JP2019532232A - Control valve and air conditioning system - Google Patents

Abstract

This control valve solves the problem that it is difficult to maintain the coaxiality of a drive gear and an execution gear. The control valve includes a valve seat (10) provided with a normally open valve port and a plurality of switching valve ports, a sleeve assembly externally attached to the valve seat (10), and the valve seat ( 10), a slider (20) for controlling opening and closing switching of the plurality of switching valve ports, and provided between the valve seat (10) and the sleeve assembly, and a bottom end of the valve seat ( 10), a central axis (30) on which the slider (20) is rotatably extrapolated, and a rotor member (40) extrapolated on the central axis (30) and including a drive gear (41), An execution gear (50) that is extrapolated to the central shaft (30) and rotationally drives the slider (20), and is provided between the drive gear (41) and the execution gear (50). (41) and a transmission gear meshed with both the execution gear (50). [Selection] Figure 3

Description

  The present invention relates to the field of valves, and more specifically to a control valve and an air conditioning system.

  The electric three-way valve is mainly applied to an air conditioning system, and is composed of both a valve body and a coil, and the valve body has three valve openings. The operating principle is that the magnetic rotor member rotates in a clockwise or counterclockwise direction by applying a circumferential electromagnetic driving force to the magnetic rotor member in the valve body by the action of a current pulse. Can do. In the valve body, the driving force is transmitted to the slider by gear transmission, so that the opening and closing of the two valve openings in the valve seat and the switching of the refrigerant flow path of the air conditioning system can be realized.

  Patent Document 1 discloses an electric three-way valve. As shown in FIGS. 1 and 2, the electric three-way valve is also driven by the coil field to rotate the rotor member. In the electric three-way valve, the drive gear 41 ′ is pushed into the lower end portion of the rotor shaft 2 ′ of the rotor member so as to be integrally formed, and the rotor shaft 2 ′ rotates in synchronization with the drive gear 41 ′. , Gear the reduction gear. The drive gear 41 'and the reduction gear 90' constitute a first class gear pair. The reduction gear 90 'is a stepped gear including one large diameter gear and one small diameter gear provided coaxially. The large-diameter gear is engaged with the drive gear 41 ′, the small-diameter gear is engaged with the execution gear 50 ′, and interlocked to rotate the execution gear 50 ′. The execution gear 50 ′ rotates the slider 20 ′ by the transmission pin. The slider 20 ′ closes one of the two switching valve ports, thereby switching the flow direction of the refrigerant.

Chinese Patent Application No. 10337575606

  Gear transmission has high demands on the center distance and parallelism between both gears. The electric three-way valve employs a configuration in which the magnetic rotor member and the execution gear 50 'are not coaxial. The magnetic rotor member has one rotor shaft, and a driving gear 41 ′ is welded to the lower end of the rotor shaft. The central position of the driving gear 41 ′ is two sleeves, an upper end cap 4 ′ and a lower end cap 5 ′. Kept by. The center position of the execution gear 50 'is maintained by the valve seat 10'. The coaxiality of the drive gear and the execution gear is maintained by the valve seat, large sleeve, small sleeve, upper end cap, lower end cap, and rotor shaft, and the coaxiality is the accuracy of assembly of the small sleeve, end cap, and large sleeve. Therefore, it is difficult to ensure the coaxiality, the valve opening failure of the valve body due to the poor coaxiality is likely to occur, the assembly process is many and difficult, and the demand for the processing accuracy of the members is high.

  An object of the present invention is to provide a control valve and an air conditioning system in order to solve the problem that it is difficult to ensure the coaxiality of a drive gear and an execution gear in the prior art.

  In order to achieve the above object, according to one aspect of the present invention, a control valve is provided, and the control valve is provided with a normally open valve port and a plurality of switching valve ports, and is extrapolated to the valve seat. Provided between the valve seat and the sleeve assembly, and a bottom end fixed to the valve seat. A central shaft on which the slider is rotatably extrapolated, a rotor member extrapolated on the central axis and including a drive gear, an execution gear extrapolated on the central axis and rotationally driving the slider, a drive gear and an execution gear And a transmission gear meshed with both the drive gear and the execution gear.

  Further, the sleeve assembly includes a first sleeve and a second sleeve connected to each other, the first sleeve is extrapolated to the valve seat, and the magnetic body portion of the rotor member is accommodated in the second sleeve.

  Furthermore, the top of the second sleeve has a positioning hole in which the tip of the central shaft is accommodated.

