A control method and device of an air source heat pump, a medium and an air source heat pump

Abstract

The present application relates to the technical field of air source heat pump control, and specifically provides an air source heat pump control method, device, medium and air source heat pump, aiming to solve the technical problem of how to more efficiently reduce the real-time evaporation temperature of the compressor of the air source heat pump. To this end, the air source heat pump control method of the present application comprises: obtaining the real-time evaporation temperature of the compressor of the air source heat pump, obtaining the difference between the real-time evaporation temperature and the preset maximum evaporation temperature based on the real-time evaporation temperature; and controlling the opening degree of the electronic expansion valve and / or the gear of the fan of the air source heat pump according to the difference. Through the above configuration mode, the present application can more efficiently reduce the real-time evaporation temperature of the compressor of the air source heat pump.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air source heat pump control, and specifically provides an air source heat pump control method, device, medium and air source heat pump. BACKGROUND

[0002] Air source heat pump heating mainly relies on the evaporator to absorb heat from the air; the higher the temperature of the air, the higher the evaporating temperature of the evaporator, that is, the higher the evaporating temperature of the compressor. However, the compressor will have a maximum limit of the evaporating temperature, and if the evaporating temperature of the compressor exceeds the limit, it may cause poor heat dissipation of the motor and cause damage to the compressor.

[0003] The prior art uses control of the fan speed to reduce the evaporating temperature of the compressor, and the control effect is poor, the evaporating temperature response is slow, and the control process may exceed the limit of the evaporating temperature. In addition, it is possible that the evaporating temperature of the compressor still exceeds the limit after the fan reaches the minimum speed, at which time the fan can only be stopped to reduce the evaporating temperature, and after the fan is stopped, the state of the unit fluctuates greatly, and the reliability of the air source heat pump and the service life of the compressor will be affected.

[0004] Only using fan control can only ensure that the maximum heating environment temperature (the temperature of the air) can reach 50℃, and cannot reach 55℃.

[0005] Correspondingly, there is a need in the art for a new air source heat pump control scheme to solve the above problems. SUMMARY

[0006] In order to overcome the above-mentioned defects, the present application is proposed to provide a solution or at least partially solve the technical problem of how to more efficiently reduce the real-time evaporating temperature of the compressor of the air source heat pump.

[0007] In a first aspect, the present application provides an air source heat pump control method, comprising:

[0008] obtaining the real-time evaporating temperature of the compressor of the air source heat pump, and obtaining the difference between the real-time evaporating temperature and a preset maximum evaporating temperature based on the real-time evaporating temperature;

[0009] controlling the opening degree of the electronic expansion valve and / or the gear of the fan of the air source heat pump according to the difference.

[0010] In one technical solution of the above-mentioned air source heat pump control method, the controlling the opening degree of the electronic expansion valve and / or the gear of the fan of the air source heat pump according to the difference comprises:

[0011] controlling the gear of the fan when the difference is greater than a first preset temperature; and / or,

[0012] When the difference is greater than a seventh preset temperature, the opening of the electronic expansion valve is controlled.

[0013] In one of the technical solutions of the control method of the air source heat pump, the control of the gear of the fan comprises:

[0014] Every interval of a first preset time length, the difference is obtained;

[0015] When the difference is greater than the first preset temperature and less than or equal to a second preset temperature, the fan is controlled to reduce a first preset gear;

[0016] When the difference is greater than the second preset temperature, the fan is controlled to reduce a second preset gear; wherein the second preset gear is greater than the first preset gear;

[0017] When the difference is greater than a third preset temperature and less than or equal to the first preset temperature, the fan is controlled to maintain the current gear;

[0018] When the difference is less than or equal to the third preset temperature, the control of the gear of the fan is exited;

[0019] When the difference is greater than the first preset temperature and the minimum of the fan gear, the compressor frequency of the air source heat pump is controlled.

[0020] In one of the technical solutions of the control method of the air source heat pump, the control of the compressor frequency of the air source heat pump comprises:

[0021] Based on the difference, the adjustment step number is obtained;

[0022] Every interval of a second preset time length, the difference is obtained;

[0023] When the difference is greater than a fourth preset temperature, the compressor frequency is increased according to the adjustment step number;

[0024] When the difference is less than or equal to the fourth preset temperature, the compressor frequency is maintained;

[0025] When the difference is greater than the fourth preset temperature and the compressor frequency reaches the maximum, a temperature warning information is sent;

[0026] Wherein, the fourth preset temperature is less than the first preset temperature and greater than the third preset temperature.

[0027] In one of the technical solutions of the control method of the air source heat pump, the adjustment step number is obtained based on the difference, which comprises obtaining the adjustment step number according to the following formula:

[0028] df = -1(Pst-Pstmax) x j

[0029] wherein df is the adjustment step, Pst is the real-time evaporation temperature, Pstmax is the preset maximum evaporation temperature, j is a constant and -j is less than the fourth preset temperature.

