CN104460770A - Triple-temperature-protection patient warming system - Google Patents
Triple-temperature-protection patient warming system Download PDFInfo
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- CN104460770A CN104460770A CN201410532330.5A CN201410532330A CN104460770A CN 104460770 A CN104460770 A CN 104460770A CN 201410532330 A CN201410532330 A CN 201410532330A CN 104460770 A CN104460770 A CN 104460770A
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- temperature
- heating circuit
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- circuit
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Abstract
The invention discloses a triple-temperature-protection patient warming system which comprises a heating circuit and a hardware comparison circuit. The heating circuit is connected with a software control unit and a control relay, the hardware comparison circuit comprises a NTC, the voltage output end of the NTC is connected with a voltage comparer, and the voltage comparer is connected with a switching element of the heating circuit. The hardware comparison circuit is additionally arranged on the basis of software protection and thermal protector protection, so that the highest temperature of the patient warming system is controlled, and the temperature control precision and safety of the patient warming system are improved.
Description
Technical field
The present invention relates to a kind of Medical Devices, particularly relate to a kind of patient's heating system of triple temperature protection.
Background technology
Patient's heating system makes patient skin heat up at peri-operation period, insulation, the effectively generation of prevention hypothermia and complication thereof.
Patient's heating system is mainly used in department of anesthesia, operating room, ICU, blood dialysis room, gynemetrics, neonate department.
Patient's heating system of the prior art has 2 kinds of temperature protection: software protection and thermal protector protection, and because the precision of thermal protector is usually not high, when thermal protector can be caused to disconnect, the temperature difference opposite sex of patient's heating system is larger.
Summary of the invention
The object of this invention is to provide patient's heating system of triple temperature protection that a kind of temperature control precision is high, security is high.
The object of the invention is to be achieved through the following technical solutions:
Patient's heating system of triple temperature protection of the present invention, comprise heating circuit, described heating circuit is connected with software controlled unit and pilot relay, also comprise hardware comparison circuit, described hardware comparison circuit comprises NTC thermistor, the voltage output end of described NTC thermistor is connected with voltage comparator, and described voltage comparator is connected with the on-off element of described heating circuit;
When being heated to above design temperature, described software controlled unit closes described heating circuit;
Described pilot relay accepts the temperature control signals of thermal protector, and when described thermal protector disconnects because temperature raises, described pilot relay also will disconnect, and described heating circuit is closed;
After the temperature of described NTC thermistor is increased to and sets threshold value, its resistance is reduced to setting value, and the output of described voltage comparator becomes high level by low level, and this high level closes described heating circuit.
As seen from the above technical solution provided by the invention; patient's heating system of triple temperature protection that the embodiment of the present invention provides; owing to adding hardware comparison circuit while software protection and thermal protector protection; in order to control the maximum temperature of patient's heating system, improve temperature control precision and the security of patient's heating system.
Accompanying drawing explanation
The structural representation of patient's heating system of triple temperature protection that Fig. 1 provides for the embodiment of the present invention.
Embodiment
To be described in further detail the embodiment of the present invention below.
Patient's heating system of triple temperature protection of the present invention, its preferably embodiment be:
Comprise heating circuit, described heating circuit is connected with software controlled unit and pilot relay, also comprise hardware comparison circuit, described hardware comparison circuit comprises NTC thermistor, the voltage output end of described NTC thermistor is connected with voltage comparator, and described voltage comparator is connected with the on-off element of described heating circuit;
When being heated to above design temperature, described software controlled unit closes described heating circuit;
Described pilot relay accepts the temperature control signals of thermal protector, and when described thermal protector disconnects because temperature raises, described pilot relay also will disconnect, and described heating circuit is closed;
After the temperature of described NTC thermistor is increased to and sets threshold value, its resistance is reduced to setting value, and the output of described voltage comparator becomes high level by low level, and this high level closes described heating circuit.
Described NTC thermistor forms bridge-type with other three resistance and is connected, and the output terminal that described bridge-type connects is connected with described voltage comparator.
Described on-off element is relay.
Patient's heating system of triple temperature protection of the present invention, adds hardware comparison circuit, in order to control the maximum temperature of patient's heating system, improves the temperature control precision of patient's heating system while software protection and thermal protector protection.
Specific embodiment:
As shown in Figure 1, primarily of 3 part compositions:
Software controlled unit:
When being heated to above design temperature, being judged by program, closing heating circuit.
Hardware comparison circuit:
Negative temperature characteristic according to NTC thermistor 1: temperature is higher, resistance is less.Along with the rising of thermistor temp, the output of voltage comparator becomes high level by low level, and this high level closes heating circuit, thus effectively controls maximum temperature.
Thermal protection circuit:
Access a pilot relay at heating circuit, this relay is controlled by the signal of thermal protector.When thermal protector disconnects because temperature raises, relay also will disconnect, and heating circuit is closed.
The present invention effectively can control the maximum temperature of calandria, also the temperature control precision of calandria is improve more than 10 times.
The present invention relates to the maximum temperature realizing controlling patient's heating system, have employed triple temperature protection measure: software controlled unit, hardware comparison circuit, thermal protection circuit.