  Further, the slider is provided with a first mounting hole, the slider is extrapolated to the central axis by the first mounting hole, the driving gear is provided with the second mounting hole, and the driving gear is centered by the second mounting hole. The execution gear is provided with a third mounting hole, and the execution gear is extrapolated to the central shaft through the third mounting hole.

  Further, the rotor member further includes a rod part and a magnetic part that is extrapolated outside the rod part, the drive gear is provided at the bottom part of the rod part, the rod part is provided with a fourth mounting hole, and the rod part is It is extrapolated to the central axis by the fourth mounting hole.

  Further, the rod part and the drive gear are injection molded members connected to the magnetic part by injection molding, or the drive gear is a metal member, and the rod part is an injection molded member that connects the magnetic part and the drive gear. is there.

  Further, an elastic member is further provided on the upper portion of the rotor member, and the elastic member applies a downward elastic force to the rotor member.

  Furthermore, a housing hole for housing the elastic member is provided in the upper part of the rotor member, a first bush is provided between the hole wall of the housing hole and the central axis, and both ends of the elastic member are respectively first. It abuts against the end of the bush and the end wall of the receiving hole.

  Further, a second bush is provided between the drive gear and the execution gear.

  Further, the transmission gear is attached to the valve seat by a gear shaft.

  Further, the control valve further includes a backing plate provided in the sleeve assembly, the backing plate has a withdrawal hole for retracting the drive gear, and the tip of the gear shaft is connected to the backing plate.

  According to another aspect of the present invention, an air conditioning system including the control valve is provided.

  In the technical solution to which the present invention is applied, the control valve includes a valve seat, a sleeve assembly, a slider, a central shaft, a rotor member, an execution gear, and a transmission gear. The valve seat is provided with a normally open valve port and a plurality of switching valve ports, and the sleeve assembly is extrapolated to the valve seat. The slider is rotatably provided on the valve seat, and is used for controlling opening / closing switching of the plurality of switching valve ports. The central shaft is provided between the valve seat and the sleeve assembly, and its bottom end is fixed to the valve seat. The center shaft is provided with a slider, an execution gear, and a drive gear in order from the bottom to the top, and a rotor member is drilled. The drive gear in the rotor member transmits the rotational power of the rotor member to the execution gear by the transmission gear, the execution gear is driven to rotate the slider, and the slider is opened and closed in the plane of the valve seat end. Is realized. In this way, the drive gear is rotated by the rotor member so as to rotate the transmission gear meshed therewith, and the transmission gear is further interlocked so as to rotate the execution gear meshed therewith, On the plane of the valve seat end, the slider can realize opening / closing switching of the switching valve port. Since the lower end of the central shaft is fixed to the center of the valve seat and both the drive gear and the execution gear are drilled, the coaxiality between the drive gear and the execution gear is ensured. At the same time, the process is simplified and the production cost of the control valve is reduced.

The drawings in the specification, which form a part of this application, are used to provide a further understanding of the invention, and the exemplary embodiments of the invention and the description thereof do not constitute fraudulent limitations on the invention, It is for interpreting this invention. In the drawing
It is a cross-sectional schematic diagram of the electric three-way valve in a prior art. FIG. 2 is a schematic configuration diagram of a rotor member of the electric three-way valve in FIG. 1. It is a cross-sectional schematic diagram of the Example of the control valve by this invention. It is a cross-sectional schematic diagram of the local structure of the control valve of FIG. It is a cross-sectional schematic diagram of the rotor member of the control valve of FIG.

  If there is no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other. In the following, the present invention will be described in detail with reference to the drawings and in combination with embodiments.

  FIG. 3 shows a schematic cross-sectional view of an embodiment of a control valve according to the present invention. As shown in FIG. 3, the control valve of the present embodiment includes a valve seat 10, a sleeve assembly, a slider 20, a central shaft 30, a rotor member 40, an execution gear 50, and a transmission gear. The valve seat 10 is provided with a normally open valve port and a plurality of switching valve ports, and the sleeve assembly is extrapolated to the valve seat 10. The slider 20 is rotatably provided on the valve seat 10 and is used for controlling opening / closing switching of a plurality of switching valve ports. The central shaft 30 is provided between the valve seat 10 and the sleeve assembly, and its bottom end is fixed to the valve seat 10. The slider 30, the execution gear 50, and the drive gear 41 are attached to the central shaft 30 in order from the bottom to the top, and the rotor member 40 is drilled. The drive gear 41 in the rotor member 40 is a transmission gear, and transmits the rotational power of the rotor member 40 to the execution gear 50. The execution gear 50 rotates the slider 20 and the slider 20 is in the plane of the end face of the valve seat 10. Realizes valve opening / closing switching. In this embodiment, the number of switching valve ports is two.

