CN217538830U - Multistage heat exchanger device of simulation engine heat transfer environment - Google Patents
Multistage heat exchanger device of simulation engine heat transfer environment Download PDFInfo
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- CN217538830U CN217538830U CN202221596339.9U CN202221596339U CN217538830U CN 217538830 U CN217538830 U CN 217538830U CN 202221596339 U CN202221596339 U CN 202221596339U CN 217538830 U CN217538830 U CN 217538830U
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Abstract
The utility model discloses a multistage heat exchanger device of simulation engine heat transfer environment, include: heat exchanger, multiport valve and trip valve. Through the multi-way valve and the heat exchanger, two cooling water main paths communicated with the cooling water outlet and the cooling water outlet are constructed, and a plurality of cooling water branch paths connected into different heat exchanger heat exchange pipelines of the heat exchanger are constructed to form a plurality of cooling water loops. And then constructing two cooling liquid main paths and a plurality of cooling water branch paths which are connected in series with heat exchange pipelines of different heat exchanger heat exchangers to form a plurality of cooling liquid loops. And the shut-off valve is arranged between the two cooling liquid branches or between the two cooling liquid branches and can connect the heat exchange pipelines of different heat exchangers into the same loop. Through the switching of trip valve and multi-ported valve, according to the demand of different discharge capacity engine heat dissipation simulations, select different heat exchangers to use or a plurality of heat exchangers to use jointly, simple structure, the operation of being convenient for.
Description
Technical Field
The utility model relates to a heat transfer device technical field, concretely relates to multistage heat exchanger device of whole car heat transfer environment of simulation.
Background
The engine heat dissipation simulation is an important component of engine performance testing, and when the engine heat dissipation process is simulated, a proper heat exchanger is often selected to simulate a heat exchange environment according to the requirements of engines with different discharge capacities on heat dissipation simulation. The engine's simulation of the heat exchange environment includes the amount of heat exchange, flow and pressure drop. In the actual operation process, in order to meet the requirements of engines with different displacement on heat exchange environment, the heat exchangers with different heat exchange amounts are often replaced to simulate the heat exchange environment during heat dissipation simulation. The process of changing the heat exchanger for the heat dissipation simulation process of engine, it is comparatively loaded down with trivial details, brought very big inconvenience for the simulation, when inconvenient operation, still can cause the loss by a wide margin in time.
SUMMERY OF THE UTILITY MODEL
Therefore, the to-be-solved technical problem of the utility model lies in overcoming among the prior art when the simulation dispels the heat, for the demand that satisfies the heat dissipation simulation of different discharge capacity engines, often need change the heat transfer environment of the heat exchanger simulation engine of different heat transfer volumes, operates inconveniently to a multistage heat exchanger device of whole car heat transfer environment of simulation is provided.
A multistage heat exchanger device for simulating a whole vehicle heat exchange environment comprises:
the number of the multi-way valves is more than or equal to three;
one multi-way valve is connected with the cooling water inlet to construct a first cooling water main path, and the other multi-way valve is connected with the cooling water outlet to construct a second cooling water main path;
one multi-way valve is connected with a cooling liquid outlet of the engine to form a first cooling liquid main path, and the other multi-way valve is connected with a cooling liquid inlet of the engine to form a second cooling liquid main path;
a cooling water branch is constructed between the first cooling water main path and the second cooling water main path through a multi-way valve to form a plurality of cooling water loops;
a cooling liquid branch is constructed between the first cooling liquid main path and the second cooling water main path through a multi-way valve to form a plurality of cooling liquid loops;
the heat exchange pipeline on one side is connected with different cooling water branches, and the heat exchange pipeline on the other side is connected with different cooling liquid branches;
the cutoff valve is arranged on a bypass pipeline for communicating two adjacent cooling liquid branches or two adjacent cooling water branches, one end of the bypass pipeline is communicated with an inlet of one heat exchanger heat exchange pipeline, the other end of the bypass pipeline is communicated with an outlet of the other heat exchanger heat exchange pipeline, and the heat exchange pipelines of different heat exchangers can be connected into one cooling water loop or one cooling liquid loop through the opening and closing of the cutoff valve;
through the switching of multi-ported valve and trip valve, according to the demand of different discharge capacity engines to the heat dissipation simulation, select required cooling water return circuit and coolant liquid return circuit, carry out the heat transfer through the heat exchanger of different heat transfer volume, perhaps a plurality of heat exchangers carry out the heat transfer jointly.
