CN211011807U - Anti-freezing control system of high-temperature air conditioner - Google Patents
Anti-freezing control system of high-temperature air conditioner Download PDFInfo
- Publication number
- CN211011807U CN211011807U CN201921705103.2U CN201921705103U CN211011807U CN 211011807 U CN211011807 U CN 211011807U CN 201921705103 U CN201921705103 U CN 201921705103U CN 211011807 U CN211011807 U CN 211011807U
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- Prior art keywords
- compressor
- temperature
- pressure controller
- coil
- evaporator
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- 238000007710 freezing Methods 0.000 title claims abstract description 32
- 230000001012 protector Effects 0.000 claims abstract description 27
- 230000008014 freezing Effects 0.000 claims abstract description 26
- 238000005057 refrigeration Methods 0.000 claims abstract description 21
- 239000007788 liquid Substances 0.000 claims abstract description 20
- 239000000523 sample Substances 0.000 claims abstract description 13
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 21
- 229910052802 copper Inorganic materials 0.000 claims description 21
- 239000010949 copper Substances 0.000 claims description 21
- 239000003507 refrigerant Substances 0.000 claims description 10
- 208000001034 Frostbite Diseases 0.000 claims description 4
- 238000004378 air conditioning Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000029058 respiratory gaseous exchange Effects 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
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- Air Conditioning Control Device (AREA)
Abstract
The utility model discloses an anti-freezing control system of a high-temperature air conditioner, which is used for a refrigeration loop consisting of a compressor, a condenser, a liquid storage device, a filter, an expansion valve and an evaporator, and comprises a freezing point protector, a high-pressure controller and a low-pressure controller, the temperature measuring device comprises an alternating current contactor of a compressor, a time relay and a temperature sensing probe of a freezing point protector, wherein the temperature measuring probe of the freezing point protector measures the temperature of an evaporator coil, a high-voltage pressure controller and a low-voltage pressure controller are respectively installed at an exhaust end and an air return end of the compressor, contacts of the high-voltage pressure controller and the low-voltage pressure controller, a power-on delay closing contact of the time relay and an alternating current contactor coil of the compressor are sequentially connected in series to form a first series branch, two ends of the first series branch are respectively externally connected with a power supply, a coil of the time relay and a contact of the freezing point protector are connected in series to form a second series branch. The utility model discloses make high temperature air conditioner can realize high low temperature all-in-one at low temperature refrigeration operation.
Description
Technical Field
The utility model relates to a high temperature air conditioning system field specifically is a high temperature air conditioner prevents frostbite control system.
Background
The vehicle-mounted and airborne carrying equipment for executing transportation, communication, detection and other tasks, and equipment rooms of industry, power plants, oil drilling platforms and other equipment usually work in high-temperature environments, and need to be matched with a special high-temperature air conditioner suitable for the working environment to control the temperature of the equipment. When the ambient temperature (usually below 18 ℃) is low, the heat of the cooled cabin heating element is large, and air-conditioning refrigeration is still needed to cool the machine room and the cabin. When a conventional high-temperature air conditioner product works at normal temperature, the high-temperature air conditioner can be adjusted through the liquid storage tank, but when the ambient temperature is lower, the evaporator can be frosted and frozen by continuously refrigerating, even the liquid impact damage of the compressor can be caused, and the normal use of the unit is influenced.
Therefore, when the high-temperature air conditioner operates in low-temperature refrigeration, namely the high-temperature air conditioner can reliably work under the low-temperature refrigeration working condition, a reliable refrigeration system must be designed and control measures adapted to the reliable refrigeration system must be adopted.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a high temperature air conditioner prevents frostbite control system to there is the problem of "liquid attack" damage in the compressor when solving prior art high temperature air conditioning system operation.
