected that the pressure sensing device is in normal operation, then the switching of the water pump is controlled according to the pressure value detected by the pressure sensing device and a pressure control strategy.

[0027] Further, the water pump includes a main pump and a backup pump;

[0028] When it is detected that the pressure sensing device is in normal operation, then the switching of the water pump is controlled according to the pressure value detected by the pressure sensing device and a pressure control strategy, including:

[0029] When it is detected that the pressure sensing device is in normal operation, then the outlet water pressure value and the return water pressure value of the water pump are detected by the pressure sensing device;

[0030] The outlet water pressure value and the return water pressure value are calculated and processed to obtain a pressure difference value;

[0031] When the pressure difference value is less than or equal to a first pressure threshold, then the main pump and the backup pump are both controlled to be turned on;

[0032] When the pressure difference value is greater than the first pressure threshold and less than or equal to a second pressure threshold, then any one of the water pumps is controlled to be turned on;

[0033] When the pressure difference value is greater than the second pressure threshold, then the switching of the water pump is controlled by a round-robin control strategy.

[0034] Further, when the communication connection state of at least one of the heat pump units is normal and a start-up demand instruction is received, then the switching of the water pump is controlled according to the current operation mode by a ring temperature control strategy or a pressure control strategy, including:

[0035] When the communication connection state of at least one of the heat pump units is normal, then the reception of a start-up demand instruction is continuously monitored;

[0036] When no start demand instruction is received within the preset time, the on-off of the water pump is controlled by a rotation control strategy.

[0037] When a start demand instruction is received, the on-off of the water pump is controlled by a ring temperature control strategy or a pressure control strategy according to a current operation mode.

[0038] In a second aspect, an embodiment of the present application provides a heat pump system control device, which is used for a centralized control equipment, the centralized control equipment is in communication connection with at least one heat pump unit, the centralized control equipment is in communication connection with a water pump, the water pump is connected with the heat pump unit through a pipeline, and the device comprises:

[0039] a detection unit, which is used for detecting a communication connection state of the at least one heat pump unit;

[0040] a rotation unit, which is used for, when the communication connection states are all fault states, controlling the on-off of the water pump by a rotation control strategy, the rotation control strategy comprising controlling the water pump to be closed when an operation time of the water pump exceeds a first time threshold value within a preset time period, and controlling one water pump with the shortest operation time to be opened when the water pump is closed;

[0041] a ring control unit, which is used for, when the communication connection state of at least one heat pump unit is a normal state and a start demand instruction is received, controlling the on-off of the water pump by a ring temperature control strategy or a pressure control strategy according to a current operation mode.

[0042] Further, the ring control unit is further used for, when the communication connection state of at least one heat pump unit is a normal state and a start demand instruction is received, identifying the current operation mode;

[0043] when the current operation mode is identified as a heating mode, the on-off of the water pump is controlled by the ring temperature control strategy;

[0044] when the current operation mode is identified as a refrigeration mode, the on-off of the water pump is controlled by the pressure control strategy.

[0045] Further, the ring control unit is further used for, when the current operation mode is identified as the heating mode, performing operation fault detection on an environment temperature sensing device;

[0046] when it is detected that the environment temperature sensing device has an operation fault, the on-off of the water pump is controlled by the rotation control strategy;

[0047] when it is detected that the environment temperature sensing device is normal, the on-off of the water pump is controlled according to an environment temperature detected by the environment temperature sensing device and the ring temperature control strategy.

[0048] Further, the water pump comprises a main pump and a backup pump;

[0049] The environment control unit is further configured to acquire an environment temperature according to the environment temperature sensing device when it is detected that the environment temperature sensing device is operating normally.

[0050] When the environment temperature is less than or equal to a first temperature threshold, the main pump and the backup pump are both controlled to be turned on, the first temperature threshold is less than a target temperature value, and the target temperature value is included in a start-up demand instruction.

[0051] When the environment temperature is greater than a second temperature threshold and less than or equal to the target temperature value, any one of the water pumps is controlled to be turned on, the second temperature threshold is greater than the first temperature threshold and less than the target temperature value.

[0052] Further, the environment control unit is further configured to perform operating fault detection on the pressure sensing device when it is identified that the current operating mode is a refrigeration mode.

[0053] When it is detected that the pressure sensing device has an operating fault, the on-off control of the water pump is controlled by a round-robin control strategy.

[0054] When it is detected that the pressure sensing device is operating normally, the on-off control of the water pump is controlled according to a water pressure value detected by the pressure sensing device and a pressure control strategy.

[0055] Further, the water pump comprises a main pump and a backup pump;

[0056] The environment control unit is further configured to detect, when it is detected that the pressure sensing device is operating normally, a water outlet water pressure value and a return water water pressure value of the water pump by the pressure sensing device.

[0057] The water outlet water pressure value and the return water water pressure value are calculated to obtain a pressure difference value.

[0058] When the pressure difference value is less than or equal to a first pressure threshold, the main pump and the backup pump are both controlled to be turned on.

[0059] When the pressure difference value is greater than the first pressure threshold and less than or equal to a second pressure threshold, any one of the water pumps is controlled to be turned on.

[0060] When the pressure difference value is greater than the second pressure threshold, the on-off control of the water pump is controlled by a round-robin control strategy.

[0061] Further, the environment control unit is further configured to continuously monitor the reception of a start-up demand instruction when a communication connection state of at least one of the heat pump units is normal.

[0062] When no start demand instruction is received within the preset time, the switch of the water pump is controlled by the rotation control strategy;

[0063] When the start demand instruction is received, the switch of the water pump is controlled by the ring temperature control strategy or the pressure control strategy according to the current operation mode.

[0064] In a third aspect, an embodiment of the present application provides a heat pump system control device, comprising:

[0065] a memory and one or more processors;

[0066] the memory is configured to store one or more programs;

[0067] When the one or more programs are executed by the one or more processors, the one or more processors implement the heat pump system control method according to the first aspect.

[0068] In a fourth aspect, an embodiment of the present application provides a storage medium storing computer executable instructions, which, when executed by a computer processor, are configured to perform the heat pump system control method according to the first aspect.

