Temperature control system

Abstract

The application provides a temperature control system, comprising: an inner circulation unit, which provides a heat transfer medium; an outer circulation unit, which controls the temperature of a first controlled device and a second controlled device through a first temperature control pipeline module and a second temperature control pipeline module which can be independently measured and controlled; the first temperature control pipeline module flows the heat transfer medium in a first state, and the second temperature control pipeline module flows the heat transfer medium in a second state. Accordingly, the first controlled device and the second controlled device can be independently controlled in temperature.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of test control, and particularly relates to a temperature control system. BACKGROUND

[0002] In order to reduce pollution and carbon emissions, new energy vehicles are supported by all parties, and various vehicle enterprises are also continuously developing new structure motors and controllers in a favorable environment. The development of various high-power and new structure motors and motor controllers puts forward higher requirements for motor performance test services, especially for the cooling of motors and motor controllers, which directly affects the operating efficiency of the motor.

[0003] In the motor test industry, the conventional cooling method is to use a proportional valve combined with a heat exchanger to directly cool the coolant, and then the coolant is sequentially introduced into the motor and the motor controller in series. There are problems of small temperature control range and inability to control the cooling conditions of the motor and the motor controller separately.

[0004] Chinese patent CN202210492338.8 discloses a motor temperature control method, device and air conditioner, relating to the technical field of air conditioners. The motor temperature control method includes: monitoring the motor temperature of the motor after the motor starts running; wherein the motor is covered with a cooling device; when the motor temperature is greater than or equal to a first preset temperature, the cooling device is controlled to start; the temperature change value of the motor temperature is periodically calculated, and the speed of the motor is controlled based on the temperature change value. The present application can avoid damage caused by high motor temperature, and can also make the motor work at maximum efficiency while ensuring that the temperature does not exceed a certain value, thereby improving the reliability of motor temperature control. This scheme adds a cooling device, which can expand the temperature control range, but the temperature control range is still limited by the cooling capacity of the motor covered with the cooling device, and other structures are added, which changes the test environment and is not conducive to maintaining the singleness of the test environment.

[0005] Chinese patent CN201210057682.0 discloses a temperature control system for a drive motor of an electric vehicle, which includes a drive motor, an electric water pump, a motor radiator, a motor controller, a heater, a pipeline and a control device. The motor controller, drive motor, heater, electric water pump and motor radiator are connected in series through the pipeline to form a circulating passage, and cooling liquid flows in the passage. The control device is arranged between the heater and the drive motor, and controls the operation of the heater as needed. This scheme directly cools the coolant, and then the coolant is sequentially introduced into the motor and the motor controller in series. There are technical problems of small temperature control range and inability to control the cooling conditions of the motor and the motor controller separately.

[0006] The prior art temperature control system has the problems of small temperature control range, high coupling and poor independence. SUMMARY

[0007] The present application needs to solve the technical problem of how to provide a temperature control system capable of realizing independent temperature control of different controlled temperature devices and expanding the temperature control range.

[0008] To solve the above technical problems, the present application provides a temperature control system, which aims to realize independent temperature control of controlled devices and expand the temperature control range.

[0009] To achieve the above purpose, the present application provides a temperature control system, which comprises:

[0010] An inner circulation unit, which provides a heat transfer medium;

[0011] An outer circulation unit, which controls the temperature of a first controlled device and a second controlled device through a first temperature control pipeline module and a second temperature control pipeline module capable of independent measurement and control; the first temperature control pipeline module flows a first state heat transfer medium, and the second temperature control pipeline module flows a second state heat transfer medium.

[0012] Preferably, the inner circulation unit comprises:

[0013] A liquid storage tank, which stores the heat transfer medium;

[0014] A heater, which is arranged at the liquid storage tank, heats the heat transfer medium in the liquid storage tank to a first temperature, and the first temperature is measured by a first temperature sensor and fed back to control the heater;

[0015] An inner circulation pump, which can pump out the heat transfer medium at the first temperature;

[0016] A heat exchanger, the pipeline of the heat transfer medium at the first temperature of the first path of the outlet of the inner circulation pump passes through the heat exchanger, and the heat transfer medium in the first path is changed to heat transfer medium at the second temperature through heat exchange;

[0017] A proportional valve, the first inlet of the proportional valve is connected to the heat transfer medium at the first temperature of the second path pumped directly by the inner circulation pump, the second inlet of the proportional valve is connected to the heat transfer medium at the second temperature passing through the heat exchanger, and the mixed heat transfer medium becomes heat transfer medium at the third temperature after control.