In order to achieve the above purpose, the utility model discloses the technical scheme who adopts is:
the utility model provides a high temperature air conditioner prevents frostbite control system for the closed cycle refrigeration circuit that constitutes by compressor, condenser, reservoir, filter, expansion valve, evaporimeter which characterized in that: comprises a freezing point protector, a high-pressure controller, a low-pressure controller, an alternating current contactor of a compressor and a time relay, the temperature sensing probe of the freezing point protector is in contact with a coil of the evaporator to measure the temperature of the evaporator coil, the high-pressure controller is installed on a pipeline at the exhaust end of the compressor, the low-pressure controller is installed on a pipeline at the air return end of the compressor, a contact of the high-pressure controller, a contact of the low-pressure controller, a power-on delay closing contact of the time relay and an alternating current contactor coil of the compressor are sequentially connected in series to form a first series branch, the power-on delay closing contact of the time relay and the alternating current contactor coil of the compressor in the first series branch form a compressor control section, two ends of the first series branch are respectively connected with an external power supply, a coil of the time relay and a contact of the freezing point protector are connected in series to form a second series branch, and the second series.
The anti-freezing control system of the high-temperature air conditioner is characterized in that: the closed circulation refrigeration loop is formed by connecting the exhaust end of the compressor with the inlet end of the condenser through a pipeline, communicating the outlet end of the condenser with the interior of the liquid storage device through a pipeline, connecting the interior of the liquid storage device with the inlet end of the filter through a pipeline, connecting the outlet end of the filter with the inlet end of the expansion valve through a pipeline, connecting the outlet end of the expansion valve with the inlet end of the evaporator through a pipeline, and connecting the outlet end of the evaporator with the air return end of the compressor through a pipeline.
The anti-freezing control system of the high-temperature air conditioner is characterized in that: the closed cycle refrigeration loop is circulated with R134a high-temperature environment-friendly refrigerant.
The anti-freezing control system of the high-temperature air conditioner is characterized in that: the coil pipe of the evaporator is provided with a temperature sensing copper sleeve, the pipe wall of the temperature sensing copper sleeve is welded on the pipe wall of the coil pipe of the evaporator, and a temperature sensing probe of the freezing point protector is inserted into the temperature sensing copper sleeve from the pipe orifice of the temperature sensing copper sleeve.
The utility model adopts the way that the liquid storage device is arranged at the outlet of the condenser to improve the applicability of the system; the temperature sensing copper sleeve is welded on the evaporator coil, the temperature sensing probe of the freezing point protector is inserted to sense the temperature of the evaporator coil, and the start and stop of the compressor are controlled through the freezing point protector contact, so that frost (ice) on the evaporator can be dissolved in time, the damage of the compressor caused by liquid impact is prevented, and the compressor is ensured to be restarted for more than 3min interval time through the time delay contact of the time relay.
The utility model has the advantages that:
1. by designing a reliable refrigerating system and adopting control measures suitable for the refrigerating system, the high-temperature air conditioner can run at low temperature for refrigeration, and the high-temperature and low-temperature integrated machine is realized.
2. The method is characterized in that a liquid storage device is arranged at an outlet of a condenser of an air-conditioning refrigeration system; a temperature sensing copper sleeve is welded on an evaporator coil, a temperature sensing probe of an ice point protector is inserted to sense the temperature of the evaporator coil, the start and stop of a compressor are controlled through a contact of the ice point protector, and the contact is closed through the power-on delay of a time relay, so that the compressor is ensured to be started again for more than 3 min. The problem that the normal operation of a unit is influenced because the evaporator is frosted and frozen until the compressor is damaged by liquid impact when the high-temperature air-conditioning refrigeration system continues to refrigerate when the ambient temperature is lower is effectively solved.
3. The utility model discloses simple structure, fault rate are low, safe and reliable, with low costs, consequently, economic nature, practicality are strong.
4. The utility model discloses a refrigerating system's optimization matches and effectual control measure, has improved refrigerating system's adaptability that temperature variation is big and load variation is big.
Drawings
Fig. 1 is a system structure diagram of the present invention.
Fig. 2 is a schematic diagram of the electrical part of the present invention.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
As shown in fig. 1, the freezing prevention control system for the high-temperature air conditioner is used for a closed circulation refrigeration loop consisting of a compressor 1, an evaporator 3 with an evaporation fan 2, an expansion valve 4, a filter 5, an accumulator 6 and a condenser 7 with a condensation fan 9. In the closed circulation refrigeration system, the exhaust end of a compressor 1 is connected with the inlet end of a condenser 7 through a copper pipe, the outlet end of the condenser 7 is communicated with the interior of a liquid storage device 6 through a copper pipe, the interior of the liquid storage device 6 is also connected with the inlet end of a filter 5 through a copper pipe, the outlet end of the filter 5 is connected with the inlet end of an expansion valve 4 through a copper pipe, the outlet end of the expansion valve 4 is connected with the inlet end of an evaporator 3 through a copper pipe, the outlet end of the evaporator 3 is connected with the air return end of the compressor 1 through a copper pipe, a closed circulation refrigeration loop is formed, and R134.
