Control methods for environmental control equipment, environmental control equipment, and storage media

Abstract

This invention discloses a control method for an environmental conditioning device, the environmental conditioning device itself, and a storage medium. The environmental conditioning device includes an air duct and a heat pump system. The heat pump system includes a compressor and a heat exchanger disposed within the air duct. The method includes: controlling the compressor to start and acquiring first coil temperature data and first air inlet temperature data of the heat exchanger; when the first temperature data and the first coil temperature data reach a first preset condition indicating a risk of refrigerant shortage in the heat pump system, controlling the compressor to shut down. This invention aims to reduce the risk of compressor damage due to refrigerant shortage in environmental conditioning devices and improve the reliability of heat pump system operation.

Description

Technical Field

[0001] This invention relates to the field of environmental equipment technology, and more particularly to control methods, environmental conditioning equipment, and storage media for environmental conditioning equipment. Background Technology

[0002] Most environmental control equipment (such as air conditioners and dehumidifiers) are equipped with heat pump systems. These systems regulate air temperature and humidity through refrigerant circulation before delivering the air into the indoor environment.

[0003] However, the installation of environmental control equipment is easily affected by the skill level of the technicians, resulting in issues such as refrigerant evacuation, leakage at the flared ends of connecting pipes, and valves not opening properly. These issues can cause refrigerant shortage during the operation of the heat pump system, leading to compressor damage due to overheating and wear. Summary of the Invention

[0004] The main objective of this invention is to provide a control method, an environmental conditioning device, and a storage medium for an environmental conditioning device, aiming to reduce the risk of compressor damage due to refrigerant shortage in the environmental conditioning device and improve the reliability of the heat pump system.

[0005] To achieve the above objectives, the present invention provides a control method for an environmental conditioning device, the environmental conditioning device including an air duct and a heat pump system, the heat pump system including a compressor and a heat exchanger disposed in the air duct, and the control method for the environmental conditioning device including the following steps:

[0006] The compressor is controlled to start, and the first coil temperature data of the heat exchanger and the first air inlet temperature data of the heat exchanger are acquired.

[0007] When the first temperature data and the first coil temperature data reach the first preset condition that the heat pump system is at risk of refrigerant shortage, the compressor is controlled to shut down.

[0008] Optionally, the environmental control device includes at least two heat pump systems, each heat pump system including at least one heat exchanger disposed in the air duct, and at least two heat exchangers are arranged sequentially along the airflow direction in the air duct. The step of controlling the compressor to start and acquiring the first temperature data of the air inlet side of the heat exchanger and the coil temperature of the heat exchanger includes:

[0009] Control each compressor to start, and acquire the first coil temperature data of each heat exchanger and the first air inlet temperature data of each heat exchanger;

[0010] The step of controlling the compressor to shut down when the first temperature data and the first coil temperature data reach a first preset condition indicating a risk of refrigerant shortage in the heat pump system includes:

[0011] When the first temperature data and the first coil temperature data reach the first preset condition that the heat pump system is at risk of refrigerant shortage, the corresponding compressor is controlled to shut down.

[0012] Optionally, a corresponding temperature sensor is provided on the air inlet side of each heat exchanger, and the step of acquiring the first temperature data of the air inlet side of each heat exchanger includes:

[0013] The data detected by the temperature sensor corresponding to each heat exchanger is obtained to obtain the first temperature data corresponding to each heat exchanger.

[0014] Optionally, two adjacent heat exchangers arranged sequentially along the airflow direction are defined as the first heat exchanger and the second heat exchanger, and the step of obtaining the first temperature data of the air inlet side of the second heat exchanger includes:

[0015] The first temperature data corresponding to the second heat exchanger is determined based on the first coil temperature data corresponding to the first heat exchanger.

[0016] Optionally, the first compressor is defined as the compressor in the heat pump system where the first heat exchanger is located, and the step of determining the first temperature data corresponding to the second heat exchanger based on the first coil temperature data corresponding to the first heat exchanger includes:

[0017] The temperature correction value is determined based on the air volume of the air duct, the operating frequency of the first compressor, and the temperature data of the first coil corresponding to the first heat exchanger.

[0018] Increase the temperature data of the first coil corresponding to the first heat exchanger according to the temperature correction value to obtain the first temperature data corresponding to the second heat exchanger.

[0019] Optionally, the temperature correction value is negatively correlated with the air volume, positively correlated with the operating frequency, and negatively correlated with the temperature data of the first coil.

[0020] Optionally, the first preset condition includes a first sub-condition or a second sub-condition, and the step of controlling the compressor to shut down when the first temperature data and the first coil temperature data reach the first preset condition that the heat pump system has a risk of refrigerant shortage includes:

[0021] When the first temperature data and the first coil temperature data reach the first sub-condition, control the compressor to shut down; or,

[0022] When the first temperature data and the first coil temperature data reach the second sub-condition, the compressor is controlled to shut down;

[0023] The first sub-condition includes that the temperature difference between the heat exchanger coil and the corresponding air inlet side is less than a preset temperature difference value, and the temperature change between the heat exchanger coil and the corresponding air inlet side is less than a preset temperature change value. The second sub-condition includes that the temperature difference between the heat exchanger coil and the corresponding air inlet side is less than a preset temperature difference value, and the temperature change of the heat exchanger coil is greater than or equal to a preset temperature change value.

[0024] Optionally, after the step of acquiring the first coil temperature data of the heat exchanger and the first air inlet temperature data of the heat exchanger, the method further includes:

[0025] When the compressor's operating time is less than the first preset time, the step of controlling the compressor to shut down when the first temperature data and the first coil temperature data reach the first sub-condition is executed.

[0026] When the compressor's operating time is greater than or equal to the second preset time, the step of controlling the compressor to shut down when the first temperature data and the first coil temperature data reach the second sub-condition is executed.

[0027] Wherein, the second preset duration is greater than or equal to the first preset duration.

[0028] Optionally, before the step of controlling the compressor to shut down when the first temperature data and the first coil temperature data reach the first sub-condition, the method further includes:

[0029] When the compressor's operating time is less than the third preset time, the first preset temperature difference change value is determined to be the preset temperature difference change value;

[0030] When the compressor's operating time is greater than or equal to the third preset time and less than the first preset time, the second preset temperature difference change value is determined to be the preset temperature difference change value.

[0031] Wherein, the first preset temperature difference change value is less than the second preset temperature difference change value.

[0032] Optionally, the first coil temperature data includes at least two first sub-temperatures detected within a first time period and at least two second sub-temperatures detected within a second time period. The compressor's operating time within the first time period is less than the second preset time period, and the compressor's operating time within the second time period is greater than or equal to the second preset time period. After the step of obtaining the first coil temperature data of the heat exchanger and the first temperature data of the air inlet side of the heat exchanger, the method further includes:

[0033] When the compressor's operating time is greater than or equal to the second preset time, the minimum temperature value among the at least two first sub-temperatures is determined, and the maximum temperature value among the at least two second sub-temperatures is determined.

[0034] The temperature change value is determined based on the difference between the maximum temperature value and the minimum temperature value.

