CN116877713A - Thermal expansion valve of automobile air conditioner - Google Patents

Thermal expansion valve of automobile air conditioner Download PDF

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Publication number
CN116877713A
CN116877713A CN202310924132.2A CN202310924132A CN116877713A CN 116877713 A CN116877713 A CN 116877713A CN 202310924132 A CN202310924132 A CN 202310924132A CN 116877713 A CN116877713 A CN 116877713A
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CN
China
Prior art keywords
valve
sliding
bottom end
cylinder
tube
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
CN202310924132.2A
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Chinese (zh)
Inventor
施文祥
江明开
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ningbo Boheng Auto Parts Co ltd
Original Assignee
Ningbo Boheng Auto Parts Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ningbo Boheng Auto Parts Co ltd filed Critical Ningbo Boheng Auto Parts Co ltd
Priority to CN202310924132.2A priority Critical patent/CN116877713A/en
Publication of CN116877713A publication Critical patent/CN116877713A/en
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/52—Means for additional adjustment of the rate of flow
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/36—Valve members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K47/00—Means in valves for absorbing fluid energy
    • F16K47/01—Damping of valve members
    • F16K47/012—Damping of valve members by means of a resilient damping element
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/31—Expansion valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2341/00—Details of ejectors not being used as compression device; Details of flow restrictors or expansion valves
    • F25B2341/06—Details of flow restrictors or expansion valves

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Temperature-Responsive Valves (AREA)

Abstract

The invention discloses a thermal expansion valve of an automobile air conditioner, which comprises a valve body with a liquid inlet and a liquid outlet, a power head arranged at the top end of the valve body, a valve rod arranged in the valve body and in transmission connection with the power head, and a valve plug arranged on the valve rod, wherein a valve chamber is arranged in the valve body, a valve hole capable of communicating the liquid inlet with the liquid outlet is arranged in the valve chamber, and a plugging piece is also arranged in the valve chamber.

Description

Thermal expansion valve of automobile air conditioner
Technical Field
The invention relates to the technical field of expansion valves, in particular to a thermal expansion valve of an automobile air conditioner.
Background
The thermostatic expansion valve is a commonly used throttling component for air conditioning and refrigeration equipment, and can throttle and depressurize liquid refrigerant from a condenser, and regulate the flow of the refrigerant sent from the condenser to the evaporator according to the temperature of the outlet of the evaporator so as to adapt to the requirement of continuous change of refrigeration load. The general principle of the thermostatic expansion valve for controlling the flow of refrigerant is: the temperature of the outlet of the evaporator is sensed by the air box head, the medium in the air box head generates thermal expansion with corresponding degree according to the temperature sensed by the air box head, the valve rod connected with the air box head is pressurized by the thermal expansion, and the valve core is pushed by the push rod to move under the driving of the pressure, so that the opening of the valve hole is regulated, and the effect of regulating the flow of the refrigerant is achieved.
In the prior art, when the valve plug in the expansion valve no longer seals the channel in the valve body, the channel in the valve body is in a communication state, but once the valve plug no longer seals the channel, the opening area between the plug rod and the plug hole can not change, so that the flow of the inside refrigerant is in a fixed state, and when the temperature in the automobile suddenly rises, the temperature can not be rapidly reduced, and the use comfort of the automobile is further reduced.
Chinese patent CN112413938B discloses a thermostatic expansion valve for an automotive air conditioner, comprising a valve body; a power head is fixedly connected to the top end of the valve body; a diaphragm is fixedly connected in the power head; one side of the valve body is provided with a liquid inlet, and the other side of the valve body is provided with a liquid outlet; a valve cavity is formed in the valve body; the valve cavity is positioned below the liquid outlet and is communicated through the first liquid inlet; the liquid inlet and the valve cavity are communicated with each other; the bottom end of the valve body is connected with an adjusting seat in a threaded manner; the top end of the adjusting seat is positioned in the valve cavity; the bottom end of the membrane is fixedly connected with a push rod; the end part of the ejector rod, which is far away from the diaphragm, penetrates through the valve body, enters the valve cavity through the first liquid inlet hole, and is fixedly connected with a semicircular ball valve.
According to the expansion valve, the valve holes are formed in the valve cavity, so that the expansion valve is a rapid flow cylinder for the refrigerant in the expansion valve when the temperature of an automobile rises suddenly, however, the opening and closing modes of the valve holes in the expansion valve are complex in structure and high in cost, and the parts in the valve cavity are easily damaged by the refrigerant flowing at high speed, so that the actual use effect of the expansion valve is affected.
