Multi-channel double-wax-coated thermostat

Abstract

The invention discloses a multi-channel double-wax-package thermostat, and relates to the technical field of thermostats, the multi-channel double-wax-package thermostat further comprises two shells with a plurality of flow channels and rotary opening and closing wax packages used for controlling flow paths of the flow channels, each shell is internally provided with one rotary opening and closing wax package, and the shells are connected with different water paths. According to the thermostat, firstly, the shell is additionally arranged, the wax bags are arranged in the shell, the thermostat can automatically adjust different water way switches by changing the opening and closing temperatures of the different wax bags, meanwhile, the wax bags are structurally improved, opening and closing of the wax bags are changed into rotating starting from existing up-down starting, and the temperature of the wax bags is changed into rotating starting. The influence caused by adhesion can be reduced through rotation starting, meanwhile, self-grinding can be conducted between the valve clack and the valve seat through rotation so that surface attachments can be removed, meanwhile, linear motion can be conducted normally, and therefore it is guaranteed that the valve clack can be opened and closed normally.

Description

Technical Field

[0001] The present invention relates to the technical field of thermostats, and particularly to a multi-channel double wax package type thermostat. Background Art

[0002] The wax package thermostat is a traditional thermal sensitive element designed based on the phase change characteristics of wax, and is widely used in the cooling system of fuel vehicles to accurately control the engine coolant circulation mode.

[0003] With the increasing innovation of technology, the demand for hybrid vehicles is increasing. Hybrid vehicles have both an engine of a traditional fuel vehicle and a generator of a new energy vehicle. Therefore, this type of vehicle requires two channels for cooling respectively. For the traditional single wax package thermostat, the water passage is limited and cannot meet the heat dissipation requirements of the current plug-in hybrid or range-extended vehicle's fuel-electric double system; Moreover, for the existing wax package thermostats, the valve flap inside is mainly driven by the phase change of wax to move up and down, so as to control the opening and closing of the valve, enabling the coolant inside to selectively perform large cycle cooling and small cycle cooling. During use, relatively inferior coolant may have impurity deposition. At this time, affected by the accumulation of impurities, when the valve flap of the wax package closes, due to the rough and uneven sealing surface, the sealing will not be tight, thus affecting the normal cooling cycle flow. At the same time, many existing driving habits will result in the vehicle being idle for a long time. When the valve flap and valve seat in the wax package thermostat do not perform relative movement for a long time, sticking will also occur due to reasons such as material aging, impurity deposition, and lubrication failure, resulting in the valve opening and closing being stuck or the seal failing. At this time, when starting initially, the up-and-down manner may cause difficulties in opening and closing. Summary of the Invention

[0004] The technical solution of the present invention provides a solution significantly different from the prior art for the technical problem that the prior art solution is too single. The embodiment of the present invention provides a multi-channel double wax package type thermostat to solve the technical problem that the existing thermostat may have sticking or deposition on the sealing surface due to the limitation of its movement state or the driving habits of the driver, thus affecting the opening and closing.

[0005] The embodiment of the present invention adopts the following technical solution: A multi-channel double wax package type thermostat further includes two shells each having a plurality of flow channels, and a rotary opening and closing wax package for controlling the flow path of the flow channels. One rotary opening and closing wax package is arranged in each shell, and each shell is connected to a different water path. The rotary opening and closing wax package includes a sleeve and a guide tube. A connecting frame for fixing the position of the rotary opening and closing wax package is arranged in the shell. A return spring is arranged between the sleeve and the connecting frame, and the sleeve and the guide tube are slidably connected.

[0006] Furthermore, the rotary opening and closing wax packs in the two shells are made of paraffin fillers with different expansion temperatures.

[0007] Furthermore, a guide block is provided outside the guide tube, and a lower guide ring, an upper guide ring and a matching column are provided on the guide tube in sequence from bottom to top, a vertical guide block is provided between the lower guide ring and the upper guide ring, a connecting spring is provided between the upper guide ring and the matching column, and the matching column and the guide tube are slidingly connected, a guide partition block is provided in the lower guide ring, guide balls are provided on the upper and lower surfaces of the inner surface of the sleeve, the lower guide ball is located in the lower guide ring in an initial state, and the upper guide ball is located in the guide groove.