Preferably, the plurality of heat exchangers include a first heat exchanger and a second heat exchanger, and the heat exchange amount of the second heat exchanger is greater than that of the first heat exchanger;
the multi-way valve is a three-way valve.
Preferably, the device also comprises a butterfly valve;
the butterfly valve includes:
a first butterfly valve arranged on the first cooling water trunk line;
the second butterfly valve is arranged on the second cooling water trunk line;
the third butterfly valve is arranged on the first cooling liquid main path;
and the fourth butterfly valve is arranged on the second cooling liquid main path.
Preferably, the system also comprises a thermometer, a pressure gauge and a flowmeter;
the thermometer and the pressure gauge are arranged on the cooling water branch and are arranged on two sides of the heat exchange pipeline of the heat exchanger;
the thermometer and the pressure gauge are arranged on the first cooling liquid main path and are arranged between the third butterfly valve and the multi-way valve;
the thermometer and the pressure gauge are arranged on the second cooling liquid main path and are arranged between the fourth butterfly valve and the multi-way valve;
the flowmeter is arranged on the second cooling liquid main line and is arranged between the fourth butterfly valve and the multi-way valve.
Preferably, the device also comprises a water tank;
the bottom surface of the water tank is connected with a water drain gate to construct a liquid drain branch;
the top surface of the water tank is provided with an automatic air release valve;
and one side surface of the water tank is connected with the first cooling liquid main path and is connected with one section of the first cooling liquid main path between the third butterfly valve and the multi-way valve to construct a liquid feeding branch.
Preferably, the device further comprises an electric proportional valve;
the electric proportional valve is provided with three valves;
the electric proportional valve is arranged on the second cooling water trunk, is connected with the first cooling water trunk through a first bypass branch and is communicated with a section of cooling water trunk between the first butterfly valve and the multi-way valve;
a cooling liquid outlet of the engine is provided with a temperature measuring point;
and the electric proportional valve adjusts the flow of the cooling water in the cooling water loop through the feedback of the temperature measuring point.
Preferably, a bypass valve is further included;
the bypass valve is arranged on the second bypass branch;
one end of the second bypass branch is connected with a water inlet of the cooling water, and the other end of the second bypass branch is connected with a water outlet of the cooling water;
the bypass valve is used to equalize the pressure of the further cooling water.
Preferably, the cooling water system further comprises a filter which is Y-shaped and is arranged on the first cooling water trunk line.
Has the advantages that: the utility model discloses a many coolant water return circuits and many coolant liquid return circuits through different heat exchanger heat transfer pipeline have been found in the setting of multi-ported valve, through the setting of diverter valve, can insert a coolant water return circuit or a coolant liquid return circuit with the heat transfer pipeline of different heat exchangers. Need not to change the heat exchanger, only need control the valve of multi-ported valve and trip valve, can select different heat exchangers or a plurality of heat exchangers to work jointly. According to the needs of different engine heat dissipation simulations, select suitable heat exchanger work, perhaps a plurality of heat exchangers work jointly, simple structure, convenient operation.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic view of a connection structure according to an embodiment of the present invention.
Description of reference numerals:
101. a first heat exchanger; 102. a second heat exchanger; 2. a three-way valve; 3. a shut-off valve; 4. an engine; 5. a water tank; 6. a water discharge gate; 7. an electrically operated proportional valve; 8. a bypass valve; 9. a pressure gauge; 10. a thermometer; 11. a flow meter; 12. a butterfly valve; 13. an automatic air release valve; 14. and (3) a filter.
Detailed Description
The technical solutions of the present invention will be described more clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Furthermore, the technical features mentioned in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.
