Heat dissipation control device and heat dissipation control method

Abstract

The present invention relates to a heat dissipation control device, which is used in a hydraulic system and includes: a control valve and a heat exchanger, wherein the control valve is fluidly connected between a hydraulic fluid box and a heat exchanger of the hydraulic system, and includes: a first interface and a second interface fluidly connected between the control valve and the hydraulic fluid box, and a third interface and a fourth interface fluidly connected between the control valve and the heat exchanger, wherein the control valve also includes a first connecting portion, the first connecting portion includes a first fluid passage fluidly connected to the first interface and the third interface, a second fluid passage fluidly connected to the second interface and the fourth interface, and a third fluid passage fluidly connected to the first fluid passage and the second fluid passage. Through the device, the hydraulic fluid can enter the heat exchanger through the control valve under normal oil temperature / oil pressure, simplifying the fluid injection, cleaning and exhaust operations of the downstream pipeline and the heat exchanger. In addition, the present invention also relates to a heat dissipation control method.

Description

Technical Field

[0001] The present invention relates to a heat dissipation control device, and more particularly, to a heat dissipation control device for use in a hydraulic system. Background Art

[0002] In hydraulic systems such as aircraft hydraulic systems, the increase in hydraulic oil temperature will cause many adverse effects. For example, the increase in hydraulic oil temperature will cause the viscosity of the hydraulic oil to decrease, and the significant decrease in viscosity will significantly increase the leakage of the hydraulic system, and then the efficiency of the hydraulic pump and the entire system will also drop sharply. Moreover, the increase in oil temperature will destroy the oil film of the relative motion parts, increase the friction resistance, and intensify the wear. In addition, when the low-viscosity hydraulic oil flows through the hydraulic components, the characteristics of the components will change, resulting in unstable pressure and speed regulation. In addition, the high temperature of the hydraulic oil will also intensify the oxidation of the oil and reduce its service life. The colloid formed by the oxidation of the oil can easily block various control ports, making them unable to work normally; high temperature will also cause rubber seals, hoses and other components to age prematurely and fail.

[0003] At present, in order to ensure that the temperature of the hydraulic oil in a hydraulic system such as an aircraft hydraulic system is within an appropriate range, a heat exchanger such as a hydraulic-fuel heat exchanger and a heat exchanger bypass valve are usually used to dissipate heat from the overheated hydraulic system. The general working principle is that when the temperature of the hydraulic oil exceeds a certain threshold, the heat exchanger bypass valve opens, allowing the overheated hydraulic oil to pass through the hydraulic-fuel heat exchanger installed in, for example, an aircraft fuel tank, to fully exchange heat, thereby achieving the purpose of suppressing further temperature rise.

[0004] In the traditional heat dissipation architecture of hydraulic systems such as aircraft hydraulic systems, when the temperature of the hydraulic oil in the hydraulic system is normal, the oil in the hydraulic system return oil circuit enters from the inlet of the heat exchanger bypass valve and then returns to the hydraulic fluid box from the return oil port, and the heat exchanger is in an isolated state. When the temperature of the hydraulic oil in the hydraulic system rises to the preset temperature value of the heat exchanger bypass valve, the thermal valve block will move to the pass position, and the hydraulic oil in the hydraulic system enters the heat exchanger to exchange heat with the aircraft fuel to achieve the purpose of heat dissipation and suppress temperature rise.

[0005] However, as civil aviation pays more and more attention to the risk of fuel tank explosion, the traditional aircraft hydraulic system heat dissipation solution has disadvantages. When the hydraulic system fails, the temperature of the hydraulic system will become higher and higher, and the overheated hydraulic oil will enter the heat exchanger in the aircraft fuel tank for heat dissipation, which will make it a potential source of danger for the fuel tank explosion. On the other hand, for the traditional hydraulic heat dissipation architecture, since the thermistor valve block only moves to the open position when the hydraulic oil temperature rises to a predetermined temperature value, the oil can enter the heat exchanger. Therefore, in the traditional hydraulic heat dissipation architecture, it is difficult to refuel, maintain, clean or vent the downstream of the heat exchanger bypass valve and the heat exchanger itself, and it is easy to introduce air into the circuit during oil filling or cleaning, thereby reducing the efficiency of the hydraulic system.

[0006] Therefore, there is an urgent need to provide an improved heat dissipation control device, and the heat dissipation control device can overcome one or more shortcomings in the prior art. Summary of the invention

[0007] The present invention proposes a heat dissipation control device, so that the refueling, cleaning and exhausting operations of the downstream pipeline and heat exchanger of the heat dissipation control device are simpler and can be completed at normal oil temperature. In addition, the heat dissipation control device according to the present invention can prevent the potential risk of explosion of the aircraft fuel tank caused by overheating of hydraulic oil, thereby improving the safety of aircraft operation.

