CN213873292U - Novel throttling conversion device suitable for double cold source units - Google Patents

Novel throttling conversion device suitable for double cold source units Download PDF

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Publication number
CN213873292U
CN213873292U CN202022818049.1U CN202022818049U CN213873292U CN 213873292 U CN213873292 U CN 213873292U CN 202022818049 U CN202022818049 U CN 202022818049U CN 213873292 U CN213873292 U CN 213873292U
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China
Prior art keywords
valve
solenoid valve
cold water
evaporimeter
compressor
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CN202022818049.1U
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Chinese (zh)
Inventor
冯胜健
徐岩岩
张正鹏
王明洋
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Qingdao Aolikai Energy Co.,Ltd.
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Qingdao Alkkt Central Air Conditioner Co ltd
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Abstract

The utility model relates to an air conditioning technology field just discloses a novel throttle conversion equipment suitable for two cold source units, including the evaporimeter, the left surface of evaporimeter is equipped with cold water supply and cold water return, cold water supply and cold water return all are linked together with the evaporimeter, the bottom of evaporimeter is connected with the fourth solenoid valve, the other end of fourth solenoid valve is connected with vapour and liquid separator. This novel throttle conversion equipment suitable for two cold source units, according to the ambient temperature's of unit operation difference, through first series connection branch road, the cooperation work of second series connection branch road and third series connection branch road, make same refrigerating system of unit compressor and refrigerant circulating pump sharing, refrigerate throughout the year, thereby make unit operation ambient temperature scope broader, refrigerant route conversion when carrying out refrigerant pump circulation through relay type pressure switch, control is simple, the reliability is high, make the unit can be more safe efficient steady operation.

