Air conditioner

Abstract

The utility model discloses an air conditioner, and belongs to the technical field of air treatment. The air conditioner comprises an electrical box; the electrical box is internally provided with: a metal mounting plate, the back surface of which faces the box bottom of the electrical box; the substrate is connected to the back surface of the metal mounting plate; the grounding assembly is connected between the metal mounting plate and the substrate, and the grounding assembly comprises an insulating base which is connected with the metal mounting plate; the stud is made of a metal material, one end of the stud is connected to the insulating base, the other end of the stud extends towards the direction of the substrate, and the stud is provided with a through threaded hole; the first grounding screw penetrates through the metal mounting plate and is connected with the stud; and the second grounding screw penetrates through the substrate and is connected with the stud. The air conditioner does not need to independently design a ground wire for the substrate and is low in cost.

Description

Technical Field

[0001] The present application relates to the technical field of air treatment, and in particular to an air conditioner. Background Art

[0002] As an important component of the air conditioner, the electrical box is used to realize the electrical control function of the air conditioner. In order to meet the compact design, the electrical parts inside the electrical box need to be installed in multiple layers. Some substrates in the electrical box, such as filter boards and lightning protection boards, need to be functionally grounded. However, after the air conditioner is assembled, the electrical system needs to be tested for withstand voltage. At this time, the functional grounding needs to be disconnected, and the grounding connection is made after the test is completed. For substrate grounding, the conventional practice is to lead out the grounding wire, and after the withstand voltage test is completed, the grounding wire is connected from the front of the electrical box. This method has low operating efficiency and high grounding cost. Utility Model Content

[0003] The present application provides an air conditioner which does not require a separate ground wire to be designed for a substrate and has the advantage of low cost.

[0004] In one aspect of the present application, an air conditioner comprises: an electrical box; a metal mounting plate is provided in the electrical box, the back side of which faces the bottom of the electrical box; a base plate is connected to the back side of the metal mounting plate; a grounding assembly is connected between the metal mounting plate and the base plate, the grounding assembly comprises: an insulating base connected to the metal mounting plate; a stud made of metal, one end of the stud is connected to the insulating base, the other end of the stud extends toward the base plate, and the stud has a through threaded hole; a first grounding screw passes through the metal mounting plate and is connected to the stud; a second grounding screw passes through the base plate and is connected to the stud.

[0005] In some embodiments, the insulating base includes: a base body, on which a plurality of claws extending toward the metal mounting plate are arranged at intervals; the metal mounting plate is provided with a penetrating slot, and the claws are engaged with the slot.

[0006] In some embodiments, the base body is cylindrical, and there are at least three claws distributed along the circumference.

[0007] In some embodiments, the insulating base includes: a base body, on which a mounting hole for mounting a stud is provided, a stop portion is provided at the inner end of the mounting hole, and the stop portion abuts against the end of the stud; a first grounding screw passes through a metal mounting plate, and the stop portion is connected to the stud.

[0008] In some embodiments, an end of the stopper away from the stud abuts against the metal mounting plate.

[0009] In some embodiments, a knurled portion is provided at one end of the stud, and the knurled portion is embedded in the insulating base.

[0010] In some embodiments, a conductive layer is provided on a side of the substrate away from the metal mounting plate, and the second grounding screw passes through the substrate from the conductive layer, and the second grounding screw contacts the conductive layer.

[0011] In some embodiments, the conductive layer is a conductive copper foil, a recess is provided on the substrate, and the conductive copper foil is connected to the recess.

[0012] In some embodiments, an end of the stud away from the metal mounting plate abuts against the base plate.