[0008] According to one aspect of the present invention, a heat dissipation control device is provided. The heat dissipation control device is used in a hydraulic system and may include: a control valve and a heat exchanger, wherein:

[0009] The control valve is fluidly connected between a hydraulic fluid tank and a heat exchanger of the hydraulic system and includes:

[0010] a first interface and a second interface fluidly connected between the control valve and the hydraulic fluid tank, and

[0011] A third interface and a fourth interface are fluidly connected between the control valve and the heat exchanger,

[0012] The control valve further includes a first connecting portion, which includes a first fluid passage fluidly connecting the first interface and the third interface, a second fluid passage fluidly connecting the second interface and the fourth interface, and a third fluid passage fluidly connecting the first fluid passage and the second fluid passage.

[0013] When the hydraulic system is in normal working state, the temperature of the hydraulic fluid is in the normal working range. The hydraulic fluid of the hydraulic circuit enters the first fluid path through the first interface (e.g., the oil inlet), and returns to the second interface (e.g., the oil return port) through the second fluid path (the hydraulic fluid enters the heat exchanger) and the third fluid path (the hydraulic fluid does not enter the heat exchanger). Since the flow resistance through the heat exchanger circuit is relatively large, most of the hydraulic fluid returns to the oil return port through the third fluid path, and a small part returns to the oil return port through the heat exchanger. Through this arrangement, the hydraulic fluid can enter the heat exchanger through the control valve at normal oil temperature / oil pressure, without raising the oil temperature of the hydraulic fluid to a predetermined threshold temperature to connect the control valve to the heat exchanger. Therefore, compared with the traditional solution, the downstream pipeline and heat exchanger of the heat dissipation control valve of the present invention are simpler to refuel, clean and exhaust, and can be completed at normal oil temperature.

[0014] In addition, due to the parallel fluid passages, a portion (eg, a small portion) of the hydraulic fluid can flow through the heat exchanger for heat exchange during operation, thereby reducing the temperature of the hydraulic fluid to a certain extent.

[0015] According to the above aspect of the present invention, preferably, the control valve may further include a second communication portion, the second communication portion including a fourth fluid passage fluidly connecting the first interface and the third interface, and a fifth fluid passage fluidly connecting the second interface and the fourth interface, and

[0016] The control valve can be switched between the first communication portion and the second communication portion.

[0017] The control valve is switched to the second communication portion, that is, the second communication portion is activated, thereby directly communicating the first port with the third port and the second port with the fourth port, so that the flow path of the hydraulic fluid can be changed as desired.

[0018] According to the above-mentioned aspects of the present invention, preferably, when the fluid temperature at the first interface exceeds the first temperature threshold, the control valve switches to the second connecting part, so that the fluid with higher temperature can flow directly to the heat exchanger to cool the hydraulic fluid (such as hydraulic oil), thereby maintaining the hydraulic fluid in the hydraulic system at a desired temperature.

[0019] According to the above aspect of the present invention, preferably, the control valve may further include a first one-way valve, which is arranged on the third fluid passage to allow the fluid to flow from the first fluid passage to the second fluid passage in one direction. With the one-way valve, the hydraulic fluid can only flow from the first fluid passage to the second fluid passage in one direction, that is, only flow from the first interface to the second interface, thereby avoiding the hydraulic fluid from flowing back.

[0020] According to the above aspect of the present invention, preferably, the control valve may further include a third communication portion, and the third communication portion includes a sixth fluid passage fluidly connecting the second interface and the fourth interface, and a seventh fluid passage fluidly connecting the first interface and the sixth fluid passage, and

[0021] The control valve can be switched between the second communication portion and the third communication portion.

[0022] With this arrangement, the flow path of the hydraulic fluid can be changed as desired.

[0023] According to the above aspect of the present invention, preferably, when the temperature of the fluid at the first interface exceeds the second temperature threshold, the control valve switches to the third communication portion.

[0024] This can prevent the overly hot hydraulic fluid from flowing to the heat exchanger when the temperature of the hydraulic fluid rises to an abnormal temperature, such as exceeding the second temperature threshold, thereby damaging corresponding components and causing possible further risks. For example, in a device where the heat exchanger is arranged in the fuel tank and performs temperature management by exchanging heat with the fuel, it can ensure that the temperature of the fuel tank is kept below the explosion-proof threshold to ensure the safety of the aircraft.

