JP6850359B2 - Electronic expansion valve and freezing system equipped with it - Google Patents

Description

The present invention relates to the field of a refrigeration system, and specifically to an electronic expansion valve and a refrigeration system including the electronic expansion valve.

As shown in FIG. 1, in the background technology, the deceleration type electronic expansion valve for modulation air conditioning mainly includes a valve body portion for adjusting the flow rate and a coil portion for driving. The coil portion includes a permanent magnet type stepping motor 1, a three-stage deceleration gear reducer 2, and a screw pair configuration 5 that converts the rotary motion of the motor into the vertical motion of the screw 3, and the valve body is the valve seat 10'. And a core member such as a corrugated tube 7 that controls the valve needle 8 to move up and down. The following introduces the operating principle of the electronic expansion valve, that is, first, the electronic controller of the air conditioning system controls the output shaft of the stepping motor 1 of the electronic expansion valve to rotate, and the motor 1 and the gear reducer 2 are connected. By cooperating, the output shaft of the gear reducer 2 is rotated, the output shaft of the gear reducer 2 and the screw cooperate to rotate the screw, and the screw and the screw pair configuration 5 cooperate with each other. , Move the screw up and down. A steel ball 11'is welded to the tip of the screw, a bush 6 is provided at the lower end of the steel ball 11', and a valve needle 8 is connected to the lower end of the bush 6. When the screw is driven to move downward by the driving member, the screw is abutted on the steel ball 11', the steel ball 11'is abutted on the bush 6, and the bush 6 is abutted on the valve needle 8. As a result, the valve needle 8 and the screw move downward in synchronization so that the valve needle 8 reaches the closed position, that is, the position where the valve needle 8 comes into contact with the valve body 10'. When the valve needle 8 is in the closed position, the corrugated tube 7 is subsequently pulled. When a reverse pulse is applied, the screw 3 moves upward, and the valve needle 8 constantly moves upward due to the return elasticity of the corrugated tube 7 and the pressure action of the system, thereby changing the degree of opening of the valve opening 9. It serves the purpose of controlling the degree of superheat of the flow rate regulation by changing the flow area.

However, when the electronic expansion valve is actually operating, the welding point between the circuit board 12'and the lead wire 13'is close to the stepping motor 1 and the insulation distance is short, so that a lightning strike may occur ( The lightning strike phenomenon may be a phenomenon caused by being struck by lightning, or a phenomenon caused by an arc generated between the circuit board 12'and the stepping motor 1 when a large voltage is applied instantaneously), control. The system is interfered with and an erroneous operation phenomenon appears.

An object of the present invention is to provide an electronic expansion valve and a refrigeration system including the electronic expansion valve for solving the problem that a lightning strike may occur in the electronic expansion valve in the prior art.

In order to achieve the above object, according to the first aspect of the present invention, an electronic expansion valve is provided, and the valve body, the valve needle movably provided in the valve body, and the valve needle are driven to move. The drive unit is located at the connection point between the control unit and the lead wire, and the control unit that controls the operation of the drive unit by being electrically connected to an external device via the lead wire. It has a first insulating configuration that separates the drive unit.

Further, the first insulating configuration is a first insulating lid, the control unit includes a control plate connected to a lead wire, and the first insulating lid is provided on the side close to the drive unit of the control plate.

Further, a first accommodating concave groove for accommodating the control plate is provided on the side of the first insulating lid facing the control plate.

Further, a second accommodating concave groove for accommodating the lead wire is further provided on the side of the first insulating lid facing the control plate, and the second accommodating concave groove is located on one side of the first accommodating concave groove. It communicates with the first accommodating groove.

Further, the electronic expansion valve further includes a drive unit housing arranged to cover the outside of the drive unit and the control unit, and a second insulating configuration located between the control unit and the inner wall of the drive unit housing.

Further, the first insulating configuration is a first insulating lid, the second insulating configuration is a second insulating lid, the control unit includes a control plate connected to a lead wire, and the first insulating lid is a driving unit in the control plate. The second insulating lid is provided on the side close to the drive unit of the control plate.

