Six-way valve and cooling and heating combined heat recovery automobile air conditioning system using same

Abstract

The six-way valve comprises a first valve body and a second valve body which are consistent in structure, and the six-way valve has a heating mode, a refrigerating mode and a closing mode; the cold and heat combined heat supply recovery automobile air conditioning system comprises a balance tank, a cold and heat source assembly, a power assembly, at least one differential release branch located outside an automobile and at least one temperature adjusting branch located in the automobile, and the six-way valve is used for the differential release branch and / or the temperature adjusting branch. Compared with a traditional automobile air conditioning system, the automobile air conditioning system has the beneficial effects that the mode that an electric heating system and a refrigerating system are combined is abandoned, the product complexity can be reduced, and the cost of the whole automobile is reduced; compared with an existing heat pump air conditioning system, the heat pump air conditioning system is simple in structure and free of complex pipeline design, independent cooling and heating can be achieved in all cold (heat) using scenes, and the requirement for an ultra-large-range temperature zone can be met.

Description

Technical Field

[0001] The invention relates to the field of vehicle refrigeration systems, in particular to a six-way valve and a combined cooling and heating heat recovery automobile air-conditioning system using the six-way valve. Background Art

[0002] In the design of electric vehicle air conditioning systems, the current traditional methods mostly refer to the air conditioning design of internal combustion engine vehicles. Existing electric vehicle air conditioning systems mainly rely on electric compressors to work, with batteries as the main power source. The compressor achieves the cooling and dehumidification functions in the car by compressing the refrigerant, while heating is usually achieved through electric heaters or heat pump systems. This traditional air conditioning design method has several significant shortcomings in electric vehicles: 1. High energy consumption: The endurance of electric vehicles is highly dependent on the power of the battery, and the traditional air conditioning system consumes a lot of electricity during the cooling and heating process, which directly reduces the vehicle's range. Especially under extreme temperature conditions, the high power consumption of air conditioning will significantly affect the actual driving distance of electric vehicles; 2. Insufficient thermal management: Battery thermal management is crucial to the overall performance and safety of electric vehicles. However, the synergy efficiency between traditional air conditioning systems and battery management systems is low, and it is difficult to effectively manage the temperature in the car and the battery temperature at the same time. There is a lot of room for improvement in the existing system in this regard; 3. Comfort issues: The temperature control accuracy and response speed of traditional air conditioning systems are not good in electric vehicles, especially under different driving conditions, the temperature control in the car is often not uniform. 4. Low integration: The current integration between the air conditioning system and other vehicle thermal management systems is low, which increases the complexity of the entire system and makes maintenance and troubleshooting more difficult. A more efficient integrated design can optimize the thermal management of the entire vehicle and improve energy efficiency.

[0003] The patent with the publication number of "CN220452779U" discloses "six-way valve and air conditioner". The six-way valve includes a valve body and a slider assembly. The valve body is provided with six channels connected to the inner cavity of the valve body. The slider assembly includes a first slider and a second slider. The first slider and the second slider can slide synchronously in the inner cavity of the valve body to adjust the on-off state of each channel. The six-way valve can selectively turn the refrigerant passage of the air conditioner, so that the refrigerant flow direction and the heat exchange medium flow direction in the outdoor heat exchanger and the indoor heat exchanger always maintain countercurrent heat exchange, achieving the effect of countercurrent heat exchange under all working conditions, and improving the year-round operation energy efficiency of the air conditioner. The focus of this solution is to optimize the heat exchange amount in the traditional four-way valve, always maintain the state of countercurrent heat exchange, and improve energy efficiency.

[0004] The patent with the publication number "CN105890226A" discloses "a water-source combined heat and cold water unit and its control method", including multiple refrigeration systems and automatic control systems, using innovative water source heating, combined heat and cold, graded heating and graded cooling to solve the problems of the current traditional combined heat and cold water units. However, this design does not reflect how the terminal cold scene switches between heating and cooling, and cannot achieve heat recovery mode, which does not meet the current national "energy conservation and emission reduction" policy and the requirements of building an energy-saving and environmentally friendly society.

[0005] Therefore, the present application proposes a six-way valve and a combined cooling and heating heat recovery automobile air-conditioning system using the six-way valve. Summary of the invention

[0006] The purpose of the present invention is to provide a six-way valve and a combined heat and cold supply and heat recovery automobile air-conditioning system using the six-way valve, wherein the six-way valve can achieve rapid switching between cooling and heating; the air-conditioning system simplifies and integrates the structure of the refrigerant side, and transmits heat and cold to each cooling (heating) scene in the car through the secondary loop system; in addition, each cooling (heating) scene is independent of each other, and different cooling (heating) scenes can be heated and cooled separately without affecting each other. Finally, when there are both heating and cooling requirements in the cooling (heating) scene, the system can also achieve heat recovery function, thereby reducing the energy consumption of the whole vehicle and improving system performance.

