An active and passive heat dissipation integrated system and an intelligent control method thereof

Abstract

The application belongs to the technical field of refrigeration and heat dissipation, and particularly relates to a main and passive heat dissipation integrated system and an intelligent control method thereof, which comprises a condenser, a throttle valve, an evaporator, a compressor, a main pipeline, a liquid storage branch, a first bypass connected in parallel with the throttle valve, a second bypass connected in parallel with the compressor, and a third bypass connecting the first bypass and the second bypass; the system switches operation modes by selectively closing and starting the first bypass, the second bypass, the third bypass and the liquid storage branch; in the main and passive heat dissipation integrated system and the intelligent control method thereof, a suitable operation mode can be matched in real time according to cooling needs; on this basis, the total amount of refrigerant in the system can be dynamically adjusted according to the operation state of the system during system operation, so that the system can always operate in a suitable state, and the operation stability and refrigeration efficiency of the system can be improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of refrigeration and heat dissipation, and particularly relates to a main and passive heat dissipation integrated system and an intelligent control method thereof. BACKGROUND

[0002] Active heat transfer refers to a non-spontaneous refrigeration cycle heat transfer. Taking an air conditioner as an example, the working principle of the air conditioner compressor is a vapor compression refrigeration cycle, and the core task thereof is to suck low-pressure and low-temperature refrigerant gas and then compress it into high-pressure and high-temperature gas through mechanical movement. This process enables the refrigerant to release more heat and provides power for the refrigeration cycle. More specifically, the working of the air conditioner compressor can be divided into four steps: adiabatic compression, condensation, throttling and evaporation. In the adiabatic compression stage, electric energy does mechanical work, and the refrigerant is compressed in the compressor, at which time the temperature of the refrigerant rises and the pressure increases. Then, the high-temperature and high-pressure gaseous refrigerant enters the condenser to release heat, changes from gas to liquid, and becomes high-pressure liquid refrigerant. Next, after throttling through an expansion valve or a throttle valve, the refrigerant becomes low-pressure and low-temperature liquid or gas-liquid two-phase state. Finally, the refrigerant enters the evaporator to absorb heat and evaporate, thereby cooling the surrounding air or water. This process is a non-spontaneous refrigeration cycle, which can cause heat transfer from a low-temperature object to a high-temperature object. In general, when the air conditioner compressor is working, it continuously absorbs heat from the low-pressure end to the refrigerant and then sends it to the high-pressure end to be distributed to the air, thereby continuously adjusting the air temperature.

[0003] Corresponding to the active heat transfer is the passive heat transfer, and a heat pipe system is a kind of passive heat management system. The working principle thereof is mainly based on physical phenomena such as heat conduction and the rapid heat transfer properties of liquid. It fully utilizes the heat conduction principle and the rapid heat transfer properties of the refrigerant, and rapidly transfers the heat of the heat-generating object to the heat source through the heat pipe, and the heat conduction capacity thereof even exceeds that of any known metal. The essence of the gravity heat pipe is a closed pipe, one end of which is heated and the other end is cooled, and the working fluid is filled in the closed pipe. When one end of the pipe is heated, the liquid will evaporate into gas after absorbing heat, and the saturated vapor will flow to the cold end, condense and release heat. Then, the condensed liquid returns to the hot end under the action of gravity, absorbs heat again and evaporates. In this way, continuous heat transfer from the heat source to the cold source is achieved.

[0004] At present, the number of base stations, cabinets and shelters increases year by year, and a large number of heat generating equipment needs to be cooled all year round. If the cooling is completely relied on the air conditioning system, the air conditioning compressor needs to run for a long time, and the energy consumption is large. In order to realize the energy saving and emission reduction of the air conditioning system at present, in addition to improving the energy efficiency ratio of the air conditioning system itself, it is to reduce the running time of the air conditioning compressor and try to use natural cold source, so that the refrigeration system combined with air conditioning mode and heat pipe mode appears.

[0005] The Chinese patent with publication (announcement) No. CN105423656B provides a kind of refrigeration system and its control method, the refrigeration system includes compressor, condenser, refrigerant pump, throttling device and evaporator.The compressor gas inlet and exhaust port are connected with the compressor bypass pipeline of selective bypass compressor, the both ends of condenser are connected with the exhaust port of compressor and the first pump port of refrigerant pump respectively, the first pump port and the second pump port of refrigerant pump are connected with the refrigerant pump bypass pipeline of selective bypass refrigerant pump;The first port and the second port of throttling device are connected with the throttling device bypass pipeline of selective bypass throttling device, and the first port is connected with the second pump port;The both ends of evaporator are connected with the second port of throttling device and the gas inlet of compressor respectively.According to the refrigeration system of the application, different refrigerant flow paths can be selected for work under different environmental temperatures, so as to maximize the use of natural cold source and greatly reduce the energy consumption of refrigeration system.

