CN207849841U - A kind of handpiece Water Chilling Units - Google Patents
A kind of handpiece Water Chilling Units Download PDFInfo
- Publication number
- CN207849841U CN207849841U CN201721831051.4U CN201721831051U CN207849841U CN 207849841 U CN207849841 U CN 207849841U CN 201721831051 U CN201721831051 U CN 201721831051U CN 207849841 U CN207849841 U CN 207849841U
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- temperature
- signal
- water
- circuit
- relay
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 125
- 238000005057 refrigeration Methods 0.000 claims abstract description 52
- 238000001514 detection method Methods 0.000 claims abstract description 37
- 239000000498 cooling water Substances 0.000 claims abstract description 3
- 230000004044 response Effects 0.000 claims description 7
- 238000012544 monitoring process Methods 0.000 claims description 2
- 239000002699 waste material Substances 0.000 description 7
- 230000009471 action Effects 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 4
- 230000008020 evaporation Effects 0.000 description 4
- 230000005611 electricity Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
The utility model discloses a kind of handpiece Water Chilling Units, its key points of the technical solution are that including the water outlet and mechanical refrigeration equipment of cooling water outflow, further include water temperature detection circuit, open control circuit and closing control circuit, water temperature detection circuit is used to detect the leaving water temperature and output temperature signal of water outlet, open control circuit is according to the unlatching of temperature signal control machinery refrigeration equipment, and closing control circuit is according to the closing of temperature signal control machinery refrigeration equipment；Warm water detection circuit is detected the water temperature of water outlet, when the water temperature of water outlet is unable to meet demand, open control circuit starts according to the temperature signal control machinery refrigeration equipment that water temperature detection circuit exports, produce low-temperature cold water in time, it is energy saving, when the water temperature of water outlet is met the requirements, closing control circuit is closed according to the temperature signal control machinery refrigeration equipment that water temperature detection circuit exports, and reduces the consumption of the energy.
Description
Technical field
The utility model is related to refrigeration equipments, more specifically, it relates to a kind of handpiece Water Chilling Units.
Background technology
The cooling handpiece Water Chilling Units of evaporation at present are combined with mechanical refrigeration handpiece Water Chilling Units often by being simply formed by stacking, and are made
Have that unit volume is huge in actual use, inconvenient defect is installed, is assembled using several identical units in Practical Project
When can not coordinate well.
To overcome the above disadvantages, application number 201210256643.3 discloses evaporation cooling and the united mould of air-cooled heat pump
Block handpiece Water Chilling Units, mainly by passing through between the cooling handpiece Water Chilling Units of evaporation, air-cooled heat pump Hot water units and high-pressure sprayer
Pipe network connects compound composition, each section comprising modules form.The modular chillers of the invention, using the cooling cold water of evaporation
Unit produces low-temperature cold water or produces high-temperature-hot-water using air-cooled heat pump, can also both be used in combination, the low-temperature cold water produced is not
When energy meet demand, opens mechanical refrigeration and assisted producing the low-temperature cold water for meeting sensible heat end.
When the low-temperature cold water produced is unable to meet demand, then required for needing to open mechanical refrigeration to ensure to produce to obtain
Low-temperature cold water, and generally require first just can know that whether low-temperature cold water meets the requirements after a period of use, in this way use meeting
Lead to the waste of the energy.
Utility model content
The purpose of this utility model is to provide a kind of handpiece Water Chilling Units, has and is unable to meet demand in the low-temperature cold water produced
When, the advantages of opening waste of the mechanical refrigeration equipment to reduce the energy in time.
The above-mentioned technical purpose of the utility model technical scheme is that：A kind of handpiece Water Chilling Units, packet
The water outlet and mechanical refrigeration equipment for including the outflow of cooling water, further include water temperature detection circuit, open control circuit and closing control
Circuit, the water temperature detection circuit are used to detect the leaving water temperature and output temperature signal of water outlet, the open control circuit
According to the unlatching of temperature signal control machinery refrigeration equipment, the closing control circuit is set according to temperature signal control machinery refrigeration
Standby closing.