[0035] Optionally, after the step of controlling the compressor to shut down when the first temperature data and the first coil temperature data reach a first preset condition indicating a risk of refrigerant shortage in the heat pump system, the method further includes:

[0036] Acquire the compressor's shutdown duration, the second temperature data of the air inlet side of the heat exchanger, and the second coil temperature data of the heat exchanger;

[0037] When the shutdown duration is greater than or equal to the fourth preset duration, and / or when the second temperature data and the second coil temperature data reach the second preset condition that the heat pump system has no risk of refrigerant shortage, the compressor is controlled to start.

[0038] Optionally, the second preset condition includes the number of times the first sub-condition or the second sub-condition is met during the compressor shutdown process being less than or equal to a preset threshold. The first sub-condition includes the temperature difference between the heat exchanger coil and the corresponding air inlet side being less than a preset temperature difference value, and the temperature change value between the heat exchanger coil and the corresponding air inlet side being less than a preset temperature change value. The second sub-condition includes the temperature difference between the heat exchanger coil and the corresponding air inlet side being less than a preset temperature difference value, and the temperature change value of the heat exchanger coil being greater than or equal to a preset temperature change value.

[0039] Furthermore, in order to achieve the above objectives, this application also proposes an environmental control device, the environmental control device comprising:

[0040] Air duct;

[0041] A heat pump system, comprising a compressor and a heat exchanger located within the air duct,

[0042] A control device, wherein the heat pump system is connected to the control device, the control device comprising: a memory, a processor, and a control program for an environmental conditioning device stored in the memory and executable on the processor, wherein the control program for the environmental conditioning device, when executed by the processor, implements the steps of the control method for the environmental conditioning device as described in any of the preceding claims.

[0043] Optionally, the environmental control device includes at least two heat pump systems, and the heat exchangers in the at least two heat pump systems are arranged sequentially along the airflow direction in the duct.

[0044] In addition, to achieve the above objectives, this application also proposes a storage medium storing a control program for an environmental control device, wherein the control program for the environmental control device, when executed by a processor, implements the steps of the control method for the environmental control device as described in any of the preceding claims.

[0045] This invention proposes a control method for an environmental conditioning device. Based on an environmental conditioning device with a heat pump system for air heat exchange within an air duct, during compressor startup, the method detects the temperature data of the first coil of the heat exchanger and the first temperature data of the air inlet side of the heat exchanger. When the first coil temperature data and the first temperature data meet a first preset condition indicating a refrigerant shortage risk in the heat pump system, the compressor is shut down. The first coil temperature data accurately reflects the heat exchange output of the heat exchanger during compressor startup, and the first temperature data accurately reflects the operating condition of the heat exchanger within the air duct during compressor startup. Combining the first coil temperature data and the first temperature data accurately characterizes the refrigerant shortage risk in the heat pump system. By promptly shutting down the compressor when a refrigerant shortage risk exists, the method ensures that the compressor will not overheat or wear due to refrigerant shortage, reducing the risk of compressor damage due to refrigerant shortage in the environmental conditioning device and effectively improving the reliability of the heat pump system. Attached Figure Description

[0046] Figure 1 This is a schematic diagram of the structure of an embodiment of the environmental control device of the present invention;

[0047] Figure 2 This is a schematic diagram of another embodiment of the environmental control device of the present invention;

[0048] Figure 3 This is a schematic diagram of another embodiment of the environmental control device of the present invention;

[0049] Figure 4 This is a schematic diagram of the hardware structure involved in the operation of an embodiment of the environmental control device of the present invention;

[0050] Figure 5 This is a flowchart illustrating an embodiment of the control method for the environmental conditioning equipment of the present invention;

[0051] Figure 6 This is a schematic flowchart of another embodiment of the control method for the environmental conditioning equipment of the present invention;

[0052] Figure 7 This is a flowchart illustrating another embodiment of the control method for the environmental conditioning equipment of the present invention;

[0053] Figure 8 This is a flowchart illustrating another embodiment of the control method for the environmental conditioning equipment of the present invention.

[0054] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0055] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0056] This invention provides an environmental control device. The environmental control device is used to regulate the indoor environment. In this embodiment, the environmental control device is a fresh air system. In other embodiments, the environmental control device may also be other types of devices used to regulate the indoor environment, such as dehumidifiers, air conditioners, etc.

[0057] In this embodiment of the invention, reference is made to Figures 1 to 3 The environmental control equipment includes an air duct 01, a heat pump system, and a control device 1. The heat pump system includes a compressor 21, a heat exchanger 22, and a throttling device 23, all connected via refrigerant piping. The heat pump system is connected to the control device 1.

[0058] The heat exchanger 22 is located inside the air duct 01 and can exchange heat with the air flowing through the air duct 01. Specifically, the environmental control equipment may also include a fan 5 inside the air duct 01. Driven by the fan 5, air enters the air duct 01, exchanges heat with the heat exchanger 22, and is then sent into the indoor environment.

[0059] In this embodiment, the air inlet of the air duct 01 is connected to the outdoor environment, and fresh air from the outdoor environment can enter the air duct 01, exchange heat with the heat exchanger 22, and then be sent into the duct. In other embodiments, the air inlet of the air duct 01 may also be connected to the indoor environment or simultaneously to both the indoor and outdoor environments.

[0060] In this embodiment, the throttling device 23 is an electronic expansion valve. In other embodiments, the throttling device 23 may also be a capillary tube, valve core, or other throttling component.

[0061] The number of heat exchangers 22 in the heat pump system can be more than one, the number of heat exchangers 22 installed in the air duct 01 can be more than one, the heat exchange state of different heat exchangers 22 in the air duct 01 can be the same (such as all being in the evaporation state or the condensation state), and the number of different heat exchangers 22 in the air duct 01 can also be different (for example, some heat exchangers 22 are in the evaporation state, and other heat exchangers 22 are in the condensation state).

[0062] Heat pump systems can be systems with cooling-only or heating-only functions, or systems that allow switching between cooling and heating functions.

[0063] In this embodiment, the environmental control equipment can be divided into different operating modes according to different indoor environmental control needs, such as heating mode, cooling mode, dehumidification mode, humidification mode, and air supply mode. In heating mode, the compressor 21 in the heat pump system is turned on. The refrigerant discharged from the compressor 21 circulates in the refrigerant pipeline and then returns to the compressor 21. When flowing through the heat exchanger 22 in the air duct 01, it releases heat into the air, raising the air temperature, and then the heated air is sent into the room. In cooling mode, the compressor 21 in the heat pump system is turned on. The refrigerant discharged from the compressor 21 circulates in the refrigerant pipeline and then returns to the compressor 21. When flowing through the heat exchanger 22 in the air duct 01, it releases cooling energy into the air, lowering the air temperature, and then the cooled air is sent into the room. In dehumidification mode, compressor 21 in the heat pump system is turned on. The refrigerant discharged from compressor 21 circulates in the refrigerant pipeline and then flows back to compressor 21. All or part of the heat exchangers 22 in the air duct 01 are in an evaporating state. Moisture in the air flowing through the air duct 01 condenses on the evaporating heat exchangers 22, reducing the air humidity. After the humidity is reduced, the air is sent into the room. When some heat exchangers 22 are in a condensing state, they can heat the dehumidified air before sending it into the room, achieving reheat dehumidification. In humidification and air supply modes, compressor 21 of the heat pump system can be turned off.