[0006] But in actual use, the refrigerant charge rate of the air conditioning system working in the heat pipe system mode is very different from that working in the compressor mode. Generally speaking, the optimal working quality of the heat pipe system mode is 1-2 times that of the compressor mode, so direct mode switching will cause the two systems to be unable to operate at the optimal working point. In view of the mismatch of the optimal charge rate of the working medium of the composite system, the applicant's earlier patent application with publication (announcement) number CN117588861A provides a main and passive heat dissipation integrated system based on pressure difference adaptive matching of working medium and a control method thereof. The main and passive heat dissipation integrated system based on pressure difference adaptive matching of working medium comprises: a main pipeline, which comprises a compressor, a condenser, a throttling element and an evaporator connected in sequence by a pipeline and forming a closed cycle, and a first bypass connected in parallel with the throttling element and a second bypass connected in parallel with the compressor; and a controller capable of selectively closing and starting the first bypass and the second bypass to switch the integrated system between the compressor mode and the heat pipe mode. In addition, the main and passive heat dissipation integrated system based on pressure difference adaptive matching of working medium further comprises a liquid storage branch, which comprises a liquid storage tank and a valve unit. The liquid storage branch is connected with the outlet of the condenser, and the liquid storage tank is installed on the liquid storage branch interface of the main pipeline through the valve unit. The controller can control the valve unit to open and close, thereby controlling the liquid storage tank to be able to store working medium inward or release working medium outward according to the working medium pressure in the main pipeline in the compressor mode and the heat pipe mode. This main and passive heat dissipation integrated system based on pressure difference adaptive matching of working medium can adjust the charge amount of the refrigerant according to the operating state of the system. For example, when the compressor is running, the high-pressure working medium coming out of the condenser can enter the liquid storage tank, and the valve is closed after a predetermined amount is charged. When switching to the heat pipe, the pressure in the main pipeline will be lower, at which time the valve unit is opened to release the high-pressure working medium, and the setting of the liquid storage tank allows the working quality of the two modes to be in the best state and better match the corresponding mode.

[0007] However, the main and passive heat dissipation integrated system based on pressure difference adaptive matching of working medium and the control method thereof still have the following defects:

[0008] Firstly, the main and passive heat dissipation integrated system based on pressure difference adaptive matching of working medium has poor stable operation capability in the active heat dissipation mode, especially when the environmental temperature is higher than 50℃, it is difficult to operate stably, the refrigeration capacity is poor, and the heat dissipation capacity for the heat generating object is poor.

[0009] Second, the early patent application with publication (announcement) number CN117588861A only provides a control strategy of a system, which, through a liquid storage tank, orders the system to charge the working medium to the main pipeline according to the optimal charging rate of the heat pipe mode in the heat pipe mode; or orders the system to store the working medium in the main pipeline into the liquid storage tank according to the optimal charging rate of the compressor mode in the compressor mode; however, as for when the system operates in the heat pipe mode and when it switches to the compressor mode, the system only selects the way through the indoor and outdoor temperatures and the indoor and outdoor temperature difference, which is slightly rough in the actual application process, and the control of the charging amount of the refrigerant under different operating states of the system is not accurate enough.

[0010] If a main and passive heat dissipation integrated system and an intelligent control method thereof, which can stably operate in a high-temperature environment and accurately control and switch the operating state of the system, can be provided, the application range of the heat dissipation system will be further improved, and the energy-saving and efficient effect will be further realized. SUMMARY

[0011] The purpose of the present application is to provide a main and passive heat dissipation integrated system and an intelligent control method thereof, which can stably operate in a high-temperature environment and accurately control and switch the operating state of the system, further improve the application range of the heat dissipation system, and realize the energy-saving and efficient effect.

[0012] Therefore, the present application provides a main and passive heat dissipation integrated system, which comprises:

[0013] A condenser, a throttling valve, an evaporator, a compressor and a main pipeline, the main pipeline sequentially connects the condenser, the throttling valve, the evaporator and the compressor and forms a closed loop; a liquid storage branch is arranged on the main pipeline, the liquid storage branch comprises a liquid storage tank and an electromagnetic valve, the liquid storage tank is connected with the main pipeline through the electromagnetic valve, and a connection point of the liquid storage branch and the main pipeline is located between the condenser and the throttling valve;

[0014] and,

[0015] A first bypass parallel to the throttling valve;

[0016] A second bypass parallel to the compressor;

[0017] and, a third bypass connecting the first bypass and the second bypass;

[0018] In addition, the main and passive heat dissipation integrated system further comprises a controller which can selectively close and start the first bypass, the second bypass, the third bypass and the liquid storage branch to switch the operating mode of the main and passive heat dissipation integrated system.

[0019] Further, the active and passive heat dissipation integrated system further comprises:

[0020] a first three-way valve arranged at a connection point of the second bypass and the main pipeline, the first three-way valve being located on the main pipeline between the condenser and the compressor;

[0021] a multi-way control valve arranged at a connection point of the first bypass and the main pipeline, the multi-way control valve being located on the main pipeline between the condenser and the throttling valve;

[0022] a second three-way valve arranged at a connection point of the third bypass and the first bypass;

[0023] the first three-way valve, the multi-way control valve, the second three-way valve and the electromagnetic valve are respectively connected with the controller, so that the controller can switch the operation mode of the active and passive heat dissipation integrated system by controlling the first three-way valve, the multi-way control valve, the second three-way valve and the electromagnetic valve.