[0018] Preferably, when the first temperature is lower than the set temperature, the heater is started; the heater has an over-temperature protector, when the first temperature measured by the first temperature sensor reaches the maximum allowable temperature, the maximum allowable temperature is set in the controller, and the controller controls the heater to be immediately powered off to stop heating; the first temperature can reach 120℃ at most.

[0019] The heat exchanger uses a cooling circulation module, the temperature of the cooling liquid connected is less than the first temperature, and the temperature of the cooling liquid connected is 7-32 ℃;

[0020] When the first temperature is higher than the set temperature, the controller starts the internal circulation pump, the third temperature of the heat transfer medium at the outlet of the proportional valve flows into the liquid storage tank, and is mixed with the first temperature of the heat transfer medium to become a new first temperature of the heat transfer medium,

[0021] A second temperature sensor is arranged at the outlet of the proportional valve, and a PID control method is used, the temperature value measured by the first temperature sensor and the temperature value measured by the second temperature sensor are used as feedback values, and the set temperature of the heat transfer medium is compared, the opening ratio of the first inlet and the second inlet of the proportional valve is adjusted, the mixing amount ratio of the first heat transfer medium and the second heat transfer medium is controlled, and the cycle is continued until the first temperature reaches the set temperature.

[0022] Preferably, the heater is started first, the temperature is heated to the vicinity of the set temperature, an overshoot amount is allowed, that is, the measured first temperature is allowed to be higher than the set temperature, and then the internal circulation pump is started to finally control the measured first temperature at the set temperature.

[0023] Preferably, the internal circulation unit further comprises:

[0024] A safety valve is arranged at the top of the liquid storage tank, the allowable pressure value of the safety valve can be adjusted, the allowable pressure value of the safety valve is 1-3 bar, when the pressure in the liquid storage tank is higher than the set allowable pressure value, the safety valve is automatically opened to release the pressure; a pressure gauge is arranged at the top of the liquid storage tank to observe the pressure in the liquid storage tank; and a flame arrester is arranged at the top of the liquid storage tank.

[0025] A magnetic flap liquid level meter is arranged at the side of the liquid storage tank, and the liquid level is transmitted to the controller through the transmitter to transmit the liquid level signal to the controller and displayed on the display device connected with the controller;

[0026] A drain valve is arranged in the middle and lower part of the side of the liquid storage tank.

[0027] An internal circulation filter is arranged between the internal circulation pump and the liquid storage tank.

[0028] An internal circulation inlet pressure gauge and an internal circulation outlet pressure gauge are arranged, the internal circulation inlet pressure gauge is arranged between the internal circulation pump and the internal circulation filter, and the internal circulation outlet pressure gauge is arranged at the outlet of the internal circulation pump.

[0029] Preferably, the liquid storage tank is used to store the heat transfer medium at the set temperature; and the internal circulation unit can provide the heat transfer medium to the set temperature.

[0030] The first temperature control pipeline module and the second temperature control pipeline module are connected in parallel to the liquid storage tank.

[0031] The first temperature control pipeline module comprises a first external circulation pump, a first flow meter, a first external circulation temperature sensor, a first external circulation pressure sensor, and a first regulating valve. The first external circulation pump and the first regulating valve are adjusted according to the comparison between the measured values of the first flow meter, the first external circulation temperature sensor, and the first external circulation pressure sensor and the set values in the controller. The first regulating valve returns to the liquid storage tank.

[0032] The second temperature control pipeline module comprises a second external circulation pump, a second flow meter, a second external circulation temperature sensor, a second external circulation pressure sensor, and a second regulating valve. The second external circulation pump and the second regulating valve are adjusted according to the comparison between the measured values of the second flow meter, the second external circulation temperature sensor, and the second external circulation pressure sensor and the set values in the controller. The second regulating valve returns to the liquid storage tank.

[0033] The first external circulation pump and the second external circulation pump are independent of each other, and the first regulating valve and the second regulating valve are independent of each other.

[0034] Preferably, the temperature of the first controlled device and the second controlled device is controlled respectively.

[0035] The first temperature control pipeline module is provided with a first exchanger at the first controlled device. The first external circulation temperature sensor comprises a first external circulation inlet temperature sensor arranged upstream of the first exchanger and a first external circulation outlet temperature sensor arranged downstream of the first exchanger. The first external circulation pressure sensor comprises a first external circulation inlet pressure sensor arranged upstream of the first exchanger and a first external circulation outlet pressure sensor arranged downstream of the first exchanger.

