CN207778882U - Fluid injection control system and fluid circulating system - Google Patents
Fluid injection control system and fluid circulating system Download PDFInfo
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- CN207778882U CN207778882U CN201721716448.9U CN201721716448U CN207778882U CN 207778882 U CN207778882 U CN 207778882U CN 201721716448 U CN201721716448 U CN 201721716448U CN 207778882 U CN207778882 U CN 207778882U
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Abstract
The embodiments of the present invention provide fluid injection control system and fluid circulating system.The fluid injection control system includes injection valve, control device and energy storage device, the injection valve is located at fluid and flows into the path in an equipment, which is configured to continue to power to maintain the work of the control device to control device in control device power down.
Description
Technical field
The embodiments of the present invention are related to control field, and more particularly, to fluid injection control system and tool
There is the fluid circulating system of the injection valve control system.
Background technology
In some Process Control Systems, such as in refrigeration systems, by using compressor to for example carrying out flash-pot
The fluid of such as refrigerant, lubricant etc is compressed, such as is transported in condenser.When load increases, need to improve
The rotating speed of compressor increases fluid flow, to meet burden requirement.But the raising of the rotating speed with compressor, from compression
The temperature of the fluid of machine discharge accordingly increases, and fluid property is caused to be degenerated, if chiller refrigeration performance or lubricants performance decline,
So that compressor efficiency reduces, system reliability, stability decline.In order to ensure the normal operation of compressor and corresponding system,
Liquid injection valve can be controlled by controller the fluid of the outlet discharge from condenser is injected directly into compressor, to reduce compression
The discharge fluid temperature (F.T.) of machine.
Under controller power-down conditions, such as in supply to the undertension of controller or reduction or in controller
Under power blackout situation, controller cannot continue to control liquid injection valve, in order to avoid liquid injection valve keeps the aperture before power down to continue to compression
Machine sprays fluid, and system usually requires additional solenoid valve and pressed to prevent the fluid of such as refrigerant etc from being injected by liquid injection valve
Contracting machine, this control mode increases the complexity of whole system control and client buy solenoid valve and relevant control circuit and
The cost of installation.
Invention content
One of the utility model aims to overcome that in above and other problem and defect existing in the prior art
It is at least one.
The embodiment of the one side of the utility model provides a kind of fluid injection control system, including injection valve, control
Device and energy storage device processed, the injection valve are located at fluid and flow into the path in an equipment, which is configured to controlling
Continue to power to maintain the work of the control device to control device when device power down processed, which is configured to described
The injection valve is controlled when control device power down to close.
In one embodiment, control device is further configured to control the injection in the energized state of the control device
The aperture of valve is to control the flow of the fluid sprayed into the equipment by injection valve.
In one embodiment, fluid injection control system further includes power-fail detection circuit, power-fail detection circuit configuration
At the state that detection external power supply is powered to control device, and when power down occurs in power supply of the external power supply to control device to control
Device processed sends power-off signal.
In one embodiment, fluid injection control system further includes valve-driving circuit, which is configured to control
The aperture of the injection valve is made, control device is further configured to when receiving the power-off signal to the electrohydraulic valve actuator
Road sending valve shutdown signal so that valve-driving circuit closes injection valve.
In one embodiment, valve-driving circuit be configured to one valve activator of control drive the injection valve with one by
Control aperture opens or drives the injection valve to close.
In one embodiment, the energy storage device is further configured to continue to valve in the case of control device power down
At least one of driving circuit and valve activator are powered.
In one embodiment, the energy storage device is electrically connected with the external power supply powered to the control device.
In one embodiment, the energy storage device includes ultracapacitor or chargeable storage.
In one embodiment, the energy storage device is directly electrically connected with the control device.
In one embodiment, the energy storage device is electrically connected by switching with the control device, the first switch
In the conducting in control device power down so that the electric energy from energy storage device continues supply to control device by the switch.
In one embodiment, the switch includes diode or MOS transistor.
In one embodiment, at least one of the energy storage device and the power-fail detection circuit are filled with the control
It sets and is integrated in same controller.
The embodiment of the other side of the utility model provides a kind of fluid circulating system, including the utility model
Fluid injection control system described in any embodiment and the equipment, the fluid injection control system control fluid to described
The injection of equipment.
In one embodiment, the equipment includes compressor, and the fluid circulating system further includes evaporator and cold
Condenser, the compressor, condenser and evaporator are sequentially connected to by pipeline, to form fluid circulation loop, and the injection
Valve is arranged to be flowed into from the outlet of the condenser in the path in the compressor in the fluid.