[0008] Furthermore, the angle between the guide partition block and the lower guide ball is 180°.

[0009] Furthermore, the guide groove is spiral, and the spiral angle is 360°, and the inclination angle of the spiral groove is greater than 70°.

[0010] Furthermore, the outer wall of the upper guide ring contacts the inner surface of the sleeve, and the paraffin filling material is located between the upper guide ring and the sleeve.

[0011] Compared with the prior art, the beneficial effects of the present invention are: First, two shells are used, each with a wax bag built in. The opening temperatures of the two wax bags are different to adjust the opening and closing of different water channels, solving the problem that the traditional single wax bag thermostat cannot meet the growing automotive industry. Multiple channels are integrated into one, and the water channels are intelligently adjusted to dissipate heat for the car. Secondly, the existing up and down start is changed to rotation start. First, it will rotate a certain angle when starting. If adhesion occurs, from the perspective of force, it will be opened at an inclined angle, which will cause an oblique pulling effect on the connection. It is easier to open by rotating and twisting than by direct pulling (twisting: applying torque, which is converted into shear force at the contact point and locally distributed radial force. Therefore, shear force is more likely to destroy the bonding structure and achieve separation). In the process of rotation, the surface can also be rubbed to remove residues. After rotating to a certain angle, it will move linearly to ensure that the wax bag can drive the valve disc to start normally. At the same time, after moving to the end, it will also rotate by a certain angle to achieve a scratching effect. In other words, the valve disc can rotate and move linearly. The rotation reduces the impact of adhesion, so that the valve disc and the valve seat can be self-grinded to remove surface attachments. The linear motion can move the valve disc up and down to ensure the normal opening and closing of the thermostat. In summary, the thermostat first sets an additional housing and a wax package inside the housing. By changing the opening and closing temperatures of different wax packages, the thermostat can automatically adjust different waterway switches. At the same time, the structure of the wax package is improved. The opening and closing of the wax package is changed from the existing up-and-down start to a rotational start. The rotational start can not only reduce the influence caused by sticking, but also the rotation can perform self-grinding between the valve flap and the valve seat to remove surface attachments, and at the same time, it can move linearly normally, so as to ensure that the valve flap can open and close normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0013] Figure 1 is a schematic diagram of the main structure of the present invention; Figure 2 is a schematic cross-sectional view of the main structure of the present invention; Figure 3 is a comparison schematic diagram of the single-valve-flap wax package and the double-valve-flap wax package of the present invention; Figure 4 is a schematic diagram of the internal structure of the wax package of the present invention; Figure 5 is a schematic diagram of the split structure of the sleeve and the mating column of the present invention; Figure 6 is a schematic cross-sectional view of the mating column of the present invention.

[0014] Reference numerals: 1, housing; 11, flow channel; 2, rotary opening and closing wax package; 21, connecting frame; 22, return spring; 23, valve flap; 24, sleeve; 25, guiding ball; 26, guiding tube; 27, guiding groove; 28, mating column; 29, connecting spring; 210, upper guiding ring; 211, guiding block; 212, lower guiding ring; 213, vertical guiding block; 214, guiding partition plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention.

[0016] The components of the embodiments of the present invention that are typically depicted and shown in the accompanying drawings herein can be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention.

[0017] Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present invention.

[0018] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0019] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "mounted", "connected", and "coupled" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] As shown below in conjunction with Figures 1 to 6 The embodiments of the present invention provide a multi-channel double-wax-pack thermostat, which further includes a housing 1 having two or more flow channels 11, and a rotary on-off wax pack 2 for controlling the flow path of the flow channels 11. One rotary on-off wax pack 2 is provided in each housing 1, and each housing 1 is connected to a different water circuit. The rotary on-off wax pack 2 includes a sleeve 24 and a guide tube 26. A connecting frame 21 for fixing the position of the rotary on-off wax pack 2 is provided in the housing 1. A return spring 22 is provided between the sleeve 24 and the connecting frame 21, and the sleeve 24 and the guide tube 26 are slidably connected.