By using above-mentioned technical proposal, warm water detection circuit is detected the water temperature of water outlet, in the water of water outlet
When temperature is unable to meet demand, the temperature signal control machinery refrigeration equipment that open control circuit is exported according to water temperature detection circuit opens
It is dynamic, low-temperature cold water is produced in time, and energy saving, when the water temperature of water outlet is met the requirements, closing control circuit is examined according to water temperature
The temperature signal control machinery refrigeration equipment of slowdown monitoring circuit output is closed, and the consumption of the energy is reduced.
Preferably, the water temperature detection circuit includes temperature sensor and the first amplifier, and first amplifier is to temperature
The output of degree sensor is amplified.
By using above-mentioned technical proposal, the first amplifier is amplified the output of temperature sensor, improves to small
The accuracy of detection of detection limit.
Preferably, the open control circuit includes first comparator, first switch part and the first relay, and described first
Temperature signal is compared by comparator with preset signals are opened, the output unlatching letter when temperature signal is more than and opens preset signals
Number, the first switch part is connected in response to open signal, and the first switch part is connected to the coil of the first relay
Power circuit, a normally opened contact of first relay are connected to the power circuit of mechanical refrigeration equipment, described first after
One normally opened contact of electric appliance is connected across first switch part.
By using above-mentioned technical proposal, in the water temperature over-high of water outlet, temperature signal, which is more than, opens preset signals, the
One comparator exports open signal, and the coil of the conducting of first switch part, the first relay is powered, first actuating of relay, often
Contact closure is opened, mechanical refrigeration equipment, which is powered, to be started, and produces low-temperature cold water, the first relay is connected across the normally opened of first switch part
Contact forms self-locking circuit, and for mechanical refrigeration equipment during producing low-temperature cold water, the coil of the first relay keeps logical
The state of electricity, mechanical refrigeration equipment stable operation.
Preferably, the closing control circuit include the second comparator, second switch part and the second relay, described second
Temperature signal is compared by comparator with preset signals are closed, the output closing letter when temperature signal is less than and closes preset signals
Number, the second switch part is connected in response to shutdown signal, and the second switch part is connected to the coil of the second relay
Power circuit, the normally-closed contact of second relay are connected to the power circuit of the coil of the first relay.
By using above-mentioned technical proposal, when mechanical refrigeration equipment starts simultaneously when the water temperature meet demand of water outlet, temperature
It spends signal and is less than closing preset signals, the second comparator exports shutdown signal, the conducting of second switch part, the coil of the second relay
It is powered, second actuating of relay, normally-closed contact disconnects, the coil blackout of the first relay, the normally opened contact of the first relay
It disconnects, mechanical refrigeration equipment stops.
Preferably, the water temperature detection circuit is connected with warning circuit, and the warning circuit is moved when temperature signal is excessive
Make.
By using above-mentioned technical proposal, water outlet when the temperature is excessively high, warning circuit action, remind staff and
When handling failure.
Preferably, the warning circuit includes third comparator, third switch member and buzzer, and the third comparator will
Temperature signal is compared with high temperature preset signals, and alarm signal is exported when temperature signal is more than high temperature preset signals, described
Third switch member is connected in response to alarm signal, and the third switch member is connected to the power circuit of buzzer.
By using above-mentioned technical proposal, in the water temperature over-high of water outlet, temperature signal is more than high temperature preset signals, the
Three comparators export alarm signal, the conducting of third switch member, and buzzer is powered, beeps and send out warning to staff,
With timely handling failure.
Preferably, further include flow rate detection circuit and shutting down control circuit, stream of the flow rate detection circuit to water outlet
Speed is detected and exports flow velocity signal, and the control circuit of shutting down is returned according to the energization of flow velocity signal control machinery refrigeration equipment
The disconnection on road.
It is too small in the water flow of water outlet by using above-mentioned technical proposal, control circuit is shut down according to flow velocity signal control
The power circuit of mechanical refrigeration equipment processed disconnects, and reduces the waste of the energy.