In one embodiment, fluid circulating system further includes temperature-detecting device, which is configured to
It detects the temperature from the fluid of the outlet outflow of the equipment and sends the temperature signal for indicating the temperature to the control device,
And the control device is further configured to determine the fluid of the outlet outflow of the equipment according to the temperature signal
Temperature whether more than a threshold value, and when more than the threshold value control injection valve fluid is injected into the equipment to reduce from institute
State the temperature of the fluid of the outlet outflow of equipment.
The embodiment of the another aspect of the utility model additionally provides a kind of fluid injection control method, including：Using
Injection of the fluid injection control system control fluid to the equipment described in any embodiment of the utility model.
In one embodiment, include to the injection of the equipment using fluid injection control system control fluid：
The state that detection external power supply is powered to the control device；
According to the state detected determine the control device whether power down；And
Continue to power to the control device from energy storage device in the control device power down so that the control device
The injection valve is closed to prevent the fluid in the path from being ejected into the equipment by the injection valve.
By below with reference to attached drawing to being described in detail made by the utility model, other purposes of the utility model and excellent
Point will be evident, and can help to be fully understood by the utility model.
Description of the drawings
These and or other aspects, features and advantages of the utility model are from below in conjunction with the accompanying drawings to illustrative embodiment
Description in will be apparent and be readily appreciated that, wherein：
Fig. 1 is the schematic diagram for the fluid circulating system for showing an exemplary embodiment according to the present utility model；
Fig. 2 is the fluid injection control system for schematically showing an exemplary embodiment according to the present utility model
Block diagram；
Fig. 3 is the fluid injection control system for schematically showing another exemplary embodiment according to the present utility model
Block diagram；
Fig. 4 is the fluid injection control system for schematically showing another exemplary embodiment according to the present utility model
Block diagram；And
Fig. 5 is the fluid injection control method for schematically showing an exemplary embodiment according to the present utility model
Flow chart.
Specific implementation mode
Below in conjunction with attached drawing, the embodiments of the present invention are described in detail.In the present specification, identical or
Similar component is indicated by same or similar drawing reference numeral.
In addition, in the following detailed description, for purposes of illustration only, elaborating many concrete details to provide to this practicality
The comprehensive understanding of novel embodiment.It should be apparent, however, that one or more embodiments are without these specific details
It can also be carried out.In other cases, well known construction and device is diagrammatically embodied to simplify attached drawing.
One according to the present utility model total utility model design, with the injection valve for spraying fluid to an equipment
An energy storage device, the energy storage device is combined to continue to supply to control device when controlling the control device power down of injection valve in system
Electricity so that control device can close injection valve, to prevent fluid from continuing to inject in the equipment by the injection valve, from without
Additional solenoid valve is wanted to cut off supply of the fluid to the equipment.
It is following that the explanation of each embodiment of the utility model is intended to reference to attached drawing to illustrate the invention structure of the utility model
Think, and is not construed as a kind of limitation to the utility model.
Fig. 1 schematically shows the fluid circulating system of an exemplary embodiment according to the present utility model, the fluid
The circulatory system can be for example refrigeration or air-conditioning system, for making the fluid circulation of such as refrigerant, lubricant etc pass through one
Circuit.The fluid circulating system generally includes to be located in the multiple equipment in the circuit and being in fluid communication with each other, including as schemed institute
The equipment 1,2,3 shown.Illustratively, equipment 1 can be compressor, and equipment 2 can be condenser, and equipment 3 can be evaporator.
Compressor, condenser and evaporator are for example sequentially connected to by pipeline, to form fluid circulation loop.It is appreciated that this practicality
Novel without being limited thereto, which can also include the equipment for making the additional of fluid circulation or replacing.Below
The embodiments of the present invention are carried out only by taking the fluid circulating system including compressor 1, condenser 2 and evaporator 3 as an example detailed
Thin description.
