CN111720559B - Control valve and air conditioning system - Google Patents

Control valve and air conditioning system Download PDF

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Publication number
CN111720559B
CN111720559B CN201910212959.4A CN201910212959A CN111720559B CN 111720559 B CN111720559 B CN 111720559B CN 201910212959 A CN201910212959 A CN 201910212959A CN 111720559 B CN111720559 B CN 111720559B
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China
Prior art keywords
valve
wall
port
hole
communicated
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CN201910212959.4A
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CN111720559A (en
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不公告发明人
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Zhejiang Sanhua Automotive Components Co Ltd
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Zhejiang Sanhua Automotive Components Co Ltd
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    • 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
    • F16K1/14—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 with ball-shaped valve member
    • 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
    • F16K1/523—Means for additional adjustment of the rate of flow for limiting the maximum flow rate, using a stop
    • 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
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift 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)
  • Fluid Mechanics (AREA)
  • Valve Housings (AREA)

Abstract

The invention discloses a control valve, which comprises a valve body, wherein the valve body comprises a first port, a second port and a first valve hole, the valve body comprises a first channel, the first channel is communicated with the second port, the valve body comprises a first inner wall, the first inner wall is a wall part corresponding to the first channel, and the first valve hole is formed in the first inner wall; the valve body comprises a side cavity, the wall part corresponding to the side cavity at least comprises a first valve hole and a side hole, the second valve hole is communicated with the first channel, and the side hole is communicated with the first port; the second valve hole is communicated with the second port, the flow area of the second valve hole is smaller than the second port, and the second valve hole is larger than or equal to the side hole. The control valve has stable performance.

Description

Control valve and air conditioning system
Technical Field
The invention relates to the field of fluid control, in particular to a throttling component and a system.
Background
In a vehicle or household air conditioning system, an evaporator, a condenser, a compressor and a throttling component are required, and a general refrigerating system needs to be provided with the throttling component in front of the evaporator, and the flow direction of the throttling component is constant. Sometimes, in order to meet the system requirement, the flow direction of the local refrigerant in the system may be in a reverse direction, and at this time, a valve component needs to be additionally arranged, so that the number of pipelines in the system is large, and the number of parts is large.
Disclosure of Invention
The invention aims to provide a control valve which is good in performance stability.
In order to realize the purpose, the following technical scheme is adopted:
a control valve comprises a power element, a transmission rod, a valve core assembly and a valve body, wherein the valve body comprises a first port, a second port and a first valve hole, the power element drives the valve core assembly to act through the transmission rod,
the valve body comprises a first channel and a second channel, the first channel is communicated with the second port, the first channel is communicated with the first port, the valve body comprises an adjusting seat cavity, the valve core assembly is located in the adjusting seat cavity and acts, the valve core assembly is communicated with the first valve hole in a matched mode or is communicated with the adjusting seat cavity and the first channel in a stopping mode, the second channel is communicated with the adjusting seat cavity, and the height of the first port is lower than that of the second port in the longitudinal direction of the valve body;
the valve body comprises a side cavity, at least a second valve hole and a side hole are formed in the wall part of the valve body corresponding to the side cavity, the second valve hole is communicated with the first channel, and the side hole is communicated with the second channel; the side opening has the intercommunication drill way, the intercommunication drill way is located the side opening with the one end of second passageway intercommunication, the central line of intercommunication drill way with distance D1 between the valve body face that first port place is less than the central line of first valve hole with distance D2 between the valve body face that first port place.
An air conditioning system comprises a first heat exchanger, a second heat exchanger and the control valve according to the technical scheme, wherein the number of the control valves is at least two, the control valves are a first valve and a second valve, a first port of the first heat exchanger is communicated with a second port of the first valve, a first port of the first valve is communicated with a first port of the second valve, and a second port of the second valve is communicated with a first port of the second heat exchanger.
