Temperature control system of heat guarantee device and locomotive

Abstract

The invention discloses a temperature control system for a heat guarantee device, and the system comprises a liquid cooling main path which is used for circulating a heat exchange fluid capable of achieving the heat exchange with a heat management object; the first heat exchange passage exchanges heat to the outside through an external heat exchanger; the second heat exchange passage exchanges heat to the outside through the compression refrigeration system; the valve equipment is used for adjusting the heat exchange fluid flow proportion between the first heat exchange passage and the second heat exchange passage; the pump set is used for driving heat exchange fluid in the liquid cooling main path to flow, the pump set comprises a first pump body and a second pump body which are connected in series and have the same driving direction, the first pump body and the second pump body can be started synchronously, and the first pump body and / or the second pump body can be started independently. The temperature control system of the heat guarantee device can effectively solve the problem that the heat exchange flow adaptation effect is poor after the heat exchange mode of the liquid cooling main circuit is changed. The invention further discloses a locomotive comprising the temperature control system.

Description

Technical Field

[0001] The present invention relates to the field of equipment, and more particularly to a temperature control system of a thermal protection device, and also to a locomotive comprising the temperature control system. Background Art

[0002] To maintain new energy locomotive power batteries within an appropriate operating temperature range, thermal management devices are required to ensure performance, safety, and extend battery life. Currently, liquid cooling technology is the primary method of thermal management for new energy locomotive power batteries. The main liquid cooling circuit uses both outdoor dry coolers and compression refrigeration systems to exchange heat externally. The two methods are then allocated based on the actual ambient temperature and heat exchange power requirements.

[0003] In the process of realizing the invention, the inventors found that there are at least the following problems in the prior art: Currently, due to the use of two heat exchange forms in the liquid cooling main circuit, when used in combination, the flow resistance will change, resulting in poor flow of the heat exchange fluid. Therefore, there is a problem of poor heat exchange flow adaptation effect after the heat exchange form of the liquid cooling main circuit is changed. Summary of the Invention

[0004] In view of this, the first object of the present invention is to provide a temperature control system for a thermal protection device, which can effectively improve the problem of poor heat exchange flow adaptation after the heat exchange form of the liquid cooling main circuit changes. The second object of the present invention is to provide a locomotive including the above-mentioned temperature control system.

[0005] In order to achieve the above first object, the present invention provides the following technical solutions:

[0006] A temperature control system for a thermal protection device, comprising:

[0007] A liquid cooling main circuit, used for circulating a heat exchange fluid capable of exchanging heat with a heat management object;

[0008] a first heat exchange path, wherein the first heat exchange path exchanges heat with the outside through an external heat exchanger;

[0009] a second heat exchange path, wherein the second heat exchange path exchanges heat with the outside through a compression refrigeration system;

[0010] a valve device for adjusting a flow ratio of a heat exchange fluid between the first heat exchange path and the second heat exchange path;

[0011] A pump group is used to drive the flow of heat exchange fluid in the liquid cooling main circuit. The pump group includes a first pump body and a second pump body connected in series and with the same driving direction. The first pump body and the second pump body can be opened synchronously, and the first pump body and / or the second pump body can be opened independently.

[0012] When multiple heat exchange paths are provided, and it is necessary to adjust the ratio of the heat exchange fluid flow between the first heat exchange path and the second heat exchange path through a valve device, and then adjust the heat exchange amount of each of the first heat exchange path and the second heat exchange path, changes in the pump group will occur. At this time, it is difficult to adapt to such adjustments by changing the speed of a single pump body to achieve a change in head. Therefore, two pump bodies, namely the first pump body and the second pump body, can be provided to adapt to the change in the heat exchange form of the liquid cooling main path according to the number of pumps that are turned on, thereby ensuring the overall heat exchange effect of the heat exchange main path. In summary, the temperature control system of the thermal protection device can effectively improve the problem of poor heat exchange flow adaptation after the heat exchange form of the liquid cooling main path changes.

[0013] In some technical solutions, the pump group includes a first branch arranged in parallel with the first pump body and / or a second branch arranged in parallel with the second pump body; the pump group also includes a valve group, which is used to allow the fluid to pass through the first pump body and one of the first branches, and / or to allow the fluid to pass through the second pump body and one of the second branches.