Example 1
As shown in fig. 1, a multistage heat exchanger device for simulating a heat exchange environment of a whole vehicle includes:
the number of the multi-way valves is more than or equal to three.
One multi-way valve is connected with the cooling water inlet to construct a first cooling water main path, and the other multi-way valve is connected with the cooling water outlet to construct a second cooling water main path.
One multi-way valve is connected with a cooling liquid outlet of the engine 4 to construct a first cooling liquid main path, and the other multi-way valve is connected with a cooling liquid inlet of the engine 4 to construct a second cooling liquid main path.
And a cooling water branch is constructed between the first cooling water main path and the second cooling water main path through the multi-way valve to form a plurality of cooling water loops.
A plurality of cooling liquid branch circuits are constructed between the first cooling liquid main circuit and the second cooling water main circuit through the multi-way valve, and a plurality of cooling liquid loops are formed.
A plurality of heat exchangers. And a heat exchange pipeline on one side of the heat exchanger is connected to the cooling water branch, and a heat exchange pipeline on the other side of the heat exchanger is connected to the cooling liquid branch. And the heat exchange pipelines of the two heat exchangers are not connected to the same cooling water branch or cooling liquid branch.
And the stop valve 3 is arranged on a bypass pipeline used for communicating two adjacent cooling liquid branches or two adjacent cooling water branches, one end of the bypass pipeline is communicated with an inlet of one heat exchanger heat exchange pipeline, the other end of the bypass pipeline is communicated with an outlet of the other heat exchanger heat exchange pipeline, and the heat exchange pipelines of different heat exchangers can be connected into one cooling water loop or one cooling liquid loop through the opening and closing of the stop valve 3.
Through the switching of multi-ported valve and trip valve, according to the demand of different discharge capacity engines to the heat dissipation simulation, select required cooling water return circuit and coolant liquid return circuit, carry out the heat transfer through the heat exchanger of different heat transfer volume, perhaps a plurality of heat exchangers carry out the heat transfer jointly.
In this embodiment, through the setting of multi-ported valve, found many cooling water return circuits and many coolant liquid return circuits through different heat exchanger heat transfer pipelines, through the setting of trip valve 3, can insert a cooling water return circuit or a coolant liquid return circuit with the heat transfer pipeline of different heat exchangers. Need not to change the heat exchanger, only need control the valve of multi-ported valve and trip valve 3, can select different heat exchangers or a plurality of heat exchangers to work jointly. According to the needs of different engine heat dissipation simulations, select suitable heat exchanger work, perhaps a plurality of heat exchangers work jointly, simple structure, convenient operation.
The heat exchanger comprises a first heat exchanger 101 and a second heat exchanger 102, and the heat exchange quantity of the second heat exchanger 102 is larger than that of the first heat exchanger. The first heat exchanger 101 meets the heat exchange simulation requirement of a small-displacement engine, the second heat exchanger 102 meets the heat exchange simulation requirement of a large-displacement engine, and the first heat exchanger 101 and the second heat exchanger 102 are used in series to meet the heat dissipation simulation requirement of the large-displacement engine.
The heat exchange pipelines on one sides of the first heat exchanger 101 and the second heat exchanger 102 are connected in parallel through a three-way valve 2 to form two cooling water branches, and the heat exchange pipelines on the other side are connected in parallel through the three-way valve 2 to form two cooling liquid branches.
And three-way valves 2 at two ends of the cooling water branch are respectively connected with a cooling water inlet and a cooling water outlet to form two cooling water main paths.
And three-way valves 2 at two ends of the cooling liquid branch are connected with a cooling liquid inlet of the engine 4 and a cooling liquid outlet of the engine 4 to form two cooling liquid main paths.
One or two of the two cooling liquid branches are selected to work through the opening and closing of the three-way valve 2, and whether the two cooling liquid branches are connected for heat exchange is selected through the opening and closing of the stop valve 3.
The three-way valve 2 is a multi-way valve, and the number of branches in a loop can be correspondingly increased by increasing the number of valves.