[0013] Another aspect of the present application is an air conditioner, comprising: an electrical box; a metal mounting plate is arranged in the electrical box; a base plate connected to the metal mounting plate; a grounding component connected between the metal mounting plate and the base plate, the grounding component comprising: an insulating base connected to the metal mounting plate; a stud made of metal, one end of the stud is connected to the insulating base, the other end of the stud extends toward the base plate, and the stud has a through threaded hole; a first grounding screw passes through the metal mounting plate and is connected to the stud; a second grounding screw passes through the base plate and is connected to the stud. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 shows a perspective view of an air conditioner according to some embodiments;

[0015] Figure 2 shows a perspective view of an air conditioner according to some embodiments from a rear side perspective;

[0016] Figure 3 shows an internal structure diagram of an air conditioner according to some embodiments;

[0017] Figure 4 shows a perspective view of an electrical box of an air conditioner according to some embodiments;

[0018] Figure 5 shows a cross-sectional view of an electrical box of an air conditioner according to some embodiments;

[0019] Figure 6 Shows Figure 5 A-axis enlarged view;

[0020] Figure 7 A diagram showing a connection structure of a metal mounting plate and a base plate of an air conditioner according to some embodiments is shown;

[0021] Figure 8 shows a perspective view of a base plate of an air conditioner according to some embodiments;

[0022] Fig. 9 shows an exploded view of a metal mounting plate and grounding assembly of an air conditioner according to some embodiments;

[0023] Fig.10A connection structure diagram of an insulating base and a stud of an air conditioner according to some embodiments is shown.

[0024] In the above figures, 10, housing; 11, front plate; 12, rear plate; 13, top plate; 14, bottom plate; 15, left side plate; 16, right side plate; 17, grille plate; 18, partition plate; 191, fan chamber; 192, press chamber; 20, fan; 21, motor bracket; 30, heat exchanger; 40, electrical box; 41, box body; 42, box cover; 43, metal mounting plate; 431, slot; 44, Substrate; 441, conductive layer; 442, recessed portion; 45, grounding assembly; 451, insulating base; 4511, base body; 4512, claw; 4513, first mounting portion; 4514, second mounting portion; 4515, mounting hole; 4516, stop portion; 452, stud; 4521, knurled portion; 453, first grounding screw; 454, second grounding screw; 46, support column. DETAILED DESCRIPTION

[0025] In order to make the purpose and implementation method of the present application clearer, the exemplary implementation method of the present application will be clearly and completely described below in conjunction with the drawings in the exemplary embodiments of the present application. Obviously, the described exemplary embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0026] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0027] The terms "first", "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0028] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0029] The air conditioner in this application performs a refrigeration cycle of the air conditioner by using a compressor, a condenser, an expansion valve and an evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion and evaporation, and supplies refrigerant to the air that has been conditioned and heat-exchanged.

[0030] The compressor compresses the refrigerant gas in a low temperature and low pressure state and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and the heat is released to the surrounding environment through the condensation process.

[0031] The expansion valve expands the high-temperature and high-pressure liquid refrigerant condensed in the condenser into a low-pressure liquid refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor. The evaporator can achieve a refrigeration effect by utilizing the latent heat of evaporation of the refrigerant to exchange heat with the material to be cooled. In the entire cycle, the air conditioner can adjust the temperature of the indoor space.

[0032] The outdoor unit of the air conditioner refers to a portion of a refrigeration cycle including a compressor and an outdoor heat exchanger, the indoor unit of the air conditioner includes an indoor heat exchanger, and an expansion valve may be provided in the indoor unit or the outdoor unit.

[0033] The indoor heat exchanger and the outdoor heat exchanger function as a condenser or an evaporator. When the indoor heat exchanger functions as a condenser, the air conditioner functions as a heater in a heating mode, and when the indoor heat exchanger functions as an evaporator, the air conditioner functions as a cooler in a cooling mode.

[0034] The air conditioner according to the embodiment of the present application includes an outdoor unit installed in an outdoor space and an indoor unit installed in an indoor space. In other embodiments, the outdoor unit and the indoor unit may also be an integrated unit.

[0035] An electrical box 40 is usually provided in the outdoor unit and / or the indoor unit.