Further, a third accommodating recess for accommodating the control plate is provided on the side of the second insulating lid facing the control plate.

Further, a fourth accommodating concave groove for accommodating the lead wire is further provided on the side of the second insulating lid facing the control plate, and the fourth accommodating concave groove is located on one side of the third accommodating concave groove. 3 Communicate with the accommodating recess.

Further, the first insulating lid and the second insulating lid are engaged with each other so as to cover the outside of the control plate.

Further, the height of the first insulating lid is equal to or higher than the height of the second insulating lid.

Further, the electronic expansion valve further includes a transmission mechanism accommodating box connected to the drive housing and having an escape hole for the lead wire to escape, and when the first insulating lid and the second insulating lid are engaged, the inside of the escape hole is provided. To close.

Further, the escape hole is a stepped hole, a first boss is provided in the middle of the first insulating lid, a second boss is provided in the middle of the second insulating lid, and the first insulating lid and the second insulating lid are provided. When engaged with, the first boss and the second boss form a platform that engages with the stepped surface of the stepped hole.

Further, the first insulation configuration and the second insulation configuration are an integral configuration.

According to the second aspect of the present invention, there is provided a refrigeration system including the electronic expansion valve.

According to the third aspect of the present invention, an electronic expansion valve is provided via a valve body, a valve needle movably provided in the valve body, a drive unit for moving the valve needle, and a lead wire. It is located between the control unit that controls to operate the drive unit by being electrically connected to an external device, and the control unit and the drive unit, and the connection point between the control unit and the lead wire and the drive unit. Includes a first insulating configuration that separates.

According to the fourth aspect of the present invention, there is provided a refrigeration system including the electronic expansion valve.

According to the technical proposal of the present invention, the electronic expansion valve includes a first insulation configuration located between the connection point between the control unit and the lead wire and the drive unit. In the above configuration, by providing the first insulation configuration between the connection point between the control unit and the lead wire and the drive unit, the insulation distance is increased, the probability of a lightning strike phenomenon is reduced, and the refrigeration system It reduces the probability of erroneous operation and solves the problem that the electronic expansion valve in the prior art may have a lightning strike.

The drawings of the specification that form part of this application are used to provide a further understanding of the invention, and the exemplary examples of the invention and their description do not constitute an unreasonable limitation to the invention. Used to interpret the present invention.
It is a vertical cross-sectional configuration schematic diagram of the electronic expansion valve in the prior art. It is a vertical cross-sectional composition schematic diagram of the Example of the electronic expansion valve by this invention. It is a local three-dimensional composition schematic diagram of the electronic expansion valve of FIG. FIG. 3 is a schematic view of the local vertical cross-sectional configuration of the electronic expansion valve of FIG. It is a three-dimensional configuration schematic diagram of the first insulation structure of the electronic expansion valve of FIG. It is a three-dimensional configuration schematic diagram of the second insulation structure of the electronic expansion valve of FIG. It is a three-dimensional configuration schematic diagram in which a control plate, a lead wire and a terminal of an electronic expansion valve of FIG. 2 are engaged. It is a three-dimensional configuration schematic diagram in which the control plate, the lead wire, and the terminal of the electronic expansion valve of FIG. 2 are engaged with the first insulating configuration. It is a three-dimensional configuration schematic diagram in which the control plate, the lead wire, the first insulation configuration and the second insulation configuration of the electronic expansion valve of FIG. 2 are engaged.

It is necessary to explain that the examples of the present application and the features in the examples may be combined with each other when there is no conflict. Hereinafter, the present invention will be described in detail with reference to the drawings and combining examples.

As shown in FIGS. 2 to 4, the electronic expansion valve of the first embodiment includes a valve body 10, a valve needle 20, a drive unit 30, a control unit 40, and a first insulation configuration 60. The valve needle 20 is movably provided in the valve body 10, the drive unit 30 drives the valve needle 20 to move, and the control unit 40 is electrically connected to an external device via the lead wire 50. The drive unit 30 is controlled to operate, and the first insulation configuration 60 is located between the control unit 40 and the drive unit 30, and separates the connection point between the control unit 40 and the lead wire 50 from the drive unit 30.

