Control method and device of heat pump compressor and air source heat pump

Abstract

The invention discloses a control method and device for a heat pump compressor and an air source heat pump. The control method comprises the following steps that S1, a heat pump unit is started to operate, and a controller collects operation parameters of the heat pump unit; s2, the compressor is automatically operated and adjusted according to PID; s3, when the first environment temperature interval is met, high-pressure prediction correction is conducted in real time, and compressor frequency limiting and lowering control is conducted; s4, when the second environment temperature interval is met, compressor load correction and heating capacity frequency control parameter correction are carried out; s5, when the third environment temperature interval is met, compressor load correction and heating capacity frequency control parameter correction are carried out; the heat pump parameters are comprehensively analyzed through the system parameters, the system pressure range and the heat pump heating capacity condition are estimated, and the running state of the compressor is regulated and controlled in time.

Description

[Technical field]

[0001] The present invention relates to an air source heat pump control technology, and in particular to a control method and device for a heat pump compressor and an air source heat pump. [Background technology]

[0002] The air source heat pump compresses the low-pressure refrigerant into high-pressure gas through a compressor, which then enters the condenser for liquefaction and transfers the absorbed heat to the circulating water through a heat exchanger, thereby raising the water temperature and providing a continuous heat source for indoor heating until the indoor temperature reaches the set temperature.

[0003] In order to improve the efficiency of heat pumps, most of the existing air source heat pumps are designed and manufactured with components that match the system. However, the existing heat pump units usually operate under different loads. Once the load changes, the actual operating conditions will also change accordingly. The actual efficiency of the unit will be very different from the rated operating conditions of the design. Therefore, the heat pump usually adjusts the output load through the variable frequency compressor or the intermittent start and stop of the compressor's working cylinder during operation, but these methods have a great impact on the operating efficiency and system stability. At the same time, due to the existence of disturbances, measurement noise, and uncertainty, there is also a certain interference to the controller, making it difficult for the existing control mode to achieve good control quality.

[0004] Therefore, existing heat pump systems are usually equipped with pressure sensors to detect system pressure, and when the system pressure is high, the compressor frequency is reduced in time to unload and avoid excessive operating pressure of the compressor. However, when the sensor terminal is loose or the body fails, and the pressure protection component is not configured for cost control, it will inevitably have an uncontrollable impact on the operating efficiency and stability of the system. In severe cases, when the air source heat pump is operated in certain specific occasions, the operating pressure of the heat pump system is too high due to reasons such as excessive refrigerant filling in the unit, high frequency operation of the compressor, and high operating water temperature of the heat pump, which will cause the compressor protection or damage; affect the reliability of the compressor operation, resulting in a bad heating experience for users. [Summary of the invention]

[0005] The present invention provides a control method and device for a heat pump compressor and an air source heat pump. When the air source heat pump cannot collect the pressure of the heat pump system, the heat pump parameters are comprehensively analyzed through system parameters, and the system pressure range and the heating capacity of the heat pump are estimated, so as to timely adjust the operating state of the compressor, take into account the heating capacity of the heat pump and the high-reliability operation of the system, improve the operating reliability of the compressor, and ensure the reliability of user use.

[0006] The technical solution adopted by the present invention to solve its technical problem is:

[0007] A control method for a heat pump compressor, the heat pump system comprises a first heat exchanger arranged outdoors, a second heat exchanger using a water pump unit for water cooling and heat exchange, a compressor, a third heat exchanger for replenishing air to the compressor, a first electronic expansion valve arranged between the first heat exchanger and the third heat exchanger, and a second electronic expansion valve arranged between the third heat exchanger and the second heat exchanger, the compressor is connected between the first heat exchanger and the second heat exchanger through a refrigerant pipeline and a four-way valve; the control method for the heat pump compressor comprises the following steps:

[0008] Step S1: start the heat pump unit

[0009] The heat pump unit starts to operate after starting the heating or hot water mode, and the controller collects the operating parameters of the heat pump unit;

[0010] The parameters collected by the controller include the operating environment temperature T of the heat pump h , Heat exchanger inlet water temperature T in , heat exchanger outlet water temperature T ou , Heat exchanger refrigerant liquid pipe temperature T ly and compressor operating current value P c , the heat exchanger inlet water temperature T in , the heat exchanger outlet water temperature T ou and the refrigerant liquid pipe temperature T of the heat exchanger ly are the operating parameters corresponding to the second heat exchanger;

[0011] Step S2: The compressor automatically operates and adjusts according to PID

[0012] After the heat pump unit starts running for a period of time, the controller starts to comprehensively judge the changes in the compressor frequency control temperature value Tk, the compressor frequency control current value Pc and the refrigerant liquid pipe temperature. According to the following judgment and detection, the compressor operates according to the following conditions;

[0013] Step S2.1, when T k <T m , or P c <P m , or T ly -T in ≥H y And dT ly / dt<G m When the compressor is running, the frequency of the compressor will automatically increase or decrease according to the fuzzy control parameters, and will not be affected by the correction of the heating capacity of the heat pump unit;

[0014] Step S2.2, when T m ≤T k <T x , or P m ≤P c <Px , or T ly -T in ≥H y And G m ≤dT ly / dt<G x The compressor is controlled by deceleration and frequency increase. The compressor can increase the frequency by M frequency at most each time. The operation time is T x After a certain time, the heat pump unit is tested again as a deceleration and frequency increase condition, and the compressor frequency is increased to M frequency at most each time;

[0015] Step S2.3, when T x ≤T k <T j , or P x ≤P c <P j , or T ly -T in ≥H y And G x ≤dT ly / dt<G j When the compressor is running, the frequency rise is limited to maintain the compressor frequency;

[0016] Step S2.4, when T j ≤T k <T t , or P j ≤P c <P t , or T ly -T in ≥H y And G j ≤dT ly / dt<G t When the compressor frequency is reduced to N, the compressor frequency is reduced to N. After Ty time, the test is repeated. If T k If the frequency control temperature value still meets the conditions of this interval, the frequency reduction conditions of the heat pump unit will be tested again;

[0017] Step S2.5, when T k ≥T t , or P c ≥P t , or T ly -T in ≥H y And dT ly / dt≥G t When the compressor stops running directly;

[0018] Where: T k =T ou , T kIndicates the frequency control temperature value of the compressor frequency collected in real time; when the high-pressure sensor is not configured, the outlet water temperature T of the second heat exchanger is collected ou As an approximate substitute value for high-pressure temperature frequency control; or the outlet water temperature T of the second heat exchanger ou Using equivalent solution T ly Instead, use an equivalent solution T ly When replacing, the corresponding parameter values ​​need to be reassigned;

[0019] in:

[0020] M indicates that the compressor is subject to high pressure temperature and the frequency rises slowly. m Frequency of influence and limitation;