The valve body of the control valve in the technical scheme of the invention comprises a first channel and a second channel, wherein the first channel is communicated with the second port; the second channel is communicated with the first port, the valve body comprises a side cavity, at least a second valve hole and a side hole are formed in the wall portion of the valve body corresponding to the side cavity, the second valve hole is communicated with the first channel, the side hole is communicated with the second channel, the valve body comprises a regulating seat cavity, a valve core assembly is located in the regulating seat cavity, the valve core assembly acts, the valve core assembly is communicated with the first valve hole in a matched mode or is communicated with the regulating seat cavity and the first channel in a stopping mode, the second channel is communicated with the regulating seat cavity, and the height of the first port is lower than that of the second port in the longitudinal direction of the valve body; so, fluid can get into from first port, leave from the second port, or fluid can get into from the second port, after second valve hole bypass, leave from first port, realize the forward throttle, reverse bypass's effect, the control valve passes through the setup of side chamber, realize the forward throttle, in the effect of reverse bypass, compact in structure, the distance D1 between the central line of intercommunication drill way and the valve body face that first port place is less than the distance D2 between the central line of first valve hole and the valve body face that first port place in addition, so, the fluid that gets into from the second port, after second valve hole, the intercommunication drill way, leave from first port, the runner is smooth relatively, and the valve core subassembly has been avoided to most fluid that gets into from the second port, the performance stability of control valve is better.
Drawings
FIG. 1 is a schematic perspective view of one embodiment of a control valve of the present invention;
FIG. 2 is an exploded view of FIG. 1;
FIG. 3 is a side schematic view and a partial sectional schematic view taken along H-H of the valve body of FIG. 1;
FIG. 4 is another side view and a cross-sectional view taken along C-C of the valve body of FIG. 1;
FIG. 5 is an exploded view of the spool portion of FIG. 1;
FIG. 6 is a further side view and a cross-sectional view A-A of the valve body of FIG. 1;
FIG. 7 is a schematic cross-sectional view taken along line J-J of FIG. 4;
FIG. 8 is a perspective view of the valve body of FIG. 1;
FIG. 9 is a schematic flow diagram of fluid flow in accordance with an embodiment of the air conditioning system of the present invention;
FIG. 10 is a schematic view of another flow direction of fluid in an embodiment of the air conditioning system of the present invention.
Detailed Description
Referring to fig. 1 to 8, fig. 1 to 8 are schematic views of an embodiment of a control valve, and fig. 1 and 2 are schematic views illustrating a structure of a control valve 100, where the control valve 100 includes a power head assembly 10, a valve body 20, a transmission rod 30, a valve core assembly 40, an adjuster seat assembly 50, and a blocking member 90. From the valve body configuration illustrated in fig. 1, the control valve 100 may be an expansion valve with a shut-off feature, such as a thermostatic expansion valve, an electronic expansion valve, or other type of expansion valve.
The valve body 20 includes a first port 2011, a second port 2012, a third port 2013, a fourth port 2014, and a first valve bore 2015, wherein fluid may enter the first port 2011, exit the second port 2012 after passing through the first valve bore 2015, enter the third port 2013, and exit the fourth port 2014; fluid may also enter from the fourth port 2014, exit from the third port 2013, enter from the second port 2012, and exit from the first port 2011. The control valve may be used for bi-directional flow of fluid.
Taking the valve body structure illustrated in fig. 1 as an example, the valve body 20 includes a first side 2021, a second side 2022, a third side 2023, and a fourth side 2024, the first side 2021 is disposed opposite to the second side 2022, the first side 2021 is disposed with a first port 2011, the second side 2022 is disposed with a second port 2012, the third side 2023 is adjacent to the first side 2021, the third side 2023 is adjacent to the second side 2022, the fourth side 2024 is disposed opposite to the third side 2023, the fourth side 2024 is adjacent to the first side 2021, and the fourth side 2024 is adjacent to the second side 2022.
The valve body 20 includes a first channel 2051, the first channel 2051 communicates with the second port 2012, a wall portion corresponding to the first channel 2051 includes a first inner wall 205, and the valve body 20 opens a first valve hole 2015 on the first inner wall 205.
The valve body 20 includes a second passage 208, the second passage 208 communicates with the first port 2011, and the valve body 20 includes a second inner wall 209, and the second inner wall 209 is a portion of a wall corresponding to the second passage 208.
The valve body 20 includes a side cavity 203, an opening side of the side cavity 203 is located at the third side 2023, the valve body 20 at least has a second valve hole 2041c and a side hole 2041b opened on a wall 204 corresponding to the side cavity 203, the second valve hole 2041c is communicated with the second port 2012, the second valve hole 2041c is communicated with the first passage 2051, and the side hole 2041b is communicated with the first port 2011. Therefore, after the fluid enters the second port, the fluid passes through the first channel, and because the first valve hole is closed, the fluid continues to flow along the first channel, passes through the second valve hole and then leaves from the first port, and because the fluid enters the fluid flow channel from the second port smoothly, the pressure drop is relatively low.