Preferably, the flow rate detection circuit includes flow sensor and the second amplifier, the second amplifier convection current
The output of fast sensor is amplified.
By using above-mentioned technical proposal, the second amplifier is amplified the output of flow sensor, improves to small
The accuracy of detection of detection limit.
Preferably, it is described shut down control circuit include the 4th comparator, the 4th switch member and the 4th relay, the described 4th
Flow velocity signal is compared by comparator with low speed preset signals, is exported when flow velocity signal is less than low speed preset signals and is shut down letter
Number, the 4th switch member is connected in response to shutting down signal, and the 4th switch member is connected to the coil of the 4th relay
The normally-closed contact of power circuit, the 4th relay is connected to the power circuit of mechanical refrigeration equipment.
By using above-mentioned technical proposal, when the water flow of water outlet is too small, flow velocity signal is less than low speed preset signals,
Signal is shut down in the output of 4th comparator, and the coil of the conducting of the 4th switch member, the 4th relay is powered, the 4th actuating of relay, the
The normally-closed contact of four relays disconnects, and disconnects the power circuit of mechanical refrigeration equipment, reduces the waste of the energy.
In conclusion the utility model has the advantages that：When the water temperature of water outlet is unable to meet demand, open
Mechanical refrigeration equipment starts, and produces low-temperature cold water in time, energy saving, when the water temperature of water outlet is met the requirements, mechanical refrigeration
Equipment is closed, and reduces the consumption of the energy, and when the water flow of water outlet is too small, and the energization for disconnecting mechanical refrigeration equipment is returned
The waste of the energy is reduced on road.
Description of the drawings
Fig. 1 is the functional block diagram of the present embodiment；
Fig. 2 is the circuit connection diagram of temperature sensor in the present embodiment；
Fig. 3 is the circuit connection diagram of flow sensor in the present embodiment；
Fig. 4 is the circuit connection diagram of mechanical refrigeration equipment in the present embodiment.
Reference numeral：1, mechanical refrigeration equipment；2, temperature sensor；3, the first amplifier；4, first comparator；5, first
Switch member；6, the first relay；7, the second comparator；8, second switch part；9, the second relay；10, third comparator；11、
Third switch member；12, buzzer；13, flow sensor；14, the second amplifier；15, the 4th comparator；16, the 4th switch member；
17, the 4th relay；18, water temperature detection circuit；19, open control circuit；20, closing control circuit；21, warning circuit；22、
Flow rate detection circuit；23, control circuit is shut down.
Specific implementation mode
The utility model is described in further detail below in conjunction with attached drawing.
Following specific examples is only the explanation to the utility model, is not limitations of the present invention, this
Field technology personnel can as needed make the present embodiment the modification of not creative contribution after reading this specification,
But as long as all being protected by Patent Law in the right of following utility model.
A kind of handpiece Water Chilling Units, as shown in Figure 1, including water temperature detection circuit 18, open control circuit 19, closing control circuit
20, warning circuit 21, mechanical refrigeration equipment 1, flow rate detection circuit 22 and control circuit 23 is shut down.
Water temperature detection circuit 18 is used to detect the leaving water temperature and output temperature signal of water outlet, open control circuit 19
According to the unlatching of temperature signal control machinery refrigeration equipment 1, closing control circuit 20 is according to temperature signal control machinery refrigeration equipment 1
Closing.
When the water temperature of water outlet is unable to meet demand, temperature that open control circuit 19 is exported according to water temperature detection circuit 18
It spends signal controlling machine tool refrigeration equipment 1 to start, produces low-temperature cold water in time, it is energy saving.
When the water temperature of water outlet is met the requirements, closing control circuit 20 is believed according to the temperature that water temperature detection circuit 18 exports
Number control machinery refrigeration equipment 1 is closed, and the consumption of the energy is reduced.
Water outlet when the temperature is excessively high, warning circuit 21 act, remind staff's timely processing failure.
It is too small in the water flow of water outlet, control circuit 23 is shut down according to the logical of flow velocity signal control machinery refrigeration equipment 1
Electrical circuit disconnects, and reduces the waste of the energy.