[0014] In some technical solutions, the valve group includes a first three-way valve and a second three-way valve, the inlet of the first three-way valve is used to introduce the heat exchange fluid, and the two optionally open outlets of the first three-way valve are respectively connected to: the inlet of the first pump body and the first branch; the inlet of the second three-way valve is connected to the outlet of the first pump body, and the two optionally open outlets of the second three-way valve are respectively connected to: the inlet of the second pump body and the second branch; the inlet of the second pump body is connected to the outlet of the first branch.

[0015] In some technical solutions, the first heat exchange path and the second heat exchange path are arranged in parallel; the valve device includes a first flow regulating valve arranged in the first heat exchange path and / or a second flow regulating valve arranged in the second heat exchange path.

[0016] In some technical solutions, the liquid cooling main circuit includes a liquid return interface for introducing the heat exchange fluid after heat exchange from the heat management object and a liquid supply interface for supplying the heat exchange fluid to the heat management object; the first heat exchange path and the second heat exchange path are both arranged between the pump group and the liquid supply interface.

[0017] In some technical solutions, an expansion liquid tank is provided on the inlet side of the pump group, and the exhaust side of the expansion liquid tank is connected to the outlet side of the pump group; an exhaust valve is provided between the expansion liquid tank and the inlet of the pump group; and a filter is provided at the return liquid interface.

[0018] In some technical solutions, a return liquid temperature sensor and a return liquid pressure sensor are provided between the inlet of the pump group and the return liquid interface; a supply liquid temperature sensor and a supply liquid pressure sensor are provided at the supply liquid interface.

[0019] In some technical solutions, a fan is further included, which is used to allow the air passing through the external heat exchanger to enter the condenser of the compression refrigeration system.

[0020] In some technical solutions, an intermediate heat exchanger is included, which includes a first heat exchange channel and a second heat exchange channel that can exchange heat with each other, the second heat exchange channel includes the first heat exchange channel, and the second heat exchange channel is the evaporator of the compression refrigeration system; the first heat exchange channel is connected in series with the external heat exchanger; the second heat exchange channel includes a channel heating device connected in series to the outlet of the first heat exchange channel.

[0021] To achieve the second objective, the present invention further provides a locomotive comprising a temperature control system for any of the aforementioned thermal protection devices, and also comprising a power battery, the power battery having a liquid cooling heat exchange channel. The main liquid cooling circuit of the temperature control system of the thermal protection device communicates with the liquid cooling heat exchange channel or exchanges heat with the liquid cooling heat exchange channel through a heat exchanger, thereby exchanging heat with the power battery. Because the temperature control system of the thermal protection device described above has the aforementioned technical effects, a locomotive equipped with the temperature control system of the thermal protection device should also have corresponding technical effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 A schematic structural diagram of a temperature control system of a thermal protection device provided in an embodiment of the present invention.

[0024] The following are marked in the accompanying drawings:

[0025] Liquid cooling main circuit 1, first heat exchange path 2, second heat exchange path 3, valve device 4, pump group 5, compression refrigeration system 6, external heat exchanger 7, expansion liquid tank 8, exhaust valve 9, filter 10, return liquid temperature sensor 11, return liquid pressure sensor 12, fan 13, channel heating device 14, supply liquid temperature sensor 15, supply liquid pressure sensor 16, intermediate heat exchanger 17;

[0026] Liquid return interface 1-1, liquid supply interface 1-2;

[0027] A first flow regulating valve 4-1 and a second flow regulating valve 4-2;

[0028] First pump body 5-1, second pump body 5-2, first branch 5-3, second branch 5-4, first three-way valve 5-5, second three-way valve 5-6;

[0029] Condenser 6-1, compressor 6-2, throttling element 6-3. DETAILED DESCRIPTION

[0030] An embodiment of the present invention discloses a temperature control system for a thermal protection device, which can effectively improve the problem of poor heat exchange flow adaptability after the heat exchange form of the liquid cooling main circuit changes.

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] See also Figure 1 , Figure 1 A schematic structural diagram of a temperature control system of a thermal protection device provided in an embodiment of the present invention.

[0033] In some embodiments, a temperature control system for a thermal protection device is provided, which mainly includes a liquid cooling main circuit 1, a first heat exchange passage 2, a second heat exchange passage 3, a valve device 4 and a pump group 5.

