A system and adaptation method suitable for a wind energy direct drive heat pump unit

Abstract

The present application relates to a kind of system and adaptation method suitable for wind energy direct drive heat pump unit;The system includes temperature module, wind speed module, rotational speed module, control unit, air supplementing enthalpy increasing pipeline solenoid valve and evaporator bypass solenoid valve;The control flow of adaptation method includes temperature control, rotational speed control and wind speed control;After adaptation method is started, temperature, rotational speed and wind speed control are carried out in parallel until all controls are cancelled by user.The present application can effectively solve the problem that existing control scheme is difficult to operate at low wind speed, and can effectively improve the rated operating wind speed of wind heat pump, can effectively improve the rated heating capacity of wind heat pump, for the equipment without using this scheme, the present application can improve the heating capacity by about 35%.The present application can also effectively improve the efficiency of wind energy utilization.

Description

Technical Field

[0001] This invention relates to the field of wind power heating technology, and in particular to a system and adaptation method suitable for wind power direct-drive heat pump units. Background Technology

[0002] Direct-drive wind power heating is an emerging form of wind energy utilization. It directly uses the mechanical energy generated by wind turbines for heating. Northern my country has abundant wind resources, with high wind power levels during the cold season. Wind power heating can significantly alleviate environmental pollution caused by coal-fired heating in the region during winter.

[0003] Currently, wind power heating has three directions: wind-driven direct-drive electromagnetic eddy current heating, wind-driven direct-drive stirring heating, and wind-driven direct-drive heat pump heating. Among them, the energy efficiency ratio of wind-driven direct-drive heat pump heating scheme can exceed 100%, reaching over 300%, and has broad development prospects. Currently, wind-driven direct-drive heating equipment is only in the laboratory stage; there are no commercially available wind-driven direct-drive heating devices on the market. While wind turbine and heat pump technologies are relatively mature, there are still no mature commercial prototypes of wind-driven direct-drive heat pumps. The matching of wind turbines and heating equipment is one of the factors restricting the development of wind power heating. Currently, the hardware matching of wind-driven direct-drive heat pumps uses a mechanical transmission device to transfer the mechanical energy generated by the wind turbine to the heat pump compressor after being accelerated at a fixed speed ratio. The software adopts a "wind turbine + heat pump" control system. The wind turbine is responsible for controlling related equipment, while the heat pump unit uses traditional air conditioning refrigeration control methods.

[0004] Among the several wind-powered direct-drive heating control schemes retrieved, "A Temperature-Controlled Wind-Powered Heating Device" (application number: 201310692604.2) employs a temperature control scheme, which controls the input speed of the wind turbine by monitoring the outlet water temperature and changing the speed increase ratio of the horizontal axis wind turbine. This scheme is primarily suitable for wind-powered direct-drive agitation heating or eddy current heating, but not for wind-powered direct-drive heat pump heating. Furthermore, it does not consider the torque matching between the wind turbine and the required torque of the equipment; simply changing the speed increase ratio can prevent the equipment from starting. In a liquid-stirring wind power heating unit and its adaptation method (application number: 202110321076.4), a scheme is adopted that couples stirring heating with a heat pump compressor. Different stirring heating power consumption is matched according to the wind speed. By controlling the change of stirring heating power consumption, the wind energy utilization range of the vertical axis wind power heating device system is improved. It effectively expands the wind energy utilization range upward, and the equipment can operate at higher wind speeds. However, it still cannot effectively reduce the starting wind speed to expand the lower limit of its wind energy utilization range. Moreover, due to the addition of an extra stirring heating unit, the system cost will increase. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a system and adaptation method suitable for wind-powered direct-drive heat pump units, especially a wind-powered direct-drive heat pump unit system and adaptation method based on gas injection enthalpy enhancement pipeline and evaporator bypass control; which can effectively solve the problem of existing control schemes having difficulty operating at low wind speeds.