[0030] In one of the technical solutions of the control method of the air source heat pump, the control of the opening degree of the electronic expansion valve comprises:

[0031] obtaining a current environment temperature, and obtaining a suction superheat target value of the electronic expansion valve based on the current environment temperature;

[0032] obtaining a correction value based on the real-time evaporation temperature, and obtaining a corrected suction superheat target value of the electronic expansion valve according to the correction value and the suction superheat target value;

[0033] obtaining an adjustment step according to the corrected suction superheat target value and an actual suction superheat;

[0034] obtaining the difference value every third preset time interval;

[0035] when the difference value is greater than a seventh preset temperature, increasing the opening degree of the electronic expansion valve according to the adjustment step;

[0036] when the difference value is greater than the seventh preset temperature and the opening degree of the electronic expansion valve reaches a maximum, sending temperature warning information.

[0037] In one of the technical solutions of the control method of the air source heat pump, the obtaining of the correction value based on the real-time evaporation temperature comprises:

[0038] when the real-time evaporation temperature is greater than a fifth preset temperature, assigning the correction value as a third preset numerical value, when the real-time evaporation temperature is less than or equal to the fifth preset temperature and greater than a sixth preset temperature, assigning the correction value as a fourth preset numerical value, and when the real-time evaporation temperature is less than or equal to the sixth preset temperature and greater than the seventh preset temperature, assigning the correction value as a fifth preset numerical value, wherein the third preset numerical value is greater than the fourth preset numerical value which is greater than the fifth preset numerical value; and / or,

[0039] the obtaining of the corrected suction superheat target value of the electronic expansion valve according to the correction value and the suction superheat target value comprises obtaining the corrected suction superheat target value according to the following formula:

[0040] SH = SH1 + SH2

[0041] SH2=SH-SH1, wherein SH is the corrected suction superheat target value, SH2 is the correction value, SH1 is the suction superheat target value; and / or,

[0042] The adjustment step is obtained according to the corrected suction superheat target value and the actual suction superheat, and the adjustment step is obtained according to the following formula:

[0043] dp=g*(SH'-SH)+h

[0044] wherein dp is the adjustment step, SH' is the actual suction superheat, and g and h are constants.

[0045] In a second aspect, a control device is provided, which includes at least one processor and at least one storage device adapted to store a plurality of program codes adapted to be loaded and run by the processor to perform the control method of the air source heat pump according to any one of the technical solutions of the control method of the air source heat pump.

[0046] In a third aspect, a computer readable storage medium is provided, which has a plurality of program codes stored therein, the program codes being adapted to be loaded and run by a processor to perform the control method of the air source heat pump according to any one of the technical solutions of the control method of the air source heat pump.

[0047] In a fourth aspect, an air source heat pump is provided, which includes the control device according to the technical solution of the control device.

[0048] The above one or more technical solutions of the present application have at least one or more of the following advantages

[0049] Beneficial effects:

[0050] In the implementation of the technical solutions of the present application, the real-time evaporation temperature of the compressor of the air source heat pump is first obtained, and the difference between the real-time evaporation temperature and the preset maximum evaporation temperature is obtained based on the real-time evaporation temperature; the opening of the electronic expansion valve of the air source heat pump and / or the gear of the fan are controlled according to the difference. Through the above configuration, the opening of the electronic expansion valve of the air source heat pump and the gear of the fan are controlled, the response speed of reducing the real-time evaporation temperature is improved, the opening of the electronic expansion valve of the air source heat pump and the gear of the fan are controlled differently according to the different intervals of the difference, the air source heat pump is stably operated under the premise of ensuring the performance of the air source heat pump, and the real-time evaporation temperature of the compressor of the air source heat pump is more efficiently reduced, so that the compressor of the air source heat pump can normally operate at a higher heating environment temperature (above 55℃). BRIEF DESCRIPTION OF DRAWINGS

[0051] The disclosure of the present application will become more fully understood from the detailed description given herein below, and appended claims, accompanied by the accompanying drawings. It is to be understood that the drawings are only for the purpose of illustration:

[0052] Figure 1 is a main step flowchart diagram of a control method of an air source heat pump according to an embodiment of the present application;

[0053] Figure 2 is a main step flowchart diagram of a control method of an air source heat pump according to an embodiment of the present application. DETAILED DESCRIPTION

[0054] Some embodiments of the present application will be described herein below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present application, and are not intended to limit the protection scope of the present application.