It is necessary to explain that the "connection point" described in the specification refers to a connection part between the control unit 40 and the lead wire 50 and a region in the vicinity of the part.

According to the technical proposal of the first embodiment, the electronic expansion valve includes a first insulation configuration 60 located between the connection point between the control unit 40 and the lead wire 50 and the drive unit 30. In the above configuration, the first insulation configuration 60 is provided between the connection point between the control unit 40 and the lead wire 50 and the drive unit 30, so that the insulation distance is increased and the probability of a lightning strike phenomenon is reduced. Further, the probability of erroneous operation of the refrigeration system is reduced, and the problem that the electronic expansion valve in the prior art may cause a lightning strike is solved.

In a more specific embodiment, the first insulating configuration 60 is located at the connection point between the control unit 40 and the lead wire 50, and separates the connection point and the drive unit 30.

It is necessary to explain that, as shown in FIGS. 2 to 4, in the first embodiment, the control unit 40 includes a control plate connected to the lead wire 50, and the lead wire 50 is connected to the drive unit 30 of the control plate. Welded to adjacent surfaces. Since there is a welding point having a certain height in welding, the distance between the highest point of the welding point protrusion and the drive unit 30 may be smaller than a predetermined insulation distance, and a lightning strike phenomenon occurs. Therefore, it is necessary to additionally arrange the first insulation configuration 60 so as to increase the insulation distance.

As shown in FIGS. 3 to 5, in the first embodiment, the first insulating configuration 60 is the first insulating lid, the control unit 40 includes a control plate connected to the lead wire 50, and the first insulating lid controls. It is provided on the side of the plate close to the drive unit 30. The configuration covers the area of the control plate having the weld point, further reducing the probability of a lightning strike. In addition, the configuration is simple, facilitating processing and assembly.

As shown in FIG. 4, in the first embodiment, the electronic expansion valve further includes a drive housing 100. The drive unit housing 100 is arranged so as to cover the outside of the drive unit 30 and the control unit 40. The configuration prevents external air, dust, water vapor, etc. from coming into contact with the control unit 40, and guarantees the life of the control unit. Since the metal structure is also present on the surface of the control panel away from the drive unit 30, there is a risk that a lightning strike may occur between the control panel and the drive unit housing 100. In order to further reduce the occurrence of lightning strikes, the electronic expansion valve further includes a second insulation configuration 70 in this embodiment, as shown in FIG. The second insulating configuration 70 is located between the control unit 40 and the inner wall of the drive unit housing 100. The configuration increases the insulation distance between the metal configuration in the control unit and the drive unit housing 100, and reduces the probability that a lightning strike will occur.

As shown in FIG. 6, in the first embodiment, the second insulating configuration 70 is a second insulating lid, and the second insulating lid is provided on the side away from the drive unit 30 of the control panel. The configuration covers a region of the control panel that has a metallic configuration, further reducing the probability of a lightning strike. In addition, the configuration is simple, facilitating processing and assembly.

As shown in FIGS. 4 and 9, in the first embodiment, the electronic expansion valve further includes a transmission mechanism accommodating box 80 connected to the drive housing 100. The transmission mechanism accommodating box 80 has an escape hole through which the lead wire 50 escapes. The transmission mechanism accommodation is in the transmission mechanism accommodation box 80. Specifically, as shown in FIG. 4, the drive unit housing 100 is arranged so as to cover the upper part of the transmission mechanism accommodating box 80, and the escape hole penetrates the upper surface and the lower surface of the transmission mechanism accommodating box 80, and the lead wire 50. Is penetrated into the escape hole and is welded to the control plate located in the drive unit housing 100. Since the drive unit housing 100 does not completely wrap the transmission mechanism accommodating box 80, external air, dust, water vapor, etc. enter from one end of the escape hole away from the drive unit housing 100 and come into contact with the control plate to contact the control plate. The life may be shortened. In order to solve the above problem, in this embodiment, when the first insulating lid and the second insulating lid are engaged, the inside of the escape hole is closed. The configuration reduces the probability that external air, dust, water vapor, etc. will come into contact with the control panel.

