Heat pump assembly energy efficiency analysis method and air source heat pump with assembly energy efficiency analysis function

Abstract

The invention relates to a heat pump assembly energy efficiency analysis method and an air source heat pump with assembly energy efficiency analysis, and the method comprises the steps: calculating the power consumption of each power consumption assembly according to the operation characteristics of each power consumption assembly in combination with real-time working condition parameters; energy efficiency parameters of all the power consumption assemblies are calculated through the output heat, and the energy efficiency of all the power consumption assemblies is evaluated. According to the analysis method, under the condition that existing hardware of a heat pump system is utilized and an external electricity meter is not needed, the precision of the calculated power consumption and energy efficiency parameters of all the power consumption assemblies of the heat pump is high and accords with the actual situation; the optimal parameter combination of each power consumption component under high efficiency can be obtained by evaluating the power consumption and energy efficiency parameters of each power consumption component, an adjustment basis is provided for equipment operation optimization, the energy efficiency of the heat pump is further improved, and the method can be widely applied to the application scene of heat pump power consumption statistics.

Description

Technical Field

[0001] The present invention relates to the field of heat pump control, and in particular to a heat pump component energy efficiency analysis method and an air source heat pump with component energy efficiency analysis. Background Art

[0002] A heat pump is a device that transfers heat from a low-temperature environment to a high-temperature environment through electrical drive. It is widely used in heating, cooling, and hot water supply. Due to its efficient energy utilization, heat pumps are considered to be a green and environmentally friendly solution to replace traditional heating equipment. However, the actual power consumption of a heat pump is related to many factors, which directly affect its operating cost and energy efficiency. With the continuous improvement of users' demand for energy saving, accurately calculating the power consumption of heat pumps and making full and reasonable use of the energy efficiency of each component have become important means to evaluate the performance of heat pumps, optimize operating efficiency, and reduce operating costs.

[0003] Existing methods for calculating the power consumption of heat pumps mainly use estimation method, dynamic monitoring calculation method and external meter measurement method.

[0004] The estimation method is based on a simple empirical formula. For example, the power consumption is directly estimated by inputting the rated power and operating time of the equipment. This method ignores the dynamic working conditions in actual operation, such as flow changes affecting the power of the water pump, load fluctuations affecting the power of the load, etc. The calculation results are often inaccurate and cannot reflect the changes in the actual operating conditions. The calculation results have large deviations. Another example is estimating the power consumption by a single parameter, such as the compressor power. This method makes it difficult to fully consider other important factors, such as the contribution of fans, water pumps, electric heaters and other loads to the overall power consumption. The model is too simple and cannot adapt to complex system conditions.

[0005] The dynamic monitoring calculation method adopts an offline statistical mode, and calculates the power consumption by manually reading the meter data or regularly counting the operating parameters. This method cannot realize real-time power consumption monitoring, and it is difficult to optimize the system operation status in real time. The monitoring accuracy is low when the system changes frequently.

[0006] The external meter measurement method requires an external meter to be installed outside the component, which is costly and requires separate installation. The installation is troublesome, and the data cannot be directly transmitted to the heat pump, so the heat pump cannot directly obtain the power consumption. Summary of the invention

[0007] Based on this, an object of the present invention is to provide a method for analyzing energy efficiency of a heat pump component.

[0008] A heat pump component energy efficiency analysis method, comprising:

[0009] S1: Obtain the cumulative operating time of each power-consuming component within a set time period;

[0010] S2: Calculate the power consumption Q of each power-consuming component based on its characteristics and cumulative operating time i , the power consumption of each power-consuming component is Q i satisfy:

[0011]

[0012] Where: P i is the power of the ith power-consuming component detected in real time; t i is the cumulative operating time of the i-th power-consuming component, t1 and t2 are time intervals;

[0013] S3: Get the output heat Q within the set time period out , calculate the energy efficiency parameter COP of each power-consuming component i ;

[0014] S4: The energy efficiency parameter COP of each power-consuming component i Compared with the preset energy efficiency parameters COP of each power-consuming component i target Compare and determine whether each power-consuming component is operating efficiently:

[0015] If COP i >COP i target +k i , then the i-th power-consuming component operates efficiently;

[0016] If COP i ∈[COP i target -k i ,COP i target +k i ], the i-th power-consuming component operates normally;

[0017] If COP i <COP i target -k i , then the i-th power-consuming component operates inefficiently;

[0018] Among them, k i is the allowed fluctuation value of the preset energy efficiency parameter of the i-th power consuming component.