[0055] In the description of the present application, "module" and "processor" can include hardware, software or a combination of both. A module can include hardware circuitry, various suitable sensors, communication ports, memories, and can also include a software part such as program code, and can be a combination of software and hardware. The processor can be a central processor, a microprocessor, a graphic processor, a digital signal processor or any other suitable processor. The processor has data and / or signal processing functions. The processor can be implemented in software, hardware or a combination of both. The non-transitory computer readable storage medium includes any suitable medium that can store program code, such as a magnetic disk, a hard disk, an optical disk, a flash memory, a read-only memory, a random access memory, etc. The term "A and / or B" means all possible combinations of A and B, such as only A, only B or both A and B. The term "at least one of A or B" or "at least one of A and B" has a similar meaning as "A and / or B", and can include only A, only B or both A and B. The singular form of the term "one", "this" can also include the plural form.

[0056] Referring to the drawings, Figure 1 , Figure 1 is a main step flowchart diagram of a control method of an air source heat pump according to an embodiment of the present application. As shown in Figure 1 , the control method of the air source heat pump in the embodiment of the present application mainly includes the following steps S101-S102.

[0057] Step S101: obtaining the real-time evaporation temperature of the compressor of the air source heat pump, and obtaining the difference between the real-time evaporation temperature and the preset maximum evaporation temperature based on the real-time evaporation temperature.

[0058] In the embodiment, the real-time evaporation temperature of the compressor of the air source heat pump is acquired, and a difference between the real-time evaporation temperature and a preset maximum evaporation temperature is acquired according to the real-time evaporation temperature. The maximum evaporation temperature can be customized by a person skilled in the art according to actual conditions.

[0059] In an embodiment, the air source heat pump can be a single-stage compression air source heat pump or a cascade air source heat pump.

[0060] Step S102: controlling the opening degree of the electronic expansion valve and / or the gear of the fan of the air source heat pump according to the difference.

[0061] In the embodiment, the opening degree of the electronic expansion valve and the gear of the fan of the air source heat pump can be controlled according to the difference, so as to reduce the real-time evaporation temperature of the air source heat pump.

[0062] In an embodiment, step S102 can include the following step S1021.

[0063] Step S1021: controlling the gear of the fan when the difference is greater than a first preset temperature.

[0064] In the embodiment, when the difference is greater than the first preset temperature, the gear of the fan can be controlled to reduce the real-time evaporation temperature by controlling the gear of the fan. The first preset temperature and the seventh preset temperature can be customized by a person skilled in the art according to actual conditions.

[0065] In an embodiment, step S102 can include the following step S1022.

[0066] Step S1022: controlling the opening degree of the electronic expansion valve when the difference is greater than a seventh preset temperature.

[0067] In the embodiment, when the difference is greater than the seventh preset temperature, the opening degree of the electronic expansion valve can be controlled to reduce the real-time evaporation temperature by controlling the opening degree of the electronic expansion valve.

[0068] In an embodiment, the first preset temperature can be less than the seventh preset temperature, when the difference is greater than the first preset temperature and less than or equal to the seventh preset temperature, only the gear of the fan can be controlled, and when the difference is greater than the seventh preset temperature, the opening degree of the electronic expansion valve is controlled.

[0069] The opening degree of the electronic expansion valve is controlled as a supplement to the control of the gear of the fan to reduce the real-time evaporation temperature of the compressor, so that the real-time evaporation temperature of the compressor of the air source heat pump can be more effectively controlled.

[0070] In one embodiment, the first preset temperature can be greater than the seventh preset temperature, when the difference is greater than the seventh preset temperature and less than or equal to the first preset temperature, only the opening degree of the electronic expansion valve can be controlled, and when the difference is greater than the first preset temperature, the gear of the fan is controlled.

[0071] In one embodiment, the first preset temperature can be equal to the seventh preset temperature, when the difference is greater than the seventh preset temperature, the opening degree of the electronic expansion valve and the gear of the fan can be controlled simultaneously.

[0072] In one embodiment, the step S1021 can include the following steps S10211 to S10216:

[0073] Step S10211: every interval of a first preset time, the difference is obtained.

[0074] Step S10212: when the difference is greater than a first preset temperature and less than or equal to a second preset temperature, the fan is controlled to reduce a first preset gear.

[0075] Step S10213: when the difference is greater than the second preset temperature, the fan is controlled to reduce a second preset gear; wherein the second preset gear is greater than the first preset gear.

[0076] Step S10214: when the difference is greater than a third preset temperature and less than or equal to the first preset temperature, the fan is controlled to maintain the current gear.

[0077] Step S10215: when the difference is less than or equal to the third preset temperature, the control of the gear of the fan is exited.

[0078] Step S10216: when the difference is greater than the first preset temperature and the minimum of the gear of the fan, the frequency of the compressor of the air source heat pump is controlled.

