Electronic expansion valve solenoid coil cap, electronic expansion valve, air conditioner

Abstract

The present invention provides an electronic expansion valve electromagnetic coil cap, an electronic expansion valve, and an air conditioner, wherein the electronic expansion valve electromagnetic coil cap comprises a cap body, an electromagnetic coil is arranged in the cap body, a detection wire is also arranged in the cap body, a contact switch is connected in series on the detection wire, and the contact switch is constructed so that when the electronic expansion valve electromagnetic coil cap is placed on the electronic expansion valve body, the detection wire is turned on, and when the electronic expansion valve electromagnetic coil cap is separated from the electronic expansion valve body, the detection wire is disconnected. According to the present invention, the control board can detect the on-off state of the detection wire to realize the judgment of whether the electronic expansion valve electromagnetic coil cap is separated from the electronic expansion valve body, which is convenient for the operator to check and effectively prevent the occurrence of abnormal operation of the air conditioner due to the failure to reset the electronic expansion valve electromagnetic coil cap.

Description

Technical Field

[0001] The invention belongs to the technical field of air conditioning, and in particular relates to an electronic expansion valve electromagnetic coil cap, an electronic expansion valve and an air conditioner. Background Art

[0002] During the production testing and maintenance of the refrigeration system industry, the equipment is often vacuumed. For refrigeration equipment that uses an electronic expansion valve as a throttling element, in order to speed up the vacuuming process, the opening of the electronic expansion valve is usually adjusted to the maximum state. Some operators will also loosen the electromagnetic coil from the electronic expansion valve body, or unplug the electromagnetic coil plug on the controller motherboard, causing the electromagnetic coil to be unloaded. When the electromagnetic coil is unloaded, the opening of the electronic expansion valve body will not be adjusted, ensuring that the vacuuming speed is accelerated when the electronic expansion valve is at the maximum opening state.

[0003] However, after the vacuum is completed, the operator often forgets to put the electromagnetic coil into the electronic expansion valve body or plug the control line plug of the electromagnetic coil back into the controller mainboard. When the unit is operating normally, it is impossible to truly control the electronic expansion valve body. In particular, when the electromagnetic coil is detached from the valve body and forgotten to be put back, the controller of the refrigeration equipment cannot detect the detachment and no-load abnormality of the electromagnetic coil. Summary of the invention

[0004] Therefore, the present invention provides an electronic expansion valve electromagnetic coil cap, an electronic expansion valve, and an air conditioner, which can overcome the shortcomings of the related art that the controller cannot detect the electromagnetic coil escaping and running at no load under some working conditions, resulting in abnormal operation of the air conditioner.

[0005] In order to solve the above problems, the present invention provides an electronic expansion valve electromagnetic coil cap, including a cap body, an electromagnetic coil is arranged in the cap body, and a detection wire is also arranged in the cap body. A contact switch is connected in series with the detection wire. The contact switch is constructed to make the detection wire conductive when the electronic expansion valve electromagnetic coil cap is placed on the electronic expansion valve body, and to disconnect the detection wire when the electronic expansion valve electromagnetic coil cap is detached from the electronic expansion valve body.

[0006] In some embodiments, the contact switch includes a first conductive sheet electrically connected to the first section of the detection wire and a second conductive sheet electrically connected to the second section of the detection wire. The contact switch also includes a conductive conductive member, which can move toward the first conductive sheet and the second conductive sheet under the action of an external force to make the first conductive sheet and the second conductive sheet conductive, and can move away from the first conductive sheet and the second conductive sheet to disconnect the first conductive sheet and the second conductive sheet when the external force is released.

[0007] In some embodiments, a switch accommodating cavity is configured in the cap body, and the contact switch is located in the switch accommodating cavity.

[0008] In some embodiments, the first conductive sheet and the second conductive sheet are spaced apart and arranged on a cavity wall of the switch accommodating cavity.