[0007] To achieve the above object, the present invention adopts the following technical solutions: A six-way valve, comprising a first valve body and a second valve body of identical structure, wherein two ends of the first valve body are respectively provided with a high-temperature pipeline outlet and a low-temperature pipeline outlet, and the middle of the first valve body is provided with a heat exchanger outlet, and two ends of the second valve body are respectively provided with a high-temperature pipeline inlet and a low-temperature pipeline inlet, and the middle of the second valve body is provided with a heat exchanger inlet; The first valve body is provided with a first slider capable of blocking a high-temperature pipeline outlet, a low-temperature pipeline outlet or a heat exchanger outlet, and the second valve body is provided with a second slider capable of blocking a high-temperature pipeline inlet, a low-temperature pipeline inlet or a heat exchanger inlet.

[0008] Preferably, an electromagnetic coil is disposed at the end of the first valve body, and a magnet attracted or repelled by the electromagnetic coil when energized is disposed in the first slider.

[0009] Preferably, the magnet is located at an end of the first slider close to the electromagnetic coil.

[0010] Preferably, an iron hoop capable of attracting a magnet is provided in the middle of the outer side of the first valve body.

[0011] Preferably, upper and lower bottoms are provided at both ends of the first sliding block to increase sealing performance.

[0012] Preferably, the present invention also provides a combined heat and cold supply and heat recovery automobile air-conditioning system, comprising a balancing tank, a heat and cold source component, a power component, at least one differential release branch located outside the vehicle and at least one temperature adjustment branch located inside the vehicle, wherein the differential release branch and / or the temperature adjustment branch use the aforementioned six-way valve.

[0013] Preferably, the cold and heat source assembly includes a compressor, a condenser, an expansion valve and an evaporator, and the power assembly includes a low-temperature pipeline circulation pump connected to the evaporator and a high-temperature pipeline circulation pump connected to the condenser; The medium flowing out from the low-temperature pipeline circulation pump flows along the low-temperature main pipeline and enters the temperature control branch and the differential release branch respectively, and finally flows back to the evaporator along the evaporator return liquid main pipeline. The medium flowing out from the high-temperature pipeline circulation pump flows along the high-temperature main pipeline and enters the temperature control branch and the differential release branch respectively, and finally flows back to the condenser along the condenser return liquid main pipeline.

[0014] Preferably, the balancing tank comprises a tank body, in which an insulating baffle is arranged, the insulating baffle divides the tank body into a low-temperature side and a high-temperature side which are not connected to each other, a low-temperature interface connected to the evaporator return liquid main line is opened at the bottom of the low-temperature side, and a high-temperature interface connected to the condenser return liquid main line is opened at the bottom of the high-temperature side.

[0015] Preferably, a balancing hole connecting the low-temperature side and the high-temperature side is opened on the upper part of the insulation baffle, an overflow hole is opened on the side wall of the tank body, the opening of the overflow hole is higher than the opening of the balancing hole, and a liquid filling port for adding material to the low-temperature side and / or the high-temperature side is also opened on the top of the tank body.

[0016] Preferably, the structures and pipeline directions of the differential release branch and the temperature adjustment branch are consistent, the temperature adjustment branch includes a heat exchanger and a six-way valve, and a heat exchanger liquid inlet pipeline and a heat exchanger liquid outlet pipeline are arranged between the heat exchanger and the six-way valve; A cold liquid inlet branch is provided between the low-temperature main line and the six-way valve, a cold liquid outlet branch is provided between the six-way valve and the evaporator return liquid main line, a hot liquid inlet branch is provided between the high-temperature main line and the six-way valve, and a hot liquid outlet branch is provided between the six-way valve and the condenser return liquid main line.

[0017] The beneficial effects of the present invention are: 1. The six-way valve is controlled by an electromagnetic coil and has a simple structure. It can freely switch between the three modes of cooling, heating and closing according to the use environment.

[0018] 2. By simplifying and modularizing the refrigerant side, high-pressure pipelines are integrated on the refrigerant side, which not only makes the car air-conditioning system safer and less prone to problems such as leakage and explosion, but also can significantly reduce the use of refrigerant.