[0019] Compared with the prior art, the heat pump component energy efficiency analysis method of the present invention makes full use of the characteristics of each power-consuming component, calculates the power consumption of each power-consuming component according to the operating characteristics of each power-consuming component and combines the real-time operating parameters; calculates the energy efficiency parameters of each power-consuming component by outputting heat, and evaluates the energy efficiency of each power-consuming component. This analysis method can calculate the power consumption and energy efficiency parameters of each power-consuming component of the heat pump with high accuracy and in line with the actual situation, while using the existing hardware of the heat pump system and without the need for an external electric meter; by evaluating the power consumption and energy efficiency parameters of each power-consuming component, the optimal parameter combination of each power-consuming component under high efficiency can be obtained, providing an adjustment basis for optimizing equipment operation, further improving the energy efficiency of the heat pump, and can be widely used in application scenarios for heat pump power consumption statistics.

[0020] Further, the power-consuming components include a compressor, a fan, and a water pump;

[0021] The power consumption of the compressor and fan is Q 压-风 satisfy:

[0022]

[0023] Among them, P 压-风 =U 输入 ×I 输入

[0024] Where: P 压-风 is the power of the compressor and fan, U 输入 I is the input voltage of the compressor drive board detected in real time; 输入 is the input current of the compressor drive board detected in real time; t 压-风 is the cumulative running time of the compressor and the fan; t1 and t2 are time intervals;

[0025] The power consumption of the water pump is Q 水泵 satisfy:

[0026]

[0027] in,

[0028] Where: P 水泵 is the actual power of the pump, P 水泵-额定 is the rated power of the water pump, V is the actual speed of the water pump motor, V 额定 is the rated speed of the water pump motor, t 水泵 Cumulative running time of the pump.

[0029] Furthermore, the method further includes using the change in water pump efficiency to correct the actual power of the water pump, and the corrected power P of the water pump is 水 ' 泵 satisfy:

[0030]

[0031] in,

[0032] Where: η 泵 is the efficiency of the pump at the actual flow rate, η 额定 is the efficiency of the pump at rated flow, γ is the efficiency reduction coefficient, which indicates the efficiency attenuation rate when it deviates from the rated flow, f 泵 is the actual flow rate of the pump, f 额 is the rated flow rate of the pump.

[0033] Furthermore, the power-consuming components also include an electric heater, a crankshaft heating belt, and an antifreeze heating belt;

[0034] The power consumption Q of the electric heater 电热 satisfy:

[0035]

[0036] in,

[0037] Where: R 电热 is the resistance of the electric heater, t 电热 Accumulate the running time of the electric heater;

[0038] The power consumption Q of the crankshaft heating belt 曲轴 satisfy:

[0039]

[0040] in,

[0041] Where: R 曲轴 is the resistance of the crankshaft heating belt, t 曲轴 Cumulative running time of crankshaft heating belt;

[0042] The power consumption of the antifreeze heating belt is Q 防冻 satisfy:

[0043]

[0044] in,

[0045] Where: R 防冻 is the resistance of the antifreeze heating belt, t 防冻 The accumulated operating time of the antifreeze heating belt.

[0046] Furthermore, the power-consuming component also includes a four-way valve, an electronic expansion valve and a water supply valve;

[0047] The four-way valve and power consumption Q 四通 satisfy:

[0048]

[0049] Among them, P 四通 =P 四通-额定

[0050] Where: P 四通-额定 is the rated power of the four-way valve, t 四通 The accumulated running time of the four-way valve;

[0051] The power consumption of the electronic expansion valve is Q 膨胀 satisfy:

[0052]

[0053] Among them, P 膨胀 =P 膨胀-额定

[0054] Where: P 膨胀-额定 is the rated power of the electronic expansion valve, t 膨胀 The accumulated running time of the electronic expansion valve;

[0055] The power consumption of the water supply valve is Q 补水 satisfy:

[0056]

[0057] Among them, P 补水 =P 补水-额定

[0058] Where: P 补水-额定 is the rated power of the water supply valve, t 补水 The accumulated running time of the water supply valve.

[0059] Furthermore, the power-consuming component also includes a main control module;

[0060] The power consumption of the main control module circuit board is Q 主控 satisfy:

[0061]

[0062] Where: P 主控 is the power of the main control module circuit board, t 主控 The accumulated running time of the main control module circuit board.