  In the technical solution to which the present embodiment is applied, the drive gear 41 is rotated in conjunction with the rotor member 40 so as to rotate the transmission gear meshed therewith, and the transmission gear is further meshed therewith. The execution gear 50 is interlocked so as to rotate, and the slider 20 rotates in the plane of the valve seat 10 to realize switching of the switching valve port. The lower end of the central shaft 30 is fixed to the center of the valve seat 10, and both the drive gear 41 and the execution gear 50 are drilled, that is, the gear shaft of the drive gear 41 and the execution gear 50 is the central shaft 30, and the drive The coaxiality between the gear 41 and the execution gear 50 is maintained. At the same time, the process is simplified and the production cost of control valves is reduced.

  In the prior art, the rotor and the rotor shaft are positioned by the upper and lower end caps and rotate together. In the rotation process, the frictional noise between the rotor shaft and the end cap is large, and the positioning length between the end cap and the shaft. When it is short and operated for a long time, the wear between the shaft and the hole increases. In this embodiment, the central shaft 30 does not rotate, the length of the engagement between the central hole of the rotor and the central shaft 30 is long, and even when operated for a long time, the wear between the shaft and the hole is small. Longer product life. Preferably, the central shaft 30 employs a metal material. Preferably, the rotor member 40 is made of a high-polymer material such as wear-resistant nylon or PPS having self-lubricating properties and is injection-molded. Since the friction is small when rotating so that the plastic center hole of the rotor member 40 and the center shaft 30 are engaged, the reliability of the control valve is higher and the operation noise is lower.

  In this embodiment, the gear shaft of the execution gear 50 and the rotor member are the same shaft, and the lower end cap in the prior art is eliminated, so that the number of members is reduced and the process is simplified. The cost of the control valve is lower.

  FIG. 4 shows a schematic cross-sectional view of the local configuration of the control valve of FIG. As shown in FIGS. 3 and 4, in this embodiment, the sleeve assembly includes a first sleeve 61 and a second sleeve 62 connected to each other, and the first sleeve 61 is extrapolated to the valve seat 10, and the rotor member 40. The magnetic part 43 is accommodated in the second sleeve 62. The configuration is easy to work and mold and the control valve is easily assembled.

  As shown in FIG. 3, in this embodiment, the top of the second sleeve 62 has a positioning hole, and the tip of the central shaft 30 is accommodated in the positioning hole. By the positioning hole, the positioning with respect to the upper end of the central shaft 30 becomes more reliable, and the positioning with respect to both ends of the central shaft 30 becomes more reliable. Preferably, the positioning hole is a concave non-through hole.

  In this embodiment, the slider 20 is provided with a first mounting hole, the slider 20 is extrapolated to the central shaft 30 through the first mounting hole, the drive gear 41 is provided with a second mounting hole, and the drive gear 41 is The second attachment hole is extrapolated to the central shaft 30, the execution gear 50 is provided with a third attachment hole, and the execution gear 50 is extrapolated to the central shaft 30 through the third attachment hole. The slider 20, the execution gear 50, and the drive gear 41 are externally attached to the central shaft 30 through first to third mounting holes, respectively. The engagement method is simple and easily realized. At the same time, the above configuration ensures the coaxiality between the execution gear 50 and the drive gear 41.

  FIG. 5 shows a schematic cross-sectional view of the rotor member of the control valve of FIG. As shown in FIG. 5, in this embodiment, the rotor member 40 further includes a rod portion 42 and a magnetic body portion 43 that is extrapolated outside the rod portion 42, and the drive gear 41 is provided at the bottom portion of the rod portion 42. The part 42 is provided with a fourth mounting hole, and the rod part 42 is extrapolated to the central shaft 30 through the fourth mounting hole. With the above-described configuration, the rotor member 40 can be easily processed and molded, the configuration becomes compact, and the strength can be maintained. The coil of the control valve applies a circumferential electromagnetic driving force to the magnetic body portion 43 by the action of the current pulse. The magnetic body 43 transmits power to the drive gear 41 by interlocking the drive gear 41 so as to rotate together.

