Air source heat pump control system with energy storage function

Abstract

The invention relates to the technical field of heat pump control, in particular to an air source heat pump control system with an energy storage function. The system comprises an air source heat pump system, an energy storage system, a hydraulic module and a tail end system, the air source heat pump system, the energy storage system, the hydraulic module and the tail end system are connected through a variable flow conveying system, and the air source heat pump system and the energy storage system are connected and conduct mutual heat conversion. According to the system, heat is generated according to the tail end load, all generated heat enters the system, the energy efficiency of a unit is improved, and the problem that the energy efficiency of the unit is lost due to balance of hydraulic power is solved. And compared with a common constant flow system, the unit has variable flow, the water mixing phenomenon is avoided, the problem that the unit stops due to improper adjustment of the differential pressure bypass valve is solved, and the conveying loss is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of heat pump control, and in particular to an air source heat pump control system with energy storage. Background Art

[0002] At present, electricity consumption is unevenly distributed in various places, and power shortages occur from time to time. For this reason, all regions have introduced policies to limit peak electricity consumption. For example, when power is limited, non-livelihood air conditioning electricity consumption is limited first. The peak and peak times of electricity consumption in summer are 16:00-22:00, and the peak and peak times of electricity consumption in winter are: 16:00-21:00. This makes it difficult to meet people's needs for cooling and heating. This seriously restricts the work efficiency of various industries and businesses, and the personnel experience is extremely poor.

[0003] Generally, central air conditioners with office areas of 1,000-20,000 square meters should be designed with air source heat pumps. In the working area of ​​the heat pump, the higher the evaporation temperature, the higher the energy efficiency and heating and cooling capacity; the lower the condensation temperature, the higher the energy efficiency and heating and cooling capacity. However, there will be a problem that performance is opposite to demand. When the weather is hotter, the demand for cooling increases, but the heat pump evaporation temperature is lower and the condensation temperature is higher; when the weather is colder, the demand for heat increases, but the heat pump evaporation temperature is lower and the condensation temperature is higher. This results in both energy consumption and poor results.

[0004] At the same time, in most current air conditioning systems, the energy generated and the energy consumed are not matched. Generally speaking, when the energy generated is less than or equal to the energy consumed, the heating / cooling effect will be poor, and the feedback will be more obvious at this time. However, when the energy generated is greater than the energy consumed, the efficiency of each unit will be reduced, and the feedback will not be obvious, resulting in a large amount of energy waste.

[0005] When the air conditioning system has a large load fluctuation, such as when the terminal is closed more frequently, the unit is adjusted more, the water pump is frequency-converted, etc., it will cause hydraulic imbalance. Therefore, under various state transitions, serious hydraulic imbalance will occur. This problem makes the system unable to operate stably, making it difficult to realize the function of the entire system, and the unit side is frequently started and stopped, and the unit energy efficiency is extremely poor. Summary of the invention

[0006] In order to solve the above-mentioned problems, the present invention provides an air source heat pump control system with energy storage.

[0007] In the first aspect, the present invention provides an air source heat pump control system with energy storage, which adopts the following technical solution:

[0008] An air source heat pump control system with energy storage comprises: an air source heat pump system, an energy storage system, a hydraulic module and a terminal system, wherein the air source heat pump system, the energy storage system, the hydraulic module and the terminal system are connected via a variable flow delivery system, and the air source heat pump system and the energy storage system are connected and perform energy conversion between them.

[0009] Furthermore, the air source heat pump system includes an air source heat pump unit, a self-operated flow regulating valve, a flow meter and a pressure sensor, wherein the self-operated flow regulating valve determines the relationship between flow and opening through five-point calibration to supply flow, and adjusts the target opening in sequence according to the flow meter.

[0010] Furthermore, the self-operated flow regulating valve sequentially adjusts the target opening according to the flow meter, including sequentially adjusting the flow to prevent valve inertia deviation of the self-operated flow regulating valve after the flow meter monitors that the flow exceeds the overshoot: valve execution target opening 1 = last calculated target opening + A1 + 5%; after execution, the valve execution target opening 2 = valve target opening 1 - (A1 + 5%) + 2% until the flow demand is met, wherein the deviation is A1, and the allowable error is 2%.

