Variable frequency air conditioner pressure sensor packaging structure

Abstract

The utility model discloses a variable frequency air conditioner pressure sensor packaging structure, which comprises a shell, a pressure sensing component is arranged in the shell, and an electrical connector connected with the pressure sensing component through a circuit board is arranged outside the shell. A metal shielding cover is arranged in the shell, and the pressure sensing component is located in the metal shielding cover; an insulation shielding gap is formed between the metal shielding cover and the shell, the insulation shielding gap is filled with an insulation shielding object, and insulation shielding is achieved between the electric connector contact pin of the electric connector and the shell through the insulation shielding object. According to the utility model, the ceramic capacitor is adopted as the pressure sensing component, the metal shielding case is arranged outside the pressure sensing component, and the insulation shielding object is arranged between the metal shielding case and the shell for insulation protection, so that the high insulation and pressure resistance performance of the sensor is realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of pressure sensors, and particularly relates to a packaging structure of a pressure sensor for a variable-frequency air conditioner. Background Art

[0002] The voltage output accuracy of a pressure sensor is easily affected by electromagnetic interference and conductive fluid of itself and external electronic products. During the operation of the pressure sensor, due to factors such as equipment start-stop, power grid impact, faults or lightning strikes, instantaneous overvoltage exceeding the normal working voltage may be generated. When the conditioning circuit of the pressure sensor is connected to the shell and a conductive path is formed between the power supply, the conditioning circuit and the shell, when the instantaneous overvoltage passes through the conductive path, the conditioning circuit and the pressure detection component will be broken down, easily leading to the failure of the pressure sensor. Summary of the Invention

[0003] Object of the Invention: In order to overcome the deficiencies in the prior art, the utility model provides a packaging structure of a pressure sensor for a variable-frequency air conditioner. By using a ceramic capacitor as the pressure-sensing component, an external metal shielding cover is provided for the pressure-sensing component, and an insulating shield is used between the metal shielding cover and the shell for insulation protection, so as to achieve the high insulation withstanding voltage performance of the sensor.

[0004] Technical Solution: To achieve the above object, a packaging structure of a pressure sensor for a variable-frequency air conditioner of the utility model includes a shell, a pressure-sensing component is arranged inside the shell, and an electrical connector connected to the pressure-sensing component through a circuit board is arranged outside.

[0005] A metal shielding cover is arranged inside the shell, and the pressure-sensing component is located inside the metal shielding cover; an insulating shielding gap is formed between the metal shielding cover and the shell, and the insulating shielding gap is filled with an insulating shield, and insulation shielding is achieved between the electrical connector pin of the electrical connector and the shell through the insulating shield.

[0006] Further, a rectangular ring for supporting the pressure-sensing component is arranged at the inner bottom of the metal shielding cover, and the pressure-sensing component is a ceramic capacitor.

[0007] Further, the insulating shielding gap includes a side insulating shielding gap and a bottom insulating shielding gap formed between the metal shielding cover and the shell; the insulating shield includes a side wrapping insulating shield and a bottom edge insulating shield; the side wrapping insulating shield is correspondingly arranged to wrap the side insulating shielding gap, and the bottom edge insulating shield is correspondingly arranged at the edge of the bottom insulating shielding gap.

[0008] Further, the side wrapping insulating shield is an insulating paper for wrapping the side insulating shielding gap, and the thickness of the insulating paper is increased by stacking to fill the side insulating shielding gap.

[0009] Furthermore, the bottom edge insulating shield is a thermoplastic solid filled at the edge of the bottom insulating shield gap, and this thermoplastic solid has physical properties of high temperature resistance, corrosion resistance, and insulation.

[0010] Furthermore, an O-ring is arranged in the bottom insulating shield gap, and the O-ring is extruded and arranged between the metal shield and the outer shell.

[0011] Beneficial effects: By using a ceramic capacitor as the pressure sensing component in the present utility model, with the pressure sensing component externally provided with a metal shield, and using an insulating shield between the metal shield and the outer shell for insulation protection, the high insulation voltage withstand performance of the sensor is achieved, meeting the general requirement in the home appliance industry that the insulation resistance between the electrical connector pin of the electrical connector and the outer shell should reach at least 1800V AC for 1 second without breakdown, greatly improving the use safety and service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a half-sectional structural schematic diagram of the pressure sensor of the present utility model;

[0013] Figure 2 is Figure 1 an enlarged structural schematic diagram of area A in DETAILED DESCRIPTION OF THE EMBODIMENTS

[0014] The present utility model will be further described in detail below with reference to the drawings.

[0015] As Figure 1 and Figure 2 shown, a variable frequency air conditioner pressure sensor packaging structure includes an outer shell 1, a pressure sensing component 2 is arranged inside the outer shell 1, and an electrical connector 4 connected to the pressure sensing component 2 through a circuit board 3 is arranged externally; a metal shield 5 is arranged inside the outer shell 1, and the pressure sensing component 2 is located inside the metal shield 5; an insulating shield gap 6 is formed between the metal shield 5 and the outer shell 1, an insulating shield 7 is filled in the insulating shield gap 6, and insulation shielding is achieved between the electrical connector pin of the electrical connector 4 and the outer shell 1 through the insulating shield 7. More specifically, a rectangular ring 8 for supporting the pressure sensing component 2 is arranged at the inner bottom of the metal shield 5, and the pressure sensing component 2 is a ceramic capacitor. By using a ceramic capacitor as the pressure sensing component 2, with the pressure sensing component 2 externally provided with a metal shield 5, and using an insulating shield 7 between the metal shield 5 and the outer shell 1 for insulation protection, the high insulation voltage withstand performance of the sensor is achieved, meeting the general requirement in the home appliance industry that the insulation resistance between the electrical connector pin of the electrical connector 4 and the outer shell 1 should reach at least 1800V AC for 1 second without breakdown, greatly improving the use safety and service life.

