CN-122014396-A - Thermostat with pressure regulating function

CN122014396ACN 122014396 ACN122014396 ACN 122014396ACN-122014396-A

Abstract

The invention discloses a thermostat with a pressure regulating function, which comprises an inlet arranged at the top of an outer shell, an upper outlet and a lower outlet arranged at the periphery of the outer shell, a temperature sensing valve core and a blocking cover arranged in the outer shell in a sliding manner, wherein the temperature sensing valve core is positioned above the blocking cover, a guide rod is fixedly connected with the outer shell, the temperature sensing valve core is provided with a liquid through hole and a wax containing hole, the upper end of the guide rod penetrates through the blocking cover and stretches into the wax containing hole to form a wax containing cavity in cooperation with the wax containing hole, paraffin is arranged in the wax containing cavity, the temperature sensing valve core and the blocking cover can move up and down relative to the guide rod, a first elastic piece is arranged between the temperature sensing valve core and the top of the outer shell, a second elastic piece is arranged between the blocking cover and the bottom of the outer shell, and the second elastic piece is sleeved on the guide rod. The positions of the temperature sensing valve core and the blanking cover in the outer shell determine the opening degrees of the upper layer outlet and the lower layer outlet. The thermostat has the functions of temperature saving and pressure regulating, and can protect the cooler when being used in an engine cooling system.

Inventors

LEI KUN
ZHU JIANKUI
Zhang Shuaipei
LONG YANGCHENG
LIU ZONGHUI

Assignees

重庆潍柴发动机有限公司
潍柴重机股份有限公司

Dates

Publication Date: 20260512
Application Date: 20260213

Claims (10)

1. A thermostat with pressure regulating function, characterized in that: The paraffin-containing device comprises an outer shell, wherein an inlet (1) is formed in the top of the outer shell, an upper-layer outlet (2) and a lower-layer outlet (3) are formed in the periphery of the outer shell, a temperature-sensing valve core (4), a blocking cover (5) and a guide rod (6) are arranged in the outer shell, the temperature-sensing valve core (4) is arranged in the outer shell in a sliding manner, the temperature-sensing valve core (4) is positioned above the blocking cover (5), the guide rod (6) is fixedly connected with the outer shell, the temperature-sensing valve core (4) is provided with a liquid through hole (40) and a paraffin-containing hole (420), the upper end of the guide rod (6) penetrates through the blocking cover (5) and stretches into the paraffin-containing hole (420) to form a paraffin-containing cavity in a matching manner, paraffin is arranged in the paraffin-containing cavity, the temperature-sensing valve core (4) and the blocking cover (5) can move up and down relative to the guide rod (6), an elastic piece (7) is arranged between the temperature-sensing valve core (4) and the top of the outer shell, a second elastic piece (8) is arranged between the elastic piece and the second elastic piece (8) and the bottom of the outer shell (8); the positions of the temperature sensing valve core (4) and the blanking cover (5) in the outer shell determine the opening degrees of the upper-layer outlet (2) and the lower-layer outlet (3).
2. The thermostat with pressure regulating function as set forth in claim 1, wherein the side of the temperature sensing valve core (4) is provided with the liquid through port (40) near the blocking cover (5), and the liquid through port (40) is communicated with the upper layer outlet (2) and/or the lower layer outlet (3).
3. The thermostat with pressure regulating function as set forth in claim 2, wherein the temperature sensing valve core 4 comprises an outer baffle ring (41), a wax containing cylinder (42) and a plurality of connecting baffles (43) arranged at intervals, the outer baffle ring (41) is positioned outside the wax containing cylinder (42), the connecting baffles (43) are fixedly connected with the bottom of the outer baffle ring (41) and the outer peripheral wall of the wax containing cylinder (42) respectively, a plurality of liquid through holes (40) are formed among the outer baffle ring (41), the wax containing cylinder (42) and the connecting baffles (43), the bottom of the wax containing cylinder (42) is opened, and the wax containing cylinder (42) is provided with the wax containing holes (420).
4. The thermostat with pressure regulating function as set forth in claim 3, wherein the outer baffle ring (41) is disposed concentrically with the wax containing cylinder (42), a plurality of the connecting baffles (43) are disposed uniformly around the outer circumference of the wax containing cylinder (42), and a plurality of the liquid through holes (40) are disposed uniformly around the center of the outer baffle ring (41) at the bottom of the outer baffle ring (41).
5. The thermostat with pressure regulating function as set forth in claim 4, wherein a plurality of the upper layer outlets (2) are uniformly distributed around the outer circumference of the outer housing, a plurality of the lower layer outlets (3) are uniformly distributed around the outer circumference of the outer housing, and the upper layer outlets (2) are arranged in one-to-one correspondence with the lower layer outlets (3).
6. The thermostat with pressure regulating function as set forth in claim 5, wherein the outer housing includes a valve body (10) and a valve cover (11), the valve cover (11) being detachably and fixedly connected with the bottom of the valve body (10).
7. The thermostat with pressure regulating function as set forth in claim 6, wherein the guide rod (6) comprises a rod body (61) and a rod seat (62), the bottom of the rod body (61) is in threaded connection with the rod seat (62), and the lower end of the rod seat (62) is detachably and fixedly connected with the valve cover (11).
8. The thermostat with pressure regulating function as set forth in claim 7, wherein the valve body (10) has a hexagonal through hole on its top, the hexagonal through hole being the inlet (1).
9. The thermostat with pressure regulating function according to claim 8, wherein the bottom of the valve cover (11) is provided with a mounting operation groove (111), and the mounting operation groove (111) is a hexagon socket.
10. The thermostat with pressure regulating function according to claim 9, wherein the valve body (10) is provided with a mounting structure (101) at an outer peripheral wall near the top, and the mounting structure (101) is provided with an external thread.

