An energy storage expansion tank

Abstract

The present invention belongs to the technical field of expansion tanks, and specifically relates to an energy storage expansion tank, which comprises a tank body. The tank body is composed of a small shell and a large shell distributed up and down. A diaphragm is installed between the small shell and the large shell; a PP inner lining is installed on the upper side of the large shell; a partition layer is fixedly installed in the small shell; a pneumatic component capable of adjusting the air pressure between the partition layer and the diaphragm is installed in the cavity above the partition layer; when coolant with external pressure enters the expansion tank, the pressure of the coolant in the expansion tank increases, the diaphragm is squeezed and deformed, and the gas in the cavity between the diaphragm and the partition layer is compressed. After the gas is compressed, its volume becomes smaller and the pressure rises. At this time, the pneumatic component works to pump the gas in the cavity between the diaphragm and the partition layer into the cavity above the partition layer, ensuring that the pressure in the cavity between the diaphragm and the partition layer does not change too much; the pressure pulsation amplitude is small, reducing the impact of large-amplitude pressure pulsation on the system.

Description

Technical Field

[0001] The present invention relates to the technical field of expansion tanks, and particularly to an energy storage expansion tank. Background Art

[0002] In the new energy field, such as new energy vehicles, wind power, etc., liquid cooling systems are used to maintain the working temperature. One of the key components in the liquid cooling system is the diaphragm expansion tank, which has two cavities inside, one for coolant and one for gas. The working principle of the expansion tank involves the relationship between gas and coolant. When coolant with external pressure enters the expansion tank airbag, the gas sealed in the tank is compressed. After the gas is compressed, its volume becomes smaller and the pressure rises until the gas pressure in the expansion tank is the same as the coolant pressure, and then the coolant stops flowing. When the coolant cools down and the pressure decreases, the gas pressure in the expansion tank is greater than the coolant pressure. At this time, the coolant expands and squeezes the coolant in the airbag to supplement the system. It has the functions of storing coolant, regulating the pressure of the cooling system, and supplementing coolant.

[0003] The following problems also exist in the use of the expansion tank:

[0004] First, the expansion tank is generally formed by steel plates. The coolant is a mixture composed of water and ethylene glycol, which is corrosive to the steel plates, and the service life of the expansion tank is affected.

[0005] Second, when there are impurities in the coolant, an impurity layer will adhere inside the expansion tank. Since the expansion tank generally has only one pipe orifice, it is not easy to wash it with high-pressure water. If washed with high-pressure water, the water entering is not easy to drain, and a rapid impact water flow inside the tank cannot be achieved, and a good cleaning effect cannot be obtained.

[0006] Third, when the cooling system absorbs a large amount of heat, when the coolant expands due to heat, the pressure in the system rises. After the rise, it exerts pressure on the gas cavity through the diaphragm. The increase in the gas cavity pressure can resist the deformation of the diaphragm. During the process, the system pressure is in a rising state. When the absorbed heat continues to increase, as the diaphragm continues to deform and the gas cavity continues to decrease, the gas resists with a higher pressure, and the system pressure continues to rise, finally damaging the expansion tank; there is even a risk of slight explosion. After the explosion, the hot coolant sprays around, endangering the surroundings.

[0007] The present invention designs an energy storage expansion tank to solve the above problems. Summary of the Invention

[0008] Based on this, it is necessary to provide an energy storage expansion tank for the problems existing in the current energy storage expansion tank. By adding a partition layer in the small shell body, two cavities are formed on the upper side of the diaphragm. A compressor is installed between the two cavities, so that the pressure in the cavity between the diaphragm and the partition layer will not change too much during use, the pressure pulsation amplitude is small, and the influence of large-amplitude pressure pulsation on the system is reduced; such a design can keep the pressure of the cooling system within a constant range, thereby protecting the system.

[0009] The above object is achieved by the following technical solutions:

[0010] An energy storage expansion tank, comprising:

[0011] A tank body, which is composed of a small shell body and a large shell body distributed up and down. A diaphragm is installed between the small shell body and the large shell body, and the diaphragm divides the small shell body and the large shell body into two cavities up and down; a PP inner lining is installed on the upper side of the large shell body; a partition layer is fixedly installed in the small shell body, and the cavity in the small shell body is divided into two parts up and down by the partition layer; a pneumatic component capable of adjusting the air pressure between the partition layer and the diaphragm is installed in the cavity on the upper side of the partition layer; a pressure sensor and an air inlet are respectively fixedly installed on both sides of the cavity between the partition layer and the diaphragm; a liquid inlet joint is installed on one side of the cavity between the diaphragm and the PP inner lining.

