CN110553437A - Hot defrosting direct current frequency conversion compression condensing unit - Google Patents
Hot defrosting direct current frequency conversion compression condensing unit Download PDFInfo
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- CN110553437A CN110553437A CN201910821300.9A CN201910821300A CN110553437A CN 110553437 A CN110553437 A CN 110553437A CN 201910821300 A CN201910821300 A CN 201910821300A CN 110553437 A CN110553437 A CN 110553437A
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- Prior art keywords
- direct
- way reversing
- reversing valve
- frequency
- condensing unit
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Classifications
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- 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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
- F25B47/022—Defrosting cycles hot gas defrosting
- F25B47/025—Defrosting cycles hot gas defrosting by reversing the cycle
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- 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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a hot defrosting direct current variable frequency compression condensing unit, which comprises: the direct-current frequency conversion compressor is communicated with the oil separator, the oil separator is communicated with the four-way reversing valve, the four-way reversing valve is respectively communicated with the heat exchanger, the direct-current frequency conversion compressor and the stop valve, the heat exchanger is communicated with the liquid storage device, the liquid storage device is communicated with the filter, the filter is communicated with the liquid viewing mirror, and the filter is communicated with the stop valve. Under the condition of load change, the operation parameters of each stage in the refrigeration system are collected, the operation frequency of the direct-current variable-frequency compressor is flexibly adjusted, and the four-way reversing valve performs reversing defrosting when the system is frosted, so that the rapid cooling and defrosting are realized, and the temperature fluctuation is reduced.
Description
Technical Field
The invention relates to a direct-current variable-frequency compression condensing unit for thermal defrosting, and belongs to the technical field of refrigeration engineering.
Background
The refrigeration engineering mainly relates to a wide range, and the refrigerator is a research field, and the refrigerator is mechanical equipment for achieving low-temperature refrigeration by changing pressure change of refrigerant gas through a compressor. The compressor used is different from the common air compressor due to the different use conditions and the different compressed working media. According to the difference of the structure and the working principle of the refrigerator, the refrigerator is similar to an air compressor and can be divided into a piston type, a screw type, a centrifugal type and other different forms. Freezers are one of the most important components of compression refrigeration equipment. The refrigerating machine is composed of compressor, condenser, evaporator, drying filter and expansion throttle valve which are connected in series, and the proper quantity of refrigerant is filled in the refrigerating machine, and the compressor is controlled by electric appliance according to the requirement of environment so as to attain the goal of refrigeration and heat transfer. In general, there are two types of refrigerators, water-cooled and air-cooled. The water-cooled refrigeration device has better water-cooled refrigeration effect, needs cooling water, is flexible and convenient in air-cooled mode, does not need cooling water, and is suitable for water-deficient areas or occasions needing to be moved. The working medium of the refrigerator is the refrigerant which is used for transferring heat in the refrigerating system, and the common refrigerants are as follows: freon, ammonia, lithium bromide, chloromethane and the like, wherein the Freon has a plurality of types such as fluorine 11(R-11), fluorine 12(R-12), fluorine 13(R-13), fluorine 21(R-21), fluorine 22(R-22), fluorine 113(R-113), fluorine 114(R-114), fluorine 142(R-142) and the like according to the gasification temperature and the chemical molecular formula. The refrigerant can be respectively used in low-pressure (the condensation pressure is less than 0.3-0.3MPa), high-temperature (the evaporation temperature is more than 0 ℃), medium-pressure (the condensation pressure is 1-2MPa), medium-temperature (the evaporation temperature is 0-50 ℃) and high-pressure (the condensation pressure is more than 2MPa) low-temperature (the evaporation temperature is less than-50 ℃) refrigeration systems.
The conventional refrigeration system has the following defects: (1) the traditional alternating-current compressor is used, so that the refrigeration efficiency is low; (2) the electric heating tube is used for defrosting, the defrosting efficiency is low, the speed is low, and the temperature fluctuation of the refrigeration house is large. For this reason, a corresponding technical scheme needs to be designed for solution.
Disclosure of Invention
the invention aims to provide a hot defrosting direct-current variable-frequency compression condensing unit which is energy-saving and environment-friendly, and can flexibly adjust the operating frequency of a direct-current variable-frequency compressor by acquiring the operating parameters of each stage in a refrigeration system under the condition of load change, realize the reversing defrosting of a four-way reversing valve when the system is frosted, realize the quick cooling and defrosting, and reduce the temperature fluctuation.