  In this embodiment, the rod portion 42 and the drive gear 41 are injection molded members that are connected to the magnetic body portion 43 by injection. Preferably, the drive gear 41 can employ a polymer material such as nylon or PPS. Or in embodiment which is not illustrated, a drive gear is a metal member, and a rod part is an injection molding member which injects and connects a magnetic part and a drive gear.

  As shown in FIGS. 3 and 4, in this embodiment, an elastic member is further provided on the upper portion of the rotor member 40, and the elastic member applies a downward elastic force to the rotor member 40. The rotor member 40 abuts downward by the action of the elastic force of the elastic member. The elastic member can keep the rotor member 40 from popping up. Preferably, the elastic member is a spring.

  As shown in FIG. 3, in the present embodiment, a housing hole for housing the elastic member is provided in the upper portion of the rotor member 40, and the first bush 71 is provided between the hole wall of the housing hole and the central shaft 30. The both ends of the elastic member are in contact with the end portion of the first bush 71 and the end wall of the receiving hole, respectively. The accommodation hole is used to place the first bush 71 and the elastic member. The upper end surface of the first bush 71 is in contact with the inner end wall of the second sleeve 62 and the lower end surface is in contact with the upper end of the elastic member. .

  Specifically, the first bush 71 maintains the state in which the lower end surface of the rotor member 40 is in contact with the second bush 72 by the action of elastic force by compressing the elastic member so as to have a fixed size. Similarly, the slider 20 can be brought into contact with the sealing surface of the valve seat 10 by the action of elastic force.

  As shown in FIG. 3, in the present embodiment, a second bush 72 is provided between the drive gear 41 and the execution gear 50. The second bush 72 is used for partitioning the drive gear 41 and the execution gear 50 and prevents them from interfering with each other. At the same time, the second bush 72 can fix the drive gear 41 at a constant height so that the drive gear 41 is just engaged with the transmission gear and does not interfere with other gears.

  As shown in FIGS. 3 and 4, in this embodiment, the transmission gear is attached to the valve seat 10 by a gear shaft. The transmission gear includes one or a plurality of reduction gears, thereby realizing a reduction function. In this embodiment, the transmission gear includes two reduction gears, both of which are stepped gears, and the stepped gear includes one large diameter gear and one small diameter gear provided coaxially. The large-diameter gear of the first reduction gear is meshed with the drive gear 41, the small-diameter gear is meshed with the large-diameter gear of the second reduction gear, and the small-diameter gear of the second reduction gear is meshed with the execution gear 50. The gear 50 is interlocked to rotate, the execution gear 50 is interlocked to rotate the slider 20 by the transmission pin, and the slider 20 blocks one of the two switching valve ports. Change the direction of refrigerant flow. The two reduction gears are not coaxial with the execution gear 50 and the drive gear 41, and are each attached to the valve seat 10 by a gear shaft.

  In this embodiment, the inter-axis distances between the central shaft 30 and all the gear shafts are all positioned by the positioning holes in the valve seat 10. Since the positioning holes are machined into the same plane and the accuracy of the position is high, both the inter-axis distance and the axial parallelism are maintained, and the productivity of the product is improved.

  As shown in FIG. 4, in this embodiment, the control valve further includes a backing plate 80 provided in the sleeve assembly, the backing plate 80 has a retraction hole to avoid the drive gear 41, and the tip of the gear shaft is the backing. Connected to the plate 80. The backing plate 80 is used to position the tip of the gear shaft so as to prevent the gear shaft from being tilted in the transmission process. The backing plate 80 is preferably connected to the valve seat 10 by a connecting column.

  The present application further provides an air conditioning system, an embodiment of the air conditioning system including the control valve described above. The control valve maintains the coaxiality of the drive gear and the execution gear, and at the same time simplifies the process and reduces the production cost of the control valve. Furthermore, the production cost of the air conditioning system is reduced.

  As can be seen from the above description, the embodiments described in the present invention achieve the following technical effects.

  The drive gear of the control valve of the present application is rotated by the rotor member and interlocked to rotate the transmission gear meshed therewith, and the transmission gear is further interlocked to rotate the execution gear meshed therewith. The switching valve opening / closing switching in which the slider is in the plane of the end face of the valve seat can be realized. Since the lower end of the central shaft is fixed to the center of the valve seat and the drive gear and the execution gear are drilled together, the coaxiality between the drive gear and the execution gear can be maintained. At the same time, the process is simplified and the production cost of control valves is reduced. The control valve of the present application has advantages such as good product manufacturability, lower cost, higher certainty, and lower noise of valve body operation.

