Temperature Regulation System, Temperature Regulation Method, and Storage Medium

Abstract

The present application relates to a temperature regulation system, a temperature regulation method, and a storage medium. The system includes a variable frequency compressor, an evaporator, and a condenser, wherein: the variable frequency compressor is configured to flow the generated compressed fluid to the evaporator via a heating path in a heating state, and flow the generated compressed fluid to the condenser via a refrigeration path in a refrigeration state; if the variable frequency compressor is turned off in the heating state, the heating path remains open while the refrigeration path is configured to be opened; and if the variable frequency compressor is turned off in the refrigeration state, the refrigeration path remains open while the heating path is configured to be opened. This system can prevent overcurrent on the variable frequency compressor during shutdown.

Description

Technical Field

[0001] The present application relates to a temperature regulation mechanism, and more particularly, to a temperature regulation system, a temperature regulation method, and a storage medium. Background Art

[0002] The variable frequency compressor is driven by an inverter and is widely used in household air conditioning systems, vehicle-mounted temperature regulation systems, etc. due to its advantages such as energy saving. The operating speed (frequency) of the variable frequency compressor is adjusted by the inverter according to the voltage. During the shutdown process of the unit, the speed of the variable frequency compressor gradually drops to 0, and the voltage on it also decreases accordingly. However, during this process, the pressure ratio (the ratio of the discharge pressure to the suction pressure) of the variable frequency compressor still remains at a relatively high level, which means that the load on the variable frequency compressor is still relatively high. Therefore, the current on the variable frequency compressor will increase, which may lead to an overcurrent situation on the inverter and even trigger an overcurrent alarm. Summary of the Invention

[0003] Embodiments of the present application provide a temperature regulation system, a temperature regulation method, and a storage medium for preventing overcurrent on the variable frequency compressor during shutdown.

[0004] According to one aspect of the present application, there is provided a temperature regulation system, including a variable frequency compressor, an evaporator, and a condenser, wherein: the variable frequency compressor is configured to flow the generated compressed fluid to the evaporator via a heating passage in the heating state and to the condenser via a cooling passage in the cooling state; if the variable frequency compressor is turned off in the heating state, the heating passage remains open while the cooling passage is configured to be opened; and if the variable frequency compressor is turned off in the cooling state, the cooling passage remains open while the heating passage is configured to be opened.

[0005] In some embodiments of the present application, optionally, the heating passage includes a first valve configured to control the opening of the heating passage; and the cooling passage includes a second valve configured to control the opening of the cooling passage.

[0006] In some embodiments of the present application, optionally, the opening of the cooling passage includes the opening of the condenser.

[0007] In some embodiments of the present application, optionally, the system further includes a condenser fan, and the opening of the cooling passage further includes the opening of the condenser fan.

[0008] In some embodiments of the present application, optionally, the refrigeration path is closed after being opened for a first predetermined time; the refrigeration path is closed when the current on the variable-frequency compressor is zero; and / or the refrigeration path is closed when the pressure ratio of the variable-frequency compressor is lower than a first threshold.

[0009] In some embodiments of the present application, optionally, the heating path is closed after being opened for a second predetermined time; the heating path is closed when the current on the variable-frequency compressor is zero; and / or the heating path is closed when the pressure ratio of the variable-frequency compressor is lower than a second threshold.

[0010] In some embodiments of the present application, optionally, the system is a vehicle temperature regulation system.

[0011] According to another aspect of the present application, there is provided a temperature regulation method, including: in the heating state, the compressed fluid generated by the variable-frequency compressor flows through the heating path to the evaporator; in the refrigeration state, the compressed fluid generated by the variable-frequency compressor flows through the refrigeration path to the condenser; in the heating state, if the variable-frequency compressor is turned off, the refrigeration path is opened while the heating path is kept open; and in the refrigeration state, if the variable-frequency compressor is turned off, the heating path is opened while the refrigeration path is kept open.

[0012] In some embodiments of the present application, optionally, the heating path includes a first valve, and the refrigeration path includes a second valve, wherein: the opening of the heating path is controlled by controlling the first valve; and the opening of the refrigeration path is controlled by controlling the second valve.

