Stacked receiver drier for automotive air conditioning

Abstract

The present invention relates to the technical field of automotive air conditioning, and in particular to a stacked receiver drier for automotive air conditioning, comprising: a main tank, wherein the main tank is formed by sequentially stacking and combining a first tank, a second tank, and a third tank from top to bottom; and a refrigerant storage compartment, which is provided inside the first tank, wherein communication sleeves pass through the bottom surface of the first tank, and a first delivery pipe is vertically arranged at the center of the refrigerant storage compartment. The main tank of the present invention is formed by sequentially stacking and combining a first tank, a second tank, and a third tank from top to bottom, the tanks are detachably connected, and pipe delivery structures between the tanks are connected by means of pluggable quick-connect / quick-disconnect structures; when a desiccant needs to be replaced or a filter screen needs to be cleaned, only the second tank and the third tank need to be detached, without the need for replacing the entire receiver drier; during maintenance, the refrigerant is still stored inside the first tank, without the need for releasing, recovering, and re-pressurizing and re-delivering the refrigerant, thereby improving maintenance efficiency.

Description

A stacked liquid receiver for automotive air conditioning Technical Field

[0001] This invention relates to the field of automotive air conditioning technology, and more particularly to a stacked liquid receiver for automotive air conditioning. Background Technology

[0002] With the development of the modern automotive industry, vehicle comfort and convenience have become one of the key concerns for consumers. Among them, the performance and reliability of the automotive air conditioning system are particularly critical. As an indispensable part of the automotive air conditioning system, the air conditioning receiver-dryer can hold a certain amount of refrigerant to ensure that the air conditioning system has enough refrigerant to complete the refrigeration cycle. It also contains a desiccant that can absorb moisture and other impurities in the refrigerant, preventing these substances from damaging the air conditioning system, such as causing ice blockage or corroding metal parts. It also filters out particulate matter that may be present in the refrigerant, thereby ensuring the normal operation of the air conditioning system.

[0003] However, current automotive air conditioning receivers generally adopt a one-piece structural design. While this structure simplifies the manufacturing process and enhances structural stability, during use, the desiccant inside the receiver gradually absorbs moisture and other impurities from the refrigerant until it becomes saturated. When the desiccant reaches its moisture absorption limit and loses its ability to absorb further moisture, and when the internal filter structure becomes clogged, the entire receiver must be replaced and disassembled. This not only increases maintenance costs, but also requires technicians to use specialized tools to perform operations such as refrigerant recovery during replacement. Refilling the refrigerant after installation and replacement also takes a long time, resulting in time-consuming, labor-intensive, and inefficient overall maintenance. Summary of the Invention

[0004] In view of this, the purpose of this invention is to provide a stacked liquid receiver for automotive air conditioning, so as to solve the problem that current automotive air conditioning liquid receivers require the replacement and disassembly of the entire liquid receiver when maintaining and replacing the internal desiccant and filter structure, and the replacement requires the recovery of refrigerant, resulting in time-consuming, labor-intensive and inefficient overall maintenance.

[0005] To achieve the above objectives, the present invention provides a stacked liquid reservoir for automotive air conditioning, comprising a main tank, wherein the main tank is composed of a first tank, a second tank, and a third tank stacked together from top to bottom, and further comprising:

[0006] A refrigerant storage chamber is located inside the first tank body. A connecting sleeve is provided through the middle of the bottom surface of the first tank body. A first conveying pipe is vertically provided at the center of the refrigerant storage chamber.

[0007] A desiccant storage compartment is located inside the second tank. The top of the second tank is detachably connected to the bottom of the first tank. A connecting conveying pipe is provided through the middle of the top surface of the second tank. The connecting conveying pipe and the connecting sleeve are arranged correspondingly to each other. A second conveying pipe is vertically arranged at the center of the desiccant storage compartment.

[0008] A closed filter chamber is disposed inside the third tank. The top of the third tank is detachably connected to the bottom of the second tank. A unit filter screen is disposed inside the closed filter chamber.

[0009] A connecting interface is provided in the middle of the connecting sleeve and at the bottom of the first conveying pipe. A one-way conveying valve is installed in the middle of the connecting interface. A connecting connector is provided in the middle of the connecting conveying pipe and at the top of the second conveying pipe. When the connecting interface and the connecting connector are inserted and connected, the one-way conveying valve is opened. When the connecting interface and the connecting connector are separated, the one-way conveying valve is closed.

[0010] Furthermore, the bottom end of the first conveying pipe is located at the center of the bottom surface of the first tank body. The top end of the first tank body is connected to an input connecting pipe and an output connecting pipe. The output connecting pipe is connected to the first conveying pipe. The top end of the second conveying pipe is located at the top surface of the second tank body. An input sleeve is provided at the center of the top of the main tank body. A central output pipe is nested and spaced inside the input sleeve. The top end of the input sleeve is connected to the input connecting pipe. The bottom opening of the input sleeve is located at the top of the refrigerant storage compartment. The output connecting pipe is connected to the first conveying pipe through the central output pipe. The first conveying pipe is connected to the second conveying pipe through a connecting interface and a connecting connector. The refrigerant is conveyed to the refrigerant storage compartment through the input connecting pipe and the input sleeve, and then conveyed downwards through the connecting sleeve and the connecting conveying pipe to the desiccant storage compartment. Then it is conveyed downwards to the closed filter compartment. After being filtered by the unit filter screen, it is conveyed sequentially through the second conveying pipe, the first conveying pipe, and the central output pipe to the output connecting pipe.