[0064] Furthermore, in this embodiment, the environmental control device is a split device, specifically including an indoor unit and an outdoor unit. The air duct 01 is located in the indoor unit, and the compressor 21 of the heat pump system is located in the outdoor unit. In other embodiments, the environmental control device may also be an integrated device, and the heat pump system may be installed entirely within the indoor environment.

[0065] Furthermore, in one embodiment, referring to Figure 2 and Figure 3The environmental control equipment includes more than one of the aforementioned heat pump systems, all of which are connected to the control device 1. Each heat pump system includes at least one heat exchanger disposed within the air duct, and at least two heat exchangers are arranged sequentially along the airflow direction within the air duct. During operation of the environmental control equipment, more than one heat pump system can be activated simultaneously, and the heat exchange status of the heat exchangers 22 of different heat pump systems disposed within the air duct 01 can be the same or different based on the heat exchange requirements of the indoor environment corresponding to the current operating mode.

[0066] Furthermore, in one embodiment, referring to Figure 3The environmental control equipment includes a housing and a first heat pump system. The housing contains an air supply duct 01. The first heat pump system includes a fresh air heat exchanger structure and a first switching device. The fresh air heat exchanger structure is located within the air supply duct 01 and has a refrigerant pipeline. The first switching device is connected to the fresh air heat exchanger structure and is used to switch the flow direction of the refrigerant within the fresh air heat exchanger structure. In different operating modes, the refrigerant of the first heat pump system first passes through the refrigerant pipeline located downstream of the air supply duct 01, and then through the refrigerant pipeline located upstream of the air supply duct 01. The air supply duct 01 refers to the channel through which the environmental control equipment delivers outdoor fresh air into the room, and the exhaust duct 02 refers to the channel through which the environmental control equipment exhausts indoor air to the outside. The fresh air heat exchanger is located in the first refrigerant flow path. The first heat pump system further includes a first compressor 11, a first heat exchange module 12, and a reversing device 101. The first compressor 11 is located in the first refrigerant flow path and has a first exhaust port and a first return port. The first heat exchange module 12 is located in the first refrigerant flow path and is connected to the first switching device. The first heat exchange module 12 includes a first outdoor heat exchanger 35 and a heat recovery heat exchanger 36 arranged in series. The heat recovery heat exchanger 36 is located inside the exhaust duct 02. The first outdoor heat exchanger 35 is located outside the housing (main unit housing). The first compressor 11 is installed inside the exhaust duct 02 or... The heat recovery heat exchanger 36 is installed outside the housing (main unit housing) and is arranged as follows: the air in the exhaust duct 02 exchanges heat with the heat recovery heat exchanger 36 before being discharged from the exhaust duct 02, thereby enabling heat recovery of the air discharged from the exhaust duct 02; the reversing device 101 connects the first exhaust port, the first return port, the first heat exchange module 12 and the first switching device. The reversing device 101 is used to switch the refrigerant flow direction so that the refrigerant passes through the first heat exchange module 12 first and then through the first switching device, or so that the refrigerant passes through the first switching device first and then through the first heat exchange module 12. To achieve the reheat dehumidification function of the environmental control equipment, the fresh air heat exchanger structure includes a first fresh air heat exchanger 13 and a second fresh air heat exchanger 14 connected in series. The first fresh air heat exchanger 13 is located downstream of the air supply duct 01 relative to the second fresh air heat exchanger 14. The outlet 34 is connected to the first fresh air heat exchanger 13, and the inlet 33 is connected to the second fresh air heat exchanger 14. With this configuration, in the reheat dehumidification mode, the first fresh air heat exchanger 13 acts as an evaporator to cool the air, and the second fresh air heat exchanger 14 acts as a condenser to heat the air, thereby achieving reheat dehumidification of the air.To reduce the number of control components in the environmental control equipment and improve its stability, the first switching device has a first connecting port 31, a second connecting port 32, an inlet 33, and an outlet 34. The fresh air heat exchanger structure connects the outlet 34 and the inlet 33. The first switching device includes a first one-way valve 103, a second one-way valve 104, a third one-way valve 105, and a fourth one-way valve 106. The first one-way valve 103 is connected between the first connecting port 31 and the inlet 33, and is open in the direction from the inlet 33 to the first connecting port 31. The second one-way valve 104 is connected between the first connecting port 31 and the outlet 34. Between outlets 34, the second one-way valve 104 is open in the direction from the first connecting port 31 to the outlet 34; the third one-way valve 105 is connected between the inlet 33 and the second connecting port 32, and is open in the direction from the inlet 33 to the second connecting port 32; the fourth one-way valve 106 is connected between the outlet 34 and the second connecting port 32, and is open in the direction from the second connecting port 32 to the outlet 34. With this configuration, the first switching device is composed entirely of one-way valves. Compared with the four-way valve or two three-way valves, no control elements are required, and the stability of the environmental control device is higher.

[0067] The fresh air heat exchanger structure includes a first fresh air heat exchanger 13 and a second fresh air heat exchanger 14 connected in series. The first fresh air heat exchanger 13 is located downstream of the air supply duct 01 relative to the second fresh air heat exchanger 14. The outlet 34 is connected to the first fresh air heat exchanger 13, and the inlet 33 is connected to the second fresh air heat exchanger 14. With this configuration, in the reheat dehumidification mode, the first fresh air heat exchanger 13 acts as an evaporator to cool the air, and the second fresh air heat exchanger 14 acts as a condenser to heat the air, thereby achieving reheat dehumidification of the air.

[0068] The first heat pump system further includes a first throttling element 15 disposed on the first refrigerant flow path, the first throttling element 15 being located between the first heat exchange module 12 and the first switching device. The first heat pump system further includes a second throttling element 16 disposed in the flow path connected in series between the first fresh air heat exchanger 13 and the second fresh air heat exchanger 14, thereby enabling throttling of the refrigerant flowing out of the first fresh air heat exchanger 13.

[0069] When the fresh air unit is operating in heating mode, the heat exchanger installed in the air supply duct 01 condenses and releases heat. Specifically, when the fresh air unit includes the first heat pump system, the refrigerant discharged from the first compressor 11 passes sequentially through the reversing device 101, the fourth one-way valve 106, the first fresh air heat exchanger 13, the second throttling element 16, the second fresh air heat exchanger 14, the first one-way valve 103, the first throttling element 15, the heat recovery heat exchanger 36, the first outdoor heat exchanger 35, and the reversing device 101 before returning to the first compressor 11. At this time, the second throttling element 16 is fully open, the first throttling element 15 acts as a throttling and pressure reduction device, the first fresh air heat exchanger 13 and the second fresh air heat exchanger 14 condense and release heat, and the heat recovery heat exchanger 36 and the first outdoor heat exchanger 35 evaporate and absorb heat.

[0070] Furthermore, the environmental control equipment also includes a second heat pump system, on which a second refrigerant flow path is formed. The second heat pump system includes a second outdoor heat exchanger 201, a second compressor 27, a third fresh air heat exchanger 202, and a fourth fresh air heat exchanger 203 disposed in the second refrigerant flow path. The third fresh air heat exchanger 202 and the fourth fresh air heat exchanger 203 are both disposed within the air supply duct 01. In this case, the second outdoor heat exchanger 201 and the second compressor 27 can also be disposed within the exhaust duct 02, thereby eliminating the need for an outdoor unit and saving space.