[0009] In some embodiments, the switch accommodating cavity has a first side wall and a second side wall that are arranged opposite to each other, the first side wall and the second side wall form a bell-mouth structure, and the large mouth of the bell-mouth structure faces the side where the conductive conductive part is located, and the conductive conductive part has a first contact portion corresponding to the first conductive sheet and a second contact portion corresponding to the second conductive sheet.

[0010] In some embodiments, the switch accommodating cavity also has a bottom wall located at the large mouth position of the trumpet-mouth structure, and the contact switch also includes a guide rod, which is inserted into the bottom wall, and the end of the guide rod located in the switch accommodating cavity is connected to the conductive conductive member.

[0011] In some embodiments, the end of the guide rod located in the switch accommodating cavity is connected to the conducting conductive member via a first elastic member.

[0012] In some embodiments, a first limiting member is provided on the rod section of the guide rod located in the switch accommodating cavity, and the first elastic member is located on a side of the first limiting member away from the bottom wall.

[0013] In some embodiments, the end of the guide rod outside the switch accommodating chamber has a second limit member, and a second elastic member is sandwiched between the second limit member and the bottom wall.

[0014] In some embodiments, an elastic diaphragm is further connected to the cap body, and the elastic diaphragm can cover the end of the guide rod outside the switch accommodating cavity.

[0015] The present invention further provides an electronic expansion valve, comprising an electromagnetic coil cap, wherein the electromagnetic coil cap is the above-mentioned electronic expansion valve electromagnetic coil cap.

[0016] The present invention also provides an air conditioner, comprising the electronic expansion valve.

[0017] The electronic expansion valve solenoid coil cap, electronic expansion valve and air conditioner provided by the present invention can use the control board to detect the on-off state of the detection wire to determine whether the electronic expansion valve solenoid coil cap is detached from the electronic expansion valve body, which is convenient for operators to check and effectively prevent the occurrence of abnormal operation (fault) of the air conditioner caused by the failure to reset the electronic expansion valve solenoid coil cap. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the internal structure of an electromagnetic coil cap of an electronic expansion valve according to an embodiment of the present invention (the electromagnetic coil is not shown);

[0019] Figure 2 for Figure 1 A partial enlarged view of the middle A;

[0020] Figure 3 for Figure 1 A schematic diagram of a driving circuit of the electromagnetic coil of the electromagnetic coil cap of the electronic expansion valve;

[0021] Figure 4 The figure is a schematic diagram of the disassembled structure of an electronic expansion valve according to an embodiment of the present invention.

[0022] The reference numerals are:

[0023] 1. Cap body; 11. Switch accommodating chamber; 111. First side wall; 112. Second side wall; 113. Bottom wall; 2. Detection wire; 3. Contact switch; 31. First conductive sheet; 32. Second conductive sheet; 33. Conductive conductive member; 34. Guide rod; 341. First limit member; 342. Second limit member; 35. First elastic member; 36. Second elastic member; 4. Elastic diaphragm; 100. Electromagnetic coil; 200. Electromagnetic coil cap; 300. Electronic expansion valve body; 400. Connecting pipe. DETAILED DESCRIPTION

[0024] See also Figures 1 to 4As shown, according to an embodiment of the present invention, an electronic expansion valve electromagnetic coil cap is provided, comprising a cap body 1, a plurality of electromagnetic coils 100 are arranged in the cap body 1, a detection wire 2 is also arranged in the cap body 1, a contact switch 3 (also called a micro switch in the industry) is connected in series to the detection wire 2, and the contact switch 3 is constructed to make the detection wire 2 conductive when the electronic expansion valve electromagnetic coil cap is placed on the electronic expansion valve body 300, and to make the detection wire 2 disconnected when the electronic expansion valve electromagnetic coil cap is separated from the electronic expansion valve body 300. In specific applications, one end of the detection wire 2 is electrically connected to the control port of the control board, and the other end of the detection wire 2 is connected to the common port C of the electromagnetic coil 100, so that the control board can detect the on-off state of the detection wire 2 to realize the judgment of whether the electronic expansion valve electromagnetic coil cap is separated from the electronic expansion valve body 300, which is convenient for operators to check and effectively prevent the occurrence of abnormal operation of the air conditioner caused by the failure to reset the electronic expansion valve electromagnetic coil cap. It is understandable that when the detection wire 2 is in an open circuit state, the control board can make a corresponding fault alarm through the corresponding alarm component, such as through a buzzer, a light-emitting diode or a display code display, etc. This aspect is a conventional design in the control field and will not be elaborated in the present invention.