[0011] Furthermore, the one-way delivery valve has a conical channel inside, and a sealing valve core is slidably fitted in the middle of the conical channel. A sealing spring is provided above the sealing valve core. A central push rod is connected to the center of the connecting joint. The central push rod and the sealing valve core cooperate with each other. When the connecting interface and the connecting joint are inserted and connected, the central push rod pushes the sealing valve core upward to open the conical channel. When the connecting interface and the connecting joint are separated, the sealing spring pushes the sealing valve core downward to close the conical channel.

[0012] Furthermore, a bypass circulation opening is provided through the middle of the side wall of the first conveying pipe, and a central sealing sleeve is nested and slidably provided inside the first conveying pipe. The central sealing sleeve and the bypass circulation opening are configured to cooperate with each other, and the bypass circulation opening is kept closed by the central sealing sleeve. A traction linkage rod is connected to the bottom end of the central sealing sleeve, and the central sealing sleeve is connected to a sealing valve core provided at the bottom end of the first conveying pipe through the traction linkage rod. When the sealing valve core moves upward to open the conical channel, the central sealing sleeve moves upward synchronously through the traction linkage rod to close the bypass circulation opening. When the sealing valve core moves downward to open the conical channel, the central sealing sleeve moves downward synchronously through the traction linkage rod to open the bypass circulation opening.

[0013] Furthermore, a fixed connecting block and a sliding connecting block are respectively connected to the bottom end of the first tank and the top end of the second tank. The fixed connecting block and the sliding connecting block are vertically slidably connected to each other. A connecting locking groove is provided in the middle of the fixed connecting block, and a locking sleeve is horizontally provided in the middle of the sliding connecting block. A connecting locking pin is nested and slidably provided inside the locking sleeve. The connecting locking pin and the connecting locking groove are mutually configured. An unlocking lever is connected to the rear end of the connecting locking pin.

[0014] Furthermore, an electric heating wire is arranged around the top of the desiccant storage compartment, a limit switch is installed on the top surface of the second tank, and a limit sleeve is vertically installed on the bottom surface of the first tank. A limit rod is slidably nested inside the limit sleeve, and a rod spring is provided in the middle of the limit rod. The limit rod and the limit switch are configured to cooperate with each other. When the first tank and the second tank are connected, the limit rod presses the limit switch to keep the electric heating wire closed. When the first tank and the second tank are separated, the limit rod no longer presses the limit switch to synchronously turn on the electric heating wire.

[0015] Furthermore, the length of the central top rod inside the connecting joint located in the middle of the connecting conveying pipe is less than the length of the central top rod inside the connecting joint located at the top of the second conveying pipe. When the first tank and the second tank are separated from each other, the one-way conveying valve inside the connecting interface in the middle of the connecting sleeve closes before the one-way conveying valve inside the connecting interface at the bottom of the first conveying pipe. The fixed connecting block is provided with a connecting locking groove and a half-open locking groove in the middle. The sliding connecting block is provided with two locking sleeves in parallel in the middle. The connecting locking pins inside the two locking sleeves are respectively matched with the connecting locking groove and the half-open locking groove. The bottom height of the half-open locking groove is lower than the bottom height of the connecting locking groove.

[0016] Furthermore, the top of the third tank and the bottom of the second tank are detachably and separably connected by a threaded screw. Multiple unit filters are stacked inside the sealed filter chamber. Each unit filter includes a fixing ring, which is nested and slidably and detachably connected to the sealed filter chamber. A unit conveying pipe is connected to the center of the fixing ring. Both the upper and lower ends of the unit conveying pipe are provided with series interfaces. Adjacent unit conveying pipes are connected to each other through series interfaces. The unit conveying pipe is connected to the bottom of the second conveying pipe through a series interface. A lateral opening is provided through the middle of the side wall of the unit conveying pipe.

[0017] Furthermore, an annular filter frame is nested and slidably arranged inside the fixed mounting ring, an edge sealing ring is arranged around the edge of the annular filter frame, a central filter screen is arranged in the middle of the annular filter frame, a closed sleeve is arranged in the center of the annular filter frame, the closed sleeve is nested and slidably arranged outside the unit conveying pipe, an easy-bend support frame is connected to the bottom end of the closed sleeve, a preset easy-bend is arranged in the middle of the easy-bend support frame, the bottom end of the closed sleeve is connected to the bottom end of the unit conveying pipe through the easy-bend support frame, and multiple edge connecting grooves are arranged around the lower half of the fixed mounting ring.

[0018] Furthermore, an annular heating tube is arranged around the bottom of the desiccant storage compartment, and multiple heating fins are evenly connected around the middle of the annular heating tube. A heating output tube is connected to the top of the side wall of the second tank, and an electromagnetic switch valve is installed in the middle of the heating output tube. An unlocking coil is arranged around the middle of the locking sleeve. A humidity sensor is installed inside the desiccant storage compartment. A reset electromagnet is arranged around the bottom of the first tank and the top of the second tank.