[0036] The second temperature control pipeline module is provided with a second exchanger at the second controlled device. The second external circulation temperature sensor comprises a second external circulation inlet temperature sensor arranged upstream of the second exchanger and a second external circulation outlet temperature sensor arranged downstream of the second exchanger. The second external circulation pressure sensor comprises a second external circulation inlet pressure sensor arranged upstream of the second exchanger and a second external circulation outlet pressure sensor arranged downstream of the second exchanger.

[0037] Preferably, the first temperature control pipeline module further comprises: a first external circulation filter, a first external circulation pump inlet pressure gauge, a first external circulation pump outlet pressure gauge, a first external circulation backflow branch; the outlet of the liquid storage tank is connected in sequence to the first external circulation filter, the first external circulation pump inlet pressure gauge, the first external circulation pump, the first external circulation pump outlet pressure gauge, the first flow meter, the first external circulation inlet pressure sensor or the first external circulation inlet temperature sensor, the first external circulation inlet temperature sensor or the first external circulation inlet pressure sensor, the first exchanger, the first external circulation outlet temperature sensor or the first external circulation outlet pressure sensor, the first external circulation outlet pressure sensor or the first external circulation outlet temperature sensor, the first regulating valve, and backflows to the liquid outlet of the liquid storage tank; the first external circulation backflow branch is arranged between the upstream of the first flow meter and the downstream of the first regulating valve, and the first external circulation backflow control valve is arranged on the first external circulation backflow branch.

[0038] The second temperature control pipeline module further comprises: a second external circulation filter, a second external circulation pump inlet pressure gauge, a second external circulation pump outlet pressure gauge, a second external circulation backflow branch; the outlet of the liquid storage tank is connected in sequence to the second external circulation filter, the second external circulation pump inlet pressure gauge, the second external circulation pump, the second external circulation pump outlet pressure gauge, the second flow meter, the second external circulation inlet pressure sensor or the second external circulation inlet temperature sensor, the second external circulation inlet temperature sensor or the second external circulation inlet pressure sensor, the second exchanger, the second external circulation outlet temperature sensor or the second external circulation outlet pressure sensor, the second external circulation outlet pressure sensor or the second external circulation outlet temperature sensor, the second regulating valve, and backflows to the liquid outlet of the liquid storage tank; the second external circulation backflow branch is arranged between the upstream of the second flow meter and the downstream of the second regulating valve, and the second external circulation backflow control valve is arranged on the second external circulation backflow branch.

[0039] Preferably, the first state comprises a first flow rate and a first pressure; and the second state comprises a second flow rate and a second pressure.

[0040] The first flow rate and the first pressure, and the second flow rate and the second pressure, are respectively independently controlled.

[0041] Preferably, the first flow rate and the first pressure of the heat transfer medium in the first state are controlled by controlling the opening degree of the first regulating valve.

[0042] The second flow rate and the second pressure of the heat transfer medium in the second state are controlled by controlling the opening degree of the second regulating valve.

[0043] Compared with the prior art, the temperature control system provided by the application comprises an inner circulation unit, an outer circulation unit, a first temperature control pipeline module and a second temperature control pipeline module, and the inner circulation unit provides heat transfer medium, the outer circulation unit controls the temperature of the first controlled device and the second controlled device through the first temperature control pipeline module and the second temperature control pipeline module which can be independently measured and controlled, the first state heat transfer medium flows in the first temperature control pipeline module, and the second state heat transfer medium flows in the second temperature control pipeline module. Accordingly, the temperature of the first controlled device and the second controlled device can be independently controlled. BRIEF DESCRIPTION OF DRAWINGS

[0044] Figure 1 The structural schematic diagram of an embodiment of the temperature control system provided by the application.

[0045] Mark explanation:

[0046] 100 inner circulation unit

[0047] 110 liquid storage tank

[0048] 111 heater

[0049] 112 first temperature sensor

[0050] 113 safety valve

[0051] 114 magnetic float liquid level meter

[0052] 115 liquid discharge valve

[0053] 116 pressure gauge

[0054] 117 flame arrester

[0055] 120 inner circulation pump

[0056] 121 first path

[0057] 122 second path

[0058] 123 inner circulation filter

[0059] 124 inner circulation inlet pressure gauge

[0060] 125 inner circulation outlet pressure gauge

[0061] 126 outlet

[0062] 130 heat exchanger

[0063] 131 cooling liquid

[0064] 140 proportional valve

[0065] 141 first inlet

[0066] 142 second inlet

[0067] 143 outlet

[0068] 144 second temperature sensor

[0069] 200 outer circulation unit

[0070] 210 first temperature control line module

[0071] 211 first outer circulation pump

[0072] 212 first flow meter

[0073] 213 first outer circulation inlet temperature sensor

[0074] 214 first outer circulation outlet temperature sensor

[0075] 215 first outer circulation inlet pressure sensor

[0076] 216 first outer circulation outlet pressure sensor

[0077] 217 first regulating valve

[0078] 218 first outer circulation filter

[0079] 219 first outer circulation pump inlet pressure gauge

[0080] 220 first outer circulation pump outlet pressure gauge

[0081] 221 first outer circulation return branch

[0082] 222 first outer circulation return control valve

[0083] 260 second temperature control line module

[0084] 261 second outer circulation pump

[0085] 262 second flow meter

[0086] 263 second outer circulation inlet temperature sensor

[0087] 264 second outer circulation outlet temperature sensor

[0088] 265 second outer circulation inlet pressure sensor

[0089] 266 second outer circulation outlet pressure sensor

[0090] 267 second regulating valve

[0091] 268 second outer circulation filter

[0092] 269 second outer circulation pump inlet pressure gauge

[0093] 270 second outer circulation pump outlet pressure gauge

[0094] 300 first controlled device

[0095] 400 second controlled device

[0096] T1 first temperature

[0097] T2 second temperature

[0098] T3 third temperature. DETAILED DESCRIPTION

[0099] A preferred embodiment of the present application will be described in detail below with reference to the drawings. It should be understood that the present application is not limited to the particular embodiment described above, and that the devices and structures not described in detail should be understood as being implemented in the ordinary way in the art; any person skilled in the art can make many possible changes and modifications to the technical solutions of the present application, or modify them into equivalent embodiments with equivalent changes, without departing from the scope of the technical solutions of the present application, which does not affect the essential content of the present application.

[0100] Referring to Figure 1 As shown in the drawings, the present application provides a temperature control system, comprising: an inner circulation unit 100 and an outer circulation unit 200. The inner circulation unit 100 provides a heat transfer medium, which can be a cooling liquid. The outer circulation unit 200 controls the temperature of a first controlled device 300 and a second controlled device 400 through a first temperature control pipeline module 210 and a second temperature control pipeline module 260, which can be independently measured and controlled. The first temperature control pipeline module 210 flows a first state heat transfer medium, and the second temperature control pipeline module 260 flows a second state heat transfer medium.

[0101] The inner circulation unit 100 comprises: a liquid storage tank 110, a heater 111, an inner circulation pump 120, a heat exchanger 130, and a proportional valve 140. The heat transfer medium is stored in the liquid storage tank 110. The heater 111 is arranged at the liquid storage tank 110, and the heat transfer medium in the liquid storage tank 110 is heated to a first temperature T1 by the heater 111. The first temperature T1 is measured by a first temperature sensor 112 and fed back to control the heater 111. The inner circulation pump 120 can pump out the heat transfer medium at the first temperature. The pipeline of the heat transfer medium at the first temperature of the first path 121 of the outlet of the inner circulation pump 120 passes through the heat exchanger 130, and the heat transfer medium in the first path 121 is changed to heat transfer medium at a second temperature T2 through heat exchange. The first inlet 141 of the proportional valve 140 is connected to the heat transfer medium at the first temperature of the second path 122 directly pumped out by the inner circulation pump 120, and the second inlet 142 of the proportional valve 140 is connected to the heat transfer medium at the second temperature T2 passing through the heat exchanger 130, and the mixed heat transfer medium becomes heat transfer medium at a third temperature T3 after being controlled by the proportional valve 140.

[0102] When the first temperature T1 is lower than the set temperature, the heater 111 is started. The heater 111 has an over-temperature protector, when the first temperature T1 measured by the first temperature sensor 112 reaches the maximum allowable temperature, the maximum allowable temperature is set in the controller, and the controller controls the heater 111 to be immediately powered off to stop heating. The first temperature can reach a maximum of 120°C.

[0103] The heat exchanger 130 uses a cooling cycle module, and the temperature of the cooling liquid 131 connected is less than the first temperature, and the temperature of the cooling liquid 131 connected is 7-32°C.

[0104] When the first temperature T1 is higher than the set temperature, the controller starts the internal circulation pump 120, and the third temperature T3 of the heat transfer medium at the outlet of the proportional valve flows into the liquid storage tank 110, and mixes with the first temperature T1 of the heat transfer medium to become a new first temperature T1 of the heat transfer medium. The second temperature sensor 144 is arranged at the outlet 143 of the proportional valve 140, and by using the PID control method (proportional integral derivative control method), the temperature value measured by the first temperature sensor 112 and the temperature value measured by the second temperature sensor 144 are used as feedback values, and compared with the temperature value of the set temperature of the heat transfer medium, the opening ratio of the first inlet 141 and the second inlet 142 of the proportional valve 140 is adjusted, the mixing amount ratio of the first path 121 heat transfer medium and the second path 122 heat transfer medium is controlled, and the cycle is repeated until the first temperature T1 reaches the set temperature.