In order to solve the problems, the technical scheme adopted by the invention is as follows:
The utility model provides a hot defrosting direct current frequency conversion compression condensing unit, mainly includes: the direct-current frequency conversion compressor is communicated with the oil separator, the oil separator is communicated with the four-way reversing valve, the four-way reversing valve is respectively communicated with the heat exchanger, the direct-current frequency conversion compressor and the stop valve, the heat exchanger is communicated with the liquid storage device, the liquid storage device is communicated with the filter, the filter is communicated with the liquid viewing mirror, and the filter is communicated with the stop valve.
As an improvement of the technical scheme, a first pressure sensor and a first temperature sensor are mounted on a connecting pipe of the oil separator and the four-way reversing valve, a second pressure sensor and a second temperature sensor are mounted on a connecting pipe of the four-way reversing valve and the direct-current variable-frequency compressor, and a third temperature sensor is mounted on a connecting pipe of the heat exchanger and the liquid reservoir.
As an improvement of the above technical solution, the hot defrosting direct current frequency conversion compression condensing unit further comprises a controller used in cooperation, wherein the first pressure sensor, the first temperature sensor, the second pressure sensor, the second temperature sensor, the four-way reversing valve and the third temperature sensor are all connected to the controller through wires.
As an improvement of the above technical solution, the controller converts voltage or current signals of the first pressure sensor, the first temperature sensor, the second pressure sensor, the second temperature sensor and the third temperature sensor into temperature and pressure data.
As an improvement of the technical scheme, the controller outputs signals for controlling the direct-current variable-frequency compressor and the four-way reversing valve through signals of temperature and pressure and through software setting and calculation.
Compared with the prior art, the invention has the following implementation effects:
The invention uses the direct current frequency conversion compressor to match with the four-way reversing valve, so that the system is more stable and reliable in operation, and the system is higher in efficiency during refrigeration by combining with the intelligent controller.
The invention mainly solves the defects existing in the traditional refrigerating device and has the following advantages:
(1) When the refrigeration system is in operation, the temperature can reach the set temperature quickly according to the frequency conversion of the load through the direct-current frequency conversion compressor and the controller, when the system frosts, the controller sends out an instruction, the four-way reversing valve enables the system to defrost quickly through reversing, the temperature change in the refrigeration house is less, and the energy consumption is lower than that of a traditional unit.
(2) Compared with the conventional fixed-frequency compressor, the direct-current variable-frequency compressor is used, the refrigeration efficiency of the compressor is higher, the running variable frequency can be changed through the signal of the controller, the temperature can reach the set value more quickly, and the temperature fluctuation is smaller.
(3) compared with the conventional condensing unit, the invention uses the four-way reversing valve, the controller judges whether the system is frosted, the running direction of the refrigerant of the system is reversed through the action of the four-way reversing valve, and the system supplies heat to the evaporator, thereby achieving the effect of quick defrosting.
(4) The invention collects the signals of various sensors in the controller, and the controller controls the direct current variable frequency compressor and the four-way reversing valve through preset software, thereby realizing automatic and efficient system operation.
Drawings
FIG. 1 is a schematic diagram of a system framework of a thermal defrosting direct-current variable-frequency compression condensing unit according to the invention;
fig. 2 is a schematic diagram of a controller PCB according to the present invention.
Detailed Description
The present invention will be described with reference to specific examples.