[0019] The beneficial effects of this invention are as follows: As can be seen from the above description, the stacked liquid receiver for automotive air conditioning provided by this invention consists of a first tank, a second tank, and a third tank stacked from top to bottom. Each tank can be detachably connected, and the pipeline conveying structure between the tanks adopts a plug-in quick-connect and quick-disconnect structure, which allows the second and third tanks, namely the desiccant storage chamber and the sealed filter chamber, to be quickly disassembled and installed. When it is necessary to replace the desiccant or clean the filter, only the second and third tanks need to be disassembled to complete the work, without replacing the entire liquid receiver. During maintenance, the refrigerant is still stored inside the first tank, without the need to release, recover, and repressurize the refrigerant, which not only saves material costs but also improves maintenance efficiency. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 is a structural schematic diagram of the main tank body in a disassembled state according to an embodiment of the present invention;

[0022] Figure 2 is a structural schematic diagram of the main tank body according to an embodiment of the present invention;

[0023] Figure 3 is a schematic diagram of the bottom structure of the main tank body according to an embodiment of the present invention;

[0024] Figure 4 is a structural schematic diagram of the first tank body according to an embodiment of the present invention;

[0025] Figure 5 is a schematic diagram of the internal structure of the first tank in an embodiment of the present invention;

[0026] Figure 6 is a schematic diagram of the structure of the first conveying pipe according to an embodiment of the present invention;

[0027] Figure 7 is a schematic diagram of the bottom structure of the second tank body according to an embodiment of the present invention;

[0028] Figure 8 is a schematic diagram of the top structure of the second tank body according to an embodiment of the present invention;

[0029] Figure 9 is a partial structural schematic diagram of the connection between the first tank and the second tank according to an embodiment of the present invention;

[0030] Figure 10 is a schematic diagram of the structure of the sliding connection block according to an embodiment of the present invention;

[0031] Figure 11 is a schematic diagram of the internal structure of the second tank according to an embodiment of the present invention;

[0032] Figure 12 is a schematic diagram of the structure of the third tank in an embodiment of the present invention;

[0033] Figure 13 is a schematic diagram of the structure of the unit filter screen according to an embodiment of the present invention;

[0034] Figure 14 is a schematic diagram of the structure of the central filter screen in a completely blocked state according to an embodiment of the present invention.

[0035] The diagram is marked as follows:

[0036] 1. Main tank body; 101. Refrigerant charging valve; 102. Inlet sleeve; 103. Central outlet pipe; 104. Transparent observation window; 105. Inlet connecting pipe; 106. Inlet interface; 107. Outlet connecting pipe; 108. Outlet interface; 2. First tank body; 201. Refrigerant storage compartment; 202. Enclosed bottom plate; 203. Connecting sleeve; 204. Separation spring; 205. Limiting sleeve; 206. Limiting rod; 207. Rod Spring; 3. First conveying pipe; 301. Bypass circulation opening; 302. Central sealing sleeve; 303. Traction linkage rod; 4. Second tank; 401. Desiccant storage compartment; 402. Filling opening; 403. Sealed top plate; 404. Filter bottom plate; 405. Connecting conveying pipe; 406. Second conveying pipe; 407. Electric heating wire; 408. Limit switch; 5. Connecting interface; 501. One-way conveying valve; 502. Conical channel; 50 3. Sealing valve core; 504. Sealing spring; 505. Connecting joint; 506. Center push rod; 6. Fixed connecting block; 601. Sliding connecting block; 602. Connecting locking groove; 603. Half-open locking groove; 604. Reset electromagnet; 605. Locking sleeve; 606. Reset spring; 607. Unlocking coil; 608. Connecting locking pin; 609. Unlocking lever; 7. Third tank; 701. Sealed filter chamber; 702. Unit filter 703. Fixed mounting ring; 704. Edge connecting groove; 705. Unit delivery pipe; 706. Lateral opening; 707. Series interface; 8. Annular filter frame; 801. Central filter screen; 802. Sealed sleeve; 803. Flexible support frame; 804. Pre-set flexible bend; 805. Edge sealing ring; 9. Annular electric heating tube; 901. Heating fins; 902. Heating output tube; 903. Electromagnetic switch valve; 904. Humidity sensor. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments.

[0038] It should be noted that, unless otherwise defined, the technical or scientific terms used in this invention should have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0039] As shown in Figures 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, and 12, a stacked liquid receiver for automotive air conditioning includes a main tank 1, which is composed of a first tank 2, a second tank 4, and a third tank 7 stacked from top to bottom. It also includes:

[0040] A refrigerant storage chamber 201 is located inside the first tank 2. A connecting sleeve 203 is provided through the middle of the bottom surface of the first tank 2. A first conveying pipe 3 is vertically provided at the center of the refrigerant storage chamber 201.

