Waterproof temperature controller for vehicle air conditioner

Abstract

The utility model relates to the technical field of thermal protectors, in particular to a waterproof temperature controller for a vehicle air conditioner, the temperature controller adopts a double-protector parallel design, at least two protectors are arranged in a shell of the temperature controller in parallel, and the protectors are connected into a control loop in parallel through a first lead and a second lead; the parallel connection structure ensures that even if a single protector is in poor contact due to contact oxidation, pollution or mechanical abrasion, the other protector can still maintain loop conduction, the signal transmission reliability in a low-voltage environment is remarkably improved, and the problem of temperature control failure caused by the risk of poor contact of contacts existing in an existing temperature controller is solved. The waterproof and temperature-resistant problems are solved through double sealing glue, silica gel is firstly sealed at the port of the shell to play a role in temperature-resistant sealing, and then epoxy resin glue is sealed to play a role in fixing and simultaneously play a role in strengthening the waterproof effect; the silica gel layer is relatively soft and cannot fix the lead, and if the lead is not fixed, the silica gel layer is damaged and the sealing performance is easy to lose efficacy, so that the resin layer is added for sealing.

Description

Technical Field

[0001] This utility model relates to the field of thermal protector technology, and in particular to a waterproof thermostat for automotive air conditioning. Background Technology

[0002] In automotive air conditioning systems, the thermostat is a core protective device ensuring the safe operation of the heater. By monitoring the surface temperature of the heater and controlling the on / off state of the circuit, its reliability directly affects the operational safety of the entire vehicle's air conditioning system. Traditional automotive air conditioning thermostats typically employ a single protector structure connected in series in the control circuit; for example, a bimetallic strip protector is installed on the heater surface to sense temperature changes, and the bimetallic strip drives the metal contacts to open and close, thereby monitoring the heater temperature.

[0003] The protector operates in an environment subject to severe vibration, humidity changes, and temperature shocks within the automotive air conditioning system. The protector contacts are susceptible to oxidation, contamination, or mechanical deformation, leading to increased contact resistance or even complete failure. Especially in low-voltage signal control scenarios, minute changes in the contact resistance of the protector contacts can easily cause signal transmission interruptions. If a single protector contact becomes poorly contacted due to oxidation, contamination, or mechanical wear, it will directly cause temperature control failure, preventing the air conditioning system from operating normally. Utility Model Content

[0004] The purpose of this invention is to provide a waterproof thermostat for automotive air conditioning, addressing the shortcomings of existing technologies.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A waterproof thermostat for automotive air conditioning includes a housing, a protector, a first lead, and a second lead. At least two protectors are arranged side by side inside the housing. Multiple protectors are connected to the first lead and the second lead, and are respectively connected in parallel to the control circuit through the first lead and the second lead.

[0007] Furthermore, the protector includes a metal base, an insulating base, and a bimetallic strip, wherein the bimetallic strip is disposed within a receiving cavity formed by the metal base and the insulating base, and is electrically connected to the metal base;

[0008] A stationary contact plate is provided on the insulating base, and a moving contact is provided on the bimetallic strip corresponding to the stationary contact plate. The bimetallic strip is electrically connected to the stationary contact plate through the moving contact. The metal base and the stationary contact plate are electrically connected to the first lead and the second lead, respectively.

[0009] Furthermore, the metal base is fixedly connected to the insulating base by a snap-fit ​​structure thereon, and a slot is provided on the insulating base corresponding to the snap-fit ​​structure.

[0010] Furthermore, the bimetallic sheet includes a fixing part and a deformable part, wherein the fixing part is located at one end of the length of the deformable part;

[0011] The fixing part is pressed between the metal base and the insulating base, and the deformable part is located in the receiving cavity.

[0012] Furthermore, a first groove and a second groove are respectively provided on the metal base and the insulating base, and the first groove cooperates with the second groove to form the receiving cavity;

[0013] One end of the stationary contact plate extends into the second groove, and the other end is connected to the second lead wire. The moving contact is located at the end of the deformable part away from the fixed part.