[0012] The liquid inlet joint includes a connecting pipe and a return water pipe installed on the connecting pipe. One end of the return water pipe penetrates into the cavity between the diaphragm and the PP inner lining, and the other end penetrates out of the outer wall of the connecting pipe.

[0013] In one embodiment, an upper sealing sleeve is fixedly installed on the outer edge of the diaphragm, and the upper sealing sleeve and the diaphragm are of the same material and integral structure; a sealing ring is installed between the upper sealing sleeve and the small shell body.

[0014] In one embodiment, a lower sealing sleeve is fixedly installed on the outer edge of the PP inner lining, and the lower sealing sleeve and the PP inner lining are of the same material and integral structure; a sealing block is installed between the lower sealing sleeve and the upper sealing sleeve.

[0015] In one embodiment, two circles of sealing blocks are arranged inside and outside the sealing block between the lower sealing sleeve and the upper sealing sleeve. Each circle of sealing blocks is circumferentially evenly arranged between the lower sealing sleeve and the upper sealing sleeve, and the inner and outer two circles of sealing blocks are circumferentially staggered; air outlets are opened on the wall surface of the small shell body near the edge and are circumferentially evenly distributed; a first cap is installed on the air outlet; the middle of the first cap is of an elastic membrane structure.

[0016] In one embodiment, a connection portion between the small housing and the large housing forms an annular cavity by the small housing, the large housing, an upper sealing sleeve and a lower sealing sleeve. An elastic bladder is mounted on each air outlet, and the elastic bladder is located within the annular cavity; an open end of the elastic bladder is in an inverted U shape and sleeved on the air outlet and fixed by a screwed-on first cap.

[0017] In one embodiment, a connection portion between the small housing and the large housing has a spiral connection section. The small housing and the large housing are connected in a spiral fitting manner and are welded by electric welding at the outermost side.

[0018] In one embodiment, the pneumatic assembly includes a motor and a compressor. The compressor is mounted on the upper side of the partition layer, and an air port of the compressor penetrates into a cavity between the partition layer and the diaphragm; the motor is mounted outside the small housing, and an output end of the motor is connected to the compressor.

[0019] In one embodiment, a first one-way valve and a second one-way valve are mounted on the partition layer.

[0020] A partition plate is horizontally and fixedly mounted on the upper side of the partition layer, and the partition plate divides a cavity on the upper side of the partition layer and the small housing into left and right parts.

[0021] The pneumatic assembly includes a motor and a compressor. The compressor is mounted on the upper side of the partition layer and on the left side of the partition plate, and an air port of the compressor penetrates through the partition plate and is located within a cavity on the right side of the partition plate; the motor is mounted outside the small housing, and an output end of the motor is connected to the compressor.

[0022] In one embodiment, the first one-way valve and the second one-way valve have exactly the same structure, except that their installation directions are opposite; for the first one-way valve, it includes a fixed disk, a spring, a mounting sleeve, a conical surface, and a piston. The mounting sleeve is fixedly mounted on the partition layer, an inner side of a lower end of the mounting sleeve has a conical surface, and a fixed disk is fixedly mounted on an upper end of the mounting sleeve; one end of the piston has a conical surface, the piston is slidably mounted within the mounting sleeve, and a spring is mounted between the piston and the fixed disk; the conical surface on the piston cooperates with the conical surface within the mounting sleeve.

[0023] In one embodiment, one end of the connecting pipe has a fixed ring with a U-shaped cross-section on one side. One end of the connecting pipe located outside the large housing has an external thread, and a nut is mounted on the external thread. The nut is in contact and cooperation with the large housing; a sealing gasket is mounted between the fixed ring and the PP inner lining; a second cap is mounted on an outer end of the return pipe.

[0024] Advantages of the present invention

[0025] 1. In the present invention, the function of the PP lining is to provide anti-corrosion. The coolant is generally composed of a mixture of ethylene glycol and water. Ethylene glycol has a certain corrosive effect on metal materials. The large housing is supported by metal materials. The PP lining can isolate the contact between ethylene glycol and the large housing, preventing ethylene glycol from corroding the large housing.