[0041] The desiccant storage chamber 401 is located inside the second tank 4. The top of the second tank 4 is detachably connected to the bottom of the first tank 2. A connecting conveying pipe 405 is provided through the middle of the top surface of the second tank 4. The connecting conveying pipe 405 and the connecting sleeve 203 are provided correspondingly to each other. A second conveying pipe 406 is vertically provided at the center of the desiccant storage chamber 401.

[0042] A closed filter chamber 701 is located inside the third tank 7. The top of the third tank 7 is detachably connected to the bottom of the second tank 4. A unit filter screen 702 is installed inside the closed filter chamber 701.

[0043] The connecting interface 5 is located in the middle of the connecting sleeve 203 and at the bottom of the first conveying pipe 3. A one-way conveying valve 501 is installed in the middle of the connecting interface 5. A connecting connector 505 is provided in the middle of the connecting conveying pipe 405 and at the top of the second conveying pipe 406. When the connecting interface 5 and the connecting connector 505 are inserted and connected, the one-way conveying valve 501 is opened. When the connecting interface 5 and the connecting connector 505 are separated, the one-way conveying valve 501 is closed.

[0044] In this embodiment, the main tank 1 of the liquid receiver is composed of a first tank 2, a second tank 4, and a third tank 7 stacked from top to bottom. Each tank can be detached and connected. The pipeline conveying structure between the tanks adopts a plug-in quick-connect and quick-disconnect structure, which allows the second tank 4 and the third tank 7, namely the desiccant storage chamber 401 and the sealed filter chamber 701, to be quickly disassembled and installed. When it is necessary to replace the desiccant or clean the filter screen, only the second tank 4 and the third tank 7 need to be disassembled to complete the work, without replacing the entire liquid receiver. During maintenance, the refrigerant is still stored inside the first tank 2, without the need to release, recover, and repressurize the refrigerant. This not only saves material costs but also improves maintenance efficiency.

[0045] As shown in Figures 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, and 14, preferably, the input connection pipe 105 and the output connection pipe 107 of the liquid receiver are connected to the automotive air conditioning cooling pipes through the input interface 106 and the output interface 108 respectively provided at their external ends. The bottom end of the first delivery pipe 3 is located at the center of the bottom surface of the first tank 2, and the top end of the first tank 2 is connected to the input connection pipe 105 and the output connection pipe 107. The output connection pipe 107 is connected to the first delivery pipe 3. The top end of the second delivery pipe 406 is located on the top surface of the second tank 4. The refrigerant is delivered to the refrigerant storage chamber 201 through the input connection pipe 105 and the input sleeve 102, and downwards through the connecting sleeve 203 and the connecting delivery pipe 405 to the desiccant storage chamber 4. 01, and then conveyed downwards to the closed filter chamber 701. After being filtered by the unit filter screen 702, it is sequentially conveyed to the output connecting pipe 107 via the second conveying pipe 406, the first conveying pipe 3, and the central output pipe 103. The bottom of the refrigerant storage chamber 201 is kept sealed by the closed bottom plate 202. The connecting sleeve 203 and the first conveying pipe 3 are both installed through the closed bottom plate 202. The top of the desiccant storage chamber 401 is provided with a filling opening 402, which is closed by a detachable closed top plate 403. The connecting conveying pipe 405 and the second conveying pipe 406 are both installed through the closed top plate 403. The bottom of the top of the desiccant storage chamber 401 is closed by a filter bottom plate 404 with densely packed small holes, which facilitates the passage of refrigerant while intercepting and storing desiccant particles, making it easy to fill and replace the desiccant.

[0046] As shown in Figures 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, and 14, preferably, the one-way delivery valve 501 has a conical channel 502 inside, a sealing valve core 503 is slidably fitted in the middle of the conical channel 502, a sealing spring 504 is provided above the sealing valve core 503, and a central push rod 506 is connected at the center of the connecting joint 505. The central push rod 506 cooperates with the sealing valve core 503. When the connecting interface 5 and the connecting joint 505 are inserted and connected, the central push rod 506 presses the sealing valve core 503 and moves it upward. When the conical channel 502 is opened and the connecting interface 5 and the connecting connector 505 are separated, the closing spring 504 pushes the closing valve core 503 downward to close the conical channel 502, thereby realizing that the one-way delivery valve 501 automatically closes during the disassembly process to prevent the refrigerant from flowing out. A refrigerant charging valve 101 is provided on the side wall of the first tank 2 for adding refrigerant, and a transparent observation window 104 is provided at the top of the central output pipe 103 for observing the internal refrigerant dosage. At the same time, a separation spring 204 is nested on the outside of the connecting sleeve 203 at the bottom of the first delivery pipe 3 to facilitate pushing and separating the first tank 2 and the second tank 4.

