CN217900217U - Water cooling machine - Google Patents
Water cooling machine Download PDFInfo
- Publication number
- CN217900217U CN217900217U CN202221962683.5U CN202221962683U CN217900217U CN 217900217 U CN217900217 U CN 217900217U CN 202221962683 U CN202221962683 U CN 202221962683U CN 217900217 U CN217900217 U CN 217900217U
- Authority
- CN
- China
- Prior art keywords
- water
- controller
- pipeline
- circulation system
- electrically connected
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model discloses a cold water machine, include flow sensor and the controller that carries out the detection to the flow in the water circulating system, water pump and flow sensor are connected to the controller electricity. After the controller in software engineer to the hardware architecture programs, operating personnel uses the utility model discloses a cooling water machine is for generating heat the cooling, water circulation system's water flows out from the outlet pipe and gets into in the piece that generates heat, absorb the heat in the piece that generates heat and flow back to water circulation system in after heaing up, this in-process, controller control flow sensor detects the flow in the water circulation system, when water circulation system leads to the flow to change because of pipe blockage or pipe leakage, flow sensor sends the regulation signal to the controller, thereby the controller adjusts water circulation system's flow in real time according to the rotational speed that the regulation signal comes the adjustment water pump, realize the constant current water supply, operating personnel just can come the temperature of accurate control piece that generates heat through this cooling water machine.
Description
Technical Field
The utility model relates to a refrigeration plant technical field, concretely relates to cold water machine.
Background
The water chiller can cool a heating element, the water chiller comprises a water circulation system, a refrigeration circulation system and a heat exchanger, the water circulation system comprises a water outlet pipe connected with a water inlet of the heating element, a water pump pumping water towards the water outlet pipe and a water return pipe connected with a water outlet of the heating element, the refrigeration circulation system comprises a compressor, a condenser, common equipment in the refrigeration field such as an expansion valve and a liquid storage tank, the heat exchanger comprises a hot flow pipe and a cold flow pipe, the water circulation system is connected with the hot flow pipe of the heat exchanger, the refrigeration circulation system is connected with the cold flow pipe of the heat exchanger, the water pump of the water circulation system pumps water towards the water outlet pipe, the water pumped towards the water outlet pipe enters the heating element, the temperature of the heating element is raised after the heat of the heating element is absorbed, the water after temperature is returned into the water circulation system through the water return pipe and then flows through the hot flow pipe of the heat exchanger, the heat is transferred to the refrigeration circulation system through the heat exchanger to be cooled, the cooled water enters the water pump after being cooled, the water enters the water pump towards the water outlet pipe again, and the circulation system, and the water is circulated in the process. The water just enters the heating element, the temperature difference between the water and the heating element is large, the heat absorption is fast, and the temperature difference between the water and the heating element is gradually reduced and the heat absorption is slow after the water absorbs heat and is heated in the heating element. In a certain time, the larger the amount of water entering the heating member, the larger the amount of water having a large temperature difference with the heating member, and naturally, the larger the amount of heat the heating member absorbs, the faster the temperature of the heating member drops. The workman controls water circulating system's flow through the rotational speed of control water pump, just can control the water yield that gets into in the piece that generates heat in the certain time to the control generates heat the temperature of piece, but in the reality, water circulating system's pipeline can be difficult to avoid appearing blockking up or leaking, leads to water circulating system's flow to change, makes the workman can not the accurate temperature of controlling the piece that generates heat.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a hardware structure of cold water machine for software engineer to make software engineer program the back to the controller in this hardware structure, operating personnel can use this cold water machine to come the accurate temperature that controls the piece that generates heat.
For solving the technical problem, the utility model discloses a water chiller, including water circulating system, refrigeration cycle system and heat exchanger, water circulating system includes the outlet pipe that the cooling water flows out, the wet return of heat supply water backward flow and the water pump of concatenating between outlet pipe and wet return, the water pump is toward outlet pipe pump water, the heat exchanger has heat flow pipe and cold flow pipe, the heat flow pipe of heat exchanger concatenates between water circulating system's outlet pipe and wet return, concatenate with the water pump, the cold flow pipe of heat exchanger connects in refrigeration cycle system, flow sensor and controller including carrying out the flow that detects to the flow in the water circulating system, water pump and flow sensor are connected to the controller electricity.