[0026] 2. In the present invention, a sensor is installed at one end of the compressor that penetrates into the right - hand cavity of the partition. In the initial state, the gas pressure in the cavity between the partition layer and the diaphragm is less than the gas pressure in the right - hand cavity of the partition and both are greater than the air pressure. The second one - way valve is in the open state. Set the right - hand cavity of the partition as cavity one, and the cavity between the partition layer and the diaphragm as cavity two. During actual use, when the pressure in cavity two increases and is greater than the pressure in cavity one, the gas in cavity two will enter cavity one through the first one - way valve, and the second one - way valve will be closed under the relationship of the gas pressures in the two cavities. However, the excess gas that enters cavity one will be quickly pumped away by the compressor. The air pressure intensity in cavity one is maintained, and the sensitivity of the pressure adjustment in cavity two is maintained. During use, the pressure in cavity two will not change too much, the pressure pulsation amplitude is small, and the impact of large - amplitude pressure pulsation on the system is reduced. Such a design can keep the pressure of the cooling system within a constant range, thereby protecting the system.

[0027] 3. When cleaning the cavity between the PP lining and the diaphragm in the present invention, a cleaning liquid circuit is formed through the return pipe. When cleaning the cavity between the PP lining and the diaphragm, the high - pressure cleaning liquid is connected to the connecting pipe. When the high - pressure cleaning liquid is sprayed into the cavity between the PP lining and the diaphragm from the connecting pipe for cleaning, the water sprayed in will flow out from the return pipe after flushing the cavity wall, forming a flowing water stream, which increases the cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall component appearance.

[0029] Figure 2 It is a schematic diagram of the internal structure of the first type of tank.

[0030] Figure 3 It is a schematic diagram of the structure of the first type of pneumatic component.

[0031] Figure 4 It is a schematic diagram of the distribution of the diaphragm and the PP lining.

[0032] Figure 5 It is a schematic diagram of the distribution of the sealing blocks.

[0033] Figure 6 It is a schematic diagram of the installation of the first one - way valve and the second one - way valve.

[0034] Figure 7 It is a schematic diagram of the structure of the first one - way valve.

[0035] Figure 8 It is a schematic diagram of the structure of the second one-way valve.

[0036] Figure 9 It is a schematic diagram of the distribution of the elastic bladder.

[0037] Figure 10 It is a schematic diagram of the working principle of the elastic bladder.

[0038] Figure 11 It is a schematic diagram of the structure of the first cap.

[0039] Figure 12 It is a schematic diagram of the internal structure of the second type of tank body.

[0040] Names of the reference numerals in the figure: 1. Tank body; 101. Small shell; 102. Interlayer; 103. Diaphragm; 104. First one-way valve; 1041. Fixed plate; 1042. Spring; 1043. Installation sleeve; 1044. Conical surface; 1045. Piston; 105. Second one-way valve; 106. PP inner lining; 107. Large shell; 108. Upper sealing sleeve; 109. Lower sealing sleeve; 110. Sealing ring; 111. Sealing block; 112. Elastic bladder; 113. Spiral connecting section; 114. First cap; 115. Elastic membrane; 116. Air outlet; 117. Partition; 2. Pneumatic component; 201. Motor; 202. Compressor; 3. Pressure sensor; 4. Air inlet; 5. Liquid inlet joint; 501. Connecting pipe; 502. Second cap; 503. Return water pipe; 504. Fixed ring; 505. Sealing gasket; 506. Nut. Detailed implementation manners

[0041] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0042] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequential or technical meanings. The terms "connection" and "coupling" used in this application, unless otherwise specified, both include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. are based on the orientation 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 should not be construed as a limitation to the present invention.