[0069] The embodiments of the present application detect the communication connection states of at least one heat pump unit, when the communication connection states are all fault states, the switch of the water pump is controlled by the rotation control strategy, when the communication connection state of at least one heat pump unit is a normal state and a start demand instruction is received, the switch of the water pump is controlled by the ring temperature control strategy or the pressure control strategy according to the current operation mode. By using the above technical means, when the communication between the control device and the heat pump unit is faulty, the switch of the corresponding water pump is controlled by the rotation control strategy, so that the water in the pipeline between the water pump and the heat pump unit flows, thereby realizing the anti-freezing function in a low temperature environment and prolonging the service life of the heat pump system. In addition, when the control device and any heat pump unit have normal communication, the switch of the water pump is controlled according to the control strategy determined by the operation mode, thereby improving the intelligent degree of the heat pump system. BRIEF DESCRIPTION OF DRAWINGS

[0070] Figure 1 is a flow chart of a heat pump system control method provided by an embodiment of the present application;

[0071] Figure 2 is a connection schematic diagram of various devices in a heat pump system provided by an embodiment of the present application;

[0072] Figure 3 is a flow chart of another heat pump system control method provided by an embodiment of the present application;

[0073] Figure 4 is a structural schematic diagram of a heat pump system control device provided by an embodiment of the present application;

[0074] Figure 5 is a structural schematic diagram of a heat pump system control device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0075] In order to make the purposes, technical solutions and advantages of the present application clearer, the specific embodiments of the present application are described in further detail below in combination with the drawings. It can be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application. In addition, it should be noted that, for the convenience of description, only parts related to the present application are shown in the drawings, but not all contents. Before discussing the example embodiments in more detail, it should be mentioned that some example embodiments are described as processes or methods depicted as flowcharts. Although the flowcharts describe each operation (or step) as a sequential process, many of the operations can be implemented in parallel, concurrently or simultaneously. In addition, the order of the operations can be rearranged. The process can be terminated when its operations are completed, but can also have additional steps not included in the drawings. The process can correspond to a method, function, procedure, subroutine, subprogram, etc.

[0076] The heat pump system control method, device, equipment and storage medium provided by the present application aim to control the heat pump system. When communication failures exist in both the centralized control equipment and the heat pump unit, the on-off of the corresponding water pump is controlled by a rotating control strategy, so that water flows in the pipeline between the water pump and the heat pump unit, to realize the anti-freezing function in a low-temperature environment and prolong the service life of the heat pump system. In addition, when normal communication exists between the centralized control equipment and any heat pump unit, the on-off of the water pump is controlled according to the control strategy determined according to the operation mode, so as to improve the intelligent degree of the heat pump system. Compared with the traditional way of controlling the heat pump system, when the heat pump unit stops, the water pump is selected to be turned on at a fixed time to realize the anti-freezing of the pipeline. This way cannot make corresponding start-stop adjustment according to the changes of the terminal (heat pump unit), and the intelligent degree is low. Based on this, the heat pump system control method of the present application is provided to solve the problem of low intelligent degree in the existing heat pump system control process.

[0077] Figure 1 A flowchart of a heat pump system control method provided by an embodiment of the present application is given. The heat pump system control method provided in the embodiment can be executed by a heat pump system control device. The heat pump system control device can be realized by software and / or hardware. The heat pump system control device can be composed of two or more physical entities, or can be composed of one physical entity. Generally, the heat pump system control device can be a terminal device, such as a computer device, etc.

[0078] The following describes an example in which a computer device is the main body for executing a heat pump system control method. Referring to Figure 1 The heat pump system control method is used for a central control device, which is in communication connection with at least one heat pump unit and in communication connection with a water pump, and the water pump is connected with the heat pump unit through a pipeline. The heat pump system control method specifically includes the following steps.

[0079] S101, detecting a communication connection state of at least one heat pump unit.

[0080] Figure 2 is a connection diagram of various devices in a heat pump system provided by an embodiment of the present application. Referring to Figure 2 The heat pump system includes a central control device 10, a heat pump unit 11, and a water pump 12. The central control device 10 is in communication connection with the water pump 12 to control the on-off of the corresponding water pump 12 and to adjust the opening of the corresponding water pump 12. The central control device 10 is in communication connection with the heat pump unit 11 to receive a demand instruction sent by the heat pump unit 11, wherein the demand instruction includes a start demand instruction and a shutdown instruction, and the start demand instruction includes a water pump 12 opening instruction and corresponding demand temperature information. The heat pump unit 11 belongs to the terminal of the heat pump system, and the heat pump unit 11 includes an air disc 111, which has a heat exchanger. The heat pump unit 11 cools or heats air after the air passes through the cold water coil or the hot water coil through the air disc 111 to keep the temperature of the corresponding indoor room constant. The water pump 12 is connected with the heat pump unit 11 through a pipeline. The water pump 12 includes a water outlet and a water return, and the water pump 12 is connected with the heat pump unit 11 through the water outlet, and the air disc 111 of the heat pump unit 11 is connected with the water pump 12 through the water return. The pipeline corresponding to the water outlet and the water return is provided with a pressure sensing device 13.

[0081] When the heat pump system is powered on and started, the heat pump unit 11 performs a self-checking operation. The central control device 10 detects a communication connection state of at least one heat pump unit 11. It should be noted that the specific number of heat pump units 11 can be set according to actual needs. The central control device 10 controls the on-off of the water pump 12 according to the detected communication connection state. By detecting the communication connection state of the heat pump unit 11 after power-on and start, the central control device 10 can control the on-off of the water pump 12 when there is a fault in the communication connection state, so as to realize the functions of anti-freezing and the like and prolong the service life of the pipeline.

[0082] S102, when the communication connection state is a fault state, the on-off of the water pump is controlled through a round-robin control strategy, the round-robin control strategy includes controlling the water pump with a running time exceeding a first time threshold in a preset time period to be closed, and controlling the water pump with the shortest running time in the preset time period to be opened when the water pump is closed.

[0083] When it is detected that the communication connection state between the central control device and all heat pump units is a fault state, the central control device cannot receive the start demand instruction sent by any heat pump unit, at this time, the water pump cannot start according to the start demand instruction, and the pipeline between the heat pump unit and the water pump has no flowing water, only the water remaining in the pipeline after the last operation. At this time, when the environmental temperature is as low as the freezing point, the water remaining in the pipeline will freeze and break the pipeline. In order to prevent the pipeline from being broken by freezing, when it is detected that the communication connection state between the central control device and all heat pump units is a fault state, the on-off of the water pump is controlled by the rotation control strategy, so that there is flowing water between the water pump and the heat pump unit, thereby preventing the water in the pipeline from freezing when the environmental temperature is low, realizing the anti-freezing function, and prolonging the service life of the pipeline.

[0084] The rotation control strategy includes controlling the water pump with the running time exceeding the first time threshold in the preset time period to be closed, and controlling the water pump with the shortest running time in the preset time period to be opened when the water pump is closed. For example, assuming that there are water pump A and water pump B, when controlled by the rotation control strategy, assuming that the preset time is 30 minutes and the preset first time threshold is 20 minutes, in the past 30 minutes, water pump A has been running for 20 minutes and water pump B has been running for 3 minutes, water pump A is controlled to be closed, and water pump B is controlled to be opened when water pump A is closed.