[0011] Furthermore, the air source heat pump system and the energy storage system are connected and perform energy conversion with each other, including using the air source heat pump to store energy in the energy storage tank during the valley period of electricity consumption during summer cooling, and using the water tank energy storage for cooling during the peak period of electricity consumption; using the air source heat pump to provide dual heating of direct heat source and heat storage during the valley period of electricity consumption during winter heating, and when the peak period of electricity consumption is reached, the air source heat pump stops running and the energy is released by the water storage tank instead; the water storage tank is used to release energy at night.

[0012] Furthermore, the air source heat pump system and the energy storage system are connected and perform energy conversion between each other, and also include real-time adjustment of the energy supply conversion of the energy storage system based on the conversion capacity of the air source heat pump system, wherein the energy conversion capacity of the air source heat pump C = N·A·B, wherein the conversion capacity is C, and the energy generation capacity is The unit energy efficiency is The number of machines is

[0013] Furthermore, the air source heat pump system and the energy storage system are connected and perform energy conversion between each other, and also include real-time adjustment of the energy supply conversion of the energy storage system based on the peak-valley-flat weight coefficient, wherein the weight coefficient matrix D∈(D 深谷 ,D 谷 ,D 平 ,D 峰 ,D 尖峰 ), then the weighted conversion capability matrix F = C·D ―1, then the identity matrix of the activation strategy is solved by comparing each element in the matrix. When F 峰ij >F 谷ij Then the corresponding I in the m×n identity matrix I 峰ij =1; when F 峰ij ≤F 谷ij Then the corresponding I in the m×n identity matrix I 峰ij = 0, find I∈(I 深谷 ,I 谷 ,I 平 ,I 峰 ,I 尖峰 ), then the time-sharing opening strategy H=F·I is calculated to determine whether to open the air source.

[0014] Furthermore, the hydraulic module includes a control valve and a flow meter installed on the transmission network for transmitting the energy of the air source heat pump system and the energy storage system to the terminal system, as well as installed on the main pipeline and the branch pipeline.

[0015] Furthermore, the energy storage system includes a balancing valve, a water pump, a plate heat exchanger, an open insulated water tank, a temperature sensor, a pressure sensor, a flow meter and a liquid level sensor.

[0016] In summary, the present invention has the following beneficial technical effects:

[0017] The system of the present invention generates heat according to the open terminal load, and all the generated energy enters the system, which increases the energy efficiency of the unit and avoids the problem of unit energy efficiency loss due to balanced hydraulics. Compared with the common constant flow system, the unit variable flow avoids the occurrence of water mixing and unit shutdown problems caused by improper adjustment of the pressure difference bypass valve, and saves transmission losses.

[0018] The invention sets the opening weight matrix according to the peak and valley and electricity requirements, and combines the air source conversion matrix to determine the air source heat pump operation strategy and energy storage and release strategy, so that the air source heat pump operates in the high efficiency range. Compared with the traditional peak and valley equal time storage, the heating capacity of the air source heat pump is taken into account, making the energy storage more energy efficient and more energy-saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of an air source heat pump unit according to an embodiment of the present invention.

[0020] Figure 2 Schematic diagram of the structure of the energy storage system according to the embodiment of the present invention.

[0021] Figure 3 It is a schematic diagram of the energy conversion capacity of the air source heat pump according to an embodiment of the present invention. DETAILED DESCRIPTION

[0022] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0023] Example 1

[0024] Reference Figure 1 An air source heat pump control system with energy storage in this embodiment includes: an air source heat pump system, an energy storage system, a hydraulic module and a terminal system, wherein the air source heat pump system, the energy storage system, the hydraulic module and the terminal system are connected through a variable flow delivery system, and the air source heat pump system and the energy storage system are connected and perform energy conversion with each other.

[0025] Specifically,

[0026] For the air source heat pump part on the energy-generating side, the system consists of an air source heat pump unit, a self-operated flow control valve, a flow meter, and a pressure sensor. In response to changes in the number of terminal openings, the number of units and the unit flow are adjusted to match accordingly. The self-operated flow control valve is calibrated at five points, and the corresponding opening is automatically adjusted according to its calculated flow, and the actual flow is detected by the flow sensor of each unit. When the flow exceeds the overshoot (such as the allowable error of 2%, the deviation is A1), in order to prevent valve inertia deviation, the flow is adjusted in the following order: the valve first executes target opening 1 = last calculated target opening + A1 + 5%, the valve is adjusted to opening 1, and then the valve executes target opening 2 = valve target opening 1-(A1+5%) + 2% until the flow demand is met.