The utility model discloses control system includes compressor 1's alternating current contactor KM 12, time relay KT 13, freezing point protector ST8, high-pressure controller 11, low pressure controller 10. A temperature sensing copper sleeve is welded on the coil pipe of the evaporator 3, and a temperature sensing probe of a freezing point protector ST8 is inserted into the temperature sensing copper sleeve; the low pressure controller 10 is inserted in the copper pipe at the return end of the compressor 1, and the high pressure controller 11 is inserted in the copper pipe at the exhaust end of the compressor 1 and welded into the system by a brazing bar with 15% silver content.
A contact 11-1 of a high-pressure controller 11, a contact 10-1 of a low-pressure controller 10, a power-on delay closing contact KT-1 of a time relay KT 13 and a coil KM-1 of an alternating current contactor KM 12 of a compressor 1 are sequentially connected in series to form a first series branch, two ends of the first series branch are respectively and externally connected with a live wire L and a zero wire N of a power supply, a contact ST-1 of a freezing point protector ST8 and a coil KT-2 of the time relay KT 13 are connected in series to form a second series branch, and the second series branch is connected in parallel to a series part of the power-on delay closing contact KT-1 of the time relay KT 13 and the coil KM-1 of the alternating current contactor KM.
The utility model discloses reservoir 6 of export installation of condenser 7, when heat load reduces or ambient temperature is lower, the refrigerant can not evaporate completely in evaporimeter 3, it is unnecessary to cause the air conditioner refrigerating system refrigerant when low temperature, just so can have refrigerant liquid and refrigerant gas mixture to get into compressor 1, so will install a reservoir 6 before advancing evaporimeter 3, store liquid refrigerant, prevent that liquid refrigerant from getting into compressor 1's the chamber of breathing in, puncture the valve block of breathing in, promptly "liquid hits", and cause compressor 1 to damage. Therefore, the liquid storage device 6 is additionally arranged in the refrigerating system, so that certain refrigerant can be stored when the refrigerating working condition is changed violently, and the system pressure is stabilized. Thus, the provision of the accumulator 6 may improve the flexibility of the refrigeration system for systems with wide temperature variations and load variations.
A temperature sensing copper sleeve is welded on a coil of the evaporator 3, a temperature sensing probe of the freezing point protector ST8 is inserted to sense the temperature of the evaporator coil, a proper action temperature value (set to be-2 ℃, the contact is disconnected, the return difference is 8 ℃ and the contact is closed.) is set for the freezing point protector, the start and stop of the compressor 1 are controlled through the contact ST-1 of the freezing point protector ST8, the contact KT-1 is closed through the power-on delay of the time relay KT 13, the alternating current contactor KM 12 of the compressor 1 is controlled, and the compressor 1 is ensured to be started again for more than 3 min. When the temperature sensing probe of the freezing point protector ST8 senses the temperature of the coil of the evaporator at minus 2 ℃, the contact ST-1 of the freezing point protector ST8 is disconnected, the coil KT-2 of the time relay KT 13 loses power, the time relay KT 13 is electrified to delay the closing contact KT-1 to be disconnected instantly, the coil KM-1 of the alternating current contactor KM 12 of the compressor 1 loses power, the compressor 1 stops working, and frost (ice) on the coil of the evaporator 3 and on the fins is gradually dissolved. When the temperature of the coil pipe of the evaporator 3 is sensed to reach 6 ℃ by the temperature sensing probe of the freezing point protector ST8, the contact ST-1 of the freezing point protector ST8 is closed, the coil KM-1 of the time relay KT 13 is electrified, the electrified delay closing contact KT-1 of the time relay KT 13 is closed in a delay mode for 3min, the coil KM-1 of the alternating current contactor KM 12 of the compressor 1 is electrified, the compressor 1 is started, and the refrigerating system operates normally. Therefore, the temperature sensing probe of the freezing point protector ST8 senses the temperature of the evaporator coil to control the starting and stopping of the compressor 1, so that the normal defrosting of the system is ensured, and the damage to the compressor caused by liquid impact is avoided.
