Dual-purpose thermostat assembly for switch and cooling liquid of low-temperature circulating system

Abstract

The invention provides a low-temperature circulation system switch cooling liquid dual-purpose thermostat assembly which comprises a thermostat body, a lower shell and an upper shell, an upper water outlet is formed in the top of the upper shell, the upper shell and the lower shell are fixedly connected together, the thermostat body is installed at the joint of the upper shell and the lower shell, and the thermostat body is connected with the lower shell through a water inlet. A partition plate located below the thermostat body is further arranged in the lower shell, the interior of the lower shell is divided into a water inlet cavity and a water outlet cavity through the partition plate, a first through hole is formed in the position, corresponding to the bottom of the thermostat body, of the partition plate, the thermostat body can block the first through hole, and a lower water outlet is formed in the position, corresponding to the water outlet cavity, of the surface of the lower shell. And a water inlet is formed corresponding to the water inlet cavity. The cooling water tank has the advantages that the cooling water tank is installed on a diesel engine for large engineering machinery, it is guaranteed that the diesel engine works at the proper temperature by controlling a circulation channel between the cooling water tank and the diesel engine in the low-temperature environment, and the problems that the diesel engine is excessively abraded in the low-temperature environment and when the diesel engine is started to operate are solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of thermostats, and in particular relates to a thermostat assembly that can be used as both a switch and a coolant for a low-temperature circulation system. Background Art

[0002] The thermostat that can be used as both a switch and a coolant installed on a diesel engine for construction machinery mainly controls the valve of the coolant flow path of the diesel engine. The thermostat automatically adjusts the amount of water entering the radiator according to the coolant temperature to ensure that the engine works within a suitable temperature range, which can play a role in saving energy consumption. However, after the engine starts in a low-temperature environment, the coolant warms up relatively slowly, and there are disadvantages when the engine works in a cold state: greater wear, increased fuel consumption, and easy carbon deposition. And the thermostat for the high-temperature system of a large construction machinery diesel engine is a spool-type thermostat, which has a high cost and a complex structure. Summary of the Invention

[0003] In view of this, the present invention aims to overcome the above-mentioned deficiencies in the prior art and proposes a thermostat assembly that can be used as both a switch and a coolant for a low-temperature circulation system.

[0004] To achieve the above object, the technical solution of the present invention is realized as follows:

[0005] A thermostat assembly that can be used as both a switch and a coolant for a low-temperature circulation system includes a thermostat body, a lower housing, and an upper housing. An upper water outlet is provided at the top of the upper housing. The upper housing and the lower housing are fixedly connected together. The thermostat body is installed at the connection between the upper housing and the lower housing. A partition is further provided in the lower housing below the thermostat body. The interior of the lower housing is separated into an inlet chamber and an outlet chamber by the partition. A first through hole is provided in the partition corresponding to the bottom of the thermostat body, and the thermostat body can block the first through hole. A lower water outlet is provided on the surface of the lower housing corresponding to the outlet chamber, and an inlet is provided corresponding to the inlet chamber.

[0006] Further, a second through hole is provided at the bottom of the upper housing, and a third through hole with a stop surface is provided on the top of the lower housing corresponding to the second through hole. The thermostat body is installed between the second through hole and the third through hole and separates the second through hole and the third through hole.

[0007] Further, the stop surface faces the second through hole. The upper side of the bracket on the upper part of the thermostat body passes through the second through hole. The circumferential edge at the bottom of the bracket is embedded in the third through hole and is pressed by the bottom of the upper housing, and a sealing ring is provided between it and the third through hole.

[0008] Further, two cross-shaped top beams are fixedly connected to the bracket, and a plurality of uniformly distributed side beams are fixedly connected to the valve seat on the lower part of the thermostat body.

[0009] Further, the first through hole is arranged in a countersunk hole structure, and the pressing plate at the bottom of the thermostat body can be pressed into the first through hole after moving downward.

[0010] Further, the partition plate is in a 7-shaped structure. The lower water outlet is opened at the bottom of the lower shell corresponding to the water outlet cavity, and the water inlet is opened at the bottom of the lower shell corresponding to the water inlet cavity. A water tank is fixedly connected to the bottom of the lower shell. An inlet channel communicating with the water inlet and an outlet channel communicating with the lower water outlet are arranged inside the water tank, and the inlet channel and the outlet channel are arranged separately from each other.