As shown in FIGS. 5, 6 and 9, in the first embodiment, the escape hole is a stepped hole, the first boss 91 is provided in the middle of the first insulating lid, and the middle of the second insulating lid is provided. Is provided with a second boss 92, and when the first insulating lid and the second insulating lid are engaged, the lower surface of the first boss 91 and the second boss 92 is engaged with the stepped surface of the stepped hole. Form platform 90. The configuration is simple, further reducing the probability of external air, dust, water vapor, etc. coming into contact with the control panel.

As shown in FIG. 5, in the first embodiment, a first accommodating groove 61 for accommodating the control plate is provided on the side of the first insulating lid facing the control plate. The configuration is simple and the assembly is convenient.

As shown in FIG. 6, in the first embodiment, a third accommodating groove 71 for accommodating the control plate is provided on the side of the second insulating lid facing the control plate. When the first insulating lid and the second insulating lid are engaged, the first accommodating groove 61 and the third accommodating groove 71 form an accommodating space for accommodating the control plate, and the control plate is the first. It is wrapped between the insulating lid and the second insulating lid. The configuration is simple and the assembly is convenient.

As shown in FIG. 5, in the first embodiment, a second accommodating recess 62 for accommodating the lead wire 50 is further provided on the side of the first insulating lid facing the control plate, and the second accommodating groove 62 is provided. It is located on one side of the first accommodating recess 61 and communicates with the first accommodating recess 61. The configuration positions the lead wire 50 to prevent misalignment of the lead wire 50.

As shown in FIG. 6, in the first embodiment, a fourth accommodating groove 72 for accommodating the lead wire 50 is further provided on the side of the second insulating lid facing the control plate, and the fourth accommodating groove 72 is provided. It is located on the side of the third accommodating groove 71 close to the valve needle 20 and communicates with the third accommodating groove 71. The configuration further positions the lead wire 50 to prevent misalignment of the lead wire 50.

As shown in FIG. 9, in the first embodiment, when the first insulating lid and the second insulating lid are engaged, the hole formed by the second accommodating concave groove 62 and the fourth accommodating concave groove 72 is the lead wire 50. Adapts to the outer surface of. The configuration further reduces the probability that external air, dust, water vapor, etc. will come into contact with the control panel.

As shown in FIG. 9, in the first embodiment, the first insulating configuration 60 is the first insulating lid, and the first insulating lid and the second insulating lid are engaged with each other so as to cover the outside of the control plate. .. The configuration further reduces the probability of a lightning strike.

As shown in FIGS. 3, 4 and 9, in the first embodiment, the height of the first insulating lid is equal to or higher than the height of the second insulating lid. Since the position of the welding point between the control plate and the lead wire is high, the height of the first insulating lid must be increased so as to cover the welding point. Of course, as those skilled in the art will appreciate, the height of the second insulating lid may be greater than or equal to the height of the first insulating lid, the second insulating lid shields the metal configuration in the control plate, or other insulating sleeve. By cooperating with, the metal structure is shielded and the probability of a lightning strike is reduced.

In Example 1, the first insulating lid and the second insulating lid are formed from an insulating non-metallic material. Preferably, in the first embodiment, the first insulating lid and the second insulating lid are formed of a soft insulating material, and the first insulating lid and the second insulating lid are tightly connected to each other. More preferably, the first insulating lid and the second insulating lid are formed of a rubber material. Of course, as can be understood by those skilled in the art, the connection method between the first insulating lid and the second insulating lid is not limited to this, and may be further connected by a method such as engagement or insertion connection.

The following introduces the mounting steps,
1. First, one end of the lead wire 50 is welded to the control plate, and then the other end of the lead wire 50 is connected to the terminal 110 to form the configuration of FIG. 7.
2. The control plate is mounted in the first accommodating recess 61 of the first insulating lid, and the lead wire 50 at the lower part of the control plate is mounted in the second accommodating recess 62 to form the configuration of FIG.
3. The first insulating lid and the second insulating lid are engaged with each other to form the configuration shown in FIG.