[0006] To achieve the above objectives, the present invention provides a system applicable to wind-powered direct-drive heat pump units; the system includes a temperature module, a wind speed module, a rotation speed module, a control unit, a gas injection enthalpy-increasing pipeline solenoid valve, and an evaporator bypass solenoid valve; the wind speed module, rotation speed module, and temperature module are monitoring units of the system, which collect corresponding signals and then transmit the corresponding wind speed, rotation speed, and temperature signals to the control unit; the control unit controls the wind-powered direct-drive heat pump by controlling the opening and closing of the gas injection enthalpy-increasing pipeline solenoid valve and the evaporator bypass solenoid valve.

[0007] Preferably, the speed module is installed at the front end of the compressor of the wind-driven heat pump unit to monitor the current compressor input speed of the wind-driven heat pump unit; the wind speed module is installed on the wind turbine of the wind-driven heat pump unit to monitor the real-time wind speed under the current environment; the gas replenishment enthalpy enhancement pipeline solenoid valve is controlled by the control unit, installed on the gas replenishment enthalpy enhancement pipeline, and the gas replenishment enthalpy enhancement pipeline solenoid valve is located before the gas replenishment enthalpy enhancement pipeline expansion valve in the gas replenishment enthalpy enhancement pipeline; the evaporator bypass solenoid valve is installed on the evaporator bypass, one end of the evaporator bypass is located after the evaporator outlet, and the other end of the evaporator bypass is installed before the main expansion valve.

[0008] The adaptation method for wind-powered direct-drive heat pump unit systems includes the following steps:

[0009] The control flow of the adaptation method includes temperature control, rotation speed control, and wind speed control; after the adaptation method is started, temperature, rotation speed, and wind speed control are performed in parallel until all controls are canceled by the user.

[0010] Close the gas injection enthalpy-increasing solenoid valve and the evaporator bypass solenoid valve, at the design ambient temperature T of the wind-powered direct-drive heat pump. 设计 The following records the wind-powered direct-drive heat pump to design minimum speed N. 设计最小 Wind speed V during operation 设计最小 Maximum speed N 设计最大 Wind speed V during operation 设计最大 Determine the upper limit of the temperature control target T. 上 Temperature control target lower limit T 下 ;

[0011] Based on the design minimum operating speed N of the wind-powered direct-drive heat pump 设计最小 With the design maximum operating speed N 设计最大， Determine the upper limit of the target speed control N 上 and the lower limit of the speed control target N下 Speed ​​control target upper limit N 上 Less than the maximum design operating speed N 设计最大 Speed ​​control target lower limit N 下 Greater than or equal to minimum operating speed N 设计最小 ;

[0012] Based on the design minimum operating wind speed V of the wind-driven direct-drive heat pump 设计最小 With the design maximum operating wind speed V 设计最大 Determine the upper limit of the wind speed control target V 上 and the lower limit of the speed control target V 下 Wind speed control target upper limit V 上 =V 设计最大 Wind speed control target lower limit V 下 =V 设计最小 .

[0013] Preferably, the temperature control process is as follows: the control unit reads the ambient temperature T from the temperature module. t and the set upper limit of the temperature control target T 上 Temperature control target lower limit T 下 It controls the opening and closing of the evaporator bypass solenoid valve and the gas injection enthalpy enhancement pipeline solenoid valve.

[0014] Preferably, when the ambient temperature T t Higher than the temperature control target value T 上 The evaporator bypass solenoid valve is open;

[0015] When the ambient temperature T t Below the temperature control target value T 上 The evaporator bypass solenoid valve is closed;

[0016] When the ambient temperature T t Higher than the temperature control target value T 下 The solenoid valve of the gas replenishment and enthalpy increase pipeline is closed;

[0017] When the ambient temperature T t Below the temperature control target value T 下 The solenoid valve of the gas replenishment and enthalpy enhancement pipeline is opened.