[0014] Furthermore, a boss is provided in the first groove, and the boss is provided corresponding to the middle region of the deformed part.

[0015] Furthermore, the metal base is connected to the first lead via a first terminal, and the stationary contact plate is connected to the second lead via a second terminal;

[0016] The first terminals on the plurality of protectors are all connected through a first conductive plate, and the second terminals on the plurality of protectors are all connected through a second conductive plate.

[0017] Furthermore, a cover is fitted around the outer ring of the metal base and the insulating base.

[0018] Furthermore, a sealing layer is provided at the opening end of the outer casing, the sealing layer comprising a silicone layer and a resin layer;

[0019] The silicone layer covers the outer ring of the first terminal and the second terminal, and the resin layer covers the outer ring of the first lead and the second lead.

[0020] The beneficial effects of this utility model are as follows:

[0021] This application employs a dual-protector parallel design, specifically, at least two protectors are arranged side-by-side within the thermostat housing, both connected to the control circuit in parallel via a first lead and a second lead. This parallel structure ensures that even if one protector experiences poor contact due to contact oxidation, contamination, or mechanical wear, the other protector can still maintain circuit continuity, significantly improving signal transmission reliability under low-voltage conditions and effectively solving the temperature control failure problem caused by poor contact in current thermostats.

[0022] The waterproofing and temperature resistance issues are solved by double sealing. Specifically, silicone is first sealed at the outer shell port to provide a temperature-resistant seal, and then epoxy resin is sealed to fix it and enhance waterproofing. The silicone layer is relatively soft and cannot fix the lead wire. If the lead wire is not fixed, it will damage the silicone layer and easily lead to the failure of the seal. Therefore, a resin layer is added for sealing. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of the waterproof thermostat for vehicle air conditioning in this utility model;

[0025] Figure 2 This is an exploded view of the waterproof thermostat for vehicle air conditioning in this utility model;

[0026] Figure 3 This is a schematic diagram of the structure of the protector in this utility model;

[0027] Figure 4 This is an explosion diagram of the protector in this utility model;

[0028] Figure 5 This is an exploded schematic diagram of the protector in this utility model.

[0029] Reference numerals: 1. Outer shell; 11. Cover; 2. Protector; 21. Metal base; 211. First groove; 212. Boss; 213. Snap-fit ​​structure; 22. Insulating base; 221. Second groove; 222. Slot; 23. Stationary contact plate; 24. Bimetallic strip; 241. Fixing part; 242. Deformation part; 25. Moving contact; 26. Receiving cavity; 3. First lead wire; 31. First terminal; 32. First conductive plate; 4. Second lead wire; 41. Second terminal; 42. Second conductive plate; 5. Sealing layer; 51. Silicone layer; 52. Resin layer. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0031] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0033] like Figures 1 to 5 The vehicle air conditioning waterproof thermostat shown includes a housing 1, a protector 2, a first lead 3 and a second lead 4. At least two protectors 2 are arranged side by side inside the housing 1. Multiple protectors 2 are connected to the first lead 3 and the second lead 4, and are respectively connected to the control circuit in parallel through the first lead 3 and the second lead 4.

[0034] In this embodiment, as Figure 2 As shown, a dual-protector parallel design is adopted. Specifically, at least two protectors 2 are arranged side by side inside the housing 1 of the thermostat, both connected to the control circuit in parallel via a first lead 3 and a second lead 4. The parallel structure ensures that even if a single protector 2 experiences poor contact due to contact oxidation, contamination, or mechanical wear, the other protector 2 can still maintain circuit continuity, significantly improving the reliability of signal transmission under low voltage conditions and effectively solving the problem of temperature control failure caused by poor contact in current thermostats.