[0043] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0044] As Figure 1 - As Figure 12 shown, an energy storage expansion tank includes a tank body 1, as Figure 1 、 2 、3、12 shown, the tank body 1 is composed of two parts, a small shell 101 and a large shell 107 which are distributed up and down. A diaphragm 103 is installed between the small shell 101 and the large shell 107, and the diaphragm 103 divides the small shell 101 and the large shell 107 into two upper and lower cavities; a PP lining 106 is installed on the upper side of the large shell 107; a partition layer 102 is fixedly installed in the small shell 101, and the partition layer 102 divides the cavity in the small shell 101 into two upper and lower parts; a pneumatic component 2 capable of adjusting the air pressure between the partition layer 102 and the diaphragm 103 is installed in the cavity above the partition layer 102; a pressure sensor 3 and an air inlet 4 are respectively fixedly installed on both sides of the cavity between the partition layer 102 and the diaphragm 103; as Figure 4 、 9 shown, a liquid inlet joint 5 is installed on one side of the cavity between the diaphragm 103 and the PP lining 106; the liquid inlet joint 5 includes a connecting pipe 501 and a return water pipe 503 installed on the connecting pipe 501. One end of the return water pipe 503 penetrates into the cavity between the diaphragm 103 and the PP lining 106, and the other end penetrates out of the outer wall of the connecting pipe 501.

[0045] In the present invention, the function of the PP lining 106 is to play an anti-corrosion role. The coolant is generally composed of a mixture of ethylene glycol and water. Ethylene glycol has a certain corrosive effect on metal materials. The large shell 107 is supported by metal materials. Through the PP lining 106, the contact between ethylene glycol and the large shell 107 can be isolated to prevent ethylene glycol from corroding the large shell 107.

[0046] In the present invention, the function of the pressure sensor 3 is to detect whether the pressure in the expansion tank drops. When the gas pressure in the expansion tank decreases, the pressure sensor 3 transmits a signal. After the control unit receives the signal, it controls the air inlet 4 to open for air replenishment.

[0047] When the coolant with external pressure enters the expansion tank, the pressure of the coolant in the expansion tank increases, the diaphragm 103 is squeezed and deformed, and the gas in the cavity between the diaphragm 103 and the partition layer 102 is compressed. After the gas is compressed, its volume becomes smaller and the pressure rises. At this time, the pneumatic component 2 works to pump the gas in the cavity between the diaphragm 103 and the partition layer 102 into the cavity above the partition layer 102 to ensure that the pressure in the cavity between the diaphragm 103 and the partition layer 102 does not change too much; the pressure pulsation amplitude is small, reducing the impact of large-amplitude pressure pulsation on the system. During use, when the gas pressure in the cavity between the diaphragm 103 and the partition layer 102 is consistent with the coolant pressure below the diaphragm 103, the coolant stops flowing; when the coolant below the diaphragm 103 cools down and the pressure decreases, and the gas pressure in the cavity between the diaphragm 103 and the partition layer 102 is greater than the coolant pressure, at this time, the gas in the cavity between the diaphragm 103 and the partition layer 102 will squeeze the diaphragm 103 to make the diaphragm 103 deformed, and the deformed diaphragm 103 squeezes the coolant below to supplement the system.

[0048] In a further embodiment, as Figure 4 、 9 、10 shown, an upper sealing sleeve 108 is fixedly installed on the outer edge of the diaphragm 103, and the upper sealing sleeve 108 and the diaphragm 103 are of the same material and integral structure; a sealing ring 110 is installed between the upper sealing sleeve 108 and the small housing 101. The function of the sealing ring 110 is to seal the upper sealing sleeve 108 and the diaphragm 103.

[0049] In a further embodiment, as Figure 4 、 5 、9、10 shown, a lower sealing sleeve 109 is fixedly installed on the outer edge of the PP lining 106, and the lower sealing sleeve 109 and the PP lining 106 are of the same material and integral structure; a sealing block 111 is installed between the lower sealing sleeve 109 and the upper sealing sleeve 108.

[0050] In a further embodiment, as Figure 5 shown, there are two circles of sealing blocks 111 arranged inside and outside between the lower sealing sleeve 109 and the upper sealing sleeve 108. Each circle of sealing blocks 111 is circumferentially evenly arranged between the lower sealing sleeve 109 and the upper sealing sleeve 108, and the inner and outer two circles of sealing blocks 111 are circumferentially staggered; an air outlet 116 evenly distributed in the circumferential direction is opened on the wall surface of the small housing 101 near the edge; a first cap 114 is installed on the air outlet 116; as Figure 11 shown, the middle of the first cap 114 is of an elastic membrane 115 structure.