[0079] In the embodiment, every interval of the first preset time length, the difference value is obtained, when the difference value is greater than the first preset temperature and less than or equal to the second preset temperature, the real-time evaporation temperature is high, and the fan needs to be controlled to reduce the first preset gear to reduce the real-time evaporation temperature. When the difference value is greater than the second preset temperature, the real-time evaporation temperature is the highest, and the fan needs to be controlled to reduce the second preset gear to reduce the real-time evaporation temperature. The second preset gear is greater than the first preset gear. When the difference value is greater than the third preset temperature and less than or equal to the first preset temperature, the real-time evaporation temperature is low, and the fan only needs to be controlled to maintain the current gear to reduce the real-time evaporation temperature. When the difference value is less than or equal to the third preset temperature, the control of the gear of the fan is exited. When the difference value is greater than the first preset temperature and the minimum of the gear of the fan, the fan cannot be controlled to reduce the gear, and the compressor frequency of the air source heat pump needs to be controlled to reduce the real-time evaporation temperature. The first preset temperature, the second preset temperature and the third preset temperature are all less than zero, and under the premise of meeting the above various value size relationships, the first preset time length, the second preset temperature, the third preset temperature, the fifth preset temperature, the sixth preset temperature, the first preset gear and the second preset gear can be customized according to actual conditions by those skilled in the art.

[0080] The control of the compressor frequency of the air source heat pump is used as a supplement to the control of the gear of the fan and the opening control of the electronic expansion valve to reduce the real-time evaporation temperature of the compressor. The multiple control of the real-time evaporation temperature responds quickly, the highest heating environment temperature of the compressor of the air source heat pump can be increased to above 55℃, and the problem that the upper limit of the real-time evaporation temperature is occasionally exceeded due to the insufficient control precision of the traditional fan can be effectively avoided. In addition, the fan does not stop running during the operation of the air source heat pump, and the stable operation of the air source heat pump can be ensured.

[0081] In one embodiment, as shown in Table 1, Table 1 is a gear and direct current fan speed reference table, 0 gear is a fan stop gear, and 1 gear is the smallest gear of the fan. Fan1 is the direct current fan speed corresponding to 1 gear, and the size of Fan1 is determined by the performance of the fan. Fan n to Fan0 decrease in turn.

[0082] Table 1: Gear and direct current fan speed reference table

[0083] Gear Direct current fan speed 0 Fan0 1 Fan1 2 Fan2 … … n Fann

[0084] In one embodiment, step S10216 can include the following steps S102161 to step S102165:

[0085] Step S102161: obtaining an adjustment step number based on the difference value.

[0086] Step S102162: every interval of the second preset time length, the difference value is obtained.

[0087] Step S102163: When the difference is greater than a fourth preset temperature, increasing the compressor frequency according to the adjustment step number.

[0088] Step S102164: When the difference is less than or equal to the fourth preset temperature, maintaining the compressor frequency.

[0089] Step S102165: When the difference is greater than the fourth preset temperature and the compressor frequency reaches a maximum, sending a temperature warning information, wherein the fourth preset temperature is less than the first preset temperature and greater than the third preset temperature.

[0090] In the embodiment, the adjustment step number of the compressor is obtained based on the difference, and the difference is obtained every second preset time length. When the difference is greater than the fourth preset temperature, the compressor frequency is increased according to the adjustment step number to reduce the real-time evaporation temperature. When the difference is less than or equal to the fourth preset temperature, the compressor frequency is maintained. When the difference is greater than the fourth preset temperature and the compressor frequency reaches a maximum, the compressor frequency cannot be increased, and a temperature warning information is sent to prompt the user that the real-time evaporation temperature may exceed the preset maximum evaporation temperature. Under the premise that the fourth preset temperature is less than the first preset temperature and greater than the third preset temperature, the second preset time length and the fourth preset temperature can be customized by the person skilled in the art according to the actual situation.

[0091] In one embodiment, step S102161 can further include obtaining the adjustment step number according to the following formula (1):

[0092] df = -1 / (Pst-Pstmax) x j (1)

[0093] Wherein, df is the adjustment step number, Pst is the real-time evaporation temperature, Pstmax is the preset maximum evaporation temperature, and j is a constant and -j is less than the fourth preset temperature.

[0094] In one embodiment, step S1022 can include the following steps S10221 to S10226:

[0095] Step S10221: Obtain the current environment temperature, and obtain the suction superheat target value of the electronic expansion valve based on the current environment temperature.

[0096] Step S10222: Obtain a correction value based on the real-time evaporation temperature, and obtain a corrected suction superheat target value of the electronic expansion valve according to the correction value and the suction superheat target value.

[0097] Step S10223: Obtain an adjustment step width according to the corrected suction superheat target value and the actual suction superheat.

[0098] Step S10224: Obtain the difference every third preset time length.

