KR101809792B1 - Sensor for detecting pressure of refrigerant - Google Patents

Sensor for detecting pressure of refrigerant Download PDF

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Publication number
KR101809792B1
KR101809792B1 KR1020150124960A KR20150124960A KR101809792B1 KR 101809792 B1 KR101809792 B1 KR 101809792B1 KR 1020150124960 A KR1020150124960 A KR 1020150124960A KR 20150124960 A KR20150124960 A KR 20150124960A KR 101809792 B1 KR101809792 B1 KR 101809792B1
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KR
South Korea
Prior art keywords
cable
sensor
refrigerant
epoxy
sensor package
Prior art date
Application number
KR1020150124960A
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Korean (ko)
Other versions
KR20170028101A (en
Inventor
김태호
유동현
마이클
김태윤
Original Assignee
암페놀센싱코리아 유한회사
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Priority to KR1020150124960A priority Critical patent/KR101809792B1/en
Publication of KR20170028101A publication Critical patent/KR20170028101A/en
Application granted granted Critical
Publication of KR101809792B1 publication Critical patent/KR101809792B1/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
    • G01L19/06—Means for preventing overload or deleterious influence of the measured medium on the measuring device or vice versa
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/32—Cooling devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D29/00—Arrangement or mounting of control or safety devices
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
    • G01L19/0061—Electrical connection means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
    • G01L19/06—Means for preventing overload or deleterious influence of the measured medium on the measuring device or vice versa
    • G01L19/0627—Protection against aggressive medium in general
    • G01L19/0654—Protection against aggressive medium in general against moisture or humidity
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
    • G01L19/06—Means for preventing overload or deleterious influence of the measured medium on the measuring device or vice versa
    • G01L19/0681—Protection against excessive heat

Abstract

The present invention relates to a pressure sensor for measuring the pressure of a refrigerant in a vehicle air conditioner or a refrigerator. More particularly, the present invention relates to a pressure sensor in which a sensor package (3) 5, the sensor package 5 of the PCB supporter 10 and the cable 6 are covered and reinforced by an epoxy injection method and a fixed cover, The present invention solves the conventional problem that the cable is broken due to friction occurring at the contact portion between the cable and the epoxy seal due to the vibration in the low temperature environment, Thereby improving the durability and the reliability.

Description

TECHNICAL FIELD [0001] The present invention relates to a pressure sensor,

The present invention relates to a pressure sensor for measuring the pressure of a refrigerant in a vehicle air conditioner or a refrigerator. More particularly, the present invention relates to a pressure sensor, And more particularly, to a cable clamping type pressure sensor for measuring a refrigerant, which improves durability by preventing direct damage by direct transmission of vibration or direct exposure to external environment (low temperature and high temperature, humidity).

Generally, in a cooling system applied to a vehicle air conditioner or a refrigerator, refrigerant is used for generation of cold air.

That is, the cooling system condenses and expands the refrigerant as a heat exchange medium, circulates the refrigerant in a reduced temperature state, and generates cold air.

The cooling system includes a compressor for compressing a refrigerant, a condenser for condensing the refrigerant compressed in the compressor, an expansion valve for rapidly expanding the refrigerant condensed and liquefied in the condenser, and a condenser for expanding the refrigerant expanded in the expansion valve And an evaporator that generates cold air by using the latent heat of evaporation of the refrigerant while evaporating.

If the phase change of the refrigerant in the cooling system described above (change to gas, liquid, liquid or gas) and circulation of the refrigerant are not smooth, the cooling system can not function.

Therefore, a pressure sensor for measuring the refrigerant is connected to an arbitrary position of the refrigerant pipe through which the refrigerant is circulated, and the pressure of the refrigerant is measured and controlled.

As shown in Fig. 1, the pressure sensor for measuring a refrigerant used in this way

A sensor package 5 connected to a coupling recess 4a of the PCB supporter is incorporated into the PCB supporter 4 at the tip of the sensor body 3 to which the refrigerant pipe 2 is coupled, The connection portion between the sensor package 5 and the cable 6 is reinforced by the epoxy seal 8 formed by filling the recess 4a with an epoxy resin.

However, in the conventional pressure sensor described above, when the sensor is exposed to a vibration of the cooked system or an external environment (low temperature, high temperature, humidity) for a long time, cracks are generated in the epoxy seal 8 and moisture and foreign matter penetrate into the crack Thereby causing a problem of lowering reliability.

In addition, there is a problem that the cables are disconnected due to the friction between the cable 6 and the epoxy seal 8 due to the vibration of the low temperature environment.

Patent Document 1: Registration No. 10-0725894 Patent Document 2: Registration No. 10-1506802

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems of the prior art, and it is an object of the present invention to cover and strengthen the connection part between a sensor package and a cable embedded in a PCB supporter by an epoxy injection method and a fixing method using a fixed cover, And to improve the durability by preventing damage due to direct exposure of the battery or direct exposure of the external environment (low temperature, high temperature, and humidity).