[0013] In some embodiments of the present application, optionally, opening the refrigeration path includes opening the condenser.

[0014] In some embodiments of the present application, optionally, the condenser is further provided with a condenser fan, and opening the refrigeration path further includes opening the condenser fan.

[0015] In some embodiments of the present application, optionally, the refrigeration path is closed after being opened for a first predetermined time; the refrigeration path is closed when the current on the variable-frequency compressor is zero; and / or the refrigeration path is closed when the pressure ratio of the variable-frequency compressor is lower than a first threshold.

[0016] In some embodiments of the present application, optionally, the heating path is closed after being opened for a second predetermined time; the heating path is closed when the current on the variable-frequency compressor is zero; and / or the heating path is closed when the pressure ratio of the variable-frequency compressor is lower than a second threshold.

[0017] According to another aspect of the present application, there is provided a computer-readable storage medium storing instructions, characterized in that when the instructions are executed by a processor, the processor is caused to execute any one of the methods described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and other objects and advantages of the present application will become more fully apparent from the following detailed description taken in conjunction with the accompanying drawings, in which like or similar elements are denoted by like reference numerals.

[0019] Figure 1 FIG. shows a temperature regulation system according to an embodiment of the present application.

[0020] Figure 2 FIG. shows a temperature regulation method according to an embodiment of the present application.

[0021] Figure 3 FIG. shows a temperature regulation method according to an embodiment of the present application.

[0022] Figure 4 FIG. shows a temperature regulation system according to an embodiment of the present application.

[0023] Figure 5 FIG. shows the principle of temperature regulation according to an embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] For the sake of simplicity and illustrative purposes, the principles of the present application are mainly described herein with reference to its exemplary embodiments. However, those skilled in the art will readily recognize that the same principles can be equivalently applied to all types of temperature regulation systems, temperature regulation methods, and storage media, and that these same or similar principles can be implemented therein, and any such variations do not depart from the true spirit and scope of the present application.

[0025] The "open" and "opened" of the passageway in the present application have the same physical meaning, and the only difference is that "open" means "maintaining open", and "opened" means "temporarily opened".

[0026] According to one aspect of the present application, there is provided a temperature regulation system. As Figure 1As shown, the temperature regulation system 10 includes a variable frequency compressor 104, an evaporator 106, and a condenser 108. Among them, the variable frequency compressor 104 is driven by an inverter 102. According to the V / f curve of the variable frequency compressor 104 working, when changing the operating speed (working frequency), the input voltage also changes accordingly. When the variable frequency compressor 104 is working normally, it compresses the gas entering it into a high-pressure and high-temperature state. Depending on the refrigerant and working requirements, liquefaction may occur in the compressed gas. In the context of the present invention, we collectively refer to the gas, liquid, or their mixture in the working circuit as fluid, and the fluid compressed by the variable frequency compressor 104 is collectively referred to as compressed fluid.

[0027] Figure 1 The partial schematic of the working circuit of the temperature regulation system 10 is shown. The working circuit can be specifically divided into a heating path for fluid flow in the heating state and a cooling path for fluid flow in the cooling state. It should be noted that in some types of temperature regulation systems, there may be overlapping paths between the heating path and the cooling path as a whole. Even in some types, most of the heating path and the cooling path overlap, only showing different fluid flow directions. In some examples of this application, the so-called opening of the heating path / cooling path means opening the fluid flow path (direction) in the heating state / the fluid flow path (direction) in the cooling state. In addition, Figure 4 The specific structure of a feasible temperature regulation system is also shown.

[0028] In the normal and stable working state, the temperature regulation system 10 can only allow one of the heating path and the cooling path to be opened. Specifically, in the heating state, the heating path is allowed to be opened, and the compressed fluid generated by the variable frequency compressor 104 flows through the heating path to the evaporator 106. In the cooling state, the cooling path is allowed to be opened, and the compressed fluid generated by the variable frequency compressor 104 flows through the cooling path to the condenser 108. Figure 1 The flow direction of the fluid after flowing through the evaporator 106 and the condenser 108 is not shown, which is a simplification for clearly explaining the principle of the present invention. The flow direction of the fluid after flowing through the evaporator 106 and the condenser 108 can be configured according to different temperature regulation systems, which does not prevent the realization of the basic principle of the present invention.