[0025] As a specific implementation, the contact switch 3 includes a first conductive sheet 31 electrically connected to the first section of the detection wire 2 and a second conductive sheet 32 ​​electrically connected to the second section of the detection wire 2. The contact switch 3 also includes a conductive member 33. The conductive member 33 can move toward the first conductive sheet 31 and the second conductive sheet 32 ​​under the action of an external force to make the first conductive sheet 31 and the second conductive sheet 32 ​​conductive, and can move away from the first conductive sheet 31 and the second conductive sheet 32 ​​to disconnect the first conductive sheet 31 and the second conductive sheet 32 ​​when the external force is released. In this technical solution, when the conductive member 33 is in contact with the first conductive sheet 31 and the second conductive sheet 32 ​​at the same time, the detection wire 2 is conductive, otherwise the detection wire 2 is disconnected. The conductive member 33 can be a conductive ball.

[0026] In some embodiments, a switch accommodating chamber 11 is constructed in the cap body 1, and the contact switch 3 is located in the switch accommodating chamber 11, so that the structure of the electronic expansion valve electromagnetic coil cap is more compact. Further, the first conductive sheet 31 and the second conductive sheet 32 ​​are arranged on the wall of the switch accommodating chamber 11 at intervals. Specifically, the switch accommodating chamber 11 has a first side wall 111 and a second side wall 112 arranged opposite to each other, and the first side wall 111 and the second side wall 112 form a bell-mouth structure, and the large mouth of the bell-mouth structure faces the side where the conductive conductive member 33 is located. The conductive conductive member 33 has a first contact portion corresponding to the first conductive sheet 31 and a second contact portion corresponding to the second conductive sheet 32. It can be understood that the first contact portion and the second contact portion are conductively connected. The bell-mouth structure can guide the contact process of the conductive conductive member 33 by using its reduced wall body, and the contact conduction is more reliable.

[0027] The switch accommodating chamber 11 also has a bottom wall 113 located at the large mouth position of the bell-mouth structure. The contact switch 3 also includes a guide rod 34, which is inserted into the bottom wall 113, and the end of the guide rod 34 located in the switch accommodating chamber 11 is connected to the conductive member 33. The bottom wall 113 can be connected to the cap body 1 in a detachable manner (for example, a threaded connection). On the one hand, the bottom wall 113 can make the position of the guide rod 34 more reliable, and on the other hand, it can form a seal for the switch accommodating chamber 11, so as to achieve a certain degree of dustproof, waterproof and insulation.

[0028] The end of the guide rod 34 in the switch accommodating chamber 11 is connected to the conducting conductive member 33 via a first elastic member 35. The first elastic member 35, for example, can be a coil spring, which is arranged between the end and the conducting conductive member 33, so that the contact impact between the conducting conductive member 33 and the first conductive sheet 31 and the second conductive sheet 32 ​​is buffered, thereby improving the service life of related components.

[0029] A first stopper 341 is provided on the rod section of the guide rod 34 in the switch accommodating chamber 11 , and the first elastic member 35 is located on the side of the first stopper 341 away from the bottom wall 113 , which can effectively prevent the guide rod 34 from escaping from the switch accommodating chamber 11 .