[0105] First, start the heater 111 to heat the temperature to the vicinity of the set temperature, and allow overshoot, i.e. allow the measured first temperature T1 to be higher than the set temperature, and then start the internal circulation pump 120 to finally accurately control the measured first temperature T1 at the set temperature. The first temperature T1 can be raised to less than or equal to 120°C by the heater. The temperature of the cooling liquid at the heat exchanger 130 is 7-32°C. By heating first and then cooling, after mixing by the proportional valve 140, the heat transfer medium can be accurately controlled within the temperature range of 20-120°C, and can quickly reach the set temperature. It can be applied to the temperature control requirements of most passenger car motor and motor controller double-channel tests.

[0106] The inner circulation unit 100 further comprises a safety valve 113, a magnetic flap liquid level meter 114, a liquid discharge valve 115, an inner circulation filter 123, an inner circulation inlet pressure gauge 124, and an inner circulation outlet pressure gauge 125. The safety valve 113 is installed on the top of the liquid storage tank 110, and the allowable pressure value of the safety valve 113 can be adjusted. The allowable pressure value of the safety valve 113 is 1-3 bar, and 1 bar = 100 kPa. When the pressure in the liquid storage tank 110 is higher than the set allowable pressure value, the safety valve 113 automatically opens to release the pressure. A pressure gauge 116 is also provided on the top of the liquid storage tank 113 to observe the pressure in the liquid storage tank 110. A flame arrester 117 is also provided on the top of the liquid storage tank 110. The magnetic flap liquid level meter 114 is provided on the side of the liquid storage tank 110, and the liquid level is transmitted to the controller through the transmitter, and displayed on the display device connected to the controller. The liquid discharge valve 115 is provided in the middle and lower part of the side of the liquid storage tank 110. The inner circulation filter 123 is provided between the inner circulation pump 120 and the liquid storage tank 110. The inner circulation inlet pressure gauge 124 is provided between the inner circulation pump 120 and the inner circulation filter 123, and the inner circulation outlet pressure gauge 125 is provided at the outlet 126 of the inner circulation pump 120.

[0107] The liquid storage tank 110 is used to store the heat transfer medium at a set temperature. The inner circulation unit 100 can provide the heat transfer medium to the set temperature.

[0108] The first temperature control pipeline module 210 and the second temperature control pipeline module 260 are connected in parallel to the liquid storage tank 110.

[0109] The first temperature control pipeline module 210 comprises a first outer circulation pump 211, a first flow meter 212, first outer circulation temperature sensors 213 and 214, first outer circulation pressure sensors 215 and 216, and a first regulating valve 217. According to the measured values of the first flow meter 212, the first outer circulation temperature sensors 213 and 214, and the first outer circulation pressure sensors 215 and 216, the first outer circulation pump 211 and the first regulating valve 217 are adjusted by comparing with the set values in the controller. The return flow from the first regulating valve 217 flows back to the liquid storage tank 110.

[0110] The second temperature control pipeline module 260 comprises a second outer circulation pump 261, a second flow meter 262, second outer circulation temperature sensors 263 and 264, second outer circulation pressure sensors 265 and 266, and a second regulating valve 267. According to the measured values of the second flow meter 262, the second outer circulation temperature sensors 263 and 264, and the second outer circulation pressure sensors 265 and 266, the second outer circulation pump 261 and the second regulating valve 267 are adjusted by comparing with the set values in the controller. The return flow from the second regulating valve 267 flows back to the liquid storage tank 110.

[0111] The first outer circulation pump 211 and the second outer circulation pump 261 are independent of each other, and the first regulating valve 217 and the second regulating valve 267 are independent of each other.

[0112] At this time, the temperature of the heat transfer medium in the liquid storage tank 110 deviates from the set temperature, and the inner circulation unit 100 is started again to control the temperature of the heat transfer medium to the set temperature.

[0113] The temperature of the first controlled device 300 and the second controlled device 400 is controlled respectively.

[0114] The first temperature control pipeline module 210 is provided with a first exchanger at the first controlled device 300. The first outer circulation temperature sensor includes a first outer circulation inlet temperature sensor 213 arranged upstream of the first exchanger and a first outer circulation outlet temperature sensor 214 arranged downstream of the first exchanger. The first outer circulation pressure sensor includes a first outer circulation inlet pressure sensor 215 arranged upstream of the first exchanger and a first outer circulation outlet pressure sensor 216 arranged downstream of the first exchanger.