[0047] As shown in Figures 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, and 14, preferably, a bypass circulation opening 301 is provided through the middle of the side wall of the first delivery pipe 3 of the reservoir. A central sealing sleeve 302 is nested and slidably provided inside the first delivery pipe 3. The central sealing sleeve 302 and the bypass circulation opening 301 are mutually fitted and configured. The bypass circulation opening 301 is kept closed by the central sealing sleeve 302. A traction linkage rod 303 is connected to the bottom end of the central sealing sleeve 302. The central sealing sleeve 302 is connected to the first delivery pipe 3 by the traction linkage rod 303. The sealing valve cores 503 at the bottom are interconnected. When the sealing valve cores 503 move upward to open the conical channel 502, the central sealing sleeve 302 moves upward synchronously through the traction linkage rod 303 to close the bypass circulation opening 301. Thus, when the second tank 4 is removed, when the sealing valve cores 503 move downward to open the conical channel 502, the central sealing sleeve 302 moves downward synchronously through the traction linkage rod 303 to open the bypass circulation opening 301. At this time, the coolant can be directly delivered to the first delivery pipe 3 through the bypass circulation opening 301, so that the second tank 4 and the third tank 7 can be disassembled and maintained without stopping the vehicle air conditioner.

[0048] As shown in Figures 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, and 14, preferably, a fixed connecting block 6 and a sliding connecting block 601 are respectively connected to the bottom of the first tank 2 and the top of the second tank 4 of the liquid storage container. Thus, the first tank 2 and the second tank 4 are connected to each other through the fixed connecting block 6 and the sliding connecting block 601. The fixed connecting block 6 and the sliding connecting block 601 are connected and locked by a connecting locking pin 608 embedded in a connecting locking groove 602. The connection can be unlocked by pulling the connecting locking pin 608 out of the connecting locking groove 602 with the unlocking lever 609. The reset spring 606 connected in the middle of the connecting locking pin 608 can push the connecting locking pin 608 to reset, which facilitates quick loading and unloading of the second tank 4 and makes operation and maintenance more convenient and faster.

[0049] As shown in Figures 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, and 14, preferably, an electric heating wire 407 is arranged around the top of the desiccant storage compartment 401 of the liquid reservoir. The electric heating wire 407 is electrically connected to a limit switch 408 installed on the top surface of the second tank 4. A limit sleeve 205 is vertically installed on the bottom surface of the first tank 2, and a slidingly nested part is provided inside the limit sleeve 205. The limiting rod 206 has a spring 207 in the middle. When the first tank 2 and the second tank 4 are connected, the limiting rod 206 presses the limiting switch 408 to keep the electric heating wire 407 closed. When the first tank 2 and the second tank 4 are separated, the limiting rod 206 no longer presses the limiting switch 408 to simultaneously turn on the electric heating wire 407. The electric heating wire 407 can heat the desiccant inside the desiccant storage chamber 401 to dehumidify it.

[0050] As shown in Figures 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, and 14, preferably, the length of the central push rod 506 located inside the connecting joint 505 in the middle of the connecting conveying pipe 405 of the liquid reservoir is less than the length of the central push rod 506 located inside the connecting joint 505 at the top of the second conveying pipe 406. Therefore, when the second tank 4 is moved downwards and removed, the one-way conveying valve 501 in the middle of the connecting sleeve 203 will be closed first, and the one-way conveying valve 501 at the bottom of the first conveying pipe 3 will then be closed. Valve 501 remains open, and electric heating wire 407 is also turned on simultaneously. Thus, electric heating wire 407 heats the refrigerant inside the second tank 4. The refrigerant inside the second tank 4 vaporizes and expands due to the heat, which pushes the remaining refrigerant inside the second tank 4 and the third tank 7 to flow upward through the second conveying pipe 406 back to the refrigerant storage chamber 201 inside the first tank 2. Then, when the second tank 4 continues to move downward and is completely removed, the one-way conveying valve 501 at the bottom of the first conveying pipe 3 is also completely closed, thereby realizing the automatic recovery of refrigerant.

[0051] As shown in Figures 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, and 14, preferably, the fixed connecting block 6 of the liquid reservoir is provided with a connecting locking groove 602 and a half-open locking groove 603 in the middle, and two locking sleeves 605 are arranged parallel to each other in the middle of the sliding connecting block 601. The connecting locking pins 608 inside the two locking sleeves 605 are respectively configured to cooperate with the connecting locking groove 602 and the half-open locking groove 603. The bottom height of the half-open locking groove 603 is lower than the bottom height of the connecting locking groove 602. Therefore, when the connecting locking pin 608 in the connecting locking groove 602 disengages from the connecting locking groove 602, the second tank 4 moves downward a certain height, and the connecting locking pin 608 in the half-open locking groove 603 moves to the bottom for limiting. At this time, it remains in a half-open state, which facilitates the recovery of refrigerant. Then, after the connecting locking pin 608 in the half-open locking groove 603 is completely disengaged, the second tank 4 can be completely removed. The sequential closing mechanism and locking structure of the one-way delivery valve 501 ensure that the refrigerant will not accidentally leak out even during the disassembly process, thus enhancing the safety and reliability of the system.