Description

Thermostat with pressure regulating function Technical Field The invention relates to the technical field of engine cooling systems, in particular to a thermostat with a pressure regulating function. Background The wax-type thermostat is a temperature-sensitive device which uses the heat expansion and cold contraction characteristics of temperature-sensitive wax (paraffin) to control the on-off or flow of fluid, and is mainly used for an engine cooling system or an engine oil system, and the optimal working temperature of the engine is maintained by adjusting a cooling liquid circulation path. The common wax type thermostat has the working principle that paraffin solidifies and contracts in a low-temperature state (such as cold start), and the valve is closed by spring force. The coolant circulates only slightly inside the engine (without passing through the radiator), accelerating the warm-up. When the paraffin is in a high-temperature state (reaching the set temperature), the paraffin is heated, melted and expanded, and the push rod is pushed to overcome the spring force to open the valve. The coolant enters the large circulation (flowing through the radiator) to prevent the engine from overheating. That is, the conventional wax-type thermostat is closed when it is in a low-temperature environment and is opened when it is in a high-temperature environment. The thermostat does not have a pressure regulating function, and a component with a pressure regulating function is usually arranged in the cooling system of the engine to regulate the pressure of the cooling system. Of course, there are other constructions of wax thermostats that are closed in a high temperature environment and open in a low temperature environment. For example, a thermostat with CN201650435U is disclosed in the patent grant of china, the front casing and the rear casing of the thermostat are fixedly connected through a flange, the sliding block can slide in the inner cavity of the front casing, one end of the spring in the rear casing abuts against the bottom of the rear casing, the other end of the spring passes through the central hole of the flange to abut against the sliding block, the sliding block is movably contacted with the ejector rod, the ejector rod is placed in the paraffin container to be contacted with paraffin, and the paraffin container is fixed through the front casing. At low temperature, paraffin solidifies and contracts, and the sliding block and the inner circular hole of the flange plate form an opening channel for low-temperature fluid to pass through. At high temperature, paraffin expands when being heated and drives the ejector rod to push the sliding block to move towards the flange, the sliding block and the flange are attached to form a seal, and the channel is closed to prevent high-temperature fluid from flowing in. Because the ejector rod receives the pressure of paraffin from the paraffin container very big when high temperature, when working fluid pressure is high, the slider also can not be to the direction displacement of keeping away from the ring flange, and ring flange and slider form sealedly all the time, lead to high-pressure fluid to not follow this thermostat. Because the thermostat does not have the function of adjusting the pressure, if the fluid pressure is too high, the pressure-bearing limit of the thermostat is exceeded, and the thermostat is damaged. Therefore, a pressure relief part must be provided in front of the thermostat to relieve the pressure of the high-pressure fluid. The arrangement of the pressure relief parts can make the arrangement of the engine cooling system pipeline more complex and increase the cost. Disclosure of Invention Aiming at the defects in the prior art, the technical problem to be solved by the invention is to provide the thermostat with the pressure regulating function, which has the functions of temperature saving and pressure regulating and can protect the cooler when being used in an engine cooling system. In order to solve the technical problems, the invention adopts the following technical scheme: A thermostat with a pressure regulating function comprises an outer shell, wherein an inlet is formed in the top of the outer shell, an upper-layer outlet and a lower-layer outlet are formed in the periphery of the outer shell, a temperature sensing valve core, a blocking cover and a guide rod are arranged in the outer shell, the temperature sensing valve core and the blocking cover are arranged in the outer shell in a sliding mode, the temperature sensing valve core is located above the blocking cover, the guide rod is fixedly connected with the outer shell, the temperature sensing valve core is provided with a liquid through hole and a wax containing hole, the upper end of the guide rod penetrates through the blocking cover and stretches into the wax containing hole, the upper end of the guide rod is matched with the wax containing hole to form a wax cont