[0011] Compared with the prior art, the present invention has the following advantages:

[0012] The thermostat assembly of the low-temperature circulation system switch coolant dual-purpose of the present invention is installed on a diesel engine for large construction machinery. In a low-temperature environment, by controlling the circulation channel between the cooling water tank and the diesel engine, it ensures that the diesel engine works at an appropriate temperature and avoids problems such as excessive wear when the diesel engine starts and runs in a low-temperature environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0014] Figure 1 is a schematic structural diagram of the thermostat assembly of the low-temperature circulation system switch coolant dual-purpose according to an embodiment of the present invention;

[0015] Figure 2 is Figure 1 a partial enlarged view of part A in

[0016] DESCRIPTION OF THE REFERENCE NUMERALS:

[0017] 1. Thermostat body; 11. Bracket; 12. Top beam; 13. Valve seat; 14. Side beam; 15. Pressing plate; 2. Upper shell; 21. Upper water outlet; 22. Second through hole; 3. Lower shell; 31. Partition plate; 32. Water inlet cavity; 33. Water outlet cavity; 34. Third through hole; 35. First through hole; 36. Water inlet; 37. Lower water outlet; 4. Water tank; 41. Outlet channel; 42. Inlet channel. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0019] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. These are 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. Therefore, it should not be construed as a limitation to the present invention. In addition, terms such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0020] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "mounted", "connected", "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may 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 through specific circumstances.

[0021] The present invention will be described in detail below with reference to the drawings and in conjunction with embodiments.

[0022] As shown in the figure, a thermostat assembly that can be used for both a low-temperature circulation system and a coolant includes a thermostat body 1, a lower housing 3, and an upper housing 2. An upper water outlet 21 is provided at the top of the upper housing 2. The upper housing 2 and the lower housing 3 are fixedly connected together. The thermostat body 1 is installed at the connection between the upper housing 2 and the lower housing 3. A partition 31 located below the thermostat body 1 is further provided inside the lower housing 3. The interior of the lower housing 3 is divided into an inlet chamber 32 and an outlet chamber 33 by the partition 31. A first through hole 35 is provided on the partition 31 corresponding to the bottom of the thermostat body 1, and the thermostat body 1 can block the first through hole 35. A lower water outlet 37 is provided on the surface of the lower housing 3 corresponding to the outlet chamber 33, and an inlet 36 is provided corresponding to the inlet chamber 32.

[0023] A second through hole 22 is provided at the bottom of the upper housing 2. A third through hole 34 with a stop surface is provided at the top of the lower housing 3 corresponding to the second through hole 22. The thermostat body 1 is installed between the second through hole 22 and the third through hole 34 and separates the second through hole 22 and the third through hole 34.

[0024] The rabbet surface faces the second through hole 22. The upper side of the bracket 11 on the upper part of the thermostat body 1 passes through the second through hole 22. The circumferential edge at the bottom of the bracket 11 is embedded in the third through hole 34 and is pressed by the bottom of the upper housing 2, and a sealing ring is provided between it and the third through hole 34.

[0025] Two cross - arranged top beams 12 are fixedly connected to the bracket 11, and a plurality of uniformly distributed side beams 14 are fixedly connected to the valve seat 13 at the lower part of the thermostat body 1, which can strengthen the connection strength of the thermostat body 1. In this embodiment, the top beam 12 and the bracket 11 are of an integrally formed structure, and the valve seat 13 and the side beams 14 are of an integrally formed structure. In this embodiment, the thermostat body 1 adopts a wax - type thermostat body 1, which is a conventional technical means mastered by those skilled in the art, so its specific structure will not be described in detail here.

[0026] The first through hole 35 is set in a counterbore - like structure. After the pressing plate 15 at the bottom of the thermostat body 1 moves down, it can press in the first through hole 35 to block the first through hole 35.

[0027] The partition 31 is of a 7 - shaped structure. The lower water outlet 37 is opened at the bottom of the lower housing 3 corresponding to the water outlet cavity 33, and the water inlet 36 is opened at the bottom of the lower housing 3 corresponding to the water inlet cavity 32. A water tank 4 is fixedly connected to the bottom of the lower housing 3. An inlet channel 42 connected to the water inlet 36 and an outlet channel 41 connected to the lower water outlet 37 are provided inside the water tank 4, and the inlet channel 42 and the outlet channel 41 are arranged separately from each other.

[0028] In this embodiment, the number of thermostat bodies 1 is two, and correspondingly, the number of the first through hole, the second through hole 22, and the third through hole 34 is also two, corresponding to the thermostats one by one.