[0019] 3. Compared with the traditional automobile air-conditioning system, it abandons the combination of electric heating and refrigeration systems, which can reduce product complexity and reduce the cost of the whole vehicle; compared with the current heat pump air-conditioning system, it has a simple structure, no complicated piping design, and can achieve independent cooling and heating for each cold (hot) scene, and can meet the needs of ultra-large temperature zones.

[0020] 4. By interconnecting the cold (hot) and hot (cold) usage scenarios of the entire vehicle and performing thermal management on the entire vehicle, it is not only possible to solve the current thermal management problem of battery packs in the electric vehicle field, but also to recycle and reuse heat and reduce the energy consumption of the entire vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a three-dimensional diagram of a six-way valve of the present invention; Figure 2 is a cross-sectional view of the six-way valve of the present invention in the cooling mode; Figure 3 is a cross-sectional view of the six-way valve of the present invention in the heating mode; Figure 4 is a cross-sectional view of the six-way valve of the present invention in a closed mode; Figure 5 is a cross-sectional view of the first valve body of the present invention (in closed mode); Figure 6 It is a three-dimensional diagram of the balancing tank of the present invention; Figure 7 It is a three-dimensional perspective view of the balancing tank of the present invention; Figure 8 It is a cross-sectional view of the balancing tank of the present invention; Fig. 9 A schematic diagram of the pipelines of the combined cooling and heating heat recovery automobile air conditioning system of the present invention; Fig.10 for Fig. 9 Schematic diagram of the piping for the first branch.

[0022] The drawings are only used for illustrative purposes and should not be construed as limitations on this patent. In order to better illustrate this embodiment, some parts of the drawings may be omitted, enlarged, or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted. DETAILED DESCRIPTION

[0023] The present invention is further described below in conjunction with the accompanying drawings.

[0024] Embodiment 1 like Figure 1 — Figure 4As shown, the six-way valve 1 of this embodiment comprises a first valve body 11 and a second valve body 12 of the same structure, a high-temperature pipeline outlet 111 and a low-temperature pipeline outlet 112 are respectively opened at two ends of the first valve body 11, a heat exchanger outlet 113 is opened in the middle of the first valve body 11, a high-temperature pipeline inlet 121 and a low-temperature pipeline inlet 122 are respectively opened at two ends of the second valve body 12, and a heat exchanger inlet 123 is opened in the middle of the second valve body 12; The first valve body 11 is provided with a first slider 114 for blocking the high-temperature pipeline outlet 111 or the low-temperature pipeline outlet 112 or the heat exchanger outlet 113 , and the second valve body 12 is provided with a second slider 124 for blocking the high-temperature pipeline inlet 121 or the low-temperature pipeline inlet 122 or the heat exchanger inlet 123 .

[0025] In the cooling mode, the first slider 114 and the second slider 124 move upward to block the high-temperature pipeline outlet 111 and the high-temperature pipeline inlet 121 respectively. Cold water enters the second valve body 12 from the low-temperature pipeline inlet 122 and then enters the heat exchanger from the heat exchanger inlet 123. Then, it enters the first valve body 11 from the heat exchanger outlet 113 and flows out from the low-temperature pipeline outlet 112 for circulation. In this process, the low-temperature medium continues to flow in the heat exchanger and transfers the cold to the cooling scene. In the heating mode, the first slider 114 and the second slider 124 move downward to block the low-temperature pipeline outlet 112 and the low-temperature pipeline inlet 122 respectively. The hot water enters the second valve body 12 from the high-temperature pipeline inlet 121 and then enters the heat exchanger from the heat exchanger inlet 123. Then, it enters the first valve body 11 from the heat exchanger outlet 113 and flows out from the high-temperature pipeline outlet 111 for circulation. In this process, the high-temperature medium continues to flow in the heat exchanger and transfers heat to the heat-using scene. In the closed mode, the first slider 114 and the second slider 124 move to the middle of the first valve body 11 and the second valve body 12 respectively, blocking the heat exchanger outlet 113 and the heat exchanger inlet 123 respectively, blocking the flow of the medium in the heat exchanger, and stopping the medium from passing through the heat exchanger to exchange heat with the cold (hot) scene.

[0026] In other embodiments, the positions of the high-temperature pipeline outlet 111 and the low-temperature pipeline outlet 112 of the first valve body 11 can be changed, such as opening the low-temperature pipeline outlet 112 at the upper part and the high-temperature pipeline outlet 111 at the lower part, and the second valve body 12 is similar thereto.

