CN102022873A - Water flow adjusting device for refrigeration system of freeze-dryer - Google Patents
Water flow adjusting device for refrigeration system of freeze-dryer Download PDFInfo
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- CN102022873A CN102022873A CN 201010568055 CN201010568055A CN102022873A CN 102022873 A CN102022873 A CN 102022873A CN 201010568055 CN201010568055 CN 201010568055 CN 201010568055 A CN201010568055 A CN 201010568055A CN 102022873 A CN102022873 A CN 102022873A
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- water condenser
- water
- cooling water
- condenser
- control instrument
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Abstract
The invention relates to a water flow adjusting device for a refrigeration system of a freeze-dryer. The refrigeration system of the freeze-dryer comprises a water condenser and a cooling water pipeline respectively connected to an inlet and an outlet of the water condenser. The adjusting device comprises a valve having a motor-driven executing mechanism, an electronic pressure sensor and a PID control instrument, wherein the electronic pressure sensor is threaded to the water condenser for detecting the pressure value of the refrigeration agent in the water condenser and outputting a pressure signal, and an input end of the PID control instrument is connected to the electronic pressure sensor for receiving the pressure signal and outputting a PID signal. The device of the invention controls the cooling water flow in the cooling water pipeline at the inlet of the water condenser, and achieves the pressure balance of the refrigeration agent in the water condenser.
Description
Technical field
The present invention relates to pharmaceutical machine, relate in particular to the water flow regulating device that a kind of refrigerating system of freeze dryer is used.
Background technology
At present, the control method of cooling water adopts the mechanical pressure type flow control valve to realize in the water condenser of the refrigerating system of freeze dryer of external routine, the shortcoming of this method is as follows: 1, owing to the pipeline of pressure type flow adjustable valve and the refrigerant tubing of water condenser need be connected, therefore, quality requirement to flow control valve is very high, otherwise can increase the leakage point of cold-producing medium; 2, can't control the cooling water of low temperature; 3, maintenance difficult can not manual adjustments.Therefore, this control device can not satisfy user's demand.
Summary of the invention
In order to solve the problem that above-mentioned prior art exists, the present invention aims to provide the water flow regulating device that a kind of refrigerating system of freeze dryer is used, and with the open degree size of control water condenser import, reaches the effect of refrigerant pressure balance in the water condenser.
The water flow regulating device that a kind of refrigerating system of freeze dryer of the present invention is used, described refrigerating system of freeze dryer comprises water condenser and is connected to the cooling water pipeline of this water condenser import and export end, described adjusting device comprises valve, an electronic pressure transmitter and a PID (proportional integral) control instrument with electronic executing agency
Described electronic pressure transmitter is threaded with described water condenser, detects the force value of the cold-producing medium in the described water condenser, and exports a pressure signal;
The input of described PID control instrument is connected with described electronic pressure transmitter, receives described pressure signal, and exports a PID signal;
Described valve with electronic executing agency is arranged on the cooling water pipeline of described water condenser entrance point, and be connected with the output of described proportion control instrument, receive described PID signal, control the flow size of the interior cooling water of cooling water pipeline of described water condenser entrance point.
In the water flow regulating device that above-mentioned refrigerating system of freeze dryer is used, described PID control instrument receives described pressure signal, and shows the force value of the cold-producing medium in the described water condenser.
Owing to adopted above-mentioned technical solution, the present invention is by the electronic pressure transmitter on water condenser, thereby the refrigerant pressure of water condenser inside is fed back to the PID control instrument, export the PID signal to valve by the PID control instrument again with electronic executing agency, realization is to the control of the flow size of cooling water in the cooling water pipeline of water condenser entrance point, and reaches the pressure balanced effect of water condenser inner refrigerant.Because electronic pressure transmitter and water condenser employing is to be threaded among the present invention, therefore, has avoided the leakage of cold-producing medium fully; Nor be subjected to its temperature effect, can control the environment of low temperature.In addition, when the PID control instrument damaged, the valve with electronic executing agency among the present invention can manually open and close adjusting.The present invention also has advantages such as control accuracy height, cost be moderate.
Description of drawings
Fig. 1 is the scheme of installation of the water flow regulating device used of a kind of refrigerating system of freeze dryer of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing, specific embodiments of the invention are elaborated.