[0115] The second temperature control pipeline module 260 is provided with a second exchanger at the second controlled device 400. The second outer circulation temperature sensor includes a second outer circulation inlet temperature sensor 263 arranged upstream of the second exchanger and a second outer circulation outlet temperature sensor 264 arranged downstream of the second exchanger. The second outer circulation pressure sensor includes a second outer circulation inlet pressure sensor 265 arranged upstream of the second exchanger and a second outer circulation outlet pressure sensor 266 arranged downstream of the second exchanger.

[0116] The first temperature control pipeline module 210 further comprises: a first outer circulation filter 218, a first outer circulation pump inlet pressure gauge 219, a first outer circulation pump outlet pressure gauge 220, and a first outer circulation return branch 221. The outlet of the liquid storage tank 110 is connected in sequence to: the first outer circulation filter 218, the first outer circulation pump inlet pressure gauge 219, the first outer circulation pump 211, the first outer circulation pump outlet pressure gauge 220, the first flow meter 212, the first outer circulation inlet pressure sensor 215 or the first outer circulation inlet temperature sensor 213, the first outer circulation inlet temperature sensor 213 or the first outer circulation inlet pressure sensor 215 (the order of these two sensors 213, 215 can be interchanged), the first exchanger (located at the first controlled device 300), the first outer circulation outlet temperature sensor 214 or the first outer circulation outlet pressure sensor 216, the first outer circulation outlet pressure sensor 216 or the first outer circulation outlet temperature sensor 214 (the order of these two sensors 214, 216 can be interchanged), the first regulating valve 217, and the return to the liquid return port of the liquid storage tank 110. The first outer circulation return branch 221 is arranged between the upstream of the first flow meter 212 and the downstream of the first regulating valve 217, and the first outer circulation return branch 221 is provided with a first outer circulation return control valve 222. The first outer circulation return control valve 222 can be arranged as an on-off valve, and the first outer circulation return branch 221 is used to return the excess heat transfer medium controlled by the first regulating valve 217 to the liquid storage tank 110.

[0117] The second temperature control pipeline module 260 further comprises: a second outer circulation filter 268, a second outer circulation pump inlet pressure gauge 269, a second outer circulation pump outlet pressure gauge 270, a second outer circulation return branch (not shown in the figure); the outlet of the liquid storage tank 110 is connected in sequence: the second outer circulation filter 268, the second outer circulation pump inlet pressure gauge 269, the second outer circulation pump 261, the second outer circulation pump outlet pressure gauge 270, the second flow meter 262, the second outer circulation inlet pressure sensor 265 or the second outer circulation inlet temperature sensor 263, the second outer circulation inlet temperature sensor 263 or the second outer circulation inlet pressure sensor 265 (the order of the two sensors 263, 265 can be exchanged), the second exchanger (located at the second controlled device 400), the second outer circulation outlet temperature sensor 264 or the second outer circulation outlet pressure sensor 266, the second outer circulation outlet pressure sensor 266 or the second outer circulation outlet temperature sensor 264, the second regulating valve 267, and the return to the liquid return port of the liquid storage tank 110. The second outer circulation return branch is arranged between the upstream of the second flow meter 262 and the downstream of the second regulating valve 267, and the second outer circulation return control valve is arranged on the second outer circulation return branch. The second outer circulation return control valve can be arranged as an on-off valve, and the second outer circulation return branch is used to return the excess heat transfer medium of the flow and pressure controlled by the second regulating valve 267 to the liquid storage tank 110.

[0118] The first state includes a first flow rate and a first pressure. The second state includes a second flow rate and a second pressure. The first flow rate and the first pressure are independently controlled from the second flow rate and the second pressure. The first flow rate can be measured by the first flow meter 212, and the first pressure can be measured by the first outer circulation inlet pressure sensor 215 and / or the first outer circulation outlet pressure sensor 216. The second flow rate can be measured by the second flow meter 262, and the second pressure can be measured by the second outer circulation inlet pressure sensor 265 and / or the second outer circulation outlet pressure sensor 266.

[0119] The first flow rate and the first pressure of the heat transfer medium in the first state are controlled by controlling the opening degree of the first regulating valve 217.

[0120] The second flow rate and the second pressure of the heat transfer medium in the second state are controlled by controlling the opening degree of the second regulating valve 267.

[0121] The controller can be a programmable logic controller (PLC).