Description

Novel throttling conversion device suitable for double cold source units
Technical Field
The utility model relates to an air conditioning technology field specifically is a novel throttle conversion equipment suitable for two cold source units.
Background
The water system of air conditioner is formed from compressor, condenser, throttle device, evaporator and refrigerant, and is characterized by that the high-temperature high-pressure gas of refrigerant (refrigerant) discharged from compressor can be passed through the condenser, cooled and depressurized, the condenser can be used for transferring heat into cooling tower by means of cooling water system and discharging, and the refrigerant can be continuously flowed through throttle device, formed into low-temperature low-pressure liquid, passed through evaporator, absorbed heat and compressed. The two ends of the evaporator are connected with chilled water circulating systems, the temperature of the chilled water is reduced by the heat absorbed by the refrigerant at this time, so that the low-temperature water flows to a user end, and then the low-temperature water is subjected to heat exchange through the see-through coil pipe to blow out cold air. However, the existing throttling conversion devices are only used for throttling and pressure reducing adjustment by using an electronic expansion valve, the throttling pressure difference is large, and the refrigeration cycle using two modes of compressor refrigeration and refrigerant circulating pump refrigeration cannot be simultaneously met.
SUMMERY OF THE UTILITY MODEL
The utility model provides a not enough to prior art, the utility model provides a novel throttle conversion equipment suitable for two cold source units possesses same refrigerating system of unit compressor and refrigerant circulating pump sharing, carries out year-round refrigeration, and the broader advantage of unit operational environment temperature range has solved and has used electronic expansion valve to carry out the throttle step-down regulation alone, and throttle pressure differential is great, can't satisfy the refrigeration cycle's of using compressor refrigeration and refrigerant circulating pump refrigeration dual mode simultaneously problem.
The utility model provides a following technical scheme: a novel throttling conversion device suitable for a double-cold-source unit comprises an evaporator, wherein cold water supply and cold water return are arranged on the left side surface of the evaporator and are communicated with the evaporator, a fourth electromagnetic valve is connected to the bottom of the evaporator, a gas-liquid separator is connected to the other end of the fourth electromagnetic valve, a compressor is connected to the other end of the gas-liquid separator, a third one-way valve is connected to the other end of the compressor, a condenser is connected to the other end of the third one-way valve, a fan is arranged at one end of the condenser, a liquid accumulator is connected to the other end of the condenser, a switch is connected to the other end of the liquid accumulator, a refrigerant circulating pump is connected to the other end of the switch, a third electromagnetic valve and a relay type pressure switch are connected to the other end of the refrigerant circulating pump, an electronic expansion valve is connected to the other end of the third electromagnetic valve, the other end of electronic expansion valve is linked together with the evaporimeter, relay type pressure switch's the other end is connected with second solenoid valve and first solenoid valve, the other end and the evaporimeter of first solenoid valve are linked together, the other end of second solenoid valve is connected with throttling arrangement, throttling arrangement's the other end is connected with first check valve, the other end and the evaporimeter of first check valve are linked together, first series branch is constituteed to electronic expansion valve and third solenoid valve, relay type pressure switch, second solenoid valve, throttling arrangement, first check valve constitution second series branch, relay type pressure switch and first solenoid valve constitution third series branch, first series branch, second series branch and third series branch are parallelly connected each other.
Preferably, a filter is connected between the reservoir and the switch.
Preferably, a second check valve is connected in parallel to a serial branch composed of the fourth solenoid valve, the gas-liquid separator, the compressor and the third check valve.
Compared with the prior art, the utility model discloses possess following beneficial effect:
1. this novel throttle conversion equipment suitable for two cold source units, according to the ambient temperature's of unit operation difference, through the cooperation work of first series branch road, second series branch road and third series branch road, make same refrigerating system of unit compressor and refrigerant circulating pump sharing, refrigerate throughout the year to make unit operation ambient temperature scope broader.
2. This novel throttle conversion equipment suitable for two cold source units carries out refrigerant pump circulation time refrigerant route conversion through relay type pressure switch, and control is simple, and the reliability is high for the unit can be more safe efficient steady operation.
Drawings
Fig. 1 is a schematic view of the present invention.
In the figure: 1. a first solenoid valve; 2. a first check valve; 3. an electronic expansion valve; 4. a throttling device; 5. a second solenoid valve; 6. a third electromagnetic valve; 7. a relay type pressure switch; 8. a refrigerant circulating pump; 9. a switch; 10. a reservoir; 11. a filter; 12. a condenser; 13. a fan; 14. a third check valve; 15. a second one-way valve; 16. a compressor; 17. supplying cold water; 18. an evaporator; 19. returning cold water; 20. a fourth solenoid valve; 21. a gas-liquid separator.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, a novel throttling conversion device suitable for a dual-cold-source unit comprises an evaporator 18, a cold water supply 17 and a cold water return 19 are arranged on the left side surface of the evaporator 18, the cold water supply 17 and the cold water return 19 are both communicated with the evaporator 18, low-temperature chilled water flowing out of the evaporator 18 is pressurized by a refrigerating pump and is sent into a room through the cold water supply 17 for heat exchange to take away heat in the room, and finally returns to the cold water return 19, an indoor fan is matched to work to blow air through a chilled water pipeline to reduce air temperature and accelerate indoor heat exchange, a fourth electromagnetic valve 20 is connected to the bottom of the evaporator 18, a gas-liquid separator 21 is connected to the other end of the fourth electromagnetic valve 20, a compressor 16 is connected to the other end of the gas-liquid separator 21, a third one-way valve 14 is connected to the other end of the compressor 16, a second one-way valve 15 is connected in parallel to a serial branch consisting of the fourth electromagnetic valve 20, the gas-liquid separator 21, the compressor 16 and the third one-way valve 14, the other end of the third one-way valve 14 is connected with a condenser 12, heat taken away from a room enters a gas-liquid separator 21, after gas-liquid separation, high-temperature and high-pressure gas coming out of a compressor 