As shown in Figure 1, the present invention, it is the water flow regulating device that a kind of refrigerating system of freeze dryer is used, refrigerating system of freeze dryer 10 comprises water condenser 1 and is connected to the cooling water pipeline 2 of this water condenser 1 entrance point 11, the port of export 12, adjusting device comprises valve 5, an electronic pressure transmitter 3 and the PID control instrument 4 with electronic executing agency, wherein
Electronic pressure transmitter 3 is threaded with water condenser 1, detects the force value of the cold-producing medium in the water condenser 1, and exports a pressure signal;
The input of PID control instrument 4 is connected with electronic pressure transmitter 3, receives pressure signal, and exports a PID signal;
Valve 5 with electronic executing agency is arranged on the cooling water pipeline 2 of water condenser 1 entrance point 11, and be connected with the output of PID control instrument 4, receive the PID signal, the flow size of cooling water in the cooling water pipeline 2 of control water condenser 1 entrance point 11, and the force value of the cold-producing medium in the demonstration water condenser 1.
Operation principle of the present invention is as follows: by the electronic pressure transmitter on water condenser 13, thereby the refrigerant pressure of water condenser 1 inside is fed back to PID control instrument 4, give the valve 5 with electronic executing agency (valve 5 is by the 220V power supply power supply of freeze dryer master control cabinet output) by PID control instrument 4 output PID signals again, realization is to the control of the flow size of cooling waters in the cooling water pipeline 2 of water condenser 1 entrance point 11, and reaches the pressure balanced effect of water condenser 1 inner refrigerant.
Below embodiment has been described in detail the present invention in conjunction with the accompanying drawings, and those skilled in the art can make the many variations example to the present invention according to the above description.Thereby some details among the embodiment should not constitute limitation of the invention, and the scope that the present invention will define with appended claims is as protection scope of the present invention.
Claims (2)
1. water flow regulating device that refrigerating system of freeze dryer is used, described refrigerating system of freeze dryer comprises water condenser and is connected to the cooling water pipeline of this water condenser import and export end, it is characterized in that, described adjusting device comprises valve, an electronic pressure transmitter and the PID control instrument with electronic executing agency
Described electronic pressure transmitter is threaded with described water condenser, detects the force value of the cold-producing medium in the described water condenser, and exports a pressure signal;
The input of described PID control instrument is connected with described electronic pressure transmitter, receives described pressure signal, and exports a PID signal;
Described valve with electronic executing agency is arranged on the cooling water pipeline of described water condenser entrance point, and be connected with the output of described PID control instrument, receive described PID signal, control the flow size of the interior cooling water of cooling water pipeline of described water condenser entrance point.
2. the water flow regulating device that refrigerating system of freeze dryer according to claim 1 is used is characterized in that, described PID control instrument receives described pressure signal, and shows the force value of the cold-producing medium in the described water condenser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010568055 CN102022873A (en) | 2010-12-01 | 2010-12-01 | Water flow adjusting device for refrigeration system of freeze-dryer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010568055 CN102022873A (en) | 2010-12-01 | 2010-12-01 | Water flow adjusting device for refrigeration system of freeze-dryer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102022873A true CN102022873A (en) | 2011-04-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010568055 Pending CN102022873A (en) | 2010-12-01 | 2010-12-01 | Water flow adjusting device for refrigeration system of freeze-dryer |
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| Country | Link |
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| CN (1) | CN102022873A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999061135A1 (en) * | 1998-05-26 | 1999-12-02 | Atlas Copco Airpower, Naamloze Vennootschap | Method and device for cool-drying |
| CN201032306Y (en) * | 2007-04-11 | 2008-03-05 | 严清波 | Heat pump |
| CN101240962A (en) * | 2008-01-18 | 2008-08-13 | 西安交通大学 | Carbon dioxide heat pump control method based on pressure-temperature |
| CN101706187A (en) * | 2009-09-23 | 2010-05-12 | 上海共和真空技术有限公司 | Water flow regulating device for refrigerating system of freeze dryer |
| CN201892361U (en) * | 2010-12-01 | 2011-07-06 | 上海共和真空技术有限公司 | Water flow rate adjusting device of freezedryer refrigeration system |
-
2010
- 2010-12-01 CN CN 201010568055 patent/CN102022873A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999061135A1 (en) * | 1998-05-26 | 1999-12-02 | Atlas Copco Airpower, Naamloze Vennootschap | Method and device for cool-drying |
| CN201032306Y (en) * | 2007-04-11 | 2008-03-05 | 严清波 | Heat pump |
| CN101240962A (en) * | 2008-01-18 | 2008-08-13 | 西安交通大学 | Carbon dioxide heat pump control method based on pressure-temperature |
| CN101706187A (en) * | 2009-09-23 | 2010-05-12 | 上海共和真空技术有限公司 | Water flow regulating device for refrigerating system of freeze dryer |
| CN201892361U (en) * | 2010-12-01 | 2011-07-06 | 上海共和真空技术有限公司 | Water flow rate adjusting device of freezedryer refrigeration system |
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Application publication date: 20110420 |