[0027] The energy storage module is composed of a self-operated flow control valve, a water pump, a plate heat exchanger, an open insulated water tank, a temperature sensor, a pressure sensor, a flow meter, and a liquid level sensor. The energy storage system uses an open system, which can flexibly adjust the storage capacity according to the liquid level in the water tank. The open system and the closed system are isolated by a plate heat exchanger. Compared with the closed system pressure water tank, it has the advantages of small size, large heat storage capacity, and simple structure.

[0028] The principle of coordination between the energy storage system and the air source heat pump system is: in summer, the daytime temperature is high, the air source heat pump has low cooling efficiency, and the peak and peak times of electricity consumption in summer are 16:00-22:00. At this time, it is not appropriate to turn on the air source heat pump for direct cooling. From 0:00 to 8:00, the temperature is low and the electricity consumption is at the valley and average values. At this time, most of the personnel are no longer working, and the air source heat pump is used to store energy in the energy storage tank. The system has high energy efficiency (low energy consumption and high cooling capacity). When the temperature is high during the day and the electricity consumption is at its peak, energy storage is used for cooling. At this time, the air source heat pump has 0 cooling energy consumption, and the energy consumed by the cycle is much less than the cooling energy consumption of the air source heat pump, thereby achieving the purpose of energy saving and peak load regulation. When heating in winter, the temperature is high during the day and at night, and the energy efficiency and heating capacity of the corresponding air source heat pump are high at night, and the heat storage of the building is also better than at night. Taking Jinan as an example, the valley and deep valley values ​​of electricity consumption in winter are from 10:00 to 15:00 in the morning. At this time, the air source heat pump has the best heating capacity and energy efficiency. The peak and peak values ​​are from 16:00 to 21:00. At this time, the heating capacity and energy efficiency of the air source heat pump are reduced, and the amount of heat required by people increases. At night, when people rest, the amount of heat required is the lowest. Based on this situation, when the heat demand is the lowest during the day and the air source heat pump has the highest energy efficiency, the dual mode of direct heat supply from the air source heat pump and heat storage by the energy storage system is carried out. When the electricity consumption reaches the peak, the air source heat pump stops running and the heat storage tank is used to release energy instead. At night, the air source heat pump is less efficient and the heat storage tank is still used to release energy.

[0029] Energy storage and air source heat pump energy generation require the introduction of the concept of conversion capacity. Let the conversion capacity be C and the energy generation be Hereinafter referred to as A, the unit energy efficiency is Hereinafter referred to as B, the number of machines is, Hereinafter referred to as N, the air source heat pump conversion capacity C = N·A·B, the surface is as follows Figure 3 shown.

[0030] Through this type of algorithm, a standard can be made for the ability of air source heat pumps to convert and apply energy. When the air energy conversion capacity is high, the unit should be turned on for energy storage, direct supply, or both. When the air energy conversion capacity is low, the energy storage equipment should be turned on to release energy as the main cooling or heating source.

[0031] When judging whether the unit or the cold and hot source is turned on, the peak-valley-level weight coefficient should be considered. Make a comprehensive judgment based on the peak-valley-level weight coefficient. For example, set the weight coefficient matrix D∈(D 深谷 ,D 谷 ,D 平 ,D 峰 ,D 尖峰 ), then the weighted conversion capability matrix F = C·D ―1, then the identity matrix of the activation strategy is solved by comparing each element in the matrix, such as F 峰ij >F 谷ij Then the corresponding I in the m×n identity matrix I 峰ij =1, such as F 峰ij ≤F 谷ij Then the corresponding I in the m×n identity matrix I 峰ij = 0, find I∈(I 深谷 ,I 谷 ,I 平 ,I 峰 ,I 尖峰 ), then the time-sharing opening strategy H=F·I is calculated to determine whether to open the air source.

[0032] Assume that the load consumed by each terminal is (hereinafter referred to as K, the variables below are all matrices and will not be expanded), where the elements in the matrix K should conform to Where K0 is the design load, T N0 is the design indoor temperature, T W0 is the design indoor temperature, T N is the target indoor temperature, T N is the target outdoor temperature. Let T N =T N0 As a constant, construct the matrix K of water temperature and air temperature.