[0063] Furthermore, the method further comprises step S5:

[0064] S5: Get the actual electricity consumption Q of the air source heat pump within the set time period 表, calculate the total power consumption Q of each power-consuming component during this time period total , calculate the total power consumption Q total The actual power Q 表 The error r is determined to determine whether the error r is less than or equal to the set error threshold r. target :

[0065] If the error r is less than or equal to the set error threshold r target , then the energy efficiency comparison result of step S4 is credible, and the corresponding operating parameters of each power-consuming component are stored;

[0066] If the error r is greater than the set error threshold r target , then the energy efficiency comparison result of step S4 is unreliable, and each power-consuming component is adjusted according to the stored operating parameters of each power-consuming component.

[0067] Furthermore, the total power consumption of each power-consuming component Q total satisfy:

[0068]

[0069] The error r satisfies:

[0070] r=|Q 表 -Q total | / Q 表 *100%

[0071] Where: Q i is the power consumption of each power-consuming component.

[0072] Furthermore, it also includes introducing the mode factor K M Total power consumption Q total Make corrections to correct the total power consumption Q′ total satisfy:

[0073]

[0074] Then the error r satisfies:

[0075] r=|Q 表 -Q′ total | / Q 表 *100%.

[0076] At the same time, the present invention provides an air source heat pump with component energy efficiency analysis, including a compressor, a four-way valve, a water side heat exchanger, an electronic expansion valve, an air side heat exchanger connected through a refrigerant circulation pipeline, and a crankshaft heating belt arranged on the crankcase of the compressor, and a water replenishment valve and a water pump arranged at the water inlet end of the water side heat exchanger, an electric heater in the water tank at the water outlet end, and a fan arranged on one side of the air side heat exchanger, and an antifreeze heating belt arranged on the refrigerant circulation pipeline, and a main control module electrically and / or communicatively connected to each power-consuming component, and the main control module analyzes the energy efficiency of each power-consuming component of the air source heat pump according to any of the above-mentioned heat pump component energy efficiency analysis methods.

[0077] Compared with the prior art, the beneficial effects of the air source heat pump of the present invention are the same as any of the above-mentioned heat pump component energy efficiency analysis methods, which will not be repeated here.

[0078] For better understanding and implementation, the present invention is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0079] Figure 1 This is a schematic diagram of wiring of various power-consuming components on a main control module according to an embodiment of the present invention;

[0080] Figure 2 It is a schematic diagram of a process of one embodiment of the present invention. DETAILED DESCRIPTION

[0081] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention.

[0082] In order to solve the problem that the existing technology calculates power consumption and energy efficiency based on empirical formulas or regular operating parameters without an electricity meter, the calculation results have large deviations and cannot monitor power consumption and energy efficiency in real time, the present invention has been studied and designed to propose an air source heat pump with component energy efficiency analysis. The air source heat pump includes a heat pump component energy efficiency analysis method, which calculates the power consumption of each power-consuming component according to the operating characteristics of each power-consuming component and combines the real-time operating parameters; and calculates the energy efficiency parameters of each power-consuming component by outputting heat, and evaluates the energy efficiency of each power-consuming component. The analysis method can calculate the power consumption and energy efficiency parameters of each power-consuming component of the heat pump with high accuracy and in line with the actual situation while using the existing hardware of the heat pump system and without the need for an external electricity meter; by evaluating the power consumption and energy efficiency parameters of each power-consuming component, the optimal parameter combination of each power-consuming component under high efficiency can be obtained, providing an adjustment basis for equipment operation optimization, further improving the energy efficiency of the heat pump, and can be widely used in application scenarios of heat pump power consumption statistics.

[0083] In a specific implementation, the air source heat pump proposed in the present invention includes a compressor, a four-way valve, a water-side heat exchanger, an electronic expansion valve, an air-side heat exchanger connected through a refrigerant circulation pipeline, and a crankshaft heating belt arranged on the crankcase of the compressor, and a water supply valve and a water pump arranged at the water inlet end of the water-side heat exchanger, an electric heater in the water tank at the water outlet end, and a fan arranged on one side of the air-side heat exchanger, and an antifreeze heating belt arranged on the refrigerant circulation pipeline, and a sensor module installed on each power-consuming component, and a main control module 10 electrically and / or communicatively connected to each power-consuming component. Among them, the main power-consuming components of the air source heat pump include: a main control module 10, a compressor and a fan, a water pump, an electric heater, a crankshaft heating belt, an antifreeze heating belt, a four-way valve, an electronic expansion valve and a water supply valve. Please refer to Figure 1 The compressor terminal 11, the fan terminal 12, the water pump terminal 13, the electric heater terminal 14, the crankshaft heating belt terminal 15, the antifreeze heating belt terminal 16, the four-way valve terminal 17, the electronic expansion valve terminal 18 and the water supply valve terminal 19 are all connected to the relay of the main control module 10.