[0099] Step S10225: When the difference is greater than the seventh preset temperature, increasing the opening degree of the electronic expansion valve according to the adjustment step.

[0100] Step S10226: When the difference is greater than the seventh preset temperature and the opening degree of the electronic expansion valve reaches the maximum, sending temperature warning information.

[0101] In the embodiment, the current environment temperature is obtained, the suction superheat target value of the electronic expansion valve is obtained based on the current environment temperature, the adjustment step of the electronic expansion valve is obtained according to the corrected suction superheat target value and the actual suction superheat, the difference is obtained every third preset time interval, when the difference is greater than the seventh preset temperature, the opening degree of the electronic expansion valve is increased according to the adjustment step to reduce the real-time evaporation temperature, when the difference is greater than the seventh preset temperature and the opening degree of the electronic expansion valve reaches the maximum, the opening degree of the electronic expansion valve cannot continue to increase, and the temperature warning information is sent to prompt the user that the real-time evaporation temperature may exceed the preset maximum evaporation temperature. The third preset time interval can be customized by the person skilled in the art according to the actual situation.

[0102] In one embodiment, as shown in Table 2, Table 2 is a reference table of the current environment temperature, the suction superheat target value and the initial opening degree of the electronic expansion valve, and the suction superheat target value SH1 can be determined by detecting the current environment temperature against Table 2. Wherein, Tao is the current environment temperature, EEV1 to EEVn are all positive integers, and each parameter in Table 2 is an empirical value.

[0103] Table 2: Reference table of current environment temperature, suction superheat target value and initial opening degree of electronic expansion valve

[0104]

[0105] In one embodiment, step S10222 can further include step S102221:

[0106] Step S102221: When the real-time evaporation temperature is greater than the fifth preset temperature, the correction value is assigned to the third preset value, when the real-time evaporation temperature is less than or equal to the fifth preset temperature and greater than the sixth preset temperature, the correction value is assigned to the fourth preset value, and when the real-time evaporation temperature is less than or equal to the sixth preset temperature and greater than the seventh preset temperature, the correction value is assigned to the fifth preset value, wherein the third preset value is greater than the fourth preset value, and the fourth preset value is greater than the fifth preset value.

[0107] In the embodiment, when the real-time evaporation temperature is greater than the fifth preset temperature, the correction value is assigned to a third preset value; when the real-time evaporation temperature is less than or equal to the fifth preset temperature and greater than the sixth preset temperature, the correction value is assigned to a fourth preset value; when the real-time evaporation temperature is less than or equal to the sixth preset temperature and greater than the seventh preset temperature, the correction value is assigned to a fifth preset value, wherein the third preset value is greater than the fourth preset value, the fourth preset value is greater than the fifth preset value, the fifth preset value is greater than zero, zero is greater than the fifth preset temperature, the fifth preset temperature is greater than the sixth preset temperature, and the sixth preset temperature is greater than the seventh preset temperature. Under the premise of satisfying the above various value size relationships, the fifth preset temperature, the sixth preset temperature, the seventh preset temperature, the third preset value, the fourth preset value, and the fifth preset value can be self-defined according to actual conditions by those skilled in the art.

[0108] In one embodiment, step S10222 can further include obtaining the corrected suction superheat target value according to the following formula (2):

[0109] SH = SH1 + SH2 (2)

[0110] wherein SH is the corrected suction superheat target value, SH2 is the correction value, and SH1 is the suction superheat target value.

[0111] In one embodiment, step S10223 can further include obtaining the adjustment step according to the following formula (3):

[0112] dp = g x (SH' - SH) + h (3)

[0113] wherein dp is the adjustment step, SH' is the actual suction superheat, and g and h are both constants.

[0114] Based on the above steps S101-S102, the present application obtains the real-time evaporation temperature of the compressor of the air source heat pump, obtains the difference between the real-time evaporation temperature and the preset maximum evaporation temperature based on the real-time evaporation temperature, and controls the opening degree of the electronic expansion valve and / or the gear of the fan of the air source heat pump according to the difference. Through the above configuration, the present application controls the opening degree of the electronic expansion valve and the gear of the fan of the air source heat pump, improves the response speed of reducing the real-time evaporation temperature, controls the opening degree of the electronic expansion valve and the gear of the fan of the air source heat pump differently according to the different intervals of the difference, ensures the performance of the air source heat pump, and makes the air source heat pump operate more stably and reduce the real-time evaporation temperature of the compressor of the air source heat pump more efficiently, so that the compressor of the air source heat pump can operate normally at a higher heating environment temperature (above 55℃).

[0115] In one embodiment of the present application, the above-mentioned steps can be implemented by referring to the flow chart of Fig. 6. Figure 2 , Figure 2is a main step flowchart of a control method of an air source heat pump according to an embodiment of the present application, as shown in Figure 2 The control method of the air source heat pump can include the following steps S20100 to S20119.