[0071] The second heat pump system further includes a second switching device for switching the connection of the second outdoor heat exchanger 201 to the third fresh air heat exchanger 202 or simultaneously to both the third fresh air heat exchanger 202 and the fourth fresh air heat exchanger 203. The second switching device includes a fourth throttling element 24 and a fifth one-way valve 25 (the fifth one-way valve 25 can be replaced by a solenoid valve). The fourth throttling element 24 is located in the second refrigerant flow path and is situated between the third fresh air heat exchanger 202 and the fourth fresh air heat exchanger 203. The fifth one-way valve 25 is connected in parallel with the third fresh air heat exchanger 202 and the fourth throttling element 24, and the conduction direction of the fifth one-way valve 25 is from the fourth fresh air heat exchanger 203 to the second outdoor heat exchanger 201.

[0072] When the fresh air unit is operating in heating mode, the heat exchanger installed in the air supply duct 01 condenses and releases heat. When the fresh air unit includes a second heat pump system, the refrigerant discharged from the second compressor 27 passes sequentially through the reversing device 101, the fourth fresh air heat exchanger 203, the fifth one-way valve 25, the fifth throttling element 26, the second outdoor heat exchanger 201, and the reversing device 101 before returning to the second compressor 27. At this time, the fourth throttling element 24 is closed, the fifth throttling element 26 acts as a throttling and pressure reduction device, the third fresh air heat exchanger 202 condenses and releases heat, and the second outdoor heat exchanger 201 evaporates and absorbs heat. The refrigerant does not pass through the fourth throttling element 24 and the third fresh air heat exchanger 202.

[0073] This configuration, with two heat exchange systems and two evaporators within the air supply duct, results in two evaporation temperatures. The upstream evaporator has a higher temperature than the downstream one, enabling two-stage evaporative cooling. Compared to a single-stage evaporative cooling system, this significantly improves energy efficiency. Furthermore, the upstream heat exchange system can preheat or precool the air before it passes through the downstream system. This effectively lowers the outlet air temperature in cooling mode and raises it in heating mode. Alternatively, the upstream system can cool the air, while the downstream system can heat it, achieving reheat dehumidification.

[0074] Because the first heat pump system and the second heat pump system coexist, it is often necessary to install two outdoor units for each system. This requires two separate outdoor unit locations, consuming too much space and significantly increasing the workload of installation. Therefore, the housing includes a main unit housing and an outdoor unit housing. The main unit housing contains the supply air duct 01 and the exhaust air duct 02. The first heat pump system also includes a first compressor 11 and a first heat exchange module 12. The first heat exchange module 12 includes a first outdoor heat exchanger 35 and a heat recovery heat exchanger connected in series. The heat recovery heat exchanger is located within the exhaust air duct 02, and the fourth fresh air heat exchanger 203 is located within the supply air duct 01. The first compressor 11, the first... The outdoor heat exchanger 35, the second compressor 27, the second outdoor heat exchanger 201, and the outdoor fan 37 are all housed within the outdoor unit casing. The heat recovery heat exchanger 36 is housed within the exhaust duct 02, and the fourth fresh air heat exchanger 203 is housed within the supply air duct 01. By placing a portion of the outdoor unit components within the exhaust duct 02 and the remaining components within the outdoor unit casing, only one outdoor unit is needed to meet the requirements of both the first and second heat pump systems, reducing the space occupied by the outdoor unit and the workload of its installation.

[0075] Furthermore, in this embodiment, referring to Figure 4 The environmental control equipment may also include a first temperature sensor 3, which is connected to the control device 1. The first temperature sensor 3 is located on the air inlet side of the heat exchanger 22 to detect the temperature of the air inlet side of the heat exchanger 22. Specifically, in this embodiment, the first temperature sensor 3 is located at the air inlet of the air duct 01. Furthermore, when there is more than one heat pump system, there may be more than one first temperature sensor 3. Each heat pump system's heat exchanger 22 has a corresponding first temperature sensor 3 installed in the air inlet of the air duct 01, and each first temperature sensor 3 can be used to detect the temperature of the corresponding heat exchanger 22's air inlet side.

[0076] Furthermore, in this embodiment, referring to Figure 4 The environmental control equipment may also include a second temperature sensor 4, which is connected to the control device 1. The second temperature sensor 4 is located on the coil of the heat exchanger 22 to detect the coil temperature of the heat exchanger 22.

[0077] In this embodiment of the invention, reference is made to Figure 4The control device 1 of the environmental control equipment includes: a processor 1001 (e.g., CPU), a memory 1002, a timer 1003, etc. The components in the control device 1 are connected via a communication bus. The memory 1002 can be a high-speed RAM or a stable, non-volatile memory, such as a disk drive. Optionally, the memory 1002 can also be a storage device independent of the aforementioned processor 1001.

[0078] Those skilled in the art will understand that Figure 4 The device structure shown does not constitute a limitation on the device and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0079] like Figure 4 As shown, the memory 1002, which serves as a storage medium, may include a control program for an environmental control device. Figure 4 In the device shown, the processor 1001 can be used to call the control program of the environmental control device stored in the memory 1002 and execute the relevant steps of the control method of the environmental control device in the following embodiments.

[0080] This invention also provides a control method for an environmental control device, which is applied to the aforementioned environmental control device.

[0081] Reference Figure 5 This application proposes an embodiment of a control method for an environmental conditioning device. In this embodiment, the control method for the environmental conditioning device includes:

[0082] Step S10: Control the compressor to start, and acquire the first coil temperature data of the heat exchanger and the first air inlet temperature data of the heat exchanger;

[0083] The first coil temperature data includes one or more first temperature values ​​on the air inlet side of the heat exchanger. The first temperature value can be the temperature measured at the current moment or the temperature measured during the start-up process before the current moment.

[0084] The first temperature data includes one or more second temperature values ​​on the compressor return side. The second temperature value can be the temperature measured at the current moment or the temperature measured during the start-up process before the current moment.

[0085] The first coil temperature data and the first temperature data are both data detected by the first and second temperature sensors during the compressor's start-up process. Specifically, during compressor start-up, data detected by the first and second temperature sensors can be acquired at set intervals, and the detected data can be partially or entirely used as the corresponding first coil temperature data and first temperature data.

[0086] In this embodiment, the first coil temperature data and the first temperature data are acquired when the compressor is on and the heat exchanger is in an evaporation state. In other embodiments, the first coil temperature data and the first temperature data can also be acquired when the compressor is on and the heat exchanger is in a condensation state.

[0087] Step S20: When the first temperature data and the first coil temperature data reach the first preset condition that the heat pump system is at risk of refrigerant shortage, control the compressor to shut down.

[0088] The first preset condition specifically refers to the quantitative relationship, target value range, and / or magnitude relationship that the first temperature data and the first coil temperature data need to achieve when there is a risk of refrigerant shortage during the compressor start-up process.

[0089] When the first temperature data and the first coil temperature data reach the first preset condition, it indicates that there is a risk of refrigerant shortage in the heat pump system. In this case, the compressor can be shut down to prevent the compressor from running in a refrigerant shortage state and to protect the compressor.

[0090] When the first temperature data and the first coil temperature data do not reach the first preset condition, it indicates that there is no risk of refrigerant shortage in the heat pump system, and the compressor is kept running. Furthermore, to ensure continuous and reliable operation of the compressor after it starts, when the first temperature data and the first coil temperature data do not reach the first preset condition, the process returns to step S10.

[0091] This invention proposes a control method for an environmental conditioning device. Based on an environmental conditioning device with a heat pump system for air heat exchange within an air duct, during compressor startup, the method detects the temperature data of the first coil of the heat exchanger and the first temperature data of the air inlet side of the heat exchanger. When the first coil temperature data and the first temperature data meet a first preset condition indicating a refrigerant shortage risk in the heat pump system, the compressor is shut down. The first coil temperature data accurately reflects the heat exchange output of the heat exchanger during compressor startup, and the first temperature data accurately reflects the operating condition of the heat exchanger within the air duct during compressor startup. Combining the first coil temperature data and the first temperature data accurately characterizes the refrigerant shortage risk in the heat pump system. By promptly shutting down the compressor when a refrigerant shortage risk exists, the method ensures that the compressor will not overheat or wear due to refrigerant shortage, reducing the risk of compressor damage due to refrigerant shortage in the environmental conditioning device and effectively improving the reliability of the heat pump system.

[0092] Furthermore, based on the above embodiments, another embodiment of the control method for the environmental conditioning equipment of this application is proposed. In this embodiment, the environmental conditioning equipment includes at least two heat pump systems, each heat pump system including at least one heat exchanger disposed in the air duct, and the at least two heat exchangers are arranged sequentially along the airflow direction in the air duct, referring to... Figure 6 Step S10 includes: Step S11, controlling each compressor to start, and acquiring the first coil temperature data of each heat exchanger and the first air inlet temperature data of each heat exchanger;

[0093] Based on step S11, step S20 includes: step S21, when the first temperature data and the first coil temperature data reach the first preset condition that the heat pump system has a risk of refrigerant shortage, the corresponding compressor is controlled to shut down.

[0094] When the first temperature data and the first coil temperature data reach the first preset condition that the heat pump system has a risk of refrigerant shortage, the corresponding compressor is controlled to remain on and the first coil temperature data and the first air inlet temperature data of the corresponding heat exchanger are reacquired, and step S20 is executed.

[0095] Specifically, in this embodiment, the environmental control equipment includes a first heat pump system and a second heat pump system. The first heat pump system includes a first heat exchanger and a first compressor, and the second heat pump system includes a second heat exchanger and a second compressor. Both the first heat exchanger and the second heat exchanger are located in the air duct, with the first heat exchanger located on the air inlet side of the second heat exchanger.

[0096] Control the start of the first compressor and the second compressor, acquire the temperature data of the first sub-coil and the first air inlet data of the first heat exchanger, and acquire the temperature data of the second sub-coil and the second air inlet temperature of the second heat exchanger.

[0097] When the temperature data of the first sub-coil and the temperature data of the first inlet air meet the first preset condition, the first compressor is controlled to shut down. When the temperature data of the first sub-coil and the temperature data of the first inlet air do not meet the first preset condition, the first compressor is controlled to start, and the temperature data of the first sub-coil and the first inlet air of the first heat exchanger are reacquired. The opening and closing of the first compressor is controlled according to the temperature data of the first sub-coil and the first inlet air.

[0098] When the temperature data of the second sub-coil and the temperature data of the second inlet air meet the second preset condition, the second compressor is controlled to shut down. When the temperature data of the second sub-coil and the temperature data of the second inlet air do not meet the second preset condition, the second compressor is controlled to start, and the temperature data of the second sub-coil and the temperature data of the second inlet air of the second heat exchanger are reacquired. The opening and closing of the second compressor is controlled according to the temperature data of the second sub-coil and the temperature data of the second inlet air.

[0099] In this embodiment, in an environmental control device equipped with more than one heat pump system, the above-mentioned method helps to reduce the risk of each compressor in the environmental control device being damaged due to refrigerant shortage, and effectively improves the overall reliability of the heat pump system.

[0100] Furthermore, in one implementation of this embodiment, a corresponding temperature sensor is provided on the air inlet side of each heat exchanger, and the step of obtaining the first temperature data of the air inlet side of each heat exchanger includes: obtaining the data detected by the temperature sensor corresponding to each heat exchanger, and obtaining the first temperature data corresponding to each heat exchanger.

[0101] Specifically, the first sub-temperature sensor corresponding to the first heat exchanger is located at the air inlet of the air duct, and the second sub-temperature sensor corresponding to the second heat exchanger is located between the first heat exchanger and the second heat exchanger. The first temperature data of the first heat exchanger is detected by the first sub-temperature sensor, and the first temperature data of the second heat exchanger is detected by the second sub-temperature sensor.

[0102] In this embodiment, the first temperature data of each heat exchanger is detected by the corresponding temperature sensor, which helps to improve the accuracy of the first temperature data, thereby ensuring that the compressor shuts down in time, further reducing the risk of each compressor in the environmental control equipment being damaged due to lack of refrigerant, and effectively improving the overall reliability of the heat pump system.

[0103] Furthermore, in one implementation of this embodiment, two adjacent heat exchangers arranged sequentially along the airflow direction are defined as a first heat exchanger and a second heat exchanger. The step of obtaining the first temperature data of the air inlet side of the second heat exchanger includes: determining the first temperature data corresponding to the second heat exchanger based on the first coil temperature data corresponding to the first heat exchanger.

[0104] Specifically, a correspondence can be established in advance between the temperature data of the first coil corresponding to the first heat exchanger and the first temperature data of the second heat exchanger. This correspondence can be a quantitative relationship, a mapping relationship, etc. Based on this correspondence, the second temperature data of the second heat exchanger corresponding to the current temperature data of the first coil of the first heat exchanger can be determined.

[0105] In one implementation of this embodiment, the first compressor is defined as the compressor in the heat pump system where the first heat exchanger is located. The step of determining the first temperature data corresponding to the second heat exchanger based on the first coil temperature data corresponding to the first heat exchanger includes: determining a temperature correction value based on the air volume of the air duct, the operating frequency of the first compressor, and the first coil temperature data corresponding to the first heat exchanger; correcting the first coil temperature data corresponding to the first heat exchanger based on the temperature correction value to obtain the first temperature data corresponding to the second heat exchanger.

[0106] Specifically, in this embodiment, the temperature correction value is negatively correlated with the airflow rate, positively correlated with the operating frequency, and negatively correlated with the first coil temperature data. In other embodiments, the temperature correction value may also exhibit a different correlation with the airflow rate, operating frequency, and first coil temperature data.

[0107] Specifically, the first heat exchange output of the heat exchanger can be determined based on the operating frequency and the temperature data of the first coil, the second heat exchange required by the heat exchanger can be determined based on the air volume, and the temperature correction value here can be determined based on the ratio of the first heat exchange output to the second heat exchange output.

[0108] For example, in this embodiment, the temperature correction value Tx = (F*a - T21*b) / (Q*c), where a, b, and c are preset constant values, F is the operating frequency of the first compressor, T21 is the temperature data of the first coil of the first heat exchanger, and Q is the air volume.

[0109] In this embodiment, the temperature correction value is the temperature adjustment amplitude of the first coil temperature data corresponding to the first heat exchanger. In other embodiments, the temperature correction value may also be a proportion of the first coil temperature data corresponding to the first heat exchanger.

[0110] In another implementation of this embodiment, the first temperature data of the first coil corresponding to the first heat exchanger can be queried in the mapping table, and the matching result can be used as the first temperature data of the second heat exchanger.

[0111] In this embodiment, the first temperature data on the inlet side of the second heat exchanger is no longer detected by a temperature sensor, but is determined by the first coil temperature data of the first heat exchanger. This reduces the number of temperature sensors required to detect the inlet temperature of each heat exchanger when there is more than one heat exchanger in the duct, and also reduces the airflow resistance in the duct caused by too many temperature sensors. This helps ensure the accuracy of the first temperature data of the second heat exchanger while reducing the hardware cost and power consumption of the environmental control equipment. Furthermore, by combining the airflow of the duct, the operating frequency of the first compressor, and the temperature correction value corresponding to the first coil temperature data of the first heat exchanger to increase the first coil temperature data of the first heat exchanger, the accuracy of the obtained first temperature data of the second heat exchanger is further improved, thus further protecting the compressor.

[0112] Furthermore, based on any of the above embodiments, another embodiment of the control method for the environmental conditioning equipment of this application is proposed. In this embodiment, the first preset condition includes a first sub-condition or a second sub-condition, and step S20 includes:

[0113] When the first temperature data and the first coil temperature data reach the first sub-condition, control the compressor to shut down; or,

[0114] When the first temperature data and the first coil temperature data reach the second sub-condition, the compressor is controlled to shut down;

[0115] The first sub-condition includes that the temperature difference between the heat exchanger coil and the corresponding air inlet side is less than a preset temperature difference value, and the temperature change between the heat exchanger coil and the corresponding air inlet side is less than a preset temperature change value. The second sub-condition includes that the temperature difference between the heat exchanger coil and the corresponding air inlet side is less than a preset temperature difference value, and the temperature change of the heat exchanger coil is greater than or equal to a preset temperature change value.

[0116] When the environmental control equipment includes more than one heat pump system, the corresponding compressor is controlled to shut down when the first temperature data and the first coil temperature data corresponding to the heat exchanger located in the air duct of the heat pump system reach the first sub-condition or the second sub-condition; when the first temperature data and the first coil temperature data corresponding to the heat exchanger located in the air duct of the heat pump system do not reach the first sub-condition or the second sub-condition, the corresponding compressor is controlled to start. The compressor in each heat pump system is controlled independently.

[0117] The preset temperature difference value, preset temperature difference change value, and preset temperature change value can be fixed values ​​set in advance, or values ​​obtained based on the actual operating conditions of the environmental control equipment. Specifically, when there is more than one heat pump system, different first heat pump systems correspond to different preset temperature difference values, preset temperature difference change values, and preset temperature change values. Specifically, the preset values ​​in the first or second sub-conditions corresponding to the second heat pump system located downstream in the airflow direction can be determined based on the current first coil temperature data of the heat exchanger and the first temperature data on the air inlet side of the first heat pump system upstream in the airflow direction.

[0118] The first temperature data and the second temperature data may include the inlet air temperature and the coil temperature of the heat exchanger detected at the current time or at a time before the current time when the preset conditions are met. The difference between the inlet air temperature and the coil temperature can be used as the temperature difference value.

[0119] In this embodiment, the temperature difference change value is the rate of change of the temperature difference between the inlet air temperature and the coil temperature. In other embodiments, the temperature difference change value is the amplitude of the temperature difference between the inlet air temperature and the coil temperature. Specifically, the first temperature data may include the first inlet air temperature detected at a first moment and the second inlet air temperature detected at a second moment during the compressor start-up process. The first coil temperature data may include the first coil temperature detected at a first moment and the second coil temperature detected at a second moment during the compressor start-up process. A first difference between the first inlet air temperature and the first coil temperature is determined, a second difference between the second inlet air temperature and the second coil temperature is determined, the interval between the first moment and the second moment is determined, and the absolute value of the difference between the first difference and the second difference is determined. The ratio of the absolute value to the interval is used as the temperature difference change value. In other embodiments, the absolute value can also be directly used as the temperature difference change value. Here, the later of the first moment and the second moment can be the current moment, or both can be moments during the compressor start-up process before the current moment.

[0120] In this embodiment, the temperature change value is the amplitude of the temperature change of the heat exchanger coil when the compressor is on. In other embodiments, the temperature change value is the rate of temperature change of the heat exchanger coil when the compressor is on. Specifically, the first temperature data may include the temperature of the third coil of the heat exchanger at the third moment during the compressor's operation or within the same time period, and the second temperature data may include the temperature of the fourth coil of the heat exchanger at the fourth moment during the compressor's operation or within the same time period. The temperature change value is determined based on the difference between the fourth coil temperature and the third coil temperature.

[0121] If the coil temperature of the heat exchanger and the inlet air temperature of the heat exchanger meet the first sub-condition during the compressor start-up process, it indicates that the temperature difference between the coil temperature of the compressor and the inlet air temperature is consistently too small. This can be attributed to insufficient refrigerant circulating in the heat pump system, which prevents the heat exchanger in the duct from exchanging heat normally. For example, if the heat exchanger in the duct is in the evaporation state and the evaporation temperature is too high due to lack of refrigerant, it may continuously approach the inlet air temperature of the heat exchanger. Therefore, the risk of refrigerant shortage in the heat pump system can be accurately determined by the first sub-condition.

[0122] In addition, the fact that the coil temperature of the heat exchanger and the inlet air temperature of the heat exchanger meet the second sub-condition during the compressor start-up process indicates that the temperature difference between the coil temperature and the inlet air temperature is too small and the coil temperature of the heat exchanger fluctuates significantly after the compressor starts up. This can be attributed to insufficient refrigerant circulating in the heat pump system, which prevents the heat exchanger in the air duct from providing enough heat for normal heat exchange. Therefore, the risk of refrigerant shortage in the heat pump system can be accurately determined through the second sub-condition.

[0123] Based on this, shutting down the compressor when the first temperature data and the first coil temperature data reach the first sub-condition or the second sub-condition helps to ensure that the compressor is shut down in time when there is a risk of refrigerant shortage in the heat pump system, further reducing the risk of the compressor operating in a refrigerant shortage state, thereby further protecting the compressor and effectively improving the reliability of the heat pump system operation.

[0124] In other embodiments, a preset condition may also be included, which may include a fifth sub-condition. The fifth sub-condition is that the temperature difference between the air inlet side and the coil of the heat exchanger is less than a preset temperature difference value. When the first temperature data and the first coil temperature data reach the fifth sub-condition, the compressor is controlled to shut down.