[0084] The main control module includes a storage unit and a processing unit. The storage unit is used to obtain the relevant parameters, real-time operating parameters and accumulated operating time of each power-consuming component; and the calculation data of each power-consuming component. The processing unit is used to calculate the power consumption and energy efficiency parameters according to the relevant parameters, real-time operating parameters and accumulated operating time of each power-consuming component, and to judge whether it is efficient or not with the energy efficiency parameters set.

[0085] See also Figure 2 The main control module performs energy efficiency analysis of the heat pump assembly in the following manner. Specifically, the following steps are included.

[0086] S1: Obtain the cumulative operating time of each power-consuming component within a set time period.

[0087] The power-consuming components include: main control module, compressor and fan, water pump, electric heater, crankshaft heating belt, antifreeze heating belt, four-way valve, electronic expansion valve and water supply valve. Correspondingly, the cumulative running time of the main control module is t 主控 , the cumulative running time of the compressor and fan is t 压-风 , the cumulative running time of the pump is t 水泵 , the cumulative running time of the electric heater is t 电热 , the cumulative running time of the crankshaft heating belt is t 曲轴 , the cumulative running time of the antifreeze heating belt is t 防冻 , the cumulative running time of the four-way valve is t 四通 , the cumulative operation time of the electronic expansion valve is t 膨胀 The cumulative running time of the water supply valve is t 补水 .

[0088] The set time period is set according to the operating status of the air source heat pump, such as 1 day, 2 days, 3 days, etc.

[0089] In some implementations, the accumulated operating time of each power-consuming component is calculated by controlling the on and off conditions of each power-consuming component in the system.

[0090] Example 1: Setting the electric heater start condition to the ambient temperature T in the air source heat pump control system 环 <0℃, when the ambient temperature sensor in the air source heat pump detects the ambient temperature T 环 When the temperature is <0℃, the control logic of the control system will control the electric heater to turn on, and the main control module will start to accumulate the running time of the electric heater according to the control logic of the control system.

[0091] In some implementations, the accumulated operating time of each power-consuming component is calculated by counting the changes in the values ​​of sensors disposed on each power-consuming component.

[0092] Example 2: A flow meter is set at the water outlet of the air source heat pump. When the water pump is started, the flow meter will detect an increase in flow rate, and when the water pump is turned off, the flow meter will detect a decrease or stop in flow rate. By monitoring whether the changes in the flow meter readings meet the set flow change thresholds for starting and shutting down the water pump, the start and shut down time of the water pump can be determined, and the main control module uses this to count the cumulative running time of the water pump.

[0093] Example 3: A temperature sensor is set on the electric heater of the air source heat pump. When the electric heater is started, the temperature sensor will detect the temperature increase and the rate of temperature increase; when the electric heater is turned off, the temperature sensor will detect the temperature decrease and the rate of temperature decrease; by monitoring whether the changes in the temperature sensor meet the set temperature change thresholds for starting and shutting down the electric heating, the start and shut down time of the electric heater can be determined, and the main control module uses this to count the cumulative running time of the electric heater.

[0094] In some embodiments, the accumulated running time of each power-consuming component is comprehensively counted by controlling the on and off conditions of each power-consuming component in the control system and the value transformation of the sensor set on each power-consuming component. The power-consuming component with a sensor can preferentially use the data of the configured sensor to count the accumulated running time, and the power-consuming component without a sensor uses the on and off conditions of the corresponding control logic in the control system to count the accumulated running time.

[0095] S2: Calculate the power consumption Q of each power-consuming component based on its characteristics and cumulative operating time i , the power consumption of each power-consuming component is Q i satisfy:

[0096]

[0097] Where: P i is the power of the ith power-consuming component detected in real time, in watts; t i is the cumulative operating time of the i-th power-consuming component, t1 and t2 are time intervals in seconds (s) or hours (h).

[0098] Specifically, the power consumption of each power-consuming component is calculated as follows.

[0099] (1) Compressor and fan

[0100] Since the compressor and fan are powered by the compressor driver board, the voltage and current sampling circuit data of the driver board can be directly used, so the power P of the compressor and fan 压-风 and power consumption Q 压-风 satisfy:

[0101] P 压-风 =U 输入 ×I 输入

[0102]

[0103] Where: U 输入 I is the input voltage of the compressor drive board detected in real time; 输入 is the input current of the compressor drive board detected in real time; t 压-风 is the cumulative running time of the compressor and the fan; t1 and t2 are time intervals in seconds (s) or hours (h).