[0036] The following is an introduction using the outdoor unit in the air conditioner as an example:

[0037] Reference Figures 1 to 3The outdoor unit includes a housing 10, which constitutes the overall appearance of the outdoor unit. The housing 10 may be in a rectangular box shape.

[0038] The shell 10 includes a front plate 11 constituting the front surface of the shell 10, a rear plate 12 constituting the back surface of the shell 10, a top plate 13 constituting the upper surface of the shell 10, a bottom plate 14 constituting the lower surface of the shell 10, and a left side plate 15 and a right side plate 16 constituting a pair of side surfaces of the shell 10.

[0039] A partition 18 may be provided in the housing 10. The partition 18 is vertically arranged in the housing 10 to divide the space in the housing 10 into a fan chamber 191 and a compressor chamber 192 arranged on the left and right, wherein the fan chamber 191 is located on the left and the compressor chamber 192 is located on the right. The fan chamber 191 may be installed with components such as a fan 20 and a heat exchanger 30, and the compressor chamber 192 may be installed with components such as a compressor and an expansion valve.

[0040] An air inlet is formed on the left side plate 15 and the rear plate 12 of the housing 10 for sucking air from the outside. An opening is provided on the front plate 11 of the housing 10, and a grille plate 17 can be installed at the opening. The holes on the grille plate 17 form an air outlet for blowing air from the inside of the housing 10 to the outside. The grille plate 17 can prevent external objects from contacting the fan 20 in the housing 10. The air inlet and the air outlet are both connected to the fan chamber 191.

[0041] The outdoor unit includes a fan 20 for driving air flow. The fan 20 is mounted on a motor bracket 21. The motor bracket 21 is disposed between the fan 20 and the heat exchanger 30.

[0042] The outdoor unit includes a heat exchanger 30, which is connected to the housing 10 corresponding to the air inlet. The heat exchanger 30 is located on the suction side of the fan 20, and has a plurality of fins stacked in parallel, and a heat transfer tube that penetrates each fin in the stacking direction. The heat transfer tube is connected to the refrigerant circuit so that the refrigerant flows in the heat transfer tube. The heat exchanger 30 acts as an evaporator when the air conditioner is in heating operation, and acts as a condenser when the air conditioner is in cooling operation.

[0043] The outdoor unit includes an electrical box 40 for realizing the electrical control function of the air conditioner. The electrical box 40 can be installed in the compressor cavity 192, or the electrical box 40 can be installed at the inner top of the housing 10, across the partition 18, with its left part located in the fan cavity 191 and its right part located in the compressor cavity 192.

[0044] Reference Figure 4 and Figure 5According to the embodiment of the present application, the electrical box 40 may be in the shape of a rectangular box. The electrical box 40 may include a box body 41 and a box cover 42, and the box cover 42 may be detachably connected to the box body 41. The electrical components in the electrical box 40 may be disassembled and assembled by removing the box cover 42.

[0045] A metal mounting plate 43 may be provided in the electrical box 40, and the metal mounting plate 43 may be mounted in the electrical box 40 by welding or threaded connection. The metal mounting plate 43 serves as a mounting carrier for electrical components.

[0046] The metal mounting plate 43 is connected with a substrate 44, which is a printed circuit board. The substrate 44 is usually connected to the metal mounting plate 43 through a support column 46, so that a gap is formed between the substrate 44 and the metal mounting plate 43, so that electrical components can also be arranged on the side of the substrate 44 facing the metal mounting plate 43.

[0047] A grounding component 45 is also connected between the substrate 44 and the metal mounting plate 43 to achieve functional grounding connection of components such as filters and lightning protection boards on the substrate 44 .

[0048] Reference Figure 6 and Figure 7 According to the embodiment of the present application, the grounding assembly 45 comprises an insulating base 451 and a stud 452. The insulating base 451 is connected to the metal mounting plate 43, one end of the stud 452 is connected to the insulating base 451, and the other end of the stud 452 extends toward the substrate 44.