[0085] For example, assuming that there are water pump A, water pump B and water pump C, when controlled by the rotation control strategy, assuming that the preset time is 30 minutes and the preset first time threshold is 20 minutes, in the past 30 minutes, water pump A has been running for 21 minutes, water pump B has been running for 25 minutes, and water pump C has not been running, according to the rotation control strategy, water pump A and water pump B are closed, and water pump C is controlled to be opened when closed.

[0086] It should be noted that the rotation control strategy includes opening only one water pump, that is, the rotation control strategy includes controlling all water pumps with the running time exceeding the first time threshold in the preset time period to be closed, and controlling the water pump with the shortest running time in the preset time period to be opened when the water pump is closed, wherein the number of water pumps opened is one, and the other water pumps are in the closed state.

[0087] In an embodiment, after the heat pump system is powered on and starts, when it is detected that the communication connection state of the control device with all heat pump units is a failure state, the control device cannot obtain the start demand instruction sent by the heat pump unit, at this time, the water pump cannot start according to the start demand instruction, and all water pumps are in a closed state, and there is no flowing water between the water pump and the heat pump unit, only the water remaining in the pipeline after the last operation. At this time, when the ambient temperature is as low as the freezing point, the water remaining in the pipeline will freeze and break the pipeline. In order to prevent the pipeline from being broken by ice, when it is detected that the communication connection state of the control device with all heat pump units is a failure state, the on-off of the water pump is controlled by a round-robin control strategy, so that there is flowing water between the water pump and the heat pump unit, thereby preventing the water in the pipeline from freezing when the ambient temperature is low, achieving the anti-freezing function, and prolonging the service life of the pipeline.

[0088] S103, when the communication connection state of at least one heat pump unit is normal, and the start demand instruction is received, the on-off of the water pump is controlled according to the current operation mode by the ring temperature control strategy or the pressure control strategy.

[0089] When it is detected that the communication connection state of the control device with at least one heat pump unit is normal, the control device can normally receive the communication signal sent by the corresponding heat pump unit to obtain the running state of the heat pump unit and the corresponding instruction interaction. At this time, when the control device receives the start demand instruction sent by the heat pump unit with which it has normal communication, the on-off of the water pump is controlled according to the current operation mode by the ring temperature control strategy or the pressure control strategy.

[0090] When it is detected that the communication connection state of the control device with at least one heat pump unit is normal, the control device can normally receive the communication signal sent by the corresponding heat pump unit to obtain the running state of the heat pump unit and the corresponding instruction interaction. At this time, the control device continuously detects the reception of the start demand instruction. When no start demand instruction is received within a preset time, the water pump is still in a closed state based on no start demand instruction, and there is no flowing water between the water pump and the heat pump unit, only the water remaining in the pipeline after the last operation. At this time, when the ambient temperature is as low as the freezing point, the water remaining in the pipeline will freeze and break the pipeline. In order to prevent the pipeline from being broken by ice, when it is detected that the communication connection state of the control device with at least one heat pump unit is normal, and no start demand instruction is received within a preset time, the on-off of the water pump is controlled by a round-robin control strategy, so that there is flowing water between the water pump and the heat pump unit, thereby preventing the water in the pipeline from freezing when the ambient temperature is low, achieving the anti-freezing function, and prolonging the service life of the pipeline.

[0091] It should be noted that after the shift control strategy control based on that no start demand instruction is received within the preset time, the centralized control device will continue to detect the reception of the start demand instruction, and when the start demand instruction is received, the switch of the water pump is controlled according to the current operation mode through the ring temperature control strategy or the pressure control strategy.

[0092] When it is detected that the communication connection state of the centralized control device and the at least one heat pump unit is a normal state, and the start demand instruction is received, the current operation mode is identified. When it is identified that the current operation mode is the heating mode, the switch of the water pump is controlled through the ring temperature control strategy.

[0093] In an embodiment, when it is detected that the communication connection state of the centralized control device and the at least one heat pump unit is a normal state, and the start demand instruction is received, the current operation mode is identified. When it is identified that the current operation mode is the heating mode, the fault detection of the environment temperature sensing device is performed. When it is detected that the environment temperature sensing device has a fault, the environment temperature of the regulated environment corresponding to the heat pump unit cannot be obtained, and thus the energy supply demand cannot be determined, so that the heat pump unit is stopped, and the corresponding water pump is in the closed state. At this time, there is no flowing water flow between the water pump and the heat pump unit, and only the water remaining in the pipeline after the last operation. At this time, when the environment temperature is as low as the freezing point, the water remaining in the pipeline will freeze and break the pipeline. In order to avoid the pipeline being broken by freezing, when it is detected that the environment temperature sensing device has a fault, the switch of the water pump is controlled through the shift control strategy, so that there is a flowing water flow between the water pump and the heat pump unit, thereby preventing the water in the pipeline from freezing when the environment temperature is low, realizing the anti-freezing function, and prolonging the service life of the pipeline.

[0094] In an embodiment, when it is detected that the communication connection state of the centralized control device and the at least one heat pump unit is a normal state, and the start demand instruction is received, the current operation mode is identified. When it is identified that the current operation mode is the heating mode, the fault detection of the environment temperature sensing device is performed. When it is detected that the environment temperature sensing device has a fault, the environment temperature of the regulated environment corresponding to the heat pump unit cannot be obtained, and thus the energy supply demand cannot be determined, so that the heat pump unit is stopped, and the corresponding water pump is in the closed state. At this time, there is no flowing water flow between the water pump and the heat pump unit, and only the water remaining in the pipeline after the last operation. At this time, when the environment temperature is as low as the freezing point, the water remaining in the pipeline will freeze and break the pipeline. In order to avoid the pipeline being broken by freezing, when it is detected that the environment temperature sensing device has a fault, the switch of the water pump is controlled through the shift control strategy, so that there is a flowing water flow between the water pump and the heat pump unit, thereby preventing the water in the pipeline from freezing when the environment temperature is low, realizing the anti-freezing function, and prolonging the service life of the pipeline.