[0104] (2) Electric heater, crankshaft heating belt and antifreeze heating belt

[0105] The heating load of the air source heat pump is connected in parallel with the driver board, so the heating load voltage is consistent with the driver board input voltage.

[0106] Power of electric heater P 电热 and power consumption Q 电热 satisfy:

[0107]

[0108] Where: R 电热 is the resistance of the electric heater.

[0109] Power P of crankshaft heating belt 曲轴 and power consumption Q 曲轴 satisfy:

[0110]

[0111] Where: R曲轴 is the resistance of the electric heater.

[0112] Power P of antifreeze heating belt 防冻 and power consumption Q 防冻 satisfy:

[0113]

[0114] Where: R 防冻 is the resistance of the electric heater.

[0115] In some embodiments, in order to ensure the accuracy and stability of the input voltage used when calculating the power consumption of the compressor, fan, electric heater, crankshaft heating belt and antifreeze heating belt, the main control module also includes processing of abnormal input voltage. The specific processing method is as follows:

[0116] Continuously obtain the input voltage U of the power grid 输入 :

[0117] If the input voltage U 输入 Greater than the set high voltage threshold U UP , triggering an abnormal flag, skipping the current cycle's power storage and use, and avoiding the accumulation of erroneous power data;

[0118] If the input voltage U 输入 Less than the set low voltage threshold U DOWN , triggering the power-off flag and immediately saving the power data to avoid the loss of accumulated power data.

[0119] (3) Water pump

[0120] The power of the water pump will change due to the flow rate, so the power of the water pump is not equal to the rated power. From the water pump experimental data and power curve, it can be seen that the motor shaft power and the speed are in a cubic relationship:

[0121]

[0122] Where: P 水泵 is the actual power of the pump, P 水泵-额定 is the rated power of the water pump, V is the actual speed of the water pump motor, V 额定 is the rated speed of the water pump motor.

[0123] Therefore, the pump power P 水泵 and power consumption Q 水泵 satisfy:

[0124]

[0125] In some implementations, in order to obtain accurate water pump power, the water pump power is corrected using changes in water pump efficiency.

[0126]

[0127] Where: η 泵 is the efficiency of the pump at the actual flow rate, η 额定 is the efficiency of the pump at rated flow, γ is the efficiency reduction coefficient, which indicates the efficiency attenuation rate when it deviates from the rated flow, f 泵 is the actual flow rate of the pump, f 额 is the rated flow rate of the pump.

[0128] Therefore, the corrected pump power P 水 ' 泵 and corrected power consumption Q′ 水泵 satisfy:

[0129]

[0130] (4) Four-way valve, electronic expansion valve and water supply valve

[0131] The power of general four-way valves, electronic expansion valves and water supply valves is relatively small, usually around 5W, and the power fluctuation of the valve is not large, so the power during operation is approximately equal to the rated power.

[0132] Power P of four-way valve 四通 and power consumption Q 四通 satisfy:

[0133] P 四通 =P 四通-额定

[0134]

[0135] Power P of electronic expansion valve 膨胀 and power consumption Q 膨胀 satisfy:

[0136] P 膨胀 =P 膨胀-额定

[0137]

[0138] Power of water supply valve P 补水 and power consumption Q 补水 satisfy:

[0139] P 补水 =P 补水-额定

[0140]

[0141] (5) Main control module

[0142] Power consumption of main control module circuit board Q 主控 satisfy:

[0143]

[0144] Where P 主控 Determined according to the main control circuit chip used in the air source heat pump.

[0145] S3: Get the output heat Q within the set time period out , calculate the energy efficiency parameter COP of each power-consuming component i .

[0146] COP of each power-consuming component i satisfy:

[0147]

[0148] Where: Q out Q is the heat output of the air source heat pump within the set time period. i is the power consumption of the i-th power-consuming component in the set time period.

[0149] S4: The energy efficiency parameter COP of each power-consuming component i Compared with the preset energy efficiency parameters COP of each power-consuming component i target Compare and determine whether each power-consuming component is operating efficiently:

[0150] If COP i >COP i target +k i , then the i-th power-consuming component operates efficiently;

[0151] If COP i ∈[COP i target -k i ,COP i target +k i ], the i-th power-consuming component operates normally;

[0152] If COP i <COP i target -k i , then the i-th power-consuming component operates inefficiently;

[0153] Among them, k i is the allowed fluctuation value of the preset energy efficiency parameter of the i-th power consuming component.