Water temperature detection circuit 18 includes temperature sensor 2 and the first amplifier 3 combined with Figure 1 and Figure 2, and the first amplifier 3 is right
The output of temperature sensor 2 is amplified and output temperature signal, improves the accuracy of detection to small detection limit.
Open control circuit 19 includes first comparator 4, first switch part 5 and the first relay 6, wherein first comparator
4 electrode input end is connected to the output end of the first amplifier 3, and the negative input of first comparator 4 is electrically connected to there is current potential
Two fixing ends of the movable end of device RP1, potentiometer RP1 connect power supply VCC and ground connection through resistance respectively, and power supply VCC is through current potential
Device RP1 is that first comparator 4 provides unlatching preset signals, and first comparator 4 compares temperature signal with preset signals are opened
Compared with, the open signal of output high level when temperature signal is more than and opens preset signals, the output end electrical connection of first comparator 4
In the base stage of first switch part 5, first switch part 5 is the triode of NPN type, the emitter resistance grounded of first switch part 5,
The collector of first switch part 5 is electrically connected to the coil K1 of the first relay 6, and the coil K1 of the first relay 6 is opened far from first
The end for closing part 5 connects power supply VCC, and a normally opened contact K1-2 of first switch part 5 is connected across the collector of first switch part 5
And emitter, a normally opened contact K1-1 of the first relay 6 are connected to the power circuit of mechanical refrigeration equipment 1（See Fig. 4）.
In the water temperature over-high of water outlet, temperature signal, which is more than, opens preset signals, and first comparator 4 exports high level
Open signal, first switch part 5 are connected, and the coil K1 of the first relay 6 is powered, the action of the first relay 6, normally opened contact
K1-1 is closed, and mechanical refrigeration equipment 1, which is powered, to be started, and produces low-temperature cold water, the first relay 6 is connected across the normal of first switch part 5
It opens contact K1-2 and forms self-locking circuit, mechanical refrigeration equipment 1 is during producing low-temperature cold water, the line of the first relay 6
The state that circle K1 is remained powered on, 1 stable operation of mechanical refrigeration equipment.
Open control circuit 19 includes the second comparator 7, second switch part 8 and the second relay 9, wherein the second comparator
7 negative input is connected to the output end of the first amplifier 3, and the electrode input end of the second comparator 7 is electrically connected to there is current potential
Two fixing ends of the movable end of device RP2, potentiometer RP2 connect power supply VCC and ground connection through resistance respectively, and power supply VCC is through current potential
Device RP2 is that the second comparator 7 provides closing preset signals, and the second comparator 7 compares temperature signal with preset signals are closed
Compared with, the shutdown signal of output high level when temperature signal is less than and closes preset signals, the output end electrical connection of the second comparator 7
In the base stage of second switch part 8, second switch part 8 is the triode of NPN type, the emitter resistance grounded of second switch part 8,
The collector of second switch part 8 is electrically connected to the coil K2 of the second relay 9, and the coil K2 of the second relay 9 is opened far from second
The end for closing part 8 connects power supply VCC, and the normally-closed contact K2-1 of the second relay 9 is connected to the coil K1 and electricity of the first relay 6
Between the VCC of source.
When mechanical refrigeration equipment 1 starts simultaneously when the water temperature meet demand of water outlet, temperature signal, which is less than, closes default letter
Number, the second comparator 7 exports shutdown signal, and second switch part 8 is connected, and the coil K2 of the second relay 9 is powered, the second relay
9 actions, normally-closed contact K2-1 are disconnected, the coil K1 power-off of the first relay 6, the normally opened contact K1-1 of the first relay 6 and
K1-2 is disconnected, and mechanical refrigeration equipment 1 stops.