[0049] The grounding assembly 45 may include a first grounding screw 453. The first grounding screw 453 penetrates the metal mounting plate 43 and is connected to the stud 452.

[0050] The grounding assembly 45 may include a second grounding screw 454 . The second grounding screw 454 penetrates the base plate 44 and is connected to the stud 452 .

[0051] In the present application, the stud 452 is made of metal, and the second grounding screw 454 is connected to the stud 452 to achieve grounding conduction between the substrate 44 and the stud 452. The stud 452 is connected to the first grounding screw 453 to achieve grounding conduction between the metal mounting plate 43 and the stud 452, that is, the grounding conduction between the substrate 44 and the metal mounting plate 43 is achieved through the grounding component 45, that is, there is no need to connect a grounding wire on the substrate 44, and the grounding connection of the substrate 44 is achieved through the grounding component 45.

[0052] When the electrical system needs to be subjected to a withstand voltage test after the air conditioner is assembled, it is only necessary to unscrew the first grounding screw 453 to disconnect the ground of the substrate 44. After the test is completed, the first grounding screw 453 is installed on the metal mounting plate 43 to achieve grounding conduction of the substrate 44.

[0053] Compared with the problems of low operating efficiency and high ground wire cost caused by leading the ground wire from the substrate 44 to achieve the grounding function in the prior art, the present application sets a grounding component 45 between the metal mounting plate 43 and the substrate 44, and the grounding connection of the substrate 44 is achieved by the grounding component 45. There is no need to design a ground wire separately, and the application has the advantages of reliable grounding, high efficiency and low cost.

[0054] In some embodiments, the metal mounting plate 43 has a front side and a back side, the back side of the metal mounting plate 43 faces the bottom of the electrical box 40, and the front side of the metal mounting plate 43 faces the cover 42 of the electrical box 40. The substrate 44 is connected to the back side of the metal mounting plate 43. That is, the substrate 44 is located in the inner layer of the metal mounting plate 43.

[0055] In the prior art, the grounding treatment method of the substrate 44 is to lead out a ground wire from the substrate 44, and then connect the ground wire from the front side of the electrical box 40 after the withstand voltage test is completed.

[0056] In the present application, by providing a grounding assembly 45 to replace the ground wire, only screwing operation is required, and no wiring operation is required, thereby improving operation efficiency.

[0057] In some embodiments, reference Figure 6 , a conductive layer 441 is provided on the substrate 44, and the conductive layer 441 is connected to the grounding circuit on the substrate 44. A second grounding screw 454 is passed through the conductive layer 441 and connected to the substrate 44 and the stud 452, and the second grounding screw 454 is in contact with the conductive layer 441. In this way, the conductive layer 441 on the substrate 44 is electrically connected to the stud 452 through the second grounding screw 454.

[0058] According to an embodiment of the present application, a screw mounting hole for the second grounding screw 454 to pass through is provided on the substrate 44, and the conductive layer 441 is provided on the outer circle of the screw mounting hole.

[0059] Reference Figure 8 A recessed portion 442 may be provided on the substrate 44 , and the recessed portion 442 is located on a side of the screw mounting hole away from the stud 452 , and the screw mounting hole on the substrate 44 passes through the recessed portion 442 .

[0060] The conductive layer 441 may be a conductive copper foil. The conductive copper foil may be disposed in the recessed portion 442 .

[0061] The connection between the conductive copper foil and the substrate 44, and the connection between the conductive copper foil and the conductive circuit in the substrate 44 are applicable to the existing technology and will not be described in detail here.

[0062] According to an embodiment of the present application, the insulating base 451 can be made of an insulating material such as plastic, which is connected between the stud 452 and the metal mounting plate 43, and can separate the stud 452 from the metal mounting plate 43 to avoid contact between the two. In this way, the grounding between the stud 452 and the metal mounting plate 43 can be disconnected when the first grounding screw 453 is unscrewed, and the grounding between the stud 452 and the metal mounting plate 43 can be connected when the first grounding screw 453 is screwed on.