[0018] Preferably, the speed control process is as follows: the control unit reads the current compressor input speed N from the speed module. t and the set upper limit of the speed control target N 上 and the target lower limit N of rotational speed 下 Controls the opening and closing of the evaporator bypass solenoid valve and the gas injection enthalpy enhancement pipeline solenoid valve; after speed control starts, it sets the current speed N. t Read; when N t >N 上The solenoid valve speed control process of the gas replenishment and enthalpy increase pipeline is in operation. When N t Less than N 下 The evaporator bypass solenoid valve speed control process is executed continuously; after completing any process, the current speed N is re-evaluated. t The system reads the data and makes a new judgment; this process is repeated until the user cancels the speed control.

[0019] Preferably, after the process of controlling the speed of the solenoid valve in the gas replenishment and enthalpy enhancement pipeline is started, the solenoid valve opens, and then when N... t <N 下 When the time comes, close the solenoid valve of the gas replenishment and enthalpy enhancement pipeline, and end the speed control process of the solenoid valve of the gas replenishment and enthalpy enhancement pipeline.

[0020] Preferably, the wind speed control process is as follows: after wind speed control begins, the current average wind speed V is measured. t Read; Current average wind speed V t The average wind speed collected in the X seconds prior to the current moment; when V t >V 上 The process of controlling the airflow speed of the solenoid valve in the gas replenishment and enthalpy enhancement pipeline is as follows: when V t Less than V 下 The evaporator bypass solenoid valve fan speed control process is executed continuously; after completing any process, the current average fan speed V is recalculated. t The system reads the data and makes a new judgment; this process is repeated until the user cancels the wind speed control.

[0021] Preferably, after the gas replenishment enthalpy enhancement pipeline solenoid valve wind speed control process is started, the gas replenishment enthalpy enhancement solenoid valve opens, and then when V t <V 下 When the time comes, close the solenoid valve of the gas replenishment and enthalpy enhancement pipeline, and end the gas replenishment and enthalpy enhancement pipeline solenoid valve wind speed control process.

[0022] Preferably, after the evaporator bypass solenoid valve fan speed control process is initiated, the evaporator bypass solenoid valve opens, and then when V... t >V 上 When the evaporator bypass solenoid valve is closed, the evaporator bypass solenoid valve fan speed control process is terminated.

[0023] Beneficial effects:

[0024] This invention relates to a wind-powered direct-drive heat pump unit system and its adaptation method based on a gas-injection enthalpy-increasing pipeline and evaporator bypass control. It effectively reduces the rated starting wind speed of the wind-powered direct-drive heat pump unit, lowering it from 6 m / s to below 5 m / s compared to equipment without this invention. Furthermore, it effectively increases the rated operating wind speed of the wind-powered heat pump, raising it from 8 m / s to over 9 m / s compared to equipment without this solution. It also effectively increases the rated heating capacity of the wind-powered heat pump, increasing it by approximately 35% compared to equipment without this solution. Finally, it effectively improves wind energy utilization efficiency, increasing it to over 180% in low-temperature environments below -10℃. All hardware modules used in this invention are commercially available and require no custom development, reducing hardware development costs. Attached Figure Description

[0025] Figure 1 This is a topology diagram of the present invention;

[0026] Figure 2 This is a schematic diagram illustrating the principle of the present invention;

[0027] Figure 3 This is a schematic diagram showing the installation positions of the evaporator bypass solenoid valve and the gas injection enthalpy-increasing pipeline solenoid valve of the present invention.

[0028] Figure 4 This is a control flowchart of the control scheme described in this invention;

[0029] Figure 5 This is a schematic diagram of the electrical principle of the control scheme described in this invention;

[0030] Figure 6 This is a flowchart of the temperature control process in the control scheme described in this invention;

[0031] Figure 7 This is a flowchart of the speed control in the control scheme described in this invention;

[0032] Figure 8 This is a flowchart of the speed control of the solenoid valve in the gas replenishment and enthalpy enhancement pipeline described in this invention.

[0033] Figure 9 This is a flowchart of the evaporator bypass solenoid valve speed control according to the present invention;

[0034] Figure 10 This is a flowchart of the wind speed control scheme described in this invention;

[0035] Figure 11 This is a flowchart of the air velocity control process for the solenoid valve in the gas replenishment and enthalpy enhancement pipeline of the present invention.