[0122] The above describes the specific structure of the temperature control system provided by the present application in detail. The technical effects achieved by the present application are as follows: the outer circulation unit of the temperature control system provided by the present application adopts double-channel parallel pipelines, can control the flow and pressure of the heat transfer medium entering the motor and the motor controller (the embodiment of the first controlled device 300 and the second controlled device 400) respectively, and can meet the double-channel test requirements of most passenger car motors and motor controllers; the inner circulation unit of the temperature control system provided by the present application is that the heat transfer medium is heated first and then cooled, and the adjustable temperature range of the heat transfer medium can reach 20-120℃.

[0123] The above is only the preferred embodiment of the present application, and is not used to limit the present application. The present application can have various changes and variations for those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A temperature control system, characterized by, Comprise: Inner circulation unit, which provides heat transfer medium; Outer circulation unit, which controls the temperature of the first controlled device and the second controlled device through the first temperature control pipeline module and the second temperature control pipeline module which can be independently measured and controlled; the first temperature control pipeline module flows the first state heat transfer medium, and the second temperature control pipeline module flows the second state heat transfer medium; The inner circulation unit comprises: Liquid storage tank, which stores heat transfer medium; Heater, which is arranged at the liquid storage tank, heats the heat transfer medium in the liquid storage tank to a first temperature, and the first temperature is measured by a first temperature sensor and feedback controls the heater; Inner circulation pump, which can pump out the heat transfer medium at the first temperature; Heat exchanger, the pipeline of the heat transfer medium at the first temperature of the first outlet of the inner circulation pump passes through the heat exchanger, and the heat transfer medium in the first pipeline is changed to heat transfer medium at the second temperature through heat exchange; Proportional valve, the first inlet of the proportional valve is connected to the heat transfer medium at the first temperature of the second pipeline pumped out directly by the inner circulation pump, and the second inlet of the proportional valve is connected to the heat transfer medium at the second temperature passing through the heat exchanger, which becomes heat transfer medium at the third temperature after being controlled by the mixed proportion; When the first temperature is lower than the set temperature, start the heater; The heater has an over-temperature protector, when the first temperature measured by the first temperature sensor reaches the maximum allowable temperature, the maximum allowable temperature is set in the controller, and the controller controls the heater to be powered off immediately to stop heating; the first temperature can reach 120℃ at most; The heat exchanger adopts a cooling circulation module, and the temperature of the cooling liquid connected is less than the first temperature, and the temperature of the cooling liquid connected is 7-32℃; When the first temperature is higher than the set temperature, the controller starts the inner circulation pump, and the heat transfer medium at the third temperature of the outlet of the proportional valve flows into the liquid storage tank to mix with the heat transfer medium at the first temperature to become new heat transfer medium at the first temperature, A second temperature sensor is arranged at the outlet of the proportional valve, and a PID control method is used, the temperature value measured by the first temperature sensor and the temperature value measured by the second temperature sensor are used as feedback values, which are compared with the temperature value of the set temperature of the heat transfer medium, the opening ratio of the first inlet and the second inlet of the proportional valve is adjusted, the mixing amount ratio of the first heat transfer medium and the second heat transfer medium is controlled, and the cycle is repeated until the first temperature reaches the set temperature.

2. The temperature control system of claim 1, wherein, First start the heater to heat the temperature to the vicinity of the set temperature, allow overshoot, that is, allow the measured first temperature to be higher than the set temperature, and then start the inner circulation pump to finally control the measured first temperature at the set temperature accurately.

3. The temperature control system of claim 1 or 2, wherein, The inner circulation unit further comprises: Safety valve, which is installed at the top of the liquid storage tank, the allowable pressure value of the safety valve can be adjusted, the allowable pressure value of the safety valve is 1-3bar, when the pressure in the liquid storage tank is higher than the set allowable pressure value, the safety valve automatically opens to release the pressure; a pressure gauge is also arranged at the top of the liquid storage tank to observe the pressure in the liquid storage tank; a flame arrester is also arranged at the top of the liquid storage tank; A magnetic flap liquid level meter is arranged on the side of the liquid storage tank, and transmits the liquid level signal to the controller through the transmitter, and displays on the display device connected with the controller; A liquid discharge valve is arranged in the lower part of the side of the liquid storage tank; An internal circulation filter is arranged between the internal circulation pump and the liquid storage tank; An internal circulation inlet pressure gauge is arranged between the internal circulation pump and the internal circulation filter, and an internal circulation outlet pressure gauge is arranged at the outlet of the internal circulation pump.