[0116] Step S20100: start-up (start-up of the air source heat pump).

[0117] In the present embodiment, steps S20101 and S20113 can be executed after the start-up of the air source heat pump.

[0118] Step S20101: control the gear of the fan when the difference between the real-time evaporation temperature and the preset maximum evaporation temperature is greater than a first preset temperature.

[0119] In the present embodiment, the method described in step S20101 is similar to the method described in the aforementioned step S1021, and is not described again here for simplicity.

[0120] Step S20102: obtain the difference every first preset time interval.

[0121] In the present embodiment, the method described in step S20102 is similar to the method described in the aforementioned step S10211, and is not described again here for simplicity.

[0122] Step S20103: control the fan to decrease by a first preset gear when the difference is greater than the first preset temperature and less than or equal to a second preset temperature.

[0123] In the present embodiment, the method described in step S20103 is similar to the method described in the aforementioned step S10212, and is not described again here for simplicity.

[0124] Step S20104: control the fan to decrease by a second preset gear when the difference is greater than the second preset temperature.

[0125] In the present embodiment, the method described in step S20104 is similar to the method described in the aforementioned step S10213, and is not described again here for simplicity.

[0126] Step S20105: control the fan to maintain the current gear when the difference is greater than a third preset temperature and less than or equal to the first preset temperature.

[0127] In the present embodiment, the method described in step S20105 is similar to the method described in the aforementioned step S10214, and is not described again here for simplicity.

[0128] Step S20106: exit the control of the gear of the fan when the difference is less than or equal to the third preset temperature.

[0129] In the embodiment, the method in step S20106 is similar to the method in the aforementioned step S10215, and thus is not described herein again for simplicity.

[0130] Step S20107: Controlling the frequency of the compressor of the air source heat pump when the difference is greater than the first preset temperature and the minimum of the fan gear.

[0131] In the embodiment, the method in step S20107 is similar to the method in the aforementioned step S10216, and thus is not described herein again for simplicity.

[0132] Step S20108: Obtaining the adjustment step number based on the difference.

[0133] In the embodiment, the method in step S20108 is similar to the method in the aforementioned step S102161, and thus is not described herein again for simplicity.

[0134] Step S20109: Obtaining the difference every second preset time length.

[0135] In the embodiment, the method in step S20109 is similar to the method in the aforementioned step S102162, and thus is not described herein again for simplicity.

[0136] Step S20110: Increasing the frequency of the compressor according to the adjustment step number when the difference is greater than the fourth preset temperature.

[0137] In the embodiment, the method in step S20110 is similar to the method in the aforementioned step S102163, and thus is not described herein again for simplicity.

[0138] Step S20111: Maintaining the frequency of the compressor when the difference is less than or equal to the fourth preset temperature.

[0139] In the embodiment, the method in step S20111 is similar to the method in the aforementioned step S102164, and thus is not described herein again for simplicity.

[0140] Step S20112: Sending temperature warning information when the difference is greater than the fourth preset temperature and the frequency of the compressor reaches the maximum.

[0141] In the embodiment, the method in step S20112 is similar to the method in the aforementioned step S102165, and thus is not described herein again for simplicity.

[0142] Step S20113: Controlling the opening of the electronic expansion valve when the difference between the real-time evaporation temperature and the preset maximum evaporation temperature is greater than the seventh preset temperature.

[0143] In the embodiment, the method in step S20113 is similar to the method in the aforementioned step S1022, and thus is not described herein again for simplicity.

[0144] Step S20114: Obtain the current ambient temperature, and obtain the suction superheat target value of the electronic expansion valve based on the current ambient temperature.

[0145] In the embodiment, the method in step S20114 is similar to the method in the aforementioned step S10221, and thus is not described herein again for simplicity.

[0146] Step S20115: Obtain the correction value based on the real-time evaporation temperature, and obtain the corrected suction superheat target value of the electronic expansion valve according to the correction value and the suction superheat target value.

[0147] In the embodiment, the method in step S20115 is similar to the method in the aforementioned step S10222, and thus is not described herein again for simplicity.

[0148] Step S20116: Obtain the adjustment step according to the corrected suction superheat target value and the actual suction superheat.

[0149] In the embodiment, the method in step S20116 is similar to the method in the aforementioned step S10223, and thus is not described herein again for simplicity.

[0150] Step S20117: Obtain the difference value every third preset time length.

[0151] In the embodiment, the method in step S20117 is similar to the method in the aforementioned step S10224, and thus is not described herein again for simplicity.

[0152] Step S20118: When the difference value is greater than the seventh preset temperature, increase the opening degree of the electronic expansion valve according to the adjustment step.