Example (b): as shown in fig. 1 and 2: hot defrosting direct current frequency conversion compression condensing unit includes: the device comprises a direct-current variable-frequency compressor 1, a four-way reversing valve 2, a heat exchanger 3, an oil separator 4, a liquid storage device 5, a filter 6, a liquid viewing mirror 7 and stop valves 8, wherein the direct-current variable-frequency compressor 1 is communicated with the oil separator 4, the oil separator 4 is communicated with the four-way reversing valve 2, the four-way reversing valve 2 is respectively communicated with the heat exchanger 3, the direct-current variable-frequency compressor 1 and the stop valves 8, the heat exchanger 3 is communicated with the liquid storage device 5, the liquid storage device 5 is communicated with the filter 6, and the filter 6 is respectively communicated with the liquid viewing; a first pressure sensor 9 and a first temperature sensor 10 are respectively arranged on connecting pipes of the oil separator 4 and the four-way reversing valve 2, a second pressure sensor 11 and a second temperature sensor 13 are respectively arranged on connecting pipes of the four-way reversing valve 2 and the direct-current variable-frequency compressor 1, and a third temperature sensor 12 is arranged on a connecting pipe of the heat exchanger 3 and the liquid reservoir 5; the hot defrosting direct-current variable-frequency compression condensing unit further comprises a controller 14 which is used in a matched mode, and a first pressure sensor 9, a first temperature sensor 10, a second pressure sensor 11, a second temperature sensor 13, a third temperature sensor 12 and the four-way reversing valve 2 of the hot defrosting direct-current variable-frequency compression condensing unit are connected to the controller 14 through leads; the controller 14 converts voltage or current signals of the first pressure sensor 9, the first temperature sensor 10, the second pressure sensor 11, the second temperature sensor 13, and the third temperature sensor 12 into temperature and pressure data. The direct-current variable-frequency compressor 1 is matched with the four-way reversing valve 2, so that the system is more stable and reliable in operation, and the system is higher in efficiency during refrigeration by combining the intelligent controller; under the condition of load change, the operation parameters of each stage in the refrigeration system are collected, the operation frequency of the direct-current variable-frequency compressor is flexibly adjusted, and the four-way reversing valve 2 performs reversing defrosting when the system is frosted, so that the rapid cooling and defrosting are realized, and the temperature fluctuation is reduced. The method specifically comprises the following steps: when the refrigeration system runs, the set temperature can be quickly reached according to the frequency conversion of the load through the direct-current frequency conversion compressor 1 and the controller 14, when the system is frosted, the controller sends out an instruction, and the four-way reversing valve 2 is reversed, so that the system can be quickly defrosted, the temperature change in a cold storage is less, and the energy consumption is lower than that of a traditional unit; compared with the conventional fixed-frequency compressor, the direct-current variable-frequency compressor 1 is used, the refrigeration efficiency of the compressor is higher, the running variable frequency can be changed through the signal of the controller 14, the temperature can reach a set value more quickly, and the temperature fluctuation is smaller; compared with the conventional condensing unit, the invention uses the four-way reversing valve 2, the controller 14 judges whether the system is frosted, the running direction of the refrigerant of the system is reversed through the action of the four-way reversing valve 2, and the system supplies heat to the evaporator, thereby achieving the effect of quick defrosting. The invention collects the signals of various sensors in the controller 14, and the controller 14 controls the direct current variable frequency compressor 1 and the four-way reversing valve 2 through preset software, thereby realizing automatic and efficient system operation.
Specifically, the controller 14 outputs signals for controlling the direct-current variable-frequency compressor 1 and the four-way reversing valve 2 through signals of temperature and pressure and through software setting and calculation.
the foregoing is a detailed description of the invention with reference to specific embodiments, and the practice of the invention is not to be construed as limited thereto. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (5)
1. The utility model provides a hot defrosting direct current frequency conversion compression condensing unit which characterized in that: the method mainly comprises the following steps: direct current inverter compressor (1), four-way reversing valve (2), heat exchanger (3), oil separator (4), reservoir (5), filter (6), look liquid mirror (7), stop valve (8), direct current inverter compressor (1) with oil separator (4) intercommunication, oil separator (4) with four-way reversing valve (2) intercommunication, four-way reversing valve (2) respectively with heat exchanger (3), direct current inverter compressor (1), stop valve (8) intercommunication, heat exchanger (3) with reservoir (5) intercommunication, reservoir (5) with filter (6) intercommunication, filter (6) respectively with look liquid mirror (7) and two stop valve (8) intercommunication.
2. The hot defrosting direct-current variable-frequency compression condensing unit according to claim 1, characterized in that: the oil separator is characterized in that a first pressure sensor (9) and a first temperature sensor (10) are respectively arranged on connecting pipes of the oil separator (4) and the four-way reversing valve (2), a second pressure sensor (11) and a second temperature sensor (13) are respectively arranged on connecting pipes of the four-way reversing valve (2) and the direct-current variable-frequency compressor (1), and a third temperature sensor (12) is arranged on connecting pipes of the heat exchanger (3) and the liquid reservoir (5).