Disclosure of Invention
According to the thermal expansion valve of the automobile air conditioner, the plugging piece which is slidably communicated with the liquid inlet and the liquid outlet is arranged in the valve body, so that in a normal state, the valve plug opens the valve hole to deal with the flow of the refrigerant in a normal state, and when the temperature in the automobile rises suddenly, the valve rod drives the plugging piece to slide to enable the liquid inlet to be directly communicated with the liquid outlet, so that the rapid circulation of the refrigerant in the state is met, the thermal expansion valve is simple in structure and lower in cost, and the problem that the existing expansion valve cannot conduct the refrigerant rapidly in the state of rising the temperature in the automobile is solved.
In order to solve the problems in the prior art, the invention provides an automobile air conditioner thermal expansion valve, which comprises a valve body with a liquid inlet and a liquid outlet, a power head arranged at the top end of the valve body, a valve rod arranged in the valve body and in transmission connection with the power head, and a valve plug arranged on the valve rod, wherein a valve chamber is arranged in the valve body, a valve hole capable of communicating the liquid inlet with the liquid outlet is arranged in the valve chamber, a plugging piece capable of communicating the liquid inlet with the liquid outlet in a sliding manner is also arranged in the valve chamber, the valve plug can be abutted against the plugging piece, the opening of the plugging piece is increased along with the increase of the sliding travel of the plugging piece, and in a working state, the valve plug is separated from the valve hole and then drives the plugging piece to slide so as to communicate the liquid inlet with the liquid outlet.
Preferably, the expansion valve further comprises a connecting pipe arranged in the valve chamber, the bottom end of the connecting pipe is closed, the valve hole is coaxially arranged at the bottom end of the connecting pipe, and the connecting pipe is provided with a liquid passing hole; the plugging piece comprises a first sliding cylinder and a first elastic element, wherein the first sliding cylinder is coaxially arranged at the bottom end of the connecting pipe in a sliding manner, the bottom end of the first sliding cylinder is connected with the bottom end of the valve chamber through the first elastic element, the top end of the first sliding cylinder is elastically abutted to the closed bottom end of the connecting pipe, a fixing frame positioned at the bottom of the valve plug is arranged in the first sliding cylinder, and in a working state, the valve plug is abutted to the fixing frame after being separated from the valve hole, and then drives the first sliding cylinder to move downwards.
Preferably, the expansion valve further comprises a liquid inlet pipe, the liquid inlet pipe is coaxially screwed in the liquid inlet, a first butt joint barrel coaxial with the liquid inlet pipe is arranged at the top end of the liquid inlet pipe, a sliding cavity is formed between the outer circumferential surface of the first butt joint barrel and the inner wall of the valve cavity, the outer diameter of the first butt joint barrel is smaller than that of the liquid inlet pipe, the first sliding barrel is provided with a butt joint barrel coaxially and slidingly arranged at the bottom end of the connecting pipe, the outer diameter of the first sliding barrel is larger than that of the connecting ring of the butt joint barrel, the outer edge of the connecting ring downwards extends to form a second butt joint barrel, the second butt joint barrel slides in the sliding cavity, and the first elastic element is arranged in the sliding cavity.
Preferably, the fixing frame includes a suspension ring coaxially disposed in the first sliding cylinder, and a connection rod connecting between an outer circumferential surface of the suspension ring and an inner circumferential surface of the first sliding cylinder, the connection rod extending obliquely upward from the inner circumferential surface of the first sliding cylinder.
Preferably, the valve body comprises an upper valve block, a lower valve block and a spacer block, the upper valve block and the lower valve block are connected from top to bottom, the spacer block is arranged between the upper valve block and the lower valve block, the spacer block divides the valve chamber into an upper valve cavity in the upper valve block and a lower valve cavity in the lower valve block, the power head is connected with the upper valve cavity, the connecting pipe is arranged at the bottom end of the spacer block, the bottom end of the inner circumferential surface of the connecting pipe is provided with a stepped groove, the expansion valve further comprises a baffle coaxially arranged in the stepped groove, the valve hole is positioned at the center of the baffle, the valve plug is arranged at the bottom end of the valve rod, and in an initial state, the valve plug is larger than the valve hole and is abutted to the bottom end of the valve hole.