[0154] Example 4: The target heating temperature of the air source heat pump is 45°C, the compressor operating frequency is 60Hz, and the water pump speed is 500 rpm. The COP is calculated using the water pump power consumption model method. 水泵 >COP i target +k 水泵 At this time, the water pump is in high-efficiency operation, and the speed of the water pump is recorded at the target heating temperature and the operating frequency of the compressor as the trend analysis data of the water pump operation, providing an adjustment basis for subsequent water pumps in low-efficiency operation, thereby making the air source heat pump energy-saving and efficient.

[0155] In some embodiments, the main control module also includes an evaluation of energy efficiency analysis.

[0156] S5: Get the actual electricity consumption Q of the air source heat pump within the set time period 表 , calculate the total power consumption Q of each power-consuming component during this time period total , calculate the total power consumption Q total The actual power Q 表 The error r is determined to determine whether the error r is less than or equal to the set error threshold r. target :

[0157] If the error r is less than or equal to the set error threshold r target , then the energy efficiency comparison result of step S4 is credible, and the corresponding operating parameters of each power-consuming component are stored;

[0158] If the error r is greater than the set error threshold r target , then the energy efficiency comparison result of step S4 is unreliable, and each power-consuming component is adjusted according to the stored operating parameters of each power-consuming component.

[0159] The total power consumption of each power-consuming component Q total satisfy:

[0160]

[0161] The error r satisfies:

[0162] r=|Q 表 -Q total | / Q 表 *100%.

[0163] The error threshold r target Determined based on experiments or based on stored historical data.

[0164] In some implementations, since the operating conditions of the loads in standby mode and non-standby mode are different, in order to obtain a more accurate total power consumption Q total , introduce the mode factor K M Total power consumption Qtotal Make corrections to the total power consumption Q t ' otal satisfy:

[0165]

[0166] Among them, the mode factor K M Characterize the correction system of air source heat pump in different working modes, for example, in standby mode, K M =0.91; in heating mode, K M =1.

[0167] Then the error r satisfies:

[0168] r=|Q 表 -Q′ total | / Q 表 *100%.

[0169] Application Examples

[0170] The following are the operating data and calculation evaluation results of a 10KWh air source heat pump running for 3 days.

[0171] Table 1 Operation data and calculation evaluation results of compressor and fan

[0172]

[0173] Table 2 Operating data and calculation evaluation results of rated 300W DC water pump

[0174] time Day 1 Day 2 Day 3 Running status Pump speed 800 Pump speed 650 Pump speed 200 Input Power 142.8kWh 107.1kWh 125kWh Run time 24 24 power consumption 3.42kWh 2.57kWh 2.57kWh COP energy efficiency parameters 70 93.3 80 Energy saving status Inefficient operation Efficient operation Normal operation

[0175] Table 3 Operation data and calculation evaluation results of electric heater

[0176] time Day 1 Day 2 Day 3 Running status 500W operation for 2 hours 500W operation for 2 hours 500W operation for 2 hours Input Power 500W 500W 500W Run time 2 hours 2 hours 2 hours power consumption 1kWh 1kWh 1kWh COP energy efficiency parameters 20 20 20 Energy saving status Normal operation Normal operation Normal operation

[0177] Table 4 Operation data and calculation evaluation results of antifreeze heating belt

[0178]

[0179]

[0180] Table 5 Operation data and calculation evaluation results of crankshaft heating belt

[0181] time Day 1 Day 2 Day 3 Running status 40W operation for 1 hour 40W operation for 1 hour 40W operation for 1 hour Input Power 40W 40W 40W Run time 1 hour 1 hour 1 hour power consumption 0.04kWh 0.04kWh 0.04kWh COP energy efficiency parameters 250 250 250 Energy saving status Normal operation Normal operation Normal operation

[0182] Table 6 Operation data and calculation evaluation results of water supply valve, electronic expansion valve and four-way valve

[0183] time Day 1 Day 2 Day 3 Input Power 5W 5W 5W Run time 1 hour 1 hour 1 hour power consumption 0.005kWh 0.12kWh 0.12kWh COP energy efficiency parameters 2000 2000 2000 Energy saving status Normal operation Normal operation Normal operation

[0184] Table 7 Operation data and calculation evaluation results of the main control module