In this embodiment, the quantity of cooling water return circuit and coolant liquid return circuit has greatly been reduced in the setting of three-way valve and two different capacity heat exchangers. One of the two heat exchangers can meet the requirement of heat exchange simulation of a small-displacement engine, the other one can meet the requirement of heat exchange simulation of a medium-displacement engine, the two heat exchangers are jointly used to meet the requirement of heat exchange simulation of a large-displacement engine, and meanwhile, the three-way valves and the cut-off valves 3 are small in number and convenient to operate.
A butterfly valve 12 is also included. The butterfly valve 12 includes:
and the first butterfly valve is arranged on the first cooling water trunk line.
And the second butterfly valve is arranged on the second cooling water trunk line.
And the third butterfly valve is arranged on the first cooling liquid main path.
And the fourth butterfly valve is arranged on the second cooling liquid main path.
In this embodiment, the four butterfly valves 12 are identical. The opening and closing of the butterfly valve 12 is used for controlling the movement of the cooling water and the cooling liquid in the loop. Meanwhile, the butterfly valve 12 is arranged, so that the connecting pipeline in the adjusting device is convenient to adjust, various parts are convenient to replace, and the device is convenient to use.
Also included are a thermometer 10, a pressure gauge 9, and a flow meter 11.
The thermometer 10 and the pressure gauge 9 are arranged on the cooling water branch and are arranged on two sides of the heat exchange pipeline of the heat exchanger.
The thermometer 10 and the pressure gauge 9 are arranged on the first cooling liquid main path and are arranged between the third butterfly valve and the multi-way valve.
And the thermometer 10 and the pressure gauge 9 are arranged on the second cooling liquid main path and are arranged between the fourth butterfly valve and the multi-way valve.
The flowmeter 11 is arranged on the second cooling liquid main line and between the fourth butterfly valve and the multi-way valve.
In this embodiment, the thermometer 10, the pressure gauge 9 and the flowmeter 11 are arranged so as to facilitate observation of the temperature and pressure changes of the cooling water and the cooling liquid during the heat exchange process, and to facilitate observation of data during observation of the flow rate change of the cooling liquid during the heat exchange process.
A water tank 5 is also included.
The bottom surface of the water tank 5 is connected with a water drain gate 6 to construct a liquid drain branch.
The top surface of the water tank 5 is provided with an automatic air release valve 13.
One side of the water tank 5 is connected with the first cooling liquid main path and is connected with one section of the first cooling liquid main path between the third butterfly valve and the multi-way valve to construct a liquid feeding branch.
In this embodiment, the water tank 5 and the drain gate 6 are provided to facilitate the regulation of the amount of the coolant in the coolant circuit, and the automatic air release valve 13 is provided to prevent the device from being damaged due to the excessive pressure of the coolant in the coolant circuit.
Also included is an electrically operated proportional valve 7.
The electric proportional valve 7 is provided with three valves.
The electric proportional valve 7 is arranged on the second cooling water trunk, is connected with the first cooling water trunk through a first bypass branch, and is communicated with one section of cooling water trunk between the first butterfly valve and the multi-way valve.
A cooling liquid outlet of the engine 4 is provided with a temperature measuring point.
Through the feedback of the temperature measuring point, the electric proportional valve 7 adjusts the flow of the cooling water in the cooling water loop.
In this embodiment, the arrangement of the electric proportional valve 7 and the temperature measuring point facilitates the regulation of the flow rate of the cooling water according to the coolant outlet temperature of the engine 4, which is beneficial to the implementation of the heat dissipation simulation process.
A bypass valve 8 is also included.
A bypass valve 8 is provided on the second bypass branch.
One end of the second bypass branch is connected with a water inlet of the cooling water, and the other end of the second bypass branch is connected with a water outlet of the cooling water;
the bypass valve 8 is used to equalize the pressure of the further cooling water.
The first cooling water trunk is also provided with a filter 14, and the filter 14 is Y-shaped and used for filtering cooling water.
The heat exchange simulation was performed by the apparatus described above.
The heat exchange simulation process of the heat exchange device comprises the following steps:
first, the amount of heat exchange, pressure drop requirements, and inlet-outlet pressure ranges of the engine 4 are identified.