[0029] In this embodiment, the upper housing 2 and the lower housing 3 are fixedly connected together by a plurality of bolts, and the lower housing 3 and the water tank 4 are also fixedly connected together by a plurality of bolts. Of course, sealing members are provided between the upper housing 2 and the lower housing 3 and between the lower housing 3 and the water tank 4 to seal the joints.

[0030] The working process of this embodiment is as follows:

[0031] The upper water outlet 21 of the thermostat assembly is connected to the cooling water tank. The water outlet passage 41 of the water tank 4 is connected to the water pump, and the water inlet passage 42 is connected to the outlet of the intercooler. The outlet of the cooling water tank is also connected to the water pump, and the outlet of the water pump is connected to the inlet of the intercooler. The circulation mode of the coolant is controlled by the expansion or contraction principle of the wax temperature sensing component in the thermostat body 1. When the coolant temperature is lower than 39 °C, the paraffin in the thermostat body 1 is in a solid state. Under the action of the spring, the main valve near the bracket 11 in the thermostat body 1 closes the passage for the coolant to enter the cooling water tank. That is, at this time, the upper housing 2 and the lower housing 3 are not connected at the thermostat, and the coolant in the lower housing 3 cannot enter the upper housing 2. The coolant returns to the intercooler through the water pump for the small engine cycle, and the temperature rises relatively quickly. When the coolant temperature is higher than 51 °C, the paraffin in the thermostat body 1 is in a liquid state. After the paraffin expands, it overcomes the spring force and moves the main valve downward, and presses the pressure plate 15 (i.e., the auxiliary valve of the thermostat body 1) at the bottom of the valve seat 13 tightly against the first through hole 35. At this time, the passage for the coolant to enter the cooling water tank is opened, and the small cycle passage is closed through the pressure plate 15. That is, the coolant enters the upper housing 2 through the water inlet cavity 32, then enters the cooling water tank through the upper water outlet 21, and the coolant in the lower housing 3 cannot enter the water outlet cavity 33. The coolant returns to the intercooler through the water pump after dissipating heat in the cooling water tank for the large engine cycle. Ensure that the water temperature of the low-temperature water system of the diesel engine is always maintained between 39 °C and 51 °C.

[0032] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A thermostat assembly for a low-temperature circulation system with dual functions of switch and coolant, characterized in that: It includes a thermostat body, a lower shell and an upper shell. An upper water outlet is provided on the top of the upper shell. The upper shell and the lower shell are fixed together. The thermostat body is installed at the connection between the upper shell and the lower shell. A partition is also provided in the lower shell below the thermostat body. The interior of the lower shell is divided into a water inlet chamber and a water outlet chamber by the partition. A first through hole is provided on the partition corresponding to the bottom of the thermostat body, and the thermostat body can block the first through hole. A lower water outlet is provided on the surface of the lower shell corresponding to the water outlet chamber, and a water inlet is provided corresponding to the water inlet chamber.

2. A thermostat assembly for low temperature circulation system switch and coolant according to claim 1, characterized in that: A second through hole is opened at the bottom of the upper shell, a third through hole with a stop surface is opened at the top of the lower shell corresponding to the second through hole, and the thermostat body is installed between the second through hole and the third through hole to isolate the second through hole and the third through hole.

3. A thermostat assembly for low temperature circulation system switch and coolant according to claim 2, characterized in that: The stop surface is arranged toward the second through hole, the upper side of the bracket on the upper part of the thermostat body is arranged through the second through hole, the circumferential edge of the bottom of the bracket is embedded in the third through hole and pressed through the bottom of the upper shell, and a sealing ring is arranged between the third through hole.

4. A thermostat assembly for low temperature circulation system switch and coolant according to claim 1, characterized in that: Two cross-arranged top beams are fixedly connected to the bracket, and a plurality of evenly distributed side beams are fixedly connected to the valve seat at the lower part of the thermostat body.

5. The thermostat assembly for low temperature circulation system switch and coolant according to claim 1, characterized in that: The first through hole is configured as a countersunk structure, and the pressure plate at the bottom of the thermostat body can be pressed into the first through hole after being moved downward.

6. The thermostat assembly for low temperature circulation system switch and coolant according to claim 1, characterized in that: The partition has a 7-shaped structure, a lower water outlet is opened at the bottom of the lower shell body corresponding to the water outlet cavity, a water inlet is opened at the bottom of the lower shell body corresponding to the water inlet cavity, a water passing tank is fixedly connected to the bottom of the lower shell body, a water inlet channel connected to the water inlet and a water outlet channel connected to the lower water outlet are arranged inside the water passing tank, and the water inlet channel and the water outlet channel are isolated from each other.

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