[0052] As shown in Figures 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, and 14, preferably, the top end of the third tank 7 of the liquid reservoir and the bottom end of the second tank 4 are detachably and separably connected by a threaded screw. Multiple unit filter screens 702 are stacked inside the sealed filter chamber 701. Each unit filter screen 702 includes a fixing ring 703, which is nested and slidably and detachably connected to the sealed filter chamber 701. A unit delivery pipe 705 is connected to the center of the fixing ring 703. Both the upper and lower ends of the unit delivery pipe 705 are provided with series interfaces 707. Adjacent unit delivery pipes 705... The components are interconnected via a series interface 707. The unit delivery pipe 705 is connected to the bottom end of the second delivery pipe 406 via the series interface 707. A lateral opening 706 is provided through the middle of the side wall of the unit delivery pipe 705. After the refrigerant is delivered into the third tank 7, it will be filtered by multiple unit filters 702 in sequence. After filtration, the refrigerant is delivered to the unit delivery pipe 705 through the lateral opening 706, and then sequentially delivered upward through multiple unit delivery pipes 705 to the second delivery pipe 406, and then sequentially delivered to the first delivery pipe 3 to complete the filtration. The unit filters 702 are designed as unit structures and are stacked inside the third tank 7 for easy replacement.

[0053] As shown in Figures 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, and 14, preferably, an annular filter frame 8 is nested and slidably arranged inside the fixing ring 703 of the liquid reservoir. An edge sealing ring 805 is arranged around the edge of the annular filter frame 8. A central filter screen 801 is arranged in the middle of the annular filter frame 8. A closed sleeve 802 is arranged at the center of the annular filter frame 8. The closed sleeve 802 is nested and slidably arranged outside the unit delivery pipe 705. The bottom end of the closed sleeve 802... The connection is equipped with a flexible support frame 803, with a pre-set flexible bend 804 in the middle. The bottom end of the closed sleeve 802 is connected to the bottom end of the unit delivery pipe 705 through the flexible support frame 803. The lower half of the fixed mounting ring 703 is surrounded by multiple edge connecting grooves 704. When the refrigerant is filtered, it will be filtered through the central filter screen 801. After passing downward through the central filter screen 801, it will be preferentially conveyed to the unit delivery pipe 705 through the side opening 706, and then sequentially conveyed upward through multiple unit delivery pipes 705 to the next unit delivery pipe. The two delivery pipes 406 output the material. When the central filter 801 becomes clogged, the overall resistance increases significantly, causing the annular filter frame 8 and the central filter 801 to move downwards. When the clogging of the central filter 801 reaches a set value, i.e., when the resistance exceeds the full deformation support force of the flexible support frame 803, the flexible support frame 803 can no longer support the complete breakage along the preset flexible bend 804. After losing its support, the central filter 801 slides downwards to the bottom of the unit delivery pipe 705. At this point, the sealing sleeve 802 completely covers and seals the corresponding unit. The lateral opening 706 on the delivery pipe 705, and the edge sealing ring 805 at the edge of the annular filter frame 8, move below the edge connecting groove 704. At this point, the refrigerant will preferentially pass through the edge connecting groove 704, bypassing the uppermost central filter screen 801, and then be filtered through the lower central filter screen 801. Through the stacked multi-layer unit filters 702, sequential filtration can be achieved. The flexible support frame 803 and the pre-set flexible bending structure 804 provide an automatic response mechanism when the central filter screen 801 becomes clogged. When the central filter screen 801 becomes clogged, causing increased resistance, the system can automatically adjust, moving the annular filter frame 8 and the central filter screen 801 downwards as a whole, ensuring unobstructed refrigerant flow and preventing system malfunctions caused by filter clogging.

[0054] As shown in Figures 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, and 14, preferably, when the humidity sensor 904 of the reservoir detects excessive humidity, the car computer connected to the reservoir controls the unlocking coil 607. The unlocking coil 607, when energized, generates a magnetic force that controls the movement of the ferromagnetic connecting locking pin 608 to unlock. First, the connecting locking pin 608 in the connecting locking groove 602 disengages from the groove, remaining in a semi-open state. Heating causes the refrigerant to vaporize, expand, and flow back to the first tank 2, achieving refrigerant recovery. Then, the connecting locking pin 608 in the semi-open locking groove 603 is completely disengaged, and the second tank 4 naturally moves downwards, separating from the first tank 2. Simultaneously, the magnetic attraction of the reset electromagnet 604 controls the distance between the first tank 2 and the second tank 4, preventing the second tank 4 from falling completely. When the desiccant is separated from the container, all one-way valves are closed. Then, the annular heating element 9 can heat and dry the desiccant stored in the desiccant storage chamber 401, which is usually a molecular sieve, through multiple heating fins 901. At the same time, the solenoid valve 903 is opened, allowing the heated water vapor to be discharged through the heating output pipe 902. After heating and drying for a period of time, when the humidity sensor 904 detects that the humidity meets the standard, the magnetic force of the reset electromagnet 604 attracts the first tank 2 and the second tank 4 to reconnect, and the solenoid valve 903 and the annular heating element 9 are closed. At the same time, the connection locking pin 608 is reset. Thus, by installing the humidity sensor 904 inside the desiccant storage chamber 401, real-time monitoring of excessive humidity of the desiccant is achieved. Once the humidity exceeds the standard, the system can automatically trigger a series of operations, including unlocking, refrigerant recovery, and desiccant heating and drying, which helps to further improve the service life and maintenance cycle of the liquid receiver.