[0029] See again Figure 5, where the solid line part shows the change of speed, current and pressure ratio of the variable frequency compressor before and after shutdown over time under the prior art situation without introducing the solution of the present invention. As shown in the figure, after receiving the shutdown command at time T, the pressure ratio of the variable frequency compressor is still maintained at the level before shutdown, and then slowly decreases. In view of this, the power required by the variable frequency compressor to maintain the compressed fluid will not change drastically. On the other hand, due to the sudden shutdown of the variable frequency compressor, its operating speed will drop rapidly, and thus the voltage on it will also drop rapidly (because f∝U). According to the relationship between power, voltage and current: P=U*I, the current on the variable frequency compressor may rise to a very high level, and even trigger an overcurrent alarm. Such frequent false alarms are not conducive to monitoring the working condition of the variable frequency compressor. In view of this, we introduce the following control mechanism.

[0030] On the one hand, in the heating state, if the variable frequency compressor 104 is turned off, the cooling path is opened while the heating path is kept open. That is, in the heating state, if a shutdown command is received, the temperature control system 10 can immediately open the cooling path. In this way, the pressure of the output fluid of the variable frequency compressor 104 will be released through two paths, so the pressure ratio of the variable frequency compressor 104 will drop rapidly. Therefore, the power required by the variable frequency compressor 104 to maintain the compressed fluid operation will also drop significantly. Figure 5 , wherein the dotted line shows the changes in speed, current and pressure ratio of the variable frequency compressor 104 before and after shutdown with the introduction of the mechanism of the present invention. As shown in the figure, the pressure ratio of the variable frequency compressor 104 decreases faster than that of the prior art. In addition, the operating speed of the variable frequency compressor 104 will be slowly reduced with a smoother curve, and the current on the variable frequency compressor 104 will not jump to a high level.

[0031] On the other hand, in the cooling state, if the variable frequency compressor 104 is turned off, the heating path is opened while the cooling path is kept open. That is, in the cooling state, if a shutdown command is received, the temperature control system 10 can immediately open the heating path. In this way, the pressure of the output fluid of the variable frequency compressor 104 will be released through two paths, so the pressure ratio of the variable frequency compressor 104 will drop rapidly. Therefore, the power required by the variable frequency compressor 104 to maintain the compressed fluid operation also decreases significantly. Figure 5 The feature shown by the dotted line in FIG. 1 is also applicable to the case of shutting down in the cooling state. At this time, the pressure of the variable frequency compressor 104 drops faster than the prior art, the operating speed of the variable frequency compressor 104 will slowly decrease with a smoother curve, and the current on the variable frequency compressor 104 will not jump to a high level.

[0032] In some embodiments of the present application, Figure 1As shown, the heating path includes a first valve 110, and the opening of the heating path can be controlled by controlling the first valve 110. The cooling path includes a second valve 112, and the opening of the cooling path can be controlled by controlling the second valve 112. By using the first valve 110 and the second valve 112, the rapid opening and closing of the heating path and the cooling path can be achieved. Although the first valve 110 and the second valve 112 shown in the figure are of a split structure, in other examples, the first valve 110 and the second valve 112 can also be implemented by a single valve, for example, provided at the branch of the heating path and the cooling path, which should also be regarded as falling within the protection scope of the present application.

[0033] In some embodiments of the present application, opening the cooling path includes opening the condenser 108. As described above, when the variable-frequency compressor 104 is turned off in the heating state, the heating path is kept open while the cooling path is opened, so that the output pressure of the variable-frequency compressor 104 can be released through the two paths. Specifically, further opening the condenser 108 can cool the high-temperature and high-pressure fluid output by the variable-frequency compressor 104, thereby further releasing the output pressure of the variable-frequency compressor 104. In some embodiments of the present application, the system further includes a condenser fan 114, and opening the cooling path further includes opening the condenser fan 114. The opening of the condenser fan 114 will improve the heat dissipation efficiency of the condenser 108, thereby further releasing the output pressure of the variable-frequency compressor 104.