[0021] Tx indicates that the compressor is subject to high pressure temperature and the frequency rises slowly. m Frequency operation time limited by impact;

[0022] N represents the compressor frequency reduction value T due to high pressure temperature j The frequency of the reduction due to the influence;

[0023] Ty represents the compressor frequency reduction value T due to high pressure temperature j The frequency running time is reduced due to the impact;

[0024] T m It indicates the budgeted high-pressure temperature slow frequency rise value corrected according to the capacity of the heat pump unit;

[0025] T x It indicates the budgeted high-pressure temperature limit frequency rise value corrected according to the capacity of the heat pump unit;

[0026] T j It indicates the budgeted high-pressure temperature frequency reduction value after correction according to the capacity of the heat pump unit;

[0027] T t It indicates the budgeted high pressure temperature compressor stop value corrected according to the heat pump unit capacity;

[0028] H y Indicates the preset value of the refrigerant liquid pipe temperature participating in the compressor frequency control;

[0029] dT ly / dt represents the rate of change of the refrigerant liquid pipe temperature collected by the controller;

[0030] G m Indicates the preset value of the refrigerant liquid pipe temperature change rate to control the compressor to slowly increase the frequency;

[0031] G x Indicates the preset value of the refrigerant liquid pipe temperature change rate to control the compressor frequency limit;

[0032] Gj Indicates the preset value of the refrigerant liquid pipe temperature change rate to control the compressor frequency reduction;

[0033] G t Indicates the preset value for the refrigerant liquid pipe temperature change rate to control the compressor to stop;

[0034] P m Indicates the preset value of the compressor current controlling the slow frequency increase of the compressor;

[0035] P x Indicates the preset value of the compressor current control compressor limit frequency rise;

[0036] P j Indicates the preset value of compressor current control compressor frequency reduction;

[0037] P t Indicates the preset value of the compressor current to control the compressor to stop;

[0038] Step S3: When the first ambient temperature range is met, that is, when T h >T h1 hour:

[0039] Step S3.1, when the heat pump unit heats the water with a temperature difference T ou -T in >Change water temperature correction value T n When the pressure is too high, correction is required; high pressure prediction correction is performed in real time, and compressor frequency reduction control is performed;

[0040] Calculate T m =T m0 +Ti,

[0041] Calculate T x =T x0 +Ti,

[0042] Calculate T j =T j0 +Ti,

[0043] Calculate T t =T t0 +Ti;

[0044] Step S3.2, when T ou -T in ≤T n When , there is no need to increase the correction value. At this time, the heat pump system has sufficient high-pressure margin, and the heat pump unit can run freely to provide sufficient heating;

[0045] Calculate T m =T m0 ,

[0046] Calculate T x=T x0 ,

[0047] Calculate T j =T j0 ,

[0048] Calculate T t =T t0 ;

[0049] Where: Calculate T n =T in ×K 1 +K 2 ,------Formula 1

[0050] T n represents the variable water temperature reference frequency control correction value calculated according to the proposed calculation formula 1, which is associated with the water temperature;

[0051] K 1 Indicates the water temperature correction factor of the heat pump's heating capacity;

[0052] K 2 Indicates the base value of the water temperature correction coefficient of the heat pump's heating capacity;

[0053] By inlet water temperature T in Determine the basic correction value; the higher the water temperature, the lower the correction base value, and it is easier to meet the correction conditions; the lower the water temperature, the higher the correction base value, and it is more difficult to meet the correction conditions. If the water temperature is too low, no correction is required;

[0054] Where: Calculate Ti = [S × (T ou -T in ) 2 +A×T n 2 +B×(T ou -T in )+C×T n +D×(T ou -T in )×T n +T 0 】------Formula 2

[0055] Ti represents the frequency control correction value related to the heating capacity of the heat pump calculated according to the simulated formula 2, which is associated with the operating capacity of the heat pump;

[0056] S represents the frequency control correction coefficient;

[0057] A represents the frequency control correction coefficient;

[0058] B represents the frequency control correction coefficient;

[0059] C represents the frequency control correction coefficient;

[0060] D represents the frequency control correction coefficient;

[0061] The water flow through the second heat exchanger, the temperature difference between the outlet and inlet water of the second heat exchanger (T ou -T in ) to approximately calculate the heating capacity of the heat pump unit; when the ambient temperature and water temperature are constant and the water flow rate is fixed, the heating capacity of the heat pump unit is mainly determined by (T ou -T in ) is determined; the frequency control temperature value is further corrected by formula 2; and when the compressor frequency is limited or reduced, the heating capacity of the heat pump unit can meet the user's use needs as much as possible, avoiding the situation where the heat pump unit is insufficient due to premature frequency reduction;

[0062] T m0 Indicates the preset value of the high pressure temperature slowly increasing in frequency;

[0063] T x0 Indicates the preset value of high-voltage temperature limit frequency increase;

[0064] T j0 Indicates the preset value of high-voltage temperature frequency reduction;

[0065] T t0 Indicates the preset value of high pressure temperature to stop the compressor;

[0066] Step S4: When the second ambient temperature range is met, that is, T h2 <T h ≤T h1 hour:

[0067] Step S4.1, when the heat pump heat exchange water temperature difference T ou -T in >Change water temperature correction value T n When the compressor load correction and heating capacity frequency control correction parameters are required;

[0068] Calculate T m =T m1 +Ti+K 3 T h ,

[0069] Calculate T x =T x1 +Ti+K 3 T h ,

[0070] Calculate T j =T j1 +Ti+K 3 T h ,

[0071] Calculate T t =Tt1 +Ti+K 3 T h ;

[0072] Step S4.2, when T ou -T in ≤T n When , only the compressor load correction parameters need to be performed;

[0073] Calculate T m =T m1 +K 3 T h ,

[0074] Calculate T x =T x1 +K 3 T h ,

[0075] Calculate T j =T j1 +K 3 T h ,

[0076] Calculate T t =T t1 +K 3 T h ;

[0077] in:

[0078] T m1 Indicates the preset value of the high pressure temperature slowly increasing in frequency;

[0079] T x1 Indicates the preset value of high-voltage temperature limit frequency increase;

[0080] T j1 Indicates the preset value of high-voltage temperature frequency reduction;

[0081] T t1 Indicates the preset value of high pressure temperature to stop the compressor;

[0082] T h1 Indicates the preset value of ambient temperature;

[0083] T h2 Indicates the preset value of ambient temperature;

[0084] K 3 Indicates the compressor load correction factor;

[0085] Step S5: When the third ambient temperature range is met, that is, when T h ≤T h2 hour:

[0086] Step S5.1, when the heat pump heat exchange water temperature difference Tou -T in >Change water temperature correction value T n When the compressor load correction and heating capacity frequency control correction parameters are required;

[0087] Calculate T m =T m2 +Ti+K 4 T h ,

[0088] Calculate T x =T x2 +Ti+K 4 T h ,

[0089] Calculate T j =T j2 +Ti+K 4 T h ,

[0090] Calculate T t =T t2 +Ti+K 4 T h ;

[0091] Step S5.2, when T ou -T in ≤T n When , only the compressor load correction parameters need to be performed;

[0092] Calculate T m =T m2 +K 4 T h ,

[0093] Calculate T x =T x2 +K 4 T h ,

[0094] Calculate T j =T j2 +K 4 T h ,

[0095] Calculate T t =T t2 +K 4 T h ;

[0096] in:

[0097] T m2 Indicates the preset value of the high pressure temperature slowly increasing in frequency;

[0098] T x2Indicates the preset value of high-voltage temperature limit frequency increase;

[0099] T j2 Indicates the preset value of high-voltage temperature frequency reduction;

[0100] T t2 Indicates the preset value of high pressure temperature to stop the compressor;

[0101] In the step S3, the step S4 and the step S5, respectively, T k , or P c , or dT ly / dt is used to control the operation of the compressor.