[0033] The variable flow transmission system is composed of pipelines, flow regulating valves, variable frequency water pumps, etc. The main system is responsible for transmitting energy from the energy generating end to the terminal system, and the auxiliary system is responsible for connecting the energy storage end with the energy generating end and the terminal system.

[0034] The main system structure is: the air source heat pump system is connected to the hydraulic module, and the hydraulic module system is connected to the variable flow delivery system. The variable flow delivery system performs variable flow control through regulating valves and variable frequency water pumps, and uses flow meters as feedback.

[0035] The structure of the auxiliary system is as follows: the energy storage system is connected to the auxiliary system through a hydraulic module, and the auxiliary system is connected to the main system through a plate heat exchanger. The flow rate is controlled by changing the regulating valve and the variable frequency water pump, and the flow meter is used as feedback.

[0036] The specific operation of the variable flow system is:

[0037] The ideal state of cooling and heating is:

[0038] That is, the balance between energy production and energy consumption, Q ai Provide heat to the heat source, Q bj is the total terminal consumption, Q c For heat loss.

[0039] According to the HVAC professional formula G = 0.86Q / Δt, the most efficient temperature difference of the machine is 5°C, so the system flow is obtained Where G is the mass flow rate, G a Measure flow rate for heat source.

[0040] To prevent the terminal heat dissipation from being insufficient, the terminal heat dissipation is calculated according to the highest design thermal index for the single terminal flow rate. In relation to hydraulic balance, the flow rate should comply with G aij >G bij .

[0041] In this way, the heat consumed by a single end is calculated as a constant value, and the required flow rate G is calculated by the number of end openings. b , through G a >G b The principle of calculating the flow rate required by the unit is used to match the number of machines turned on. The number of machines is then adjusted to match the needs of the end users.

[0042] When the system power supply mode is turned on: H ij =F ij I ij When ≠0, the air source is turned on, but the energy release is not turned on.

[0043] H ij =F ij I ij =0, the energy release is started.

[0044] Summer energy storage: When the system is not turned on, when H ij =F ij I ij ≠0, it enters the energy storage mode.

[0045] Winter energy storage: H ij =F ij I ij ≠0, when m≠0, it enters the heating and energy storage dual mode.

[0046] After determining the operating mode, the variable flow system is adjusted according to the operating mode.

[0047] When the direct supply mode is turned on, when the number of terminals turned on is m, the number of heat sources turned on is N = m·K·A ―1 , calculate the traffic matrix G a =0.172·N·A.

[0048] When the energy release mode is turned on, the flow matrix is ​​G a =0.172·m·K.

[0049] When summer storage mode is turned on, perform the following steps:

[0050] 1. Receive the signal to adjust the mode to cold storage mode.

[0051] 2. Execute the start position signal (the air source heat pump is in the power supply state, and the unit is in normal state after the reset; the heat pump unit is in remote mode; the balance valve is fully opened to 100%. All the cut-off valves are closed, and the regulating valve is opened to 0%)

[0052] 3. All fan coil units are online and in the off state.

[0053] 4. Open the energy storage cut-off valve and balancing valve, and close the energy release cut-off valve and balancing valve.

[0054] 5. Adjust the working mode of the air source heat pump unit to cooling mode.

[0055] 6. Adjust the air source heat pump unit control mode to outlet water temperature control.

[0056] 7. The variable flow system is turned on and operates continuously without any faults.

[0057] Calculate the heat storage target value Q 蓄 =C·M·Δt, where C is the specific heat capacity of water, M is the mass of the liquid in the water tank, and Δt is the difference between the temperature in the water tank and the actual temperature. ij =q 蓄ij / (x-2)a ij Where X is the estimated storage time, a ij is the heating capacity of a single heat pump. Then there is the main system energy storage flow g 蓄1ij =0.172(x-2)a ij , g 蓄2ij PID adjustment is performed according to the outlet water temperature of the plate heat exchanger and changes according to the target water temperature.

[0058] When the winter heating + energy storage dual mode is turned on, perform the following steps:

[0059] 1. Receive the signal to adjust the mode to heating + energy storage dual mode.