[0034] The liquid cooling main circuit 1 is used to circulate a heat exchange fluid, and the heat exchange fluid can exchange heat with the heat management object. The heat exchange between the heat exchange fluid and the heat management object can be achieved in at least two forms: one form is that the liquid cooling main circuit 1 includes a return liquid interface 1-1 for introducing the heat exchange fluid after heat exchange from the heat management object and a liquid supply interface 1-2 for supplying the heat exchange fluid to the heat management object. In this case, the heat exchange fluid is directly introduced into the heat management object for direct heat exchange; the other form is that a heat exchanger is set. When the heat exchange fluid flows through the heat exchanger, it is cooled by air or the heat exchanger is attached to the power battery to exchange heat with the power battery or other fluid after heat exchange with the heat management object. In this case, the heat exchange fluid in the liquid cooling main circuit 1 does not flow through the heat management object, but further exchanges heat through other media. The heat management object is the power battery described above, especially the power battery of a new energy locomotive.

[0035] The first heat exchange path 2 exchanges heat with the outside through the external heat exchanger 7. There are at least two specific heat exchange methods: the heat exchange fluid flowing through the first heat exchange path 2 can directly flow through the external heat exchanger 7 to achieve heat exchange with the outside through the external heat exchanger 7; or the heat exchange fluid flowing through the first heat exchange path 2 can exchange heat with the heat exchange fluid flowing through the external heat exchanger 7 through a plate heat exchanger to achieve heat exchange with the outside through the external heat exchanger 7.

[0036] The second heat exchange path 3 exchanges heat with the outside through the compression refrigeration system 6. Generally speaking, the heat exchange fluid and the fluid flowing through the compression refrigeration system 6 are different fluids. Therefore, the heat exchange fluid in the second heat exchange path 3 and the heat exchange fluid in the compression refrigeration system 6 can be exchanged through an intermediate heat exchanger, described below. The intermediate heat exchanger is typically a plate heat exchanger. Heat exchange in this context is not limited to heat dissipation but also includes heating. The specific heat exchange depends on the external temperature, the temperature control requirements of the thermal management object, and the operating mode of the compression refrigeration system 6, so as to meet the requirements.

[0037] The valve device 4 is used to adjust the heat exchange fluid flow ratio between the first heat exchange passage 2 and the second heat exchange passage 3, so that compression refrigeration heat exchange and natural heat exchange through the external heat exchanger 7 can be selected according to the actual environment and heat exchange needs. There are two specific ways to adjust the ratio: one is to connect the first heat exchange passage 2 and the second heat exchange passage 3 in parallel, and the specific adjustment method is described in the embodiment below; the other is to connect the first heat exchange passage 2 and the second heat exchange passage 3 in series, with the first heat exchange passage 2 located upstream of the second heat exchange passage 3 to perform external heat exchange first, but at least one of the first heat exchange passage 2 and the second heat exchange passage 3 is connected in parallel with a bypass channel. If the first heat exchange passage 2 is connected in parallel with a bypass channel, changing the flow ratio between the bypass channel and the first heat exchange passage 2 can achieve the change of the heat exchange fluid flow ratio between the first heat exchange passage 2 and the second heat exchange passage 3. By adjusting the ratio, the ratio of heat exchange through the external heat exchanger 7 and heat exchange through the compression refrigeration system 6 is actually adjusted to adapt to changes in the environment.

[0038] The pump assembly 5 is used to drive the heat exchange fluid in the main liquid cooling circuit 1. The specific location of the pump assembly 5 is not limited; it is determined as long as it can drive the heat exchange fluid in the main liquid cooling circuit 1. Specifically, the pump assembly 5 can include a first pump body 5-1 and a second pump body 5-2 connected in series and with the same driving direction. The first pump body 5-1 and the second pump body 5-2 can be activated simultaneously, and at least one of them can be activated independently. In other words, there are at least two operating states: the first operating state is when both the first pump body 5-1 and the second pump body 5-2 are activated. In this state, the pump assembly 5 has the highest head, which can be defined as the first head. The second operating state is when only one of the first pump body 5-1 and the second pump body 5-2 is activated. In this state, the pump assembly 5 has a lower head. For example, if only the first pump body 5-1 is activated, this state can be defined as the second head, which is smaller than the first head. It should be noted that the fluid can pass through the second pump body 5-2 when it is closed, in which case the second pump body 5-2 should not interfere. The fluid can also pass through other parallel channels to bypass the second pump body 5-2.