Preferably, the bottom end of the spacer is further provided with a placement groove, the expansion valve further comprises a second sliding cylinder arranged in the placement groove, and a second elastic element arranged at the top end of the second sliding cylinder and the top end of the placement groove, the bottom end of the second sliding cylinder is provided with a buffer ring, and the valve rod penetrates through the buffer ring and is in sliding fit with the buffer ring.
Preferably, a diaphragm of an arch center is arranged in the power head, a wide pipe is arranged at the top end of the upper valve cavity, the top end of the wide pipe is connected with the diaphragm, a narrow pipe coaxial with the wide pipe is arranged at the top end of the partition block, the bottom end of the wide pipe is communicated with the top end of the narrow pipe, the valve rod is coaxially and slidingly arranged in the narrow pipe, the expansion valve further comprises a piston and a third elastic element, the piston is coaxially and slidingly arranged in the narrow pipe, the top end of the valve rod penetrates through the piston and is fixedly connected with the piston, and the third elastic element is arranged between the piston and the partition block.
Preferably, the bottom end of the wide tube is provided with a sealing ring coaxial with the wide tube, and the bottom end of the sealing ring extends downwards to form a threaded cylinder which is coaxially and threadedly connected with the top end of the narrow tube.
Preferably, the circumference of the valve rod is provided with two ring grooves, the expansion valve further comprises a C-shaped ring coaxially clamped in the ring grooves, and the piston is positioned between the two C-shaped rings.
Preferably, the spacer block center position has first settling port and second settling port from top to bottom in proper order, the internal diameter of first settling port is greater than the internal diameter of second settling port, the bottom and the top threaded connection of first settling port of narrow pipe, the bottom of narrow pipe is provided with downwardly extending's positioning tube, the second slide tube has the inner wall of first settling port with the gliding sliding part between the outer periphery of positioning tube to and the gliding buffer ring between the inner wall of second settling port and the circumference of valve rod, and connect the connecting portion of sliding part and buffer ring, the second elastic element sets up between sliding part and the bottom of narrow pipe.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the plugging piece which can be slidably communicated with the liquid inlet and the liquid outlet is arranged in the valve body, so that the valve plug opens the valve hole to deal with the flow of the refrigerant in a normal state, and when the temperature in the automobile rises suddenly, the valve rod drives the plugging piece to slide so as to enable the liquid inlet to be directly communicated with the liquid outlet, thereby meeting the rapid circulation of the refrigerant in the state, having simple structure and lower cost, and solving the problem that the existing expansion valve cannot rapidly conduct the refrigerant in the state of rising the temperature in the automobile.
Drawings
Fig. 1 is a perspective view of a thermostatic expansion valve of an automotive air conditioner.
Fig. 2 is a perspective sectional view of a thermostatic expansion valve of an automobile air conditioner.
Fig. 3 is a cross-sectional view of a thermostatic expansion valve of an automotive air conditioner.
Fig. 4 is a partial enlarged view at a of fig. 3.
Fig. 5 is a schematic view of a thermal expansion valve of an automotive air conditioner when a valve hole is opened.
Fig. 6 is a schematic view of a thermal expansion valve of an automotive air conditioner when both a valve hole and a fluid passage are opened.
Fig. 7 is a partial enlarged view at B of fig. 3.
Fig. 8 is a partial enlarged view at C of fig. 3.
Fig. 9 is a partial perspective exploded view of a thermal expansion valve of an automotive air conditioner.
Fig. 10 is an exploded perspective view of a closure member in a thermostatic expansion valve of an automotive air conditioner.
Fig. 11 is an exploded perspective view of a spacer, a wide tube and a narrow tube in a thermostatic expansion valve of an automotive air conditioner.
The reference numerals in the figures are: 1-a valve body; 11-a liquid inlet; 12-a liquid outlet; 13-a liquid inlet pipe; 131-a first docking cylinder; 14-an upper valve block; 15-a lower valve block; 16-spacer blocks; 2-a power head; 21-a separator; 3-a valve stem; 4-a valve plug; 5-a closure; 511-a mount; 512-abutting the barrel; 513-a connecting ring; 514-a second docking cylinder; 52-a first elastic element; 6-connecting pipes; 61-a liquid passing hole; -a second sliding cylinder; 711-slide part; 712-connection; 72-a second elastic element; 73-a buffer ring; 74-a separator; 81-widening the tube; 811-a sealing ring; 812-thread cylinder; 82-narrow tube; 821-positioning a tube; 83-a piston; 84-a third elastic element; 9-C type circle.