In the test process, the heat exchange quantity, the maximum allowable pressure drop and the water inlet and outlet pressure ranges under the rated power of the engine 4 are firstly confirmed and tested, and the circulation pipelines of cooling liquid and cooling water are primarily selected by comparing with the multistage heat exchanger device to be used as a basis for next checking calculation.
And then, checking and calculating the flow, the heat exchange quantity and the pressure drop of the heat exchanger.
Checking the flow of the heat exchanger: and determining whether the engine 4 belongs to a small displacement engine, a medium displacement engine or a large displacement engine according to the heat exchange quantity of the engine 4 under the rated power, and selecting a proper heat exchange simulation process. The heat exchange simulation process comprises a primary heat dissipation process, a secondary heat dissipation process and a tertiary heat dissipation process.
Checking the heat exchange quantity: checking the heat exchange condition by utilizing Cm (T) Go out -T Into )＝λA(T Cooling water outlet -T Cooling water inlet )，T Go out Is the temperature, T, of the liquid outlet of the engine Into Is the inlet liquid temperature, T, of the inlet liquid of the engine Cooling water outlet Is the temperature, T, of the cooling water after passing through the heat exchanger Cooling water is introduced For cooling, the temperature before entering the heat exchanger, λ is the heat exchange coefficient, a is the heat exchanger pipe area, C is the constant pressure specific heat capacity of the coolant, and m is the mass flow rate of the coolant, which can be measured using the flow meter 11.
Checking the pressure drop of the pipeline:
1. calculating average flow velocity of pipeline
2. Reynolds number determination
The data provided by the heat exchanger manufacturer is that the dynamic viscosity of the cooling water inlet is mu Go into ＝0.981cP；μ Go out =0.767cP; the density of the cooling water is rho =995.5kg/m 3 。
3. Judging the flow state and calculating the on-way resistance coefficient lambda
Can be obtained by searching the correlation chart by Reynolds number.
4. Calculating the on-way pressure loss Delta P Edge of
L Into Is the length, lambda, of the water inlet pipe Into In order to calculate the coefficient for the on-way resistance,
v is the kinematic viscosity of the medium (m) 2 /s)。
5. Calculating the local pressure loss Δ P Office And Δ P Trade And total Δ P = Δ P Edge of +ΔP Office +ΔP Changeable pipe
Then, the manual adjustment three-way valve 2 and the butterfly valve 13 are adjusted, the target temperature is set, and the proportional feedback closed-loop control is performed.
And determining a final heat exchange pipeline according to the checked heat exchange quantity, the checked pressure drop of the pipeline and the checked flow capacity, and corresponding to switching valves of large, medium and small engines according to different heat exchange requirements by changing a manual three-way valve and a cascade butterfly valve. Meanwhile, PID parameters of the electric proportional valve 7 are adjusted, and closed-loop feedback control is carried out to achieve simulated heat dissipation of the whole engine.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.
Claims (8)
1. A multi-stage heat exchanger device for simulating the heat dissipation environment of an engine, comprising:
the number of the valves is more than or equal to three;
one multi-way valve is connected with the cooling water inlet to construct a first cooling water main path, and the other multi-way valve is connected with the cooling water outlet to construct a second cooling water main path;
one multi-way valve is connected with a cooling liquid outlet of the engine (4) to construct a first cooling liquid main path, and the other multi-way valve is connected with a cooling liquid inlet of the engine (4) to construct a second cooling liquid main path;
a cooling water branch is constructed between the first cooling water main path and the second cooling water main path through a multi-way valve to form a plurality of cooling water loops;
a cooling liquid branch is constructed between the first cooling liquid main path and the second cooling water main path through a multi-way valve to form a plurality of cooling liquid loops;
the heat exchange pipeline on one side is connected with different cooling water branches, and the heat exchange pipeline on the other side is connected with different cooling liquid branches;
the cutoff valve (3) is arranged on a bypass pipeline for communicating two cooling liquid branches or two cooling water branches, one end of the bypass pipeline is communicated with an inlet of one heat exchanger heat exchange pipeline, the other end of the bypass pipeline is communicated with an outlet of the other heat exchanger heat exchange pipeline, and the heat exchange pipelines of different heat exchangers can be connected into one cooling water loop or one cooling liquid loop through the opening and closing of the cutoff valve (3);
through the switching of multi-ported valve and trip valve, according to the demand of different discharge capacity engines to the heat dissipation simulation, select required cooling water return circuit and coolant liquid return circuit, carry out the heat transfer through the heat exchanger of different heat transfer volume, perhaps a plurality of heat exchangers carry out the heat transfer jointly.