Furthermore, the flow sensor is specifically arranged on a pipeline between the water return pipe and the hot flow pipe of the heat exchanger.
Still further, the heat exchanger is in particular a plate heat exchanger and/or the flow sensor is in particular a turbine flow sensor.
Furthermore, a heater for heating the water in the water circulation system is connected between the water pump and the water outlet pipe in series, and the controller is electrically connected with the heater.
Further:
a first temperature sensor for detecting the water temperature in the water circulation system is arranged on a pipeline between the water pump and the water outlet pipe, and the controller is electrically connected with the first temperature sensor; and/or
And a second temperature sensor for detecting the water temperature in the water circulation system is arranged on a pipeline between the water pump and the water return pipe, and the controller is electrically connected with the second temperature sensor.
Furthermore, the water pump is connected in series between the hot flow pipe and the water outlet pipe of the heat exchanger, an expansion water tank for replenishing water for the pipeline of the water circulation system and a liquid injection port are arranged on the pipeline between the water pump and the hot flow pipe of the heat exchanger, and a ball valve for closing the liquid injection port in a normal state is arranged at the liquid injection port.
Further:
a first pressure sensor for detecting the water pressure in the water circulation system is arranged on a pipeline between the water pump and the water outlet pipe, the controller is electrically connected with the first pressure sensor, and the first pressure sensor is an exposed pressure gauge; and/or
And a second pressure sensor for detecting the water pressure in the water circulation system is arranged on a pipeline between the water pump and the water return pipe, the controller is electrically connected with the second pressure sensor, and the second pressure sensor is an exposed pressure gauge.
Further:
a Y-shaped filter for filtering impurities in the water circulation system is connected in series between the water pump and the water outlet pipe; and/or
A first automatic exhaust valve for exhausting the pipeline of the water circulation system is arranged on the pipeline between the water pump and the water outlet pipe; and/or
A second automatic exhaust valve for exhausting the pipeline of the water circulation system is arranged on the pipeline between the water pump and the water return pipe; and/or
A first temperature sensor for detecting the water temperature in the water circulation system is arranged on a pipeline between the water pump and the water outlet pipe, and the controller is electrically connected with the first temperature sensor; and/or
A second temperature sensor for detecting the water temperature in the water circulation system is arranged on a pipeline between the water pump and the water return pipe, and the controller is electrically connected with the second temperature sensor; and/or
A first pressure sensor for detecting the water pressure in the water circulation system is arranged on a pipeline between the water pump and the water outlet pipe, the controller is electrically connected with the first pressure sensor, and the first pressure sensor is an exposed pressure gauge; and/or
And a second pressure sensor for detecting the water pressure in the water circulation system is arranged on a pipeline between the water pump and the water return pipe, the controller is electrically connected with the second pressure sensor, and the second pressure sensor is an exposed pressure gauge.
Furthermore, the refrigeration cycle system comprises a liquid storage device, a compressor, a condenser and an expansion valve which are sequentially connected in series, and a cold flow pipe of the heat exchanger is connected in series between the liquid storage device and the expansion valve; the expansion valve is an electronic expansion valve, and the controller is electrically connected with the expansion valve; the controller is electrically connected to the compressor and the condenser.
Further:
a drying filter for filtering impurities of the refrigeration cycle system is connected in series between the condenser and the expansion valve; and/or
A third temperature sensor for detecting the temperature of the refrigerant in the refrigeration cycle system is arranged on a pipeline between the liquid storage device and the compressor, and the controller is electrically connected with the third temperature sensor; and/or
A fourth temperature sensor for detecting the temperature of the refrigerant in the refrigeration cycle system is arranged on a pipeline between the compressor and the condenser, and the controller is electrically connected with the fourth temperature sensor; and/or
A low-pressure sensor for detecting the pressure of the refrigerant positioned at the low-pressure side of the compressor is arranged on a pipeline between the liquid storage device and the compressor, and the controller is electrically connected with the low-pressure sensor; and/or
A high-pressure sensor for detecting the pressure of the refrigerant positioned on the high-pressure side of the compressor is arranged on a pipeline between the compressor and the condenser, and the controller is electrically connected with the high-pressure sensor.