[0102] Furthermore, the step S2 also includes:

[0103] M indicates that the compressor is subject to high pressure temperature and the frequency rises slowly. m The frequency affected and limited is preferably 2HZ;

[0104] Tx indicates that the compressor is subject to high pressure temperature and the frequency rises slowly. m The frequency operation time limited by the impact is preferably 30s;

[0105] N represents the compressor frequency reduction value T due to high pressure temperature j The frequency reduced by the influence is preferably 5HZ;

[0106] Ty represents the compressor frequency reduction value T due to high pressure temperature j The frequency operation time reduced due to the impact is preferably 15s;

[0107] H y Indicates the preset value of the refrigerant liquid pipe temperature participating in the compressor frequency control, H y The preset value range is 1~20℃, H y The preset default value is 7℃;

[0108] dT ly / dt represents the temperature change rate of the refrigerant liquid pipe collected by the controller, preferably collected once every 10 seconds;

[0109] G m Indicates the preset value of the refrigerant liquid pipe temperature change rate to control the compressor to slowly increase the frequency, G m The preset value range is 0.01~5℃ / s, G m The default value is 0.05℃ / s;

[0110] G x Indicates the preset value of the refrigerant liquid pipe temperature change rate to control the compressor frequency limit, G x The preset value range is 0.01~5℃ / s, G xThe preset default value is 0.1℃ / s;

[0111] G j Indicates the preset value of the refrigerant liquid pipe temperature change rate to control the compressor frequency reduction, G j The preset value range is 0.01~5℃ / s, G j The preset default value is 0.15℃ / s;

[0112] G t Indicates the preset value of the refrigerant liquid pipe temperature change rate to control the compressor to stop, G t The preset value range is 0.01~5℃ / s, G t The preset default value is 0.25℃ / s;

[0113] P m Indicates the preset value of compressor current control compressor slow frequency increase, P m The preset value range is 1~80A, P m The preset default value is 20A;

[0114] P x Indicates the preset value of compressor current control compressor frequency limit, P x The preset value range is 1~80A, P x The preset default value is 21A;

[0115] P j Indicates the preset value of compressor current control compressor frequency reduction, P j The preset value range is 1~80A, P j The default value is 23A.

[0116] P t Indicates the preset value of compressor current to control compressor stop, P t The preset value range is 1~80A, P t The default value is 30A.

[0117] Furthermore, the step S3 also includes:

[0118] K 1 Indicates the water temperature correction factor of the heat pump heating capacity, K 1 The optimal value is -0.2;

[0119] K 2 Indicates the base value of the water temperature correction coefficient of the heat pump heating capacity, K 2 The optimal value is 15.2;

[0120] S represents the frequency control correction coefficient, and the optimal value of S is -0.25;

[0121] A represents the frequency control correction coefficient, and the optimal value of A is 0.09;

[0122] B represents the frequency control correction coefficient, and the optimal value of B is 0.75;

[0123] C represents the frequency control correction coefficient, and the optimal value of C is -0.95;

[0124] D represents the frequency control correction coefficient, and the optimal value of D is 0.2;

[0125] T m0 Indicates the high pressure temperature slowly increases the preset value, T m0 The preset value range is 30~100℃, T m0 The preset default value is 58℃;

[0126] T x0 Indicates the high voltage temperature limit frequency rise preset value, T x0 The preset value range is 30~100℃, T x0 The default value is 60℃ by default;

[0127] T j0 Indicates the high pressure temperature frequency reduction preset value, T j0 The preset value range is 30~100℃, T j0 The preset default value is 62℃;

[0128] T t0 Indicates the preset value of high pressure temperature to stop the compressor, T t0 The preset value range is 30~100℃, T t0 The default setting is 64°C.

[0129] Furthermore, the step S4 also includes:

[0130] T m1 Indicates the high pressure temperature slowly increases the preset value, T m1 The preset value range is 30~100℃, T m1 The preset default value is 63℃;

[0131] T x1 Indicates the high voltage temperature limit frequency rise preset value, T x1 The preset value range is 30~100℃, T x1 The default value is 65℃ by default;

[0132] T j1 Indicates the high pressure temperature frequency reduction preset value, T j1 The preset value range is 30~100℃, T j1 The preset default value is 67℃;

[0133] Tt1 Indicates the preset value of high pressure temperature to stop the compressor, T t1 The preset value range is 30~100℃, T t1 The preset default value is 69℃;

[0134] T h1 Indicates the preset value of ambient temperature, T h1 The preset value range is -40~55℃, T h1 The preset default value is -10℃;

[0135] T h2 Indicates the preset value of ambient temperature, T h2 The preset value range is -40~55℃, T h2 The preset default value is -20℃;

[0136] K 3 Indicates the compressor load correction factor, the optimal value is 0.5;

[0137] Furthermore, the step S5 also includes:

[0138] T m2 Indicates the high pressure temperature slowly increases the preset value, T m2 The preset value range is 30~100℃, T m2 The preset default value is 67℃;

[0139] T x2 Indicates the high voltage temperature limit frequency rise preset value, T x2 The preset value range is 30~100℃, T x2 The preset default value is 69℃;

[0140] T j2 Indicates the high pressure temperature frequency reduction preset value, T j2 The preset value range is 30~100℃, T j2 The preset default value is 71°C;

[0141] T t2 Indicates the preset value of high pressure temperature to stop the compressor, T t2 The preset value range is 30~100℃, T t2 The preset default value is 73°C.

[0142] A control device for a heat pump system, comprising:

[0143] Memory; and

[0144] A processor coupled to the memory is configured to execute any one of the above-mentioned methods for controlling a heat pump compressor based on instructions stored in the memory.

[0145] An air source heat pump, comprising:

[0146] A heat pump system; and a control device for a heat pump system according to the above.