[0185] time Day 1 Day 2 Day 3 Running status 24 hours operation 24 hours operation 24 hours operation power consumption 0.045kWh 0.045kWh 0.045kWh COP energy efficiency parameters 2500 2500 2500 Energy saving status Normal operation Normal operation Normal operation

[0186] Table 8 Power error from the 1st to the 3rd day

[0187] Summary Calculate total power consumption Actual power meter error Day 1 79.61kWh 81.25kWh 2.03％ Day 2 61.72kWh 63.15kWh 2.26％ Day 3 72.26kWh 74.18kWh 2.59％

[0188] From Tables 1 to 7, we can clearly understand the power consumption of each power-consuming component of the air source heat pump, and know the impact of the air source heat pump on energy efficiency under different conditions. From Tables 1 to 7, we can see that the compressor, fan and water pump have a greater impact on the energy efficiency of the heat pump. From Table 1, we can see that when the compressor frequency is 600HZ, the wind speed is 550 rpm, and the water pump speed is 650, it is relatively energy-efficient, which provides great help for the energy efficiency control of the air source heat pump.

[0189] It can be seen from Table 8 that the power consumption calculated by the characteristics of each power-consuming component and the accumulated operating time of the present invention has a small error with the actual power consumption of the electric meter, and the calculation result is credible.

[0190] Compared with the prior art, the present invention proposes a more accurate, efficient and dynamic method for calculating the power consumption of each power-consuming component of an air source heat pump, which can achieve statistics on the power consumption of each power-consuming component of the heat pump without the need for an electric meter to accurately measure the power consumption of each power-consuming component of the air source heat pump, and evaluate the energy efficiency COP value of each power-consuming component in combination with actual operating conditions. This can not only help users understand the power consumption and energy efficiency of each power-consuming component of the air source heat pump, but also provide optimized operation suggestions based on the energy efficiency evaluation results of each power-consuming component, thereby improving the energy efficiency level. It is suitable for the vast majority of heat pumps on the market and provides help for heat pumps to achieve energy saving.

[0191] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the embodiments of the present application. The singular forms of "a", "said" and "the" used in the embodiments of the present application and the claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that, unless otherwise specified, "multiple" and "several" refer to two or more; "and / or" refers to and includes any or all possible combinations of one or more associated listed items; "first", "second", "third", etc. are only used to distinguish, rather than to describe a specific order or sequence, and cannot be understood as indicating or implying relative importance. When the above description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. In the description of the present application, for those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0192] The above-mentioned embodiments only express several implementation methods of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, and the present invention is also intended to include these modifications and modifications.

Claims

1. A method for analyzing the energy efficiency of a heat pump component, characterized in that: include: S1: Obtain the cumulative operating time of each power-consuming component within a set time period; S2: Calculate the power consumption Q of each power-consuming component based on its characteristics and cumulative operating time i , the power consumption of each power-consuming component is Q i satisfy: Where: P i is the power of the ith power-consuming component detected in real time; t i is the cumulative operating time of the i-th power-consuming component, t1 and t2 are time intervals; S3: Get the output heat Q within the set time period out , calculate the energy efficiency parameter COP of each power-consuming component i ; S4: The energy efficiency parameter COP of each power-consuming component i Compared with the preset energy efficiency parameters COP of each power-consuming component i target Compare and determine whether each power-consuming component is operating efficiently: If COP i >COP i target +k i , then the i-th power-consuming component operates efficiently; If COP i ∈[COP i target -k i ,COP i target +k i ], the i-th power-consuming component operates normally; If COP i <COP i target -k i , then the i-th power-consuming component operates inefficiently; Among them, k i is the allowed fluctuation value of the preset energy efficiency parameter of the i-th power consuming component.

2. The heat pump component energy efficiency analysis method according to claim 1, characterized in that: The power-consuming components include compressors, fans, and water pumps; The power consumption of the compressor and fan is Q 压-风 satisfy: Among them, P 压-风 =U 输入 ×I 输入 Where: P 压-风 is the power of the compressor and fan, U 输入 I is the input voltage of the compressor drive board detected in real time; 输入 is the input current of the compressor drive board detected in real time; t 压-风 is the cumulative running time of the compressor and the fan; t1 and t2 are time intervals; The power consumption of the water pump is Q 水泵 satisfy: in, Where: P 水泵 is the actual power of the pump, P 水泵-额定 is the rated power of the water pump, V is the actual speed of the water pump motor, V 额定 is the rated speed of the water pump motor, t 水泵 Cumulative running time of the pump.