Software controlled unit first gathers the temperature value of mattress internal sensor, makes comparisons with the highest goal temperature that will control, if be greater than highest goal temperature, then stops heating immediately.
Hardware comparison circuit adopts the output of voltage comparator to go to control heating circuit, resistance value due to NTC thermistor raises along with temperature and reduces, utilize the voltage divider principle of resistance, voltage in NTC thermistor raises with temperature and reduces, select suitable comparative voltage, the output polarity of voltage comparator just can be made to change, thus control heating circuit.Control accuracy depends on the precision of resistance and voltage comparator, and its precision is significantly increased compared to the scheme of simple thermal protector.
Thermal protector can disconnect after reaching break-off signal automatically, thus heating circuit is also disconnected, and makes heating system stop heating, effectively controls the maximum temperature of heating system.
The above; be only the present invention's preferably embodiment, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.
Claims (3)
1. patient's heating system of a triple temperature protection, comprise heating circuit, described heating circuit is connected with software controlled unit and pilot relay, it is characterized in that, also comprise hardware comparison circuit, described hardware comparison circuit comprises NTC thermistor, and the voltage output end of described NTC thermistor is connected with voltage comparator, and described voltage comparator is connected with the on-off element of described heating circuit;
When being heated to above design temperature, described software controlled unit closes described heating circuit;
Described pilot relay accepts the temperature control signals of thermal protector, and when described thermal protector disconnects because temperature raises, described pilot relay also will disconnect, and described heating circuit is closed;
After the temperature of described NTC thermistor is increased to and sets threshold value, its resistance is reduced to setting value, and the output of described voltage comparator becomes high level by low level, and this high level closes described heating circuit.
2. patient's heating system of triple temperature protection according to claim 1, is characterized in that, described NTC thermistor forms bridge-type with other three resistance and is connected, and the output terminal that described bridge-type connects is connected with described voltage comparator.
3. patient's heating system of triple temperature protection according to claim 2, is characterized in that, described on-off element is relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410532330.5A CN104460770A (en) | 2014-10-10 | 2014-10-10 | Triple-temperature-protection patient warming system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410532330.5A CN104460770A (en) | 2014-10-10 | 2014-10-10 | Triple-temperature-protection patient warming system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104460770A true CN104460770A (en) | 2015-03-25 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410532330.5A Pending CN104460770A (en) | 2014-10-10 | 2014-10-10 | Triple-temperature-protection patient warming system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104460770A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107509259A (en) * | 2017-09-13 | 2017-12-22 | 广州龙之杰科技有限公司 | A kind of heating apparatus and method with self-lock protection function |
| CN108797058A (en) * | 2017-04-28 | 2018-11-13 | 青岛海尔洗衣机有限公司 | A kind of heater for clothes dryer temperature detection and protective device |
| CN109888717A (en) * | 2019-03-04 | 2019-06-14 | 上海沪工焊接集团股份有限公司 | A kind of temperature protection circuit of inverter type welder |
| CN110974522A (en) * | 2019-12-02 | 2020-04-10 | 北京英泰诺医疗科技有限公司 | Body temperature management system for patients in operation |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57114915A (en) * | 1981-01-08 | 1982-07-17 | Matsushita Electric Works Ltd | Temperature controller for heating element |
| CN201562953U (en) * | 2009-10-19 | 2010-08-25 | 广州市圣大电子有限公司 | Temperature protection circuit with software and hardware control function |
| CN103006373A (en) * | 2012-12-28 | 2013-04-03 | 天津海明医疗用品有限公司 | Intelligent medical warming blanket |
| CN202960894U (en) * | 2012-12-13 | 2013-06-05 | 镇江飞达医疗器材有限公司 | Carbon fiber patient warming system |
-
2014
- 2014-10-10 CN CN201410532330.5A patent/CN104460770A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57114915A (en) * | 1981-01-08 | 1982-07-17 | Matsushita Electric Works Ltd | Temperature controller for heating element |
| CN201562953U (en) * | 2009-10-19 | 2010-08-25 | 广州市圣大电子有限公司 | Temperature protection circuit with software and hardware control function |
| CN202960894U (en) * | 2012-12-13 | 2013-06-05 | 镇江飞达医疗器材有限公司 | Carbon fiber patient warming system |
| CN103006373A (en) * | 2012-12-28 | 2013-04-03 | 天津海明医疗用品有限公司 | Intelligent medical warming blanket |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108797058A (en) * | 2017-04-28 | 2018-11-13 | 青岛海尔洗衣机有限公司 | A kind of heater for clothes dryer temperature detection and protective device |
| CN107509259A (en) * | 2017-09-13 | 2017-12-22 | 广州龙之杰科技有限公司 | A kind of heating apparatus and method with self-lock protection function |
| CN109888717A (en) * | 2019-03-04 | 2019-06-14 | 上海沪工焊接集团股份有限公司 | A kind of temperature protection circuit of inverter type welder |
| CN110974522A (en) * | 2019-12-02 | 2020-04-10 | 北京英泰诺医疗科技有限公司 | Body temperature management system for patients in operation |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150325 |
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| RJ01 | Rejection of invention patent application after publication |