[0027] like Figure 5As shown, an electromagnetic coil 13 is provided at the end of the first valve body 11, and a magnet 116 is provided in the first slider 114 to be attracted or repelled by the electromagnetic coil 13 when it is energized. An iron hoop 14 is provided in the middle of the outer side of the first valve body 11 to attract the magnet 116. The position of the iron hoop needs to meet the requirement that when the electromagnetic coil 13 is not energized, the magnet 116 drives the slider to move to the middle position of the first valve body 11 under the attraction of the iron hoop 14, and completely blocks the heat exchanger outlet 113 in the middle thereof. When the electromagnetic coil 13 is energized, the magnetic poles of the magnetic field generated by the electromagnetic coil can change according to the direction of the current. In this embodiment, when the current is energized in the forward direction, the magnetic poles on the side of the first slider 114 in the magnetic field generated by the electromagnetic coil 13 are the same as the magnetic poles on the side of the magnet 116 in the first slider 114 close to the electromagnetic coil 13, generating a repulsive effect, and the first slider 114 moves away from the electromagnetic coil 13, thereby blocking the high-temperature pipeline outlet 111; when the current is energized in the reverse direction, an attractive effect is generated, and the first slider 114 moves toward the direction close to the electromagnetic coil 13, thereby blocking the low-temperature pipeline outlet 112. During the power-on process, the attractive force or repulsive force generated by the electromagnetic coil 13 is greater than the attractive force of the iron hoop 14 on the magnet 116, so that it can overcome the attractive force of the iron hoop 14 on the magnet 116 and move.

[0028] In the second valve body 12 , the movement principle and movement process of the second slider 124 are consistent with those of the first valve body 11 , and will not be described in detail in this embodiment.

[0029] The magnet 116 is located at the end of the first slider 114 close to the electromagnetic coil 13 . When the electromagnetic coil 13 is energized, it can more effectively push the first slider 114 to move.

[0030] Upper and lower bottoms 115 are provided at both ends of the first sliding block 114 to improve sealing performance.

[0031] In this embodiment, the first valve body 11 and the second valve body 12 are composed of two hollow cylinders with exactly the same structure. Interfaces (i.e., high-temperature pipeline outlet 111, low-temperature pipeline outlet 112, heat exchanger outlet 113, etc.) are opened on both ends of the valve body and the middle side wall. The inner diameter of the interface should be smaller than the inner diameter of the hollow cylinder of the valve body to prevent the slider (i.e., the first slider 114, the second slider 124) from shifting and sliding out of the valve body. The material of the valve body is strictly prohibited from selecting materials that can be attracted by magnets, and materials with low thermal expansion coefficients should be selected as much as possible to avoid affecting the performance of the equipment. In addition, during processing, the inner wall and both ends should be kept as smooth as possible to prevent leakage.

[0032] The overall shape of the slider is a cylinder, whose diameter is the same as the inner diameter of the valve body, and its height needs to ensure that when the slider moves to both ends, it cannot block the interface in the middle of the valve body, and when the slider moves to the middle, it must be able to completely cover the interface in the middle of the valve body.

[0033] The slider is made of a material with a low thermal expansion coefficient and a smooth surface. The upper and lower bottoms 115 of the slider can be made of rubber. When the slider moves to both ends in the valve body, it can ensure that the internal seal does not leak. The inside of the slider can be filled with lightweight insulation materials to reduce the heat exchange of fluids in the low-temperature flow path and the high-temperature flow path. The magnet is placed on one side of the slider. The principle of magnet placement is to ensure that the upper and lower bottom directions of the slider are respectively the positions where the magnetism is strongest.

[0034] If materials permit, the slider and upper and lower bottoms can also adopt an integrated structure. The slider side walls, slider upper and lower bottoms and the center insulation filler are all made of the same material, but the following points must be ensured: the side walls are smooth, the thermal expansion coefficient is low, the upper and lower bottoms can be securely sealed with both ends of the valve body without leakage, and the slider is as light as possible.

[0035] The iron hoop is fixed on one side of the valve body and can attract the magnet in the slider. The installation position needs to ensure that when the electromagnetic coil is not energized, the iron hoop attracts the magnet in the slider so that the slider can completely cover the interface in the middle of the valve body. The width of the iron hoop should not be too wide, which may cause a large offset of the slider; the width should not be too narrow, which will cause the iron hoop to fail to attract the slider, and then cause the valve body to fail to close.