[0024] Further, the second three-way valve is located in the middle of the first bypass and divides the first bypass into an upper pipeline and a lower pipeline; the liquid storage branch is located on the main pipeline between the multi-way control valve and the condenser.

[0025] Further, in the active and passive heat dissipation integrated system, the controller switches the following modes by controlling the first three-way valve, the multi-way control valve and the second three-way valve:

[0026] high-temperature refrigeration mode: in this mode, the first three-way valve connects the main pipeline between the compressor and the condenser, and the second bypass is disconnected; the three ports of the multi-way control valve are all opened to connect the main pipeline between the condenser and the throttling valve, and at the same time, the first bypass and the main pipeline are connected; the second three-way valve connects the upper pipeline of the first bypass and the third bypass, so that the upper pipeline of the first bypass and the third bypass are connected, and the upper pipeline and the lower pipeline of the first bypass are disconnected;

[0027] ordinary refrigeration mode: in this mode, the first three-way valve connects the main pipeline between the compressor and the condenser, and the second bypass is disconnected; the multi-way control valve connects the main pipeline between the condenser and the throttling valve, and the first bypass is disconnected; the second three-way valve connects the upper pipeline and the lower pipeline of the first bypass, and the third bypass is disconnected;

[0028] Heat pipe mode: in this mode, the first three-way valve is opened with the port connected with the second bypass and the condenser, and the port connected with the compressor is disconnected, so that the second bypass and the main pipeline are communicated, and the compressor and the condenser are disconnected; the multi-way control valve is opened with the port connected with the condenser and the first bypass, and the port connected with the throttle valve is disconnected, so that the first bypass and the main pipeline are communicated, and the throttle valve and the condenser are disconnected; the second three-way valve communicates the upper pipeline and the lower pipeline of the first bypass, and the third bypass is disconnected.

[0029] Further, the liquid storage tank can quantitatively suck the refrigerant in the main pipeline, or inject a set amount of refrigerant into the main pipeline.

[0030] An intelligent control method of an active and passive heat dissipation integrated system, the intelligent control method is used for the active and passive heat dissipation integrated system, and the intelligent control method comprises the following steps:

[0031] S1, before the system is started, the surface temperature T 表 of the heat dissipation element and the ambient temperature T 环 are detected, and the difference ΔT1 between them is calculated, ΔT1 = T 表 -T 环 ;

[0032] S2, according to the relative size of ΔT1 and a preset threshold T 阈1 , the starting mode of the system is determined;

[0033] S3, during the system operation, the current operation mode and the exhaust pressure P 排 of the system are measured every set time Δt, and the operation state of the system is controlled according to the relative size of P 排 , a preset threshold P 阈1 or P 阈2 .

[0034] Further, the step S2 comprises:

[0035] S21, the relative size of ΔT1 and a preset threshold T 阈1 is compared:

[0036] if ΔT1 ≤ T 阈1 , the system operates in a heat pipe mode;

[0037] if ΔT1 > T 阈1 , step S22 is continued;

[0038] S22, the relative size of T 环 and a preset threshold T 阈2 is judged:

[0039] If T 环 ≤ T 阈2 , the system runs in normal refrigeration mode;

[0040] If T 环 > T 阈2 , the system runs in high-temperature refrigeration mode.

[0041] Further, the step S3 comprises:

[0042] S31, during the operation of the system, the current operation mode of the system is detected every set time △t, and the exhaust pressure P 排 of the system is measured;

[0043] S32, according to the relative size of P 排 , P 阈1 or P 阈2 , the operation state of the system is regulated:

[0044] If the system operation mode is high-temperature refrigeration mode or normal refrigeration mode, P 排 is compared with the preset threshold P 阈1 : if the system exhaust pressure P 排 ≤ P 阈1 , the system continues to run in the current mode; if the system exhaust pressure P 排 > P 阈1 , step S33 needs to be continued to execute;

[0045] If the system operation mode is heat pipe mode, P 排 is compared with the preset threshold P 阈2 : if the system exhaust pressure P 排 ≤ P 阈2 , the system continues to run in the current mode; if the system exhaust pressure P 排 > P 阈2 , the system switches to normal refrigeration mode;

[0046] S33, according to the relative size of the exhaust superheat T 排气过热度 of the compressor, the preset threshold T 阈3 and T 阈4 , the operation state of the system is regulated.

[0047] Further, the step S33 comprises:

[0048] S331, the exhaust superheat T 排气过热度 of the compressor 3 is measured, and it is compared with the preset threshold T 阈3 and T 阈4 , wherein T 阈3 < T 阈4 :

[0049] If T 阈3 ≤ T 排气过热度 ≤ T 阈4 , the system keeps the current operation mode running;

[0050] If T 排气过热度 < T 阈3 , the system keeps the current operation mode running, and opens the electromagnetic valve to inject refrigerant with mass △m into the storage tank;

[0051] If T 排气过热度 > T 阈4 , the step S332 is continuously executed;

[0052] S332, according to the back gas superheat degree T 回气过热度 of the compressor, the relative size of the preset threshold T 阈5 and T 阈6 is compared to regulate the operation state of the system.