[0025] According to the above aspect of the present invention, preferably, the second temperature threshold may be greater than the first temperature threshold, so that the fluid connection between the hydraulic fluid tank and the heat exchanger is cut off when the temperature is too high, thereby ensuring the safety of the heat exchanger and the hydraulic system.

[0026] According to the above aspect of the present invention, preferably, the control valve may further include a second one-way valve, which is arranged on the seventh fluid passage to allow the fluid to flow from the first interface to the seventh fluid passage in one direction. With the one-way valve, the hydraulic fluid can only flow from the seventh fluid passage to the sixth fluid passage in one direction, that is, only flow from the first interface to the second interface, thereby avoiding the hydraulic fluid from flowing back.

[0027] According to the above aspects of the present invention, preferably, the heat dissipation control device can be used in an aircraft hydraulic system, and the heat exchanger is a hydraulic-fuel heat exchanger arranged in an aircraft fuel tank. In this way, the predetermined heat dissipation control function can be fully realized by using existing components.

[0028] According to the above aspect of the present invention, preferably, the heat dissipation control device may further include a safety valve disposed between the first fluid passage and the second fluid passage. The safety valve may be used to prevent sudden increase in flow or unloading of local overpressure caused by downstream failure.

[0029] According to the above aspect of the present invention, preferably, the control valve may be a thermal solenoid valve, so that the switching of the control valve between various connecting parts or various states can be automatically controlled by the temperature of the hydraulic fluid flowing through the control valve to achieve reliable automatic control.

[0030] According to another aspect of the present invention, a heat dissipation control method is also provided. The method is used to control the temperature of a hydraulic fluid in a hydraulic system and may include the following steps:

[0031] Provide control valves and heat exchangers;

[0032] Wherein, the control valve is fluidly connected between the hydraulic fluid tank and the heat exchanger of the hydraulic system, and the control valve may include:

[0033] a first interface and a second interface fluidly connected between the control valve and the hydraulic fluid tank, and

[0034] A third interface and a fourth interface are fluidly connected between the control valve and the heat exchanger,

[0035] Wherein, the control valve further includes a first communication portion, the first communication portion includes a first fluid passage fluidly connecting the first interface and the third interface, a second fluid passage fluidly connecting the second interface and the fourth interface, and a third fluid passage fluidly connecting the first fluid passage and the second fluid passage; and

[0036] The hydraulic fluid from the first port flows through the third fluid passage and the heat exchanger at the same time and then returns to the second port.

[0037] According to the above aspect of the present invention, preferably, the control valve further comprises a second communication portion, the second communication portion comprises a fourth fluid passage fluidly connecting the first interface and the third interface, and a fifth fluid passage fluidly connecting the second interface and the fourth interface, and

[0038] wherein the control valve is capable of switching between the first connecting portion and the second connecting portion, and when the temperature of the fluid at the first interface exceeds a first temperature threshold, the control valve switches to the second connecting portion, and

[0039] The hydraulic fluid from the first port flows through the heat exchanger and then returns to the second port.

[0040] According to the above aspect of the present invention, preferably, the control valve further comprises a third communication portion, and the third communication portion comprises a sixth fluid passage fluidly connecting the second interface and the fourth interface, and a seventh fluid passage fluidly connecting the first interface and the sixth fluid passage, and

[0041] wherein the control valve is capable of switching between the second connecting portion and the third connecting portion, and when the temperature of the fluid at the first interface exceeds a second temperature threshold, the control valve switches to the third connecting portion, and

[0042] The hydraulic fluid from the first port flows through the seventh fluid passage and then returns to the second port.

[0043] Therefore, the heat dissipation control device of the present invention can meet the use requirements, overcome the shortcomings of the prior art and achieve the predetermined purpose. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to further clearly describe the heat dissipation control device according to the present invention, the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. In the accompanying drawings:

[0045] Figure 1 is a schematic diagram of a heat dissipation control device according to a non-limiting embodiment of the present invention, showing a control valve in a first state;

[0046] Figure 2 is another schematic diagram of a heat dissipation control device according to a non-limiting embodiment of the present invention, showing the control valve in a second state; and

[0047] Figure 3 is another schematic diagram of a heat dissipation control device according to a non-limiting embodiment of the present invention, showing that the control valve is in a third state.

[0048] The above drawings are merely schematic and are not drawn strictly to scale.