After the controller in software engineer to the hardware architecture programs, operating personnel uses the utility model discloses a cooling water machine is for generating heat the cooling, water circulation system's water flows out from the outlet pipe and gets into in the piece that generates heat, absorb the heat in the piece that generates heat and flow back to water circulation system in after heaing up, this in-process, controller control flow sensor detects the flow in the water circulation system, when water circulation system leads to the flow to change because of pipe blockage or pipe leakage, flow sensor sends the regulation signal to the controller, thereby the controller adjusts water circulation system's flow in real time according to the rotational speed that the regulation signal comes the adjustment water pump, realize the constant current water supply, operating personnel just can come the temperature of accurate control piece that generates heat through this cooling water machine.
Drawings
Fig. 1 is a schematic diagram of a water chiller.
Fig. 2 is an isometric view of a water chiller.
Detailed Description
The invention is described in further detail below with reference to specific embodiments.
Referring to fig. 1, the water chiller comprises a water circulation system 1 and a refrigeration circulation system 2, the water circulation system 1 comprises a water outlet pipe 12, a Y-shaped filter 19, a water pump 13 and a water return pipe 11 which are sequentially connected in series, the refrigeration circulation system 2 comprises five common devices in the refrigeration field, namely a liquid storage 21, a compressor 22, a condenser 23, a drying filter 25 and an electronic expansion valve 24 which are sequentially connected in series, refrigerant liquid is stored in the liquid storage 21, and the drying filter 25 can filter impurities in a pipeline of the refrigeration circulation system. The water cooler comprises a plate type heat exchanger 3, the heat exchanger 3 is provided with a hot flow pipe 31 and a cold flow pipe 32, the hot flow pipe 31 is connected in series between a water pump 13 and a water return pipe 11 of the water circulation system 1, and the cold flow pipe 32 is connected in series between a liquid storage device 21 and an electronic expansion valve 24 of the refrigeration circulation system 2. A first automatic exhaust valve 41 is arranged on the pipeline between the water outlet pipe 12 of the water circulation system 1 and the Y-shaped filter 19, and a second automatic exhaust valve 42 is arranged on the pipeline between the water pump 13 of the water circulation system 1 and the water return pipe 11. When an operator uses the water cooling machine to cool a heating part, a water outlet pipe 12 of the water circulation system 1 is connected with a water inlet of the heating part, a water return pipe 11 of the water circulation system 1 is connected with a water outlet of the heating part, then a water pump 13 is used for pumping cold water to the water outlet pipe 12, impurities are filtered out of the cold water through a Y-shaped filter 19, then the cold water is exhausted through a first automatic exhaust valve 41, the cold water flows out of the water circulation system 1 from the water outlet pipe 12 and enters the heating part, heat of the heating part is absorbed in the heating part to cool the heating part, the cold water absorbs heat and is heated to form hot water and then flows back to the water circulation system 1 from the water return pipe 11, the returned hot water is exhausted through a second automatic exhaust valve 42, then flows through a hot flow pipe 31 of a heat exchanger 3, the heat is transferred to the refrigeration circulation system 2 through the heat exchanger 3 to dissipate heat and cool the cold water, and then returns to the water pump 13 again, and the circulation is carried out.
Referring to fig. 1, a turbine flow sensor 14 is arranged on a pipeline between a water return pipe 11 and a hot flow pipe 31 of a heat exchanger 3, the water chiller includes a controller (not shown in the figure), the controller is electrically connected with the flow sensor 14 and a water pump 13, the flow sensor 14 is controlled to detect the flow in the water circulation system 1, when the flow of the water circulation system 1 changes due to pipeline blockage or pipeline leakage, the flow sensor 14 sends an adjusting signal to the controller, the controller adjusts the rotating speed of the water pump 13 according to the adjusting signal so as to adjust the flow of the water circulation system 1, constant-flow water supply is realized, and an operator can accurately control the temperature of a heating element through the water chiller.