Warning circuit 21 includes third comparator 10, third switch member 11 and buzzer 12, the anode of third comparator 10
Input terminal is connected to the output end of the first amplifier 3, and the negative input of third comparator 10 is electrically connected to have potentiometer RP3's
Two fixing ends of movable end, potentiometer RP3 connect power supply VCC through resistance respectively and ground connection, power supply VCC are through potentiometer RP3
Third comparator 10 provides high temperature preset signals, and temperature signal is compared by third comparator 10 with high temperature preset signals,
Temperature signal exports the alarm signal of high level when being more than high temperature preset signals, the output end of third comparator 10 is electrically connected to the
The base stage of three switch members 11, third switch member 11 be NPN type triode, the emitter resistance grounded of third switch member 11,
Buzzer 12 is connected between the collector of third switch member 11 and power supply VCC.
In the water temperature over-high of water outlet, temperature signal is more than high temperature preset signals, the output warning letter of third comparator 10
Number, third switch member 11 is connected, and buzzer 12 is powered, and beeps and sends out warning to staff, with timely handling failure.
In conjunction with Fig. 1 and Fig. 3, flow rate detection circuit 22 includes flow sensor 13 and the second amplifier 14, the second amplifier
The output of 14 pairs of flow sensors 13 is amplified, and improves the accuracy of detection to small detection limit.
It includes the 4th comparator 15, the 4th switch member 16 and the 4th relay 17 to shut down control circuit 23, wherein the 4th ratio
Compared with the output end that the electrode input end of device 15 is connected to the second amplifier 14, the negative input of the 4th comparator 15 be electrically connected with
There are the movable end of potentiometer RP4, two fixing ends of potentiometer RP4 to connect power supply VCC and ground connection, power supply VCC through resistance respectively
It is that the 4th comparator 15 provides low speed preset signals through potentiometer RP4, temperature signal and low speed are preset letter by the 4th comparator 15
Number be compared, export the open signal of high level when temperature signal is more than low speed preset signals, the 4th comparator 15 it is defeated
Outlet is electrically connected to the base stage of the 4th switch member 16, and the 4th switch member 16 is the triode of NPN type, the transmitting of the 4th switch member 16
The collector of pole resistance grounded, the 4th switch member 16 is electrically connected to the coil K4 of the 4th relay 17, the 4th relay 17
Ends of the coil K4 far from the 4th switch member 16 connects power supply VCC, and the normally opened contact K4-1 of the 4th relay 17 is connected to machinery
The power circuit of refrigeration equipment 1（See Fig. 4）.
When the water flow of water outlet is too small, flow velocity signal is less than low speed preset signals, and the output of the 4th comparator 15 is shut down
The coil K4 of signal, the conducting of the 4th switch member 16, the 4th relay 17 is powered, the action of the 4th relay 17, the 4th relay 17
Normally-closed contact K4-1 disconnect, disconnect the power circuit of mechanical refrigeration equipment 1, reduce the waste of the energy.
Specific work process：When the water temperature of water outlet is unable to meet demand, opens mechanical refrigeration equipment 1 and start, in time
Low-temperature cold water is produced, it is energy saving.
When the water temperature of water outlet is met the requirements, mechanical refrigeration equipment 1 is closed, and the consumption of the energy is reduced.
And when the water flow of water outlet is too small, the power circuit of mechanical refrigeration equipment 1 is disconnected, the wave of the energy is reduced
Take.
In the water temperature over-high of water outlet, buzzer 12 is powered, and beeps and sends out warning to staff, with timely
Handling failure.
Claims (9)
1. a kind of handpiece Water Chilling Units include the water outlet and mechanical refrigeration equipment (1) of the outflow of cooling water, it is characterized in that：Further include water
Temperature detector slowdown monitoring circuit (18), open control circuit (19) and closing control circuit (20), the water temperature detection circuit (18) is for examining
The leaving water temperature and output temperature signal at the mouth of a river are measured, the open control circuit (19) is freezed according to temperature signal control machinery
The unlatching of equipment (1), the closing control circuit (20) is according to the closing of temperature signal control machinery refrigeration equipment (1).
2. a kind of handpiece Water Chilling Units according to claim 1, it is characterized in that：The water temperature detection circuit (18) includes that temperature passes
Sensor (2) and the first amplifier (3), first amplifier (3) are amplified the output of temperature sensor (2).