[0036] The electromagnetic coil is located on one side of the valve body and is installed on the side close to the magnet in the slider. The winding direction of the electromagnetic coil on the cylinder of the two valve bodies is the same, that is, the direction of the magnetic field generated after power is turned on is consistent.

[0037] In actual applications, there should be no magnets, iron objects or other materials that can be attracted or repelled by magnets around the installation location of the six-way valve. The specific distance should be based on not affecting the normal operation of the reversing valve.

[0038] The six-way valve of this embodiment can not only realize the switching between the high-temperature flow path and the low-temperature flow path, but also realize the fine control of the flow path start and stop. Moreover, the control system of the system is greatly simplified. In this system, only one electromagnetic coil is used to realize the switching and start and stop of the flow path.

[0039] Embodiment 2 like Fig. 9 As shown, this embodiment also provides a combined heat and cold supply and heat recovery automobile air conditioning system, including a balance tank 2, a cold and heat source component 6, a power component 7, two differential release branches located outside the vehicle, and four temperature adjustment branches located inside the vehicle, the two differential release branches are respectively a first differential release branch 85 and a second differential release branch 86, and the four temperature adjustment branches are respectively a first branch 81, a second branch 82, a third branch 83, and a fourth branch 84. The differential release branch and the temperature adjustment branch both use the six-way valve 1 in the first embodiment.

[0040] The cold and hot source assembly 6 includes a compressor 64, a condenser 63, an expansion valve 62 and an evaporator 61, and the power assembly 7 includes a low-temperature pipeline circulation pump 71 connected to the evaporator 61 and a high-temperature pipeline circulation pump 72 connected to the condenser 63; in the present application, the high-pressure pipeline on the refrigerant side is integrated into the cold and hot source assembly, and the structure of the cold and hot source assembly is extremely simple and can be prepared in a modular manner, and is not prone to leakage, explosion and other problems. In addition, the refrigeration system using carbon dioxide as the refrigerant has the problem of excessive pressure and insecurity, and the refrigeration system using R290 as the refrigerant has the risk of being flammable and explosive. In the application of this system, the cold and hot source assembly is prepared in an integrated manner, which can make the system safer and more reliable. In addition, the refrigerant in this embodiment only flows in the cold and hot source assembly, which greatly reduces the amount of refrigerant used.

[0041] The medium flowing out from the low-temperature pipeline circulation pump 71 flows along the low-temperature main pipeline 73 and enters the temperature control branch and the differential release branch respectively, and finally flows back to the evaporator 61 along the evaporator return liquid main pipeline 65. The medium flowing out from the high-temperature pipeline circulation pump 72 flows along the high-temperature main pipeline 74 and enters the temperature control branch and the differential release branch respectively, and finally flows back to the condenser 63 along the condenser return liquid main pipeline 66.

[0042] like Figure 6 — Figure 8 As shown, the balance tank 2 includes a tank body 21, and a heat insulation baffle 27 is arranged in the tank body 21. The heat insulation baffle 27 divides the tank body into a low-temperature side and a high-temperature side that are not connected to each other. A low-temperature interface 22 connected to the evaporator return liquid main line 65 is opened at the bottom of the low-temperature side, and a high-temperature interface 23 connected to the condenser return liquid main line 66 is opened at the bottom of the high-temperature side. Filters 29 are arranged in the low-temperature interface 22 and the high-temperature interface 23 to prevent foreign matter from entering the evaporator return liquid main line 65 (i.e., the low-temperature flow path) or the condenser return liquid main line 66 (i.e., the high-temperature flow path) to cause system failure.

[0043] A balancing hole 28 connecting the low-temperature side and the high-temperature side is provided on the upper part of the heat-insulating baffle 27, an overflow hole is provided on the side wall of the tank body 21, and the opening of the overflow hole is higher than the opening of the balancing hole 28. A liquid adding port 26 for adding materials to the low-temperature side and / or the high-temperature side is also provided on the top of the tank body 21, in order to facilitate the addition of the medium used in the evaporator return liquid main line 65 or the condenser return liquid main line 66. A closing cover 25 is installed on the liquid adding port 26. After the liquid addition is completed, the closing cover 25 is tightened in time to prevent foreign matter from entering the tank.

[0044] When the system is running, the liquid medium inside it will expand due to heat and contract due to cold. In some cases, such as when the temperature difference between the high-temperature flow path and the low-temperature flow path is too large, the liquid level in the low-temperature flow path in the balancing tank 2 will drop significantly, while the liquid level in the high-temperature flow path will increase significantly, rising to the position of the balancing hole 28, and can enter the low-temperature flow path side through the balancing hole 28. When the system stops running, the liquid level on the high-temperature flow path side drops, while the liquid level on the low-temperature flow path side increases, rising to the position of the balancing hole 28, and the liquid can return to the high-temperature flow path side through the balancing hole 28 to balance the fluid volume on both sides.

[0045] An overflow hole is provided on the side wall of the tank body 21, and an overflow pipe 24 is connected to the overflow hole. The opening height of the overflow hole is greater than the height of the balancing hole 28. The overflow hole can balance the internal pipeline pressure of the system with the external atmospheric pressure. In addition, in special extreme cases, such as when the liquid level added on both sides of the tank is high and the car is exposed to the sun for a long time in summer, resulting in a substantial increase in the liquid temperature of the high-temperature flow path and the low-temperature flow path, the liquid levels on both sides rise substantially to exceed the height of the balancing hole 28 and reach the height of the overflow hole. The liquid can be discharged to the outside of the balancing tank 2 through the overflow pipe 24, thereby protecting the system.

[0046] The tank body 21, the closure cover 25 and the insulation baffle 27 should be made of heat-insulating materials to minimize the heat exchange between the low-temperature side fluid and the high-temperature side fluid in the tank, and between the fluid in the tank and the external environment. In the implementation and application, the balance tank must be placed at the highest position of the entire system, otherwise the liquid in the pipeline will overflow through the balance tank. In addition, the balance tank must be placed upright, that is, the liquid filling hole is always facing upward, and it is not allowed to tilt, turn upside down, or place it on its side. The overflow pipe must be facing downward to prevent the liquid from being blocked when it flows out.

[0047] During normal operation of the system, the low-temperature pipeline circulation pump 71 and the high-temperature pipeline circulation pump 72 continuously pump the liquid in the return pipes of the low-temperature pipeline and the high-temperature pipeline into the low-temperature main pipe and the high-temperature main pipe, and the liquid circulates in the low-temperature pipeline and the high-temperature pipeline. The balancing tank itself does not participate in the circulation of the fluid in the pipeline. Only when the liquid inside the balancing tank expands and contracts due to thermal expansion and contraction, causing the volume of the fluid in the pipeline to change, the balancing tank plays a role in compensating for the volume change caused by thermal expansion and contraction.

[0048] The structures and piping directions of the two differential release branches and the four temperature adjustment branches are the same, and only the heat exchange capacity of the heat exchanger is different. Fig.10 As shown, the first branch 81 includes a heat exchanger 811 and a six-way valve 1, and a heat exchanger liquid inlet pipeline 817 and a heat exchanger liquid outlet pipeline 818 are arranged between the heat exchanger 811 and the six-way valve 1; the heat exchanger liquid inlet pipeline 817 is connected to the heat exchanger inlet 123 of the second valve body 12, and the heat exchanger liquid outlet pipeline 818 is connected to the heat exchanger outlet 113 of the first valve body 11.

[0049] A cold liquid inlet branch 813 is provided between the low-temperature main line 73 and the six-way valve 1, and the cold liquid inlet branch 813 is connected to the low-temperature pipeline inlet 122 of the six-way valve 1; a cold liquid outlet branch 814 is provided between the six-way valve 1 and the evaporator return liquid main line 65, and the cold liquid outlet branch 814 is connected to the low-temperature pipeline outlet 112 of the six-way valve 1; a hot liquid inlet branch 815 is provided between the high-temperature main line 74 and the six-way valve 1, and the hot liquid inlet branch 815 is connected to the high-temperature pipeline inlet 121 of the six-way valve 1; a hot liquid outlet branch 816 is provided between the six-way valve 1 and the condenser return liquid main line 66, and the hot liquid outlet branch 816 is connected to the high-temperature pipeline outlet 111 of the six-way valve 1.

[0050] The system operation logic is as follows: First, the system receives the temperature adjustment demand of at least one temperature adjustment branch. Then, the high-temperature pipeline circulation pump and the low-temperature pipeline circulation pump in the power component are started, so that the fluid in the low-temperature pipeline and the high-temperature pipeline begin to circulate. Then, the cold and hot source components are started to cool down the fluid in the low-temperature pipeline and heat up the fluid in the high-temperature pipeline. At this point, the system has been fully started and can be adjusted according to the specific cooling or heating needs of the usage scenario.

[0051] Specific usage scenarios can be: All four temperature control branches are for heating demand: at this time, the six-way valves of the four temperature control branches are adjusted to the heating mode, so that the high-temperature pipeline fluid flows through the corresponding heat exchanger in the temperature control branch, and the heat is released into the use space. The six-way valves of the two differential release paths are adjusted to the cooling mode, so that the low-temperature pipeline fluid flows through the differential heat exchanger, and the cold is released to the external environment to form a balance. Suppose the heat exchange of the four temperature control branches and the heat exchange of the two differential release paths are Q1, Q2, Q3, Q4, Q5 and Q6 respectively, and Q1+Q2+Q3+Q4=Q5+Q6 must be satisfied. For example, this system is applied to electric buses, and the installation positions of the heat exchangers in the four temperature control branches are: battery pack, front of the bus, middle of the bus, and rear of the bus. When operating in the severe cold zone in winter, the four branches all start the heating mode.

[0052] The four temperature control branches all have cooling requirements: at this time, the four six-way valves are adjusted to the cooling mode, so that the low-temperature pipeline fluid flows through the heat exchanger to release the cold into the use space. The two differential release paths need to be adjusted to the heating mode, so that the high-temperature pipeline fluid flows through the differential heat exchanger to release the heat to the external environment to form a balance. Suppose the heat exchange of the four temperature control branches and the heat exchange of the two differential release paths are M1, M2, M3, M4, M5 and M6 respectively, and M1+M2+M3+M4=M5+M6 must also be satisfied. For example, this system is applied to high-end electric vehicles. The installation positions of the heat exchangers in the four temperature control branches are: front passenger seat, rear passenger seat, car refrigerator, and battery pack. In summer operation, the four branches all start the cooling mode.

[0053] If the first branch 81 and the second branch 82 are for heating demand, the third branch 83 and the fourth branch 84 are for cooling demand. For example, this system is applied to high-end electric vehicles, and the installation positions of the four branches are: front passenger seat, rear passenger seat, car refrigerator, and battery pack. In spring and autumn operation, the front and rear passengers in the car have heating demand, and the car refrigerator and battery pack have cooling demand. At this time, the six-way valves of the first branch 81 and the second branch 82 are adjusted to the heating mode, so that the high-temperature pipeline fluid flows through the heat exchanger, and the six-way valves of the third branch 83 and the fourth branch 84 are adjusted to the cooling mode, so that the low-temperature pipeline fluid flows through the heat exchanger. The modes of the first differential release branch 85 and the second differential release branch 86 need to be adjusted according to different situations.

[0054] Assume that the heat exchange of the four temperature regulating branches and the heat exchange of the two differential release paths are N1, N2, N3, N4, N5 and N6 respectively.

[0055] If N1+N2>N3+N4, the two differential release paths are adjusted to the cooling mode, so that the low-temperature pipeline fluid flows through the differential heat exchanger to release the cold energy to the external environment. It is necessary to satisfy N1+N2=N3+N4+N5+N6 to form a balance.

[0056] If N1+N2<N3+N4, the two differential release paths are adjusted to the heating mode, so that the high-temperature pipeline fluid flows through the differential heat exchanger to release heat to the external environment. It is necessary to satisfy N1+N2+N5+N6=N3+N4 to form a balance.

[0057] If N1+N2=N3+N4, the two differential release paths are adjusted to a closed state, and the system is then in balance.

[0058] The above are examples in which four cooling (heating) scenes are all in operation. When one or more cooling (heating) scenes are in the closed state, the above calculation logic is also applicable, the principle is the same, and no further description is given.

[0059] This embodiment takes four cooling (heating) scenarios as an example, and is also applicable to more or fewer cooling (heating) scenarios. The more balanced the cooling and heating scenarios are, the easier it is to maintain a balance. For example, when used in high-speed trains, it can provide cooling and heating needs for the carriages at the same time, provide hot water for the carriages, provide cooling for the cold storage in the dining car, and cool power facilities such as inverters.

[0060] In some embodiments, the differential release path may also be set at only one place. In this embodiment, two differential release paths are used, which can improve the stability of the system and can operate normally even if one of them fails. In addition, it is also helpful to realize the subsequent defrosting function. When the ambient temperature is below 0°C, the differential release branch may be frosted or iced during the operation of the system. When frosting occurs, one of the differential release branches is temporarily switched to the heating mode to defrost the heat exchanger. At the same time, the other differential release branch is still operating normally without affecting the normal operation of the system. When only one differential release branch is set in the system, cold energy may accumulate in the defrost mode, resulting in system damage.

[0061] The above embodiments do not impose any formal limitations on the shape, material, structure, etc. of the present invention. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are within the protection scope of the technical solution of the present invention.

[0062] In the description of the present invention, it is necessary to understand that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the protection content of the present invention.

[0063] If the words "first", "second", etc. are used in this document to limit components, those skilled in the art should know that the use of "first" and "second" is only to facilitate the description of the present invention and simplify the description. Unless otherwise stated, the above words have no special meaning.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein, but these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A six-way valve, comprising a first valve body and a second valve body of the same structure, characterized in that: The two ends of the first valve body are respectively provided with a high-temperature pipeline outlet and a low-temperature pipeline outlet, the middle of the first valve body is provided with a heat exchanger outlet, the two ends of the second valve body are respectively provided with a high-temperature pipeline inlet and a low-temperature pipeline inlet, and the middle of the second valve body is provided with a heat exchanger inlet; The first valve body is provided with a first slider capable of blocking a high-temperature pipeline outlet, a low-temperature pipeline outlet or a heat exchanger outlet, and the second valve body is provided with a second slider capable of blocking a high-temperature pipeline inlet, a low-temperature pipeline inlet or a heat exchanger inlet.

2. The six-way valve according to claim 1, characterized in that: An electromagnetic coil is disposed at the end of the first valve body, and a magnet attracted or repelled by the electromagnetic coil after power is supplied is disposed in the first slider.

3. The six-way valve according to claim 2, characterized in that: The magnet is located at the end of the first sliding block close to the electromagnetic coil.

4. The six-way valve according to claim 3, characterized in that: An iron hoop capable of attracting magnets is arranged in the middle of the outer side of the first valve body.

5. The six-way valve according to claim 2, characterized in that: The two ends of the first sliding block are provided with upper and lower bottoms for improving sealing performance.

6. Combined cooling and heating heat recovery automobile air conditioning system, characterized in that: It includes a balancing tank, a cold and hot source component, a power component, at least one differential release branch located outside the vehicle and at least one temperature adjustment branch located inside the vehicle. The differential release branch and / or the temperature adjustment branch use the six-way valve described in claims 1-5.

7. The combined cooling and heating heat recovery automobile air conditioning system according to claim 6, characterized in that: The cold and heat source assembly includes a compressor, a condenser, an expansion valve and an evaporator, and the power assembly includes a low-temperature pipeline circulation pump connected to the evaporator and a high-temperature pipeline circulation pump connected to the condenser; The medium flowing out from the low-temperature pipeline circulation pump flows along the low-temperature main pipeline and enters the temperature control branch and the differential release branch respectively, and finally flows back to the evaporator along the evaporator return liquid main pipeline. The medium flowing out from the high-temperature pipeline circulation pump flows along the high-temperature main pipeline and enters the temperature control branch and the differential release branch respectively, and finally flows back to the condenser along the condenser return liquid main pipeline.

8. The combined cooling and heating heat recovery automobile air conditioning system according to claim 7, characterized in that: The balancing tank comprises a tank body, in which a heat-insulating baffle is arranged, the heat-insulating baffle divides the tank body into a low-temperature side and a high-temperature side which are not connected to each other, a low-temperature interface connected to the main liquid return line of the evaporator is provided at the bottom of the low-temperature side, and a high-temperature interface connected to the main liquid return line of the condenser is provided at the bottom of the high-temperature side.

9. The combined cooling and heating heat recovery automobile air conditioning system according to claim 8, characterized in that: A balance hole connecting the low-temperature side and the high-temperature side is opened on the upper part of the insulation baffle, an overflow hole is opened on the side wall of the tank body, the opening of the overflow hole is higher than the opening of the balance hole, and a liquid filling port for adding material to the low-temperature side and / or the high-temperature side is also opened on the top of the tank body.

10. The combined cooling and heating heat recovery automobile air conditioning system according to claim 7, characterized in that: The structures and pipeline directions of the differential release branch and the temperature adjustment branch are consistent. The temperature adjustment branch includes a heat exchanger and a six-way valve. A heat exchanger liquid inlet pipeline and a heat exchanger liquid outlet pipeline are arranged between the heat exchanger and the six-way valve. A cold liquid inlet branch is provided between the low-temperature main line and the six-way valve, a cold liquid outlet branch is provided between the six-way valve and the evaporator return liquid main line, a hot liquid inlet branch is provided between the high-temperature main line and the six-way valve, and a hot liquid outlet branch is provided between the six-way valve and the condenser return liquid main line.

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