[0036] Figure 12This is a flowchart of the evaporator bypass solenoid valve wind speed control process of the present invention.

[0037] In the diagram, 1-control unit, 2-temperature module, 3-speed module, 4-fan speed module, 5-compressor, 6-evaporator, 7-evaporator bypass solenoid valve, 8-main expansion valve, 9-evaporator bypass, 10-intermediate heat exchanger, 11-gas injection enthalpy increase pipeline expansion valve, 12-gas injection enthalpy increase pipeline solenoid valve, 13-condenser. Detailed Implementation

[0038] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0039] As shown in the figure Figure 1 The topology diagram of the adaptation method is shown. The wind speed module (4), speed module (3), and temperature module (2) are the monitoring units of the system. They collect the corresponding signals and transmit the corresponding wind speed, speed, and temperature signals to the control unit (1). The control unit controls the wind-powered direct-drive heat pump by controlling the opening and closing of the gas replenishment enthalpy pipeline solenoid valve (12) and the evaporator bypass solenoid valve (7).

[0040] Figure 2 This is a schematic diagram of the adaptation method. The control unit (1) is connected to the temperature module (2), speed module (3), wind speed module (4), evaporator bypass solenoid valve (7), and gas injection enthalpy enhancement pipeline solenoid valve (12). The evaporator bypass solenoid valve (7) is installed on the bypass of the evaporator (6); the gas injection enthalpy enhancement pipeline solenoid valve (12) is connected to the intermediate heat exchanger (10) and the condenser (13) respectively.

[0041] The temperature module (2) is placed outdoors to monitor the current ambient temperature. The speed module (3) is installed at the front end of the input shaft of the compressor (5) of the wind-driven direct-drive heat pump unit to monitor the current compressor input speed of the wind-driven direct-drive heat pump unit. The wind speed module (4) is installed on the wind turbine of the wind-driven direct-drive heat pump unit to monitor the real-time wind speed under the current environment. The control unit (1) is an integrated module, or a general term for multiple modules, that can collect wind speed, speed, temperature and control the solenoid valve (12) of the gas injection enthalpy enhancement pipeline and the solenoid valve (7) of the evaporator bypass.

[0042] Figure 3 This is a schematic diagram showing the installation positions of the evaporator bypass solenoid valve (7) and the gas replenishment enthalpy enhancement pipeline solenoid valve (12) in the adapted method. The A end of the evaporator bypass (9) is located after the evaporator outlet. The B end of the evaporator bypass (9) is located before the main pipeline expansion valve (8). The pipe diameter of the evaporator bypass (9) in section AB is selected as a common specification model that is closest to 0.25 times the main pipeline diameter in section BC. The evaporator bypass solenoid valve (7) is located on the evaporator bypass (9). The gas replenishment enthalpy enhancement solenoid valve (12) is located before the gas replenishment enthalpy enhancement pipeline expansion valve (11) in the gas replenishment enthalpy enhancement pipeline.

[0043] A method for adapting wind-powered direct-drive heat pump units based on gas injection enthalpy enhancement pipeline and evaporator bypass control includes the following steps:

[0044] Close the gas injection enthalpy-increasing solenoid valve (12) and the evaporator bypass solenoid valve (7), at the design ambient temperature T of the wind-powered direct-drive heat pump. 设计 The following records the wind-powered direct-drive heat pump to design minimum speed N. 设计最小 The wind speed during operation is denoted as V. 设计最小 .

[0045] Close the gas injection enthalpy-increasing solenoid valve (12) and the evaporator bypass solenoid valve (7), at the design ambient temperature T of the wind-powered direct-drive heat pump. 设计 Record the wind-powered direct-drive heat pump to its designed maximum speed N 设计最大 The wind speed during operation is denoted as V. 设计最大 .