16 flows through the condenser 12 to be cooled and depressurized, the condenser brings the heat to a cooling tower through a cooling water system to be discharged, one end of the condenser 12 is provided with a fan 13, the other end of the condenser 12 is connected with a liquid accumulator 10, the other end of the liquid accumulator 10 is connected with a switch 9, a filter 11 is connected between the liquid accumulator 10 and the switch 9, the other end of the switch 9 is connected with a refrigerant circulating pump 8, the other end of the refrigerant circulating pump 8 is connected with a third electromagnetic valve 6 and a relay type pressure switch 7, refrigerant channels are switched when the refrigerant pump circulation is carried out through the relay type pressure switch 7, the control is simple, the reliability is high, and the unit can run stably with higher safety and high efficiency, the other end of the third electromagnetic valve 6 is connected with an electronic expansion valve 3, the other end of the electronic expansion valve 3 is communicated with an evaporator 18, the other end of the relay type pressure switch 7 is connected with a second electromagnetic valve 5 and a first electromagnetic valve 1, the other end of the first electromagnetic valve 1 is communicated with the evaporator 18, the other end of the second electromagnetic valve 5 is connected with a throttling device 4, the other end of the throttling device 4 is connected with a first one-way valve 2, the other end of the first one-way valve 2 is communicated with the evaporator 18, a refrigerant flows through the throttling device 4 to become low-temperature low-pressure liquid, then flows through the evaporator 18 to absorb heat, the electronic expansion valve 3 and the third electromagnetic valve 6 form a first series branch, the relay type pressure switch 7, the second electromagnetic valve 5, the throttling device 4 and the first one-way valve 2 form a second series branch, the relay type pressure switch 7 and the first electromagnetic valve 1 form a third series branch, the first series branch, the second series branch and the third series branch are connected in parallel, if the highest ambient temperature of the unit operation is H1, the ambient temperature point of the switching between the compressor and the refrigerant circulating pump is H2, the lowest ambient temperature of the unit operation is H3, the unit operation ambient temperature is H, the relay type pressure switch 7 is opened at the pressure P1 corresponding to the evaporation pressure value required by refrigeration, the reset pressure is P2, when H2 is not less than H1 and not more than H1, the unit starts the compressor 16 to perform refrigeration cycle, the refrigerant circulating pump 8 is closed, at this time, because the pressure is higher when the compressor 16 operates, the relay type pressure switch 7 is closed, the third electromagnetic valve 6 is opened, the first electromagnetic valve 1 and the second electromagnetic valve 5 are closed, the regulation is carried out through the electronic expansion valve 3, the refrigeration purpose is realized, when H3 is not less than H2, the operation range of the compressor 16 is exceeded, at this time, the compressor 16 is closed, refrigerant circulating pump 8 is opened to perform fluorine pump circulation, at this time, first electromagnetic valve 1 and third electromagnetic valve 6 are closed, second electromagnetic valve 5 is opened, and adjustment is performed through throttling device 4, so that the refrigeration purpose is achieved, along with the gradual reduction of unit operation environment temperature H, the refrigerant outlet pressure is still greater than H3, when the refrigerant outlet pressure of condenser 12 is lower than relay type pressure switch 7 disconnection pressure P1, relay type pressure switch 7 is opened, through the relay action, second electromagnetic valve 5 is closed, first electromagnetic valve 1 is opened, at this time, the refrigerant is not required to be throttled and adjusted, the refrigeration requirement can be met, when the unit operation environment temperature H gradually rises, the refrigerant outlet pressure of condenser 12 is higher than relay type pressure switch 7 reset pressure P2, relay type pressure switch 7 is closed, through the relay action, second electromagnetic valve 5 is opened, first electromagnetic valve 1 is closed, the throttling device 4 is used for adjusting to complete circulation and achieve a refrigeration effect, and the compressor and the refrigerant circulating pump of the unit share the same refrigeration system to carry out year-round refrigeration through the matching work of the first series branch, the second series branch and the third series branch according to the difference of the ambient temperature of the unit in operation, so that the unit is wider in operation ambient temperature range.
The working principle is as follows: the highest ambient temperature of unit operation is set to be H1, the ambient temperature point of switching between the compressor and the refrigerant circulating pump is set to be H2, the lowest ambient temperature of unit operation is set to be H3, and the ambient temperature of unit operation is set to be H. The relay type pressure switch 7 is opened, the pressure is the evaporation pressure value corresponding to the refrigeration requirement of P1, and the reset pressure is P2.
When H is not less than H2 and not more than H1, the unit starts the compressor 16 to perform refrigeration cycle, the refrigerant circulating pump 8 is closed, at this time, because the pressure is higher when the compressor 16 operates, the relay type pressure switch 7 is closed, the third electromagnetic valve 6 is opened, the first electromagnetic valve 1 and the second electromagnetic valve 5 are closed, and the refrigeration purpose is realized by adjusting the electronic expansion valve 3.
And when the H is not less than H3 and not more than H2, the operation range of the compressor 16 is exceeded, the compressor 16 is closed at the moment, the refrigerant circulating pump 8 is started to perform fluorine pump circulation, at the moment, the first electromagnetic valve 1 and the third electromagnetic valve 6 are closed, the second electromagnetic valve 5 is opened, and the adjustment is performed through the throttling device 4, so that the refrigeration purpose is realized.
Along with the gradual reduction of the unit operating environment temperature H, the unit operating environment temperature H is still greater than H3, when the refrigerant outlet pressure of the condenser 12 is lower than the relay type pressure switch 7 disconnection pressure P1, the relay type pressure switch 7 is disconnected, the relay acts to close the second electromagnetic valve 5, the first electromagnetic valve 1 is opened, and at the moment, the refrigerant does not need to be throttled and regulated, so that the refrigeration requirement can be met.
When the unit operation environment temperature H gradually rises, the refrigerant outlet pressure of the condenser 12 is higher than the reset pressure P2 of the relay type pressure switch 7, the relay type pressure switch 7 is closed, the relay acts to open the second electromagnetic valve 5, the first electromagnetic valve 1 is closed, the throttling device 4 is used for adjusting, circulation is completed, and the refrigeration effect is achieved.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (3)