Detailed Description
The invention will be further described in detail with reference to the drawings and the detailed description below, in order to further understand the features and technical means of the invention and the specific objects and functions achieved.
As shown in fig. 1 and 2, the present invention provides:
the utility model provides an automotive air conditioner thermostatic expansion valve, includes valve body 1 that has inlet 11 and liquid outlet 12 to and set up in the unit head 2 on valve body 1 top, and set up valve rod 3 that is in valve body 1 and is connected with the unit head 2 transmission, and set up the valve plug 4 on valve rod 3, set up the valve chamber in valve body 1, be provided with the valve opening that can communicate inlet 11 and liquid outlet 12 in the valve chamber, still be provided with the shutoff piece 5 that can communicate inlet 11 and liquid outlet 12 in the valve chamber in the slip, valve plug 4 can with shutoff piece 5 looks butt, the aperture of shutoff piece 5 increases along with its increase of sliding travel, under the operating condition, drive shutoff piece 5 after the valve opening breaks away from and slides in order to communicate inlet 11 and liquid outlet 12.
When using, valve plug 4 butt is in the jack department, and simultaneously shutoff piece 5 also is in the shutoff state, pours into refrigerant into in valve body 1 through inlet 11, and under the effect of unit head 2, valve rod 3 drives valve plug 4 and removes for valve plug 4 withdraws from the valve opening, and then opens the valve opening, makes the refrigerant flow to liquid outlet 12 through the valve opening.
Because the aperture of valve opening is the same throughout for the flow that passes the refrigerant is limited, when the temperature suddenly rises in the car, power head 2 drives valve rod 3 and removes more distances, make valve plug 4 break away from behind the valve opening, and direct and shutoff piece 5 are connected, make shutoff piece 5 take place to slide under the gliding effect of valve rod 3, with this direct intercommunication inlet 11 and liquid outlet 12, and then can effectively improve the flow of refrigerant in valve body 1, simultaneously when the temperature drops in the car, valve rod 3 moves up, shutoff piece 5 resets, inlet 11 and liquid outlet 12 only communicate through the valve opening this moment.
According to the embodiment, the plugging piece 5 which is slidably communicated with the liquid inlet 11 and the liquid outlet 12 is arranged in the valve body 1, so that in a normal state, the valve plug 4 opens the valve hole to deal with the flow of the refrigerant in the normal state, and when the temperature in the automobile rises suddenly, the valve rod 3 drives the plugging piece 5 to slide so that the liquid inlet 11 is directly communicated with the liquid outlet 12, and therefore the rapid circulation of the refrigerant in the state is met, the structure is simple, the cost is lower, and the problem that the existing expansion valve cannot rapidly conduct the refrigerant in the state of the temperature rising suddenly in the automobile is solved.
As shown in fig. 3, 4, 5 and 6, the expansion valve further comprises a connecting pipe 6 arranged in the valve chamber, the bottom end of the connecting pipe 6 is closed, a valve hole is coaxially arranged at the bottom end of the connecting pipe 6, and a liquid passing hole 61 is formed in the connecting pipe 6; the plugging piece 5 comprises a first sliding cylinder and a first elastic element 52, the first sliding cylinder is coaxially and slidingly arranged at the bottom end of the connecting pipe 6, the bottom end of the first sliding cylinder is connected with the bottom end of the valve chamber through the first elastic element 52, the top end of the first sliding cylinder is elastically abutted to the closed bottom end of the connecting pipe 6, a fixing frame 511 positioned at the bottom of the valve plug 4 is arranged in the first sliding cylinder, and in a working state, the valve plug 4 is abutted to the fixing frame 511 after being separated from a valve hole, and then drives the first sliding cylinder to move downwards.
When the temperature in the automobile rises, the valve rod 3 drives the valve plug 4 to move downwards for a short distance, so that the valve plug 4 is separated from the valve hole, and the valve hole is communicated with the liquid inlet 11 and the liquid outlet 12, so that the expansion valve is convenient for guiding the refrigerant in a conventional state.