Referring to fig. 1, a heater 15 is connected in series between a water pump 13 and a Y-shaped filter 19, a first temperature sensor 43 is disposed on a pipe between the Y-shaped filter 19 and a water outlet pipe 12, and a second temperature sensor 44 is disposed on a pipe between a flow sensor 14 and a water return pipe 11. The controller is electrically connected to the heater 15, the first temperature sensor 43, and the second temperature sensor 44 in the water circulation system 1, and is also electrically connected to the compressor 22, the condenser 23, and the electronic expansion valve 24 in the refrigeration circulation system 2. The controller controls the first temperature sensor 43 and the second temperature sensor 44 to detect the water temperature in the water circulation system 1, when the first temperature sensor 43 and the second temperature sensor 44 detect that the water temperature in the water circulation system 1 is higher than 5 degrees and lower than 18 degrees, the controller sends a suitable temperature signal to the controller, the controller receives the suitable temperature signal to control the refrigeration circulation system 2 to stop so as to save energy, when the first temperature sensor 43 and the second temperature sensor 44 detect that the water temperature in the water circulation system 1 is lower than 5 degrees, the controller sends an over-low temperature signal to the controller, and when the controller receives the over-low temperature signal, the controller controls the heater 15 to heat the water in the water circulation system 1 so as to prevent the pipeline of the water circulation system 1 from being frozen due to over-low water temperature.
Referring to fig. 1 and 2, a first pressure gauge 45 is exposed on a pipe between the Y-filter 19 and the first temperature sensor 43, a second pressure gauge 46 is exposed on a pipe between the flow sensor 14 and the second temperature sensor 44, and the first pressure gauge 45 and the second pressure gauge 46 are respectively used as pressure sensors to detect the water pressure of the water circulation system 1. The controller is electrically connected with the first pressure gauge 45 and the second pressure gauge 46, when the first pressure gauge 45 and the second pressure gauge 46 detect that the water pressure is higher than a preset value, the controller sends a water pressure overhigh signal to the controller, and the controller receives the water pressure overhigh signal and controls the water chilling machine to stop so that an operator can overhaul the water chilling machine. An expansion water tank 16 is arranged on a pipeline between the water pump 13 and the hot flow pipe 31 of the heat exchanger 3, and the expansion water tank 16 automatically replenishes water for the pipeline of the water circulation system 1 when the water pressure of the water circulation system 1 is too low. A liquid filling port 17 is arranged on a pipeline between the expansion water tank 16 and the water pump 13, a ball valve 18 for normally closing the liquid filling port 17 is arranged at the liquid filling port 17, if the water pressure of the water circulation system 1 is too low after water is filled in the expansion water tank 16, an operator connects a water filling pipe (not shown in the figure) at the liquid filling port 17, and then opens the ball valve 18 to allow the water filling pipe to fill water into the water circulation system through the liquid filling port 17, so that water can be filled in the pipeline of the water circulation system 1.
Referring to fig. 1, a third temperature sensor 26 is disposed on a pipe between the compressor 22 and the accumulator 21, a fourth temperature sensor 27 is disposed on a pipe between the compressor 22 and the condenser 23, and the controller electrically connects the third temperature sensor 26 and the fourth temperature sensor 27, controls the third temperature sensor 26 to detect the temperature of the refrigerant on the low pressure side of the compressor 22, and controls the fourth temperature sensor 27 to detect the temperature of the refrigerant on the high pressure side of the compressor 22. When detecting that the temperature of the refrigerant is too high or too low, the third temperature sensor 26 and the fourth temperature sensor 27 send temperature abnormal signals to the controller, and the controller receives the temperature abnormal signals to control the compressor 22 to reduce the rotation speed, and after the rotation speed is reduced for a period of time, if the temperature is still abnormal, the controller controls the water chiller to stop so that an operator can overhaul the water chiller.