[0030] The end of the guide rod 34 outside the switch accommodating chamber 11 has a second stopper 342, and a second elastic member 36 is sandwiched between the second stopper 342 and the bottom wall 113. After the force applied at the end of the guide rod 34 is released, the second elastic member 36 can rely on the restoring elastic force of the second elastic member 36 to make the conductive conductive member 33 break away from the contact with the first conductive sheet 31 and the second conductive sheet 32. The first stopper 341 and the second stopper 342 are respectively detachably mounted on the guide rod 34.

[0031] In some embodiments, an elastic diaphragm 4 is also connected to the cap body 1, and the elastic diaphragm 4 can cover the end of the guide rod 34 outside the switch accommodating cavity 11. The elastic diaphragm 4 is preferably made of an insulating material, such as an elastic rubber film, which can be deformed under the action of the restoring elastic force of the second elastic member 36. It covers the outside of the contact switch and can form a sealing (waterproof and dustproof) and insulating (anti-electric shock) effect.

[0032] Figure 3 The driving circuit of the electromagnetic coil of the electromagnetic coil cap of the electronic expansion valve of the present invention is shown. It can be understood that, compared with the prior art, the contact switch 3 is connected in series on the detection wire 2 (corresponding to the power line in the prior art). It should be noted that in the conventional electromagnetic coil driving circuit, the power line is connected to the common port C of all electromagnetic coils, and different driving voltages are applied to both ends of the electromagnetic coil to generate excitations of different sizes and directions, thereby driving the valve core in the valve body 300 of the electronic expansion valve to produce different rotation directions and rotation steps, realizing the change of the flow diameter of the electronic expansion valve, and then realizing the adjustment of the refrigerant flow.

[0033] According to an embodiment of the present invention, there is also provided an electronic expansion valve, including an electromagnetic coil cap 200, wherein the electromagnetic coil cap 200 is the above-mentioned electronic expansion valve electromagnetic coil cap. Figure 4 The electromagnetic coil cap 200 is buckled onto the electronic expansion valve body 300 in a normal use state, and the electronic expansion valve body 300 is connected to a connecting pipe 400 .

[0034] During specific use, when the electromagnetic coil cap 200 is inserted into the electronic expansion valve body 300, when the limiting structure between the two is normal, the top of the electronic expansion valve body 300 will press the elastic diaphragm 4, causing the elastic diaphragm 4 to move toward the side of the cap body 1, which can drive the guide rod 34 to move upward, and the conductive ball (that is, the aforementioned conductive conductive member 33, the same below) rises and contacts the contact sheet (specifically the aforementioned first conductive sheet 31 and the second conductive sheet 32, the same below), thereby achieving the connection of the power line (that is, the aforementioned detection wire 2, the same below), and the conductive ball can no longer rise; if the elastic diaphragm continues to be squeezed, the limiting plate B (that is, the aforementioned first limiting member 341) inside the conductive ball squeezes the spring B (that is, the aforementioned first elastic member 35) driven by the guide rod, so that the guide rod can continue to move upward relative to the conductive ball until the elastic diaphragm stops moving. Figure 4 When the electromagnetic coil cap 200 is removed from the electronic expansion valve body 300, the pressing effect of the electronic expansion valve body 300 disappears, that is, the outward thrust of the elastic diaphragm disappears. At this time, the compressed spring A (that is, the second elastic member 36) pushes the guide rod and the elastic diaphragm to move downward, and the limit plate B on the guide rod (that is, the aforementioned second limit member 342) drives the conductive ball to move downward. Finally, the conductive ball is out of contact with the contact piece, and the micro switch on the power line is in an open circuit state.

[0035] When the refrigeration equipment is working normally, if the electromagnetic coil driving circuit is detected to be in an open circuit state, an alarm of electromagnetic coil detachment will be issued to remind the operator to check whether the electromagnetic coil is installed correctly and whether the control line plug of the electromagnetic coil is inserted normally until the fault is eliminated. How to detect the circuit is in an open circuit state is a conventional controller technology and will not be described in detail here.

[0036] According to an embodiment of the present invention, there is also provided an air conditioner, comprising the above-mentioned electronic expansion valve.