[0095] The water pump comprises at least one main pump and a standby pump. For example, Figure 2As shown, water pump A and water pump B are main pumps, and water pump C is a backup pump. When it is detected that the ambient temperature sensing device is operating normally, the ambient temperature is obtained according to the ambient temperature sensing device, and when the ambient temperature is less than or equal to a first temperature threshold, the first temperature threshold can be set to be much less than the target temperature value. At this time, only one water pump is started, and the temperature rises relatively slowly, and therefore the main pump and the backup pump need to be controlled to be started to speed up the heating and improve the heating efficiency. It should be noted that the target temperature value is a target ambient temperature that the heat pump unit needs to reach, and the target temperature value is generally included in the corresponding start demand instruction. For example, assuming that the target temperature value is 25°C, and the first temperature threshold is -15°C, the lower the ambient temperature, the greater the required heat source, and when it is detected that the ambient temperature is less than or equal to 15°C, that is, the ambient temperature reaches 15°C, the main pump and the backup pump can be started at the same time to speed up the supply of the heat source. Therefore, when the ambient temperature is less than or equal to the first temperature threshold, the main pump and the backup pump are controlled to be started by the control device.

[0096] It should be noted that the main pump can be one or more, and the backup pump is generally one. The control device can control one main pump and one backup pump to be started, or can control all main pumps and backup pumps to be started.

[0097] The water pump includes at least one main pump and a backup pump. For example, as shown in the figure, Figure 2 As shown, water pump A and water pump B are main pumps, and water pump C is a backup pump. When it is detected that the ambient temperature sensing device is operating normally, the ambient temperature is obtained according to the ambient temperature sensing device, and when the ambient temperature is less than or equal to a first temperature threshold, the first temperature threshold can be set to be much less than the target temperature value. At this time, only one water pump is started, and the temperature rises relatively slowly, and therefore the main pump and the backup pump need to be controlled to be started to speed up the heating and improve the heating efficiency. It should be noted that the target temperature value is a target ambient temperature that the heat pump unit needs to reach, and the target temperature value is generally included in the corresponding start demand instruction. For example, assuming that the target temperature value is 25°C, and the first temperature threshold is -15°C, the lower the ambient temperature, the greater the required heat source, and when it is detected that the ambient temperature is less than or equal to 15°C, that is, the ambient temperature reaches 15°C, the main pump and the backup pump can be started at the same time to speed up the supply of the heat source. Therefore, when the ambient temperature is less than or equal to the first temperature threshold, the main pump and the backup pump are controlled to be started by the control device.

[0098] It should be noted that the main pump can be one or more, and the backup pump is generally one. The control device can control one main pump and one backup pump to be started, or can control all main pumps and backup pumps to be started.

[0099] In an embodiment, when it is detected that the environment temperature sensing device is in normal operation, the environment temperature is obtained according to the environment temperature sensing device, and when the environment temperature is greater than the second temperature threshold value and less than or equal to the target temperature value, any one water pump is controlled to be turned on according to the round value control strategy.

[0100] When it is detected that the environment temperature sensing device is in normal operation, the environment temperature is obtained according to the environment temperature sensing device, and when the environment temperature is greater than the first temperature threshold value and less than or equal to the second temperature threshold value, the current state of the water pump is maintained until the environment temperature is greater than the second temperature threshold value, any one water pump is controlled to be turned on, and the other water pumps are controlled to be turned off, so as to gradually increase the temperature and save energy.

[0101] In an embodiment, when it is detected that the communication connection state between the central control device and at least one heat pump unit is normal, and a start demand instruction is received, the current operation mode is identified. When it is identified that the current operation mode is a refrigeration mode, the pressure sensing device is detected for fault. When it is detected that the pressure sensing device has a fault, the outlet water pressure value and the return water pressure value of the water pump cannot be obtained, and thus the water pump cannot be controlled to be turned on or turned off through the pressure control strategy, so that the corresponding water pump is in a turned-off state. At this time, there is no flowing water between the water pump and the heat pump unit, and only the water remaining in the pipeline after the last operation. At this time, when the environment temperature is low to the freezing point, the water remaining in the pipeline will freeze and break the pipeline. In order to avoid the pipeline being broken by freezing, when it is detected that the pressure sensing device has a fault, the water pump is controlled to be turned on or turned off through the round value control strategy, so that there is flowing water between the water pump and the heat pump unit, thereby preventing the water in the pipeline from freezing when the environment temperature is low, achieving the anti-freezing function, and prolonging the service life of the pipeline.

[0102] In an embodiment, when it is detected that the communication connection state between the central control device and at least one heat pump unit is normal, and a start demand instruction is received, the current operation mode is identified. When it is identified that the current operation mode is a refrigeration mode, the pressure sensing device is detected for fault. When it is detected that the pressure sensing device is in normal operation, the water pressure value of the water pump is detected through the pressure sensing device, and thus the water pump can be controlled to be turned on or turned off according to the water pressure value detected by the pressure sensing device and the ambient temperature control strategy.

[0103] The water pump includes at least one main pump and a standby pump. For example, as shown in FIG. 1, the water pump A and the water pump B are main pumps, and the water pump C is a standby pump. Figure 2 When it is detected that the pressure sensing device is in normal operation, the outlet water pressure value and the return water pressure value of the water pump are detected according to the pressure sensing device, and thus the water pump can be controlled to be turned on or turned off according to the water pressure value detected by the pressure sensing device and the ambient temperature control strategy. Figure 2As shown, the pressure sensing device 13 is arranged on the pipeline corresponding to the water outlet and the water return port of the water pump 12. The pressure sensing device 13 arranged at the water outlet end is generally a high-pressure gauge, and the water outlet pressure value is generally a high-pressure value. The pressure sensing device 13 arranged at the water return port end is generally a low-pressure gauge, and the water return pressure value is generally a low-pressure value. According to the calculation and processing of the water outlet pressure value and the water return pressure value, the differential pressure value can be obtained by subtracting the water return pressure value from the water outlet pressure value. When the differential pressure value is less than or equal to the first pressure threshold value, the first pressure threshold value can be set to be much smaller than the target differential pressure value. At this time, only one water pump is started, and the refrigeration is relatively slow. Therefore, the main pump and the standby pump need to be started to speed up the refrigeration and improve the refrigeration efficiency. For example, assuming that the first pressure threshold value is 2.0 bar, when the differential pressure value is low, the flow rate of the terminal (heat pump unit) may be too small to meet the refrigeration demand. When the differential pressure value is detected to be less than or equal to 2.0 bar, the main pump and the standby pump can be started at the same time to speed up the refrigeration supply. Therefore, when the differential pressure value is less than or equal to the first pressure threshold value, the control device controls the main pump and the standby pump to be started.

[0104] It should be noted that the main pump can be one or more, and the standby pump is generally one. The control device can control one main pump and one standby pump to be started, or all main pumps and standby pumps to be started.