Referring to fig. 1, a low pressure sensor 28 is disposed on a pipe between the compressor 22 and the accumulator 21, a high pressure sensor 29 is disposed on a pipe between the compressor 22 and the condenser 23, and the controller is electrically connected to the low pressure sensor 28 and the high pressure sensor 29, and controls the low pressure sensor 28 to detect a pressure of the refrigerant at a low pressure side of the compressor 22 and the high pressure sensor 29 to detect a pressure of the refrigerant at a high pressure side of the compressor 22. When the low pressure sensor 28 and the high pressure sensor 29 detect that the pressure is too high, the over-pressure signals are sent to the controller, and the controller receives the over-pressure signals to control the water chiller to stop so that an operator can overhaul the water chiller.
The above description is only the embodiments of the present invention, and the scope of protection is not limited thereto. The invention is not limited to the above embodiments, but may be modified within the scope of the appended claims.
Claims (10)
1. Water chiller, including water circulating system, refrigeration cycle system and heat exchanger, water circulating system includes the outlet pipe that supplies cold water outflow, the wet return of confession hot water backward flow and concatenate the water pump between outlet pipe and wet return, the water pump is toward outlet pipe pump water, the heat exchanger has hot flow pipe and cold flow pipe, the hot flow pipe of heat exchanger concatenates between water circulating system's outlet pipe and wet return, concatenates with the water pump, the cold flow pipe of heat exchanger connects in refrigeration cycle system, its characterized in that: the water pump flow sensor is electrically connected with the water pump and the flow sensor.
2. The water chiller of claim 1, wherein: the flow sensor is specifically arranged on a pipeline between the water return pipe and the hot flow pipe of the heat exchanger.
3. The water chiller of claim 1, wherein: the heat exchanger is in particular a plate heat exchanger and/or the flow sensor is in particular a turbine flow sensor.
4. The water chiller of claim 1, wherein: a heater for heating the water in the water circulation system is connected in series between the water pump and the water outlet pipe, and the controller is electrically connected with the heater.
5. The water chiller of claim 4, wherein:
a first temperature sensor for detecting the water temperature in the water circulation system is arranged on a pipeline between the water pump and the water outlet pipe, and the controller is electrically connected with the first temperature sensor; and/or
And a second temperature sensor for detecting the water temperature in the water circulation system is arranged on a pipeline between the water pump and the water return pipe, and the controller is electrically connected with the second temperature sensor.
6. The water chiller of claim 1, wherein: the water pump is connected in series between a hot flow pipe and a water outlet pipe of the heat exchanger, an expansion water tank for replenishing water for a pipeline of a water circulation system and a liquid injection port are arranged on a pipeline between the water pump and the hot flow pipe of the heat exchanger, and a ball valve for closing the liquid injection port in a normal state is installed at the liquid injection port.
7. The water chiller of claim 6, wherein:
a first pressure sensor for detecting the water pressure in the water circulation system is arranged on a pipeline between the water pump and the water outlet pipe, the controller is electrically connected with the first pressure sensor, and the first pressure sensor is an exposed pressure gauge; and/or
And a second pressure sensor for detecting the water pressure in the water circulation system is arranged on a pipeline between the water pump and the water return pipe, the controller is electrically connected with the second pressure sensor, and the second pressure sensor is an exposed pressure gauge.
8. The water chiller according to any one of claims 1 to 3, wherein:
a Y-shaped filter for filtering impurities in the water circulation system is connected in series between the water pump and the water outlet pipe; and/or
A first automatic exhaust valve for exhausting the pipeline of the water circulation system is arranged on the pipeline between the water pump and the water outlet pipe; and/or
A second automatic exhaust valve for exhausting the pipeline of the water circulation system is arranged on the pipeline between the water pump and the water return pipe; and/or
A first temperature sensor for detecting the water temperature in the water circulation system is arranged on a pipeline between the water pump and the water outlet pipe, and the controller is electrically connected with the first temperature sensor; and/or
A second temperature sensor for detecting the water temperature in the water circulation system is arranged on a pipeline between the water pump and the water return pipe, and the controller is electrically connected with the second temperature sensor; and/or
A first pressure sensor for detecting the water pressure in the water circulation system is arranged on a pipeline between the water pump and the water outlet pipe, the controller is electrically connected with the first pressure sensor, and the first pressure sensor is an exposed pressure gauge; and/or
And a second pressure sensor for detecting the water pressure in the water circulation system is arranged on a pipeline between the water pump and the water return pipe, the controller is electrically connected with the second pressure sensor, and the second pressure sensor is an exposed pressure gauge.