[0035] In this embodiment, as Figure 4 and Figure 5 The internal structure of the protector 2 shown includes a metal base 21, an insulating base 22, and a bimetallic strip 24. The bimetallic strip 24 is disposed within the receiving cavity 26 formed by the metal base 21 and the insulating base 22, and is electrically connected to the metal base 21. A stationary contact plate 23 is disposed on the insulating base 22, and a moving contact 25 is disposed on the bimetallic strip 24 corresponding to the stationary contact plate 23. The bimetallic strip 24 is electrically connected to the stationary contact plate 23 through the moving contact 25. The metal base 21 and the stationary contact plate 23 are electrically connected to the first lead 3 and the second lead 4, respectively.

[0036] The protector 2 consists of a metal base 21, an insulating base 22, and a bimetallic strip 24. The bimetallic strip 24 is electrically connected to the stationary contact plate 23 through a moving contact 25. When the bimetallic strip 24 is heated and deformed, it drives the moving contact 25 to separate from the stationary contact plate 23, thus precisely controlling the circuit's on / off state and avoiding the risk of overheating.

[0037] The combination of metal base 21 and insulating base 22 balances thermal conductivity and electrical isolation. Metal base 21 can quickly transfer the surface temperature of the heater, while insulating base 22 prevents the protector 2 from short-circuiting.

[0038] Furthermore, the metal base 21 is fixedly connected to the insulating base 22 via a snap-fit ​​structure 213, and a slot 222 is provided on the insulating base 22 corresponding to the snap-fit ​​structure 213. The metal base 21 and the insulating base 22 are spliced ​​and fixed by the snap-fit ​​structure 213, which firmly fixes the bimetallic strip 24 inside, preventing displacement of internal components caused by vehicle vibration and ensuring the mechanical stability of the protector 2.

[0039] In this embodiment, as Figure 4 and Figure 5 As shown, the bimetallic strip 24 includes a fixing part 241 and a deformable part 242. The fixing part 241 is located at one end of the length of the deformable part 242. The fixing part 241 is pressed between the metal seat 21 and the insulating seat 22, and the deformable part 242 is located in the receiving cavity 26.

[0040] A first groove 211 and a second groove 221 are respectively provided on the metal base 21 and the insulating base 22. The first groove 211 and the second groove 221 cooperate to form a receiving cavity 26. One end of the stationary contact plate 23 extends into the second groove 221, and the other end is connected to the second lead wire 4. The moving contact 25 is provided at the end of the deformable part 242 away from the fixed part 241. A boss 212 is provided in the first groove 211, and the boss 212 is correspondingly provided in the middle area of ​​the deformable part 242.

[0041] The boss 212 provides a deformation fulcrum for the bimetallic strip 24, so that under normal temperature conditions, the bimetallic strip 24, supported by the boss 212, keeps the moving contact 25 located at one end of its length in contact with the stationary contact plate 23, thereby improving the shock resistance of the protector 2 and maintaining the stability of the control circuit conduction state.

[0042] In this embodiment, as Figure 3 As shown, the metal base 21 is connected to the first lead 3 via the first terminal 31, and the stationary contact plate 23 is connected to the second lead 4 via the second terminal 41; the first terminals 31 on the multiple protectors 2 are all connected via the first conductive plate 32, and the second terminals 41 on the multiple protectors 2 are all connected via the second conductive plate 42.

[0043] The first terminals 31 of multiple protectors 2 are connected through the first conductive plate 32, and the second terminals 41 are connected through the second conductive plate 42, so as to realize the parallel conduction of multiple protectors 2.

[0044] In this embodiment, as Figure 2 As shown, a cover 11 is fitted around the outer ring of the metal base 21 and the insulating base 22. A sealing layer 5 is provided at the open end of the outer shell 1. The sealing layer 5 includes a silicone layer 51 and a resin layer 52. The silicone layer 51 covers the outer ring of the first terminal 31 and the second terminal 41, and the resin layer 52 covers the outer ring of the first lead 3 and the second lead 4.