Illustratively, in refrigeration or air-conditioning system, the rotation of compressor is extracted out in time in the evaporator communicated therewith
Fluid (such as refrigerant) will enter low-temp low-pressure fluid compression therein into high-temperature, high pressure fluid, and high-temperature, high pressure fluid is defeated
It is sent to condenser, condenser makes the high-temperature, high pressure fluid from compressor and extraneous cooling medium (air as heat-exchange apparatus
Or water etc.) carry out heat exchange so that enter high-temperature, high pressure fluid therein cooling, be condensed into high normal pressure and temperature fluid, and evaporator
Fluid evaporator as another heat-exchange apparatus condenser in future is vapor stream, absorbs the heat for the substance that is cooled, reaches
To refrigeration purpose.In some instances, restricting element (such as throttle valve or expansion valve) can also be set in the upstream of evaporator,
Future, the high normal pressure and temperature fluid of condenser was transformed into low-temp low-pressure fluid, then low-temp low-pressure fluid feeding evaporator is inhaled
Thermal evaporation.
In the process of running, when overload or high pressure ratio operation, compressor electric motor, compressor part generate heat compressor
Than more serious, compressor efficiency is caused to reduce, system reliability, stability decline.In order to ensure compressor and corresponding system
Normal operation, as shown in Figure 1, the fluid circulating system of embodiment according to the present utility model further includes fluid injection control system
100, it is used to inject fluid into compressor, in such as such as its air intake duct or compression chamber, to reduce its motor or part temperatures,
The ability of compressor is adjusted from there through hydrojet, improves compressor efficiency.In the illustrated embodiment, fluid injection control system
100 will spray into from a part of fluid directly (needing not move through evaporator) of the outlet discharge of condenser 2 in compressor 1.
As shown in Figure 1, fluid injection control system 100 includes injection valve or liquid injection valve 101 and control device 102, injection
Valve or liquid injection valve 101 are located in fluid and are flowed into the path of compressor 1 from the outlet of condenser 2, and control device 102 is configured to
When needing (such as the discharge fluid of compressor when the temperature is excessively high, compressor electric motor, compressor part fever than it is more serious when,
Etc.) control injection valve or liquid injection valve 101 proper amount of cooling fluid is injected into compressor 1.Control device is in its energization shape
The aperture that injection valve is controlled in state (includes but not limited to that control injection valve is opened with controlled aperture, control injection valve is closed
Deng) to control the flow of the fluid sprayed into compressor by injection valve.
In one exemplary embodiment, as shown in Figure 1, temperature detection also is arranged in the exit of compressor 1 or downstream
Device 107 (referring to Fig. 2-4), temperature-detecting device 107 can detect from compressor 1 outlet outflow fluid temperature and to
Control device 102 sends the temperature signal T for indicating the temperature, and whether control device 102 determines compressor 1 according to the temperature signal
Normal operation or overheat such as determine whether the temperature of fluid being discharged from compressor 1 is excessively high or more than a threshold value, and from compression
The temperature for the fluid that machine 1 is discharged is excessively high or control injection valve 101 injects cooling fluid, Tathagata into compressor 1 when more than threshold value
The fluid that the temperature of condenser 2 has been decreased by.
Under 102 power-down conditions of control device, for example, being supplied from external power supply to the undertension of control device 102 or
Under reduction or power blackout situation, control device cannot continue to control injection valve or liquid injection valve 101 by the aperture before keeping power down, stream
Body continues through valve 101 and enters compressor 1.In order to continue to control injection valve in control device power down, new according to this practicality
It is arranged or combines energy storage device 103 in the fluid injection control system 100 of the embodiment of type, is configured in control device power down
In the case of continue to control device 102 power, to maintain the work of control device so that control device can continue to control spray
Penetrate the operation of valve.In one example, when control device power down is continued to power to the control device from energy storage device, control
Device closes injection valve to prevent fluid from continuing to be ejected into compressor by the injection valve.For example, in control device power down and
When continuing to power to the control device from energy storage device, 102 sending valve shutdown signal of control device to close injection valve 101, with
It prevents fluid from continuing to be injected into compressor 1 by the injection valve 101, it is logical to cut off fluid without additional solenoid valve
The injection of overspray valve or liquid injection valve 101 into compressor 1.
In some instances, as illustrated in fig. 1 and 2, energy storage device 103 is directly electrically connected with control device 102, to once
Undertension that control device 102 is supplied due to external power supply or reduction or power-off and there are power-down conditions, energy storage device 103
Continue to power to control device 102 immediately.In further embodiments, energy storage device 103 can operatively or as needed with
Control device 102 is electrically connected, for example, as shown in figure 3, energy storage device 103 is electrically connected by switch K with control device 102 is electrically connected
It connects, or as shown in figure 4, energy storage device 103 is electrically connected by normally opened first switch K1 with control device 102, in control dress
When setting 102 power down or when needing to provide additional electrical power to control device, the switch connection or closure, with the energy storage device that is electrically connected
103 and control device 102.The disconnection and closure/connection of the switch can carry out manually, can also be as described below, according to triggering
Signal carries out automatically.