[0016] Among them, the electrical connector 4 is tightly assembled with the housing 1 by means of a riveted and bent part. The metal shielding cover 5 is preferably a stainless steel cover body.

[0017] In order to improve the protection coverage and the insulation protection performance, in the present utility model, as Figure 2 shown, the insulation shielding gap 6 includes a side insulation shielding gap 61 and a bottom insulation shielding gap 62 formed between the metal shielding cover 5 and the housing 1; the insulation shielding 7 includes a side wrapping insulation shielding 71 and a bottom edge insulation shielding 72; the side wrapping insulation shielding 71 is correspondingly arranged to wrap the side insulation shielding gap 61, and the bottom edge insulation shielding 72 is correspondingly arranged at the edge of the bottom insulation shielding gap 62. The side wrapping insulation shielding 71 realizes side insulation protection, and the bottom edge insulation shielding 72 realizes bottom insulation protection, so that the insulation protection is more comprehensive and the effect is better.

[0018] As a preference, the side wrapping insulation shielding 71 of the present utility model is an insulating paper that wraps the side insulation shielding gap 61. In order to improve the filling compactness and ensure the structural stability, the insulating paper increases its thickness by means of lamination to fill the side insulation shielding gap 61 completely.

[0019] The bottom edge insulation shielding 72 is a thermoplastic solid filled at the edge of the bottom insulation shielding gap 62, and this thermoplastic solid has the physical properties of being high-temperature resistant, corrosion resistant and insulating, that is, the bottom edge insulation shielding 72 is made of a thermoplastic solid material with high-temperature resistance, corrosion resistance and insulation.

[0020] An O-ring 9 is arranged in the bottom insulation shielding gap 62, and the O-ring 9 is extruded and arranged between the metal shielding cover 5 and the housing 1. The O-ring 9 is used to improve the sealing performance, and because its material is relatively soft, it can also provide a certain shock-absorbing and buffering effect.

[0021] The above are only the preferred embodiments of the present utility model. It should be pointed out that: for those of ordinary skill in the art of this technology, without departing from the principle of the present utility model, several improvements and refinements can still be made, and these improvements and refinements should also be regarded as the protection scope of the present utility model.

Claims

1. A pressure sensor packaging structure for a variable-frequency air conditioner, comprising a housing (1), a pressure-sensitive component (2) is disposed inside the housing (1), and an electrical connector (4) connected to the pressure-sensitive component (2) through a circuit board (3) is disposed outside the housing. It is characterized in that: A metal shielding cover (5) is disposed inside the housing (1), and the pressure-sensitive component (2) is located inside the metal shielding cover (5); an insulating shielding gap (6) is formed between the metal shielding cover (5) and the housing (1), and an insulating shielding material (7) is filled in the insulating shielding gap (6). Insulating shielding is achieved between the electrical connector pins of the electrical connector (4) and the housing (1) through the insulating shielding material (7).

2. The pressure sensor packaging structure of a variable-frequency air conditioner according to claim 1, characterized in that: A rectangular ring (8) for supporting the pressure-sensitive component (2) is disposed at the inner bottom of the metal shielding cover (5), and the pressure-sensitive component (2) is a ceramic capacitor.

3. A pressure sensor packaging structure for a variable-frequency air conditioner according to claim 1, characterized in that: The insulating shielding gap (6) includes a side insulating shielding gap (61) and a bottom insulating shielding gap (62) formed between the metal shielding cover (5) and the housing (1); the insulating shielding material (7) includes a side-wrapping insulating shielding material (71) and a bottom-edge insulating shielding material (72); the side-wrapping insulating shielding material (71) is correspondingly disposed to wrap the side insulating shielding gap (61), and the bottom-edge insulating shielding material (72) is correspondingly disposed at the edge of the bottom insulating shielding gap (62).

4. A pressure sensor packaging structure for a variable frequency air conditioner according to claim 3, characterized in that: The side-wrapping insulating shielding material (71) is an insulating paper that wraps the side insulating shielding gap (61), and the thickness of the insulating paper is increased by laminating to fill the side insulating shielding gap (61).

5. The pressure sensor packaging structure of a variable frequency air conditioner according to claim 3, characterized in that: The bottom-edge insulating shielding material (72) is a thermoplastic solid filled at the edge of the bottom insulating shielding gap (62), and the thermoplastic solid has physical properties of high temperature resistance, corrosion resistance, and insulation.

6. The pressure sensor packaging structure of a variable frequency air conditioner according to claim 3, characterized in that: An O-ring (9) is disposed inside the bottom insulating shielding gap (62), and the O-ring (9) is squeezed between the metal shielding cover (5) and the housing (1).

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