[0046] Based on the design operating ambient temperature T of the wind-powered direct-drive heat pump 设计 Determine the upper limit of the temperature control target T 上 Temperature control target lower limit T 下 Generally, T is taken. 上 =20℃, T 下 =-5℃.

[0047] Based on the design minimum operating speed N of the wind-powered direct-drive heat pump 设计最小 With the design maximum operating speed N 设计最大 Determine the upper limit of the target speed control N 上 Speed ​​control target lower limit N 下 Speed ​​control target upper limit N 上 Less than the maximum design operating speed N 设计最大 N is generally taken as N 上 =0.65N 设计最大 Speed ​​control target lower limit N 下 Greater than or equal to minimum operating speed N 设计最小 N is generally taken as N 下 =0.65N 设计最小 .

[0048] Based on the design minimum operating wind speed V of the wind-driven direct-drive heat pump 设计最小 With the design maximum operating wind speed V 设计最大 Determine the upper limit of the wind speed control target V 上 Speed ​​control target lower limit V 下 Wind speed control target upper limit V 上 =V 设计最大 Wind speed control target lower limit V 下 =V 设计最小 .

[0049] Figure 4 This is the control flowchart for the adaptation method. The control flow is divided into temperature control, speed control, and fan speed control. After this control method is started, temperature, speed, and fan speed control are performed in parallel until all controls are canceled by the user.

[0050] Figure 5 This is a schematic diagram of the electrical principle of the adapted solution. Evaporator bypass temperature control (S1), evaporator bypass speed control (S2), and evaporator bypass fan speed control (S3) – closing any one of these switches will open the evaporator bypass solenoid valve YV1. Injection gas enthalpy enhancement pipeline temperature control (S4), injection gas enthalpy enhancement pipeline speed control (S5), and injection gas enthalpy enhancement pipeline fan speed control (S6) – closing any one of these switches will open the injection gas enthalpy enhancement pipeline solenoid valve YV2. YV1 and YV2 cannot be opened simultaneously.

[0051] Figure 6 This is a flowchart of temperature control in the adaptation scheme. The control unit (1) reads the ambient temperature T from the temperature module (2). t and the set upper limit of the temperature control target T 上 Temperature control target lower limit T 下 Control the opening and closing of the evaporator bypass solenoid valve (7) and the gas replenishment and enthalpy increase pipeline solenoid valve (12);

[0052] When the ambient temperature T t Higher than the temperature control target value T 上 The evaporator bypass solenoid valve (7) is opened;

[0053] When the ambient temperature T t Below the temperature control target value T 上 The evaporator bypass solenoid valve (7) is closed;

[0054] When the ambient temperature T t Higher than the temperature control target value T 下 The solenoid valve (12) of the gas replenishment and enthalpy enhancement pipeline is closed;

[0055] When the ambient temperature T t Below the temperature control target value T 下 The solenoid valve (12) of the gas replenishment and enthalpy increase pipeline is opened.

[0056] Figure 7 This is a flowchart of the speed control in the adaptation scheme. The control unit (1) reads the current compressor input speed N from the speed module (3). t and the set upper limit of the speed control target N 上 Target lower limit N of rotational speed 下 Control the opening and closing of the evaporator bypass solenoid valve (7) and the gas injection enthalpy enhancement pipeline solenoid valve (12); after the speed control starts, set the current speed N. t Read. When Nt >N 上 The solenoid valve speed control process of the gas replenishment and enthalpy increase pipeline is in operation. When N t Less than N 下 The evaporator bypass solenoid valve speed control process is executed continuously. After completing any process, the current speed N is re-evaluated. t The system reads the data and performs a new round of judgment. This process repeats until the user cancels the speed control.

[0057] Figure 8 This is a flowchart of the speed control of the solenoid valve in the gas replenishment and enthalpy enhancement pipeline. After this process is started, the gas replenishment and enthalpy enhancement solenoid valve (12) opens, and then when N... t <N 下 When the gas replenishment and enthalpy enhancement pipeline solenoid valve (12) is closed, the gas replenishment and enthalpy enhancement pipeline solenoid valve speed control process is ended.