[0051] In a further embodiment, as Figure 9As shown, at the connection between the small housing 101 and the large housing 107, a ring-shaped cavity is formed by the small housing 101, the large housing 107, the upper sealing sleeve 108, and the lower sealing sleeve 109. An elastic bladder 112 is installed on each air outlet 116, and the elastic bladder 112 is located in the ring-shaped cavity. The open end of the elastic bladder 112 is in an inverted U shape and is sleeved on the air outlet 116 and fixed by the screwed-on first cap 114.

[0052] If air or liquid leakage occurs between the lower sealing sleeve 109 and the upper sealing sleeve 108, or between the upper sealing sleeve 108 and the small housing 101, the leaked gas will enter the ring-shaped cavity formed by the small housing 101, the large housing 107, the upper sealing sleeve 108, and the lower sealing sleeve 109. The gas entering the ring-shaped cavity will squeeze the elastic bladder 112, causing the elastic bladder 112 to compress. The compression of the elastic bladder 112 will squeeze the gas inside the elastic bladder 112, causing the gas inside the elastic bladder 112 to flow towards the air outlet 116. The gas flowing towards the air outlet 116 will squeeze the elastic membrane 115 on the first cap 114, causing the elastic membrane 115 on the first cap 114 to bulge. The staff can judge whether there is air or liquid leakage between the lower sealing sleeve 109 and the upper sealing sleeve 108, or between the upper sealing sleeve 108 and the small housing 101 according to whether the elastic membrane 115 bulges. During actual use, if the air leakage amount is relatively large and the staff does not timely notice the bulging of the elastic membrane 115, then the elastic membrane 115 may be squeezed and broken, as Figure 10 shown. At this time, the gas entering the ring-shaped cavity will squeeze the elastic bladder 112, causing the elastic bladder 112 to protrude and bulge from the air outlet 116, increasing the probability of being discovered by the staff.

[0053] During the actual use of the present invention, it is necessary to ensure a high sealing performance in the cavity between the diaphragm 103 and the interlayer 102. The diaphragm 103 and the PP inner lining 106 can withstand the sealing performance under small pressures, and at the same time, it is also necessary to ensure that liquid can leak when the pressure is large to reduce the pressure and prevent explosion; as Figure 5 shown in a and c of Figure 5 a of Figure 5As shown in b in [reference], after the upper sealing sleeve 108 and the lower sealing sleeve 109 are in extrusion contact and fit with each other, the two circles of sealing blocks 111 will be deformed by the extrusion of the upper sealing sleeve 108 and the lower sealing sleeve 109. The deformation of the sealing blocks 111 will extrude the upper sealing sleeve 108 and the lower sealing sleeve 109, causing the upper sealing sleeve 108 and the lower sealing sleeve 109 to also deform accordingly. In this way, the pressure in the area between the upper sealing sleeve 108 and the lower sealing sleeve 109 without the sealing blocks 111 will increase, ensuring the sealing performance between the areas of the upper sealing sleeve 108 and the lower sealing sleeve 109 without the sealing blocks 111; and the area with the sealing blocks 11 will also have good sealing performance due to the presence of the sealing blocks 111, that is, the design of the sealing blocks can ensure the sealing performance between the entire circle of the upper sealing sleeve 108 and the lower sealing sleeve 109.

[0054] Because the upper sealing sleeve 108, the lower sealing sleeve 109, and the sealing blocks 111 are all elastic, the sealing ability between the lower sealing sleeve 109 and the upper sealing sleeve 108 has a certain range. During normal operation, the tightly pressed lower sealing sleeve 109, the upper sealing sleeve 108, and the sealing blocks 111 can seal the diaphragm 103 and the PP lining 106; however, when the expansion tank is impacted, the liquid on the lower side of the diaphragm abnormally heats up and the pressure increases. The area between the upper sealing sleeve 108 and the lower sealing sleeve 109 without the sealing blocks 111 will be preferentially squeezed open compared to the area with the sealing blocks 111, forming an S-shaped channel between the circumferentially misaligned sealing blocks 111; because the area between the upper sealing sleeve 108 and the lower sealing sleeve 109 without the sealing blocks 111 is squeezed and deformed in this state, the deformation pressure will be transmitted between the sealing blocks 111 and the upper sealing sleeve 108 and the lower sealing sleeve 109, which will enhance the sealing effect at the sealing blocks 111 and make it more difficult to be opened; that is, under high pressure, an S-shaped channel will be formed at the area between the upper sealing sleeve 108 and the lower sealing sleeve 109 without the sealing blocks 111; the liquid on the lower side of the diaphragm will flow out through this channel and flow into an annular cavity formed by the small housing 101, the large housing 107, the upper sealing sleeve 108, and the lower sealing sleeve 109; through the leakage of liquid, it is possible to protect the pressure vessel from exploding due to abnormal pressure increase. That is, in the present invention, through the design of the sealing blocks 111, the lower sealing sleeve 109, and the upper sealing sleeve 108, it can be ensured that the sealing performance between the diaphragm 103 and the PP lining 106 can withstand the normal state, ensuring that the PP lining 106 and the diaphragm 103 do not separate; at the same time, it can ensure that there is no liquid leakage during the normal operation of the cooling system. When the expansion tank is impacted, the liquid on the lower side of the diaphragm abnormally heats up and the pressure increases, and through the leakage of liquid, it is possible to protect the pressure vessel from exploding due to abnormal pressure increase.