[0060] 2. Execute the start position signal (the air source heat pump is in the power supply state, and the unit is in normal state after the reset; the heat pump unit is in remote mode; the balance valve is fully opened to 100%. All the cut-off valves are closed, and the regulating valve is opened to 0%)

[0061] 3. All fan coil units are online.

[0062] 4. Open the energy storage cut-off valve and balancing valve, and close the energy release cut-off valve and balancing valve.

[0063] 5. Adjust the working mode of the air source heat pump unit to heating mode.

[0064] 6. Adjust the air source heat pump unit control mode to outlet water temperature control.

[0065] 7. The variable flow system is turned on and operates continuously without any faults.

[0066] Calculate the heat storage target value and calculate the heat storage target value Q 蓄1 =C·M·Δt, where C is the specific heat capacity of water, M is the mass of the liquid in the water tank, and Δt is the difference between the temperature in the water tank and the actual temperature.

[0067] According to the number of terminal openings m, calculate the terminal heat consumption Q 耗 =m·K, assuming that the total heating capacity is Q 造 =n·A, where n is the total number of air source heat pumps. Then Q2 = Q 造 ―Q 耗 ―Q c , where Q c Uncontrollable, ignore this value, then Q 蓄2 =(x―2)·Q2, at this time, it is necessary to determine the energy storage and energy storage demand.

[0068] Let the judgment matrix S = Q 蓄2 ―Q 蓄1 ,s ij When ≥0, it can operate normally.

[0069] Then calculate the number of units opened n ij =q 蓄1ij / (x-2)a ij +q 耗ij / a ij , where x is the estimated storage time, a ij The heating capacity of a single heat pump. The main system energy storage flow g 蓄1ij =0.172q 蓄1ij / (x―2), subsystem g 蓄2ij The energy storage flow is PID-regulated according to the outlet water temperature of the plate heat exchanger and changes according to the target water temperature. 蓄ij =0.172a ij n ij

[0070] s ij <0, the combined energy storage is meaningless, the energy provided is ineffective, and there is no operating value. It is necessary to lower the energy storage target temperature difference Δt or the water volume M in the water tank to meet the energy storage requirements. If the energy storage requirements cannot be met, no energy storage will be performed.

[0071] As a further embodiment,

[0072] An air source heat pump control system with energy storage in this embodiment, wherein:

[0073] Air source heat pump system: The heat generated by the air source heat pump system during operation can be partially used for hot water production in the domestic hot water system. The heat can be transferred to the hot water production equipment in the domestic hot water system through heat exchange and other means to achieve comprehensive utilization of energy.

[0074] Energy storage system: During the energy storage or release process of the energy storage system, the heat interaction with the domestic hot water system is coordinated according to the actual situation. For example, when the energy storage system is releasing energy and there is excess heat available for domestic hot water production, this part of the heat can be reasonably allocated to the domestic hot water system.

[0075] Hydraulic module: The hydraulic module is responsible for the hydraulic balance regulation of the entire system. The variable flow system delivery pipeline will be connected to the overall hydraulic balance regulated by the hydraulic module to ensure that the medium can be reasonably distributed according to demand during the transportation process, avoiding hydraulic imbalance that affects the stability of energy supply.

[0076] Terminal system: The variable flow system ultimately delivers energy to the terminal system, such as fan coil units, modular air cabinets, radiators, etc., to meet users' energy needs.

[0077] Energy storage systems, such as Figure 2 As shown:

[0078] It includes flow valve, water pump, plate heat exchanger, open insulated water tank, temperature and pressure sensor, flow meter and liquid level sensor. The connection relationship of each device is as follows:

[0079] Water pump: One end is connected to an open insulated water tank and is responsible for pumping water out of the tank or injecting water into the tank to achieve the circulation of water in the energy storage system, thereby cooperating to complete the energy storage and release process.

[0080] Plate heat exchanger: One side is connected to the air source heat pump system, and the other side is connected to the open insulated water tank. The heat conversion between the air source heat pump system and the energy storage system is realized by heat exchange. For example, when cooling in summer, the air source heat pump system transfers the cold energy to the water in the water tank through the plate heat exchanger for cold storage; when heating in winter, the heat is transferred to the water in the water tank for heat storage.