[0058] Figure 9 This is the flow chart for the evaporator bypass solenoid valve speed control. After this process starts, the evaporator bypass solenoid valve (7) opens, and then when N... t >N 上 When the evaporator bypass solenoid valve (7) is closed, the evaporator bypass solenoid valve speed control process is terminated.

[0059] Figure 10 This is the wind speed control flowchart in the adaptation scheme. After wind speed control begins, the current average wind speed V is measured. t Reading. Current average wind speed V t This represents the average wind speed collected over the previous X seconds. When V t >V 上 The process of controlling the airflow speed of the solenoid valve in the gas replenishment and enthalpy enhancement pipeline is as follows: when V t Less than V 下 The evaporator bypass solenoid valve fan speed control process is executed continuously. After completing any process, the current average fan speed V is recalculated. t The system reads the data and performs a new round of judgment. This process is repeated until the user cancels the fan speed control.

[0060] Figure 11 This is the flow chart for the air velocity control of the solenoid valve in the gas replenishment and enthalpy enhancement pipeline. After this process is started, the gas replenishment and enthalpy enhancement solenoid valve (12) opens, and then when V t <V 下 When the gas replenishment and enthalpy enhancement pipeline solenoid valve (12) is closed, the gas replenishment and enthalpy enhancement pipeline solenoid valve wind speed control process is ended.

[0061] Figure 12 This is the flow chart for the evaporator bypass solenoid valve fan speed control. After this process is started, the evaporator bypass solenoid valve (7) opens, and then when V t >V 上When the evaporator bypass solenoid valve (7) is closed, the evaporator bypass solenoid valve wind speed control process is terminated.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. The present invention has been described in detail with reference to preferred embodiments. Those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A system suitable for wind-powered direct-drive heat pump units; characterized in that: The system includes a temperature module, a wind speed module, a rotation speed module, a control unit, a gas injection enthalpy enhancement pipeline solenoid valve, and an evaporator bypass solenoid valve. The wind speed module, rotation speed module, and temperature module are the system's monitoring units. The monitoring units collect relevant signals and then transmit the corresponding wind speed, rotation speed, and temperature signals to the control unit. The control unit controls the wind-powered direct-drive heat pump by controlling the opening and closing of the gas injection enthalpy enhancement pipeline solenoid valve and the evaporator bypass solenoid valve. The system adaptation method is as follows: After the process of controlling the speed of the solenoid valve in the gas replenishment and enthalpy enhancement pipeline is started, the solenoid valve opens, and then when N... t <N 下 When the time comes, close the solenoid valve of the gas replenishment and enthalpy enhancement pipeline and end the speed control process of the solenoid valve of the gas replenishment and enthalpy enhancement pipeline. The wind speed control process is as follows: After wind speed control begins, the current average wind speed V is calculated. t Read; Current average wind speed V t The average wind speed collected in the X seconds prior to the current moment; when V t >V 上 The process of controlling the airflow speed of the solenoid valve in the gas replenishment and enthalpy enhancement pipeline is as follows: when V t Less than V 下 The evaporator bypass solenoid valve fan speed control process is executed continuously; after completing any process, the current average fan speed V is recalculated. t The system reads the data and performs a new round of judgment; this process is repeated until the user cancels the wind speed control. After the gas replenishment enthalpy enhancement pipeline solenoid valve wind speed control process is initiated, the gas replenishment enthalpy enhancement solenoid valve opens, and then when V t <V 下 When the time comes, close the solenoid valve of the gas replenishment and enthalpy enhancement pipeline, and end the gas replenishment and enthalpy enhancement pipeline solenoid valve wind speed control process.