[0055] In a further embodiment, such as Figure 9As shown, at the connection between the small housing 101 and the large housing 107, there is a spiral connection section 113. The small housing 101 and the large housing 107 are connected by spiral fitting, and the outermost side is welded by electric welding. The connection process through the spiral connection section 113 ensures good sealing at the connection between the large housing 107 and the small housing 101.

[0056] In a further embodiment, as Figure 12 shown, the pneumatic assembly 2 includes a motor 201 and a compressor 202. The compressor 202 is installed on the upper side of the partition layer 102, and the air inlet of the compressor 202 penetrates into the cavity between the partition layer 102 and the diaphragm 103; the motor 201 is installed outside the small housing 101, and the output end of the motor 201 is connected to the compressor 202.

[0057] When the coolant with external pressure enters the expansion tank, the pressure of the coolant in the expansion tank increases, the diaphragm 103 is squeezed and deformed, and the gas in the cavity between the diaphragm 103 and the partition layer 102 is compressed. After the gas is compressed, its volume becomes smaller and the pressure rises. At this time, the motor 201 works, and the compressor 202 pumps the gas in the cavity between the diaphragm 103 and the partition layer 102 into the cavity on the upper side of the partition layer 102 to ensure that the pressure in the cavity between the diaphragm 103 and the partition layer 102 does not change too much; the pressure pulsation amplitude is small, reducing the influence of large - amplitude pressure pulsation on the system. When the coolant cools down and the pressure decreases on the lower side of the diaphragm 103, and the gas pressure in the cavity between the diaphragm 103 and the partition layer 102 is greater than the coolant pressure, at this time, the gas in the cavity between the diaphragm 103 and the partition layer 102 will squeeze the diaphragm 103 to make the diaphragm 103 deformed, and the deformed diaphragm 103 squeezes the coolant on the lower side to supplement the system; during this process, the motor 201 is controlled to work in the reverse direction, so that the compressor 202 transports the gas on the upper side of the partition layer 102 back to the cavity between the diaphragm 103 and the partition layer 102 for air replenishment; further squeezing the diaphragm 103.

[0058] In a further embodiment, as Figure 6 shown, a first one - way valve 104 and a second one - way valve 105 are installed on the partition layer 102.

[0059] As Figure 3 shown, a partition board 117 is horizontally and fixedly installed on the upper side of the partition layer 102. The partition board 117 divides the cavity on the upper side of the partition layer 102 and the small housing 101 into left and right parts.

[0060] As Figure 3 shown, the pneumatic assembly 2 includes a motor 201 and a compressor 202. The compressor 202 is installed on the upper side of the partition layer 102 and on the left side of the partition board 117, and the air inlet of the compressor 202 passes through the partition board 117 and is located in the cavity on the right side of the partition board 117; the motor 201 is installed outside the small housing 101, and the output end of the motor 201 is connected to the compressor 202.