3. a kind of handpiece Water Chilling Units according to claim 2, it is characterized in that：The open control circuit (19) includes the first ratio
Compared with device (4), first switch part (5) and the first relay (6), temperature signal and unlatching are preset letter by the first comparator (4)
It number is compared, being more than the when of opening preset signals in temperature signal exports open signal, and the first switch part (5) is in response to opening
Open signal and be connected, the first switch part (5) is connected to the power circuit of the coil of the first relay (6), described first after
One normally opened contact of electric appliance (6) is connected to the power circuit of mechanical refrigeration equipment (1), one of first relay (6)
Normally opened contact is connected across first switch part (5).
4. a kind of handpiece Water Chilling Units according to claim 3, it is characterized in that：The closing control circuit (20) includes the second ratio
Compared with device (7), second switch part (8) and the second relay (9), temperature signal and closing are preset letter by second comparator (7)
It number is compared, being less than the when of closing preset signals in temperature signal exports shutdown signal, and the second switch part (8) is in response to closing
Close signal and be connected, the second switch part (8) is connected to the power circuit of the coil of the second relay (9), described second after
The normally-closed contact of electric appliance (9) is connected to the power circuit of the coil of the first relay (6).
5. a kind of handpiece Water Chilling Units according to claim 1, it is characterized in that：The water temperature detection circuit (18) is connected with warning
Circuit (21), the warning circuit (21) act when temperature signal is excessive.
6. a kind of handpiece Water Chilling Units according to claim 5, it is characterized in that：The warning circuit (21) includes third comparator
(10), third switch member (11) and buzzer (12), the third comparator (10) by temperature signal and high temperature preset signals into
Row compares, and alarm signal is exported when temperature signal is more than high temperature preset signals, the third switch member (11) is in response to warning
Signal and be connected, the third switch member (11) is connected to the power circuit of buzzer (12).
7. a kind of handpiece Water Chilling Units according to claim 2, it is characterized in that：Further include flow rate detection circuit (22) and shuts down control
Circuit (23) processed, the flow rate detection circuit (22) is detected the flow velocity of water outlet and exports flow velocity signal, described to shut down
Control circuit (23) is according to the disconnection of the power circuit of flow velocity signal control machinery refrigeration equipment (1).
8. a kind of handpiece Water Chilling Units according to claim 7, it is characterized in that：The flow rate detection circuit (22) includes that flow velocity passes
Sensor (13) and the second amplifier (14), second amplifier (14) are amplified the output of flow sensor (13).
9. a kind of handpiece Water Chilling Units according to claim 7, it is characterized in that：The control circuit (23) of shutting down includes the 4th ratio
Compared with device (15), the 4th switch member (16) and the 4th relay (17), the 4th comparator (15) is pre- with low speed by flow velocity signal
If signal is compared, is exported when flow velocity signal is less than low speed preset signals and shut down signal, the 4th switch member (16) is rung
Ying Yu is shut down signal and is connected, and the 4th switch member (16) is connected to the power circuit of the coil of the 4th relay (17), institute
The normally-closed contact for stating the 4th relay (17) is connected to the power circuit of mechanical refrigeration equipment (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721831051.4U CN207849841U (en) | 2017-12-25 | 2017-12-25 | A kind of handpiece Water Chilling Units |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721831051.4U CN207849841U (en) | 2017-12-25 | 2017-12-25 | A kind of handpiece Water Chilling Units |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207849841U true CN207849841U (en) | 2018-09-11 |
Family
ID=63418289
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721831051.4U Expired - Fee Related CN207849841U (en) | 2017-12-25 | 2017-12-25 | A kind of handpiece Water Chilling Units |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207849841U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109916079A (en) * | 2019-02-21 | 2019-06-21 | 上海庄昊电热电器有限公司 | A kind of SMART FLUID formula electric heating case |
-
2017
- 2017-12-25 CN CN201721831051.4U patent/CN207849841U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109916079A (en) * | 2019-02-21 | 2019-06-21 | 上海庄昊电热电器有限公司 | A kind of SMART FLUID formula electric heating case |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180911 |