[0105] The judgment conditions for controlling the number of water pumps started in the heating mode and the refrigeration mode provided by the embodiment are different. In the heating mode, the number of water pumps started is determined by the ambient temperature condition. Compared with the prior art in which whether to start the water pump is determined by the preset temperature value set by the user, the application can avoid the parameter setting error caused by the improper temperature set by the user, and can reasonably control the number of water pumps started by the ambient temperature condition, thereby improving the intelligence of the water pump start control. In the refrigeration mode, the number of water pumps started is determined by the pressure condition. Compared with the ambient temperature condition, the pressure condition (differential pressure) in the refrigeration mode can better meet the user's demand, thereby improving the accuracy of the water pump start control and the accuracy of the cold water flow rate control, and further accurately adjusting the air temperature to the target temperature set by the user, thereby improving the user experience.

[0106] It should be noted that in the refrigeration mode, the cold water and air in the wind disc perform heat exchange. When the user demand temperature is lower, the cold water flow rate in the fin heat exchanger in the wind disc needs to be faster, so that the cold water in the fin heat exchanger can maintain a constant low temperature.

[0107] It should be noted that in the refrigeration mode, the air is driven by the air disc and exchanges heat with the fin heat exchanger in the air disc, and the cold water will absorb the heat of the air. If the flow rate of the cold water in the fin heat exchanger is not fast, the cold water may continue to heat up. If the temperature of the cold water increases, the temperature difference between the air and the cold water is smaller, and the heat exchange efficiency is relatively low. Therefore, the cold water needs to be kept at a constant low temperature state to have a higher heat exchange efficiency. In order to keep the cold water at a constant low temperature state, when the pressure difference is less than or equal to the first pressure threshold, the number of water pumps opened can be increased to increase the outlet water pressure of the pipeline, so as to increase the pressure difference of the pipeline. Based on the increase of the pressure difference of the pipeline, the flow rate of the cold water in the pipeline is also increased, so that the fin heat exchanger of the air disc can obtain the cold water flowing from the water pump faster, and the cold water in the fin heat exchanger of the air disc can be kept at a constant low temperature state to improve the heat exchange efficiency of the cold water and the air.

[0108] In summary, by using the pressure difference judgment method in the refrigeration mode, the target temperature set by the user can be accurately achieved. Compared with the existing method of reducing the target outlet water temperature to the target temperature set by the user, the water pump opening number is determined by the pressure difference in the present embodiment, which can make the heat pump system reach the target temperature set by the user faster, or can meet the cooling demand of the user faster, thereby improving the working efficiency of the heat pump system control, and improving the user experience.

[0109] The water pump includes at least one main pump and a standby pump. For example, as shown in Figure 2 Water pump A and water pump B are main pumps, and water pump C is a standby pump. When it is detected that the pressure sensing device is operating normally, the outlet water pressure value and the return water pressure value of the water pump are detected according to the pressure sensing device, and the number of water pumps opened is determined according to the outlet water pressure value and the return water pressure value of the water pump. Figure 2As shown, the pressure sensing devices 13 are arranged on the pipes corresponding to the water outlet and the water return of the water pump 12. The pressure sensing device 13 arranged at the water outlet end is generally a high-pressure gauge, and the water outlet pressure value is generally a high-pressure value. The pressure sensing device 13 arranged at the water return end is generally a low-pressure gauge, and the water return pressure value is generally a low-pressure value. The differential pressure value is obtained by calculating and processing the water outlet pressure value and the water return pressure value. When the differential pressure value is greater than the first pressure threshold value and less than or equal to the second pressure threshold value, any one of the water pumps is controlled to be turned on, and the other water pumps are controlled to be turned off. When the differential pressure value is greater than the first pressure threshold value and less than or equal to the second temperature threshold value, only one water pump can be controlled to be turned on to gradually cool to save energy. The water pump that is turned on can be a main pump or a standby pump. For example, assuming that the first pressure threshold value is 2.0 bar and the second pressure threshold value is 2.5 bar, when the differential pressure value is greater than the first pressure threshold value 2.0 bar and less than or equal to the second pressure threshold value 2.5 bar, for example, the differential pressure value is 2.2 bar, only one of the water pumps is controlled to be turned on, and the other water pumps are controlled to be turned off, thereby achieving the effect of energy saving and continuously cooling.

[0110] It should be noted that controlling only one of the water pumps to be turned on can be controlling one of the main pumps to be turned on or controlling one of the standby pumps to be turned on.

[0111] The water pump includes at least one main pump and a standby pump. For example, Figure 2 As shown, the water pump A and the water pump B are main pumps, and the water pump C is a standby pump. When it is detected that the pressure sensing device is operating normally, the water outlet pressure value and the water return pressure value of the water pump are detected according to the pressure sensing device, and Figure 2 As shown, the pressure sensing devices 13 are arranged on the pipes corresponding to the water outlet and the water return of the water pump 12. The pressure sensing device 13 arranged at the water outlet end is generally a high-pressure gauge, and the water outlet pressure value is generally a high-pressure value. The pressure sensing device 13 arranged at the water return end is generally a low-pressure gauge, and the water return pressure value is generally a low-pressure value. The differential pressure value is obtained by calculating and processing the water outlet pressure value and the water return pressure value. When the differential pressure value is greater than the first pressure threshold value and less than or equal to the second pressure threshold value, any one of the water pumps is controlled to be turned on, and the other water pumps are controlled to be turned off. When the differential pressure value is greater than the first pressure threshold value and less than or equal to the second temperature threshold value, only one water pump can be controlled to be turned on to gradually cool to save energy. The water pump that is turned on can be a main pump or a standby pump. For example, assuming that the first pressure threshold value is 2.0 bar and the second pressure threshold value is 2.5 bar, when the differential pressure value is greater than the first pressure threshold value 2.0 bar and less than or equal to the second pressure threshold value 2.5 bar, for example, the differential pressure value is 2.2 bar, only one of the water pumps is controlled to be turned on, and the other water pumps are controlled to be turned off, thereby achieving the effect of energy saving and continuously cooling.

[0112] It should be noted that when the water pump includes at least one main pump and a standby pump, controlling any one of the water pumps to be turned on according to the round-robin control strategy can be controlling the main pump and the standby pump to be turned on in turn according to the round-robin control strategy.

[0113] The above method can determine whether to start one water pump or multiple water pumps according to the change of the ambient temperature or the terminal pressure, thereby greatly reducing the redundant power consumption of the water pump, achieving the energy-saving effect, and improving the overall intelligent level of the heat pump system.