9. The water chiller of claim 1, wherein: the refrigeration cycle system comprises a liquid storage device, a compressor, a condenser and an expansion valve which are sequentially connected in series, and a cold flow pipe of the heat exchanger is connected in series between the liquid storage device and the expansion valve; the expansion valve is an electronic expansion valve, and the controller is electrically connected with the expansion valve; the controller is electrically connected to the compressor and the condenser.
10. The water chiller of claim 9, wherein:
a drying filter for filtering impurities of the refrigeration cycle system is connected in series between the condenser and the expansion valve; and/or
A third temperature sensor for detecting the temperature of the refrigerant in the refrigeration cycle system is arranged on a pipeline between the liquid storage device and the compressor, and the controller is electrically connected with the third temperature sensor; and/or
A fourth temperature sensor for detecting the temperature of the refrigerant in the refrigeration cycle system is arranged on a pipeline between the compressor and the condenser, and the controller is electrically connected with the fourth temperature sensor; and/or
A low-pressure sensor for detecting the pressure of the refrigerant positioned on the low-pressure side of the compressor is arranged on a pipeline between the liquid storage device and the compressor, and the controller is electrically connected with the low-pressure sensor; and/or
A high-pressure sensor for detecting the pressure of the refrigerant positioned on the high-pressure side of the compressor is arranged on a pipeline between the compressor and the condenser, and the controller is electrically connected with the high-pressure sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221962683.5U CN217900217U (en) | 2022-07-26 | 2022-07-26 | Water cooling machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221962683.5U CN217900217U (en) | 2022-07-26 | 2022-07-26 | Water cooling machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217900217U true CN217900217U (en) | 2022-11-25 |
Family
ID=84135762
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221962683.5U Active CN217900217U (en) | 2022-07-26 | 2022-07-26 | Water cooling machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217900217U (en) |
-
2022
- 2022-07-26 CN CN202221962683.5U patent/CN217900217U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101222331B1 (en) | Heat-pump hot water apparatus | |
| CN106766376A (en) | A kind of source pump adjusting method, device and air-conditioning | |
| CN109539380A (en) | A kind of Teat pump boiler compressor frequency control method | |
| CN102914107B (en) | Heat energy recovery control method for refrigeration system | |
| CN208477398U (en) | A kind of cooling height temp controller of high-precision second level | |
| CN217900217U (en) | Water cooling machine | |
| CN103294086B (en) | Constant-temperature liquid circulating device and temperature-controlling method | |
| JP5088783B2 (en) | Energy-saving control operation method and apparatus for vapor absorption refrigerator | |
| CN210463650U (en) | Precise temperature control system for circulating high-low temperature liquid of barrel pump | |
| CN109974320B (en) | High-temperature deionized water cooling device | |
| CN107221356A (en) | Suitable for the closed-loop recirculatory mixing wastewater with air cooling system of fusion reactor hot environment | |
| US6749016B2 (en) | Brine temperature control apparatus using a three-way proportional valve | |
| CN208128727U (en) | A kind of cold plate temperature regulating device | |
| JP3660961B2 (en) | Refrigeration equipment | |
| CN108495526A (en) | The cold liquid supply system of self-adaptive temperature | |
| CN206449935U (en) | A kind of auxiliary hot energy-saving heat-exchange system of frozen water machine | |
| CN115266110A (en) | Quick cold and hot impact engine test testing machine | |
| JP2904525B2 (en) | Method of controlling refrigerant flow rate in heat pump air conditioner and heat pump air conditioner | |
| CN111473657A (en) | Anti-freezing system and method for direct air-cooling condenser | |
| CN217423745U (en) | Oil temperature control system | |
| CN207365487U (en) | A kind of cooling-water machine | |
| CN106152583B (en) | A kind of High-precision temperature control type heat exchange system | |
| JP3651370B2 (en) | Refrigeration equipment | |
| CN219572322U (en) | High-precision small-sized refrigerating device | |
| CN220710418U (en) | Refrigerating and heating device for energy storage battery temperature control system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |