Heat pump system, control method thereof, air conditioner and storage medium

Abstract

The application discloses a heat pump system, a control method of the heat pump system, an air conditioner and a storage medium. The heat pump system comprises a compressor, a heat storage module and a lubricating oil branch, an oil pool is arranged in the compressor; the heat storage module is arranged outside the compressor; the two ends of the lubricating oil branch are communicated with the oil pool, a first fluid component is arranged in the lubricating oil branch to control the flow of liquid in the lubricating oil branch, and the lubricating oil branch is in heat exchange connection with the heat storage module. The application aims to improve the heating efficiency of the heat pump system.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heat pump, in particular to a heat pump system, a control method of the heat pump system, an air conditioner and a storage medium. BACKGROUND

[0002] The compressor in the equipment such as air conditioner needs to run in low-temperature working condition in many scenes, and the compressor is generally provided with a heating device (for example, crank heating belt or internal coil winding of the compressor), which can be started to preheat the compressor in low-temperature environment, so as to separate the lubricating oil and refrigerant in the compressor and avoid oil shortage damage when the compressor starts.

[0003] However, the heating device such as crank heating belt arranged outside the compressor is used for preheating, and the heat needs to be transmitted from the outside of the compressor to the inside of the compressor, so the heating efficiency is low; and the heating device such as coil winding arranged inside is used for preheating, and the heating amount is small, so the heating efficiency is low. It can be seen that the current preheating mode of the compressor has the problem of low heating efficiency. SUMMARY

[0004] The main purpose of the present application is to provide a heat pump system, a control method of the heat pump system, an air conditioner and a storage medium, which aims to improve the heating efficiency of the heat pump system.

[0005] To achieve the above-mentioned purpose, the present application provides a heat pump system, which comprises:

[0006] A compressor, wherein an oil pool is arranged inside the compressor;

[0007] A heat storage module arranged outside the compressor;

[0008] A lubricating oil branch, both ends of which are communicated with the oil pool, the lubricating oil branch is provided with a first fluid component to control the flow of liquid in the lubricating oil branch, and the lubricating oil branch is in heat exchange connection with the heat storage module.

[0009] Optionally, the heat pump system further comprises:

[0010] A heat exchange pipeline communicated with the exhaust port of the compressor,

[0011] A refrigerant branch, both ends of which are communicated with the heat exchange pipeline, and the refrigerant branch is provided with a second fluid component to control the flow of refrigerant in the refrigerant branch.

[0012] Optionally, a region in which the refrigerant branch is in heat exchange connection with the heat storage module is defined as a second heat exchange part, and the second fluid component comprises a first control valve and a second control valve arranged at both ends of the second heat exchange part, respectively.

[0013] Optionally, the heat storage module is attached to an outer wall of the compressor and is arranged outside the oil pool.

[0014] Optionally, the heat storage module is arranged in a ring shape or a fan ring shape.

[0015] Optionally, the heat pump system further comprises a heating element arranged inside the compressor.

[0016] Optionally, the heat pump system further comprises an electric auxiliary heating assembly in heat exchange connection with the heat storage module.

[0017] Optionally, the first fluid assembly comprises a circulating pump and an on-off assembly, a region where the lubricating oil branch is in heat exchange connection with the heat storage module is defined as a first heat exchange part, and the on-off assembly comprises a first on-off valve and a second on-off valve arranged at two ends of the first heat exchange part respectively.

[0018] In addition, in order to achieve the above-mentioned purpose, the application further provides a control method of a heat pump system, based on any one of the heat pump systems, the control method of the heat pump system comprises:

[0019] acquiring a shutdown state parameter of the compressor when the compressor is in a shutdown state;

[0020] controlling the first fluid assembly to be turned on to heat the lubricating oil and the refrigerant in the oil pool by using the heat in the heat storage module when the shutdown state parameter meets a preset condition.

[0021] Optionally, the shutdown state parameter comprises a shutdown duration and a first temperature of the oil pool, and the preset condition comprises that the shutdown duration is less than or equal to a corresponding heat storage duration of the heat storage module and the first temperature is less than or equal to a first preset temperature.

[0022] Optionally, the heat pump system further comprises an electric auxiliary heating assembly in heat exchange connection with the heat storage module and / or a heating element arranged inside the compressor, and the step of controlling the first fluid assembly to be turned on when the shutdown state parameter meets the preset condition comprises:

[0023] controlling the first fluid assembly to be turned on when the shutdown duration and the first temperature meet the preset condition and when the first temperature is greater than or equal to a second preset temperature;

[0024] controlling the first fluid assembly to be turned on, and controlling the heating element to be turned on and / or the electric auxiliary heating assembly to be turned on when the shutdown duration and the first temperature meet the preset condition and when the first temperature is less than a third preset temperature;

[0025] The second preset temperature is less than the first preset temperature, and the third preset temperature is less than or equal to the second preset temperature.

[0026] Optionally, the heat pump system further comprises a heat exchange pipeline and a refrigerant branch, the heat exchange pipeline is in communication with the exhaust port of the compressor, both ends of the refrigerant branch are in communication with the heat exchange pipeline, and the control method of the heat pump system further comprises:

[0027] When the compressor is in the open state, the second fluid component on the refrigerant branch is controlled to enable the heat storage module to store the refrigerant heat in the refrigerant branch.

[0028] Optionally, the heat pump system further comprises an electric auxiliary heating component in heat exchange connection with the heat storage module and / or a heating element arranged in the compressor, and the control method of the heat pump system further comprises:

[0029] Before the compressor is started for the first time, a second temperature of the oil pool is acquired, and when the second temperature is less than or equal to a fourth preset temperature, the heating element is controlled to be turned on and / or the electric auxiliary heating component is controlled to be turned on.

[0030] When the compressor is in the shutdown state, the step of acquiring the shutdown state parameter of the compressor is performed after the compressor is started for the first time.

[0031] Optionally, the step of controlling the heating element to be turned on and / or the electric auxiliary heating component to be turned on when the second temperature is less than or equal to the fourth preset temperature comprises:

[0032] When the second temperature is less than or equal to the fourth preset temperature, the heating element is controlled to be turned on.

[0033] When the heating element operates to reach a set condition, the electric auxiliary heating component is controlled to be turned on.

[0034] Optionally, the set condition comprises that the opening duration of the heating element is greater than or equal to a set duration, and the current temperature of the oil pool is less than or equal to the fourth preset temperature.

[0035] In addition, in order to achieve the above-mentioned purpose, the application further provides an air conditioner, which comprises a control device and the heat pump system according to any one of the above-mentioned heat pump systems, and the control device comprises a memory, a processor and a control program of the heat pump system stored in the memory and executable on the processor, and the control program of the heat pump system is executed by the processor to implement the steps of the control method of the heat pump system according to any one of the above-mentioned heat pump systems.

[0036] In addition, in order to achieve the above-mentioned object, the application further provides a storage medium, wherein the storage medium stores a control program of a heat pump system, and the control program of the heat pump system is executed by a processor to implement the steps of the control method of the heat pump system according to any one of the above-mentioned embodiments.

[0037] The application provides a heat pump system, wherein a heat storage structure and a lubricating oil branch are arranged in the heat pump system, two ends of the lubricating oil branch are communicated with an oil pool in a compressor, and when a first fluid assembly is opened, a mixed liquid of refrigerant and lubricating oil in the oil pool can flow through the lubricating oil branch to absorb heat stored in the heat storage module, and after heat absorption, the liquid refrigerant in the mixed liquid is gasified and separated from the lubricating oil, in this process, the heat storage module is arranged outside the compressor, the limitation on heat generation can be reduced, sufficient heat can be ensured for starting preheating of the compressor, and the external heat storage module can directly exchange heat with the liquid in the oil pool, so that heat does not need to be transferred from the outside to the inside of the compressor, thereby effectively improving the heating efficiency of the heat pump system. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 FIG. 1 is a structural schematic diagram of an embodiment of the heat pump system of the application;

[0039] Figure 2 FIG. 2 is a structural schematic diagram of an embodiment of the heat storage module in the heat pump system of the application;

[0040] Figure 3 FIG. 3 is a structural schematic diagram of the hardware structure related to the operation of an embodiment of the heat pump system of the application;

[0041] Figure 4 FIG. 4 is a flowchart of an embodiment of the control method of the heat pump system of the application;

[0042] Figure 5 FIG. 5 is a flowchart of another embodiment of the control method of the heat pump system of the application;

[0043] Figure 6 FIG. 6 is a flowchart of still another embodiment of the control method of the heat pump system of the application.

[0044] The implementation, functional features and advantages of the application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0045] It should be understood that the specific embodiments described herein are merely intended to explain the application, and are not intended to limit the application.

[0046] The application provides a heat pump system. In the embodiment, the heat pump system is built in an air conditioner. In other embodiments, the heat pump system can also be arranged in other devices, such as a water heater.

[0047] In the embodiment of the application, the following will be described with reference toFigure 1 and Figure 2 The heat pump system comprises a compressor 2, a heat storage module 8 and a lubricating oil branch 4. The compressor 2 is internally provided with an oil pool, the heat storage module 8 is externally provided on the compressor 2, both ends of the lubricating oil branch 4 are in communication with the oil pool, the lubricating oil branch 4 is provided with a first fluid component 11 to control the flow of liquid in the lubricating oil branch 4, and the lubricating oil branch 4 is in heat exchange connection with the heat storage module 8.

[0048] The oil pool is a liquid collecting device for lubricating oil in the compressor 2, and is generally arranged at the bottom of the compressor 2.

[0049] The main body of the lubricating oil branch 4 is arranged around the outside of the compressor 2.

[0050] In the embodiment, the heat storage module 8 is arranged on the outer wall of the compressor 2. In other embodiments, the heat storage module 8 can be arranged separately from the compressor 2. The heat storage module 8 can comprise a shell 81 and a phase change layer 82 arranged in the shell 81. The phase change layer 82 is a structure layer composed of a phase change material, and the heat storage and release are realized by phase change of the material. In the embodiment, the heat stored in the heat storage module 8 is the heat generated in the process of operation of the heat pump system, which can be the heat generated by the compression body of the compressor 2 after the compressor 2 is turned on; can also be the heat generated by the refrigerant in the refrigerant circulation loop connected with the compressor 2; can also be the heat generated by the heating components other than the compressor 2 in the heat pump system, etc. In other embodiments, the heat stored in the heat storage module 8 can also be the heat generated by other devices or external environment outside the heat pump system.

[0051] The first fluid component 11 can be used to control the on-off of the lubricating oil branch 4 and / or the flow rate of the liquid flowing therethrough. The lubricating oil branch 4 is in communication with the oil pool to form a liquid circulation loop, and when the first fluid component 11 is turned on, the liquid in the oil pool can enter the lubricating oil branch 4 to exchange heat with the heat storage module 8.

[0052] The heat storage module 8 comprises a shell 81 and a phase change layer 82 arranged in the shell 81. The phase change layer 82 is a structure layer composed of a phase change material, and the heat storage and release are realized by phase change of the material. The region of the lubricating oil branch 4 in heat exchange connection with the heat storage module 8 (specifically in heat exchange connection with the phase change layer 82) is defined as a second heat exchange part, and the second heat exchange part is arranged in the form of a coil pipe to improve the heat exchange efficiency.

[0053] The heat pump system provided in the embodiment includes a heat storage structure and a lubricating oil branch 4. Two ends of the lubricating oil branch 4 are communicated with an oil pool in the compressor 2. When the first fluid assembly 11 is opened, the mixed liquid of the refrigerant and the lubricating oil in the oil pool can flow through the lubricating oil branch 4 to absorb the heat stored in the heat storage module 8. After absorbing the heat, the liquid refrigerant in the mixed liquid is vaporized and separated from the lubricating oil. In this process, the heat storage module 8 is arranged outside the compressor 2, which can reduce the limitation on the heat generation and ensure sufficient heat for the start-up preheating of the compressor 2. In addition, the external heat storage module 8 can directly exchange heat with the liquid in the oil pool, and the heat does not need to be transferred from the outside to the inside of the compressor 2, thereby effectively improving the heating efficiency of the heat pump system. In addition, the use of the heat storage module 8 can reduce the energy consumption required by the electrically controlled heating component.

[0054] Further, in an embodiment, referring to Figure 1 , the heat pump system further includes a heat exchange pipeline 1 and a refrigerant branch 9. The heat exchange pipeline 1 is communicated with the exhaust port of the compressor 2. Two ends of the refrigerant branch 9 are communicated with the heat exchange pipeline 1. The refrigerant branch 9 is provided with a second fluid assembly 10 to control the flow of the refrigerant in the refrigerant branch 9. In the embodiment, the heat exchange pipeline 1 is provided with a four-way valve, an outdoor heat exchanger, a throttling device and an indoor heat exchanger. The four ports of the four-way valve are respectively connected with the exhaust port of the compressor, the suction port of the compressor, the outdoor heat exchanger and the indoor heat exchanger. The throttling device is connected between the outdoor heat exchanger and the indoor heat exchanger. The two ends of the refrigerant branch 9 can be connected to the exhaust port of the compressor and the four-way valve, or the two ends of the refrigerant branch 9 can be respectively connected to the exhaust port of the compressor and the four-way valve and the suction port of the compressor and the four-way valve.

[0055] The second fluid assembly 10 can be used to control the on-off and / or the flow of the liquid flowing through the refrigerant branch 9. When the second fluid assembly 10 is opened, the high-temperature refrigerant discharged by the compressor 2 can enter the refrigerant branch 9 to exchange heat with the heat storage module 8. The heat storage module 8 can absorb the heat of the refrigerant flowing through the refrigerant branch 9 and store it.

[0056] In the embodiment, through the setting of the refrigerant branch 9, the heat of the high-temperature refrigerant discharged by the compressor 2 when the compressor 2 is opened can be stored in the heat storage module 8, realizing heat recycling during the operation of the compressor 2 to reduce the energy consumption required for the preheating of the compressor 2.

[0057] Further, in an embodiment, referring to Figure 1 , the region where the refrigerant branch 9 and the heat storage module 8 are in heat exchange connection is defined as a second heat exchange part. The second fluid assembly 12 includes a first control valve and a second control valve respectively arranged at two ends of the second heat exchange part.

[0058] The first control valve and / or the second control valve can be an electromagnetic valve or a stop valve, etc. The second heat exchange part is in the form of a coil pipe to improve the heat exchange efficiency.

[0059] In the embodiment, the control valves are arranged at both ends of the second heat exchange part to ensure that the heat exchange pipeline 1 does not have refrigerant entering the second heat exchange part when there is no need for heat storage, and to ensure that there is sufficient amount of refrigerant for refrigerant circulation to improve the heat exchange effect of the equipment in which the heat pump system is located.

[0060] In other embodiments, the second fluid assembly 12 includes a single control valve arranged on the refrigerant branch 9.

[0061] Further, in an embodiment, with reference to Figure 1 , the heat storage module 8 is attached to the outer wall of the compressor 2, and the heat storage module 8 is arranged outside the oil pool.

[0062] The area of the contact surface between the heat storage module 8 and the outer wall of the compressor 2 is greater than or equal to the total area of the inner side wall of the oil pool.

[0063] In the embodiment, the oil pool is arranged at the bottom of the compressor 2, and the heat storage module 8 is attached to the outer wall of the bottom of the compressor 2.

[0064] In the embodiment, through the above arrangement, when the compressor 2 is stopped, the heat of the heat storage module 8 can be used to heat the oil pool, avoid the temperature being too low to cause the refrigerant to condense, reduce the amount of refrigerant mixed in the lubricating oil, and improve the separation efficiency of the lubricating oil and the refrigerant during preheating, to further reduce the risk of oil shortage when the compressor 2 is started.

[0065] Further, in an embodiment, with reference to Figure 1 and Figure 2 , the heat storage module 8 is arranged in the form of a ring or a fan ring.

[0066] A channel matching the outer contour of the compressor 2 is formed in the heat storage module 8, and the compressor 2 is arranged in the channel and attached to the heat storage module 8, and is aligned with the oil pool.

[0067] In the embodiment, the heat storage module 8 is arranged in the form of a ring, which improves the uniform heating of the oil pool at different positions by the heat storage module 8, further improves the heat preservation effect, and further reduces the risk of oil shortage when the compressor 2 is started.

[0068] Further, in an embodiment, the heat pump system further includes a heating element 01 arranged inside the compressor 2.

[0069] In the embodiment, the heating element 01 is an electric heating element 01, which can generate heat when powered. Specifically, the heating element 01 includes a coil winding, which can generate heat when powered to preheat the start of the compressor 2. In other embodiments, the heating element 01 can also be other types of heating elements 01, such as heat storage elements or heating tapes, etc.

[0070] In the embodiment, the heating element 01 is arranged inside the compressor 2, which is beneficial when the heat stored in the heat storage module 8 is insufficient. The heating element 01 can be used to release heat to separate the lubricating oil and the refrigerant, thereby reducing the risk of oil shortage when the compressor 2 starts, and preventing damage to the compressor 2.

[0071] Further, in an embodiment, referring to Figure 1 , the heat pump system further comprises an electric auxiliary heating assembly 7, which is in heat exchange connection with the heat storage module 8.

[0072] The electric auxiliary heating assembly 7, the refrigerant branch 9, and the lubricating oil branch 4 are all in heat exchange connection with the same region (such as the phase change layer 82, etc.) in the heat storage module 8.

[0073] In the embodiment, the electric auxiliary heating assembly 7 can be an electric heating tape, etc.

[0074] In the embodiment, according to the above arrangement, when the heat stored in the heat storage module 8 is insufficient, the electric auxiliary heating assembly 7 can be used to supplement the heat, thereby ensuring that the heat storage module 8 has sufficient heat to quickly heat the mixture of lubricating oil and refrigerant in the lubricating oil branch 4, realizing the rapid separation of the refrigerant and the lubricating oil, and effectively reducing the risk of oil shortage when the compressor 2 starts.

[0075] Further, in an embodiment, referring to Figure 1 , the first fluid assembly 11 comprises a circulating pump 6 and an on-off assembly 5, and the region where the lubricating oil branch 4 is in heat exchange connection with the heat storage module 8 is defined as a first heat exchange part, and the on-off assembly 5 comprises a first on-off valve and a second on-off valve arranged at both ends of the first heat exchange part, respectively.

[0076] When the circulating pump 6 is turned on and the on-off assembly 5 is opened, the liquid in the oil pool can flow through the lubricating oil branch 4 and the heat storage module 8 for heat exchange and then return to the oil pool.

[0077] When the circulating pump 6 is turned off and the on-off assembly 5 is closed, the liquid in the oil pool stays in the oil pool.

[0078] In the embodiment, through the arrangement of the circulating pump 6 and the on-off assembly 5, it is ensured that the lubricating oil and the refrigerant in the oil pool will flow to the outside of the compressor 2 for treatment only when it is necessary to separate the lubricating oil and the refrigerant, otherwise they will stay in the oil pool, avoiding the loss of the amount of lubricating oil and the amount of refrigerant participating in the operation of the compressor 2, so as to further prevent damage to the compressor 2 and ensure the output capacity of the heat pump system.

[0079] In other embodiments, the first fluid assembly 11 can also include the on-off assembly 5 without the circulation pump 6, or the first fluid assembly 11 can also include the circulation pump 6 without the on-off assembly 5, or the first fluid assembly 11 can include other flow regulating assemblies other than the circulation pump 6 and the on-off assembly 5.

[0080] Further, in an embodiment, referring to Figure 1 , the heat pump system can further include a temperature sensor 3 arranged in the oil pool, and the temperature sensor 3 can be used to detect the temperature of the oil pool.

[0081] The embodiment of the present application also proposes a control device 100 applied to control the heat pump system.

[0082] In the embodiment of the present application, referring to Figure 3 , the control device 100 of the heat pump system includes a processor 1001, such as a CPU, a memory 1002 and a timer 1003. These components are connected through a communication bus for communication. The memory 1002 can be a high-speed RAM memory, or a stable memory (non-volatile memory), such as a disk memory. The memory 1002 can also be an optional storage device independent of the aforementioned processor 1001.

[0083] The control device 100 can be connected with the temperature sensor 3 arranged in the oil pool, and the temperature sensor 3 can be used to detect the temperature of the oil pool.

[0084] Those skilled in the art can understand that Figure 3 The device structure shown in the embodiment is not a limitation to the terminal, and can include more or less components than the figure, or combine some components, or different component arrangements.

[0085] As shown in Figure 3 , the memory 1002 as a computer storage medium can include a control program of the heat pump system, and the processor 1001 can be used to call the control program of the heat pump system stored in the memory 1002, and perform the related step operations of the control method of the heat pump system in the following embodiments.

[0086] The embodiment of the present application also provides a control method of a heat pump system applied to the heat pump system.

[0087] Referring to Figure 4 , an embodiment of the control method of the heat pump system is proposed. In the embodiment, the control method of the heat pump system includes:

[0088] Step S10, acquiring a shutdown state parameter of the compressor when the compressor is in a shutdown state.

[0089] The shutdown state parameter herein is a state parameter representing the mixing degree of the lubricating oil and the refrigerant in the oil pool when the compressor is in the shutdown state.

[0090] The shutdown state parameter includes the shutdown duration, the temperature in the oil pool, and / or the ambient temperature of the environment where the compressor is located, etc.

[0091] The shutdown state parameter can be detected by a detection module arranged in the compressor or by a detection module outside the compressor.

[0092] The shutdown state herein specifically refers to the shutdown of the compressor.

[0093] In step S20, when the shutdown state parameter meets the preset condition, the first fluid component is opened to heat the lubricating oil and the refrigerant in the oil pool by using the heat in the heat storage module.

[0094] The preset condition is a condition that the shutdown state parameter needs to meet when the compressor is started up with the risk of oil deficiency. The preset condition can include a parameter interval that the shutdown state parameter needs to meet, and / or a target size relationship between the shutdown state parameter and a target parameter, and / or a target quantity relationship between the shutdown state parameter and the target parameter.

[0095] When the shutdown state parameter meets the preset condition, it indicates that the compressor started up in this state will have the risk of oil deficiency, and at this time, opening the first fluid component allows the mixed liquid of the lubricating oil and the refrigerant in the oil pool to flow into the lubricating oil branch to absorb the heat stored in the heat storage module, and after absorbing the heat, the refrigerant can be separated from the lubricating oil.

[0096] When the first fluid component includes the circulating pump and the on-off component, opening the first fluid component includes opening the circulating pump and opening the on-off component.

[0097] The control method of the heat pump system proposed in the embodiment can realize the preheating of the compressor by using the heat exchange between the heat storage module outside the compressor and the lubricating oil branch when the shutdown state parameter meets the preset condition during the shutdown process of the compressor, so that the refrigerant can be separated from the lubricating oil before the compressor is started up, the heat storage module is arranged outside the compressor in this process, which can reduce the limitation on the heat generation amount, ensure sufficient heat for the preheating of the compressor during startup, and the external heat storage module can directly exchange heat with the liquid in the oil pool, so that the heat does not need to be transferred from the outside to the inside of the compressor, thereby effectively improving the heating efficiency of the heat pump system.

[0098] Further, in the embodiment, the shutdown state parameter includes the shutdown duration and the first temperature of the oil pool, and the preset condition includes that the shutdown duration is less than or equal to the heat storage duration corresponding to the heat storage module and the first temperature is less than or equal to a first preset temperature.

[0099] The shutdown duration is specifically a duration that the compressor continuously stays in the shutdown state.

[0100] The first temperature is specifically detected by an oil pool temperature sensor. The first temperature is a temperature currently detected by the temperature sensor.

[0101] The heat storage duration is specifically a maximum duration that the compressor is allowed to be shutdown when the heat storage amount of the heat storage module has a separation effect on the refrigerant and the lubricating oil. The heat storage duration can be determined according to a total startup duration in a last startup phase of the compressor, a compressor operating frequency, and / or a duration that the second fluid component is started.

[0102] The shutdown duration is less than or equal to the heat storage duration, which indicates that the heat exchange between the heat storage module and the lubricating oil branch can separate the lubricating oil and the refrigerant. The first preset temperature is specifically a minimum temperature of the oil pool allowed when the lubricating oil and the refrigerant are in a separated state. The first temperature is less than or equal to the first preset temperature, which indicates that the lubricating oil in the oil pool has a risk of mixing with the refrigerant.

[0103] The first preset temperature can be specifically determined according to a phase change temperature of the refrigerant between a gaseous state and a liquid state. In this embodiment, the first preset temperature is 0℃.

[0104] In this embodiment, the shutdown duration is within the heat storage duration and the oil pool temperature is low. The liquid in the oil pool is introduced into the lubricating oil branch and the heat storage module absorbs heat to separate the lubricating oil and the refrigerant through the startup of the first fluid component, so that the compressor is not damaged due to lack of oil when the compressor is started in this state, and the compressor is effectively protected.

[0105] In other embodiments, the preset condition can also include that the first temperature is less than the first preset temperature, or that an ambient temperature of an environment where the compressor is located is less than a preset ambient temperature, and the like.

[0106] Further, based on the above embodiments, another embodiment of a control method of the heat pump system is provided. In this embodiment, the heat pump system further includes an electric auxiliary heating component in heat exchange connection with the heat storage module and / or a heating element arranged in the compressor, and the control method comprises the steps of Figure 5 , the step S20 comprises:

[0107] The step S21 comprises: when the shutdown duration and the first temperature satisfy the preset condition, and when the first temperature is greater than or equal to a second preset temperature, starting the first fluid component.

[0108] The step S22 comprises: when the shutdown duration and the first temperature satisfy the preset condition, and when the first temperature is less than a third preset temperature, starting the first fluid component, and starting the heating element and / or starting the electric auxiliary heating component.

[0109] The second preset temperature is less than the first preset temperature, and the third preset temperature is less than or equal to the second preset temperature.

[0110] In the embodiment, the third preset temperature is less than the second preset temperature. For example, the third preset temperature is -25℃, and the second preset temperature is -20℃, etc.

[0111] The second preset temperature and the third preset temperature are critical values for distinguishing different mixing degrees of the lubricating oil and the refrigerant in the oil pool.

[0112] The heating control parameter when the electric auxiliary heating assembly is turned on and / or the heating element is turned on can be a pre-set fixed parameter, or can be determined according to the deviation of the first oil temperature from the first preset temperature and / or the shutdown time length.

[0113] In the embodiment, the heating element is a coil winding, and the control of turning on the heating element specifically means energizing the coil winding. The current input is a small current, that is, the current value corresponding to the input current is less than a preset current value, and the coil winding generates heat when energized.

[0114] It should be noted that the compressor does not rotate when the heating element is turned on.

[0115] In the embodiment, the first temperature is less than or equal to the first preset temperature and greater than or equal to the second preset temperature, indicating that the mixing degree of the lubricating oil and the refrigerant is low, and the heat required for the separation of the two is less. At this time, the heat storage amount of the heat storage module is used alone to separate the lubricating oil and the refrigerant, which can ensure the rapid separation of the lubricating oil and the refrigerant. The first temperature is less than the third preset temperature, indicating that the mixing degree of the lubricating oil and the refrigerant is high, and the heat required for the separation of the two is more. At this time, in addition to using the heat storage amount of the heat storage module, the electric auxiliary heating assembly can further supplement the heat exchange amount of the heat storage module in the mode of turning on the heating element to assist heating, so as to ensure that there is enough heat to realize the rapid separation of the lubricating oil and the refrigerant.

[0116] Further, based on any of the above embodiments, another embodiment of the control method of the heat pump system is provided. In the embodiment, the heat pump system further comprises a heat exchange pipeline and a refrigerant branch, the heat exchange pipeline is in communication with the exhaust port of the compressor, and both ends of the refrigerant branch are in communication with the heat exchange pipeline. The control method of the heat pump system further comprises:

[0117] When the compressor is in an open state, the second fluid assembly on the refrigerant branch is controlled to make the heat storage module store the heat of the refrigerant in the refrigerant branch.

[0118] The second fluid assembly can be synchronously opened and closed with the compressor, that is, the opening time of the compressor is equal to the opening time of the second fluid assembly. Alternatively, the opening time of the compressor can be greater than the opening time of the second fluid assembly. Specifically, during the opening of the compressor, the second fluid assembly can be opened when the compressor operates to reach a set condition. The set condition can include that the temperature difference between the indoor temperature of the indoor space adjusted by the heat pump system and the set temperature is less than a preset value.

[0119] The step S30 can be performed before the step S10, that is, during the previous opening stage of the compressor, the second fluid assembly can be opened to make the high-temperature flow discharged by the compressor flow through the refrigerant branch and store heat into the heat storage module.

[0120] The step S30 can also be performed after the step S20, that is, when the compressor is opened after preheating, the second fluid assembly can also be opened to make the high-temperature flow discharged by the compressor flow through the refrigerant branch and store heat into the heat storage module, so that when the compressor is stopped again subsequently, the heat stored in the heat storage module can be used to separate the mixed lubricating oil and refrigerant in the manner of the steps S10 to S20.

[0121] In the embodiment, by the above manner, the heat of the high-temperature refrigerant discharged by the compressor when the compressor is opened can be stored in the heat storage module, heat recycling during the operation of the compressor is achieved, and the energy consumption required for preheating of the compressor is reduced.

[0122] Further, based on the above embodiment, another embodiment of the control method of the heat pump system is provided. In the embodiment, the heat pump system further comprises an electric auxiliary heating assembly in heat exchange connection with the heat storage module and / or a heating element arranged in the compressor. Referring to Figure 6 , the control method of the heat pump system further comprises:

[0123] In the step S01, before the initial start of the compressor, the second temperature of the oil pool is obtained, and when the second temperature is less than or equal to a fourth preset temperature, the heating element is controlled to be opened and / or the electric auxiliary heating assembly is controlled to be opened.

[0124] Here, the initial start specifically refers to the first start in an environment state in which the ambient temperature of the compressor is less than a preset ambient temperature.

[0125] The heating element and the electric auxiliary heating assembly can be opened one of them, or both can be opened. When the heating element and the electric auxiliary heating assembly are both opened, the heating element and the electric auxiliary heating assembly can be synchronously opened, or the heating element and the electric auxiliary heating assembly can be opened in sequence.

[0126] The fourth preset temperature is specifically a minimum temperature of the oil pool allowed when the lubricating oil and the refrigerant are in a separated state. The second temperature is less than or equal to the fourth preset temperature, indicating that the lubricating oil in the oil pool is at risk of mixing with the refrigerant. The fourth preset temperature can be specifically determined according to a phase change temperature of the refrigerant between a gaseous state and a liquid state. In this embodiment, the fourth preset temperature is 0℃.

[0127] Step S02, when the compressor completes the initial start, the step of obtaining the shutdown state parameter of the compressor when the compressor is in a shutdown state is performed.

[0128] In this embodiment, before the initial start of the compressor, when the heat storage module does not store the heat of the refrigerant discharged by the compressor, the compressor is preheated by turning on the heating member and / or the electric auxiliary heating assembly to separate the lubricating oil and the refrigerant in the oil pool, so as to ensure that the compressor is not damaged due to lack of oil when the compressor is started for the first time, thereby effectively protecting the compressor.

[0129] Further, in this embodiment, the step of controlling the heating member to be turned on and / or the electric auxiliary heating assembly to be turned on when the second temperature is less than or equal to the fourth preset temperature includes: controlling the heating member to be turned on when the second temperature is less than or equal to the fourth preset temperature; and controlling the electric auxiliary heating assembly to be turned on when the heating member operates to reach a set condition.

[0130] In this embodiment, the compressor is preheated by turning on the heating member first, and then the compressor is further preheated by turning on the electric auxiliary heating assembly, so as to ensure that there is sufficient heat to separate the lubricating oil and the refrigerant before the initial start of the compressor, and to further ensure that the compressor is not damaged due to lack of oil when the compressor is started for the first time, thereby effectively protecting the compressor.

[0131] Wherein, the heating member can be controlled to be turned off when the heating member does not operate to reach the set condition. Wherein, the electric auxiliary heating assembly can be maintained in an off state.

[0132] Further, in this embodiment, the set condition includes that the turning-on duration of the heating member is greater than or equal to a set duration, and that the current temperature of the oil pool is less than or equal to the fourth preset temperature. Here, the turning-on duration is long and the temperature of the oil pool is low, indicating that the preheating effect of the heating member alone is poor, and the electric auxiliary heating assembly is turned on in time to ensure that there is sufficient heat for the separation of the refrigerant and the lubricating oil.

[0133] In other embodiments, the set condition can also include that the temperature variation value of the oil pool within a set duration is less than a preset threshold, and the like.

[0134] In addition, the embodiment of the present application also proposes an air conditioner, which can include the above-mentioned heat pump system and the control device.

[0135] In addition, the embodiment of the present application further provides a storage medium, and the storage medium stores a control program of a heat pump system.

[0136] It should be noted that, in this document, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, so that a process, method, article, or system that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the statement "comprising a" does not exclude the presence of additional identical elements in the process, method, article, or system that includes the element.

[0137] The above-mentioned serial numbers of the embodiments of the present application are only for description, and do not represent the advantages and disadvantages of the embodiments.

[0138] From the above description of the embodiments, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be realized by means of software and necessary general hardware platforms, and of course, they can also be realized by hardware, but in many cases, the former is a better embodiment. Based on such understanding, the technical solutions of the present application can be embodied in the form of a software product, which is stored in a storage medium (such as a ROM / RAM, a magnetic disk, or an optical disk) as described above, and includes a number of instructions for making a terminal device (which can be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) execute the methods described in the various embodiments of the present application.

[0139] The above is only the preferred embodiment of the present application, and does not limit the patent scope of the present application, and any equivalent structure or equivalent flow transformation made by using the content of the specification and drawings of the present application, or directly or indirectly applied to other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A control method for a heat pump system, characterized in that, The heat pump system includes a compressor, a heat storage module, and a lubricating oil branch. An oil sump is located inside the compressor, and the heat storage module is located outside the compressor. Both ends of the lubricating oil branch are connected to the oil sump. A first fluid assembly is provided in the lubricating oil branch to control the liquid flow within it. The lubricating oil branch is connected to the heat storage module for heat exchange. The heat pump system also includes an electric auxiliary heating assembly connected to the heat storage module for heat exchange and / or a heating element located inside the compressor. The control method of the heat pump system includes: When the compressor is in a stopped state, the stop state parameters of the compressor are acquired; When the shutdown state parameters meet the preset conditions, the first fluid component is controlled to start, so as to use the heat in the heat storage module to heat the lubricating oil and refrigerant in the oil tank. The shutdown status parameters include shutdown duration and the first temperature of the oil sump. The step of controlling the first fluid component to start when the shutdown status parameters reach a preset condition includes: When the shutdown duration and the first temperature meet the preset conditions, and when the first temperature is greater than or equal to the second preset temperature, the first fluid component is controlled to start. When the shutdown duration and the first temperature meet the preset conditions, and when the first temperature is less than the third preset temperature, the first fluid component is controlled to turn on, and the heating element and / or the electric auxiliary heating component is controlled to turn on. The preset conditions include the shutdown duration being less than or equal to the heat storage duration corresponding to the heat storage module, the first temperature being less than or equal to the first preset temperature, the second preset temperature being less than the first preset temperature, the third preset temperature being less than or equal to the second preset temperature, and the first preset temperature being the minimum temperature of the oil sump allowed when the lubricating oil and refrigerant are in a separated state.

2. The control method for a heat pump system as described in claim 1, characterized in that, The heat pump system further includes a heat exchange pipeline and a refrigerant branch. The heat exchange pipeline is connected to the exhaust port of the compressor, and both ends of the refrigerant branch are connected to the heat exchange pipeline. The control method of the heat pump system further includes: When the compressor is in the on state, the second fluid component on the refrigerant branch is controlled to enable the heat storage module to store the heat of the refrigerant in the refrigerant branch.

3. The control method for a heat pump system as described in claim 2, characterized in that, The control method for the heat pump system also includes: Before the compressor is started for the first time, the second temperature of the oil sump is obtained. When the second temperature is less than or equal to the fourth preset temperature, the heating element and / or the electric auxiliary heating assembly are controlled to turn on. After the compressor completes its initial start-up, the step of obtaining the compressor's shutdown status parameters when the compressor is in a shutdown state is executed.

4. The control method for a heat pump system as described in claim 3, characterized in that, The step of controlling the heating element to turn on and / or the electric auxiliary heating assembly to turn on when the second temperature is less than or equal to the fourth preset temperature includes: When the second temperature is less than or equal to the fourth preset temperature, the heating element is turned on. When the heating element reaches the set operating conditions, the electric auxiliary heating assembly is controlled to turn on; The setting conditions include the heating element being turned on for a duration greater than or equal to a set duration, and the current temperature of the oil tank being less than or equal to the fourth preset temperature.

5. An air conditioner, characterized in that, The air conditioner includes a control device and a heat pump system. The heat pump system includes a compressor, a heat storage module, and a lubricating oil branch. An oil sump is provided inside the compressor. The heat storage module is located outside the compressor. Both ends of the lubricating oil branch are connected to the oil sump. A first fluid component is provided in the lubricating oil branch to control the liquid flow in the lubricating oil branch. The lubricating oil branch is heat exchanged with the heat storage module. The heat pump system also includes an electric auxiliary heating component heat exchanged with the heat storage module and / or a heating element located inside the compressor. The control device includes: a memory, a processor, and a control program for a heat pump system stored in the memory and executable on the processor. When the control program for the heat pump system is executed by the processor, it implements the steps of the control method for the heat pump system as described in any one of claims 1 to 4.

6. The air conditioner as described in claim 5, characterized in that, The heat pump system also includes: The heat exchange pipeline is connected to the exhaust port of the compressor. A refrigerant branch, both ends of which are connected to the heat exchange pipeline, is provided with a second fluid assembly to control the refrigerant flow in the refrigerant branch.

7. The air conditioner as described in claim 6, characterized in that, The area where the refrigerant branch is connected to the heat storage module is defined as the second heat exchange section. The second fluid assembly includes a first control valve and a second control valve respectively located at both ends of the second heat exchange section.

8. The air conditioner as described in claim 5, characterized in that, The heat storage module is attached to the outer wall of the compressor and is located outside the oil tank.

9. The air conditioner as described in claim 8, characterized in that, The heat storage module is arranged in a ring or fan-shaped pattern.

10. The air conditioner as described in any one of claims 5 to 9, characterized in that, The first fluid assembly includes a circulating pump and an on / off assembly. The area where the lubricating oil branch is connected to the heat storage module for heat exchange is defined as the first heat exchange section. The on / off assembly includes a first on / off valve and a second on / off valve respectively located at both ends of the first heat exchange section.

11. A storage medium, characterized in that, The storage medium stores a control program for a heat pump system, which, when executed by a processor, implements the steps of the control method for the heat pump system as described in any one of claims 1 to 4.

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