[0125] Furthermore, based on any of the above embodiments, another embodiment of the control method for the environmental conditioning equipment of this application is proposed. In this embodiment, reference is made to... Figure 7 After step S10, the following steps are also included:

[0126] Step S201: When the compressor's operating time is less than the first preset time, execute the step of controlling the compressor to shut down when the first temperature data and the first coil temperature data reach the first sub-condition.

[0127] Step S202: When the compressor's operating time is greater than or equal to the second preset time, execute the step of controlling the compressor to shut down when the first temperature data and the first coil temperature data reach the second sub-condition;

[0128] Wherein, the second preset duration is greater than or equal to the first preset duration.

[0129] Specifically, each heat pump system in step S21 above can be controlled according to steps S201 and S202 here.

[0130] The compressor start-up duration can be obtained during or after step S10. Specifically, the compressor start-up duration can be detected during the compressor start-up process, and the required temperature data can be determined based on the corresponding sub-conditions according to the start-up duration, serving as the first temperature data and the second temperature data.

[0131] In this embodiment, when the compressor start-up time is short, the identification of refrigerant shortage risk in the heat pump system is based on the first sub-condition. This helps to avoid the impact of heat exchanger coil temperature fluctuations during the compressor start-up phase on the accuracy of refrigerant shortage risk identification, thereby further reducing the risk of compressor damage due to refrigerant shortage. When the compressor start-up time is long, the identification of refrigerant shortage risk in the heat pump system is based on the second sub-condition. After the compressor enters stable operation, when the temperature difference between the coil temperature and the inlet air temperature is too small, the change in coil temperature can more accurately reflect the operating status of the compressor during the start-up process affected by the amount of refrigerant. This can effectively improve the accuracy of the identification of refrigerant shortage status in the heat pump system during this stage, further reducing the risk of compressor damage due to refrigerant shortage.

[0132] Furthermore, in this embodiment, before the step of controlling the compressor to shut down when the first temperature data and the first coil temperature data reach the first sub-condition, the method further includes: when the compressor's operating time is less than a third preset time, determining a first preset temperature difference change value as the preset temperature difference change value; when the compressor's operating time is greater than or equal to the third preset time and less than the first preset time, determining a second preset temperature difference change value as the preset temperature difference change value; wherein, the first preset temperature difference change value is less than the second preset temperature difference change value.

[0133] When the start-up time is less than the third preset time, the compressor is in its first operating cycle after startup. During this cycle, the compressor starts and operates at increased frequency. Using a smaller preset temperature difference value during this process helps avoid misidentification of refrigerant shortage due to the small temperature difference caused by the slow change in the heat exchanger coil temperature approaching the heat exchanger's inlet air temperature. Conversely, when the start-up time is greater than or equal to the third preset time but less than the first preset time, the heat exchanger coil temperature has reached a state with a significant deviation from room temperature. In this case, using a larger preset temperature difference value helps avoid misinterpreting temperature fluctuations within a reasonable range during normal heat exchange in the heat pump system as refrigerant shortage. Therefore, this application sets different preset temperature difference values ​​based on different start-up time intervals to identify refrigerant shortage in the heat pump system, which further improves the accuracy of refrigerant shortage identification and reduces the risk of compressor damage due to refrigerant shortage.

[0134] Furthermore, in this embodiment, the first coil temperature data includes at least two first sub-temperatures detected within a first time period and at least two second sub-temperatures detected within a second time period. The compressor's operating time within the first time period is less than the second preset time period, and the compressor's operating time within the second time period is greater than or equal to the second preset time period. After the step of obtaining the first coil temperature data of the heat exchanger and the first temperature data of the air inlet side of the heat exchanger, the method further includes: when the compressor's operating time is greater than or equal to the second preset time period, determining the minimum temperature value among the at least two first sub-temperatures, determining the maximum temperature value among the at least two second sub-temperatures; and determining the first temperature change value based on the difference between the maximum temperature value and the minimum temperature value.

[0135] In this embodiment, the temperature change value is the difference between the maximum temperature value and the minimum temperature value. In other embodiments, the temperature change value may also be the result of adjusting the difference between the maximum temperature value and the minimum temperature value according to a preset coefficient or a coefficient determined by the actual operating state parameters of the environmental control equipment.

[0136] In this embodiment, the temperature change value is determined by comparing the minimum coil temperature during the initial stage after the compressor starts with the maximum coil temperature during the operation stage close to the current moment. This allows the temperature change value to accurately reflect the temperature change of the heat exchanger coil throughout the entire operation process after the compressor has been running for a long time. As a result, the change in refrigerant quantity after the compressor has been running for a long time can be accurately identified based on the temperature change value. This effectively improves the accuracy of refrigerant shortage identification in the heat pump system and allows for timely shutdown of the compressor, which helps to further reduce the damage to the compressor caused by refrigerant shortage.

[0137] Furthermore, based on any of the above embodiments, another embodiment of the control method for the environmental conditioning equipment of this application is proposed. In this embodiment, reference is made to... Figure 8 After step S20, the following steps are also included:

[0138] Step S30: Obtain the compressor shutdown duration, the second temperature data of the air inlet side of the heat exchanger, and the second coil temperature data of the heat exchanger;

[0139] Step S40: When the shutdown duration is greater than or equal to the fourth preset duration, and / or when the third temperature data and the second coil temperature data reach the second preset condition that there is no risk of refrigerant shortage in the heat pump system, control the compressor to start.

[0140] In this embodiment, when the shutdown duration is greater than or equal to the fourth preset duration, and the second temperature data and the second coil temperature data meet the second preset condition, it can be considered that the heat pump system is not at risk of refrigerant shortage. In other embodiments, it can also be considered that the heat pump system is not at risk of refrigerant shortage when either the shutdown duration is greater than or equal to the fourth preset duration or the second temperature data and the second coil temperature data meet the second preset condition.

[0141] Furthermore, in this embodiment, the second preset condition includes the number of times the first sub-condition or the second sub-condition is satisfied during the compressor shutdown process being less than or equal to a preset threshold. Specifically, the data corresponding to the second temperature data and the second coil temperature data in the first shutdown phase is the first target data, and the data corresponding to the second temperature data and the second coil temperature data in the second shutdown phase is the second target data. The compressor shutdown duration in the first shutdown phase is less than a fifth preset duration, the fifth preset duration is less than a fourth preset duration, and the compressor shutdown duration in the second shutdown phase is greater than or equal to the fifth preset duration. The number of times this occurs can include the sum of the number of times the first target data satisfies the first sub-condition and the number of times the second target data satisfies the second sub-condition.

[0142] Specifically, the preset temperature difference change value in the first sub-condition during the shutdown process can be the first preset temperature difference change value mentioned above, or it can be other values.

[0143] In this embodiment, the refrigerant shortage is accurately eliminated by the shutdown duration and / or the second temperature data and the second coil temperature data, and the compressor is automatically turned on in a timely manner. Based on this, it is beneficial to meet the normal heat exchange requirements of the heat pump system while protecting the compressor.

[0144] In other embodiments, the system can be determined to be free of refrigerant shortage upon receiving a preset command input by the user, and the compressor can be controlled to start. In other embodiments, when the shutdown duration is greater than or equal to a fourth preset duration, and when the second temperature data and the second coil temperature data do not meet the aforementioned first sub-condition and / or second sub-condition, the system can be determined to be free of refrigerant shortage, and the compressor can be controlled to start.