[0147] A computer-readable storage medium comprises computer program instructions, wherein the computer program instructions, when executed by a processor, implement any one of the above-mentioned methods for controlling a heat pump compressor.

[0148] The beneficial effects of the present invention are:

[0149] When the air source heat pump is unable to collect the heat pump system pressure, the heat pump parameters are comprehensively analyzed through the system parameters, and the system pressure range and the heat pump heating capacity are estimated. That is, the heat pump heating capacity is estimated through comprehensive analysis of the heat pump parameters, and the compressor operating status is adjusted in time, taking into account the heat pump heating capacity and the high-reliability operation of the system, thereby improving the operating reliability of the compressor and ensuring user use.

[0150] When the heat pump is heating or hot water is running, the system inlet and outlet water temperatures, compressor operating current value, and refrigerant liquid pipe temperature changes are detected in real time to comprehensively analyze whether the system pressure is too high. At the same time, the heating capacity of the heat pump unit is comprehensively analyzed to achieve multi-parameter control of the compressor speed. It can not only ensure that the heat pump unit has sufficient heating capacity to meet user needs, but also timely adjust the compressor frequency when the pressure is too high to avoid compressor failure, improve the usability and reliability of the heat pump product; thereby enhancing its ability to resist disturbances and uncertainties, allowing the control system to better adapt to on-site requirements and improve water supply quality and system efficiency.

Brief Description of the Drawings

[0151] Figure 1 It is a schematic diagram of the working principle of the heat pump system of the present invention;

[0152] Figure 2 It is a flow chart of the control method of the heat pump compressor in the present invention. [Specific implementation method]

[0153] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0154] The performance of low-temperature air source heat pumps is greatly affected by the ambient temperature, especially in places with very low ambient temperature in winter. When heating higher water temperatures (such as above 60°C), the efficiency of low-temperature air source heat pumps is low. In related technologies, a compression system including a two-stage electronic expansion valve can be used to improve the efficiency of low-temperature air source heat pumps.

[0155] Figure 1 It is a schematic diagram of the structure of a heat pump system according to some embodiments disclosed in the present invention.

[0156] like Figure 1 As shown, the heat pump system includes a first heat exchanger 1 arranged outdoors, a second heat exchanger 2 using a water pump unit for water cooling and heat exchange, a compressor 3, a third heat exchanger 4 for replenishing air to the compressor 3, a first electronic expansion valve 5 arranged between the first heat exchanger 1 and the third heat exchanger 4, and a second electronic expansion valve 6 arranged between the third heat exchanger 4 and the second heat exchanger 2. The compressor 3 is connected between the first heat exchanger 1 and the second heat exchanger 2 through a refrigerant pipeline and a four-way valve 7. In addition, Figure 1 In the figure, port C of the four-way valve 7 is connected to the second heat exchanger 2, port D is connected to the air outlet of the compressor 3, port E is connected to the air supply port of the compressor 3 via the first heat exchanger 1 and the third heat exchanger 4, and port S is connected to the air inlet of the compressor 3.

[0157] The present invention discloses a control method for a heat pump compressor provided by some embodiments, such as Figure 2 As shown, the specific implementation method includes the following steps:

[0158] Step S1: start the heat pump unit

[0159] The heat pump unit starts to operate after starting the heating or hot water mode, and the controller collects the operating parameters of the heat pump unit;

[0160] The parameters collected by the controller include the operating environment temperature T of the heat pump h , Heat exchanger inlet water temperature T in , heat exchanger outlet water temperature T ou , Heat exchanger refrigerant liquid pipe temperature T ly and compressor operating current value P c , the heat exchanger inlet water temperature T in , the heat exchanger outlet water temperature T ou and the refrigerant liquid pipe temperature T of the heat exchanger ly are the operating parameters corresponding to the second heat exchanger;

[0161] Step S2: The compressor automatically operates and adjusts according to PID

[0162] After the heat pump unit starts running for a period of time, the controller starts to comprehensively judge the changes in the compressor frequency control temperature value Tk, the compressor frequency control current value Pc and the refrigerant liquid pipe temperature. According to the following judgment and detection, the compressor operates according to the following conditions;

[0163] Step S2.1, when T k <T m , or P c <P m , or T ly -T in ≥H y And dT ly / dt<G m When the compressor is running, the frequency of the compressor will automatically increase or decrease according to the fuzzy control parameters, and will not be affected by the correction of the heating capacity of the heat pump unit;

[0164] Step S2.2, when T m ≤T k <T x , or P m ≤P c <P x , or T ly -T in ≥H y And G m ≤dT ly / dt<G x The compressor is controlled by deceleration and frequency increase. The compressor can increase the frequency by M frequency at most each time. The operation time is T x After a certain time, the heat pump unit is tested again as a deceleration and frequency increase condition, and the compressor frequency is increased to M frequency at most each time;

[0165] Step S2.3, when T x ≤T k <T j , or P x ≤P c <P j , or T ly -T in ≥H y And G x ≤dT ly / dt<G j When the compressor is running, the frequency rise is limited to maintain the compressor frequency;

[0166] Step S2.4, when T j ≤T k <T t , or P j ≤P c <P t , or T ly -T in ≥H yAnd G j ≤dT ly / dt<G t When the compressor frequency is reduced to N, the compressor frequency is reduced to N. After Ty time, the test is repeated. If T k If the frequency control temperature value still meets the conditions of this interval, the frequency reduction conditions of the heat pump unit will be tested again;

[0167] Step S2.5, when T k ≥T t , or P c ≥P t , or T ly -T in ≥H y And dT ly / dt≥G t When the compressor stops running directly;

[0168] Where: T k =T ou , T k Indicates the frequency control temperature value of the compressor frequency collected in real time; when the high-pressure sensor is not configured, the outlet water temperature T of the second heat exchanger is collected ou As an approximate substitute for high-pressure temperature frequency control, this rule is obtained by summarizing experimental data. Or the outlet water temperature T ou Using equivalent solution T ly Instead, use an equivalent solution T ly The corresponding parameter value needs to be reassigned when replacing; however, there is a certain error between the approximate value and the saturation temperature value corresponding to the actual high pressure, so it can be corrected using the following calculation formula;

[0169] in:

[0170] M indicates that the compressor is subject to high pressure temperature and the frequency rises slowly. m The frequency affected and limited is preferably 2HZ;

[0171] Tx indicates that the compressor is subject to high pressure temperature and the frequency rises slowly. m The frequency operation time limited by the impact is preferably 30s;

[0172] N represents the compressor frequency reduction value T due to high pressure temperature j The frequency reduced by the influence is preferably 5HZ;

[0173] Ty represents the compressor frequency reduction value T due to high pressure temperature j The frequency operation time reduced due to the impact is preferably 15s;

[0174] T m It indicates the budgeted high-pressure temperature slow frequency rise value corrected according to the capacity of the heat pump unit;