[0021] During operation, in a hybrid or range-extended electric vehicle, an engine and a motor are often provided simultaneously. Therefore, it is necessary to provide two heat dissipation pipelines with different circulation paths, and the wax packs connected to the engine and the motor respectively have different starting temperatures. Therefore, they can be started separately, so as to change the cooling cycle according to different heat dissipation requirements.

[0022] Specifically, the rotary opening and closing wax packages 2 in the two housings 1 are filled with paraffin with different expansion temperatures.

[0023] During operation, during use, n-docosane and n-octacosane can be selected respectively. The melting point of n-docosane is relatively low (about 25 - 30 °C), and the melting point of docosane and n-octacosane is relatively high (about 50 - 60 °C), so that different wax packages can react at different temperatures, and the water passage in the thermostat can adjust the flow channel 11 according to different situations.

[0024] Specifically, a guide block 211 is arranged outside the guide pipe 26. The guide pipe 26 is successively provided with a lower guide ring 212, an upper guide ring 210 and a mating column 28 from bottom to top. A vertical guide block 213 is arranged between the lower guide ring 212 and the upper guide ring 210. A connecting spring 29 is arranged between the upper guide ring 210 and the mating column 28. The mating column 28 and the guide pipe 26 are slidably connected. A guide partition block is arranged in the lower guide ring 212. Guide balls 25 are arranged on the upper and lower inner surfaces of the sleeve 24. The lower guide ball 25 is initially located in the lower guide ring 212, and the upper guide ball 25 is located in the guide groove 27.

[0025] Specifically, the angle between the guide partition block and the lower guide ball 25 is 180°.

[0026] During operation, at the initial start-up, the valve flap 23 can rotate 180° around its own axis, so as to produce an oblique pulling effect and reduce the influence caused by adhesion. When the sleeve 24 rotates 180°, the guide partition block can limit the subsequent rotation of the sleeve 24 at this time, so that the sleeve 24 moves upward under the action of the mating column 28. The guide partition block in the upper guide ring 210 and the guide partition plate 214 of the lower guide ring 212 face in opposite directions, so that after moving into the upper guide ring 210, it can continue to rotate around the original set angle, so that the sleeve 24 can actually rotate one circle by using the upper guide ring 210, the lower guide ring 212 and the guide partition plate 214 therein, and the rotation angle in different guide rings is limited.

[0027] Specifically, the guide groove 27 is spiral, the spiral angle is 360°, and the inclination angle of the spiral groove is greater than 70°.

[0028] During operation, since the sleeve 24 and the mating column 28 are in indirect contact through the guide ball 25, when the mating column 28 rises, the inclination angle of the spiral groove is relatively large at this time, which can reduce the force required for rising. Secondly, under the action of the spiral groove, the sleeve 24 can rotate. It should be noted that at this time, the valve flap 23 will rotate. Therefore, the reset spring 22 outside the valve flap 23 is also not fixedly connected, that is, rotatably connected, to ensure normal use.

[0029] Specifically, the outer wall of the upper guide ring 210 contacts the inner surface of the sleeve 24, and the paraffin filling material is located between the upper guide ring 210 and the sleeve 24.

[0030] During operation, by restricting the position where the paraffin filling material is located, the expansion of the paraffin first drives the movement of the mating column 28, and the movement of the mating column 28 causes the sleeve 24 to move in cooperation.