[0061] In a further embodiment, as Figure 7 , 8 shown, the first check valve 104 and the second check valve 105 have exactly the same structure, except that their installation directions are opposite; for the first check valve 104, it includes a fixed disk 1041, a spring 1042, a mounting sleeve 1043, a conical surface 1044, and a piston 1045. Among them, the mounting sleeve 1043 is fixedly installed on the partition layer 102. The inner side of the lower end of the mounting sleeve 1043 has a conical surface 1044, and the upper end of the mounting sleeve 1043 is fixedly installed with a fixed disk 1041; one end of the piston 1045 has a conical surface 1044. The piston 1045 is slidably installed in the mounting sleeve 1043, and a spring 1042 is installed between the piston 1045 and the fixed disk 1041; the conical surface 1044 on the piston 1045 cooperates with the conical surface 1044 in the mounting sleeve 1043.

[0062] In the present invention, the strength of the spring 1042 in the first check valve 104 is greater than the strength of the spring 1042 in the second check valve 105; in the present invention, a sensor is installed at one end of the compressor 202 that penetrates into the right - hand cavity of the partition plate 117; in the initial state, the gas pressure in the cavity between the partition layer 102 and the diaphragm 103 is less than the gas pressure in the right - hand cavity of the partition plate 117 and is greater than the air pressure; the second check valve 105 is in an open state; it is assumed that the right - hand cavity of the partition plate 117 is cavity one, and the cavity between the partition layer 102 and the diaphragm 103 is cavity two. During actual use, when the pressure in cavity two increases and is greater than the pressure in cavity one, the gas in cavity two will enter cavity one through the first check valve 104, and the second check valve 105 is closed under the relationship of the gas pressures in the two cavities; however, the excess gas that enters cavity one will be quickly pumped away by the compressor 202; maintaining the air pressure intensity in cavity one and the sensitivity of the pressure adjustment in cavity two. During use, the pressure in cavity two will not change too much, the pressure pulsation amplitude is small, and the impact of large - amplitude pressure pulsation on the system is reduced; when the coolant cools down and the pressure decreases on the lower side of the diaphragm 103, and the gas pressure in the cavity between the diaphragm 103 and the partition layer 102 is greater than the coolant pressure, at this time, the gas in cavity two will squeeze the diaphragm 103 to make the diaphragm 103 deform, and the deformed diaphragm 103 squeezes the coolant replenishment system on the lower side; the volume of cavity two becomes larger, the pressure in cavity two becomes smaller, the first check valve 104 is in a closed state, and at this time, the gas in cavity one will flow through the second check valve 105 into cavity two for air replenishment, further squeezing the diaphragm 103.

[0063] Without the first cavity, the adjustment solely relies on the compressor 202 and the pressure sensor 3. As a result, the compressor 202 starts too frequently, reducing its service life. After adding the first cavity, a buffer can be added, which to a certain extent reduces the startup frequency of the compressor 202. Compared with only having the second cavity, the present invention adds a first cavity, increasing the buffer area and making the adjustment more resistant to risks. Such a design can keep the pressure of the cooling system within a constant range, thereby protecting the system.

[0064] In a further embodiment, as Figure 9 shown, one end of the connecting pipe 501 has a fixing ring 504 with a U-shaped cross-section on one side. The end of the connecting pipe 501 located outside the large housing 107 has an external thread, and a nut 506 is installed on the external thread. The nut 506 is in contact and cooperation with the large housing 107. A gasket 505 is installed between the fixing ring 504 and the PP inner lining 106. A second cap 502 is installed at the outer end of the return water pipe 503.

[0065] The function of setting the return water pipe 503 is to form a cleaning liquid loop through the return water pipe 503 when cleaning the cavity between the PP inner lining 106 and the diaphragm 103. When cleaning the cavity between the PP inner lining 106 and the diaphragm 103, the high-pressure cleaning liquid is connected to the connecting pipe 501. During the process of the high-pressure cleaning liquid spraying into the cavity between the PP inner lining 106 and the diaphragm 103 for cleaning, the sprayed water will flow out from the return water pipe 503 after flushing the cavity wall, forming a flowing water flow and increasing the cleaning effect.

[0066] Rotating the nut 506 can pull the connecting pipe 501, causing the end of the connecting pipe 501 with the fixing ring 504 to press tightly against the PP inner lining 106, and the gasket 505 is pressed tightly.