4. The temperature control system of claim 1, wherein, Comprise: A liquid storage tank for storing heat transfer medium at a set temperature; the internal circulation unit can provide heat transfer medium to the set temperature; The first temperature control pipeline module and the second temperature control pipeline module are connected to the liquid storage tank in parallel; The first temperature control pipeline module comprises: a first external circulation pump, a first flow meter, a first external circulation temperature sensor, a first external circulation pressure sensor, and a first regulating valve; the first external circulation pump and the first regulating valve are adjusted according to the comparison between the measurement values of the first flow meter, the first external circulation temperature sensor and the first external circulation pressure sensor and the set values in the controller; and the return flow from the first regulating valve to the liquid storage tank; The second temperature control pipeline module comprises: a second external circulation pump, a second flow meter, a second external circulation temperature sensor, a second external circulation pressure sensor, and a second regulating valve; the second external circulation pump and the second regulating valve are adjusted according to the comparison between the measurement values of the second flow meter, the second external circulation temperature sensor and the second external circulation pressure sensor and the set values in the controller; and the return flow from the second regulating valve to the liquid storage tank; The first external circulation pump and the second external circulation pump are independent of each other, and the first regulating valve and the second regulating valve are independent of each other.

5. The temperature control system according to claim 4, wherein The first temperature control pipeline module is provided with a first exchanger at the first controlled device; the first external circulation temperature sensor comprises: a first external circulation inlet temperature sensor arranged upstream of the first exchanger and a first external circulation outlet temperature sensor arranged downstream of the first exchanger; and the first external circulation pressure sensor comprises: a first external circulation inlet pressure sensor arranged upstream of the first exchanger and a first external circulation outlet pressure sensor arranged downstream of the first exchanger; The second temperature control pipeline module is provided with a second exchanger at the second controlled device; The second external circulation temperature sensor comprises: a second external circulation inlet temperature sensor arranged upstream of the second exchanger and a second external circulation outlet temperature sensor arranged downstream of the second exchanger; and the second external circulation pressure sensor comprises: a second external circulation inlet pressure sensor arranged upstream of the second exchanger and a second external circulation outlet pressure sensor arranged downstream of the second exchanger.

6. The temperature control system according to claim 5, wherein The first temperature control pipeline module further comprises: a first external circulation filter, a first external circulation pump inlet pressure gauge, a first external circulation pump outlet pressure gauge, a first external circulation return branch; the outlet of the liquid storage tank is sequentially connected with the first external circulation filter, the first external circulation pump inlet pressure gauge, the first external circulation pump, the first external circulation pump outlet pressure gauge, the first flow meter, the first external circulation inlet pressure sensor or the first external circulation inlet temperature sensor, the first external circulation inlet temperature sensor or the first external circulation inlet pressure sensor, the first exchanger, the first external circulation outlet temperature sensor or the first external circulation outlet pressure sensor, the first external circulation outlet pressure sensor or the first external circulation outlet temperature sensor, and the first regulating valve, which returns to the liquid inlet of the liquid storage tank; the first external circulation return branch is arranged between the upstream of the first flow meter and the downstream of the first regulating valve, and the first external circulation return control valve is arranged on the first external circulation return branch; The second temperature control pipeline module further comprises: a second external circulation filter, a second external circulation pump inlet pressure gauge, a second external circulation pump outlet pressure gauge, a second external circulation return branch; the outlet of the liquid storage tank is sequentially connected with the second external circulation filter, the second external circulation pump inlet pressure gauge, the second external circulation pump, the second external circulation pump outlet pressure gauge, the second flow meter, the second external circulation inlet pressure sensor or the second external circulation inlet temperature sensor, the second external circulation inlet temperature sensor or the second external circulation inlet pressure sensor, the second exchanger, the second external circulation outlet temperature sensor or the second external circulation outlet pressure sensor, the second external circulation outlet pressure sensor or the second external circulation outlet temperature sensor, and the second regulating valve, which returns to the liquid inlet of the liquid storage tank; The second external circulation return branch is arranged between the upstream of the second flow meter and the downstream of the second regulating valve, and the second external circulation return control valve is arranged on the second external circulation return branch.

7. The temperature control system according to claim 1 or 4 or 5 or 6, wherein, The first state comprises a first flow rate and a first pressure, and the second state comprises a second flow rate and a second pressure; The first flow rate and the first pressure are independently controlled from the second flow rate and the second pressure.

8. The temperature control system according to claim 4 or 5 or 6, wherein, The first flow rate and the first pressure of the heat transfer medium in the first state are controlled by controlling the opening degree of the first regulating valve; The second flow rate and the second pressure of the heat transfer medium in the second state are controlled by controlling the opening degree of the second regulating valve.

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