When the temperature in the automobile suddenly rises, the valve rod 3 drives the valve plug 4 to directly move downwards for a longer distance, so that the valve plug 4 is abutted on the fixing frame 511 after being separated from the valve hole, and simultaneously, an abutting acting force is applied to the fixing frame 511, the fixing frame 511 drives the first sliding cylinder to overcome the elastic force of the first elastic element 52, so that the top end of the first sliding cylinder is separated from the closed bottom end of the connecting pipe 6, a new fluid channel is formed between the top end of the first sliding cylinder and the closed bottom end of the connecting pipe 6, and then the refrigerant in the liquid inlet 11 flows to the liquid outlet 12 through the fluid channel.
As shown in fig. 3 and 4, the expansion valve further comprises a liquid inlet pipe 13, the liquid inlet pipe 13 is coaxially screwed in the liquid inlet 11, a first butt joint cylinder 131 coaxial with the liquid inlet pipe 13 is arranged at the top end of the liquid inlet pipe, a sliding cavity is formed between the outer circumferential surface of the first butt joint cylinder 131 and the inner wall of the valve cavity, the outer diameter of the first butt joint cylinder 131 is smaller than that of the liquid inlet pipe 13, the first sliding cylinder is provided with a butt joint cylinder 512 coaxially and slidingly arranged at the bottom end of the connecting pipe 6, and a connecting ring 513 with the outer diameter larger than that of the butt joint cylinder 512, the outer edge of the connecting ring 513 extends downwards to form a second butt joint cylinder 514, the second butt joint cylinder 514 slides in the sliding cavity, and the first elastic element 52 is arranged in the sliding cavity.
By screwing the top end of the feed liquid pipe 13 into the feed liquid port 11, a complete sliding cavity is formed between the first butt joint barrel 131 at the top end of the feed liquid pipe 13 and the inner wall of the valve cavity, the second butt joint barrel 514 is coaxially and slidably arranged in the sliding cavity, and the first elastic element 52 is arranged in the sliding cavity, so that the butt joint barrel 512 can be elastically abutted against the closed bottom end of the connecting pipe 6 due to the fact that the butt joint barrel 512 is connected with the second butt joint barrel 514 through the connecting ring 513 until the valve plug 4 is abutted against the fixed frame 511 and drives the butt joint barrel 512 to move downwards, the second butt joint barrel 514 overcomes the elastic force of the first elastic element 52 and then a fluid channel is formed between the top end of the second butt joint barrel 514 and the closed bottom end of the connecting pipe 6.
As shown in fig. 4, the fixing frame 511 includes a suspension ring coaxially disposed in the first sliding cylinder, and a connection rod connecting between an outer circumferential surface of the suspension ring and an inner circumferential surface of the first sliding cylinder, the connection rod extending obliquely upward from the inner circumferential surface of the first sliding cylinder.
By disposing the suspension ring in the first sliding cylinder and connecting the outer circumferential surface of the suspension ring and the inner circumferential surface of the first sliding cylinder by the connecting rod in an inclined manner, it is possible to reduce the resistance of the suspension ring and the connecting rod to the refrigerant when the refrigerant flows from the liquid inlet 11 to the valve hole, thereby preventing turbulence from occurring when the refrigerant flows in the first sliding cylinder.
As shown in fig. 3, 9 and 10, the valve body 1 includes an upper valve block 14, a lower valve block 15 and a spacer 16, the upper valve block 14 and the lower valve block 15 are connected from top to bottom, the spacer 16 is disposed between the upper valve block 14 and the lower valve block 15, the spacer 16 divides the valve chamber into an upper valve cavity in the upper valve block 14 and a lower valve cavity in the lower valve block 15, the power head 2 is connected with the upper valve cavity, the connecting pipe 6 is disposed at the bottom end of the spacer 16, a stepped groove is disposed at the bottom end of the inner circumferential surface of the connecting pipe 6, the expansion valve further includes a partition 74 coaxially disposed in the stepped groove, the valve hole is disposed at the center of the partition 74, the valve plug 4 is disposed at the bottom end of the valve rod 3, and in an initial state, the valve plug 4 is larger than the valve plug and abuts at the bottom end of the valve hole.
The structure for arranging the valve rod 3, the valve plug 4 and the plugging piece 5 is formed by the upper valve block 14, the lower valve block 15 and the spacer 16, the upper valve block 14 and the lower valve block 15 form independent upper valve cavity and lower valve cavity by arranging the spacer 16 between the upper valve block 14 and the lower valve block 15, the plugging piece 5 is arranged in the lower valve cavity, when the valve rod 3 drives the valve plug 4 to move downwards, the valve plug 4 withdraws from the bottom end of the valve hole, the valve hole is opened, a narrow-gap channel is formed between the valve hole and the valve rod 3, and the refrigerant enters the connecting pipe 6 through the channel, passes through the liquid passing hole 61 and flows to the liquid outlet 12.