[0067] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0068] The above-described embodiments only represent several implementation manners of the present invention. Their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A energy storage expansion tank, characterized in that, Comprising: A tank body, which is composed of a small shell and a large shell distributed up and down. A diaphragm is installed between the small shell and the large shell, and the diaphragm divides the small shell and the large shell into two upper and lower cavities; a PP lining is installed on the upper side of the large shell; a partition layer is fixedly installed in the small shell, and the partition layer divides the cavity in the small shell into two upper and lower parts; a pneumatic component capable of adjusting the air pressure between the partition layer and the diaphragm is installed in the cavity above the partition layer; pressure sensors and air inlets are respectively fixedly installed on both sides of the cavity between the partition layer and the diaphragm; a liquid inlet joint is installed on one side of the cavity between the diaphragm and the PP lining; The liquid inlet joint includes a connecting pipe and a water return pipe installed on the connecting pipe. One end of the water return pipe penetrates into the cavity between the diaphragm and the PP lining, and the other end penetrates out of the outer wall of the connecting pipe; An upper sealing sleeve is fixedly installed on the outer edge of the diaphragm, and a sealing ring is installed between the upper sealing sleeve and the small shell; A lower sealing sleeve is fixedly installed on the outer edge of the PP lining, and a sealing block is installed between the lower sealing sleeve and the upper sealing sleeve; Air outlets evenly distributed in the circumferential direction are opened on the wall surface of the small shell near the edge; a first cap is installed on the air outlet; the middle of the first cap is of an elastic membrane structure; A circular cavity is formed at the connection between the small shell and the large shell by the small shell, the large shell, the upper sealing sleeve and the lower sealing sleeve. An elastic bladder is installed on each air outlet, and the elastic bladder is located in the circular cavity; the open end of the elastic bladder is in an inverted U shape and is sleeved on the air outlet and fixed by the screwed first cap.

2. The energy storage expansion tank according to claim 1, wherein: The upper sealing sleeve and the diaphragm are of the same material and integral structure.

3. The energy storage expansion tank according to claim 2, characterized in that: The lower sealing sleeve and the PP lining are of the same material and integral structure.

4. The energy storage expansion tank according to claim 3, wherein: There are two circles of sealing blocks arranged inside and outside between the lower sealing sleeve and the upper sealing sleeve. Each circle of sealing blocks is evenly arranged in the circumferential direction between the lower sealing sleeve and the upper sealing sleeve, and the inner and outer two circles of sealing blocks are circumferentially staggered.

5. A energy storage expansion tank according to claim 1, wherein: The connection between the small shell and the large shell has a spiral connection section. The spiral connection sections of the small shell and the large shell are fitted and connected, and the outermost side is welded by electric welding.

6. The energy storage expansion tank according to claim 1, wherein: The pneumatic component includes a motor and a compressor. The compressor is installed on the upper side of the partition layer, and the air port of the compressor penetrates into the cavity between the partition layer and the diaphragm; the motor is installed outside the small shell, and the output end of the motor is connected to the compressor.

7. A energy storage expansion tank according to claim 1, characterized in that: A first one-way valve and a second one-way valve are installed on the partition layer; A partition board is horizontally and fixedly installed on the upper side of the partition layer, and the partition board divides the cavity above the partition layer and the small shell into left and right parts; The pneumatic component includes a motor and a compressor. The compressor is installed on the upper side of the partition layer and on the left side of the partition board, and the air port of the compressor passes through the partition board and is located in the cavity on the right side of the partition board; the motor is installed outside the small shell, and the output end of the motor is connected to the compressor; The first one-way valve and the second one-way valve have exactly the same structure, except that their installation directions are opposite.

8. A energy storage expansion tank according to claim 7, characterized in that: The first one-way valve includes a fixed disk, a spring, a mounting sleeve, a conical surface, and a piston. The mounting sleeve is fixedly installed on the partition layer. The inner side of the lower end of the mounting sleeve has a conical surface, and a fixed disk is fixedly installed at the upper end of the mounting sleeve; one end of the piston has a conical surface, the piston is slidably installed in the mounting sleeve, and a spring is installed between the piston and the fixed disk; the conical surface on the piston cooperates with the conical surface in the mounting sleeve.

9. The energy storage expansion tank according to claim 1, wherein: One end of the connecting pipe has a fixing ring with a U-shaped cross-section on one side, and the end of the connecting pipe located outside the large shell has an external thread, on which a nut is installed, and the nut is in contact with the large shell; a sealing gasket is installed between the fixing ring and the PP liner; and a second cap is installed at the outer end of the return pipe.

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