3. The heat pump component energy efficiency analysis method according to claim 2, characterized in that: It also includes using the change in pump efficiency to correct the actual power of the pump. The corrected power of the pump P 水 ' 泵 satisfy: in, Where: η 泵 is the efficiency of the pump at the actual flow rate, η 额定 is the efficiency of the pump at rated flow, γ is the efficiency reduction coefficient, which indicates the efficiency attenuation rate when it deviates from the rated flow, f 泵 is the actual flow rate of the pump, f 额 is the rated flow rate of the pump.

4. The heat pump component energy efficiency analysis method according to claim 2 or 3, characterized in that: The power-consuming components also include an electric heater, a crankshaft heating belt, and an antifreeze heating belt; The power consumption Q of the electric heater 电热 satisfy: in, Where: R 电热 is the resistance of the electric heater, t 电热 Accumulate the running time of the electric heater; The power consumption Q of the crankshaft heating belt 曲轴 satisfy: in, Where: R 曲轴 is the resistance of the crankshaft heating belt, t 曲轴 Cumulative running time of crankshaft heating belt; The power consumption of the antifreeze heating belt is Q 防冻 satisfy: in, Where: R 防冻 is the resistance of the antifreeze heating belt, t 防冻 The accumulated operating time of the antifreeze heating belt.

5. The heat pump component energy efficiency analysis method according to claim 4, characterized in that: The power-consuming components also include a four-way valve, an electronic expansion valve and a water supply valve; The four-way valve and power consumption Q 四通 satisfy: Among them, P 四通 =P 四通-额定 Where: P 四通-额定 is the rated power of the four-way valve, t 四通 The accumulated running time of the four-way valve; The power consumption of the electronic expansion valve is Q 膨胀 satisfy: Among them, P 膨胀 =P 膨胀-额定 Where: P 膨胀-额定 is the rated power of the electronic expansion valve, t 膨胀 The accumulated running time of the electronic expansion valve; The power consumption of the water supply valve is Q 补水 satisfy: Among them, P 补水 =P 补水-额定 Where: P 补水-额定 is the rated power of the water supply valve, t 补水 The accumulated running time of the water supply valve.

6. The heat pump component energy efficiency analysis method according to claim 5, characterized in that: The power-consuming component also includes a main control module; The power consumption of the main control module circuit board is Q 主控 satisfy: Where: P 主控 is the power of the main control module circuit board, t 主控 The accumulated running time of the main control module circuit board.

7. The heat pump component energy efficiency analysis method according to any one of claims 1, 2, 3, 5, and 6, characterized in that: The step S5 is also included: S5: Get the actual electricity consumption Q of the air source heat pump within the set time period 表 , calculate the total power consumption Q of each power-consuming component during this time period total , calculate the total power consumption Q total The actual power Q 表 The error r is determined to determine whether the error r is less than or equal to the set error threshold r. target : If the error r is less than or equal to the set error threshold r target , then the energy efficiency comparison result of step S4 is credible, and the corresponding operating parameters of each power-consuming component are stored; If the error r is greater than the set error threshold r target , then the energy efficiency comparison result of step S4 is unreliable, and each power-consuming component is adjusted according to the stored operating parameters of each power-consuming component.

8. The heat pump component energy efficiency analysis method according to claim 7, characterized in that: The total power consumption of each power-consuming component Q total satisfy: The error r satisfies: r=|Q 表 -Q total | / Q 表 *100% Where: Q i is the power consumption of each power-consuming component.

9. The heat pump component energy efficiency analysis method according to claim 8, characterized in that: It also includes the introduction of the mode factor K M Total power consumption Q total Make corrections to the total power consumption Q t ' otal satisfy: Then the error r satisfies: r=|Q 表 -Q t ′ otal | / Q 表 *100%。 10. An air source heat pump with component energy efficiency analysis, characterized in that: It includes a compressor, a four-way valve, a water-side heat exchanger, an electronic expansion valve, an air-side heat exchanger connected through a refrigerant circulation pipeline, and a crankshaft heating belt arranged on the crankcase of the compressor, a water replenishment valve and a water pump arranged at the water inlet end of the water-side heat exchanger, an electric heater in the water tank at the water outlet end, a fan arranged on one side of the air-side heat exchanger, an antifreeze heating belt arranged on the refrigerant circulation pipeline, and a main control module electrically and / or communicatively connected to each power-consuming component, wherein the main control module analyzes the energy efficiency of each power-consuming component of the air source heat pump according to the heat pump component energy efficiency analysis method according to any one of claims 1-9.

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