The difference between the electronic expansion valve of the second embodiment (not shown) and the electronic expansion valve of the first embodiment is that the first insulation configuration 60 and the second insulation configuration 70 are integrally configured. Specifically, when the first insulating configuration 60 and the second insulating configuration 70 form one insulating sleeve and are attached, first, one end of the lead wire 50 is welded to the control plate, and then the lead wire 50 is attached. Is penetrated into the second accommodating recess 62 and the fourth accommodating recess 72 in the insulating sleeve. Finally, the other end of the lead wire 50 is connected to the terminal 110.

The present application further provides a refrigeration system, and examples of the refrigeration system (not shown) according to the present application include the electronic expansion valve. Since the electronic expansion valve has an advantage that a lightning strike phenomenon is unlikely to occur, a refrigeration system including the electronic expansion valve also has the above-mentioned advantage.

The above is not limited to the present invention, but is only a preferred embodiment of the present invention, and for those skilled in the art, the present invention may have various changes and changes. Any amendments, equivalent replacements, improvements, etc. made within the spirit and principles of the invention fall within the scope of the invention.

10 ... Valve body;
20 ... Valve needle;
30 ... Drive unit;
40 ... Control unit;
50 ... Lead wire;
60 ... First insulation configuration;
61 ... 1st accommodating groove;
62 ... Second accommodating groove;
70 ... Second insulation configuration;
71 ・ ・ ・ Third accommodating groove;
72 ... 4th accommodating groove;
80 ... Transmission mechanism storage box;
90 ... Platform;
91 ... 1st boss;
92 ... 2nd boss;
100 ... Drive housing;
110 ・ ・ ・ Terminal.

Claims (24)