Fig. 2 schematically shows the fluid injection control systems of an exemplary embodiment according to the present utility model.
As shown, fluid injection control system 100 further includes power-fail detection circuit 104, detection external power supply 10 is configured to control
State that device 102 processed is powered and control device 102 due to 10 electricity shortage of external power supply and when power down, at least fills to control
102 transmission power-off signal S0 are set, the control device 102 of power supply is continued according to the power-off signal by energy storage device 103 in power down
S0 sends shutdown signal to injection valve 101, is prevented with closing injection valve 101 or cut-out fluid passes through injection valve or liquid injection valve
101 continue to spray into compressor 1.
Can be by the circuit structure or detection device of diversified forms come the power down of detection control apparatus, such as it can be by becoming
Transformer coil, transistor arrangement, trigger, resistance, operational amplifier, optocoupler etc. constitute power-fail detection circuit, setting from
In the circuit that external power supply is powered to control device or be connected to the circuit, with external power supply occur electricity shortage or reduction,
Or power-off etc. causes to generate in time when control device power down and at least sends power-off signal or trigger signal to control device, it is such as single
Pulse signal form.
In the embodiment illustrated in fig. 2, fluid injection control system 100 can also include valve-driving circuit 105, and valve drives
Dynamic circuit 105 is electrically connected with control device 1.02, with receive come self-control device 102 control signal S (such as valve shutdown signal or
Valve opening signal), and drive signal S1, valve activator 106 are sent to a valve activator 106 according to the control signal S
It is opened with a controlled aperture according to drive signal S1 driving injection valves 101 or driving injection valve is closed, passed through to control fluid
Injection of the valve 101 into compressor 1.
In 102 power down of control device, the control device 102 of power supply is continued according to from detection of power loss by energy storage device 103
The power-off signal that circuit 104 receives is to 105 sending valve shutdown signal of valve-driving circuit, to be passed through by valve-driving circuit 105
Valve activator 106 drives injection valve 101 to close, and thus prevents fluid from continuing to inject in compressor 1 by valve 101 in time.
In some examples, valve activator may include stepper motor, but the utility model is without being limited thereto, in other examples can be with
Using other driving mechanisms that injection valve can be caused to open or close.
Some embodiments according to the present utility model, as in Figure 2-4, energy storage device 103 can also and valve-driving circuit
105 and/or valve activator 106 be electrically connected, to continue in the case of 102 power down of control device to 105 He of valve-driving circuit
At least one of valve activator 106 is powered, to ensure that they have enough electrical energy drive injection valves 101 to close.
In embodiment shown in fig. 2, energy storage device 103 drives with control device 102, valve-driving circuit 105 and valve
Mechanism 106 is directly electrically connected, and to continue supply to them immediately when they power-down conditions occur is enough that injection valve 101 is caused to close
The electric energy closed.
In embodiment shown in fig. 3, energy storage device 103 passes through switch K and control device 102, valve-driving circuit 105
It is electrically connected with valve activator 106, switch K is connected in control device power down so that the electric energy from energy storage device
Supply is continued to control device 102, valve-driving circuit 105 and/or valve activator 106 by the switch.As shown, opening
It closes K and can be electrically connected to external power supply to the path of control device.Illustratively, switch K may include diode, and such as reversed two
Pole pipe, or including MOS transistor, such as PMOS transistor, in control device power down, such as supplied to control dress by external power supply
When the voltage drop set is as low as below normal working voltage, the switch conduction of this form, to be continued from energy storage device to control
Device, valve-driving circuit and/or valve activator power supply.
And in the embodiment illustrated in figure 4, energy storage device 103 passes through normally opened first switch K1 and control device 102
Electrical connection, is electrically connected by normally opened second switch K2 with valve-driving circuit 105, is driven by normally opened third switch K3 and valve
Mechanism 106 is electrically connected.The disconnection of switch K1, K2, K3 and closure can carry out manually, can also be according to received corresponding tactile
It signals to carry out automatically, for example, trigger signal can come from power-fail detection circuit 104, control device 102 or other triggering machines
Structure.Illustratively, when power-down conditions occurs in the power supply of external power supply 10 to control device 102, power-fail detection circuit 104 in addition to
It is sent except power-off signal S0 to control device 102, also corresponding trigger signal is sent to switch K1, K2, K3 simultaneously, with automatic
It is closed these switches and energy storage device 103 is electrically connected with control device 102, valve-driving circuit 105 and valve activator 106.