[0034] Further referring to Figure 5 , as shown by the dashed line in the figure, whether in the heating state or when a shutdown command is received in the heating state, the speed and pressure ratio of the variable-frequency compressor 104 first decrease and finally stabilize, and the current of the variable-frequency compressor 104 first increases and finally also stabilizes. At this time, both the cooling path and the heating path are in the open state, which is not conducive to the next startup of the temperature regulation system 10. Generally, the temperature regulation system 10 always sets a default working mode (for example, the cooling mode, the heating mode). Unless manually changed, the temperature regulation system 10 should maintain the working mode before shutdown when it is started up next time.

[0035] In some embodiments of the present application, before shutdown, the temperature regulation system 10 is in the heating state. In order to quickly release the pressure, the temperature regulation system 10 opens the cooling path when a shutdown command is received. In order to ensure that the temperature regulation system 10 can still work in the heating state when it is started up next time, the cooling path can be closed after the cooling path is opened for a first predetermined time. The first predetermined time can be selected according to actual experience. For example, after the dual-path mechanism described above is introduced, the state of the variable-frequency compressor 104 stabilizes within 7 seconds, and the cooling path can be closed after 7 seconds. The first predetermined time can also be a relatively long set time, such as 1 minute, which can fully ensure that the variable-frequency compressor 104 is in a stable state.

[0036] Another criterion for measuring whether the variable - frequency compressor 104 has stabilized is the current on the variable - frequency compressor 104. When the current on the variable - frequency compressor 104 is zero, it can be fully ensured that the variable - frequency compressor 104 is in a stable state. Therefore, the refrigeration path can be closed when the refrigeration path is turned on and the current on the variable - frequency compressor 104 becomes zero.

[0037] Another criterion for measuring whether the variable - frequency compressor 104 has stabilized is the pressure ratio of the variable - frequency compressor 104. When the pressure ratio of the variable - frequency compressor 104 is lower than (less than or equal to) a threshold value set according to experience, it can be determined that the variable - frequency compressor 104 is basically in a stable state. Therefore, the refrigeration path can be closed when the refrigeration path is turned on and the pressure ratio of the variable - frequency compressor 104 is lower than the first threshold value.

[0038] The above criteria for determining whether the variable - frequency compressor 104 has stabilized or is basically stable can be used alone or in combination, and it can be determined when to close the refrigeration path according to at least one of the criteria. The measurement of current and pressure (ratio) can utilize existing components in the temperature - control system 10 or introduce new sensor devices. In addition, the above describes when to close the temporarily - opened refrigeration path, but there is no limitation on whether to close the heating path and when to close the heating path. Whether to close the heating path can be set according to the prior art, and the closing timing can also adopt the closing conditions of the refrigeration path.

[0039] In some embodiments of the present application, before shutdown, the temperature - control system 10 is in the refrigeration state. In order to quickly relieve pressure, the temperature - control system 10 turns on the heating path when receiving the shutdown command. In order to ensure that the temperature - control system 10 can still work in the refrigeration state when starting up next time, the heating path is closed after the heating path is turned on for a second predetermined time. The second predetermined time can be selected according to actual experience. For example, after the dual - path mechanism described above is introduced, the state of the variable - frequency compressor 104 stabilizes within 6 seconds, and the heating path can be closed after 6 seconds. The second predetermined time can also be a relatively long set time, such as 1 minute, which can fully ensure that the variable - frequency compressor 104 is in a stable state. It should be noted that the values of the above first predetermined time and second predetermined time may be the same or different, and the present invention does not limit this here.

[0040] Another criterion for measuring whether the variable - frequency compressor 104 has stabilized is the current on the variable - frequency compressor 104. When the current on the variable - frequency compressor 104 is zero, it can be fully ensured that the variable - frequency compressor 104 is in a stable state. Therefore, after the heating path is turned on, when the current on the variable - frequency compressor 104 is zero, the heating path can be closed.