[0175] T x It indicates the budgeted high-pressure temperature limit frequency rise value corrected according to the capacity of the heat pump unit;

[0176] T j It indicates the budgeted high-pressure temperature frequency reduction value after correction according to the capacity of the heat pump unit;

[0177] T t It indicates the budgeted high pressure temperature compressor stop value corrected according to the heat pump unit capacity;

[0178] H y Indicates the preset value of the refrigerant liquid pipe temperature participating in the compressor frequency control, H y The preset value range is 1~20℃, H y The preset default value is 7℃;

[0179] dT ly / dt represents the temperature change rate of the refrigerant liquid pipe collected by the controller, preferably collected once every 10 seconds;

[0180] G m Indicates the preset value of the refrigerant liquid pipe temperature change rate to control the compressor to slowly increase the frequency, G m The preset value range is 0.01~5℃ / s, G m The default value is 0.05℃ / s;

[0181] G x Indicates the preset value of the refrigerant liquid pipe temperature change rate to control the compressor frequency limit, G x The preset value range is 0.01~5℃ / s, G x The preset default value is 0.1℃ / s;

[0182] G j Indicates the preset value of the refrigerant liquid pipe temperature change rate to control the compressor frequency reduction, G j The preset value range is 0.01~5℃ / s, G j The preset default value is 0.15℃ / s;

[0183] G t Indicates the preset value of the refrigerant liquid pipe temperature change rate to control the compressor to stop, G t The preset value range is 0.01~5℃ / s, G t The preset default value is 0.25℃ / s;

[0184] P m Indicates the preset value of compressor current control compressor slow frequency increase, P m The preset value range is 1~80A, P m The preset default value is 20A;

[0185] P x Indicates the preset value of compressor current control compressor frequency limit, P x The preset value range is 1~80A, P x The preset default value is 21A;

[0186] P j Indicates the preset value of compressor current control compressor frequency reduction, P j The preset value range is 1~80A, P j The default value is 23A.

[0187] P t Indicates the preset value of compressor current to control compressor stop, P t The preset value range is 1~80A, P t The default value is 30A.

[0188] Step S3: When the first ambient temperature range is met, that is, when T h >T h1 hour:

[0189] Step S3.1, when the heat pump unit heats the water with a temperature difference T ou -T in >Change water temperature correction value T n When the pressure is too high, correction is required; high pressure prediction correction is performed in real time, and compressor frequency reduction control is performed;

[0190] Calculate T m =T m0 +Ti,

[0191] Calculate T x =T x0 +Ti,

[0192] Calculate T j =T j0 +Ti,

[0193] Calculate T t =T t0 +Ti;

[0194] Step S3.2, when T ou -T in ≤T n When , there is no need to increase the correction value. At this time, the heat pump system has sufficient high-pressure margin, and the heat pump unit can run freely to provide sufficient heating;

[0195] Calculate T m =T m0 ,

[0196] Calculate T x =T x0 ,

[0197] Calculate T j =T j0 ,

[0198] Calculate T t =T t0 ;

[0199] Where: Calculate T n =T in ×K 1 +K 2 ,------Formula 1

[0200] T n It indicates the variable water temperature reference frequency control correction value calculated according to the proposed formula 1, which is associated with the water temperature;

[0201] K 1 Indicates the water temperature correction factor of the heat pump heating capacity, K 1 The optimal value is -0.2;

[0202] K 2 Indicates the base value of the water temperature correction coefficient of the heat pump heating capacity, K 2 The optimal value is 15.2;

[0203] In formula 1, the inlet water temperature T in Determine the basic correction value; the higher the water temperature, the lower the correction base value, and it is easier to meet the correction conditions; the lower the water temperature, the higher the correction base value, and it is more difficult to meet the correction conditions. If the water temperature is too low, no correction is required;

[0204] Where: Calculate Ti = [S × (T ou -T in ) 2 +A×T n 2 +B×(T ou -T in )+C×T n +D×(T ou -T in )×T n +T 0 】------Formula 2

[0205] Ti represents the frequency control correction value related to the heating capacity of the heat pump calculated according to the simulated formula 2, which is associated with the operating capacity of the heat pump;

[0206] S represents the frequency control correction coefficient, and the optimal value of S is -0.25;

[0207] A represents the frequency control correction coefficient, and the optimal value of A is 0.09;

[0208] B represents the frequency control correction coefficient, and the optimal value of B is 0.75;

[0209] C represents the frequency control correction coefficient, and the optimal value of C is -0.95;

[0210] D represents the frequency control correction coefficient, and the optimal value of D is 0.2;

[0211] In formula 2, the water flow through the second heat exchanger and the temperature difference between the outlet and inlet water of the second heat exchanger (T ou -T in ) can be used to approximately calculate the heating capacity of the heat pump unit; when the ambient temperature and water temperature are constant and the water flow rate is fixed, the heating capacity of the heat pump unit is mainly determined by (T ou -T in ) is determined; therefore, the frequency control temperature value can be further corrected by formula 2; and when the compressor frequency is limited or reduced, the heating capacity of the heat pump unit can be taken into account to meet the user's use needs as much as possible, avoiding the situation where the heat pump unit is insufficient in heating due to premature frequency reduction.

[0212] T m0 Indicates the high pressure temperature slowly increases the preset value, T m0 The preset value range is 30~100℃, T m0 The preset default value is 58℃;

[0213] T x0 Indicates the high voltage temperature limit frequency rise preset value, T x0 The preset value range is 30~100℃, T x0 The default value is 60℃ by default;

[0214] T j0 Indicates the high pressure temperature frequency reduction preset value, T j0 The preset value range is 30~100℃, T j0 The preset default value is 62℃;

[0215] T t0 Indicates the preset value of high pressure temperature to stop the compressor, T t0 The preset value range is 30~100℃, T t0 The preset default value is 64℃;

[0216] Step S4: When the second ambient temperature range is met, that is, T h2 <T h ≤T h1 hour:

[0217] Step S4.1, when the heat pump heat exchange water temperature difference T ou -T in >Change water temperature correction value T n When the compressor load correction and heating capacity frequency control correction parameters are required;

[0218] Calculate T m =T m1 +Ti+K 3 T h ,

[0219] Calculate T x =T x1 +Ti+K 3 T h ,

[0220] Calculate T j =T j1 +Ti+K 3 T h ,

[0221] Calculate T t =T t1 +Ti+K 3 T h ;

[0222] Step S4.2, when T ou -T in ≤T n When , only the compressor load correction parameters need to be performed;

[0223] Calculate T m =T m1 +K 3 T h ,

[0224] Calculate T x =T x1 +K 3 T h ,

[0225] Calculate T j =T j1 +K 3 T h ,

[0226] Calculate T t =T t1 +K 3 T h ;

[0227] in:

[0228] T m1 Indicates the high pressure temperature slowly increases the preset value, T m1 The preset value range is 30~100℃, T m1 The preset default value is 63℃;