[0114] In another aspect, referring to Figure 3 , another heat pump system control method is provided. The heat pump system control method corresponds to the above central control device, and the flow of the heat pump system control method comprises:

[0115] S201, whether the central control device has no communication failure with at least one heat pump unit.

[0116] Determine whether the central control device has no communication failure with at least one heat pump unit. If yes, the central control device and at least one heat pump unit communicate normally, and S202 is executed; if no, the central control device and all heat pump units have communication failure, and S203 is executed.

[0117] S202, whether the start demand instruction sent by the heat pump unit is received.

[0118] Determine whether the central control device receives the start demand instruction sent by the heat pump unit. If yes, the central control device receives the start demand instruction sent by the heat pump unit in normal communication with it, and S204 is executed; if no, the central control device does not receive the start demand instruction sent by the heat pump unit in normal communication with it within a preset time interval, i.e. the corresponding heat pump unit has no start demand, and S203 is executed.

[0119] S203, start one water pump according to the rotation control strategy.

[0120] Start one water pump according to the rotation control strategy, wherein the rotation control strategy is the same as the above, and is not repeated here.

[0121] S204, determine whether the current operation mode is heating mode.

[0122] Determine whether the current operation mode is heating mode. If yes, the current operation mode is heating mode, and S205-209 are executed; if no, the current operation mode is cooling mode, and S210-S212 are executed.

[0123] S205, determine whether the environment temperature sensing device is fault-free.

[0124] Determine whether the environment temperature sensing device is fault-free. If yes, the environment temperature sensing device is detected to be in normal operation, and S206 is executed; if no, the environment temperature sensing device has failure, and S203 is executed.

[0125] S206, determine whether the ambient temperature is less than or equal to the first temperature threshold.

[0126] determining whether the ambient temperature is less than or equal to a first temperature threshold, for example, the first temperature threshold is set to -15℃, if yes, i.e. whether the ambient temperature is less than or equal to the first temperature threshold -15℃, then performing S207; if no, i.e. the ambient temperature is greater than the first temperature threshold -15℃, then performing S208.

[0127] S207, controlling the main pump and the standby pump to be turned on at the same time.

[0128] S208, determining whether the ambient temperature is greater than a second temperature threshold.

[0129] determining whether the ambient temperature is greater than the second temperature threshold, for example, the second temperature threshold is set to -5℃, if yes, i.e. the ambient temperature is greater than the second temperature threshold -5℃, then performing S203; if no, i.e. the ambient temperature is greater than the first temperature threshold -15℃ and less than or equal to the second temperature threshold -5℃, then performing S209.

[0130] S209, maintaining the current running state of the water pump.

[0131] if the ambient temperature is greater than the first temperature threshold -15℃ and less than or equal to the second temperature threshold -5℃, then maintaining the current running state of the water pump; if there is at least one water pump turned on at present, then maintaining the current turned-on state. If all the water pumps are turned off, then performing S203.

[0132] S210, determining whether the pressure sensing device is fault-free.

[0133] if the current running mode is the refrigeration mode, then determining whether the pressure sensing device is fault-free, if yes, i.e. the pressure sensing device is running normally, then performing S211; if no, i.e. the pressure sensing device has a fault, then performing S203.

[0134] S211, determining whether the pressure difference value is less than or equal to a first pressure threshold.

[0135] when the pressure sensing device is running normally, then the outlet water pressure value and the return water pressure value of the water pump can be detected by the pressure sensing device, and the pressure difference value can be obtained according to the difference between the outlet water pressure value and the return water pressure value. Determining whether the pressure difference value is less than or equal to the first pressure threshold, for example, the first pressure threshold is set to 2.0bar, if yes, i.e. the pressure difference value is less than or equal to the first pressure threshold 2.0bar, then performing S207; if no, i.e. the pressure difference value is greater than the first pressure threshold 2.0bar, then performing S212.

[0136] S212, determining whether the pressure difference value is greater than a second pressure threshold.

[0137] If the pressure difference is greater than the first pressure threshold 2.0 bar, it is determined whether the pressure difference is greater than a second pressure threshold, assuming that the second pressure threshold is set to 2.5 bar, if yes, that is, whether the pressure difference is greater than the second pressure threshold 2.5 bar, S203 is executed; if no, that is, the pressure difference is greater than the first pressure threshold 2.0 bar and less than or equal to the second pressure threshold 2.5 bar, S209 is executed.

[0138] The above, by detecting the communication connection state of at least one heat pump unit, when the communication connection state is all fault state, then through the rotation control strategy to control the switch of the water pump, when the communication connection state of at least one heat pump unit is normal state, and receive the start demand instruction, then according to the current operation mode through the ring temperature control strategy or pressure control strategy to control the switch of the water pump. By using the above technical means, when the communication fault exists between the centralized control equipment and the heat pump unit, the switch of the corresponding water pump is controlled through the rotation control strategy, so that the water flow exists in the pipeline between the water pump and the heat pump unit, thereby realizing the anti-freezing function in low temperature environment and prolonging the service life of the heat pump system. In addition, when normal communication exists between the centralized control equipment and any heat pump unit, the switch of the water pump is controlled according to the control strategy determined according to the operation mode, thereby improving the intelligent degree of the heat pump system.

[0139] On the basis of the above embodiment, Figure 4 A structural schematic diagram of a heat pump system control device provided by the embodiment of the application is provided. Referring to Figure 4 The heat pump system control device provided by the embodiment is used for a centralized control equipment, the centralized control equipment is in communication connection with at least one heat pump unit, the centralized control equipment is in communication connection with a water pump, and the water pump is connected with the heat pump unit through a pipeline. The heat pump system control device provided by the embodiment specifically comprises a detection unit 21, a rotation unit 22 and a ring control unit 23.

[0140] The detection unit 21 is used for detecting the communication connection state of at least one heat pump unit.

[0141] The rotation unit 22 is used for controlling the switch of the water pump through the rotation control strategy when the communication connection state is all fault state, and the rotation control strategy comprises controlling the water pump with a running time exceeding a first time threshold in a preset time period to be closed, and controlling one water pump with the shortest running time in the preset time period to be opened when the water pump is closed.

[0142] The ring control unit 23 is used for controlling the switch of the water pump through the ring temperature control strategy or the pressure control strategy according to the current operation mode when the communication connection state of at least one heat pump unit is normal state and a start demand instruction is received.

[0143] Further, the environment control unit 23 is further configured to identify the current operation mode when the communication connection state of the at least one heat pump unit is normal and the start demand instruction is received;

[0144] When it is identified that the current operation mode is the heating mode, the switch of the water pump is controlled by the ring temperature control strategy.