[0045] The cover 11 set on the outer ring of the protector 2 can isolate external mechanical impact and pollution to a certain extent. The silicone sealant is first sealed at the port of the outer shell 1 to provide a temperature-resistant seal, and then epoxy resin is sealed to fix it and enhance the waterproof function. The silicone layer 51 is relatively soft and cannot fix the lead wire. If the lead wire is not fixed, it will damage the silicone layer 51 and easily lead to the failure of the seal. Therefore, the resin layer 52 is added for sealing.

[0046] Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A waterproof thermostat for automotive air conditioning, characterized in that, The application relates to a protection device, which comprises a shell (1), protectors (2), a first lead wire (3) and a second lead wire (4), wherein the protectors (2) are arranged in parallel in the shell (1), the protectors (2) are connected with the first lead wire (3) and the second lead wire (4) respectively, and the protectors (2) are connected in parallel with the first lead wire (3) and the second lead wire (4) through the first lead wire (3) and the second lead wire (4) respectively.

2. The water temperature control device for an air conditioner for a vehicle according to claim 1, wherein The protector (2) comprises a metal base (21), an insulating base (22) and a bimetallic strip (24), the bimetallic strip (24) is arranged in a containing cavity (26) formed by the metal base (21) and the insulating base (22), and the bimetallic strip (24) is electrically connected with the metal base (21); A static contact plate (23) is arranged on the insulating base (22), a dynamic contact head (25) is arranged on the bimetallic strip (24) corresponding to the static contact plate (23), the bimetallic strip (24) is electrically connected with the static contact plate (23) through the dynamic contact head (25), and the metal base (21) and the static contact plate (23) are electrically connected with the first lead wire (3) and the second lead wire (4) respectively.

3. The water temperature control device for an air conditioner for a vehicle according to claim 2, wherein The metal base (21) is fixedly connected with the insulating base (22) through a buckle structure (213) arranged on the metal base (21), and a clamping groove (222) is arranged on the insulating base (22) corresponding to the buckle structure (213).

4. The water temperature control device for an air conditioner for a vehicle according to claim 2, wherein The bimetallic strip (24) comprises a fixed part (241) and a deformation part (242), and the fixed part (241) is located at one end of the deformation part (242) in length. The fixed part (241) is pressed between the metal base (21) and the insulating base (22), and the deformation part (242) is located in the containing cavity (26).

5. The water temperature control device for an air conditioner for a vehicle according to claim 4, wherein First and second recesses (211) and (221) are arranged on the metal base (21) and the insulating base (22) respectively, and the first recess (211) cooperates with the second recess (221) to form the containing cavity (26); One end of the static contact plate (23) extends into the second recess (221), and the other end is connected with the second lead wire (4), and the dynamic contact head (25) is arranged at one end of the deformation part (242) away from the fixed part (241).

6. The water temperature control for an air conditioner for a vehicle according to claim 5, wherein A boss (212) is arranged in the first recess (211), and the boss (212) is arranged corresponding to a middle region of the deformation part (242).

7. The water temperature control for an automotive air conditioner according to claim 2, wherein The metal base (21) is connected with the first lead wire (3) through a first wiring terminal (31), and the static contact plate (23) is connected with the second lead wire (4) through a second wiring terminal (41); The first wiring terminals (31) of the plurality of protectors (2) are connected through a first conductive plate (32), and the second wiring terminals (41) of the plurality of protectors (2) are connected through a second conductive plate (42).

8. The water temperature control for an automotive air conditioner according to claim 2, wherein A cover (11) is sleeved on the outer rings of the metal base (21) and the insulating base (22).

9. The water temperature control device for an air conditioner for a vehicle according to claim 7, wherein A sealing layer (5) is arranged on an open end of the shell (1), and the sealing layer (5) comprises a silica gel layer (51) and a resin layer (52). The silica gel layer (51) is coated outside the first terminal (31) and the second terminal (41), and the resin layer (52) is coated outside the first lead wire (3) and the second lead wire (4).

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