The sensor package includes a sensor package coupled to a distal end of a sensor body to which a refrigerant pipe is coupled and a cable connected to the sensor package. The sensor package and the cable connection portion are connected to each other through an epoxy injection space A PCB supporter for forming a semicircular sleeve groove into which a cable is inserted at one side of the epoxy injection space; And a fixed cover which is detachably coupled to the PCB supporter to cover the sensor package and the cable connection portion, and a semicircular sleeve groove is formed at a position above the semicircular sleeve groove of the PCB supporter at one side to press-fix the cable.

According to an embodiment of the present invention, at least one fixing protrusion protruding in the circumferential direction is formed inside the semicircular sleeve groove of the fixed cover to press and fix the outside of the cable.

According to the present invention, the stationary cover is structured such that side walls that are resiliently inward and outward are formed on both sides, and a locking protrusion is formed on the side wall, and the stationary cover is fixedly installed so as to be hooked on the support ribs formed on both sides of the PCB supporter.

The present invention covers a sensor package of a PCB supporter having a sensor package coupled to a tip of a sensor body to which a refrigerant pipe is coupled and having a cable therein, and a cable connection portion is covered by a fixing method using an epoxy injection method and a fixed cover It has an effect of improving the durability by preventing the direct transmission of vibration or the damage due to the direct exposure of the external environment (low temperature, high temperature, and humidity) as well as reinforcement.

That is, the problem of moisture and foreign matter infiltrating into a damaged portion of the conventional epoxy sealing conventionally causes various reliability deterioration is solved, and durability is improved.

In addition, since the present invention solves the conventional problem that the cable is broken due to the friction generated in the contact area between the cable and the epoxy seal due to vibration in a low temperature environment, the reliability of the pressure sensor is improved along with the durability of the pressure sensor, thereby maximizing the commerciality of the pressure sensor.

1 is a cross-sectional view showing a pressure sensor connected and assembled with a conventional refrigerant pipe;
2 is an exploded perspective view of the pressure sensor of the present invention.
Fig. 3 is a perspective view of the fixed cover disassembled state of Fig. 2; Fig.
4 is a front sectional view of the pressure sensor of the present invention.
5 is a front elevational sectional view of the lap portion of the fixed cover disassembled state of Fig.
6 is a bottom view of the fixed cover of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 2 to FIG. 6, the cable fixing type pressure sensor for measuring refrigerant of the present invention is configured to apply the epoxy injection method and the cable fixing method together.

That is, the present invention includes a sensor package 5 coupled to a front end of a sensor body 3 to which a refrigerant pipe 2 is coupled and a cable 6 connected to the sensor package 5, ) Is formed by an epoxy injection space part (11) for reinforcing a connection part by an epoxy seal (12) formed by epoxy injection and a semicircular sleeve groove (15) into which a cable (6) is inserted at one side of the epoxy injection space part A PCB supporter (10);

A semicircular sleeve groove 25 is formed at a position above the semicircular sleeve groove 15 of the PCB supporter 10 on one side so as to cover the connection portion between the sensor package 5 and the cable 6, And a fixed cover 20 for pressing and fixing the cable 6.

At least one fixing protrusion 26 protruding in the circumferential direction is formed in the semicircular sleeve groove 25 of the fixed cover 20 to press and fix the outside of the cable 6.

That is, the fixed connection of the cable 6 not only prevents transmission of external or system vibration transmitted to the cable to the sensor package 5, but also prevents friction between the cable 6 and the epoxy seal 12 .

The fixed cover 20 is formed with side walls 21 and 21 'which are resiliently inward and outward on both sides of the fixed cover 20 and have hooking protrusions 21a and 21'a formed on the side walls 21 and 21' 13 'formed on both sides of the PCB supporter 10 so as to be fixedly installed.

The sensor package 5 is composed of a PCB and an ASIC element, and a membrane is inserted between the sensor body 3 and the PCB supporter 10.

And reference numeral 14 denotes a support jaw protruding from the upper side of the upper part of the PCB.

Hereinafter, the operation and operation of the present invention will be described.

The cable fixing type pressure sensor for measuring refrigerant of the present invention is characterized in that a sensor package 5 to which a cable 6 is connected is inserted into a PCB supporter 10 coupled to the front end of a sensor body 3, To protect them by a combination of the two.

A sensor package 5 in which a cable 6 is connected is installed inside an epoxy injection space 11 in a PCB supporter 10 and the cable 6 is inserted into the epoxy injection space And inserted into a semicircular sleeve groove 15 formed on one side.

In this state, epoxy is injected into the epoxy injection space 11 of the PCB supporter 10 to the upper part of the sensor package 5 to form the epoxy seal 12, so that the connection between the sensor package 5 and the cable 6 Thereby preventing exposure to the external environment.

In this state, the fixed cover 20 is coupled to the upper part of the PCB supporter 10 so as to cover the upper part of the PCB supporter.

At this time, the engaging protrusions 21a and 21'a of the side walls are elastically moved in the lateral direction of the PCB supporter 10 by the elastic action of the side walls 21 and 21 ' And is fixedly coupled to the support jaws 13 and 13 '.