The wall 204 corresponding to the side cavity 203 has a bottom wall 2041 and a side wall 2042, the bottom wall 2041 is opposite to the opening side of the side cavity 203, the valve body 20 is provided with a second valve hole 2041c and a side hole 2041b in the bottom wall 2041, the second valve hole 2041c is a linear hole, the second valve hole 2041c is orthogonal to the bottom wall 2041, the side hole 2041b is a linear hole, and the side hole 2041b is orthogonal to the bottom wall 2041.
The center line of the second valve hole 20a is parallel to or coincides with the center direction, and the center line of the side hole 2041b is parallel to or coincides with the center direction, with the center axis of the side cavity 203 as the center direction. Thus, the second valve hole 2041c and the side hole 2041b can be easily processed.
It should be noted that the opening side of the side cavity 203 may be located at other side portions, the second valve hole 2041c may be opened at the side wall 2042, and the opening directions of the second valve hole and the side hole may not be parallel to the center line direction.
Of course, as other implementation modes, the valve body includes a second valve hole and a side hole, the second valve hole with the diapire quadrature sets up, the valve body is in the lateral wall is seted up the side hole, the side hole with the diapire angulation sets up.
In other embodiments, the valve body may be provided with other holes, for example, in addition to the second valve hole 2041c and the side hole 2041b, and the other holes may communicate with the first port 2011.
In this embodiment, the maximum restriction area of the control valve is 3-19.6mm 2 The flow area of the first valve hole is smaller than that of the second port, the flow area of the first valve hole is not smaller than the throttling area, the first valve hole is larger than or equal to the side hole, the first inner wall 205 comprises a first wall part 2052 and a second wall part 2053, the valve body 20 is provided with the first valve hole 2015 on the first wall part 2052, the wall part corresponding to the second valve hole comprises a third wall part 2054, the second wall part 2053 connects the first wall part 2052 and the third wall part 2054, the inner diameter of the third wall part 2054 is smaller than that of the second wall part 2053, and as the third wall part 2054 and the second wall part 2053 form an angle, a certain resistance can be caused when fluid passes through the second wall part to form a channel and enters the third wall part 2054 to form a channel, so as to reduce the inner diameter caused by the channel setting to a certain extent, the inner diameter of the second wall part is set to be larger than that of the third wall part. As used herein, the restriction area refers to the area of fit between the valve core assembly and the first valve bore, and isThe actual flow restriction area of the fluid is not limited to the area of the first valve bore. The first valve bore flow area refers to the orifice fluid flow area of the first valve bore.
In the longitudinal direction z of the valve body, the first port is lower in height than the second port; the side hole 2041b is communicated with the second passage; the side hole 2041b has a communication orifice 2091, the communication orifice 2091 is located at one end of the side hole 2041b communicating with the second passage, and a distance D1 between a centerline of the communication orifice 2091 and a valve body face where the first port is located is smaller than a distance D2 between the centerline of the first valve hole and the valve body face where the first port is located. Thus, as fluid enters the valve body from the second port 2012, the fluid flushes the seal between the valve core and the second valve bore, enters the side chamber, then enters the second passage 208 from the side bore via the communication orifice 2091, and then the fluid exits the control valve from the first port, so that the fluid path exiting the first port is relatively unobstructed and the pressure drop is relatively low due to the entry of fluid from the second port.
The valve body 20 includes an adjusting seat cavity 206, at least a portion of the adjusting seat assembly 50 is located in the adjusting seat cavity 206, the spool assembly is located in the adjusting seat cavity 206, the second channel 208 is communicated with the adjusting seat cavity 206, after the spool assembly is driven by the transmission rod to act, the spool assembly is matched with the first valve hole and then can be communicated or is stopped to be communicated with the adjusting seat cavity and the first channel, and the communication hole 2091 is located between the adjusting seat cavity 206 and the first port 2011. Therefore, the fluid entering from the second port and flowing out from the communicating hole avoids the adjusting seat cavity and the part structure in the adjusting seat cavity, and the pressure drop is relatively small. The communication aperture 2091 may be located partially in the regulator seat cavity 206 or completely in the regulator seat cavity, but out of the way of the cartridge assembly.
In the longitudinal direction z of the valve body 20, at least part of the second wall 2053 corresponds to the second inner wall 209, that is, a projection of at least part of the second wall 2053 in the longitudinal direction of the valve body 20 will fall on the second inner wall 209, a projection of the second inner wall 209 in the longitudinal direction of the valve body 20 will also fall on the second wall 2053, and the inner diameter of the second wall 2053 is smaller than that of the first wall 2052, which helps to ensure the thickness of the wall part of the valve body at the position of the second wall 2053 opposite to the second inner wall 209, and helps to stabilize the valve body.
The adjusting seat assembly 50 includes a base 501, an elastic member 502, and a vibration-proof member 503, and an outer wall of the base 501 is fixed to a wall portion corresponding to the adjusting seat cavity 206, for example, by screwing. The base 501 comprises an inner cavity, most of the elastic piece 502 is located in the inner cavity, one end of the elastic piece 502 abuts against the base 501, and part of the anti-vibration component 503 is sleeved outside part of the structure of the valve core assembly.
Further, the bottom wall 2041 includes a boss 2041a, the valve body 20 is provided with a second valve hole 2041c on the boss 2041a, and the boss 2041a is provided to cooperate with the stopping component 90, so as to seal the second valve hole 2041 c.
The stopping component 90 includes a valve core portion 60 and a base portion 70, the valve core portion 60 is disposed corresponding to the second valve hole 2041c, the valve core portion 60 is larger than the second valve hole 2041c, the base portion 70 is disposed in a limiting manner with the valve core portion 60, and the base portion 70 is fixed with the valve body 20.
The valve core portion 60 includes a flap 601 and a bracket 602, the wall portion 204 corresponding to the side cavity 203 has an annular wall 2043 corresponding to the second valve hole 2041c, the flap 601 has a rigidity smaller than that of the annular wall 2043, and the flap 601 is larger than the second valve hole 2041 c. For example, the baffle 601 may be made of nylon, resin, rubber, etc., the valve body 20 may be made of metal, such as aluminum alloy or stainless steel, etc., and the annular wall 2043 may also be made of metal, such as aluminum alloy or stainless steel, etc. When the valve body 20 is made of a non-metal material, such as plastic, the baffle 601 may be made of nylon, resin, rubber, or the like, the annular wall 2043 may be integrally provided with the plastic valve body, and the annular wall 2043 may also be made of metal, such as aluminum alloy or stainless steel. The sealing at the second valve hole 2041c is facilitated by the close contact of the two materials different in rigidity.
The bracket 602 comprises a head part 6021 and a long diameter part 6026, the baffle plate 601 is accommodated in a space surrounded by the head part 6021, the vertical projection of the head part 6021 on the bottom wall 2041 covers the second valve hole 2041c, the head part 6021 is arranged opposite to the wall part corresponding to the side cavity 203, the head part 6021 is provided with an arc-shaped section 6023, and at least part of the arc-shaped section 6023 is abutted against the baffle plate 601. The head portion 6021 may be made of metal, and the arc-shaped portion 6023 limits the periphery of the blocking piece 601 to prevent the blocking piece 601 from falling off.
The arc-shaped section 6023 has a base section 6023a and an extension section 6023b, at least a portion of the base section 6023a is disposed against the baffle plate 601, the extension section 6023b is disposed on a side of the baffle plate 601 not contacting with the support part 6025, the extension section 6023b is adjacent to a wall portion (i.e., the bottom wall 2041) of the second valve hole 2041C relative to the base section 6023a, the extension section 6023b extends out of the baffle plate 601, at least a portion of the extension section 6023b vertically projects from the baffle plate 601 in the axial direction C of the valve core 60, and the minimum inner diameter of the extension section 6023b is smaller than the outer diameter of the baffle plate 601, so that the arc-shaped section 6023 can effectively fix the baffle plate 601 through the base section 6023a and the extension section 6023b, thereby facilitating the non-displacement of the baffle plate 601 and facilitating the sealing of the baffle plate 601. The axial direction of the valve core portion 60 may also be a direction from the opening of the side cavity to the bottom wall of the side cavity, that is, a machining direction of the side cavity.
The bottom wall 2041 comprises a boss 2041a, the boss 2041a is provided with a second valve hole 2041c, and the distance between the baffle plate 601 and the arc-shaped section 6023 is less than the protruding height of the boss 2041 a. The distance between the blocking plate 601 and the arc-shaped section 6023 is especially the maximum distance between the blocking plate 601 and the arc-shaped section 6023, so that when the blocking plate 601 is relatively matched with the boss 2041a, the sealing performance between the blocking plate 601 and the boss 2041a can be ensured to a certain extent.
Specifically, the vertical projection of the extension segment 6023b in the direction toward the boss 2041a falls outside the boss 2041a, and the height of the boss 2041a protruding from the bottom wall 2041 is greater than the distance between the baffle 601 and the extension segment 6023b, especially the maximum distance between the baffle 601 and the extension segment 6023 b. Therefore, the baffle plate 601 and the boss 2041a can be tightly matched, and the sealing performance is ensured.
Furthermore, the plane size of the baffle plate 601 is larger than the boss 2041a, the bottom wall is provided with the second valve hole and the side hole, and the projection of the baffle plate on the bottom wall does not completely cover the side hole, so that on one hand, the plane size of the baffle plate 601 can greatly improve the sealing property between the baffle plate and the boss, on the other hand, the projection of the baffle plate on the bottom wall cannot completely cover the side hole, the stability of the valve core part when fluid flows from the first port to the second port is further improved, and the stability of the throttling function performance of the poppet valve is realized.
The head part 6021 comprises a supporting part 6025, the blocking piece 601 is arranged in contact with the supporting part 6025, and the blocking piece 601 and the supporting part 6025 are arranged in a limiting way, so that when the stopping part is assembled, the position of the blocking piece 601 is fixed, the blocking piece 601 accurately covers the second valve hole 2041c, and convenience and accuracy in assembly are facilitated. The support portion 6025 has an opening 6027, the baffle 601 has a projection 6011, and the projection 6011 extends into the opening 6027 to help ensure that the baffle 601 is accurately positioned when secured to the support portion 6025.
The base part 70 comprises an elastic part 701 and a base 702, the base 702 comprises a groove 7021, the center line of the groove 7021 is parallel to or coincided with the center line of the second valve hole, the center line of the groove 7021 is parallel to or coincided with the center line of the side cavity, at least part of the elastic part 701 is located in the groove 7021, at least part of the elastic part 701 is limited with the valve core part 60, and the base 702 is fixedly arranged with the valve body 20. Thus, when the stop member is assembled with the valve body 20, the elastic member 701 and the base 702 are disposed in a limited manner, and the valve core portion 60 and the elastic member 701 are disposed in a limited manner, so that, when the stop member is assembled, the stop member can be more accurately mounted in the side cavity of the valve body 20, the positioning of the valve core portion 60 is more accurate, and the stop member also helps to maintain the integrity of the peripheral wall portion of the second valve hole 2041c to a certain extent.
Specifically, at least a part of the elastic member 701 abuts against the support portion 6025, and at least a part of the elastic member 701 abuts against the base 702; at least part of the elastic part 701 is positioned in the space surrounded by the long diameter part 6026, the long diameter part 6026 is sleeved outside the elastic part 701, a small gap is arranged between the outer wall of the long diameter part 6026 and the side wall 7025 of the groove 7021, the gap between the outer wall of the long diameter part 6026 and the side wall 7025 of the groove 7021 is 0.2mm-0.9mm, the gap between the outer wall of the long diameter part 6026 and the side wall 7025 of the groove 7021 is far smaller than the depth of the long diameter part 6026 extending into the groove 7021, and the long diameter part 6026 and the side wall 7025 of the groove 7021 can be arranged in a guiding way to help stabilize the movement of the valve core part 60. The gap between the outer wall of the long diameter portion 6026 and the side wall 7025 of the groove 7021 is at least 3 times less than the depth of the long diameter portion 6026 extending into the groove 7021.
More specifically, the long diameter portion 6026 is hollow, at least a part of the elastic member 701 is accommodated in the long diameter portion 6026, and the elastic member 701 and the long diameter portion 6026 are disposed with a small gap, taking the center of the base 702 as a center line, the valve core 60 is inclined at an angle a of 0-15 ° with respect to the center line, the outer diameter of the long diameter portion 6026 is larger than the diameter of the stopper 601, and the outer diameter of the long diameter portion 6026 is larger than the diameter of the second valve hole 2041 c. Because the outer wall of the long diameter part 6026 and the side wall 7025 of the groove 7021 are arranged in a small clearance manner, and the elastic part 701 and the long diameter part 6026 are arranged in a small clearance manner, the limit of the long diameter part 6026 and the base 702 is relatively accurate, and particularly, the inclination angle a of the valve core part 60 relative to the central line is 0-15 degrees, so that when the stop component 90 is assembled, the valve core part 60 is not easy to deflect due to the limit effect of the elastic part 701 and the base 702, the assembly is easier, the stability of the valve core part 60 can be improved, and the abrasion of the valve core part of the wall part around the second valve hole is reduced to a certain extent.
The head 6021 has a ledge 6028, the perpendicular projection of the ledge 6028 from the base 702 falls outside the groove 7021, the head 6021 having an outer diameter that is greater in size than the inner diameter of the groove 7021; when the head 6021 moves in the direction of the groove 7021, the lugs 6028 always extend outside the side wall 7025 of the groove 7021, thereby facilitating smooth movement of the head 6021 and improving sealing performance.
The head portion 6021 includes a support surface 6025a, the support surface 6025a surrounds the arc-shaped section 6023, the support surface 6025a extends outward from the root of the arc-shaped section 6023, the support surface 6025a can provide a limiting point for riveting, if the support surface 6025a is not provided, the riveting distance of the riveting tool needs to be set by a machine used for the riveting tool, so that the riveting distance is constant, which has a high precision requirement for the riveting tool because the valve core portion 60 has a smaller structure, and the valve core portion 60 is arranged to cooperate with the second valve hole 2041c, which can be used for sealing the second valve hole 2041 c.
The base portion 70 includes a threaded segment 7023, the threaded segment 7023 is threadably coupled to the side wall 2042 of the side cavity, the base 702 includes a slot 7021, and at least a portion of the resilient member 701 is disposed in the slot 7021. The base part 70 is connected with the valve body through threads, so that the connection is convenient and the assembly is simple; in addition, because the valve core part and the base part have certain limiting effect, in the assembling process of the base part and the valve body, the sealing between the valve core part and the second valve hole is easy to realize and the assembling is easy.
The operating principle of the control valve 100 is: when the control valve is required to realize a throttling function, high-pressure fluid enters from the first port 2011, the power head assembly 10 drives the transmission rod 30, the transmission rod 30 drives the valve core assembly 40 to move in the axial direction of the valve body, the size of the first valve hole is adjusted, the fluid enters a first channel after being throttled and then leaves from the second port 2012, at the moment, when the valve core part 60 covers the second valve hole 2041c, the spring is in a compression state, the side cavity 203 is not communicated with the first port 2011 and the second port 2012, the third port 2013 enters low-pressure fluid, the power head assembly 10 senses the temperature and pressure of the low-pressure fluid, the size of the first valve hole is adjusted, and the low-pressure fluid leaves from the fourth port 2014; when the control valve is required to realize the function of one-way conduction, high-pressure fluid enters from the fourth port 2014, the power head assembly 10 senses the temperature and the pressure of the high-pressure fluid, the power head assembly 10 drives the transmission rod to move upwards to close the first valve hole, the high-pressure fluid leaves from the third port 2013, then the high-pressure fluid enters from the second port 2012, passes through the first channel, enters the side cavity 203 at the second valve hole 2041c, then leaves from the second channel and the first port 2011, at the moment, the valve core part 60 is far away from the second valve hole 2041c, the spring is in a compression state, the side cavity 203 is communicated with the first port 2011 and the second port 2012, and the control valve realizes the function of large-flow conduction because the first valve hole is always in a closed state.
The above-mentioned control valves can be used in an air conditioning system, which may be a heat pump system, referring to fig. 9 and 10, the air conditioning system 500 includes a first heat exchanger 80, a second heat exchanger 81, a compressor 82, a fluid switching device 83, and a control valve 100, the number of the control valves 100 is two, the control valve 100 is defined as a first valve 100a and a second valve 100b, the fluid switching device 83 has a first port 83a, a second port 83b, a third port 83c, and a fourth port 83d, the first heat exchanger 80 has a first port 80b and a second port 80a communicated with each other, the second heat exchanger 81 has a first port 81b and a second port 81a communicated with each other, the first port 82a of the compressor 82 communicates with the second port 83b of the fluid switching device 83, the third port 83c of the fluid switching device 83 communicates with the fourth port 2014 of the first valve 100a, the third port 2013 of the first valve 100a communicates with the second port 80a of the first valve 80, the first port 80b of the first heat exchanger 80 communicates with the second port 2012 of the first valve 100a, the first port 2011 of the first valve 100a communicates with the first port 2011 of the second valve 100b, the second port 2012 of the second valve 100b communicates with the first port 81b of the second heat exchanger 81, the second port 81a of the second heat exchanger 81 communicates with the third port 2013 of the second valve 100b, the fourth port 2014 of the second valve 100b communicates with the first port 83a of the fluid switching device 83, and the fourth port 83d of the fluid switching device 83 communicates with the second port 82b of the compressor 82.
When the second heat exchanger 81 is used as an evaporator and the first heat exchanger 80 is used as a condenser, the second port 83b of the fluid switching device 83 communicates with the third port 83c of the fluid switching device 83, and the first port 83a of the fluid switching device 83 communicates with the fourth port 83d of the fluid switching device 83.
When the first heat exchanger 80 is used as an evaporator and the second heat exchanger 81 is used as a condenser, the first port 83a of the fluid switching device 83 communicates with the second port 83b of the fluid switching device 83, and the third port 83c of the fluid switching device 83 communicates with the fourth port 83d of the fluid switching device 83.
It should be noted that the air conditioning system 500 illustrates only two control valves 100, but the air conditioning system may have not only two control valves 100 but also a plurality of control valves. Fig. 9 and 10 illustrate only the control valve 100, but the control valve 200, the control valve 300, and other embodiments are also applicable to the air conditioning system.
It should be noted that: although the present invention has been described in detail with reference to the above embodiments, those skilled in the art will appreciate that various combinations, modifications and equivalents of the present invention can be made by those skilled in the art, and all technical solutions and modifications thereof without departing from the spirit and scope of the present invention are encompassed by the claims of the present invention.

Claims (11)

1. The utility model provides a control valve, includes power component, transfer line, case subassembly and valve body, the valve body includes first port, second port and first valve hole, power component passes through the transfer line drives the action of case subassembly, its characterized in that:
the valve body comprises a first channel and a second channel, the first channel is communicated with the second port, the first channel is communicated with the first port, the valve body comprises an adjusting seat cavity, the valve core assembly is located in the adjusting seat cavity and acts, the valve core assembly is communicated with the first valve hole in a matched mode or is communicated with the adjusting seat cavity and the first channel in a stopping mode, the second channel is communicated with the adjusting seat cavity, and the height of the first port is lower than that of the second port in the longitudinal direction of the valve body;
the valve body comprises a side cavity, at least a second valve hole and a side hole are formed in the wall part of the valve body corresponding to the side cavity, the second valve hole is communicated with the first channel, and the side hole is communicated with the second channel; the side opening has the intercommunication drill way, the intercommunication drill way is located the side opening with the one end of second passageway intercommunication, the central line of intercommunication drill way with distance D1 between the valve body face that first port place is less than the central line of first valve hole with distance D2 between the valve body face that first port place.
2. The control valve of claim 1, wherein: the maximum throttle area of the control valve is 3-19.6mm 2 And the flow area of the second valve hole is smaller than the second port, the flow area of the second valve hole is not smaller than the throttle area, and the second valve hole is larger than or equal to the side hole.
3. The control valve of claim 2, wherein: the communication orifice is located at a position between the regulation seat cavity and the first port.
4. The control valve of claim 1, wherein: the communication orifice is located at a position between the regulation seat cavity and the first port.
5. The control valve according to any one of claims 1 to 4, wherein: the wall portion that first passageway corresponds includes first inner wall, first inner wall includes first wall, second wall, the valve body is in first wall sets up first valve opening, the wall portion that the second valve opening corresponds includes the third wall, the second wall is connected first wall with the third wall, the internal diameter of third wall is less than the second wall.
6. The control valve of claim 5, wherein: the wall part corresponding to the second channel comprises a second inner wall, at least part of the second wall is projected on the second inner wall in the longitudinal direction of the valve body, the projection of the second inner wall in the longitudinal direction of the valve body is projected on the second wall, and the inner diameter of the second wall is smaller than that of the first wall.
7. The control valve of claim 1, wherein: the wall portion that the side chamber corresponds includes the diapire, the valve body is in the diapire sets up the second valve opening with the side opening, the second valve opening is located the middle part position of diapire, the valve body is in the wall portion that the side chamber corresponds still is provided with other holes, other holes with first port intercommunication.
8. The control valve of claim 1, wherein: the control valve is provided with a valve core part, a spring and a base part, the valve core part is positioned in the side cavity, the valve core part and the second valve hole are correspondingly arranged, the valve core part is larger than the second valve hole, the base part and the valve core part are limited, and the base part and the valve body are fixedly arranged;
when the valve core part covers the second valve hole, the spring is in a compressed state, and the side cavity is closed to communicate the first port and the second port;
when the valve core part is far away from the second valve hole, the spring is in a compressed state, and the side cavity is communicated with the first port and the second port.
9. The control valve of claim 1, wherein: the maximum throttle area of the control valve is 3-19.6mm 2 The flow area of the second valve hole is smaller than the second port, the flow area of the second valve hole is not smaller than the throttle area, and the second valve hole is larger than or equal to the side hole;
the communication orifice is located at a position between the regulation seat cavity and the first port;
the wall part corresponding to the first channel comprises a first inner wall, the first inner wall comprises a first wall and a second wall, the valve body is provided with the first valve hole on the first wall, the wall part corresponding to the second valve hole comprises a third wall, the second wall is connected with the first wall and the third wall, and the inner diameter of the third wall is smaller than that of the second wall; the wall part corresponding to the second channel comprises a second inner wall, in the longitudinal direction of the valve body, the projection of at least part of the second wall in the longitudinal direction of the valve body falls on the second inner wall, the projection of the second inner wall in the longitudinal direction of the valve body falls on the second wall, and the inner diameter of the second wall is smaller than that of the first wall;
the wall part corresponding to the side cavity comprises a bottom wall, the valve body is provided with the second valve hole and the side hole in the bottom wall, the second valve hole is positioned in the middle of the bottom wall, the wall part corresponding to the side cavity of the valve body is also provided with other holes, and the other holes are communicated with the first port;
the control valve is provided with a valve core part, a spring and a base part, the valve core part is positioned in the side cavity, the valve core part and the second valve hole are correspondingly arranged, the valve core part is larger than the second valve hole, the base part and the valve core part are limited, and the base part and the valve body are fixedly arranged;
when the valve core part covers the second valve hole, the spring is in a compressed state, and the side cavity is closed to communicate the first port and the second port;
when the valve core part is far away from the second valve hole, the spring is in a compressed state, and the side cavity is communicated with the first port and the second port.
10. An air conditioning system comprising a first heat exchanger, a second heat exchanger and a control valve according to any one of claims 1 to 9, the control valve being at least two, the control valve being a first valve and a second valve, the first port of the first heat exchanger being in communication with the second port of the first valve, the first port of the first valve being in communication with the first port of the second valve, the second port of the second valve being in communication with the first port of the second heat exchanger.
11. The air conditioning system of claim 10, wherein: the air conditioning system further comprises a compressor and a fluid switching device, the fluid switching device is provided with a first interface, a second interface, a third interface and a fourth interface, the first interface of the compressor is communicated with the second interface of the fluid switching device, the third interface of the fluid switching device is communicated with the third port of the first valve, the third port of the first valve is communicated with the second interface of the first heat exchanger, the second interface of the second heat exchanger is communicated with the third port of the second valve, the fourth port of the second valve is communicated with the first interface of the fluid switching device, and the fourth interface of the fluid switching device is communicated with the second interface of the compressor; the first interface of the fluid switching device is communicated with the second interface of the fluid switching device, the third interface of the fluid switching device is communicated with the fourth interface of the fluid switching device, the first heat exchanger is used as an evaporator, and the second heat exchanger is used as a condenser; or the second interface of the fluid switching device is communicated with the third interface of the fluid switching device, the first interface of the fluid switching device is communicated with the fourth interface of the fluid switching device, the second heat exchanger is used as an evaporator, and the first heat exchanger is used as a condenser.
CN201910212959.4A 2019-03-20 2019-03-20 Control valve and air conditioning system Active CN111720559B (en)

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CN1273352A (en) * 1999-05-11 2000-11-15 株式会社不二工机 Expansion valve
CN102620492A (en) * 2011-01-31 2012-08-01 株式会社不二工机 Expansion valve
JP2012197990A (en) * 2011-03-22 2012-10-18 Fuji Koki Corp Expansion valve
CN103363735A (en) * 2012-04-05 2013-10-23 株式会社不二工机 Expansion valve
CN103375951A (en) * 2012-04-28 2013-10-30 浙江三花股份有限公司 Thermostatic expansion valve with unilateral control function
CN105465407A (en) * 2014-09-12 2016-04-06 浙江三花汽车零部件有限公司 Thermostatic expansion valve and manufacturing method thereof

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Publication number Priority date Publication date Assignee Title
JPH11325660A (en) * 1998-03-18 1999-11-26 Fujikoki Corp Expansion valve

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1273352A (en) * 1999-05-11 2000-11-15 株式会社不二工机 Expansion valve
CN102620492A (en) * 2011-01-31 2012-08-01 株式会社不二工机 Expansion valve
JP2012197990A (en) * 2011-03-22 2012-10-18 Fuji Koki Corp Expansion valve
CN103363735A (en) * 2012-04-05 2013-10-23 株式会社不二工机 Expansion valve
CN103375951A (en) * 2012-04-28 2013-10-30 浙江三花股份有限公司 Thermostatic expansion valve with unilateral control function
CN105465407A (en) * 2014-09-12 2016-04-06 浙江三花汽车零部件有限公司 Thermostatic expansion valve and manufacturing method thereof

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