  It should be noted that the terminology used herein is not intended to be limiting to the embodiments of the present application, but is merely for describing specific embodiments. Unless specifically stated in the specification, terms used herein include both singular and plural forms. In addition, in this specification, the terms “include” and / or “include” indicate that a feature, step, operation, device, assembly, and / or combination thereof exists.

  The foregoing is not a limitation to the present invention, but is only a preferred embodiment of the present invention, and for those skilled in the art, the present invention can have various modifications and changes. Any amendments, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

2 '... rotor shaft 4' ... upper end cap 5 '... lower end cap 10' ... valve seat 20 '... slider 41' ... drive gear 50 '... execution gear 90 '... reduction gear 10 ... valve seat 20 ... slider 30 ... central shaft 40 ... rotor member 41 ... drive gear 42 ... rod part 43 ... magnetic body part 50 ..Execution gear 61 ... first sleeve 62 ... second sleeve 71 ... first bush 72 ... second bush 80 ... backing plate

Claims (12)

A control valve,
A valve seat (10) provided with a normally open valve port and a plurality of switching valve ports;
A sleeve assembly extrapolated to the valve seat (10);
A slider (20) rotatably provided on the valve seat (10) for controlling opening and closing of the plurality of switching valve ports;
A central shaft (30) provided between the valve seat (10) and the sleeve assembly, with a bottom end fixed to the valve seat (10), and the slider (20) being rotatably inserted;
A rotor member (40) extrapolated to the central shaft (30) and including a drive gear (41);
An execution gear (50) that is extrapolated to the central shaft (30) and rotationally drives the slider (20);
A transmission gear provided between the drive gear (41) and the execution gear (50) and meshed with both the drive gear (41) and the execution gear (50);
A control valve comprising:   The sleeve assembly includes a first sleeve (61) and a second sleeve (62) connected to each other. The first sleeve (61) is extrapolated to the valve seat (10), and the rotor member (40) 2. The control valve according to claim 1, wherein the magnetic part (43) is accommodated in the second sleeve (62).   The control valve according to claim 2, wherein the top of the second sleeve (62) has a positioning hole in which a tip of the central shaft (30) is accommodated. The slider (20) is provided with a first mounting hole, and the slider (20) is extrapolated to the central axis (30) through the first mounting hole,
The drive gear (41) is provided with a second mounting hole, and the drive gear (41) is extrapolated to the central shaft (30) through the second mounting hole,
The execution gear (50) is provided with a third mounting hole, and the execution gear (50) is extrapolated to the central shaft (30) through the third mounting hole. Control valve as described in. The rotor member (40) further includes a rod part (42) and a magnetic part (43) extrapolated to the rod part (42),
The drive gear (41) is provided at the bottom of the rod portion (42),
The rod portion (42) is provided with a fourth mounting hole, and the rod portion (42) is extrapolated to the central shaft (30) through the fourth mounting hole. The control valve described. The rod portion (42) and the drive gear (41) are injection molded members connected to the magnetic body portion (43) by injection,
Alternatively, the drive gear (41) is a metal member, and the rod portion (42) is an injection-molded member that injection-connects the magnetic body portion (43) and the drive gear (41). The control valve according to claim 5.   The control valve according to claim 5, wherein an elastic member is further provided on an upper portion of the rotor member (40), and the elastic member applies a downward elastic force to the rotor member (40).   An accommodation hole for accommodating the elastic member is provided in an upper portion of the rotor member (40), and a first bush (71) is provided between the hole wall of the accommodation hole and the central shaft (30). 8. The control valve according to claim 7, wherein both ends of the elastic member are in contact with an end of the first bush (71) and an end wall of the receiving hole, respectively.   The control valve according to claim 1, wherein a second bush (72) is provided between the drive gear (41) and the execution gear (50).   The control valve according to claim 1, wherein the transmission gear is attached to the valve seat by a gear shaft. The control valve further includes a backing plate (80) provided in the sleeve assembly;
11. The backing plate (80) has a retraction hole for avoiding the drive gear (41), and the tip of the gear shaft is connected to the backing plate (80). Control valve.   It is an air conditioning system, Comprising: The air conditioning system characterized by including the control valve as described in any one of Claims 1-11.