[0153] In the embodiment, the method in step S20118 is similar to the method in the aforementioned step S10225, and thus is not described herein again for simplicity.

[0154] Step S20119: When the difference value is greater than the seventh preset temperature and the opening degree of the electronic expansion valve reaches the maximum, send the temperature warning information.

[0155] In the embodiment, the method in step S20119 is similar to the method in the aforementioned step S10226, and thus is not described herein again for simplicity.

[0156] It should be noted that although the above embodiments describe the steps in a specific order, those skilled in the art can understand that in order to achieve the effect of the present application, the different steps do not have to be executed in such an order, they can be executed simultaneously (in parallel) or in other orders, and these changes are within the protection scope of the present application.

[0157] Those skilled in the art can understand that all or part of the processes in the method of the above embodiment of the present application can also be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a computer readable storage medium. When the processor executes the computer program, the steps of each method embodiment described above can be implemented. The computer program includes computer program code, which can be in the form of source code, object code, executable files or some intermediate forms, etc. The computer readable storage medium can include any entity or device, medium, U disk, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory, random access memory, electrical carrier signal, telecommunication signal and software distribution medium, etc. that can carry the computer program code. It should be noted that the contents included in the computer readable storage medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction, for example, in some jurisdictions, according to legislation and patent practice, the computer readable storage medium does not include electrical carrier signals and telecommunication signals.

[0158] Further, the present application also provides a control device. In an embodiment of the control device according to the present application, the control device includes a processor and a storage device, the storage device can be configured to store the program of the control method of the air source heat pump for executing the above method embodiments, and the processor can be configured to execute the program in the storage device, which includes but is not limited to the program of the control method of the air source heat pump for executing the above method embodiments. For the convenience of description, only the parts related to the embodiments of the present application are shown, and the specific technical details not disclosed are referred to the method part of the embodiments of the present application. The control device can be a control device device formed by various electronic devices.

[0159] In the embodiments of the present application, the control device can be a control device apparatus formed by various electronic devices. In some possible implementation manners, the control device can include a plurality of storage devices and a plurality of processors. The program of the control method of the air source heat pump according to the method embodiments can be divided into a plurality of sub-programs, each of which can be loaded and run by the processor to perform different steps of the control method of the air source heat pump according to the method embodiments. Specifically, each sub-program can be stored in a different storage device, and each processor can be configured to execute the program in one or more storage devices to jointly implement the control method of the air source heat pump according to the method embodiments, that is, each processor executes different steps of the control method of the air source heat pump according to the method embodiments to jointly implement the control method of the air source heat pump according to the method embodiments.

[0160] The plurality of processors can be processors deployed on the same device, for example, the control device can be a high-performance device composed of a plurality of processors, and the plurality of processors can be processors configured on the high-performance device. In addition, the plurality of processors can also be processors deployed on different devices, for example, the control device can be a server cluster, and the plurality of processors can be processors on different servers in the server cluster.

[0161] Further, the present application also provides a computer readable storage medium. In an embodiment of the computer readable storage medium according to the present application, the computer readable storage medium can be configured to store a program for executing the control method of the air source heat pump according to the method embodiments, which can be loaded and run by the processor to implement the control method of the air source heat pump. For ease of illustration, only the part related to the embodiments of the present application is shown, and the specific technical details are not disclosed. The computer readable storage medium can be a storage device apparatus formed by various electronic devices. Optionally, the computer readable storage medium in the embodiments of the present application is a non-transitory computer readable storage medium.

[0162] Further, the present application also provides an air source heat pump. In an embodiment of the air source heat pump according to the present application, the air source heat pump can include the control device in the embodiments of the control device.

[0163] Further, it should be understood that, since the setting of each module is only for illustrating the functional units of the device of the present application, the physical device corresponding to the module can be the processor itself, or a part of software, a part of hardware, or a part of combination of software and hardware in the processor. Therefore, the number of each module in the figure is only illustrative.

[0164] Those skilled in the art can understand that the various modules in the device can be adaptively split or combined. Such splitting or combining of specific modules does not cause the technical solution to deviate from the principles of the present application, and therefore, the technical solutions after splitting or combining will fall within the protection scope of the present application.

[0165] So far, the technical solutions of the present application have been described in combination with the preferred embodiments shown in the drawings, but those skilled in the art can easily understand that the protection scope of the present application is obviously not limited to these specific embodiments. Those skilled in the art can make equivalent changes or replacements to the related technical features without deviating from the principles of the present application, and the technical solutions after such changes or replacements will fall within the protection scope of the present application.