[0229] T x1 Indicates the high voltage temperature limit frequency rise preset value, Tx1 The preset value range is 30~100℃, T x1 The default value is 65℃ by default;

[0230] T j1 Indicates the high pressure temperature frequency reduction preset value, T j1 The preset value range is 30~100℃, T j1 The preset default value is 67℃;

[0231] T t1 Indicates the preset value of high pressure temperature to stop the compressor, T t1 The preset value range is 30~100℃, T t1 The preset default value is 69℃;

[0232] T h1 Indicates the preset value of ambient temperature, T h1 The preset value range is -40~55℃, T h1 The preset default value is -10℃;

[0233] T h2 Indicates the preset value of ambient temperature, T h2 The preset value range is -40~55℃, T h2 The preset default value is -20℃;

[0234] K 3 Indicates the compressor load correction factor, K 3 The optimal value is 0.5;

[0235] Step S5: When the third ambient temperature range is met, that is, when T h ≤T h2 hour:

[0236] Step S5.1, when the heat pump heat exchange water temperature difference T ou -T in >Change water temperature correction value T n When the compressor load correction and heating capacity frequency control correction parameters are required;

[0237] Calculate T m =T m2 +Ti+K 4 T h ,

[0238] Calculate T x =T x2 +Ti+K 4 T h ,

[0239] Calculate T j =T j2 +Ti+K4 T h ,

[0240] Calculate T t =T t2 +Ti+K 4 T h ;

[0241] Step S5.2, when T ou -T in ≤T n When , only the compressor load correction parameters need to be performed;

[0242] Calculate T m =T m2 +K 4 T h ,

[0243] Calculate T x =T x2 +K 4 T h ,

[0244] Calculate T j =T j2 +K 4 T h ,

[0245] Calculate T t =T t2 +K 4 T h ;

[0246] in:

[0247] T m2 Indicates the high pressure temperature slowly increases the preset value, T m2 The preset value range is 30~100℃, T m2 The preset default value is 67℃;

[0248] T x2 Indicates the high voltage temperature limit frequency rise preset value, T x2 The preset value range is 30~100℃, T x2 The preset default value is 69℃;

[0249] T j2 Indicates the high pressure temperature frequency reduction preset value, T j2 The preset value range is 30~100℃, T j2 The preset default value is 71°C;

[0250] T t2 Indicates the preset value of high pressure temperature to stop the compressor, T t2 The preset value range is 30~100℃, Tt2 The preset default value is 73℃;

[0251] In step S3, step S4 and step S5, respectively, T k , or P c , or dT ly / dt is used to control the operation of the compressor.

[0252] In this embodiment, when the air source heat pump is unable to collect the heat pump system pressure, the heat pump parameters are comprehensively analyzed through system parameters, and the system pressure range and heat pump heating conditions are estimated, so as to timely adjust the compressor operating state, improve the operating reliability of the compressor, ensure the reliability of user use, and take into account the heat pump heating amount and high-reliability operation of the system.

[0253] In addition, the control device of the heat pump system includes a memory and a processor coupled to the memory, and the processor is configured to execute the method of the above embodiment based on the instructions stored in the memory.

[0254] The memory may include, for example, a system memory, a fixed non-volatile storage medium, etc. The system memory may store, for example, an operating system, an application program, a boot loader, and other programs.

[0255] The control device of the heat pump system may also include an input / output interface, a network interface, a storage interface, etc. These interfaces, as well as the memory and the processor, may be connected, for example, via a bus. The input / output interface provides a connection interface for input / output devices such as a display, a mouse, a keyboard, and a touch screen. The network interface provides a connection interface for various networked devices. The storage interface provides a connection interface for external storage devices such as an SD card and a USB flash drive.

[0256] The embodiments disclosed in the present invention further provide an air source heat pump, comprising: a heat pump system and a control device of the heat pump system of the above embodiments.

[0257] The embodiments disclosed in the present invention further provide a computer-readable storage medium, including computer program instructions, which, when executed by a processor, implement the control method of the heat pump compressor of any of the above embodiments.

[0258] So far, the embodiments disclosed in the present invention have been described in detail. In order to avoid obscuring the concept of the present invention, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed here.