[0081] Flow valve: Installed on the relevant pipeline, the valve opening is adjusted according to the flow data monitored by the flow meter and the control logic of the system to control the flow of water between different components in the energy storage system, ensuring the reasonable distribution and stable operation of water flow during the energy storage and release process. For example, during the energy storage process, according to the liquid level of the water tank (monitored by the liquid level sensor) and the required storage capacity (combined with the monitoring data of the temperature and pressure sensor), the water flow entering the water tank is controlled by adjusting the opening of the energy storage flow regulating valve.

[0082] Temperature and pressure sensors: They are installed in key locations such as open insulated water tanks and related pipelines to monitor water temperature and pressure in real time. These monitoring data are fed back to the system control unit to adjust the energy storage and release operation strategies according to the actual temperature and pressure conditions (such as determining whether the appropriate energy storage temperature and pressure conditions are reached); on the other hand, they can be used to ensure the safe operation of the system and avoid abnormal conditions such as over-temperature and over-pressure.

[0083] Flow meter: installed on the pipeline, it is mainly used to monitor the flow of water in different links of the energy storage system. Its monitoring data provides a basis for adjusting the opening of the energy storage flow regulating valve, ensuring that the water flow in the system flows according to the predetermined flow requirements and realizing precise energy storage and release control.

[0084] Liquid level sensor: Installed in an open insulated water tank, used to monitor the liquid level in the water tank in real time. Its monitoring data is of great reference value for controlling the start and stop of the water pump and the opening adjustment of the energy storage flow regulating valve. For example, when the liquid level in the water tank is low, the water pump can be controlled to fill the water tank, and the filling speed can be controlled by adjusting the opening of the energy storage flow regulating valve; when the liquid level in the water tank reaches a certain height, the operating status of related equipment can be adjusted according to actual needs to achieve reasonable energy storage or energy release operations.

[0085] Hydraulic module:

[0086] The hydraulic module plays a key role in hydraulic balance regulation in the entire system. It includes the following main components and connections:

[0087] Main pipelines and branch pipelines: constitute the hydraulic transmission network of the entire system, transporting the media (hot water, cold water, etc.) generated or processed by the air source heat pump system, energy storage system, etc. to the terminal system.

[0088] Hydraulic regulating valve: installed at key positions of the main pipeline and branch pipeline, the valve opening is adjusted according to the hydraulic demand of the system and the operating status of each part to balance the hydraulic pressure difference between different areas and different equipment, ensuring that water can flow stably and evenly in the system. For example, when the water consumption in some areas of the terminal system changes (such as the opening or closing of some terminal equipment), the hydraulic regulating valve can adjust the opening in time according to the monitored hydraulic changes to keep the hydraulic state of the entire system balanced and avoid problems such as excessive or low local water pressure, unstable water flow, etc. caused by hydraulic imbalance.

[0089] Pressure sensors: Distributed in different locations of the main pipeline and branch pipelines, they monitor the water pressure in the pipelines in real time. The monitoring data is fed back to the control unit of the system so that the control unit can accurately determine the hydraulic state of the system according to the pressure changes, and control the opening adjustment of the hydraulic regulating valve accordingly, so as to achieve precise control of the hydraulic balance of the system.

[0090] Flow meter: Also installed on the pipeline, used to monitor the flow of water in the pipeline. Combined with the data of the pressure sensor, it can provide a more comprehensive understanding of the hydraulic characteristics of the system, provide a basis for the accurate regulation of the hydraulic module, ensure that the flow and pressure of water in the system can meet the operating requirements of each part, and maintain the stable operation of the system.

[0091] Terminal system:

[0092] The terminal system is the part that directly connects with user needs, mainly including various terminal devices and the pipelines connected to them. Its connection relationship with other systems is as follows:

[0093] With the air source heat pump system: connected through pipes, the air source heat pump system adjusts its own operating status (such as heating capacity, flow rate, etc.) according to the load demand of the terminal system (such as cooling or heating demand), and transports the processed cold source or heat source to the terminal equipment in the terminal system through pipes to meet the user's demand for regulating the indoor ambient temperature.

[0094] With the energy storage system: When the energy storage system is needed for cooling or heating, the terminal system is connected to the energy storage system through pipelines to receive the cold or heat released by the energy storage system, thus achieving energy-saving and stable cooling and heating services. For example, during the peak electricity consumption period in summer, when the air source heat pump system stops running, the terminal system can obtain cold energy from the energy storage system for cooling; during the peak electricity consumption period in winter, heat can be obtained from the energy storage system for heating.