When the air conditioner works in a low-temperature environment, the pressure of the system can be reduced, or the refrigerant of the system leaks to damage the compressor 1, in order to prevent the pressure of the refrigeration system from being too low, the low-pressure controller 10 is arranged, and when the pressure of the system is lower than the set value of the low-pressure controller 10, the compressor 1 is stopped.
When the air conditioner works in a high-temperature severe environment, the pressure of the system can rise, in order to prevent the compressor 1 from being damaged due to overhigh pressure of the refrigerating system, the high-pressure controller 11 is arranged, and when the pressure of the system exceeds the set value of the high-pressure controller 11, the compressor 1 is stopped.
The above embodiments are not limited to the protection scope of the present invention, and all modifications or changes based on the basic idea of the present invention belong to the protection scope of the present invention.
The embodiments of the present invention are only descriptions of the preferred embodiments of the present invention, not right the present invention is designed and limited, without departing from the design concept of the present invention, the technical personnel in the field should fall into the protection scope of the present invention for various modifications and improvements made by the technical solution of the present invention, and the technical contents of the present invention are all recorded in the claims.
Claims (4)
1. The utility model provides a high temperature air conditioner prevents frostbite control system for the closed cycle refrigeration circuit that constitutes by compressor, condenser, reservoir, filter, expansion valve, evaporimeter which characterized in that: comprises a freezing point protector, a high-pressure controller, a low-pressure controller, an alternating current contactor of a compressor and a time relay, the temperature sensing probe of the freezing point protector is in contact with a coil of the evaporator to measure the temperature of the evaporator coil, the high-pressure controller is installed on a pipeline at the exhaust end of the compressor, the low-pressure controller is installed on a pipeline at the air return end of the compressor, a contact of the high-pressure controller, a contact of the low-pressure controller, a power-on delay closing contact of the time relay and an alternating current contactor coil of the compressor are sequentially connected in series to form a first series branch, the power-on delay closing contact of the time relay and the alternating current contactor coil of the compressor in the first series branch form a compressor control section, two ends of the first series branch are respectively connected with an external power supply, a coil of the time relay and a contact of the freezing point protector are connected in series to form a second series branch, and the second series.
2. The system of claim 1, wherein the control system comprises: the closed circulation refrigeration loop is formed by connecting the exhaust end of the compressor with the inlet end of the condenser through a pipeline, communicating the outlet end of the condenser with the interior of the liquid storage device through a pipeline, connecting the interior of the liquid storage device with the inlet end of the filter through a pipeline, connecting the outlet end of the filter with the inlet end of the expansion valve through a pipeline, connecting the outlet end of the expansion valve with the inlet end of the evaporator through a pipeline, and connecting the outlet end of the evaporator with the air return end of the compressor through a pipeline.
3. The system of claim 1, wherein the control system comprises: the closed cycle refrigeration loop is circulated with R134a high-temperature environment-friendly refrigerant.
4. The system of claim 1, wherein the control system comprises: the coil pipe of the evaporator is provided with a temperature sensing copper sleeve, the pipe wall of the temperature sensing copper sleeve is welded on the pipe wall of the coil pipe of the evaporator, and a temperature sensing probe of the freezing point protector is inserted into the temperature sensing copper sleeve from the pipe orifice of the temperature sensing copper sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921705103.2U CN211011807U (en) | 2019-10-12 | 2019-10-12 | Anti-freezing control system of high-temperature air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921705103.2U CN211011807U (en) | 2019-10-12 | 2019-10-12 | Anti-freezing control system of high-temperature air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211011807U true CN211011807U (en) | 2020-07-14 |
Family
ID=71468929
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921705103.2U Expired - Fee Related CN211011807U (en) | 2019-10-12 | 2019-10-12 | Anti-freezing control system of high-temperature air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211011807U (en) |
-
2019
- 2019-10-12 CN CN201921705103.2U patent/CN211011807U/en not_active Expired - Fee Related
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200714 |
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| CF01 | Termination of patent right due to non-payment of annual fee |