[0041] Another criterion for determining whether the variable-frequency compressor 104 has stabilized is the pressure ratio of the variable-frequency compressor 104. When the pressure ratio of the variable-frequency compressor 104 is lower than the threshold set based on experience, it can be determined that the variable-frequency compressor 104 is basically in a stable state. Therefore, after the heating path is turned on, the heating path can be closed after the pressure ratio of the variable-frequency compressor 104 is lower than the second threshold. It should be noted that the values of the above first threshold and second threshold may be the same or different, and the present invention does not limit this here.

[0042] The above criteria for determining whether the variable-frequency compressor 104 has stabilized or is basically stable can be used alone or in combination, and it can be determined when to close the heating path according to at least one of the criteria. The measurement of current and pressure (ratio) can utilize existing components in the temperature regulation system 10 or introduce new sensor devices. In addition, the above describes when to close the temporarily opened heating path, but does not limit whether to close the cooling path and when to close the cooling path. Whether to close the cooling path can be set according to the prior art, and its closing timing can also adopt the closing conditions of the heating path.

[0043] In some embodiments of the present application, the system is a vehicle-mounted temperature regulation system, such as a refrigerated compartment. Figure 4 A vehicle-mounted temperature regulation system 40 is shown. As shown in the figure, the temperature regulation system 40 includes a power supply 401, an inverter 402, a variable-frequency compressor 403, a hot gas bypass valve (HGV) 404, an evaporator 405 and its fan 406, a gas-liquid heat exchanger (LGHX) 407, a gas-liquid separator (Accumulator) 408, a main heating valve (MHV) 409, a condenser 410 and its fan 411, a receiver 412, and a thermostatic expansion valve (TXV) 413. The arrows on the pipelines in the figure indicate the flow direction of the fluid therein. When the fans 406 and 411 work, they will cause air flow in the illustrated direction to improve the efficiency of the evaporator 405 and the condenser 410 respectively. The functions of the above components are the same as those in the prior art. In addition, the above components can also control the overcurrent on the variable-frequency compressor 403 during shutdown according to the principles described above. For example, the hot gas bypass valve (HGV) 404 controls the opening and closing of the heating path, and the main heating valve (MHV) 409 controls the opening and closing of the cooling path. The components in the vehicle-mounted temperature regulation system 40 can cooperate in the manner described above to implement the principles of the present invention, which will not be elaborated here.

[0044] According to another aspect of the present application, a temperature regulation method is provided. As Figure 2 shown, in the normal heating state 202 of the temperature regulation method 20, the compressed fluid generated by the variable-frequency compressor flows through the heating path to the evaporator, and in the normal cooling state 212, the compressed fluid generated by the variable-frequency compressor flows through the cooling path to the condenser.

[0045] In the heating state 202, it is judged in step 204 whether the variable-frequency compressor is turned off. If the variable-frequency compressor is not turned off, the heating path is kept open; if the variable-frequency compressor is turned off, it enters state 206, and the cooling path is opened while the heating path is kept open. In some examples, in the heating state 202, if a shutdown command is received, the temperature regulation system can immediately open the cooling path. In this way, the pressure of the output fluid of the variable-frequency compressor will be released through two paths, so the pressure ratio of the variable-frequency compressor will drop rapidly. Therefore, the power required for the variable-frequency compressor to maintain the work of compressing the fluid also drops significantly accordingly. Continue to refer to Figure 5 , where the dashed line shows the changes in the speed, current and pressure ratio of the variable-frequency compressor over time before and after shutdown after the mechanism of the present invention is introduced. As shown in the figure, the pressure ratio of the variable-frequency compressor drops faster than in the prior art. In addition, the operating speed of the variable-frequency compressor will slowly decrease with a smoother curve, and the current on the variable-frequency compressor will not surge to a high level.

[0046] In the cooling state 212, it is judged in step 214 whether the variable-frequency compressor is turned off. If the variable-frequency compressor is not turned off, the cooling path is kept open; if the variable-frequency compressor is turned off, it enters state 216, and the heating path is opened while the cooling path is kept open. In some examples, in the cooling state 212, if a shutdown command is received, the temperature regulation system can immediately open the heating path. In this way, the pressure of the output fluid of the variable-frequency compressor will be released through two paths, so the pressure ratio of the variable-frequency compressor will drop rapidly. Therefore, the power required for the variable-frequency compressor to maintain the work of compressing the fluid also drops significantly accordingly. Figure 5 The characteristics shown by the dashed line in [] are also applicable to the case of shutdown in the cooling state. At this time, the pressure ratio of the variable-frequency compressor drops faster than in the prior art, the operating speed of the variable-frequency compressor will slowly decrease with a smoother curve, and the current on the variable-frequency compressor will not surge to a high level.

[0047] The temperature regulation system enters state 206 or state 216 according to the above method, and then can enter the end state 200, or can enter the end state 200 after reaching the predetermined conditions in state 206 and state 216.

[0048] In some embodiments of the present application, the heating passage includes a first valve, and the cooling passage includes a second valve. In state 206, the opening of the cooling passage can be controlled by controlling the second valve, and in state 216, the opening of the heating passage can be controlled by controlling the first valve. The first valve and the second valve can be used to quickly open and close the heating passage and the cooling passage. The first valve and the second valve can be of split structure. In other examples, the first valve and the second valve can also be implemented as a single valve, for example, set at the divergence between the heating passage and the cooling passage, which should also be regarded as falling within the scope of protection of the present application.

[0049] In some embodiments of the present application, opening the refrigeration path in state 206 includes opening the condenser. It is recorded above that if the variable frequency compressor is turned off in the heating state, the refrigeration path is opened while keeping the heating path open, so that the output pressure of the variable frequency compressor can be released through two paths. On this basis, if the condenser is further opened, the high-temperature and high-pressure fluid output by the variable frequency compressor can be cooled, thereby further releasing the output pressure of the variable frequency compressor. In some embodiments of the present application, the condenser is also provided with a condenser fan, and opening the refrigeration path in state 206 also includes opening the condenser fan. The opening of the condenser fan will improve the heat dissipation efficiency of the condenser, thereby further releasing the output pressure of the variable frequency compressor.

[0050] See also Figure 5 , as shown by the dotted line in the figure, no matter whether the shutdown command is received in the heating state or the heating state, the speed, current and pressure ratio of the variable frequency compressor will eventually stabilize. At this time, both the cooling path and the heating path are in the open state, which is not conducive to the next startup of the temperature control system. Generally speaking, the temperature control system always sets a default working mode (for example, cooling mode, heating mode). Unless manually changed, the temperature control system should maintain the working mode before shutdown when it is started next time.

[0051] Figure 3 The corresponding embodiment is Figure 2 The following mechanism is also introduced on the basis of the corresponding embodiments. In some embodiments of the present application, the temperature control system is in the heating state before shutdown. In order to quickly release the pressure, the temperature control system opens the cooling path when receiving the shutdown command. In order to keep the temperature control system working in the heating state when it is turned on next time, Figure 3As shown, it can be determined in step 308 whether the refrigeration path has been opened for a first predetermined time. If the refrigeration path has been opened for the first predetermined time, the refrigeration path is closed and the process enters the end state 300. The first predetermined time can be selected based on actual experience. For example, after introducing the dual-path mechanism described above, the state of the variable-frequency compressor stabilizes within 7 seconds, and the refrigeration path can be closed after 7 seconds. The first predetermined time can also be a relatively long set time, such as 1 minute, which can fully ensure that the variable-frequency compressor is in a stable state.

[0052] Another criterion for measuring whether the variable-frequency compressor has stabilized is the current on the variable-frequency compressor. When the current on the variable-frequency compressor is zero, it can fully ensure that the variable-frequency compressor is in a stable state. Therefore, it can be determined in step 308 whether the current on the variable-frequency compressor is zero. If the current on the variable-frequency compressor is zero, the refrigeration path is closed and the process enters the end state 300.

[0053] Another criterion for measuring whether the variable-frequency compressor has stabilized is the pressure ratio of the variable-frequency compressor. When the pressure ratio of the variable-frequency compressor is lower than a threshold set according to experience, it can be determined that the variable-frequency compressor is basically in a stable state. Therefore, it can be determined in step 308 whether the pressure ratio of the variable-frequency compressor is lower than the first threshold. If the pressure ratio of the variable-frequency compressor is lower than the first threshold, the refrigeration path is closed and the process enters the end state 300.

[0054] The above criteria for determining whether the variable-frequency compressor has stabilized or is basically stable can be used alone or in combination. In step 308, it can be determined based on at least one of these criteria when to close the refrigeration path and enter the end state 300. The measurement of current and pressure (ratio) can utilize existing components in the temperature regulation system or introduce new sensor devices. In addition, the above describes when to close the temporarily opened refrigeration path, but does not limit whether to close the heating path and when to close the heating path. Whether to close the heating path can be set according to the prior art, and the closing timing can also adopt the closing conditions of the refrigeration path.

[0055] In some embodiments of the present application, before shutdown, the temperature regulation system is in the refrigeration state. In order to quickly relieve pressure, the temperature regulation system opens the heating path when receiving the shutdown command. In order to ensure that the temperature regulation system can still work in the refrigeration state when starting up next time, as Figure 3As shown, it can be determined in step 318 whether the heating path has been turned on for a second predetermined time. If the heating path has been turned on for the second predetermined time, the heating path is closed and the process enters the end state 300. The second predetermined time can be selected based on actual experience. For example, after introducing the dual-path mechanism mentioned above, the state of the variable-frequency compressor stabilizes within 6 seconds, and the heating path can be closed after 6 seconds. The second predetermined time can also be set to a relatively long time, such as 1 minute, which can fully ensure that the variable-frequency compressor is in a stable state. It should be noted that the values of the above first predetermined time and second predetermined time may be the same or different, and the present invention does not limit this here.

[0056] Another criterion for measuring whether the variable-frequency compressor has stabilized is the current on the variable-frequency compressor. When the current on the variable-frequency compressor is zero, it can fully ensure that the variable-frequency compressor is in a stable state. Therefore, it can be determined in step 318 whether the current on the variable-frequency compressor is zero. If the current on the variable-frequency compressor is zero, the heating path is closed and the process enters the end state 300.

[0057] Another criterion for measuring whether the variable-frequency compressor has stabilized is the pressure ratio of the variable-frequency compressor. When the pressure ratio of the variable-frequency compressor is lower than the threshold value set according to experience, it can be determined that the variable-frequency compressor is basically in a stable state. Therefore, it can be determined in step 318 whether the pressure ratio of the variable-frequency compressor is lower than the second threshold value. If the pressure ratio of the variable-frequency compressor is lower than the second threshold value, the heating path is closed and the process enters the end state 300. It should be noted that the values of the above first threshold value and second threshold value may be the same or different, and the present invention does not limit this here.

[0058] The above criteria for determining whether the variable-frequency compressor has stabilized or is basically stable can be used alone or in combination. In step 318, it can be determined based on at least one of these criteria when to close the heating path and enter the end state 300. The measurement of current and pressure (ratio) can utilize existing components in the temperature control system or introduce new sensor devices. In addition, the above describes when to close the temporarily opened heating path, but does not limit whether to close the cooling path and when to close the cooling path. Whether to close the cooling path can be set according to the prior art, and the closing timing can also adopt the closing conditions of the heating path.

[0059] According to another aspect of the present application, there is provided a computer-readable storage medium storing instructions that, when executed by a processor, cause the processor to perform any of the temperature adjustment methods described above. The computer-readable medium referred to in the present application includes various types of computer storage media and can be any available medium accessible by a general or special-purpose computer. For example, the computer-readable medium may include RAM, ROM, EPROM, E2PROM, registers, hard disks, removable disks, CD-ROMs or other optical disk memories, magnetic disk memories or other magnetic storage devices, or any other transient or non-transient medium capable of carrying or storing desired program code units in the form of instructions or data structures and accessible by a general or special-purpose computer or a general or special-purpose processor. As used herein, disks typically magnetically replicate data, while discs optically replicate data with a laser. The above combinations should also be included within the scope of protection of the computer-readable medium. An exemplary storage medium is coupled to the processor such that the processor can read from / write to the storage medium. In an alternative, the storage medium may be integrated into the processor. The processor and the storage medium may reside in an ASIC. The ASIC may reside in a user terminal. In an alternative, the processor and the storage medium may reside in the user terminal as discrete components.