[0145] When it is identified that the current operation mode is the cooling mode, the switch of the water pump is controlled by the pressure control strategy.

[0146] Further, the environment control unit 23 is further configured to, when it is identified that the current operation mode is the heating mode, detect an operation fault of the environment temperature sensing device.

[0147] When it is detected that the environment temperature sensing device has an operation fault, the switch of the water pump is controlled by the round value control strategy.

[0148] When it is detected that the environment temperature sensing device is normal, the switch of the water pump is controlled according to the environment temperature detected by the environment temperature sensing device and the ring temperature control strategy.

[0149] Further, the water pump includes a main pump and a standby pump.

[0150] The environment control unit 23 is further configured to, when it is detected that the environment temperature sensing device is normal, acquire the environment temperature from the environment temperature sensing device.

[0151] When the environment temperature is less than or equal to a first temperature threshold, the main pump and the standby pump are controlled to be turned on, the first temperature threshold is less than a target temperature value, and the target temperature value is included in the start demand instruction.

[0152] When the environment temperature is greater than a second temperature threshold and less than or equal to the target temperature value, any one of the water pumps is controlled to be turned on, the second temperature threshold is greater than the first temperature threshold and less than the target temperature value.

[0153] Further, the environment control unit 23 is further configured to, when it is identified that the current operation mode is the cooling mode, detect an operation fault of the pressure sensing device.

[0154] When it is detected that the pressure sensing device has an operation fault, the switch of the water pump is controlled by the round value control strategy.

[0155] When it is detected that the pressure sensing device is normal, the switch of the water pump is controlled according to the water pressure value detected by the pressure sensing device and the pressure control strategy.

[0156] Further, the water pump includes a main pump and a standby pump.

[0157] The ring control unit 23 is further configured to detect the outlet water pressure value and the return water pressure value of the water pump through the pressure sensing device when it is detected that the pressure sensing device is operating normally.

[0158] The outlet water pressure value and the return water pressure value are subjected to calculation processing to obtain a pressure difference value.

[0159] When the pressure difference value is less than or equal to a first pressure threshold value, the main pump and the standby pump are both controlled to be turned on.

[0160] When the pressure difference value is greater than the first pressure threshold value and less than or equal to a second pressure threshold value, any one of the water pumps is controlled to be turned on.

[0161] When the pressure difference value is greater than the second pressure threshold value, the on-off of the water pump is controlled through a rotation control strategy.

[0162] Further, the ring control unit 23 is further configured to continuously monitor the reception of a start demand instruction when the communication connection state of at least one of the heat pump units is normal.

[0163] When no start demand instruction is received within a preset time, the on-off of the water pump is controlled through a rotation control strategy.

[0164] When a start demand instruction is received, the on-off of the water pump is controlled according to the current operation mode through a ring temperature control strategy or a pressure control strategy.

[0165] The above-mentioned communication connection state of at least one heat pump unit is detected, when the communication connection state of all the heat pump units is a fault state, the on-off of the water pump is controlled through a rotation control strategy, when the communication connection state of at least one heat pump unit is normal and a start demand instruction is received, the on-off of the water pump is controlled according to the current operation mode through a ring temperature control strategy or a pressure control strategy. By using the above technical means, when the communication between the centralized control device and the heat pump unit fails, the on-off of the corresponding water pump is controlled through a rotation control strategy, so that there is flowing water in the pipeline between the water pump and the heat pump unit, thereby realizing the anti-freezing function in a low temperature environment and prolonging the service life of the heat pump system. In addition, when the communication between the centralized control device and any heat pump unit is normal, the on-off of the water pump is controlled according to the control strategy determined according to the operation mode, thereby improving the intelligent degree of the heat pump system.

[0166] The heat pump system control device provided by the embodiments of the present application can be used to execute the heat pump system control method provided by the above-mentioned embodiments, and has corresponding functions and beneficial effects.

[0167] The embodiments of the present application provide a heat pump system control device, which is described with reference to Figure 5The heat pump system control device includes a processor 31, a memory 32, a communication module 33, an input device 34, and an output device 35. The number of processors in the heat pump system control device can be one or more, and the number of memories in the heat pump system control device can be one or more. The processor, the memory, the communication module, the input device, and the output device of the heat pump system control device can be connected through a bus or other means.

[0168] The memory 32, as a computer readable storage medium, can be used to store software programs, computer executable programs, and modules, such as program instructions / modules corresponding to the heat pump system control method according to any embodiment of the present application (for example, the detection unit, the shift unit, and the HVAC unit in the heat pump system control device). The memory can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system and application programs required by at least one function; and the data storage area can store data created according to the use of the device, etc. In addition, the memory can include a high-speed random access memory, and can also include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other non-volatile solid-state memory device. In some examples, the memory can further include a memory remotely arranged with respect to the processor, and these remote memories can be connected to the device through a network. Examples of the above network include but are not limited to the Internet, an intranet, a local area network, a mobile communication network, and a combination thereof.

[0169] The communication module 33 is used for data transmission.

[0170] The processor 31 executes various functional applications and data processing of the device by running the software programs, instructions, and modules stored in the memory, that is, implements the heat pump system control method described above.

[0171] The input device 34 can be used to receive input digital or character information, and to generate key signal input related to user settings and function control of the device. The output device 35 can include a display device such as a display screen.

[0172] The heat pump system control device provided above can be used to execute the heat pump system control method provided in the above embodiments, and has corresponding functions and beneficial effects.

[0173] The embodiment of the present application further provides a storage medium storing computer executable instructions, which, when executed by a computer processor, are used to perform a heat pump system control method, the heat pump system control method comprising: detecting communication connection states of at least one heat pump unit; when the communication connection states are all failure states, then controlling opening and closing of water pumps through a shift control strategy, the shift control strategy comprising controlling the water pumps with running times exceeding a first time threshold in a preset time period to be closed, and controlling one water pump with the shortest running time in the preset time period to be opened when the water pumps are closed; when the communication connection state of at least one heat pump unit is a normal state, and a start demand instruction is received, then controlling opening and closing of water pumps through a ring temperature control strategy or a pressure control strategy according to a current operation mode.

[0174] Storage medium - any of various types of memory devices or storage devices. The term "storage medium" is intended to include an installation medium, e.g., a CD-ROM, floppy disks, or tape device; a computer system memory or random access memory such as DRAM, DDR RAM, SRAM, EDO RAM, Rambus RAM, etc.; a non-volatile memory such as a magnetic medium (e.g., a hard drive or optical storage); registers or other similar types of memory elements upon which a computer programs can be maintained. The storage medium can also include other types of storage. Moreover, the storage medium can be located in a first computer system in which the programs are executed, or can be located in a second different computer system which connects to the first computer system over a network such as the Internet. The second computer system can provide program instructions to the first computer for execution. The term "storage medium" can include two or more storage mediums that reside in different locations, e.g., in different computer systems that are connected over a network. The storage medium can store program instructions (e.g., as an installed program) that can be executed by one or more processors.