[0049] List of reference numerals in the figures and embodiments:

[0050] 100- Heat dissipation control device, including;

[0051] 10-Control valve, including;

[0052] 11-a first connecting portion, comprising:

[0053] 111 - a first fluid passage;

[0054] 112 - second fluid passage;

[0055] 113 - third fluid passage;

[0056] 12- A second connecting portion, comprising:

[0057] 121 - fourth fluid passage;

[0058] 122 - fifth fluid passage;

[0059] 13- A third connecting portion, comprising;

[0060] 131 - sixth fluid passage;

[0061] 132 - seventh fluid passage;

[0062] 20- heat exchanger;

[0063] 30-Hydraulic fluid tank side interface;

[0064] 31-first interface;

[0065] 32-second interface;

[0066] 40-heat exchanger side interface;

[0067] 41-third interface;

[0068] 42- fourth interface;

[0069] 50 a first one-way valve;

[0070] 60 - second one-way valve;

[0071] 70-Safety valve. DETAILED DESCRIPTION

[0072] It should be understood that, unless expressly stated otherwise, the present invention may adopt various alternative orientations and step sequences. It should also be understood that the specific devices shown in the drawings and described in the specification are merely exemplary embodiments of the inventive concepts disclosed and defined herein. Therefore, unless otherwise expressly stated, the specific orientations, directions or other physical characteristics of the various embodiments disclosed should not be considered as limiting.

[0073] Figure 1-Figure 3 is a schematic diagram of different states of the heat dissipation control device 100 according to a non-limiting embodiment of the present invention.

[0074] As shown, a heat dissipation control device 100 for use in a hydraulic system may include a control valve 10 and a heat exchanger 20 .

[0075] The control valve 10 may be fluidly connected between a hydraulic fluid tank and a heat exchanger 20 of a hydraulic system, and may include at least four fluid interfaces, such as a first interface 31 , a second interface 32 , a third interface 41 , and a fourth interface 42 shown in the drawings.

[0076] Typically, the heat exchanger 20 is arranged downstream of the control valve 10, that is, under normal circumstances, the hydraulic fluid from the hydraulic fluid tank first flows through the control valve 10, that is, first enters the first interface 31 of the control valve 10, and then enters the heat exchanger 20 via the third interface 41, or alternatively, the hydraulic fluid only flows through the control valve 10, and not only the heat exchanger 20.

[0077] As shown and as a non-limiting example, the first port 31 and the second port 32 may be used for fluid connection between the control valve 10 and the hydraulic fluid tank, and thus may also be referred to as hydraulic fluid tank-side ports 30 .

[0078] The third port 41 and the fourth port 42 may be used for fluid connection between the control valve 10 and the heat exchanger 20 , and therefore may also be referred to as heat exchanger-side ports 40 .

[0079] The hydraulic fluid tank can store hydraulic fluid such as hydraulic oil, for example, and the hydraulic fluid can be pumped to the first port 31 via a pumping mechanism (not shown). The first port can also be referred to as a hydraulic fluid inlet. The hydraulic fluid can enter the control valve 10 via the first port 31 .

[0080] like Figure 1 As shown in detail in the figure, the control valve 10 can also include a first connecting part 11, the first connecting part includes a first fluid passage 111 fluidly connecting the first interface 31 and the third interface 41, a second fluid passage 112 fluidly connecting the second interface 32 and the fourth interface 42, and a third fluid passage 113 fluidly connecting the first fluid passage 111 and the second fluid passage 112.

[0081] Herein, a state in which the first communication portion 11 of the control valve 10 is functional may be referred to as a first state of the control valve 10. In the first state, the hydraulic fluid may flow from the first port 31 to the second port 32 via two fluid paths, respectively.

[0082] The first fluid path is, for example, that the incoming hydraulic fluid first flows from the first port 31 to the first fluid passage 111 , then flows to the second fluid passage 112 via the third fluid passage 113 , and finally returns to the hydraulic fluid tank from the second port 32 .

[0083] The second fluid path is, for example, that the incoming hydraulic fluid first flows from the first port 31 to the first fluid passage 111 , then flows to the second fluid passage 112 via the heat exchanger 20 , and finally returns to the hydraulic fluid tank from the second port 32 .

[0084] It can be seen that in the first state, the third fluid passage 113 is connected in parallel with the heat exchanger 20 between the first fluid passage 111 and the second fluid passage 112 .