A semicircular sleeve groove 25 formed at a position above the semicircular sleeve groove 15 of the PCB supporter is formed on one side of the lower portion of the fixed cover 20 so as to cover the upper portion of the cable 6 inserted into the semicircular sleeve groove 15 of the PCB supporter. So as to be prevented from moving.

Particularly, the fixing projections 26 are protruded in the circumferential direction on the inner side of the semicircular sleeve groove 25 of the fixed cover 20 so as to further press the cable 6 to the outside of the cable 6, thereby firmly fixing the cable 6 .

The connection part between the sensor package 5 installed in the epoxy injection space part 11 of the PCB supporter 10 and the cable 6 is connected to the epoxy sealing part 11 injected into the epoxy injection space part 11 12 and the fixed cover 20 coupled to the upper part of the PCB supporter, as well as to prevent the direct transmission of the vibration or the damage due to the direct exposure of the external environment (low temperature, high temperature, and humidity).

Particularly, the cable 6 connected to the sensor package 5 is pressed and fixed by the PCB supporter and the semicircular sleeve grooves 15 and 25 of the fixed cover so as to prevent movement, so that the vibration of the cable and the epoxy seal The durability is greatly improved as compared with the conventional technique, such as the problem of disconnection of the cable due to friction occurring at the contact portion.

5: Sensor package 6: Cable
10: PCB supporter 11: Epoxy injection space part
12: Epoxy seal 13, 13 ': Support jaw
15,25: Semicircular sleeve groove 20: Fixed cover
21, 21 'side walls 21a, 21'a:
26: Fixing projection

Claims (3)

The sensor package 5 is connected to the tip of the sensor body 3 to which the refrigerant pipe 2 is coupled and the cable 6 is connected to the sensor package 5, An epoxy injection space 11 for reinforcement by an epoxy seal 12 formed by epoxy injection and a semicircular sleeve groove 12 for inserting the cable 6 horizontally at one side of the epoxy injection space 11 A PCB supporter 10 formed of the grooves 15;
The semicircular sleeve groove 15 is formed at one side of the PCB supporter 10 so as to cover the connecting portion between the sensor package 5 and the cable 6, And a fixed cover (20) for pressing and fixing the cable (6) by forming a semicircular sleeve groove (25) so as to be located on the inner side rather than one side end,
The stationary cover 20 is formed with side walls 21 and 21 'that are resilient inward and outward on both sides thereof and engaging protrusions 21a and 21'a are formed on the side walls 21 and 21' (13 ') formed on both sides of the PCB supporter (10) so as to be fixedly installed.
The method according to claim 1,
Characterized in that at least one fixing protrusion (26) protruding in the circumferential direction is formed in the semicircular sleeve groove (25) of the fixed cover (20) so as to press and fix the outside of the cable (6) Fixed coupled pressure sensor.
delete
KR1020150124960A 2015-09-03 2015-09-03 Sensor for detecting pressure of refrigerant KR101809792B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150124960A KR101809792B1 (en) 2015-09-03 2015-09-03 Sensor for detecting pressure of refrigerant

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Application Number Priority Date Filing Date Title
KR1020150124960A KR101809792B1 (en) 2015-09-03 2015-09-03 Sensor for detecting pressure of refrigerant

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KR101809792B1 true KR101809792B1 (en) 2018-01-18

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108204877B (en) * 2017-06-01 2019-10-29 北京航空航天大学 A kind of blown using strut reduces the steady state pressure probe of strut blockage effect
KR102157526B1 (en) * 2019-03-13 2020-09-21 국방과학연구소 Motion assist apparatus

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004198394A (en) 2002-10-23 2004-07-15 Denso Corp Temperature sensor integrated pressure sensor unit
JP2010145193A (en) * 2008-12-18 2010-07-01 Nabtesco Corp Pressure sensor module and pressure detecting device
JP2014016332A (en) * 2012-06-11 2014-01-30 Saginomiya Seisakusho Inc Pressure sensor and method for manufacturing the pressure sensor
KR101486518B1 (en) 2013-08-06 2015-01-27 주식회사 코멧네트워크 Differential pressure sensor
KR101506802B1 (en) 2013-09-03 2015-03-30 에이에스텍 주식회사 Sensor for detecting pressure of refrigerant of airconditioner

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100725894B1 (en) 2005-11-28 2007-06-08 주식회사 애트랩 Pressure sensor and pressure measurement method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004198394A (en) 2002-10-23 2004-07-15 Denso Corp Temperature sensor integrated pressure sensor unit
JP2010145193A (en) * 2008-12-18 2010-07-01 Nabtesco Corp Pressure sensor module and pressure detecting device
JP2014016332A (en) * 2012-06-11 2014-01-30 Saginomiya Seisakusho Inc Pressure sensor and method for manufacturing the pressure sensor
KR101486518B1 (en) 2013-08-06 2015-01-27 주식회사 코멧네트워크 Differential pressure sensor
KR101506802B1 (en) 2013-09-03 2015-03-30 에이에스텍 주식회사 Sensor for detecting pressure of refrigerant of airconditioner

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