After the valve rod 3 drives the valve plug 4 to move downwards continuously, the valve plug 4 is abutted on the fixing frame 511 and drives the first sliding cylinder to move downwards, so that the top end of the first sliding cylinder and the bottom end of the connecting pipe 6 are opened, and then the liquid inlet 11 and the liquid outlet 12 are directly communicated, and the flow of the refrigerant can be greatly improved.
As shown in fig. 7, the bottom end of the spacer 16 is further provided with a seating groove, the expansion valve further comprises a second sliding cylinder disposed in the seating groove, and a second elastic member 72 disposed at the top end of the second sliding cylinder and the top end of the seating groove, the bottom end of the second sliding cylinder has a buffer ring 73, and the valve stem 3 penetrates the buffer ring 73 and is slidably engaged therewith.
In a normal state, the refrigerant enters the connecting pipe 6 after passing through the valve hole, and then flows to the liquid outlet 12 through the liquid passing hole 61, the flow path of the refrigerant has a vertical inflection point, namely, after the refrigerant impacts the inner top end of the connecting pipe 6 longitudinally, the refrigerant passes through the liquid passing hole transversely, when the refrigerant impacts the inner top end of the connecting pipe 6, the valve body 1 integrally vibrates, noise is generated, the second sliding cylinder is slidably arranged in the mounting groove, namely, the second sliding cylinder is elastically arranged at the inner top end of the connecting pipe 6 through the second elastic element 72, so that the acting force of the refrigerant on the spacer 16 can be buffered through the elastic force of the second elastic element 72 by the buffer ring 73, and the integral structure is more stable.
As shown in fig. 3 and 8, the power head 2 is provided with a diaphragm 21 with an arch center, the top end of the upper valve cavity is provided with a wide pipe 81, the top end of the wide pipe 81 is connected with the diaphragm 21, the top end of the spacer 16 is provided with a narrow pipe 82 coaxial with the wide pipe, the bottom end of the wide pipe 81 is communicated with the top end of the narrow pipe 82, the valve rod 3 is coaxially and slidingly arranged in the narrow pipe 82, the expansion valve further comprises a piston 83 and a third elastic element 84, the piston 83 is coaxially and slidingly arranged in the narrow pipe 82, the top end of the valve rod 3 penetrates through the piston 83 and is fixedly connected with the piston 83, and the third elastic element 84 is arranged between the piston 83 and the spacer 16.
When the pressure at the top of the diaphragm 21 increases, the diaphragm 21 arched upwards in the center can arch downwards, so that the pressure in the wide pipe 81 increases, the wide pipe 81 is communicated with the narrow pipe 82, the pressure controlled by the narrow pipe 82 increases, the inner diameter of the wide pipe 81 is larger than that of the narrow pipe 82, the acting force borne by the top end of the piston 83 is larger, the piston 83 can overcome the elastic force of the third elastic element 84 to slide for a larger distance, and the valve plug 4 can be abutted on the fixing frame 511 and drive the first sliding cylinder to move downwards.
As shown in fig. 8, the bottom end of the wide tube 81 is provided with a sealing ring 811 coaxial therewith, the bottom end of the sealing ring 811 extends downward to form a screw cylinder 812, and the screw cylinder 812 is coaxially screw-coupled with the top end of the narrow tube 82.
By providing the seal ring 811 at the bottom end of the wide tube 81 such that the bottom end of the seal ring 811 extends downward to form the screw cylinder 812 screw-coupled with the narrow tube 82, the wide tube 81 and the narrow tube 82 can be sealingly coupled, so that the piston 83 can stably move downward when the pressure in the wide tube 81 increases.
As shown in fig. 8 and 11, two ring grooves are provided on the circumferential surface of the valve rod 3, the expansion valve further comprises a C-shaped ring 9 coaxially clamped in the ring grooves, and the piston 83 is located between the two C-shaped rings 9.
By disposing two C-rings 9 on the cushion of the valve stem 3 so as to fixedly dispose the piston 83 on the valve stem 3, the piston 83 can bring the valve stem 3 to move stably in the longitudinal direction.
As shown in fig. 7, the spacer 16 has a first mounting hole and a second mounting hole in the center from top to bottom, the first mounting hole has an inner diameter larger than that of the second mounting hole, the bottom end of the narrow tube 82 is screwed to the top end of the first mounting hole, the bottom end of the narrow tube 82 is provided with a positioning tube 821 extending downward, the second sliding tube has a sliding portion 711 sliding between the inner wall of the first mounting hole and the outer circumferential surface of the positioning tube 821, a buffer ring 73 sliding between the inner wall of the second mounting hole and the circumferential surface of the valve rod 3, and a connecting portion 712 connecting the sliding portion 711 and the buffer ring 73, and the second elastic member 72 is disposed between the sliding portion 711 and the bottom end of the narrow tube 82.
By providing the first and second mounting openings on the spacer 16, the narrow tube 82 is conveniently coaxially disposed in the first mounting opening, while the sliding portion 711 of the second sliding tube can slide in the first mounting opening, and the connecting portion 712 can drive the buffer ring 73 to stably slide in the second mounting opening, thereby preventing the second sliding tube from being separated from the spacer 16, so that the buffer ring 73 buffers the refrigeration frame in the connecting tube 6.
The foregoing examples merely illustrate one or more embodiments of the invention, which are described in greater detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims (10)

1. The utility model provides an automotive air conditioner heating power expansion valve, includes valve body (1) that has inlet (11) and liquid outlet (12), and set up in power head (2) on valve body (1) top, and set up valve rod (3) in valve body (1) and be connected with power head (2) transmission, and set up valve plug (4) on valve rod (3), the valve chamber has been seted up in valve body (1), be provided with the valve opening that can communicate inlet (11) and liquid outlet (12) in the valve chamber, a serial communication port, still be provided with in the valve chamber and slide shutoff piece (5) that can communicate inlet (11) and liquid outlet (12), valve plug (4) can with shutoff piece (5) looks butt, the aperture of shutoff piece (5) increases along with the increase of its sliding travel, under the operating condition, drive shutoff piece (5) and slide in order to communicate inlet (11) and liquid outlet (12) after valve opening (4) break away from the valve opening.
2. The thermal expansion valve of an automotive air conditioner according to claim 1, further comprising a connecting pipe (6) arranged in the valve chamber, wherein the bottom end of the connecting pipe (6) is closed, a valve hole is coaxially arranged at the bottom end of the connecting pipe (6), and a liquid passing hole (61) is formed in the connecting pipe (6); the plugging piece (5) comprises a first sliding cylinder and a first elastic element (52), the first sliding cylinder is coaxially arranged at the bottom end of the connecting pipe (6) in a sliding manner, the bottom end of the first sliding cylinder is connected with the bottom end of the valve chamber through the first elastic element (52), the top end of the first sliding cylinder is elastically abutted to the closed bottom end of the connecting pipe (6), a fixing frame (511) positioned at the bottom of the valve plug (4) is arranged in the first sliding cylinder, and in a working state, the valve plug (4) is abutted to the fixing frame (511) after being separated from the valve hole, and then drives the first sliding cylinder to move downwards.
3. An automotive air conditioning thermostatic expansion valve according to claim 2, characterized in that the expansion valve further comprises a liquid inlet tube (13), the liquid inlet tube (13) being coaxially screwed into the liquid inlet (11), the top end of the liquid inlet tube (13) being provided with a first docking cylinder (131) coaxial therewith, a sliding chamber being formed between the outer circumferential surface of the first docking cylinder (131) and the inner wall of the valve chamber, the outer diameter of the first docking cylinder (131) being smaller than the outer diameter of the liquid inlet tube (13), the first sliding cylinder having an abutment cylinder (512) coaxially slidingly arranged at the bottom end of the connecting tube (6), and a connecting ring (513) having an outer diameter larger than the abutment cylinder (512), the outer edge of the connecting ring (513) extending downwards to form a second docking cylinder (514), the second docking cylinder (514) sliding in the sliding chamber, the first elastic element (52) being arranged in the sliding chamber.
4. A thermostatic expansion valve for an automotive air conditioner according to claim 2 or 3, wherein said fixing frame (511) includes a suspension ring coaxially provided in said first sliding cylinder, and a connecting rod connecting between an outer circumferential surface of said suspension ring and an inner circumferential surface of said first sliding cylinder, the connecting rod extending obliquely upward from the inner circumferential surface of said first sliding cylinder.
5. An automotive air conditioning thermostatic expansion valve according to claim 2, characterized in that the valve body (1) comprises an upper valve block (14), a lower valve block (15) and a spacer block (16), the upper valve block (14) and the lower valve block (15) are connected from top to bottom, the spacer block (16) is arranged between the upper valve block (14) and the lower valve block (15), the spacer block (16) divides the valve chamber into an upper valve cavity in the upper valve block (14) and a lower valve cavity in the lower valve block (15), the power head (2) is connected with the upper valve cavity, the connecting pipe (6) is arranged at the bottom end of the spacer block (16), the bottom end of the inner circumferential surface of the connecting pipe (6) is provided with a stepped groove, the expansion valve further comprises a baffle (74) coaxially arranged in the stepped groove, the valve hole is positioned at the center position of the baffle (74), the valve plug (4) is arranged at the bottom end of the valve rod (3), and in an initial state, the valve plug (4) is larger than the bottom end of the valve hole (4) and abuts against the valve hole.
6. A thermostatic expansion valve for a motor vehicle air conditioner according to claim 5, wherein the spacer (16) is further provided with a seating groove at the bottom end thereof, the expansion valve further comprises a second sliding cylinder provided in the seating groove, and a second elastic member (72) provided at the top end of the second sliding cylinder and the top end of the seating groove, the bottom end of the second sliding cylinder has a buffer ring (73), and the valve rod (3) penetrates the buffer ring (73) and is slidably fitted thereto.
7. An automotive air conditioning thermostatic expansion valve according to claim 6, characterized in that a centrally arched diaphragm (21) is provided in the power head (2), a wide tube (81) is provided at the top end of the upper valve chamber, the top end of the wide tube (81) is connected with the diaphragm (21), a narrow tube (82) coaxial with the spacer (16) is provided at the top end of the wide tube (81) and communicated with the top end of the narrow tube (82), the valve rod (3) is coaxially slidingly provided in the narrow tube (82), the expansion valve further comprises a piston (83) and a third elastic element (84), the piston (83) is coaxially slidingly provided in the narrow tube (82), the top end of the valve rod (3) penetrates the piston (83) and is fixedly connected with the piston, and the third elastic element (84) is provided between the piston (83) and the spacer (16).
8. A thermostatic expansion valve for a motor vehicle air conditioner according to claim 7, wherein the bottom end of the wide tube (81) is provided with a sealing ring (811) coaxial therewith, the bottom end of the sealing ring (811) extends downward to form a screw cylinder (812), and the screw cylinder (812) is coaxially screwed with the top end of the narrow tube (82).
9. An automotive air conditioner thermal expansion valve according to claim 7 or 8, characterized in that the valve rod (3) is provided with two annular grooves on its circumferential surface, the expansion valve further comprises a C-shaped ring (9) coaxially clamped in the annular grooves, and the piston (83) is located between the two C-shaped rings (9).
10. The thermal expansion valve of an automobile air conditioner according to claim 7, wherein the spacer (16) has a first mounting hole and a second mounting hole in order from top to bottom at a center position, an inner diameter of the first mounting hole is larger than an inner diameter of the second mounting hole, a bottom end of the narrow tube (82) is screwed with a top end of the first mounting hole, a positioning tube (821) extending downward is provided at the bottom end of the narrow tube (82), the second sliding tube has a sliding portion (711) sliding between an inner wall of the first mounting hole and an outer circumferential surface of the positioning tube (821), a buffer ring (73) sliding between an inner wall of the second mounting hole and a circumferential surface of the valve rod (3), and a connecting portion (712) connecting the sliding portion (711) and the buffer ring (73), and the second elastic member (72) is provided between the sliding portion (711) and the bottom end of the narrow tube (82).
CN202310924132.2A 2023-07-26 2023-07-26 Thermal expansion valve of automobile air conditioner Withdrawn CN116877713A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310924132.2A CN116877713A (en) 2023-07-26 2023-07-26 Thermal expansion valve of automobile air conditioner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310924132.2A CN116877713A (en) 2023-07-26 2023-07-26 Thermal expansion valve of automobile air conditioner

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CN116877713A true CN116877713A (en) 2023-10-13

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118089285A (en) * 2024-04-29 2024-05-28 上海恒温控制器厂有限公司 Thermal expansion valve for air conditioner

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118089285A (en) * 2024-04-29 2024-05-28 上海恒温控制器厂有限公司 Thermal expansion valve for air conditioner

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