[0055] The present invention provides a stacked liquid receiver for automotive air conditioning. The main tank 1 of the liquid receiver is composed of a first tank 2, a second tank 4, and a third tank 7 stacked from top to bottom. Each tank can be detachably connected. The pipeline conveying structure between the tanks adopts a plug-in quick-connect and quick-disconnect structure, which allows the second tank 4 and the third tank 7, namely the desiccant storage chamber 401 and the sealed filter chamber 701, to be quickly disassembled and installed. When it is necessary to replace the desiccant or clean the filter, only the second tank 4 and the third tank 7 need to be disassembled to complete the work, without replacing the entire liquid receiver. During maintenance, the refrigerant is still stored inside the first tank 2, without the need to release, recover, and repressurize the refrigerant. This not only saves material costs but also improves maintenance efficiency.

[0056] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the invention is limited to these examples; within the framework of the invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity. Any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the invention should be included within the scope of protection of the invention.

Claims

1. A stacked liquid reservoir for automotive air conditioning, comprising a main tank (1), wherein the main tank (1) is composed of a first tank (2), a second tank (4), and a third tank (7) stacked from top to bottom, characterized in that, Also includes: A refrigerant storage chamber (201) is located inside the first tank (2). A connecting sleeve (203) is provided through the middle of the bottom surface of the first tank (2). A first conveying pipe (3) is vertically provided at the center of the refrigerant storage chamber (201). A desiccant storage chamber (401) is disposed inside the second tank (4). The top of the second tank (4) is detachably connected to the bottom of the first tank (2). A connecting conveying pipe (405) is provided through the middle of the top surface of the second tank (4). The connecting conveying pipe (405) and the connecting sleeve (203) are provided corresponding to each other. A second conveying pipe (406) is vertically provided at the center of the desiccant storage chamber (401). A closed filter chamber (701) is disposed inside the third tank (7), the top of the third tank (7) is detachably connected to the bottom of the second tank (4), and a unit filter screen (702) is disposed inside the closed filter chamber (701); A connecting interface (5) is provided in the middle of the connecting sleeve (203) and at the bottom of the first conveying pipe (3). A one-way conveying valve (501) is installed in the middle of the connecting interface (5). A connecting connector (505) is provided in the middle of the connecting conveying pipe (405) and at the top of the second conveying pipe (406). When the connecting interface (5) and the connecting connector (505) are inserted and connected, the one-way conveying valve (501) is opened. When the connecting interface (5) and the connecting connector (505) are separated, the one-way conveying valve (501) is closed.

2. The stacked liquid receiver for automotive air conditioning according to claim 1, characterized in that, The bottom end of the first conveying pipe (3) is located at the center of the bottom surface of the first tank (2). The top end of the first tank (2) is connected to an input connecting pipe (105) and an output connecting pipe (107). The output connecting pipe (107) is connected to the first conveying pipe (3). The top end of the second conveying pipe (406) is located on the top surface of the second tank (4). An input sleeve (102) is provided at the center of the top of the main tank (1). A central output pipe (103) is nested and spaced inside the input sleeve (102). The top end of the input sleeve (102) is connected to the input connecting pipe (105). The bottom opening of the input sleeve (102) is located in the refrigerant storage compartment (201). At the top, the output connecting pipe (107) is connected to the first conveying pipe (3) through the central output pipe (103). The first conveying pipe (3) is connected to the second conveying pipe (406) through the connecting interface (5) and the connecting connector (505). The refrigerant is conveyed to the refrigerant storage chamber (201) through the input connecting pipe (105) and the input sleeve (102), and then conveyed downward through the connecting sleeve (203) and the connecting conveying pipe (405) to the desiccant storage chamber (401), and then conveyed downward to the closed filter chamber (701). After being filtered by the unit filter screen (702), it is conveyed to the output connecting pipe (107) in sequence through the second conveying pipe (406), the first conveying pipe (3) and the central output pipe (103).

3. The stacked liquid receiver for automotive air conditioning according to claim 1, characterized in that, The one-way delivery valve (501) has a conical channel (502) inside. A sealing valve core (503) is slidably fitted in the middle of the conical channel (502). A sealing spring (504) is provided above the sealing valve core (503). A central push rod (506) is connected to the center of the connecting joint (505). The central push rod (506) and the sealing valve core (503) cooperate with each other. When the connecting interface (5) and the connecting joint (505) are inserted and connected, the central push rod (506) presses the sealing valve core (503) upward to open the conical channel (502). When the connecting interface (5) and the connecting joint (505) are separated, the sealing spring (504) pushes the sealing valve core (503) downward to close the conical channel (502).

4. The stacked liquid receiver for automotive air conditioning according to claim 3, characterized in that, A bypass circulation opening (301) is provided through the middle of the side wall of the first conveying pipe (3). A central sealing sleeve (302) is nested and slidably provided inside the first conveying pipe (3). The central sealing sleeve (302) and the bypass circulation opening (301) are configured to cooperate with each other. The bypass circulation opening (301) is kept closed by the central sealing sleeve (302). A traction linkage rod (303) is connected to the bottom end of the central sealing sleeve (302). The central sealing sleeve (302) is connected to the traction linkage rod (303). 303) is connected to the closed valve core (503) provided at the bottom end of the first conveying pipe (3). When the closed valve core (503) moves upward to open the conical channel (502), the central closed sleeve (302) is driven to move upward synchronously through the traction linkage rod (303) to close the bypass circulation opening (301). When the closed valve core (503) moves downward to open the conical channel (502), the central closed sleeve (302) is driven to move downward synchronously through the traction linkage rod (303) to open the bypass circulation opening (301).