[0039] Due to the adjustment of valve device 4, the ratio of heat exchange fluid flow between first heat exchange passage 2 and second heat exchange passage 3 will change, resulting in a change in the flow resistance in liquid cooling main circuit 1. For example, in a parallel connection, if the first and second heat exchange passages 2 and 3 are fully open, the flow resistance will increase, requiring an increase in pump head. In this case, pump group 5 can be switched from single pump operation to dual pump operation. In another example, in a series connection, if the first and second heat exchange passages 2 and 3 are fully open, the flow resistance will increase, requiring an increase in pump head. In this case, if the first and second heat exchange passages 2 and 3 are fully open, the flow resistance will increase, requiring an increase in pump head, and pump group 5 can be switched from single pump operation to dual pump operation. In another example, if the first and second heat exchange passages 2 and 3 are fully open, the flow resistance will increase, resulting in a change in the flow resistance of the parallel passage (generally a straight-through passage, which has significantly lower flow resistance than the passage requiring heat exchange). The parallel passage does not require heat exchange, and its flow resistance will be significantly lower. This will reduce the resistance of the entire liquid cooling main circuit, reducing the pump head of pump group 5. In this case, pump group 5 can be switched from dual pump operation to single pump operation.

[0040] Therefore, when multiple heat exchange paths are provided and it is necessary to adjust the heat exchange fluid flow ratio between the first heat exchange path 2 and the second heat exchange path 3 through the valve device 4, and then adjust the heat exchange amount of the first heat exchange path 2 and the second heat exchange path 3 respectively, the pump group 5 will change. At this time, it is difficult to adapt to such adjustment by changing the speed of the single pump body to achieve the head change. Therefore, two pump bodies can be provided, namely the first pump body 5-1 and the second pump body 5-2, to adapt to the change of the heat exchange form of the liquid cooling main path 1 according to the number of pumps turned on, thereby ensuring the overall heat exchange effect of the heat exchange main path. In summary, the temperature control system of the thermal protection device can effectively improve the problem of poor heat exchange flow adaptation after the heat exchange form of the liquid cooling main path 1 changes.

[0041] It should be noted that pump group 5 can either directly change the heat exchange fluid velocity in the main liquid cooling circuit 1 by varying its power to adjust heat exchange efficiency, or adaptively change its power based on changes in the flow resistance of the main liquid cooling circuit 1 to maintain flow. The power of pump group 5 can be varied by either the number of pumps activated or the power of a single pump.

[0042] It should also be noted that the pump group 5 can adjust the number of pump bodies opened by manual control according to the opening mode of the valve device 4. Alternatively, the pump group 5 and the valve device 4 can be linked to each other to adjust the opening state synchronously. Specifically, it can be set as needed.

[0043] In some embodiments, the pump assembly 5 may include a first branch 5-3 arranged in parallel with the first pump body 5-1 and / or a second branch 5-4 arranged in parallel with the second pump body 5-2; the pump assembly 5 may also include a valve assembly for allowing the fluid to selectively pass through either the first pump body 5-1 or the first branch 5-3, and / or for allowing the fluid to selectively pass through either the second pump body 5-2 or the second branch 5-4. This allows the heat exchange fluid to bypass a pump body when it is shut down and flow through its branch, thereby improving the circulation effect.

[0044] In a specific example, the pump group 5 includes a first branch 5-3 arranged in parallel with the first pump body 5-1 and a second branch 5-4 arranged in parallel with the second pump body 5-2, and the outlet of the first pump body 5-1 is connected to the inlet of the second pump body 5-2. When the first pump body 5-1 and the second pump body 5-2 are both opened, the valve group is selected so that the heat exchange fluid no longer passes through the first branch 5-3 and the second branch 5-4, but passes through the first pump body 5-1 and the second pump body 5-2 in sequence, thereby realizing the joint operation of the two pumps. When the first pump body 5-1 is closed and the second pump body 5-2 is opened, the pump group 5 can be selected so that the heat exchange fluid passes through the first branch 5-3 and the second pump body 5-2 in sequence, and no longer passes through the first pump body 5-1 and the second branch 5-4, thereby realizing the operation of a single pump. The second pump body 5-2 is closed and the first pump body 5-1 is opened. The pump group 5 can be selected so that the heat exchange fluid passes through the first pump body 5-1 and the second branch 5-4 in sequence, and no longer passes through the first branch 5-3 and the second pump body 5-2, thereby realizing single pump operation.

[0045] It should be noted that the valve group can be selected to have multiple switch valves, which are respectively set at both ends of the first pump body 5-1, the first branch 5-3, the second pump body 5-2 and the second branch 5-4. However, such a setting will use too many switch valves.