1. A novel throttling conversion device suitable for a double-cold-source unit comprises an evaporator (18), and is characterized in that: the left side surface of the evaporator (18) is provided with a cold water supply (17) and a cold water return (19), the cold water supply (17) and the cold water return (19) are communicated with the evaporator (18), the bottom of the evaporator (18) is connected with a fourth electromagnetic valve (20), the other end of the fourth electromagnetic valve (20) is connected with a gas-liquid separator (21), the other end of the gas-liquid separator (21) is connected with a compressor (16), the other end of the compressor (16) is connected with a third one-way valve (14), the other end of the third one-way valve (14) is connected with a condenser (12), one end of the condenser (12) is provided with a fan (13), the other end of the condenser (12) is connected with a liquid accumulator (10), the other end of the liquid accumulator (10) is connected with a switch (9), and the other end of the switch (9) is connected with a refrigerant circulating pump (8), the other end of refrigerant circulating pump (8) is connected with third solenoid valve (6) and relay type pressure switch (7), the other end of third solenoid valve (6) is connected with electronic expansion valve (3), the other end and evaporimeter (18) of electronic expansion valve (3) are linked together, the other end of relay type pressure switch (7) is connected with second solenoid valve (5) and first solenoid valve (1), the other end and evaporimeter (18) of first solenoid valve (1) are linked together, the other end of second solenoid valve (5) is connected with throttling arrangement (4), the other end of throttling arrangement (4) is connected with first check valve (2), the other end and evaporimeter (18) of first check valve (2) are linked together, first series branch road is constituteed to electronic expansion valve (3) and third solenoid valve (6), relay type pressure switch (7), Second series branch is constituteed to second solenoid valve (5), throttling arrangement (4), first check valve (2), relay type pressure switch (7) and first solenoid valve (1) constitute third series branch, first series branch, second series branch and third series branch are parallelly connected each other.
2. The novel throttling conversion device suitable for the double-cold-source unit as claimed in claim 1, wherein: a filter (11) is connected between the liquid storage device (10) and the switch (9).
3. The novel throttling conversion device suitable for the double-cold-source unit as claimed in claim 1, wherein: and a second one-way valve (15) is connected in parallel to a serial branch consisting of the fourth electromagnetic valve (20), the gas-liquid separator (21), the compressor (16) and the third one-way valve (14).
CN202022818049.1U 2020-11-30 2020-11-30 Novel throttling conversion device suitable for double cold source units Active CN213873292U (en)

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CN202022818049.1U CN213873292U (en) 2020-11-30 2020-11-30 Novel throttling conversion device suitable for double cold source units

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Application Number Priority Date Filing Date Title
CN202022818049.1U CN213873292U (en) 2020-11-30 2020-11-30 Novel throttling conversion device suitable for double cold source units

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114217679A (en) * 2021-11-29 2022-03-22 北京微焓科技有限公司 Heat dissipation system and case

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114217679A (en) * 2021-11-29 2022-03-22 北京微焓科技有限公司 Heat dissipation system and case

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Address after: No.958, Ming'an Road, Huangdao District, Qingdao City, Shandong Province 266000

Patentee after: Qingdao Aolikai Energy Co.,Ltd.

Address before: No.958, Ming'an Road, Huangdao District, Qingdao City, Shandong Province 266000

Patentee before: QINGDAO ALKKT CENTRAL AIR CONDITIONER CO.,LTD.