[0063] In some embodiments, reference Fig. 9 and Fig.10 The insulating base 451 includes a base body 4511. The end of the base body 4511 is provided with a plurality of claws 4512 extending outwardly along the axial direction. The claws 4512 are used to be clamped with the metal mounting plate 43.

[0064] A slot 431 is formed on the metal mounting plate 43 at a position corresponding to the claw 4512 , and the claw 4512 is engaged with the slot 431 .

[0065] The insulating base 451 may be cylindrical, and at least three claws 4512 are arranged along the circumference of the insulating base 451 , which can ensure the stability and reliability of the clamping between the insulating base 451 and the metal mounting plate 43 .

[0066] The clamping connection between the insulating base 451 and the metal mounting plate 43 can prevent the grounding component 45 from rotating when the screws are tightened.

[0067] In addition, the clamping connection between the insulating base 451 and the metal mounting plate 43 can improve the installation efficiency, and it is only necessary to align the claw 4512 with the slot 431 and insert it.

[0068] In some embodiments, the insulating base 451 includes two cylinders, one large and one small, along the axial direction. The two cylinders are a first mounting portion 4513 and a second mounting portion 4514, wherein the first mounting portion 4513 is a small cylinder for connecting to the stud 452; the second mounting portion 4514 is a large cylinder for connecting to the metal mounting plate 43.

[0069] The claw 4512 is disposed at an end portion of the second mounting portion 4514 .

[0070] By reducing the outer diameter of the first mounting portion 4513 relative to the second mounting portion 4514 , the material for manufacturing the insulating base 451 can be saved.

[0071] In some embodiments, a mounting hole 4515 is provided on the base body 4511 , and the stud 452 is installed in the mounting hole 4515 .

[0072] When the insulating base 451 is injection molded, the end of the stud 452 is embedded in the plastic to achieve an embedded connection between the stud 452 and the insulating base 451 .

[0073] The portion of the stud 452 mounted to the insulating base 451 may be provided with a protruding knurled portion 4521, which may specifically be a knurled pattern. The knurled portion 4521 may strengthen the connection strength between the stud 452 and the insulating base 451, thereby ensuring the reliability and firmness of the connection between the two.

[0074] In other embodiments, the stud 452 and the insulating base 451 may also be connected by means of threads, snaps, or a combination of the two.

[0075] In some embodiments, reference Figure 6 and Fig.10 A stopper 4516 protruding radially inward is provided in the mounting hole 4515. The end of the stud 452 abuts against the stopper 4516. The stopper 4516 can form an axial limit for the stud 452, so as to prevent the insulating base 451 from being deformed by force during the tightening process of the second grounding screw 454, thereby pulling the base plate 44 to deform.

[0076] The end surface of the base body 4511 facing the metal mounting plate 43 abuts against the metal mounting plate 43. The stopper 4516 is located between the metal mounting plate 43 and the stud 452 in the axial direction of the stud 452, and the stopper 4516 can isolate and insulate the metal mounting plate 43 and the stud 452.

[0077] The end surface of the stopper 4516 away from the stud 452 abuts against the metal mounting plate 43. The metal mounting plate 43 can support the stopper 4516, increase the supporting strength of the stopper 4516 for the stud 452, and at the same time increase the contact area between the base body 4511 and the metal mounting plate 43, thereby improving the connection stability.

[0078] During assembly, the claw 4512 of the insulating base 451 is inserted into the metal mounting plate 43, and the support column 46 is installed on the metal mounting plate 43 by means of claws or threads. The substrate 44 is connected to the support column 46, and the second grounding screw 454 is passed through the substrate 44 and connected to the stud 452. The second grounding screw 454 is in contact with the conductive copper foil on the substrate 44. Then, the substrate 44 is loaded into the electrical box 40 facing downward, and the completed electrical box 40 is installed to the outdoor unit and connected. After the wiring is completed, a withstand voltage test is performed. After the test is completed, the first grounding screw 453 is passed through the metal mounting plate 43 from the front and connected to the stud 452.