[0145] Furthermore, this invention also proposes a storage medium storing a control program for an environmental control device. When the control program for the environmental control device is executed by a processor, it implements the relevant steps of any of the above embodiments of the control method for the environmental control device.

[0146] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element.

[0147] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0148] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, environmental control device, or network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0149] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural or procedural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.

Claims

1. A control method for an environmental control device, characterized in that, The environmental control equipment includes an air duct and a heat pump system. The heat pump system includes a compressor and a heat exchanger located within the air duct. The control method for the environmental control equipment includes the following steps: The compressor is controlled to start, and the first coil temperature data of the heat exchanger and the first air inlet temperature data of the heat exchanger are acquired. When the first temperature data and the first coil temperature data reach the first preset condition that the heat pump system is at risk of refrigerant shortage, the compressor is controlled to shut down. The first preset condition includes a first sub-condition or a second sub-condition. The step of controlling the compressor to shut down when the first temperature data and the first coil temperature data reach the first preset condition that the heat pump system has a risk of refrigerant shortage includes: When the compressor's operating time is less than the first preset time, and when the first temperature data and the first coil temperature data reach the first sub-condition, the compressor is controlled to shut down. When the compressor's operating time is greater than or equal to the second preset time, and when the first temperature data and the first coil temperature data reach the second sub-condition, the compressor is controlled to shut down. The first sub-condition includes that the temperature difference between the heat exchanger coil and the corresponding air inlet side is less than a preset temperature difference value, and the temperature change between the heat exchanger coil and the corresponding air inlet side is less than a preset temperature change value. The second sub-condition includes that the temperature difference between the heat exchanger coil and the corresponding air inlet side is less than a preset temperature difference value, and the temperature change of the heat exchanger coil is greater than or equal to a preset temperature change value. The second preset duration is greater than or equal to the first preset duration.

2. The control method for the environmental control equipment as described in claim 1, characterized in that, The environmental control equipment includes at least two heat pump systems, each heat pump system including at least one heat exchanger disposed in the air duct, and the at least two heat exchangers are arranged sequentially along the airflow direction in the air duct. The step of controlling the compressor to start and acquiring the first temperature data of the air inlet side of the heat exchanger and the coil temperature of the heat exchanger includes: Control each compressor to start, and acquire the first coil temperature data of each heat exchanger and the first air inlet temperature data of each heat exchanger; The step of controlling the compressor to shut down when the first temperature data and the first coil temperature data reach a first preset condition indicating a risk of refrigerant shortage in the heat pump system includes: When the first temperature data and the first coil temperature data reach the first preset condition that the heat pump system is at risk of refrigerant shortage, the corresponding compressor is controlled to shut down.

3. The control method for the environmental control equipment as described in claim 2, characterized in that, Each heat exchanger is equipped with a corresponding temperature sensor on its air inlet side. The step of acquiring the first temperature data of the air inlet side of each heat exchanger includes: The data detected by the temperature sensor corresponding to each heat exchanger is obtained to obtain the first temperature data corresponding to each heat exchanger.

4. The control method for the environmental control equipment as described in claim 2, characterized in that, The steps for defining two adjacent heat exchangers arranged sequentially along the airflow direction as the first heat exchanger and the second heat exchanger, and obtaining the first temperature data of the air inlet side of the second heat exchanger, include: The first temperature data corresponding to the second heat exchanger is determined based on the first coil temperature data corresponding to the first heat exchanger.

5. The control method for the environmental control equipment as described in claim 4, characterized in that, The first compressor is defined as the compressor in the heat pump system where the first heat exchanger is located. The step of determining the first temperature data corresponding to the second heat exchanger based on the first coil temperature data corresponding to the first heat exchanger includes: The temperature correction value is determined based on the air volume of the air duct, the operating frequency of the first compressor, and the temperature data of the first coil corresponding to the first heat exchanger. Increase the temperature data of the first coil corresponding to the first heat exchanger according to the temperature correction value to obtain the first temperature data corresponding to the second heat exchanger.

6. The control method for the environmental control equipment as described in claim 5, characterized in that, The temperature correction value is negatively correlated with the air volume, positively correlated with the operating frequency, and negatively correlated with the temperature data of the first coil.

7. The control method for the environmental control equipment as described in any one of claims 1 to 6, characterized in that, Before the step of controlling the compressor to shut down when the first temperature data and the first coil temperature data reach the first sub-condition, the method further includes: When the compressor's operating time is less than the third preset time, the first preset temperature difference change value is determined to be the preset temperature difference change value; When the compressor's operating time is greater than or equal to the third preset time and less than the first preset time, the second preset temperature difference change value is determined to be the preset temperature difference change value. Wherein, the first preset temperature difference change value is less than the second preset temperature difference change value.

8. The control method for the environmental control equipment as described in any one of claims 1 to 6, characterized in that, The first coil temperature data includes at least two first sub-temperatures detected within a first time period and at least two second sub-temperatures detected within a second time period. The compressor's operating time within the first time period is less than the second preset time period, and the compressor's operating time within the second time period is greater than or equal to the second preset time period. After the step of acquiring the first coil temperature data of the heat exchanger and the first temperature data of the air inlet side of the heat exchanger, the method further includes: When the compressor's operating time is greater than or equal to the second preset time, the minimum temperature value among the at least two first sub-temperatures is determined, and the maximum temperature value among the at least two second sub-temperatures is determined. The temperature change value is determined based on the difference between the maximum temperature value and the minimum temperature value.

9. The control method for the environmental control equipment as described in any one of claims 1 to 6, characterized in that, After the step of controlling the compressor to shut down when the first temperature data and the first coil temperature data reach the first preset condition that the heat pump system has a risk of refrigerant shortage, the method further includes: Acquire the compressor's shutdown duration, the second temperature data of the air inlet side of the heat exchanger, and the second coil temperature data of the heat exchanger; When the shutdown duration is greater than or equal to the fourth preset duration, and / or when the second temperature data and the second coil temperature data reach the second preset condition that the heat pump system has no risk of refrigerant shortage, the compressor is controlled to start.

10. The control method for the environmental control equipment as described in claim 9, characterized in that, The second preset condition includes the number of times the first sub-condition or the second sub-condition is met during the compressor shutdown process being less than or equal to a preset threshold.

11. An environmental control device, characterized in that, The environmental control equipment includes: Air duct; A heat pump system, comprising a compressor and a heat exchanger located within the air duct, A control device, wherein the heat pump system is connected to the control device, the control device comprising: a memory, a processor, and a control program for an environmental conditioning device stored in the memory and executable on the processor, wherein the control program for the environmental conditioning device, when executed by the processor, implements the steps of the control method for the environmental conditioning device as described in any one of claims 1 to 10.

12. The environmental control equipment as described in claim 11, characterized in that, The environmental control equipment includes at least two heat pump systems, and the heat exchangers in the at least two heat pump systems are arranged sequentially along the airflow direction in the air duct.

13. A storage medium, characterized in that, The storage medium stores a control program for an environmental control device, which, when executed by a processor, implements the steps of the control method for an environmental control device as described in any one of claims 1 to 10.

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