[0046] In some embodiments, the valve group can include a first three-way valve 5-5 and a second three-way valve 5-6. The inlet of the first three-way valve 5-5 is used to introduce heat exchange fluid into the liquid cooling main circuit 1. The two optional outlets of the first three-way valve 5-5 are respectively connected to: the inlet of the first pump body 5-1 and the first branch 5-3, so that the introduced heat exchange fluid can be controlled by the first three-way valve 5-5 and can choose to enter the first pump body 5-1 or the first branch 5-3. Specifically, the first three-way valve 5-5 controls: when the first pump body 5-1 is turned on, the heat exchange fluid chooses to enter the first pump body 5-1 instead of the first branch 5-3; and when the first pump body 5-1 is turned off, the heat exchange fluid chooses to enter the first branch 5-3 instead of the first pump body 5-1.

[0047] The inlet of the second three-way valve 5-6 is connected to the outlet of the first pump body 5-1, and the two optional outlets of the second three-way valve 5-6 are respectively connected to the inlet of the second pump body 5-2 and the second branch 5-4, so that the heat exchange fluid at the outlet of the first pump body 5-1 can be controlled by the second three-way valve 5-6 and can choose to enter the second pump body 5-2 or the second branch 5-4. Specifically, the second three-way valve 5-6 controls: when the second pump body 5-2 is open, the heat exchange fluid chooses to enter the second pump body 5-2 without passing through the second branch 5-4; and when the second pump body 5-2 is closed, the heat exchange fluid chooses to enter the second branch 5-4 without passing through the second pump body 5-2.

[0048] The inlet of the second pump body 5-2 is connected to the outlet of the first branch 5-3, which can be directly connected without setting other on-off valves, so that when the first pump body 5-1 is closed, the heat exchange fluid flows through the first three-way valve 5-5, the first branch 5-3, and the second pump body 5-2, and the second pump body 5-2 is opened.

[0049] In the above-mentioned pump group 5: on the one hand, it can be achieved by a small number of three-way valves, which will make the structure more compact than using too many switch valves; on the other hand, the first three-way valve 5-5 can be changed so that the outlet corresponding to the first pump body 5-1 in the first three-way valve 5-5 is disconnected, and the second three-way valve 5-6 can be fully closed so that the inlet corresponding to the first pump body 5-1 is disconnected, so that the first pump body 5-1 can be disassembled for maintenance without affecting the independent operation of the second pump body 5-2.

[0050] It should be noted that the first pump body 5-1 and the second pump body 5-2 can be opened independently.

[0051] Furthermore, a switch valve can be provided at the outlet end of the second pump body 5-2, so that when the second pump body 5-2 is damaged, the outlet of the first three-way valve 5-5 corresponding to the first branch 5-3 can be closed, the outlet of the second three-way valve 5-6 corresponding to the second pump body 5-2 can be closed, and the above-mentioned switch valve is closed. At this time, the second pump body 5-2 can be disassembled, and the first pump body 5-1 can operate normally.

[0052] In some embodiments, the first heat exchange path 2 and the second heat exchange path 3 can be arranged in parallel; the valve device 4 includes a first flow control valve 4-1 disposed in the first heat exchange path 2 and / or a second flow control valve 4-2 disposed in the second heat exchange path 3. The first flow control valve 4-1 and / or the second flow control valve 4-2 can be used to adjust the flow rate and change the flow distribution ratio of the liquid cooling main path 1. Specifically, a portion of the heat exchange fluid in the liquid cooling main path 1 passes through the first heat exchange path 2, and another portion passes through the second heat exchange path 3. The ratio of these two portions can be adjusted by the flow control valves. The heat exchange fluid after heat exchange in the first heat exchange path 2 and the heat exchange fluid after heat exchange in the second heat exchange path 3 are combined and supplied to the thermal management target, as shown in the accompanying drawings, to the liquid supply interface 1-2. The distribution ratio can be adjusted based on the heat exchange efficiency of the external heat exchanger 7. When heat dissipation requirements are met, the external heat exchanger 7 can be used more frequently for heat exchange to reduce overall energy consumption.