[0060] The above are only specific embodiments of the present application, but the scope of protection of the present application is not limited thereto. Those skilled in the art can think of other feasible changes or substitutions based on the technical scope disclosed in the present application, and such changes or substitutions are all covered by the scope of protection of the present application. Without conflict, the embodiments of the present application and the features in the embodiments can also be combined with each other. The scope of protection of the present application shall be subject to the content recorded in the claims.

Claims

1. A temperature regulation system, comprising a variable frequency compressor, an evaporator, and a condenser, wherein: The variable frequency compressor is configured to flow the compressed fluid generated in the heating state to the evaporator via a heating passage, and to flow the compressed fluid generated in the cooling state to the condenser via a cooling passage; If the variable frequency compressor is turned off in the heating state, the heating passage remains open while the cooling passage is configured to be opened until the variable frequency compressor has reached a stable state; and If the variable frequency compressor is turned off in the cooling state, the cooling passage remains open while the heating passage is configured to be opened until the variable frequency compressor has reached a stable state.

2. The system according to claim 1, wherein the heating passage includes a first valve configured to control the opening of the heating passage; and The cooling passage includes a second valve configured to control the opening of the cooling passage.

3. The system according to claim 1, wherein the opening of the cooling passage includes the opening of the condenser.

4. The system according to claim 3, further comprising a condenser fan, and the opening of the cooling passage further includes the opening of the condenser fan.

5. The system according to claim 1, wherein the cooling passage is closed after being opened for a first predetermined time; The cooling passage is closed until the current on the variable frequency compressor is zero; and / or The cooling passage is closed until the pressure ratio of the variable frequency compressor is lower than a first threshold.

6. The system according to claim 1, wherein the heating passage is closed after being opened for a second predetermined time; The heating passage is closed until the current on the variable frequency compressor is zero; and / or The heating passage is closed until the pressure ratio of the variable frequency compressor is lower than a second threshold.

7. The system according to claim 1, wherein the system is a vehicle-mounted temperature regulation system.

8. A temperature regulation method, comprising: In the heating state, the compressed fluid generated by the variable frequency compressor flows to the evaporator via a heating passage; In the cooling state, the compressed fluid generated by the variable frequency compressor flows to the condenser via a cooling passage; In the heating state, if the variable frequency compressor is turned off, the heating passage is kept open while the cooling passage is opened until the variable frequency compressor has reached a stable state; and In the cooling state, if the variable frequency compressor is turned off, the cooling passage is kept open while the heating passage is opened until the variable frequency compressor has reached a stable state.

9. The method according to claim 8, wherein the heating passage includes a first valve and the cooling passage includes a second valve, wherein: The opening of the heating passage is controlled by controlling the first valve; and The opening of the cooling passage is controlled by controlling the second valve.

10. The method according to claim 8, wherein opening the cooling passage includes opening the condenser.

11. The method according to claim 10, wherein the condenser is further provided with a condenser fan, and opening the cooling passage further includes opening the condenser fan.

12. According to the method described in claim 8, close the refrigeration path after opening the refrigeration path for a first predetermined time; open the refrigeration path until the current on the variable frequency compressor is zero and then close the refrigeration path; and / or Open the refrigeration path until the pressure ratio of the variable frequency compressor is lower than a first threshold and then close the refrigeration path.

13. According to the method described in claim 8, close the heating path after opening the heating path for a second predetermined time; open the heating path until the current on the variable frequency compressor is zero and then close the heating path; and / or Open the heating path until the pressure ratio of the variable frequency compressor is lower than a second threshold and then close the heating path.

14. A computer-readable storage medium, in which instructions are stored, characterized in that, when the instructions are executed by a processor, the processor is caused to execute the method according to any one of claims 8-13.

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