[0095] The terminal equipment includes:

[0096] Air conditioning terminal: such as fan coil units, air conditioning units, etc., used to achieve cooling or heating regulation of indoor air. Its operating status is adjusted according to the indoor temperature demand and the supply of cold and heat sources from the air source heat pump system or energy storage system.

[0097] The above are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An air source heat pump control system with energy storage, characterized in that: include: An air source heat pump system, an energy storage system, a hydraulic module, a variable flow delivery system and a terminal system, wherein the air source heat pump system, the energy storage system, the hydraulic module and the terminal system are connected via a variable flow delivery system, and the air source heat pump system and the energy storage system are connected and perform energy conversion with each other.

2. The air source heat pump control system with energy storage according to claim 1, characterized in that: The air source heat pump system includes an air source heat pump unit, a self-operated flow regulating valve, a flow meter and a pressure sensor, wherein the self-operated flow regulating valve determines the relationship between flow and opening through five-point calibration to supply flow, and adjusts the target opening according to the flow meter sequence.

3. The air source heat pump control system with energy storage according to claim 2, characterized in that: The self-operated flow regulating valve sequentially adjusts the target opening according to the flow meter, including sequentially adjusting the flow to prevent valve inertia deviation of the self-operated flow regulating valve after the flow meter monitors that the flow exceeds the overshoot: valve execution target opening 1 = last calculated target opening + A1 + 5%, after execution, valve execution target opening 2 = valve target opening 1-(A1+5%)+2%, until the flow demand is met, wherein the deviation is A1, and the allowable error is 2%.

4. The air source heat pump control system with energy storage according to claim 3, characterized in that: The air source heat pump system and the energy storage system are connected and perform energy conversion with each other, including using the air source heat pump to store energy in the energy storage tank at night for cooling in the summer, and using the water tank stored energy for cooling during the day; using the air source heat pump for direct heat supply and heat storage during the day for heating in the winter. When the electricity consumption reaches the peak, the air source heat pump stops running and the water storage tank releases energy instead; the water storage tank is used to release energy at night.

5. The air source heat pump control system with energy storage according to claim 4, characterized in that: The air source heat pump system and the energy storage system are connected and perform energy conversion between each other, and also include real-time adjustment of the energy supply conversion of the energy storage system based on the conversion capacity of the air source heat pump system, wherein the air source heat pump conversion capacity C = N·A·B, wherein the conversion capacity is C, and the energy generation is The unit energy efficiency is The number of machines is 6. The air source heat pump control system with energy storage according to claim 5, characterized in that: The air source heat pump system and the energy storage system are connected and perform heat conversion between each other, and also include real-time adjustment of the energy supply conversion of the energy storage system based on the peak-valley-flat weight coefficient, wherein the weight coefficient matrix D∈(D 深谷 ,D 谷 ,D 平 ,D 峰 ,D 尖峰 ), then the weighted conversion capability matrix F = C·D ―1 , then the identity matrix of the activation strategy is solved by comparing each element in the matrix. When f 峰ij >f 谷ij Then the corresponding i in the m×n identity matrix I 峰ij =1; when f 峰ij ≤f 谷ij Then the corresponding i in the m×n identity matrix I 峰ij = 0, find I∈(I 深谷 ,I 谷 ,I 平 ,I 峰 ,I 尖峰 ), then the time-sharing opening strategy H=F·I is calculated to determine whether to open the air source.

7. The air source heat pump control system with energy storage according to claim 6, characterized in that: The hydraulic module includes a flow regulating valve and a flow meter installed between the variable flow delivery system and the air source heat pump, which is used to deliver the energy generated by the air source heat pump system and the energy storage system to the terminal system, as well as installed on the main pipeline and the branch pipeline.

8. The air source heat pump control system with energy storage according to claim 7, characterized in that: The energy storage system comprises a regulating valve, a water pump, a plate heat exchanger, an open thermal insulation water tank, a temperature sensor, a pressure sensor, a flow meter and a liquid level sensor.

9. The air source heat pump control system with energy storage according to claim 1, characterized in that: The variable flow rate delivery system comprises a pipeline, a water pump, a frequency converter and a valve group.

Images