[0079] In the present application, a grounding component 45 is arranged between the metal mounting plate 43 and the substrate 44, and the grounding connection of the substrate 44 is realized by the grounding component 45. Compared with the problems of low operating efficiency and high grounding wire cost caused by leading the ground wire from the substrate 44 to realize the grounding function in the prior art, the present application does not need to design a separate ground wire, and has the advantages of reliable grounding, high efficiency and low cost.

[0080] In the present application, a first grounding screw 453 is passed through the metal mounting plate 43 and connected to the stud 452, and a second grounding screw 454 is passed through the substrate 44 and connected to the stud 452, thereby achieving grounding conduction between the substrate 44 and the metal mounting plate 43, which has the advantages of simple structure and simple operation.

[0081] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

[0082] For the convenience of explanation, the above description has been made in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or limit the embodiments to the specific forms disclosed above. Based on the above teachings, various modifications and variations can be obtained. The selection and description of the above embodiments are to better explain the principles and practical applications, so that those skilled in the art can better use the embodiments and various different variations of the embodiments suitable for specific use considerations.

Claims

1. An air conditioner, characterized in that: include: Electrical box; The electrical box is provided with: A metal mounting plate, the back side of which faces the bottom of the electrical box; a base plate connected to the back side of the metal mounting plate; A grounding component is connected between the metal mounting plate and the substrate, and the grounding component includes: An insulating base connected to the metal mounting plate; A stud, which is made of metal, one end of which is connected to the insulating base, the other end of which extends toward the substrate, and the stud has a through threaded hole; A first grounding screw, which passes through the metal mounting plate and is connected to the stud; A second grounding screw passes through the base plate and is connected to the stud.

2. The air conditioner according to claim 1, characterized in that: The insulating base comprises: A base body, on which a plurality of claws extending toward the metal mounting plate are provided at intervals; The metal mounting plate is provided with a penetrating slot, and the clamping claw is clamped in the slot.

3. The air conditioner according to claim 2, characterized in that: The base body is cylindrical, and at least three claws are distributed along the circumference.

4. The air conditioner according to claim 1, characterized in that: The insulating base comprises: A base body, on which a mounting hole for mounting the stud is provided, and an inner end of the mounting hole is provided with a stopper, the stopper abuts against the end of the stud; The first grounding screw passes through the metal mounting plate, and the stopper is connected to the stud.

5. The air conditioner according to claim 4, characterized in that: One end of the stopper away from the stud abuts against the metal mounting plate.

6. The air conditioner according to claim 1, characterized in that: A knurled portion is provided at one end of the stud, and the knurled portion is embedded in the insulating base.

7. The air conditioner according to claim 1, characterized in that: A conductive layer is provided on a side of the substrate away from the metal mounting plate, and the second grounding screw passes through the substrate from the conductive layer, and the second grounding screw contacts the conductive layer.

8. The air conditioner according to claim 7, characterized in that: The conductive layer is a conductive copper foil, a recessed portion is provided on the substrate, and the conductive copper foil is connected to the recessed portion.

9. The air conditioner according to claim 1, characterized in that: One end of the stud away from the metal mounting plate abuts against the base plate.

10. An air conditioner, characterized in that: include: Electrical box; The electrical box is provided with: Metal mounting plate; a base plate connected to the metal mounting plate; A grounding component is connected between the metal mounting plate and the substrate, and the grounding component includes: An insulating base connected to the metal mounting plate; A stud, which is made of metal, one end of which is connected to the insulating base, the other end of which extends toward the substrate, and the stud has a through threaded hole; A first grounding screw, which passes through the metal mounting plate and is connected to the stud; A second grounding screw passes through the base plate and is connected to the stud.

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