[0053] In one example, only the first heat exchange passage 2 is provided with a first flow regulating valve 4-1. When the first flow regulating valve 4-1 is closed, the heat exchange fluid all passes through the second heat exchange passage 3. At this time, the resistance is the greatest and the required head is large. It is possible to choose to open a dual pump to meet the heat dissipation requirements, mainly through the compression refrigeration system 6 for heat dissipation. As the opening of the first flow regulating valve 4-1 gradually increases, the heat exchange fluid will partially pass through the first heat exchange passage 2. When the first flow regulating valve 4-1 is fully opened, part of the heat exchange fluid passes through the first heat exchange passage 2 and the other part passes through the second heat exchange passage 3. At this time, the head is relatively small, so it is possible to choose to open a single pump body. To meet the heat dissipation requirements, part of the heat exchange fluid flows into the first heat exchange passage 2 to dissipate heat through the external heat exchanger 7, and the other part of the heat exchange fluid flows into the second heat exchange passage 3 to exchange heat through the compression refrigeration system 6. The two parts of the heat exchange fluid are then mixed and supplied to the thermal management object.

[0054] In one example, the first heat exchange path 2 is equipped with a first flow control valve 4-1, and the second heat exchange path 3 is equipped with a second flow control valve 4-2. When the first flow control valve 4-1 is closed and the second flow control valve 4-2 is fully opened, the heat exchange fluid entirely passes through the second heat exchange path 3. At this point, the resistance is high, requiring a high head. Therefore, dual pumps can be activated to meet heat dissipation requirements, primarily through the compression refrigeration system 6. As the opening of the first flow control valve 4-1 gradually increases, the heat exchange fluid partially passes through the first heat exchange path 2. When the first flow control valve 4-1 is fully opened, part of the heat exchange fluid passes through the first heat exchange path 2, while the rest passes through the second heat exchange path 3. At this point, the resistance is low, requiring a low head. Therefore, a single pump can be activated. To meet heat dissipation requirements, part of the heat exchange fluid flows into the first heat exchange path 2 to dissipate heat through the external heat exchanger 7, while the rest flows into the second heat exchange path 3 to exchange heat through the compression refrigeration system 6. Furthermore, the opening of the second flow regulating valve 4-2 can be gradually reduced, at which point the proportion of heat exchange fluid allocated to the first heat exchange path 2 will gradually increase, while the proportion allocated to the second heat exchange path 3 will gradually decrease. When the second flow regulating valve 4-2 is fully closed, the resistance is greater and the required lift is also greater, so it is possible to activate dual pumps.

[0055] In some embodiments, the liquid cooling main circuit 1 may exchange heat with the fluid in the thermal management object through a heat exchanger, which may easily lead to heat loss.

[0056] The main liquid cooling circuit 1 can include a liquid return interface 1-1 for introducing heat exchange fluid from the heat management object after heat exchange, and a liquid supply interface 1-2 for supplying heat exchange fluid to the heat management object, so as to directly introduce the heat exchange fluid to the heat management object for heat exchange. The first heat exchange path 2 and the second heat exchange path 3 are connected in series or in parallel between the liquid return interface 1-1 and the liquid inlet interface.

[0057] The first heat exchange passage 2 and the second heat exchange passage 3 are both arranged between the pump group 5 and the liquid supply interface 1-2, so that the pump group 5 directly supplies liquid to the first heat exchange passage 2 and the second heat exchange passage 3, avoiding directly supplying liquid through the liquid supply interface 1-2, resulting in a relatively high pressure at the liquid supply interface 1-2.

[0058] Of course, the first heat exchange passage 2 and the second heat exchange passage 3 may also be provided between the liquid return interface 1 - 1 and the pump group 5 .

[0059] In some embodiments, an expansion liquid tank 8 may be provided at the inlet side of the pump group 5, with the exhaust side of the expansion liquid tank 8 connected to the outlet side of the pump group 5 to balance the system pressure and reduce the gas content in the heat exchange fluid passing through the pump group 5. The expansion liquid tank 8 may be specifically an expansion water tank.

[0060] Specifically, an exhaust valve 9 may be provided between the expansion liquid tank 8 and the inlet of the pump group 5 , so as to further reduce the gas content in the heat exchange fluid passing through the pump group 5 .

[0061] In some embodiments, in order to effectively control the flow resistance and ensure the heat exchange efficiency, a filter 10 may be provided at the liquid return interface 1 - 1 .