[0175] Of course, the storage medium storing computer executable instructions provided by the embodiment of the present application is not limited to the heat pump system control method as described above, and can also perform the related operations in the heat pump system control method provided by any embodiment of the present application.

[0176] The heat pump system control device, the storage medium and the heat pump system control equipment provided in the above embodiments can execute the heat pump system control method provided by any embodiment of the present application, and the technical details not described in detail in the above embodiments can be referred to the heat pump system control method provided by any embodiment of the present application.

[0177] The above merely describes the preferred embodiments of the present application and the technical principles applied. The present application is not limited to the specific embodiments described herein, and various obvious changes, modifications and replacements made by those skilled in the art without departing from the scope of the present application shall not be excluded. Therefore, although the present application is described in more detail through the above embodiments, the present application is not limited to the above embodiments, and more other equivalent embodiments can be included without departing from the concept of the present application, and the scope of the present application is determined by the scope of the claims.

Claims

1. A heat pump system control method characterized by, The utility model relates to a control method for a central control device, the central control device is connected with at least one heat pump unit, the central control device is connected with a water pump, the water pump is connected with the heat pump unit through a pipeline, the method comprises: Detecting the communication connection state of at least one heat pump unit; When the communication connection state of at least one heat pump unit is normal, and a start demand instruction is received, then the switch of the water pump is controlled according to the current operation mode through the ring temperature control strategy or the pressure control strategy. When the communication connection state of at least one heat pump unit is normal, and a start demand instruction is received, then the switch of the water pump is controlled according to the current operation mode through the ring temperature control strategy or the pressure control strategy.

2. The method of claim 1, wherein, When the communication connection state of at least one heat pump unit is normal, and a start demand instruction is received, then the switch of the water pump is controlled according to the current operation mode through the ring temperature control strategy or the pressure control strategy. When the communication connection state of at least one heat pump unit is normal, and a start demand instruction is received, then the switch of the water pump is controlled according to the current operation mode through the ring temperature control strategy or the pressure control strategy. When the communication connection state of at least one heat pump unit is normal, and a start demand instruction is received, then the switch of the water pump is controlled according to the current operation mode through the ring temperature control strategy or the pressure control strategy. The water pump comprises a main pump and a standby pump.

3. The method of claim 2, wherein, When the communication connection state of at least one heat pump unit is normal, and a start demand instruction is received, then the switch of the water pump is controlled according to the current operation mode through the ring temperature control strategy or the pressure control strategy. When the communication connection state of at least one heat pump unit is normal, and a start demand instruction is received, then the switch of the water pump is controlled according to the current operation mode through the ring temperature control strategy or the pressure control strategy. When the communication connection state of at least one heat pump unit is normal, and a start demand instruction is received, then the switch of the water pump is controlled according to the current operation mode through the ring temperature control strategy or the pressure control strategy. When the communication connection state of at least one heat pump unit is normal, and a start demand instruction is received, then the switch of the water pump is controlled according to the current operation mode through the ring temperature control strategy or the pressure control strategy.

4. The method of claim 3, wherein, When the communication connection state of at least one heat pump unit is normal, and a start demand instruction is received, then the switch of the water pump is controlled according to the current operation mode through the ring temperature control strategy or the pressure control strategy. When the communication connection state of at least one heat pump unit is normal, and a start demand instruction is received, then the switch of the water pump is controlled according to the current operation mode through the ring temperature control strategy or the pressure control strategy. ​ ​ ​ 5. The method of claim 2, wherein, ​ ​ ​ When it is detected that the pressure sensing device is operating normally, then the opening and closing of the water pump is controlled according to the water pressure value detected by the pressure sensing device and the pressure control strategy.

6. The method of claim 5, wherein, The water pump comprises a main pump and a backup pump. When it is detected that the pressure sensing device is operating normally, then the opening and closing of the water pump is controlled according to the water pressure value detected by the pressure sensing device and the pressure control strategy. When it is detected that the pressure sensing device is operating normally, then the outlet water pressure value and the return water pressure value of the water pump are detected by the pressure sensing device. The outlet water pressure value and the return water pressure value are calculated to obtain a pressure difference value. When the pressure difference value is less than or equal to a first pressure threshold, then the main pump and the backup pump are both turned on. When the pressure difference value is greater than the first pressure threshold and less than or equal to a second pressure threshold, then any one of the water pumps is turned on. When the pressure difference value is greater than the second pressure threshold, then the opening and closing of the water pump is controlled by a round-robin control strategy.

7. The method of claim 1, wherein, When the communication connection state of at least one of the heat pump units is normal and a start demand instruction is received, then the opening and closing of the water pump is controlled by a ring temperature control strategy or a pressure control strategy according to the current operating mode. When the communication connection state of at least one of the heat pump units is normal, then the reception of a start demand instruction is continuously monitored. When no start demand instruction is received within a preset time, then the opening and closing of the water pump is controlled by a round-robin control strategy. When a start demand instruction is received, then the opening and closing of the water pump is controlled by a ring temperature control strategy or a pressure control strategy according to the current operating mode.

8. A heat pump system control device characterized by comprising: The device is used for a centralized control device, the centralized control device is in communication connection with at least one heat pump unit, the centralized control device is in communication connection with a water pump, the water pump is connected with the heat pump unit through a pipeline, and the device comprises: A detection unit is configured to detect the communication connection state of at least one heat pump unit. A round-robin unit is configured to control the opening and closing of the water pump by a round-robin control strategy when the communication connection state of at least one heat pump unit is a fault state, the round-robin control strategy comprising controlling the water pump with a running time exceeding a first time threshold to be turned off within a preset time period, and controlling the water pump with the shortest running time to be turned on when the water pump is turned off. A ring control unit is configured to control the opening and closing of the water pump by a ring temperature control strategy or a pressure control strategy according to the current operating mode when the communication connection state of at least one heat pump unit is normal and a start demand instruction is received.

9. A heat pump system control device characterized by comprising: Comprise: A memory and one or more processors; The memory is configured to store one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors implement the method of any one of claims 1-7.

10. A storage medium storing computer-executable instructions, wherein: The computer executable instructions, when executed by a processor, are used to perform the method of any one of claims 1-7.

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