[0085] Figure 1The first state shown may correspond to a state in which the hydraulic system is operating normally, when the temperature of the hydraulic fluid such as hydraulic oil is within the normal operating range, and the hydraulic fluid of the hydraulic circuit passes through the first interface 31 (e.g., oil inlet) through the illustrated valve position and returns to the second interface 32 (e.g., oil return port) via two fluid paths. Since the flow resistance of the circuit through the heat exchanger 20 is relatively large, in this state, most of the hydraulic fluid (through the optional one-way valve 50) returns to the second interface 32, and a small part passes through the heat exchanger 20 and returns to the second interface 32. Compared with the conventional solution, the downstream pipeline of the control valve 10 for heat dissipation and the heat exchanger 20 according to the non-limiting embodiment of the present invention is simpler to refuel, clean and exhaust, and can be completed at normal fluid or oil temperature.

[0086] In this case, preferably, the control valve 10 may further include a first one-way valve 50 . The first one-way valve 50 may be disposed on the third fluid passage 113 to allow the fluid to flow from the first fluid passage 111 to the second fluid passage 112 in one direction.

[0087] It should be understood that the first one-way valve 50 can be any type of one-way valve as long as it can achieve the desired flow direction control.

[0088] like Figure 2 As shown in detail in the figure, the control valve 10 can also include a second connecting part 12, the second connecting part includes a fourth fluid passage 121 fluidly connecting the first interface 31 and the third interface 41, and a fifth fluid passage 122 fluidly connecting the second interface 32 and the fourth interface 42, and wherein the control valve 10 is capable of switching between the first connecting part 11 and the second connecting part 12.

[0089] Herein, the state in which the second communication portion 12 of the control valve 10 is functional may be referred to as the second state of the control valve 10. In the second state, the hydraulic fluid may flow from the first port 31 to the second port 32 via only one fluid path.

[0090] Specifically, the fluid path is, for example: the incoming hydraulic fluid first flows from the first interface 31 to the fourth fluid passage 121, then enters the heat exchanger 20 via the third interface 41, and after heat exchange in the heat exchanger 20, flows to the fifth fluid passage 122 via the fourth interface 42, and finally returns to the hydraulic fluid tank from the second interface 32.

[0091] According to a preferred embodiment of the present invention, the control valve 10 may also be configured to switch to the second communication portion 12 when the temperature of the fluid at the first interface 31 exceeds a first temperature threshold.

[0092] This second state can be mainly used, for example, when the aircraft ambient temperature is high and the hydraulic system works frequently, or under fault conditions, which will cause the temperature of the aircraft hydraulic fluid (such as hydraulic oil) to rise, and the increase in the temperature of the hydraulic fluid will cause many adverse effects. At this time, the hydraulic system needs to actively dissipate heat to suppress the increase in the temperature of the hydraulic fluid. When the temperature of the hydraulic fluid rises to the preset threshold value of the heat dissipation control device 100 of the present invention, the control valve 10 (such as an internal thermistor solenoid valve) drives the valve block to move to the middle position, that is, the second connecting part 12 works. At this time, the overheated hydraulic fluid passes through the fourth fluid passage 121 and the fifth fluid passage 122 in the middle position of the valve block, and uses the heat exchanger 20 to exchange heat with the cooling medium (such as fuel), so as to achieve the purpose of heat dissipation and thus suppress the increase in the temperature of the hydraulic fluid.

[0093] Unlike the first state in which only a small amount of hydraulic fluid flows through the heat exchanger for heat exchange (eg, to cool the hydraulic fluid), in the second state, all of the hydraulic fluid flows through the heat exchanger for heat exchange, thereby being able to control the temperature of the hydraulic fluid with great efficiency.

[0094] As a non-limiting example and as Figure 3 As shown, the control valve 10 may also include a third connecting part 13, and the third connecting part includes a sixth fluid passage 131 fluidly connecting the second interface 32 and the fourth interface 42, and a seventh fluid passage 132 fluidly connecting the first interface 31 and the sixth fluid passage 131, and wherein the control valve 10 is capable of switching between the second connecting part 12 and the third connecting part 13, and when the fluid temperature at the first interface 31 exceeds a second temperature threshold, the control valve 10 switches to the third connecting part 13.

[0095] Herein, the state in which the third communication portion 13 of the control valve 10 functions may be referred to as the third state of the control valve 10. In the third state, the hydraulic fluid may flow from the first port 31 to the second port 32 via only one fluid path.

[0096] The third state is mainly for example for the following situations: when the heat exchanger 20 is arranged in the fuel tank and the fuel is used as the cooling medium, at this time, if the temperature of the hydraulic fluid continues to rise to the fuel tank explosion warning threshold, the hydraulic pipeline and the heat exchanger 20 laid in the fuel tank of the hydraulic system become a potential risk of explosion of the aircraft fuel tank. Such a situation is generally caused by a fault in the hydraulic system. The heat dissipation control device 100 of the present invention can make the temperature of the hydraulic oil lower than the explosion-proof threshold. For example, the control valve 10 (such as an internal thermistor solenoid valve) can drive the valve block to move to the third connecting portion 13 to take effect (i.e., as Figure 3At this time, the extremely overheated hydraulic fluid directly returns to the hydraulic fluid tank through the sixth fluid passage 131 and the seventh fluid passage 132 of the third connecting portion 13 without passing through the heat exchanger 20, that is, without passing through the fuel tank.