It is an electronic expansion valve
Valve body (10) and
A valve needle (20) movably provided in the valve body (10),
A drive unit (30) that drives the valve needle (20) to move,
A control unit (40) that controls the drive unit (30) to operate by being electrically connected to an external device via a lead wire (50).
Located in connecting portion between the control unit (40) and said lead wire (50), seen including a first insulating structure (60) of separating said connecting portion and said driving portion (30),
The first insulating configuration (60) is a first insulating lid, the control unit (40) includes a control plate connected to the lead wire (50), and the first insulating lid is the drive in the control plate. It is provided on the side close to the part (30) and is provided.
An electronic expansion valve characterized in that a first accommodating groove (61) for accommodating the control plate is provided on the side of the first insulating lid facing the control plate. A second accommodating recess (62) for accommodating the lead wire (50) is further provided on the side of the first insulating lid facing the control plate, and the second accommodating recess (62) is the first. The electronic expansion valve according to claim 1 , wherein the electronic expansion valve is located on one side of the accommodation recessed groove (61) and communicates with the first accommodation recessed groove (61). The electronic expansion valve further
A drive unit housing (100) arranged so as to cover the outside of the drive unit (30) and the control unit (40), and a drive unit housing (100).
The electronic expansion valve according to claim 1, further comprising a second insulating configuration (70) located between the control unit (40) and the inner wall of the drive unit housing (100). Before Stories second insulating structure (70) is a second insulating cover, to claim 3 before Symbol second insulating cover is characterized in that it is provided on the side remote from the drive unit in the control plate (30) The electronic expansion valve described. The electronic expansion valve according to claim 4 , wherein a third accommodating groove (71) for accommodating the control plate is provided on the side of the second insulating lid facing the control plate. A fourth accommodating recess (72) for accommodating the lead wire (50) is further provided on the side of the second insulating lid facing the control plate, and the fourth accommodating recess (72) is the second. 3. The electronic expansion valve according to claim 5 , which is located on one side of the accommodating recess (71) and communicates with the third accommodating groove (71). The electronic expansion valve according to claim 4 , wherein the first insulating lid and the second insulating lid are engaged with each other so as to cover the outside of the control plate. The electronic expansion valve according to claim 4 , wherein the height of the first insulating lid is equal to or higher than the height of the second insulating lid. The electronic expansion valve further includes a transmission mechanism accommodating box (80) connected to the drive housing (100) and having an escape hole for the lead wire (50) to escape, the first insulating lid and the second insulating. The electronic expansion valve according to claim 4 , wherein when the lid is engaged, the inside of the escape hole is closed. The escape hole is a stepped hole, and a first boss (91) is provided in the middle of the first insulating lid, and a second boss (92) is provided in the middle of the second insulating lid. Platform (90) in which the first boss (91) and the second boss (92) are engaged with the stepped surface of the stepped hole when the first insulating lid and the second insulating lid are engaged. The electronic expansion valve according to claim 9 , wherein the electronic expansion valve is formed. The electronic expansion valve according to claim 3 , wherein the first insulating structure (60) and the second insulating structure (70) are integrally formed. A refrigeration system including an electronic expansion valve, wherein the electronic expansion valve is the electronic expansion valve according to any one of claims 1 to 11. It is an electronic expansion valve
Valve body (10) and
A valve needle (20) movably provided in the valve body (10),
A drive unit (30) that drives the valve needle (20) to move,
A control unit (40) that controls the drive unit (30) to operate by being electrically connected to an external device via a lead wire (50).
A first insulation that is located between the control unit (40) and the drive unit (30) and separates the connection point between the control unit (40) and the lead wire (50) from the drive unit (30). configuration and (60) only contains,
The first insulating configuration (60) is a first insulating lid, the control unit (40) includes a control plate connected to the lead wire (50), and the first insulating lid is the drive in the control plate. It is provided on the side close to the part (30) and is provided.
An electronic expansion valve characterized in that a first accommodating groove (61) for accommodating the control plate is provided on the side of the first insulating lid facing the control plate. A second accommodating recess (62) for accommodating the lead wire (50) is further provided on the side of the first insulating lid facing the control plate, and the second accommodating recess (62) is the first. The electronic expansion valve according to claim 13 , wherein the electronic expansion valve is located on one side of the accommodation recessed groove (61) and communicates with the first accommodation recessed groove (61). The electronic expansion valve further
A drive unit housing (100) arranged so as to cover the outside of the drive unit (30) and the control unit (40), and a drive unit housing (100).
13. The electronic expansion valve according to claim 13 , further comprising a second insulating configuration (70) located between the control unit (40) and the inner wall of the drive unit housing (100). Before Stories second insulating structure (70) is a second insulating cover, to claim 15, before Symbol second insulating cover is characterized in that it is provided on the side remote from the drive unit in the control plate (30) The electronic expansion valve described. The electronic expansion valve according to claim 16 , wherein a third accommodating groove (71) for accommodating the control plate is provided on the side of the second insulating lid facing the control plate. A fourth accommodating concave groove (72) for accommodating the lead wire (50) is further provided on the side of the second insulating lid facing the control plate, and the fourth accommodating concave groove (72) is said. The electronic expansion valve according to claim 17 , wherein the electronic expansion valve is located on one side of the third accommodating recess (71) and communicates with the third accommodating recess (71). The electronic expansion valve according to claim 16 , wherein the first insulating lid and the second insulating lid are engaged with each other so as to cover the outside of the control plate. The electronic expansion valve according to claim 16 , wherein the height of the first insulating lid is equal to or higher than the height of the second insulating lid. The electronic expansion valve further includes a transmission mechanism accommodating box (80) connected to the drive housing (100) and having an escape hole for the lead wire (50) to escape, the first insulating lid and the second insulating. The electronic expansion valve according to claim 16 , wherein when the lid is engaged, the inside of the escape hole is closed. The escape hole is a stepped hole, and a first boss (91) is provided in the middle of the first insulating lid, and a second boss (92) is provided in the middle of the second insulating lid. Platform (90) in which the first boss (91) and the second boss (92) are engaged with the stepped surface of the stepped hole when the first insulating lid and the second insulating lid are engaged. The electronic expansion valve according to claim 21 , wherein the electronic expansion valve is formed. The electronic expansion valve according to claim 15 , wherein the first insulating structure (60) and the second insulating structure (70) are integrally formed. A refrigeration system including an electronic expansion valve, wherein the electronic expansion valve is the electronic expansion valve according to any one of claims 13 to 23.

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