Claims

1. A control method of an air source heat pump, characterized by, The method comprises: acquiring a real-time evaporation temperature of a compressor of the air source heat pump, and acquiring a difference between the real-time evaporation temperature and a preset maximum evaporation temperature based on the real-time evaporation temperature; controlling an opening degree of an electronic expansion valve and / or a gear of a fan of the air source heat pump according to the difference; the controlling of the opening degree of the electronic expansion valve and / or the gear of the fan according to the difference comprises: when the difference is greater than a first preset temperature, controlling the gear of the fan; the controlling of the gear of the fan comprises: acquiring the difference every first preset time interval; when the difference is greater than the first preset temperature and less than or equal to a second preset temperature, controlling the fan to decrease by a first preset gear; when the difference is greater than the second preset temperature, controlling the fan to decrease by a second preset gear; wherein the second preset gear is greater than the first preset gear; when the difference is greater than a third preset temperature and less than or equal to the first preset temperature, controlling the fan to maintain a current gear.

2. The control method of an air source heat pump according to claim 1, characterized by, the controlling of the opening degree of the electronic expansion valve and / or the gear of the fan according to the difference comprises: when the difference is greater than a seventh preset temperature, controlling the opening degree of the electronic expansion valve.

3. The control method of an air source heat pump according to claim 2, characterized by, the controlling of the gear of the fan comprises: when the difference is less than or equal to the third preset temperature, exiting the control of the gear of the fan; when the difference is greater than the first preset temperature and a minimum of the gear of the fan, controlling a compressor frequency of the air source heat pump.

4. The control method of an air source heat pump according to claim 3, characterized by, the controlling of the compressor frequency of the air source heat pump comprises: acquiring an adjustment step number based on the difference; acquiring the difference every second preset time interval; when the difference is greater than a fourth preset temperature, increasing the compressor frequency according to the adjustment step number; when the difference is less than or equal to the fourth preset temperature, maintaining the compressor frequency; when the difference is greater than the fourth preset temperature and the compressor frequency reaches a maximum, sending a temperature warning information; wherein the fourth preset temperature is less than the first preset temperature and greater than the third preset temperature.

5. The control method of an air source heat pump according to claim 4, characterized by, the acquiring of the adjustment step number based on the difference comprises acquiring the adjustment step number according to the following formula: wherein df is the number of said adjustment steps, Pst is said real-time evaporation temperature, Pstmax is said preset maximum evaporation temperature, j is a constant and -j is less than said fourth preset temperature.

6. The control method of an air source heat pump according to claim 2, characterized by, the controlling of the opening degree of the electronic expansion valve comprises: acquiring a current ambient temperature, and acquiring a suction superheat target value of the electronic expansion valve based on the current ambient temperature; acquiring a correction value based on the real-time evaporation temperature, and acquiring a corrected suction superheat target value of the electronic expansion valve according to the correction value and the suction superheat target value; acquiring an adjustment step width according to the corrected suction superheat target value and an actual suction superheat; acquiring the difference every third preset time interval; when the difference is greater than a seventh preset temperature, increasing the opening degree of the electronic expansion valve according to the adjustment step width; when the difference is greater than the seventh preset temperature and the opening degree of the electronic expansion valve reaches a maximum, sending a temperature warning information.

7. The control method of an air source heat pump according to claim 6, characterized by, the acquiring of the correction value based on the real-time evaporation temperature comprises: when the real-time evaporation temperature is greater than a fifth preset temperature, assigning the correction value as a third preset numerical value, when the real-time evaporation temperature is less than or equal to the fifth preset temperature and greater than a sixth preset temperature, assigning the correction value as a fourth preset numerical value, when the real-time evaporation temperature is less than or equal to the sixth preset temperature and greater than a seventh preset temperature, assigning the correction value as a fifth preset numerical value, wherein the third preset numerical value is greater than the fourth preset numerical value which is greater than the fifth preset numerical value; and / or, the correction value and the suction superheat target value to obtain a corrected suction superheat target value of the electronic expansion valve, comprising obtaining the corrected suction superheat target value according to the following formula: SH = SH1 + SH2 wherein SH is the corrected suction superheat target value, SH2 is the correction value, SH1 is the suction superheat target value; and / or, the correction value and the actual suction superheat to obtain an adjustment step, comprising obtaining the adjustment step according to the following formula: wherein dp is the adjustment step, SH' is the actual suction superheat, and g and h are constants.

8. A control device comprising at least one processor and at least one storage device adapted to store a plurality of program codes, characterized in that, The program code is adapted to be loaded and run by the processor to execute the control method of the air source heat pump in any one of claims 1 to 7.

9. A computer readable storage medium having stored therein a plurality of program codes, characterized in that, The program code is adapted to be loaded and run by the processor to execute the control method of the air source heat pump in any one of claims 1 to 7.

10. An air source heat pump characterised in that, The air source heat pump comprises the control device of claim 8. The air source heat pump comprises the control device of claim 8.

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