2. The multistage heat exchanger device simulating the heat dissipation environment of the engine as recited in claim 1, wherein the plurality of heat exchangers comprises a first heat exchanger (101) and a second heat exchanger (102), and the second heat exchanger (102) has a larger heat exchange amount than the first heat exchanger (101);
the multi-way valve is a three-way valve (2).
3. The multistage heat exchanger device for simulating the heat dissipation environment of an engine according to claim 1, further comprising a butterfly valve (12);
the butterfly valve (12) comprises:
a first butterfly valve disposed on the first cooling water trunk;
the second butterfly valve is arranged on the second cooling water trunk line;
the third butterfly valve is arranged on the first cooling liquid main path;
and the fourth butterfly valve is arranged on the second cooling liquid main path.
4. The multistage heat exchanger device for simulating the heat dissipation environment of the engine as recited in claim 3, further comprising a thermometer (10), a pressure gauge (9), and a flow meter (11);
the thermometer (10) and the pressure gauge (9) are arranged on the cooling water branch and are arranged on two sides of the heat exchange pipeline of the heat exchanger;
the thermometer (10) and the pressure gauge (9) are arranged on the first cooling liquid main path and are arranged between the third butterfly valve and the multi-way valve;
the thermometer (10) and the pressure gauge (9) are arranged on the second cooling liquid main path and are arranged between the fourth butterfly valve and the multi-way valve;
and the flowmeter (11) is arranged on the second cooling liquid main path and is arranged between the fourth butterfly valve and the multi-way valve.
5. The multistage heat exchanger device for simulating the heat dissipation environment of the engine as recited in claim 3, further comprising a water tank (5);
the bottom surface of the water tank (5) is connected with a water drain gate (6) to construct a liquid drain branch;
the top surface of the water tank (5) is provided with an automatic air release valve (13);
one side face of the water tank (5) is connected with the first cooling liquid main path and is connected with one section of the first cooling liquid main path between the third butterfly valve and the multi-way valve, and a liquid adding branch is constructed.
6. The multistage heat exchanger device for simulating the heat dissipation environment of the engine as recited in claim 3, further comprising an electric proportional valve (7);
the electric proportional valve (7) is provided with three valves;
the electric proportional valve (7) is arranged on the second cooling water trunk, is connected with the first cooling water trunk through a first bypass branch and is communicated with a section of cooling water trunk between the first butterfly valve and the multi-way valve;
a cooling liquid outlet of the engine (4) is provided with a temperature measuring point;
through the feedback of the temperature measuring point, the electric proportional valve (7) adjusts the flow of the cooling water in the cooling water loop.
7. The multistage heat exchanger device for simulating an engine heat dissipation environment according to any one of claims 1 to 6, further comprising a bypass valve (8);
the bypass valve (8) is arranged on the second bypass branch;
one end of the second bypass branch is connected with a water inlet of the cooling water, and the other end of the second bypass branch is connected with a water outlet of the cooling water;
the bypass valve (8) is used to equalize the pressure of the further cooling water.
8. The multistage heat exchanger device for simulating the heat dissipation environment of the engine as recited in claim 1, further comprising a filter (14) in a Y shape disposed on the first cooling water trunk.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221596339.9U CN217538830U (en) | 2022-06-24 | 2022-06-24 | Multistage heat exchanger device of simulation engine heat transfer environment |
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| CN202221596339.9U CN217538830U (en) | 2022-06-24 | 2022-06-24 | Multistage heat exchanger device of simulation engine heat transfer environment |
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