[0259] Those skilled in the art will appreciate that the embodiments disclosed in the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may be disclosed in the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Furthermore, the present invention may be disclosed in the form of a computer program product implemented on one or more computer-usable non-transient storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0260] The present disclosure is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present disclosure. It should be understood that the functions specified in one or more processes in the flowchart and / or one or more blocks in the block diagram can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate the functions for implementing the functions specified in the flowchart. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0261] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0262] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0263] The above-described embodiments are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. All equivalent changes made based on the shape, structure and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for controlling a heat pump compressor, characterized in that: The heat pump system includes a first heat exchanger arranged outdoors, a second heat exchanger using a water pump unit for water cooling and heat exchange, a compressor, a third heat exchanger for replenishing air to the compressor, a first electronic expansion valve arranged between the first heat exchanger and the third heat exchanger, and a second electronic expansion valve arranged between the third heat exchanger and the second heat exchanger. The compressor is connected between the first heat exchanger and the second heat exchanger through a refrigerant pipeline and a four-way valve. The control method of the heat pump compressor includes the following steps: Step S1: start the heat pump unit The heat pump unit starts to operate after starting the heating or hot water mode, and the controller collects the operating parameters of the heat pump unit; The parameters collected by the controller include the operating environment temperature T of the heat pump h , Heat exchanger inlet water temperature T in , heat exchanger outlet water temperature T ou , Heat exchanger refrigerant liquid pipe temperature T ly and compressor operating current value P c , the heat exchanger inlet water temperature T in , the heat exchanger outlet water temperature T ou and the refrigerant liquid pipe temperature T of the heat exchanger ly are the operating parameters corresponding to the second heat exchanger; Step S2: The compressor automatically operates and adjusts according to PID After the heat pump unit starts running for a period of time, the controller starts to comprehensively judge the changes in the compressor frequency control temperature value Tk, the compressor frequency control current value Pc and the refrigerant liquid pipe temperature. According to the following judgment and detection, the compressor operates according to the following conditions; Step S2.1, when T k <T m , or P c <P m , or T ly -T in ≥H y And dT ly / dt <G m When the compressor is running, the frequency of the compressor will automatically increase or decrease according to the fuzzy control parameters, and will not be affected by the correction of the heating capacity of the heat pump unit; Step S2.2, when T m ≤T k <T x , or P m ≤P c <P x , or T ly -T in ≥H y And G m ≤dT ly / dt <G x The compressor is controlled by deceleration and frequency increase. The compressor can increase the frequency by M frequency at most each time. The operation time is T x After a certain time, the heat pump unit is tested again as a deceleration and frequency increase condition, and the compressor frequency is increased to M frequency at most each time; Step S2.3, when T x ≤T k <T j , or P x ≤P c <P j , or T ly -T in ≥H y And G x ≤dT ly / dt <G j When the compressor is running, the frequency rise is limited to maintain the compressor frequency; Step S2.4, when T j ≤T k <T t , or P j ≤P c <P t , or T ly -T in ≥H y And G j ≤dT ly / dt <G t When the compressor frequency is reduced to N, the compressor frequency is reduced to N. After Ty time, the test is repeated. If T k If the frequency control temperature value still meets the conditions of this interval, the frequency reduction conditions of the heat pump unit will be tested again; Step S2.5, when T k ≥T t , or P c ≥P t , or T ly -T in ≥H y And dT ly / dt≥G t When the compressor stops running directly; Where: T k =T ou , T k Indicates the frequency control temperature value of the compressor frequency collected in real time; when the high-pressure sensor is not configured, the outlet water temperature T of the second heat exchanger is collected ou As an approximate substitute value for high-pressure temperature frequency control; or the outlet water temperature T of the second heat exchanger ou Using equivalent solution T ly Instead, use an equivalent solution T ly When replacing, the corresponding parameter values ​​need to be reassigned; in: M indicates that the compressor is subject to high pressure temperature and the frequency rises slowly. m Frequency of influence and limitation; Tx indicates that the compressor is subject to high pressure temperature and the frequency rises slowly. m Frequency operation time limited by impact; N represents the compressor frequency reduction value T due to high pressure temperature j The frequency of the reduction due to the influence; Ty represents the compressor frequency reduction value T due to high pressure temperature j The frequency running time is reduced due to the impact; T m It indicates the budgeted high-pressure temperature slow frequency rise value corrected according to the capacity of the heat pump unit; T x It indicates the budgeted high-pressure temperature limit frequency rise value corrected according to the capacity of the heat pump unit; T j It indicates the budgeted high-pressure temperature frequency reduction value after correction according to the capacity of the heat pump unit; T t It indicates the budgeted high pressure temperature compressor stop value corrected according to the heat pump unit capacity; H y Indicates the preset value of the refrigerant liquid pipe temperature participating in the compressor frequency control; dT1y / dt represents the rate of change of the refrigerant liquid pipe temperature collected by the controller; G m Indicates the preset value of the refrigerant liquid pipe temperature change rate to control the compressor to slowly increase the frequency; G x Indicates the preset value of the refrigerant liquid pipe temperature change rate to control the compressor frequency limit; G j Indicates the preset value of the refrigerant liquid pipe temperature change rate to control the compressor frequency reduction; G t Indicates the preset value for the refrigerant liquid pipe temperature change rate to control the compressor to stop; P m Indicates the preset value of the compressor current controlling the slow frequency increase of the compressor; P x Indicates the preset value of the compressor current control compressor limit frequency rise; P j Indicates the preset value of compressor current control compressor frequency reduction; P t Indicates the preset value of the compressor current to control the compressor to stop; Step S3: When the first ambient temperature range is met, that is, when T h >T h1 hour: Step S3.1, when the heat pump unit heats the water with a temperature difference T ou -T in >Variable water temperature correction value T n When the pressure is too high, correction is required; high pressure prediction correction is performed in real time, and compressor frequency reduction control is performed; Calculate T m =T m0 +Ti, Calculate T x =T x0 +Ti, Calculate T j =T j0 +Ti, Calculate T t =T t0 +Ti; Step S3.2, when T ou -T in ≤T n When , there is no need to increase the correction value. At this time, the heat pump system has sufficient high-pressure margin, and the heat pump unit can run freely to provide sufficient heating; Calculate T m =T m0 , Calculate T x =T x0 , Calculate T j =T j0 , Calculate T t =T t0 ; Where: Calculate T n =T in ×K1+K2, ------Formula 1 T n represents the variable water temperature reference frequency control correction value calculated according to the proposed calculation formula 1, which is associated with the water temperature; K1 represents the water temperature correction coefficient of the heat pump heating capacity; K2 represents the base value of the water temperature correction coefficient of the heat pump's heating capacity; By inlet water temperature T in Determine the basic correction value; the higher the water temperature, the lower the correction base value, and it is easier to meet the correction conditions; the lower the water temperature, the higher the correction base value, and it is more difficult to meet the correction conditions. If the water temperature is too low, no correction is required; Where: Calculate Ti = [S × (T ou -T in ) 2 +A×T n 2 +B×(T ou -T in )+C×T n +D×(T ou -T in )×T n +T0】------Formula 2 Ti represents the frequency control correction value related to the heating capacity of the heat pump calculated according to the simulated formula 2, which is associated with the operating capacity of the heat pump; S represents the frequency control correction coefficient; A represents the frequency control correction coefficient; B represents the frequency control correction coefficient; C represents the frequency control correction coefficient; D represents the frequency control correction coefficient; The water flow through the second heat exchanger, the temperature difference between the outlet and inlet water of the second heat exchanger (T ou -T in ) to approximately calculate the heating capacity of the heat pump unit; when the ambient temperature and water temperature are constant and the water flow rate is fixed, the heating capacity of the heat pump unit is mainly determined by (T ou -T in ) is determined; the frequency control temperature value is further corrected by formula 2; and when the compressor frequency is limited or reduced, the heating capacity of the heat pump unit can meet the user's use needs as much as possible, avoiding the situation where the heat pump unit is insufficient in heating capacity due to premature frequency reduction; T m0 Indicates the preset value of the high pressure temperature slowly increasing in frequency; T x0 Indicates the preset value of high-voltage temperature limit frequency increase; T j0 Indicates the preset value of high-voltage temperature frequency reduction; T t0 Indicates the preset value of high pressure temperature to stop the compressor; Step S4: When the second ambient temperature range is met, that is, T h2 <T h ≤T h1 hour: Step S4.1, when the heat pump heat exchange water temperature difference T ou -T in >Variable water temperature correction value T n When the compressor load correction and heating capacity frequency control correction parameters are required; Calculate T m =T m1 +Ti+K3T h , Calculate T x =T x1 +Ti+K3T h , Calculate T j =T j1 +Ti+K3T h , Calculate T t =T t1 +Ti+K3T h ; Step S4.2, when T ou -T in ≤T n When , only the compressor load correction parameters need to be performed; Calculate T m =T m1 +K3T h , Calculate T x =T x1 +K3T h , Calculate T j =T j1 +K3T h , Calculate T t =T t1 +K3T h ; in: T m1 Indicates the preset value of the high pressure temperature slowly increasing in frequency; T x1 Indicates the preset value of high-voltage temperature limit frequency increase; T j1 Indicates the preset value of high-voltage temperature frequency reduction; T t1 Indicates the preset value of high pressure temperature to stop the compressor; T h1 Indicates the preset value of ambient temperature; T h2 Indicates the preset value of ambient temperature; K3 represents the compressor load correction factor; Step S5: When the third ambient temperature range is met, that is, when T h ≤T h2 hour: Step S5.1, when the heat pump heat exchange water temperature difference T ou -T in >Variable water temperature correction value T n When the compressor load correction and heating capacity frequency control correction parameters are required; Calculate T m =T m2 +Ti+K4T h , Calculate T x =T x2 +Ti+K4T h , Calculate T j =T j2 +Ti+K4T h , Calculate T t =T t2 +Ti+K4T h ; Step S5.2, when T ou -T in ≤T n When , only the compressor load correction parameters need to be performed; Calculate T m =T m2 +K4T h , Calculate T x =T x2 +K4T h , Calculate T j =T j2 +K4T h , Calculate T t =T t2 +K4T h ; in: T m2 Indicates the preset value of the high pressure temperature slowly increasing in frequency; T x2 Indicates the preset value of high-voltage temperature limit frequency increase; T j2 Indicates the preset value of high-voltage temperature frequency reduction; T t2 Indicates the preset value of high pressure temperature to stop the compressor; In the step S3, the step S4 and the step S5, respectively, T k , or P c , or dT ly / dt is used to control the operation of the compressor.