5. The stacked liquid receiver for automotive air conditioning according to claim 4, characterized in that, The bottom end of the first tank (2) and the top end of the second tank (4) are respectively connected to a fixed connecting block (6) and a sliding connecting block (601). The fixed connecting block (6) and the sliding connecting block (601) are vertically connected to each other. The fixed connecting block (6) is provided with a connecting locking groove (602) in the middle. The sliding connecting block (601) is provided with a locking sleeve (605) in the middle horizontally. The inner side of the locking sleeve (605) is nested and slidably provided with a connecting locking pin (608). The connecting locking pin (608) and the connecting locking groove (602) are mutually connected. The rear end of the connecting locking pin (608) is connected to an unlocking lever (609).

6. The stacked liquid receiver for automotive air conditioning according to claim 5, characterized in that, The top of the desiccant storage compartment (401) is surrounded by an electric heating wire (407). A limit switch (408) is installed on the top surface of the second tank (4). A limit sleeve (205) is installed vertically on the bottom surface of the first tank (2). A limit rod (206) is nested and slidably arranged inside the limit sleeve (205). A rod spring (207) is arranged in the middle of the limit rod (206). The limit rod (206) and the limit switch (408) are configured to cooperate with each other. When the first tank (2) and the second tank (4) are connected to each other, the limit rod (206) presses the limit switch (408) to keep the electric heating wire (407) closed. When the first tank (2) and the second tank (4) are separated from each other, the limit rod (206) no longer presses the limit switch (408) to simultaneously turn on the electric heating wire (407).

7. The stacked liquid receiver for automotive air conditioning according to claim 6, characterized in that, The length of the central push rod (506) located inside the connecting joint (505) in the middle of the connecting conveying pipe (405) is less than the length of the central push rod (506) located inside the connecting joint (505) at the top of the second conveying pipe (406). When the first tank (2) and the second tank (4) are separated from each other, the one-way conveying valve (501) located inside the connecting interface (5) in the middle of the connecting sleeve (203) is installed before the connecting interface (5) at the bottom of the first conveying pipe (3). The one-way delivery valve (501) is closed. The fixed connecting block (6) is provided with a connecting locking groove (602) and a half-open locking groove (603) in the middle. The sliding connecting block (601) is provided with two locking sleeves (605) in parallel in the middle. The connecting locking pins (608) inside the two locking sleeves (605) are respectively configured to cooperate with the connecting locking groove (602) and the half-open locking groove (603). The bottom height of the half-open locking groove (603) is lower than the bottom height of the connecting locking groove (602).

8. The stacked liquid receiver for automotive air conditioning according to claim 1, characterized in that, The top of the third tank (7) and the bottom of the second tank (4) are detachably and closedly connected by screwing. Multiple unit filters (702) are stacked inside the closed filter chamber (701). Each unit filter (702) includes a fixed mounting ring (703). The fixed mounting ring (703) is nested and slidably and detachably connected to the closed filter chamber (701). A unit conveying pipe (705) is connected to the center of the fixed mounting ring (703). Both the upper and lower ends of the unit conveying pipe (705) are provided with a series interface (707). Adjacent unit conveying pipes (705) are connected to each other through the series interface (707). The unit conveying pipe (705) is connected to the bottom of the second conveying pipe (406) through the series interface (707). A lateral opening (706) is provided through the middle of the side wall of the unit conveying pipe (705).

9. The stacked liquid receiver for automotive air conditioning according to claim 8, characterized in that, An annular filter frame (8) is nested and slidably arranged inside the fixed mounting ring (703). An edge sealing ring (805) is arranged around the edge of the annular filter frame (8). A central filter screen (801) is arranged in the middle of the annular filter frame (8). A closed sleeve (802) is arranged in the center of the annular filter frame (8). The closed sleeve (802) is nested and slidably arranged outside the unit conveying pipe (705). A flexible support frame (803) is connected to the bottom end of the closed sleeve (802). A preset flexible bend (804) is arranged in the middle of the flexible support frame (803). The bottom end of the closed sleeve (802) is connected to the bottom end of the unit conveying pipe (705) through the flexible support frame (803). A plurality of edge connecting grooves (704) are arranged around the lower half of the fixed mounting ring (703).

10. The stacked liquid receiver for automotive air conditioning according to claim 5, characterized in that, The desiccant storage chamber (401) is surrounded by an annular heating tube (9) at the bottom. Multiple heating fins (901) are evenly connected around the middle of the annular heating tube (9). A heating output tube (902) is connected to the top of the side wall of the second tank (4). An electromagnetic switch valve (903) is installed in the middle of the heating output tube (902). An unlocking coil (607) is surrounded around the middle of the locking sleeve (605). A humidity sensor (904) is installed inside the desiccant storage chamber (401). A reset electromagnet (604) is surrounded around the bottom of the first tank (2) and the top of the second tank (4).

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