Alternatively or additionally, power down prompt can be provided to operating personnel from power-fail detection circuit or control device, with convenient to operate
Personnel understand that control device power down or carry out respective handling.
In another embodiment, energy storage device 103 can also either directly or indirectly be electrically connected with power-fail detection circuit 104
Connect, with when there are above-mentioned power-down conditions, also power to power-fail detection circuit 104, ensure power-fail detection circuit 104 constantly or
It is at least capable of providing power-off signal or trigger signal whithin a period of time.In other embodiments, power-fail detection circuit 104 also may be used
Whether restore normal with the power supply for detecting external power supply 10 to control device 102, and when service restoration is normal to control device
102 send signal, inject or stop injection into compressor 1 by injection valve 101 to restore fluid from control device 102.This
Outside, switch K1, K2, K3 can manually be disconnected when service restoration is normal, or by power-fail detection circuit 104 again to
These switches send break trigger signal, and to disconnect these switches automatically, and above-mentioned switch K can be disconnected or end automatically, with
Disconnect power supply of the energy storage device to control device.
In the embodiment that Fig. 2-4 is illustrated, it is also provided with power-switching circuit 110, external power supply 10 will be come from
Voltage be converted into being suitble to control device 102, valve-driving circuit 105, valve activator 106 and/or power-fail detection circuit 104 just
The voltage often to work.
In some embodiments, as in Figure 2-4, energy storage device 102 can (such as passing through power-switching circuit 110) electricity
It is connected to the external power supply 10 powered to control device 102.In other embodiments, energy storage device can also be electrically connected to other
For electric installation or system so that enough electric energy can be stored in energy storage device when the non-power down of control device, in appearance
It can be supplied to control device, valve-driving circuit, valve activator and/or power-fail detection circuit when stating power-down conditions and be enough to cause
The electric energy that injection valve is closed.Illustratively, energy storage device includes ultracapacitor or chargeable storage.
Some embodiments according to the present utility model, one or two in energy storage device and power-fail detection circuit can collect
At or be incorporated in same or single controller, be such as integrated on the same circuit board, to provide integrated hydrojet controller,
Injection or injection of the fluid to the equipment of such as compressor etc, and the power supply in external power supply to controller can be controlled
Occur to continue to power to controller from integrated energy storage device when power down, so as to controller control liquid injection valve closing
Fluid is prevented to continue to inject into the equipment.In other embodiments, energy storage device can be external to control device.Control
Device processed may include processor, such as MCU.In addition, power-switching circuit, valve-driving circuit etc. can also be integrated with control device
Or it is incorporated in same or single controller.
The embodiments of the present invention additionally provide a kind of fluid injection control method, and any of the above-described implementation may be used
The fluid injection control system that example provides controls injection or injection of the fluid to the equipment.As shown in figure 5, this method can wrap
Include determine or judge external power supply to control device power whether the step S11 of power down.This method can also include step
S12 can detect the state that external power supply is powered to control device, with according to institute by power-fail detection circuit in step s 12
The state of detection determine control device whether power down, as described above.When determining that power-down conditions occurs in control device, in step
Continue to power to control device from energy storage device in S13 so that control device closes injection valve to prevent fluid from passing through the injection
Valve is ejected into the equipment.It is as needed by control device in step S14 when determining that control device power-down conditions does not occur
Injection valve is normally controlled to open or close, to control injection of the fluid by injection valve to the equipment, meanwhile, it can be in step
Constantly detect the state that external power supply power to control device in rapid S12, with determining control device in time whether power down.
Although the utility model is illustrated in conjunction with attached drawing, embodiment disclosed in attached drawing is intended to this practicality
Novel preferred embodiment illustrates, and should not be understood as a kind of limitation to the utility model.Ruler in attached drawing
Very little ratio is only schematical, can not be construed as a limitation of the present invention.
Although some embodiments of the utility model general plotting have been shown and have illustrated, those of ordinary skill in the art will
Understand, in the case of the principle and spirit conceived without departing substantially from this totality utility model, these embodiments can be made a change, this
The range of utility model is limited with claim and their equivalent.
Claims (15)
1. a kind of fluid injection control system (100), which is characterized in that the fluid injection control system include injection valve (101),
Control device (102) and energy storage device (103)；
The injection valve is located at fluid and flows into the path in equipment (1),
The energy storage device is configured to continue to power to maintain the work of the control device to control device in control device power down
Make,
The control device is configured to control the injection valve closing in the control device power down.
2. fluid injection control system according to claim 1, which is characterized in that control device is further configured to described
The aperture of the injection valve is controlled in the energized state of control device to control the stream sprayed into the equipment by injection valve
The flow of body.
3. fluid injection control system according to claim 1, which is characterized in that the fluid injection control system is also wrapped
It includes：
Power-fail detection circuit (104), the power-fail detection circuit are configured to the shape that detection external power supply (10) is powered to control device
State, and when power down occurs in power supply of the external power supply to control device power-off signal is sent to control device.
4. fluid injection control system according to claim 3, which is characterized in that the fluid injection control system is also wrapped
It includes：
Valve-driving circuit (105), the valve-driving circuit are configured to control the aperture of the injection valve,
Wherein control device is further configured to close to the valve-driving circuit sending valve when receiving the power-off signal
Close signal so that valve-driving circuit closes injection valve.
5. fluid injection control system according to claim 4, which is characterized in that valve-driving circuit is configured to control one
Valve activator (106) drives the injection valve to open or drive the injection valve to close with a controlled aperture.
6. fluid injection control system according to claim 5, which is characterized in that the energy storage device is further configured to
Continue to power at least one of valve-driving circuit and valve activator in the case of control device power down.
7. the fluid injection control system according to any one of claim 1-6, which is characterized in that the energy storage device with
The external power supply electrical connection powered to the control device.
8. the fluid injection control system according to any one of claim 1-6, which is characterized in that the energy storage device packet
Include ultracapacitor or chargeable storage.
9. the fluid injection control system according to any one of claim 1-6, which is characterized in that the energy storage device with
The control device is directly electrically connected.
10. the fluid injection control system according to any one of claim 1-6, which is characterized in that the energy storage device
It is electrically connected with the control device by switching, the switch is connected in control device power down so that from energy storage device
Electric energy continues supply to control device by the switch.
11. fluid injection control system according to claim 10, which is characterized in that it is described switch include diode or
MOS transistor.
12. the fluid injection control system according to any one of claim 3-6, which is characterized in that the energy storage device
It is integrated in same controller with the control device at least one of the power-fail detection circuit.
13. a kind of fluid circulating system, which is characterized in that the fluid circulating system includes described in any one of claim 1-12
Fluid injection control system and the equipment, wherein injection of the fluid injection control system control fluid into the equipment.
14. fluid circulating system according to claim 13, which is characterized in that the equipment includes compressor, and should
Fluid circulating system further includes evaporator and condenser, and the compressor, condenser and evaporator are sequentially connected to by pipeline, with shape
At fluid circulation loop,
The wherein described injection valve is arranged to be flowed into from the outlet of the condenser in the path in the compressor in the fluid.
15. the fluid circulating system according to claim 13 or 14, which is characterized in that the fluid circulating system further includes temperature
Spend detection device, which is configured to detect from the temperature of the fluid of the outlet outflow of the equipment and to described
Control device sends the temperature signal for indicating the temperature, and
The control device is further configured to determine the fluid of the outlet outflow of the equipment according to the temperature signal
Temperature whether be more than threshold value, and when more than the threshold value control injection valve fluid is injected into the equipment to reduce from described
The temperature of the fluid of the outlet outflow of equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721716448.9U CN207778882U (en) | 2017-12-08 | 2017-12-08 | Fluid injection control system and fluid circulating system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721716448.9U CN207778882U (en) | 2017-12-08 | 2017-12-08 | Fluid injection control system and fluid circulating system |
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| CN207778882U true CN207778882U (en) | 2018-08-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109900003A (en) * | 2017-12-08 | 2019-06-18 | 丹佛斯（天津）有限公司 | Fluid injection control system and fluid circulating system |
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2017
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109900003A (en) * | 2017-12-08 | 2019-06-18 | 丹佛斯（天津）有限公司 | Fluid injection control system and fluid circulating system |
| US11085661B2 (en) | 2017-12-08 | 2021-08-10 | Danfoss (Tianjin) Ltd. | Fluid injection control system and fluid circulation system |
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