2. A heat pump compressor control method according to claim 1, characterized in that: The step S2 also includes: M indicates that the compressor is subject to high pressure temperature and the frequency rises slowly. m The frequency affected and limited is preferably 2HZ; Tx indicates that the compressor is subject to high pressure temperature and the frequency rises slowly. m The frequency operation time limited by the impact is preferably 30s; N represents the compressor frequency reduction value T due to high pressure temperature j The frequency reduced by the influence is preferably 5HZ; Ty represents the compressor frequency reduction value T due to high pressure temperature j The frequency operation time reduced due to the impact is preferably 15s; H y Indicates the preset value of the refrigerant liquid pipe temperature participating in the compressor frequency control, H y The preset value range is 1~20℃, H y The preset default value is 7℃; dT1y / dt represents the rate of change of the refrigerant liquid pipe temperature collected by the controller, preferably collected once every 10 seconds; G m Indicates the preset value of the refrigerant liquid pipe temperature change rate to control the compressor to slowly increase the frequency, G m The preset value range is 0.01~5℃ / s, G m The default value is 0.05℃ / s; G x Indicates the preset value of the refrigerant liquid pipe temperature change rate to control the compressor frequency limit, G x The preset value range is 0.01~5℃ / s, G x The default value is 0.1℃ / s; G j Indicates the preset value of the refrigerant liquid pipe temperature change rate to control the compressor frequency reduction, G j The preset value range is 0.01~5℃ / s, and the default value of Gj is 0.15℃ / s; G t Indicates the preset value of the refrigerant liquid pipe temperature change rate to control the compressor to stop, G t The preset value range is 0.01~5℃ / s, G t The preset default value is 0.25℃ / s; P m Indicates the preset value of compressor current control compressor slow frequency increase, P m The preset value range is 1~80A, P m The preset default value is 20A; P x Indicates the preset value of compressor current control compressor frequency limit, P x The preset value range is 1~80A, P x The preset default value is 21A; P j Indicates the preset value of compressor current control compressor frequency reduction, P j The preset value range is 1~80A, P j The default value is 23A. P t Indicates the preset value of compressor current to control compressor stop, P t The preset value range is 1~80A, P t The default value is 30A.

3. The control method of a heat pump compressor according to claim 1, characterized in that: The step S3 also includes: K1 represents the water temperature correction coefficient of the heat pump heating capacity, and the optimal value of K1 is -0.2; K2 represents the base value of the water temperature correction coefficient of the heat pump's heating capacity, and the optimal value of K2 is 15.2; S represents the frequency control correction coefficient, and the optimal value of S is -0.25; A represents the frequency control correction coefficient, and the optimal value of A is 0.09; B represents the frequency control correction coefficient, and the optimal value of B is 0.75; C represents the frequency control correction coefficient, and the optimal value of C is -0.95; D represents the frequency control correction coefficient, and the optimal value of D is 0.2; T m0 Indicates the high pressure temperature slowly increases the preset value, T m0 The preset value range is 30~100℃, T m0 The preset default value is 58℃; T x0 Indicates the high voltage temperature limit frequency rise preset value, T x0 The preset value range is 30~100℃, T x0 The default value is 60℃ by default; T j0 Indicates the high pressure temperature frequency reduction preset value, T j0 The preset value range is 30~100℃, T j0 The preset default value is 62℃; T t0 Indicates the preset value of high pressure temperature to stop the compressor, T t0 The preset value range is 30~100℃, T t0 The default setting is 64°C.

4. The control method of a heat pump compressor according to claim 1, characterized in that: The step S4 also includes: T m1 Indicates the high pressure temperature slowly increases the preset value, T m1 The preset value range is 30~100℃, T m1 The default value is 63℃; Tx1 represents the high voltage temperature limit frequency rise preset value, T x1 The preset value range is 30~100℃, T x1 The default value is 65℃ by default; T j1 Indicates the high pressure temperature frequency reduction preset value, T j1 The preset value range is 30~100℃, T j1 The preset default value is 67℃; T t1 Indicates the preset value of high pressure temperature to stop the compressor, T t1 The preset value range is 30~100℃, T t1 The preset default value is 69℃; T h1 Indicates the preset value of ambient temperature, T h1 The preset value range is -40~55℃, T h1 The preset default value is -10℃; T h2 Indicates the preset value of ambient temperature, T h2 The preset value range is -40~55℃, T h2 The preset default value is -20℃; K3 represents the compressor load correction factor, and the optimal value is 0.

5.

5. The control method of a heat pump compressor according to claim 1, characterized in that: The step S5 also includes: T m2 Indicates the high pressure temperature slowly increases the preset value, T m2 The preset value range is 30~100℃, T m2 The preset default value is 67℃; T x2 Indicates the high voltage temperature limit frequency rise preset value, T x2 The preset value range is 30~100℃, T x2 The preset default value is 69℃; T j2 Indicates the high pressure temperature frequency reduction preset value, T j2 The preset value range is 30~100℃, T j2 The preset default value is 71°C; T t2 Indicates the preset value of high pressure temperature to stop the compressor, T t2 The preset value range is 30~100℃, T t2 The preset default value is 73°C.

6. A control device for a heat pump system, characterized in that: include: Memory; and A processor coupled to the memory is configured to execute the control method for a heat pump compressor according to any one of claims 1 to 5 based on instructions stored in the memory.

7. An air source heat pump, characterized in that: include: Heat pump system; and A control device for a heat pump system according to claim 6.

8. A computer-readable storage medium, characterized in that: The method comprises computer program instructions, wherein when the computer program instructions are executed by a processor, a control method for a heat pump compressor as claimed in any one of claims 1 to 5 is implemented.

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