[0062] In some embodiments, a return liquid temperature sensor 11 and a return liquid pressure sensor 12 may be provided between the inlet of the pump assembly 5 and the return liquid interface 1-1; and a supply liquid temperature sensor 15 and a supply liquid pressure sensor 16 may be provided at the supply liquid interface 1-2. In practical applications, the supply liquid temperature sensor 15 and the return liquid temperature sensor 11 can be compared as needed to achieve temperature adjustment by adjusting at least one or more of the following: the power of the pump assembly 5, the external heat exchange efficiency of the external heat exchanger 7, and the operating efficiency of the compression refrigeration system 6. Pressure changes can also be detected using the return liquid pressure sensor 12 and the supply liquid pressure sensor 16, so that the power of the pump assembly 5 can be adjusted if the pressure is unsatisfactory.

[0063] In some embodiments, both the return liquid interface 1 - 1 and the supply liquid interface 1 - 2 may be provided with liquid injection ports, which is more reliable than providing a liquid injection port at a single location.

[0064] In some embodiments, the condenser 6-1 of the compression refrigeration system 6 can be externally air-cooled, in which case a corresponding fan 13 is required. The corresponding external heat exchanger 7 can also be externally air-cooled, in which case a corresponding fan 13 is required. Fans 13 can be provided separately. To make the structure more compact, and in most operating conditions where both the condenser 6-1 and the external heat exchanger 7 are turned on, the fan 13 can be used to direct air passing through the external heat exchanger 7 into the condenser 6-1 of the compression refrigeration system 6, so that the external air first absorbs heat from the external heat exchanger 7 and then from the condenser 6-1.

[0065] As shown in the accompanying drawings, the external heat exchanger 7 can be divided into two parallel heat exchange sub-units, and the condenser 6-1 can be divided into two parallel condensation sub-units. On both sides of the fan 13, a heat exchange sub-unit and a condensation sub-unit are stacked. The external heat exchanger 7 is specifically a dry cooler.

[0066] In some embodiments, an intermediate heat exchanger 17 may be provided. The intermediate heat exchanger 17 includes a first heat exchange channel and a second heat exchange channel capable of exchanging heat with each other. The second heat exchange channel 3 includes the first heat exchange channel, and the second heat exchange channel is the evaporator of the compression refrigeration system 6. The intermediate heat exchanger facilitates heat exchange between the first heat exchange channel 2 and the compression refrigeration system 6.

[0067] A simple compression refrigeration system 6 mainly includes an evaporator (second heat exchange channel), a compressor 6-2, a condenser 6-1 and a throttling element 6-3.

[0068] Specifically, the compression refrigeration system 6 can include a second heat exchange channel, a fluorine injection nozzle, an intake temperature sensor, a low-pressure pressure sensor, a gas-liquid separator, a compressor 6-2, a one-way valve, an exhaust temperature sensor, a fluorine injection nozzle, a high-pressure pressure sensor, a high-pressure pressure switch, a condenser 6-1, a fluorine injection nozzle, a filter 10, a sight glass, and an electronic expansion valve (throttling element 6-3) connected in sequence.

[0069] In some embodiments, the first heat exchange passage 2 can be connected in series with the external heat exchanger 7 so that the heat exchange fluid can directly flow into the external heat exchanger 7 for heat exchange, thereby improving the heat exchange efficiency.

[0070] In some embodiments, the second heat exchange path 3 includes a channel heating device 14 connected in series with the outlet of the first heat exchange path to heat the heat management object. Of course, the channel heating device 14 can also be provided in parallel with both the first heat exchange path 2 and the second heat exchange path 3. The channel heating device 14 is generally an electric heating device.

[0071] Based on the temperature control system of the thermal protection device provided in the above embodiments, the present invention further provides a locomotive, comprising the temperature control system of any of the above embodiments, and further comprising a power battery having a liquid cooling heat exchange channel. The liquid cooling main path 1 of the temperature control system of the thermal protection device communicates with the liquid cooling heat exchange channel or exchanges heat with the liquid cooling heat exchange channel through a heat exchanger to achieve heat exchange with the power battery. Since this locomotive employs the temperature control system of the thermal protection device in the above embodiments, the beneficial effects of this locomotive can be referred to in the above embodiments.