[0053] Further, the step S332 comprises:

[0054] The back gas superheat degree T 回气过热度 of the compressor is measured and compared with the preset threshold T 阈5 and T 阈6 , wherein T 阈5 < T 阈6 :

[0055] If T 阈5 ≤ T 回气过热度 ≤ T 阈6 , the system keeps the current operation mode running;

[0056] If T 回气过热度 < T 阈5 , the system keeps the current operation mode running, and opens the electromagnetic valve to inject refrigerant with mass △m into the storage tank;

[0057] If T 回气过热度 > T 阈6 , the system keeps the current operation mode running, and opens the electromagnetic valve to inject refrigerant with mass △m into the storage tank.

[0058] The beneficial effects of the present application are:

[0059] In the active and passive heat dissipation integrated system and the intelligent control method thereof, the operation mode can be matched in real time according to the cooling requirement; on this basis, the total amount of refrigerant in the system can be dynamically adjusted according to the operation state of the system during the operation of the system, so that the system can always be operated in a suitable state, and the operation stability and the refrigeration efficiency of the system can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0060] Figure 1 is a structural schematic diagram of the active and passive heat dissipation integrated system according to the present application;

[0061] The marks in the figure represent:

[0062] 1, condenser; 2, evaporator; 3, compressor; 4, liquid storage tank; 5, throttling valve; 6, first bypass; 7, second bypass; 8, electromagnetic valve; 9, first three-way valve; 10, multi-way control valve; 11, second three-way valve; 12, third bypass. DETAILED DESCRIPTION

[0063] The technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art belong to the scope of protection of the present application.

[0064] In the description of the present application, it should be noted that the terms used herein are only used to describe the specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For the convenience of description, the sizes of the parts shown in the drawings are not drawn according to the actual proportional relationship. The technologies, methods and devices known to those skilled in the art can not be discussed in detail, but should be considered as part of the authorized description. In all examples shown and discussed herein, any specific value should be interpreted as merely exemplary, and not as a limitation. Therefore, other examples of exemplary embodiments can have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0065] It should be noted that the terms "first", "second", and the like in the description and in the claims of the present application are used for distinguishing between similar objects and not necessarily for describing a specific sequential or chronological order. It is to be understood that the use of such terms is interchangeable under appropriate circumstances such that the embodiments of the present application described herein are capable of operation in other sequences than those illustrated or otherwise described herein. The terms "first", "second", and the like, when used in the description and in the claims of the present application, are not necessarily used consistently in all contexts to designate the same ordinal numbers, such that the incremental use of such terms can not necessarily precede or follow any other terms in the same context. Terms such as "and / or", "at least one of", and the like, when used in the foregoing description, are used to associate together alternatively-related aspects, such that, any one aspect used in conjunction with any other aspect is an aspect of the application. Any aspect can be additionally provided in any combination, including with respect to any other aspect, that is not otherwise provided herein. Also, as used in the description herein and throughout the claims that follow, the meaning of "if" includes "when" such that if A if B includes both A when B and A when not B. The meaning of "if" also includes "only if" such that if A if B includes both A when B and not A when not B.

[0066] It should be noted that, in the present application, the terms "comprising", "containing" or any other similar words are intended to encompass non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or other elements inherent to such a process, method, article or device. Without more limitations, the element defined by the phrase "including a" does not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be noted that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, but can also include performing functions in a substantially simultaneous manner or in reverse order, for example, the described method can be performed in an order different from that described, and various steps can also be added, omitted, or combined. In addition, the features described with reference to certain examples can be combined in other examples.

[0067] A passive and active heat dissipation integrated system, comprising:

[0068] A condenser 1, a throttle valve 5, an evaporator 2, a compressor 3, and a main pipeline, the main pipeline sequentially connecting the condenser 1, the throttle valve 5, the evaporator 2, and the compressor 3 and forming a closed loop; a liquid storage branch is arranged on the main pipeline, the liquid storage branch comprising a liquid storage tank 4 and an electromagnetic valve 8, the liquid storage tank 4 being connected with the main pipeline through the electromagnetic valve 8, and a connection point of the liquid storage branch with the main pipeline being located between the condenser 1 and the throttle valve 5;

[0069] and,

[0070] A first bypass 6 connected in parallel with the throttle valve 5;

[0071] A second bypass 7 connected in parallel with the compressor 3;

[0072] and, a third bypass 12 connecting the first bypass 6 and the second bypass 7;

[0073] Further, the active and passive heat dissipation integrated system further comprises a controller which selectively closes and opens the first bypass 6, the second bypass 7, the third bypass 12 and the liquid storage branch to switch the operation mode of the active and passive heat dissipation integrated system.

[0074] Further, the active and passive heat dissipation integrated system further comprises:

[0075] a first three-way valve 9 which is arranged at the connection point of the second bypass 7 and the main pipeline, and which is located on the main pipeline between the condenser 1 and the compressor 3;

[0076] a multi-way control valve 10 which is arranged at the connection point of the first bypass 6 and the main pipeline, and which is located on the main pipeline between the condenser 1 and the throttle valve 5;

[0077] a second three-way valve 11 which is arranged at the connection point of the third bypass 12 and the first bypass 6;

[0078] The first three-way valve 9, the multi-way control valve 10, the second three-way valve 11 and the electromagnetic valve 8 are respectively connected with the controller, so that the controller can switch the operation mode of the active and passive heat dissipation integrated system by controlling the first three-way valve 9, the multi-way control valve 10, the second three-way valve 11 and the electromagnetic valve 8.

[0079] Preferably, the second three-way valve 11 is located in the middle of the first bypass 6 and divides the first bypass 6 into an upper pipeline and a lower pipeline, and the second three-way valve 11 can control the connection and disconnection between the upper pipeline and the lower pipeline in the first bypass 6.

[0080] Further, the liquid storage branch is located on the main pipeline between the multi-way control valve 10 and the condenser 1.

[0081] It is no doubt for those skilled in the art that the installation height of the condenser 1 should be higher than that of the evaporator 2 to meet the operation requirement of the heat pipe system.

[0082] Specifically, in the active and passive heat dissipation integrated system, the controller can switch the operation mode by controlling the first three-way valve 9, the multi-way control valve 10 and the second three-way valve 11 as follows:

[0083] High temperature refrigeration mode: in this mode, the first three-way valve 9 connects the main pipeline between the compressor 3 and the condenser 1, and the second bypass 7 is disconnected; the three ports of the multi-way control valve 10 are all opened, connecting the main pipeline between the condenser 1 and the throttling valve 5, and connecting the first bypass 6 and the main pipeline at the same time; the second three-way valve 11 connects the upper pipeline of the first bypass 6 and the third bypass 12, so that the upper pipeline of the first bypass 6 and the third bypass 12 are connected, and the upper pipeline and the lower pipeline of the first bypass 6 are disconnected;

[0084] At this time, the refrigerant discharged from the exhaust port of the compressor 3 can enter the condenser 1 through the first three-way valve 9, and then be divided into two parts at the multi-way control valve 10, the first part being in the main pipeline, entering the compressor 3 after the throttling valve 5 and the evaporator 2; the second part enters the third bypass 12 through the upper pipeline of the first bypass 6, and then enters the main pipeline through the lower pipeline of the second bypass 7, and then enters the compressor 3 after being combined with the first part of the refrigerant.

[0085] Normal refrigeration mode: in this mode, the first three-way valve 9 connects the main pipeline between the compressor 3 and the condenser 1, and the second bypass 7 is disconnected; the multi-way control valve 10 connects the main pipeline between the condenser 1 and the throttling valve 5, and the first bypass 6 is disconnected; the second three-way valve 11 connects the upper pipeline and the lower pipeline of the first bypass 6, and the third bypass 12 is disconnected;

[0086] At this time, the refrigerant discharged from the exhaust port of the compressor 3 can enter the condenser 1 through the first three-way valve 9, and then pass through the multi-way control valve 10 in turn, the throttling valve 5 and the evaporator 2, and enter the compressor 3;

[0087] Heat pipe mode: in this mode, the first three-way valve 9 is opened at the ports connected with the second bypass 7 and the condenser 1, and is disconnected at the port connected with the compressor 3, so that the second bypass 7 and the main pipeline are connected, and the compressor 3 and the condenser 1 are disconnected; the multi-way control valve 10 is opened at the ports connected with the condenser 1 and the first bypass 6, and is disconnected at the port connected with the throttling valve 5, so that the first bypass 6 and the main pipeline are connected, and the throttling valve 5 and the condenser 1 are disconnected; the second three-way valve 11 connects the upper pipeline and the lower pipeline of the first bypass 6, and the third bypass 12 is disconnected;

[0088] At this time, the compressor 3 is closed, and the refrigerant discharged from the evaporator 2 enters the condenser 1 through the second bypass 7, and then enters the first bypass 6 through the multi-way control valve 10, and enters the evaporator 2 through the first bypass 6.

[0089] In the high-temperature refrigeration mode of the application, the refrigerant is divided into two parts, the first part enters the evaporator 2 after passing through the throttle valve 5, and the second part enters the third bypass 12 through the upper pipe of the first bypass 6, and then is combined with the refrigerant discharged from the evaporator 2 and enters the compressor 3 for compression. In this way, the operation reliability of the compressor can be improved, and the system can be ensured to operate stably and realize effective refrigeration in a high-temperature environment.

[0090] Further, the suction device or pressure automatic control device is arranged in the liquid storage tank 4, so as to realize the quantitative suction of the refrigerant in the main pipeline or the injection of the set amount of refrigerant into the main pipeline under the control of the controller.

[0091] In addition, the application also provides an intelligent control method of the active and passive heat dissipation integrated system, which comprises the following steps:

[0092] S1, before the system is started, the surface temperature T 表 of the heat dissipation element and the ambient temperature T 环 are detected, and the difference ΔT1 between the two is calculated, ΔT1=T 表 -T 环 ;

[0093] S2, according to the relative size of ΔT1 and the preset threshold T 阈1 , the starting mode of the system is determined;

[0094] S3, during the operation of the system, the current operation mode and the exhaust pressure P 排 of the system are measured every set time Δt, and the operation state of the system is controlled according to the relative size of P 排 and the preset threshold P 阈1 or P 阈2 .

[0095] Further, when the operation mode of the system is switched, the electromagnetic valve 8 is opened, and the liquid storage tank 4 quantitatively sucks the refrigerant in the main pipeline or injects the set amount of refrigerant into the main pipeline according to the need, so that the system can operate according to the optimal refrigerant charging amount in each mode.

[0096] As some examples of the application, when the active and passive heat dissipation integrated system is used in large settings such as base stations and shelters, T 表 in the step S1 can be the indoor temperature of the space where the heat dissipation element is located, and the ambient temperature T 环 can be the outdoor temperature.

[0097] Specifically, the step S2 comprises:

[0098] S21, compare ΔT1 and the preset threshold T阈1 the relative size of T

[0099] If ΔT1≤T 阈1 , the system runs in the heat pipe mode;

[0100] If ΔT1>T 阈1 , step S22 is executed continuously;

[0101] S22, judging the relative size of T 环 and a preset threshold T 阈2

[0102] If T 环 ≤T 阈2 , the system runs in the normal refrigeration mode;

[0103] If T 环 >T 阈2 , the system runs in the high-temperature refrigeration mode.

[0104] The values of the preset thresholds T 阈1 and T 阈2 may be set according to experiments or experience.

[0105] As some examples of the present application, the value of the preset threshold T 阈1 is 10-30℃, and the value of the preset threshold T 阈2 is 50-60℃.

[0106] Further, the step S3 comprises:

[0107] S31, detecting the current running mode of the system every set time interval Δt during the running of the system, and measuring the exhaust pressure P 排 of the system;

[0108] S32, controlling the running state of the system according to the relative size of P 排 and a preset threshold P 阈1 or P 阈2 , wherein P 阈1 >P 阈2 , and the values of P 阈1 and P 阈2 are determined by experiments or the like:

[0109] If the running mode of the system is the high-temperature refrigeration mode or the normal refrigeration mode, P 排 is compared with the preset threshold P 阈1 : if the exhaust pressure P 排 of the system is less than or equal to P 阈1 , the system continues to run in the current mode; if the exhaust pressure P 排 of the system is greater than P 阈1 , the system runs in the high-temperature refrigeration mode.If so, then step S33 needs to be executed.

[0110] If the system is operating in heat pipe mode, then P 排 With preset threshold P 阈2 Compare: If the system exhaust pressure P 排 ≤P 阈2 If the system exhaust pressure P 排 >P 阈2 If so, the system will switch to normal cooling mode.

[0111] S33, based on the exhaust superheat T of compressor 3 排气过热度 With preset threshold T 阈3 and T 阈4 The relative size of the system regulates its operating state.

[0112] Furthermore, step S33 includes:

[0113] S331, for the exhaust superheat T of compressor 3 排气过热度 Perform the measurement and compare it with a preset threshold T. 阈3 and T 阈4 For comparison, T 阈3 <T 阈4 T 阈3 T 阈4 The value is determined through experiments and other methods:

[0114] If T 阈3 ≤T 排气过热度 ≤T 阈4 If the system continues to operate in the current mode, the total amount of refrigerant in the main pipeline will remain unchanged.

[0115] If T 排气过热度 <T 阈3 If the system continues to operate in the current mode, it will open the solenoid valve 8 and inject a refrigerant with a mass of Δm into the liquid storage tank 4.

[0116] If T 排气过热度 >T 阈4 If so, continue with step S332;

[0117] S332, based on the return gas superheat T of compressor 3 回气过热度 With the preset threshold T 阈5 and T 阈6 The relative size of the system regulates its operating state.

[0118] Furthermore, step S332 includes:

[0119] Superheat T of return gas for compressor 3 回气过热度The measurement is compared with a preset threshold T 阈5 and T 阈6 are compared, wherein T 阈5 <T 阈6 , T 阈5 , T 阈5 are determined by experiments or the like:

[0120] If T 阈5 ≤ T 回气过热度 ≤ T 阈6 , the system keeps running in the current mode, and the total amount of refrigerant in the main pipeline remains unchanged;

[0121] If T 回气过热度 <T 阈5 , the system keeps running in the current mode, and the electromagnetic valve 8 is opened to inject refrigerant with a mass of △m into the storage tank 4;

[0122] If T 回气过热度 >T 阈6 , the system keeps running in the current mode, and the electromagnetic valve 8 is opened to inject refrigerant with a mass of △m from the storage tank 4 into the main pipeline.

[0123] The value of △m can be determined by experiments or the like.

[0124] As some examples of the present application, in step S3, the value of the interval time △t can be 10-100s.

[0125] Further, the intelligent control method of the active and passive heat dissipation integrated system further comprises step S4: in the system running process, the running mode of the system is regulated again every set time.

[0126] It should be noted that in the present application, the time interval for executing step S4 is much larger than the time interval for executing step S3, and the purpose of executing step S3 is to make small adjustments to the running state of the system, mainly involving the adjustment of the total amount of refrigerant in the circulation pipeline; and the purpose of executing step S4 is to make large adjustments to the running state of the system, mainly involving the adjustment of the running mode of the system. Through the cooperation and adjustment of steps S3 and S4, dynamic adjustment of the running state of the system is achieved.

[0127] Specifically, step S4 comprises:

[0128] S41, in the system running process, the surface temperature T 表’ of the heat dissipation element and the ambient temperature T 环’ are detected again every set time, such as 10-30min, and the difference △T2 between the two is calculated, △T2=T 表’ -T环’ ;

[0129] S42, determining the start-up operation mode of the system according to the relative size of △T2 and the preset threshold T 阈7 .

[0130] Specifically, the step S42 comprises:

[0131] comparing the relative size of △T2 and the preset threshold T 阈7 .

[0132] If △T2≤T 阈7 , the system operates in the heat pipe mode;

[0133] If △T2>T 阈7 , the step S22 is continuously executed.

[0134] S22, judging the relative size of T 环’ and the preset threshold T 阈8 .

[0135] If T 环’ ≤T 阈8 , the system operates in the normal refrigeration mode;

[0136] If T 环’ >T 阈8 , the system operates in the high-temperature refrigeration mode.

[0137] The sizes of the preset thresholds T 阈7 , T 阈8 may be set according to experiments or experience.

[0138] As some examples of the present application, the value of the preset threshold T 阈7 is 5-20℃, and the value of the preset threshold T 阈8 is 55-65℃.

[0139] In the active and passive heat dissipation integrated system and the intelligent control method thereof, the appropriate operation mode can be matched in real time according to the cooling requirement; on this basis, the total amount of refrigerant in the system can be dynamically adjusted according to the operation state of the system during the operation of the system, so that the system can always operate in the appropriate state, and the operation stability and the refrigeration efficiency of the system can be improved.

[0140] The embodiments of the present application are described above with reference to the drawings, and the embodiments and features in the embodiments of the present application can be combined with each other without conflict, and the present application is not limited to the above-described specific embodiments, and the above-described specific embodiments are only illustrative but not restrictive, and a person of ordinary skill in the art can make many forms under the inspiration of the present application without departing from the purpose of the present application and the scope protected by the claims, and all belong to the protection of the present application.

Claims

1. An intelligent control method of an integrated system of active and passive heat dissipation, characterized in that, The active and passive heat dissipation integrated system comprises: a condenser (1), a throttle valve (5), an evaporator (2), a compressor (3) and a main pipeline, the main pipeline sequentially connects the condenser (1), the throttle valve (5), the evaporator (2) and the compressor (3) and forms a closed loop; a liquid storage branch is arranged on the main pipeline, the liquid storage branch comprises a liquid storage tank (4) and an electromagnetic valve (8), the liquid storage tank (4) is connected with the main pipeline through the electromagnetic valve (8), and a connection point of the liquid storage branch with the main pipeline is located between the condenser (1) and the throttle valve (5); and, a first bypass (6) connected in parallel with the throttle valve (5); a second bypass (7) connected in parallel with the compressor (3); and a third bypass (12) connecting the first bypass (6) and the second bypass (7); In addition, the active and passive heat dissipation integrated system further comprises a controller capable of selectively closing and starting the first bypass (6), the second bypass (7), the third bypass (12) and the liquid storage branch, so as to switch the operation mode of the active and passive heat dissipation integrated system; The intelligent control method comprises the following steps: S1, before the system is powered on, the surface temperature T of the heat dissipation element is detected 表 and the ambient temperature T 环 , and the difference ΔT1 between the two is calculated, ΔT1=T 表 -T 环 ; S2, determining the system startup mode according to the relative size of △T1 and the preset threshold T 阈1 . S3, during the system operation, every set time interval Δt, the current operation mode and exhaust pressure P of the system are measured 排 and according to P 排 and the preset threshold value P 阈1 or the relative size of P 阈2 , the operation state of the system is regulated; The step S3 comprises: S31, during the operation of the system, detecting the current operation mode of the system every set time interval At, and measuring the exhaust pressure P of the system 排 of the system; S32, according to P 排 the relative size of the preset threshold P 阈1 or P 阈2 regulates the running state of the system: If the system operating mode is high-temperature refrigeration mode or ordinary refrigeration mode, P 排 is compared with the preset threshold value P 阈1 . If the system exhaust pressure P 排 ≤ P 阈1 , the system continues to operate in the current mode; if the system exhaust pressure P 排 > P 阈1 , step S33 needs to be continued to execute. If the system operating mode is the heat pipe mode, P 排 is compared with the preset threshold value P 阈2 : if the system exhaust pressure P 排 ≤ P 阈2 , the system continues to operate in the current mode; if the system exhaust pressure P 排 > P 阈2 , the system switches to the normal refrigeration mode operation; S33, according to the exhaust gas superheat degree T of the compressor 排气过热度 with the preset threshold T 阈3 and the relative size of T 阈4 regulate the operating state of the system; The step S33 comprises: S331, the exhaust gas superheat degree T of the compressor 排气过热度 The measurement is performed and compared with a preset threshold T 阈3 and T 阈4 , wherein T 阈3 <T 阈4 : If T 阈3 ≤ T 排气过热度 ≤ T 阈4 , then the system remains in the current mode of operation. If T 排气过热度 If T 阈3 If T 阈3 If T 阈3 If T 阈3 If T 阈3 If T 阈3 If T 阈3 If T 阈3 If T 阈3 If T 阈3 If T 阈3 If T 阈3 If T If T 排气过热度 > T 阈4 then continue with step S332; S332, according to the return gas superheat T of the compressor 回气过热度 with the preset threshold T 阈5 and the relative size of T 阈6 regulate the operating state of the system; The step S332 comprises: the superheat T of the return gas to the compressor 回气过热度 The measurement is performed and compared with a preset threshold T 阈5 and T 阈6 where T 阈5 <T 阈6 : If T 阈5 ≤ T 回气过热度 ≤ T 阈6 , then the system remains in the current mode of operation. If T 回气过热度 If T 阈5 If T 阈5 If T 阈5 If T 阈5 If T 阈5 If T 阈5 If T 阈5 If T 阈5 If T 阈5 If T 阈5 If T 阈5 If T 阈5 If T If T 回气过热度 > T 阈6 , the system keeps the current operation mode running, and opens the electromagnetic valve to inject the refrigerant with mass △m from the storage tank into the main pipeline.

2. The intelligent control method of the active and passive heat dissipation integrated system according to claim 1, characterized in that, The active and passive heat dissipation integrated system further comprises: a first three-way valve (9) arranged at a connection point of the second bypass (7) and the main pipeline, the first three-way valve (9) being located on the main pipeline between the condenser (1) and the compressor (3); a multi-way control valve (10) arranged at a connection point of the first bypass (6) and the main pipeline, the multi-way control valve (10) being located on the main pipeline between the condenser (1) and the throttle valve (5); a second three-way valve (11) arranged at a connection point of the third bypass (12) and the first bypass (6); The first three-way valve (9), the multi-way control valve (10), the second three-way valve (11) and the electromagnetic valve (8) are respectively connected with the controller, so that the controller can switch the operation mode of the active and passive heat dissipation integrated system by controlling the first three-way valve (9), the multi-way control valve (10), the second three-way valve (11) and the electromagnetic valve (8).

3. The intelligent control method of the active and passive heat dissipation integrated system according to claim 2, characterized in that, The second three-way valve (11) is located in the middle of the first bypass (6) and divides the first bypass (6) into an upper pipeline and a lower pipeline; the liquid storage branch is located on the main pipeline between the multi-way control valve (10) and the condenser (1).

4. The intelligent control method of the active and passive heat dissipation integrated system according to claim 3, characterized in that, In the active and passive heat dissipation integrated system, the controller switches the following modes by controlling the first three-way valve (9), the multi-way control valve (10) and the second three-way valve (11): High-temperature refrigeration mode: in this mode, the first three-way valve (9) connects the main pipeline between the compressor (3) and the condenser (1), and the second bypass (7) is disconnected; all the three ports of the multi-way control valve (10) are opened, connecting the main pipeline between the condenser (1) and the throttle valve (5), and connecting the first bypass (6) and the main pipeline; the second three-way valve (11) connects the upper pipeline of the first bypass (6) and the third bypass (12), so that the upper pipeline of the first bypass (6) and the third bypass (12) are connected, and the upper pipeline and the lower pipeline of the first bypass (6) are disconnected; Normal refrigeration mode: in this mode, the first three-way valve (9) connects the main pipeline between the compressor (3) and the condenser (1), and the second bypass (7) is disconnected; the multi-way control valve (10) connects the main pipeline between the condenser (1) and the throttle valve (5), and the first bypass (6) is disconnected; the second three-way valve (11) connects the upper pipeline and the lower pipeline of the first bypass (6), and the third bypass (12) is disconnected; Heat pipe mode: in this mode, the first three-way valve (9) is opened at the port connected with the second bypass (7) and the condenser (1), and is disconnected at the port connected with the compressor (3), so that the second bypass (7) and the main pipeline are connected, and the compressor (3) and the condenser (1) are disconnected; the multi-way control valve (10) is opened at the port connected with the condenser (1) and the first bypass (6), and is disconnected at the port connected with the throttle valve (5), so that the first bypass (6) and the main pipeline are connected, and the throttle valve (5) and the condenser (1) are disconnected; the second three-way valve (11) connects the upper pipeline and the lower pipeline of the first bypass (6), and the third bypass (12) is disconnected.

5. The intelligent control method of the active and passive heat dissipation integrated system according to claim 1, wherein, The liquid storage tank (4) can quantitatively suck in the refrigerant in the main pipeline, or inject a set amount of refrigerant into the main pipeline.

6. The intelligent control method of the active and passive heat dissipation integrated system according to claim 1, wherein, The step S2 comprises: S21, compare the relative size of the ΔT1 and the preset threshold T 阈1 S21, compare the relative size of the ΔT1 and the preset threshold T If ΔΤ1≤ T 阈1 then the system operates in heat pipe mode; If ΔΤ1 > T 阈1 then continue with step S22; S22, judging T 环 and the relative size of the preset threshold T 阈2 ​ If T 环 ≤ T 阈2 , then the system operates in normal refrigeration mode; If T 环 > T 阈2 , the system operates in a high temperature refrigeration mode.

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