[0097] In addition, if Figure 3 As shown in detail in the figure, in the third state, the fourth interface 42 is connected to the second interface 32 by means of the sixth fluid passage 131, so that the hydraulic fluid remaining in the heat exchanger 20 can still flow to the second interface 32, so that the hydraulic fluid in the heat exchanger 20 can flow out smoothly when it expands due to overheating for various reasons, thereby further ensuring the safety of the heat dissipation control device 100.

[0098] From the above reference Figures 1 to 3 It can be seen from the non-limiting embodiment of the heat dissipation control device 100 described that the control valve 10 can be a three-position four-way valve, and as a non-limiting embodiment, the control valve 10 can preferably be a thermal solenoid valve, so that the valve position action can be automatically realized by the temperature of the hydraulic fluid or oil at the first interface 31 (i.e., the oil inlet) driving the solenoid valve thermal sensitive structure.

[0099] However, it should be understood that those skilled in the art may conceive of other types of control valves 10 as long as they can achieve the desired flow control path.

[0100] As a non-limiting embodiment, the heat dissipation control device 100 may also include a safety valve 70 arranged between the first fluid passage 111 and the second fluid passage 112, so that the safety valve 70 can directly connect the first interface 31 and the second interface 32 to prevent unloading when a sudden increase in flow or a downstream failure causes local overpressure.

[0101] As a non-limiting example, the second temperature threshold may be greater than the first temperature threshold.

[0102] In addition, it should be understood that although only the switching from the first state to the second state and the switching from the second state to the third state is described above, it should be understood that the reverse switching is also included in the embodiments of this invention. For example, when the temperature of the fluid at the first interface 31 drops below the second temperature threshold, the control valve 10 can also switch from the third communication part 13 to the third communication part 12. And further, when the temperature of the fluid at the first interface 31 drops below the first temperature threshold, the control valve 10 can also switch from the second communication part 12 to the first communication part 11.

[0103] As a non-limiting embodiment, preferably, the control valve 10 may further include a second one-way valve 60 , which may be disposed on the seventh fluid passage 132 to allow the fluid to flow from the first interface 31 to the seventh fluid passage 132 in one direction, for example.

[0104] As a non-limiting example, the heat dissipation control device 100 can be used in an aircraft hydraulic system, and the heat exchanger 20 can be a hydraulic-fuel heat exchanger disposed in an aircraft fuel tank, for example, the heat exchanger 20 is at least partially immersed in fuel. In this case, the fuel in the fuel tank can be used as a cooling medium for heat exchange with hydraulic fluid (e.g., hydraulic fluid with a higher temperature).

[0105] As used herein, an aircraft may include various aviation aircraft, such as airplanes (passenger aircraft, cargo aircraft, etc.), and may also include various aerospace vehicles (such as space shuttles, cargo or passenger spacecraft, etc.).

[0106] In this embodiment, the second temperature threshold may be set mainly with reference to a fuel safety temperature threshold in the fuel tank.

[0107] As a non-limiting embodiment, the heat dissipation control device 100 may further include a safety valve 70 disposed between the first fluid passage 111 and the second fluid passage 112. The safety valve may be, for example, a relief valve, which may ensure that when the flow rate is too large or the downstream pipeline is blocked, the overheated hydraulic fluid can smoothly return to, for example, the hydraulic fluid tank. Of course, those skilled in the art may also conceive of other types of safety devices to ensure that the heat dissipation control device 100 can still operate normally when the flow rate is too large or the downstream pipeline is blocked.

[0108] As another non-limiting embodiment, the present invention also discloses a heat dissipation control method, which can be used to control the temperature of hydraulic fluid in a hydraulic system, and the method can optionally include the following steps:

[0109] First, the method includes providing a control valve 10 and a heat exchanger 20;

[0110] Next, the method includes fluidly connecting the control valve 10 between the hydraulic fluid tank and the heat exchanger 20;

[0111] As a preferred embodiment, the control valve 10 may include a first interface 31 and a second interface 32 fluidly connected between the control valve 10 and the hydraulic fluid tank, and a third interface 41 and a fourth interface 42 fluidly connected between the control valve 10 and the heat exchanger 20 .

[0112] Preferably, the control valve 10 may also include a first connecting portion 11, the first connecting portion including a first fluid passage 111 fluidly connecting the first interface 31 and the third interface 41, a second fluid passage 112 fluidly connecting the second interface 32 and the fourth interface 42, and a third fluid passage 113 fluidly connecting the first fluid passage 111 and the second fluid passage 112.

[0113] In addition, the method can also allow the hydraulic fluid from the first interface 31 to flow through the third fluid passage 113 and the heat exchanger 20 at the same time and then return to the second interface 32 .

[0114] This method allows the hydraulic fluid from the first port 31 to flow through the parallel heat exchanger 20 and the third fluid passage 113 and return to the second port 32 .

[0115] Therefore, convenient heat dissipation control can be achieved with the help of the heat exchanger 20, and it is also convenient for the heat exchanger 20 to be injected with hydraulic fluid, cleaned and exhausted at room temperature.

[0116] As a non-limiting embodiment, the control valve 10 may further include a second communication portion 12, the second communication portion including a fourth fluid passage 121 fluidly connecting the first interface 31 and the third interface 41, and a fifth fluid passage 122 fluidly connecting the second interface 32 and the fourth interface 42, wherein the control valve 10 is capable of switching between the first communication portion 11 and the second communication portion 12, and when the fluid temperature at the first interface 31 exceeds a first temperature threshold, the control valve 10 switches to the second communication portion 12, and

[0117] In addition, the method can also allow the hydraulic fluid from the first port 31 to flow through the heat exchanger 20 and then return to the second port 32 .

[0118] As a non-limiting embodiment, the control valve 10 further includes a third communication portion 13, and the third communication portion includes a sixth fluid passage 131 fluidly connecting the second interface 32 and the fourth interface 42, and a seventh fluid passage 132 fluidly connecting the first interface 31 and the sixth fluid passage 131, and wherein the control valve 10 is switchable between the second communication portion 12 and the third communication portion 13, and when the fluid temperature at the first interface 31 exceeds a second temperature threshold, the control valve 10 switches to the third communication portion 13, and

[0119] In addition, the method can also allow the hydraulic fluid from the first port 31 to flow through the seventh fluid passage 132 and then return to the second port 32 .

[0120] In summary, the method according to the preferred embodiment of the present invention can control the flow path of the hydraulic fluid so that in the first state, the hydraulic fluid partially flows through the heat exchanger 20, in the second state, the hydraulic fluid completely flows through the heat exchanger 20, and in the third state, the hydraulic fluid does not flow into the heat exchanger 20 at all, thereby being able to perform heat dissipation control according to the desired operating mode.

[0121] As used herein, the terms "upstream", "downstream", "left side", "right side" indicating position or orientation, and the terms "first", "second", etc. used to indicate order are only intended to enable those of ordinary skill in the art to better understand the concept of the present invention shown in the form of a preferred embodiment, and are not intended to limit the present invention. Unless otherwise specified, all orders, positions or orientations are only used for the purpose of distinguishing one element / component / structure from another element / component / structure, and unless otherwise specified, do not represent any specific order, order of operation, direction or orientation. For example, in an alternative embodiment, the "first communication portion" may be the "second communication portion", and the "first interface" may alternatively refer to the "second interface".

[0122] In summary, the heat dissipation control device 100 according to the embodiment of the present invention overcomes the shortcomings of the prior art and achieves the intended purpose of the invention.

[0123] Although the heat dissipation control device of the present invention is described above in conjunction with the preferred embodiments, those skilled in the art should recognize that the above examples are only for illustration and cannot be used as limitations of the present invention. Therefore, various modifications and variations can be made to the present invention within the spirit of the claims, and these modifications and variations will fall within the scope required by the claims of the present invention.

Claims

1. A heat dissipation control device (100), the heat dissipation control device being used in a hydraulic system and comprising: A control valve (10) and a heat exchanger (20), wherein The control valve (10) is fluidly connected between a hydraulic fluid tank of the hydraulic system and the heat exchanger (20), and comprises: a first interface (31) and a second interface (32) fluidly connected between the control valve (10) and the hydraulic fluid tank, and A third interface (41) and a fourth interface (42) are fluidly connected between the control valve (10) and the heat exchanger (20), The control valve (10) further comprises a first connecting portion (11), the first connecting portion comprising a first fluid passage (111) fluidically connecting the first interface (31) and the third interface (41), a second fluid passage (112) fluidically connecting the second interface (32) and the fourth interface (42), and a third fluid passage (113) fluidically connecting the first fluid passage (111) and the second fluid passage (112), so that the hydraulic fluid from the first interface (31) simultaneously flows through the third fluid passage (113) and the heat exchanger (20) and then returns to the second interface (32).

2. The heat dissipation control device (100) according to claim 1, characterized in that: The control valve (10) further comprises a second connecting portion (12), the second connecting portion comprising a fourth fluid passage (121) fluidically connecting the first interface (31) and the third interface (41), and a fifth fluid passage (122) fluidically connecting the second interface (32) and the fourth interface (42), and The control valve (10) is capable of switching between the first connecting portion (11) and the second connecting portion (12).

3. The heat dissipation control device (100) according to claim 1, characterized in that: The control valve (10) further comprises a first one-way valve (50), which is arranged on the third fluid passage (113) to allow fluid to flow from the first fluid passage (111) to the second fluid passage (112) in one direction.

4. The heat dissipation control device (100) according to claim 2, characterized in that: The control valve (10) further comprises a third connecting portion (13), wherein the third connecting portion comprises a sixth fluid passage (131) fluidically connecting the second interface (32) and the fourth interface (42), and a seventh fluid passage (132) fluidically connecting the first interface (31) and the sixth fluid passage (131), and The control valve (10) is capable of switching between the second connecting portion (12) and the third connecting portion (13).

5. The heat dissipation control device (100) according to claim 4, characterized in that: When the temperature of the fluid at the first interface (31) exceeds a first temperature threshold, the control valve (10) switches to the second connecting part (11), and when the temperature of the fluid at the first interface (31) exceeds a second temperature threshold, the control valve (10) switches to the third connecting part (12), wherein the second temperature threshold is greater than the first temperature threshold.

6. The heat dissipation control device (100) according to claim 4, characterized in that: The control valve (10) further comprises a second one-way valve (60), which is arranged on the seventh fluid passage (132) to allow the fluid to flow from the first interface (31) to the seventh fluid passage (132) in one direction.

7. The heat dissipation control device (100) according to any one of claims 1 to 6, characterized in that: The heat dissipation control device (100) is used in an aircraft hydraulic system, and the heat exchanger (20) is a hydraulic-fuel heat exchanger arranged in an aircraft fuel tank.

8. A heat dissipation control method, the method being used to control the temperature of a hydraulic fluid in a hydraulic system and comprising the following steps: Providing a control valve (10) and a heat exchanger (20); The control valve (10) is fluidically connected between a hydraulic fluid tank of the hydraulic system and the heat exchanger (20), and the control valve (10) comprises: a first interface (31) and a second interface (32) fluidly connected between the control valve (10) and the hydraulic fluid tank, and A third interface (41) and a fourth interface (42) are fluidly connected between the control valve (10) and the heat exchanger (20), The control valve (10) further comprises a first connecting portion (11), the first connecting portion comprising a first fluid passage (111) fluidically connecting the first interface (31) and the third interface (41), a second fluid passage (112) fluidically connecting the second interface (32) and the fourth interface (42), and a third fluid passage (113) fluidically connecting the first fluid passage (111) and the second fluid passage (112); and The hydraulic fluid from the first interface (31) flows through the third fluid passage (113) and the heat exchanger (20) at the same time and then returns to the second interface (32).

9. The heat dissipation control method according to claim 8, characterized in that: The control valve (10) further comprises a second connecting portion (12), the second connecting portion comprising a fourth fluid passage (121) fluidically connecting the first interface (31) and the third interface (41), and a fifth fluid passage (122) fluidically connecting the second interface (32) and the fourth interface (42), and The control valve (10) is capable of switching between the first connecting portion (11) and the second connecting portion (12), and when the temperature of the fluid at the first interface (31) exceeds a first temperature threshold, the control valve (10) switches to the second connecting portion (12); and The hydraulic fluid from the first port (31) flows through the heat exchanger (20) and then returns to the second port (32).

10. The heat dissipation control method according to claim 9, characterized in that: The control valve (10) further comprises a third connecting portion (13), wherein the third connecting portion comprises a sixth fluid passage (131) fluidically connecting the second interface (32) and the fourth interface (42), and a seventh fluid passage (132) fluidically connecting the first interface (31) and the sixth fluid passage (131), and The control valve (10) is capable of switching between the second connecting portion (12) and the third connecting portion (13), and when the temperature of the fluid at the first interface (31) exceeds a second temperature threshold, the control valve (10) switches to the third connecting portion (13); and The hydraulic fluid from the first port (31) flows through the seventh fluid passage (132) and then returns to the second port (32).

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