[0072] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0073] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A temperature control system for a thermal protection device, characterized in that: include: A liquid cooling main circuit (1) for circulating a heat exchange fluid capable of exchanging heat with a heat management object; a first heat exchange path (2), wherein the first heat exchange path (2) exchanges heat with the outside through an external heat exchanger (7); a second heat exchange path (3), wherein the second heat exchange path (3) exchanges heat with the outside through a compression refrigeration system (6); A valve device (4) for adjusting the flow ratio of the heat exchange fluid between the first heat exchange passage (2) and the second heat exchange passage (3); A pump group (5) is used to drive the flow of heat exchange fluid in the liquid cooling main circuit (1), and the pump group (5) includes a first pump body (5-1) and a second pump body (5-2) connected in series and having the same driving direction. The first pump body (5-1) and the second pump body (5-2) can be started synchronously, and the first pump body (5-1) and / or the second pump body (5-2) can be started independently.

2. The temperature control system of the thermal protection device according to claim 1, characterized in that: The pump group (5) includes a first branch (5-3) arranged in parallel with the first pump body (5-1) and / or a second branch (5-4) arranged in parallel with the second pump body (5-2); the pump group (5) also includes a valve group, which is used to allow the fluid to selectively pass through the first pump body (5-1) and one of the first branch (5-3), and / or to allow the fluid to selectively pass through one of the second pump body (5-2) and the second branch (5-4).

3. The temperature control system of the thermal protection device according to claim 2, characterized in that: The valve group comprises a first three-way valve (5-5) and a second three-way valve (5-6), the inlet of the first three-way valve (5-5) is used to introduce the heat exchange fluid, and the two optionally open outlets of the first three-way valve (5-5) are respectively connected to: the inlet of the first pump body (5-1) and the first branch (5-3); the inlet of the second three-way valve (5-6) is connected to the outlet of the first pump body (5-1), and the two optionally open outlets of the second three-way valve (5-6) are respectively connected to: the inlet of the second pump body (5-2) and the second branch (5-4); the inlet of the second pump body (5-2) is connected to the outlet of the first branch (5-3).

4. The temperature control system of the thermal protection device according to any one of claims 1 to 3, characterized in that: The first heat exchange passage (2) and the second heat exchange passage (3) are arranged in parallel; the valve device (4) comprises a first flow regulating valve (4-1) arranged in the first heat exchange passage (2) and / or a second flow regulating valve (4-2) arranged in the second heat exchange passage (3).

5. The temperature control system of the thermal protection device according to claim 4, characterized in that: The liquid cooling main circuit (1) comprises a liquid return interface (1-1) for introducing heat exchange fluid after heat exchange from the heat management object and a liquid supply interface (1-2) for supplying heat exchange fluid to the heat management object; the first heat exchange path (2) and the second heat exchange path (3) are both arranged between the pump group (5) and the liquid supply interface (1-2).

6. The temperature control system of the thermal protection device according to claim 5, characterized in that: An expansion liquid tank (8) is provided on the inlet side of the pump group (5), and the exhaust side of the expansion liquid tank (8) is connected to the outlet side of the pump group (5); an exhaust valve (9) is provided between the expansion liquid tank (8) and the inlet of the pump group (5); and a filter (10) is provided at the liquid return interface (1-1).

7. The temperature control system of the thermal protection device according to claim 6, characterized in that: A return liquid temperature sensor (11) and a return liquid pressure sensor (12) are provided between the inlet of the pump group (5) and the return liquid interface (1-1); and a supply liquid temperature sensor (15) and a supply liquid pressure sensor (16) are provided at the supply liquid interface (1-2).

8. The temperature control system of the thermal protection device according to claim 4, characterized in that: It also includes a fan (13), which is used to allow the air passing through the external heat exchanger (7) to enter the condenser (6-1) of the compression refrigeration system (6).

9. The temperature control system of the thermal protection device according to claim 3, characterized in that: The intermediate heat exchanger (17) includes a first heat exchange channel and a second heat exchange channel capable of exchanging heat with each other, the second heat exchange channel (3) includes the first heat exchange channel, and the second heat exchange channel is an evaporator of the compression refrigeration system (6); the first heat exchange channel (2) is connected in series with the external heat exchanger (7); and the second heat exchange channel (3) includes a channel heating device (14) connected in series with an outlet of the first heat exchange channel.

10. A locomotive comprising a power battery having a liquid cooling heat exchange channel, characterized in that: A temperature control system comprising a thermal protection device according to any one of claims 1 to 9, wherein a liquid cooling main circuit (1) of the temperature control system of the thermal protection device is connected to the liquid cooling heat exchange channel or exchanges heat with the liquid cooling heat exchange channel through a heat exchanger to achieve heat exchange with the power battery.

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