[0031] Working principle: During use, it is respectively connected to the flow channel 11 of the corresponding housing 1 according to the installation requirements of the heat dissipation pipelines of the double oil systems. Two housings 1 are combined into one thermostat. Different triggering temperatures are selected for the filling materials in the two wax packages. When the filling materials in the wax packages expand, the mating column 28 will be pushed upward. The mating column 28 and the sleeve 24 are connected through the guiding groove 27 and the guiding ball 25, and the guiding groove 27 presents a spiral upward state. When the mating column 28 moves upward, the guiding ball 25 will move in the guiding groove 27, thereby driving the connected sleeve 24 to rotate. At this time, in order to ensure that the sleeve 24 rotates in the initial state, a lower guiding ring 212 and a guiding ball 25 that cooperate with it are also provided at the inner bottom thereof. The guiding ring will assist in restricting the lower guiding ball 25 to ensure that it can only rotate in the initial state. When the sleeve 24 rotates, it will drive the connected valve flap 23 to rotate synchronously. When the initial movement state of the valve flap 23 is rotation, if the valve flap 23 and the valve seat are stuck due to non-starting for a long time, from the perspective of force analysis, when it is opened at an inclined angle, it will have an oblique pulling effect on the connected place. It is easier to open by rotating and twisting than directly pulling, so as to facilitate the initial start of the valve flap 23. And when the valve flap 23 rotates 180°, the guiding partition plate 214 in the lower guiding ring 212 restricts the movement of the guiding ball 25 therein, so that the sleeve 24 cannot rotate, and a groove connected to the vertical guiding block 213 is provided at the lower guiding ring 212, so that the sleeve 24 has the ability to move upward. Although the upper guiding ball 25 in the sleeve 24 is still located in the guiding groove 27 at this time, due to the restriction of the guiding partition plate 214, the upward movement of the mating column 28 will drive the sleeve 24 to rise synchronously, rather than the guiding ball 25 moving in the guiding groove 27. When the sleeve 24 rises, it will drive the valve flap 23 to rise synchronously, so as to separate the valve flap 23 from the valve seat. When the valve flap 23 moves to the upper end, there may be a wax package with a double valve flap 23. Therefore, when the valve flap 23 moves to the upper end, the upper valve flap 23 needs to rotate in order to play a cleaning role. Since the lower guiding ball 25 moves into the upper guiding ring 210, the lower guiding ball 25 has a tendency to drive the sleeve 24 to move. At this time, the mating column 28 will continue to rise, so as to rotate the sleeve 24 180° by using the guiding groove 27. When the upper valve flap 23 is closed with the valve seat, it can be rotated and ground to achieve a self-cleaning effect. During the closing process, similarly, due to better compression of the connecting spring 29, the internal spring will be released first, thereby driving the internal mating column 28 to descend, and then driving the sleeve 24 to reverse and reset.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and 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 invention.

Claims

1. A multi-channel double wax-coated thermostat, characterized in that; It also comprises a housing (1) having two flow channels (11), a rotary opening and closing wax package (2) for controlling the flow path of the flow channels (11), each housing (1) being provided with a rotary opening and closing wax package (2), each housing (1) being connected to a different waterway, the rotary opening and closing wax package (2) comprising a sleeve (24), a guide pipe (26) and a valve flap (23) used in conjunction with the control channel (11), a connecting frame (21) for fixing the position of the rotary opening and closing wax package (2) being provided in the housing (1), a return spring (22) being provided between the valve flap (23) and the connecting frame (21), and the return spring (22) being provided outside the sleeve (24), and the sleeve (24) and the guide pipe (26) being slidably connected.

2. A multi-channel double wax-coated thermostat according to claim 1, characterized in that; The rotary opening and closing wax packs (2) in the two shells (1) are made of paraffin fillers with different expansion temperatures.

3. A multi-channel double wax-coated thermostat according to claim 1, characterized in that; A guide block (211) is arranged outside the guide tube (26), and the guide tube (26) is provided with a lower guide ring (212), an upper guide ring (210) and a matching column (28) in sequence from bottom to top; a vertical guide block (213) is arranged between the lower guide ring (212) and the upper guide ring (210); a connecting spring (29) is arranged between the upper guide ring (210) and the matching column (28); and the matching column (28) and the guide tube (26) are slidably connected; a guide partition plate (214) is arranged in the lower guide ring (212); guide balls (25) are arranged above and below the inner surface of the sleeve (24); the guide balls (25) are divided into an upper guide ball (25) and a lower guide ball (25); the lower guide ball (25) is located in the lower guide ring (212) in an initial state, and the upper guide ball (25) is located in the guide groove (27).

4. A multi-channel double wax-coated thermostat according to claim 3, characterized in that; The angle between the guide partition plate (214) and the lower guide ball (25) is 180°.

5. A multi-channel double wax-coated thermostat according to claim 3, characterized in that; The guide groove (27) is spiral-shaped, and the spiral angle is 360°, and the inclination angle of the spiral groove is greater than 70°.

6. A multi-channel double wax-coated thermostat according to claim 3, characterized in that; The outer wall of the upper guide ring (210) contacts the inner surface of the sleeve (24), and the paraffin filling material is located between the upper guide ring (210) and the sleeve (24).

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