2. The system applicable to wind-powered direct-drive heat pump units according to claim 1; characterized in that: The speed module is installed at the front end of the compressor of the wind-driven heat pump unit to monitor the current compressor input speed of the wind-driven heat pump unit; the wind speed module is installed on the wind turbine of the wind-driven heat pump unit to monitor the real-time wind speed under the current environment; the gas replenishment enthalpy enhancement pipeline solenoid valve is controlled by the control unit, installed on the gas replenishment enthalpy enhancement pipeline, and the gas replenishment enthalpy enhancement pipeline solenoid valve is located before the gas replenishment enthalpy enhancement pipeline expansion valve; the evaporator bypass solenoid valve is installed on the evaporator bypass, one end of the evaporator bypass is located after the evaporator outlet, and the other end of the evaporator bypass is installed before the main expansion valve.

3. The adaptation method for a system suitable for wind-driven direct-drive heat pump units according to claim 1 or 2, characterized in that: It also includes the following steps: The control flow of the adaptation method includes temperature control, speed control, and fan speed control; after the adaptation method is started, temperature, speed, and fan speed control are performed in parallel until all controls are canceled by the user. Close the gas injection enthalpy-increasing solenoid valve and the evaporator bypass solenoid valve, at the design ambient temperature T of the wind-powered direct-drive heat pump. 设计 The following records the wind-powered direct-drive heat pump to design minimum speed N. 设计最小 Wind speed V during operation 设计最小 Maximum speed N 设计最大 Wind speed V during operation 设计最大 Determine the upper limit of the temperature control target T. 上 Temperature control target lower limit T 下 ; Based on the design minimum operating speed N of the wind-powered direct-drive heat pump 设计最小 With the design maximum operating speed N 设计最大， Determine the upper limit of the target speed control N 上 and the lower limit of the speed control target N 下 ; Speed ​​control target upper limit N 上 Less than the maximum design operating speed N 设计最大 ; Speed ​​control target lower limit N 下 Greater than or equal to minimum operating speed N 设计最小 ; Based on the design minimum operating wind speed V of the wind-driven direct-drive heat pump 设计最小 With the design maximum operating wind speed V 设计最大 Determine the upper limit of the wind speed control target V 上 and the lower limit of the speed control target V 下 Wind speed control target upper limit V 上 =V 设计最大 Wind speed control target lower limit V 下 =V 设计最小 .

4. The adaptation method according to claim 3, characterized in that: The temperature control process is as follows: The control unit reads the ambient temperature T from the temperature module. t and the set upper limit of the temperature control target T 上 Temperature control target lower limit T 下 It controls the opening and closing of the evaporator bypass solenoid valve and the gas injection enthalpy enhancement pipeline solenoid valve.

5. The adaptation method according to claim 4, characterized in that: When the ambient temperature T t Higher than the temperature control target value T 上 The evaporator bypass solenoid valve opens; when the ambient temperature T t Below the temperature control target value T 上 The evaporator bypass solenoid valve is closed; when the ambient temperature T t Higher than the temperature control target value T 下 The solenoid valve of the gas replenishment and enthalpy increase pipeline is closed; when the ambient temperature T t Below the temperature control target value T 下 The solenoid valve of the gas replenishment and enthalpy enhancement pipeline is opened.

6. The adaptation method according to claim 3, characterized in that: The speed control process is as follows: The control unit reads the current compressor input speed N from the speed module. t and the set upper limit of the speed control target N 上 and the target lower limit N of the rotational speed 下 Controls the opening and closing of the evaporator bypass solenoid valve and the gas injection enthalpy enhancement pipeline solenoid valve; after speed control starts, it sets the current speed N. t Read; when N t >N 上 The solenoid valve speed control process of the gas replenishment and enthalpy increase pipeline is in operation. When N t Less than N 下 The evaporator bypass solenoid valve speed control process is executed continuously; after completing any process, the current speed N is re-evaluated. t The system reads the data and makes a new judgment; this process is repeated until the user cancels the speed control.

7. The adaptation method according to claim 6, characterized in that: After the evaporator bypass solenoid valve fan speed control process is initiated, the evaporator bypass solenoid valve opens, and then when V... t >V 上 When the evaporator bypass solenoid valve is closed, the evaporator bypass solenoid valve fan speed control process is terminated.

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