[0037] It is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0038] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention. The above are only preferred embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention, and these improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. An electronic expansion valve solenoid coil cap, characterized in that: The invention comprises a cap body (1), wherein an electromagnetic coil (100) is arranged inside the cap body (1), and a detection wire (2) is also arranged inside the cap body (1), and a contact switch (3) is connected in series to the detection wire (2), and the contact switch (3) is constructed so that when the electromagnetic coil cap of the electronic expansion valve is placed on the valve body (300) of the electronic expansion valve, the detection wire (2) is turned on, and when the electromagnetic coil cap of the electronic expansion valve is separated from the valve body (300) of the electronic expansion valve, the detection wire (2) is turned off.

2. The electronic expansion valve solenoid coil cap according to claim 1, characterized in that: The contact switch (3) comprises a first conductive sheet (31) electrically connected to a first section of the detection wire (2) and a second conductive sheet (32) electrically connected to a second section of the detection wire (2). The contact switch (3) further comprises a conductive member (33). The conductive member (33) can move towards the first conductive sheet (31) and the second conductive sheet (32) under the action of an external force so that the first conductive sheet (31) and the second conductive sheet (32) are conductive, and can move away from the first conductive sheet (31) and the second conductive sheet (32) when the external force is released so that the first conductive sheet (31) and the second conductive sheet (32) are disconnected.

3. The electronic expansion valve solenoid coil cap according to claim 2, characterized in that: A switch accommodating chamber (11) is constructed in the cap body (1), and the contact switch (3) is located in the switch accommodating chamber (11).

4. The electronic expansion valve solenoid coil cap according to claim 3, characterized in that: The first conductive sheet (31) and the second conductive sheet (32) are arranged at intervals on the cavity wall of the switch accommodating cavity (11).

5. The electronic expansion valve solenoid coil cap according to claim 4, characterized in that: The switch accommodating chamber (11) has a first side wall (111) and a second side wall (112) arranged opposite to each other, the first side wall (111) and the second side wall (112) forming a bell-mouth structure, and the large mouth of the bell-mouth structure faces the side where the conductive member (33) is located, and the conductive member (33) has a first contact portion corresponding to the first conductive sheet (31) and a second contact portion corresponding to the second conductive sheet (32).

6. The electronic expansion valve solenoid coil cap according to claim 5, characterized in that: The switch accommodating chamber (11) further comprises a bottom wall (113) located at the large mouth position of the bell-mouth structure, and the contact switch (3) further comprises a guide rod (34), wherein the guide rod (34) is inserted into the bottom wall (113), and an end of the guide rod (34) located in the switch accommodating chamber (11) is connected to the conductive member (33).

7. The electronic expansion valve solenoid coil cap according to claim 6, characterized in that: The end of the guide rod (34) located in the switch accommodating chamber (11) is connected to the conducting conductive member (33) via a first elastic member (35).

8. The electronic expansion valve solenoid coil cap according to claim 7, characterized in that: A first limiting member (341) is provided on the rod section of the guide rod (34) located in the switch accommodating chamber (11), and the first elastic member (35) is located on a side of the first limiting member (341) away from the bottom wall (113).

9. The electronic expansion valve solenoid coil cap according to claim 6, characterized in that: The end of the guide rod (34) outside the switch accommodating chamber (11) has a second limit piece (342), and a second elastic piece (36) is sandwiched between the second limit piece (342) and the bottom wall (113).

10. The electronic expansion valve solenoid coil cap according to claim 9, characterized in that: The cap body (1) is also connected to an elastic diaphragm (4), and the elastic diaphragm (4) is capable of covering the end of the guide rod (34) outside the switch accommodating chamber (11).

11. An electronic expansion valve, comprising a solenoid coil cap (200), characterized in that: The electromagnetic coil cap (200) is the electromagnetic coil cap of the electronic expansion valve according to any one of claims 1 to 10.

12. An air conditioner, characterized in that: Includes the electronic expansion valve as claimed in claim 11.

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