3. The hot defrosting direct-current variable-frequency compression condensing unit according to claim 2, characterized in that: the hot defrosting direct-current variable-frequency compression condensing unit further comprises a controller (14) which is matched with the hot defrosting direct-current variable-frequency compression condensing unit, wherein the first pressure sensor (9), the first temperature sensor (10), the second pressure sensor (11), the second temperature sensor (13), the third temperature sensor (12) and the four-way reversing valve (2) are connected to the controller (14) through leads.
4. The hot defrosting direct current frequency conversion compression condensing unit according to claim 3, characterized in that: the controller (14) converts voltage or current signals of the first pressure sensor (9), the first temperature sensor (10), the second pressure sensor (11), the second temperature sensor (13) and the third temperature sensor (12) into temperature and pressure data.
5. The hot defrosting direct current frequency conversion compression condensing unit according to claim 4, characterized in that: the controller (14) outputs signals for controlling the direct-current variable-frequency compressor (1) and the four-way reversing valve (2) through signals of temperature and pressure and through software setting and calculation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910821300.9A CN110553437A (en) | 2019-09-02 | 2019-09-02 | Hot defrosting direct current frequency conversion compression condensing unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910821300.9A CN110553437A (en) | 2019-09-02 | 2019-09-02 | Hot defrosting direct current frequency conversion compression condensing unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110553437A true CN110553437A (en) | 2019-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910821300.9A Pending CN110553437A (en) | 2019-09-02 | 2019-09-02 | Hot defrosting direct current frequency conversion compression condensing unit |
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| CN (1) | CN110553437A (en) |
Citations (10)
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|---|---|---|---|---|
| JPH0237265A (en) * | 1988-07-28 | 1990-02-07 | Matsushita Electric Ind Co Ltd | Heat pump type air conditioner |
| CN1467462A (en) * | 2002-07-03 | 2004-01-14 | Lg电子株式会社 | Defrosting apparatus of air conditioner and method thereof |
| CN201014831Y (en) * | 2006-12-30 | 2008-01-30 | 青岛海信空调有限公司 | DC inverter air-conditioner |
| CN101198831A (en) * | 2005-06-15 | 2008-06-11 | 大金工业株式会社 | Refrigerating unit |
| CN101430154A (en) * | 2008-11-11 | 2009-05-13 | 深圳市协诚机电设备工程有限公司 | Inverse defrosting method for air supply heat pump |
| CN103542459A (en) * | 2013-11-08 | 2014-01-29 | 海信（山东）空调有限公司 | Cooling and heating inverter air conditioner and defrosting method during heating operation |
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| CN203785152U (en) * | 2014-04-20 | 2014-08-20 | 倪仁建 | Evaporation and condensation type heating and cooling air conditioner |
| CN105371391A (en) * | 2014-08-20 | 2016-03-02 | 青岛海信日立空调系统有限公司 | Outdoor unit for air conditioner and air conditioner |
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-
2019
- 2019-09-02 CN CN201910821300.9A patent/CN110553437A/en active Pending
Patent Citations (10)
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|---|---|---|---|---|
| JPH0237265A (en) * | 1988-07-28 | 1990-02-07 | Matsushita Electric Ind Co Ltd | Heat pump type air conditioner |
| CN1467462A (en) * | 2002-07-03 | 2004-01-14 | Lg电子株式会社 | Defrosting apparatus of air conditioner and method thereof |
| CN101198831A (en) * | 2005-06-15 | 2008-06-11 | 大金工业株式会社 | Refrigerating unit |
| CN201014831Y (en) * | 2006-12-30 | 2008-01-30 | 青岛海信空调有限公司 | DC inverter air-conditioner |
| CN101430154A (en) * | 2008-11-11 | 2009-05-13 | 深圳市协诚机电设备工程有限公司 | Inverse defrosting method for air supply heat pump |
| CN203432136U (en) * | 2013-08-20 | 2014-02-12 | 海信（山东）空调有限公司 | Jet enthalpy increasing air conditioning system |
| CN103542459A (en) * | 2013-11-08 | 2014-01-29 | 海信（山东）空调有限公司 | Cooling and heating inverter air conditioner and defrosting method during heating operation |
| CN203785152U (en) * | 2014-04-20 | 2014-08-20 | 倪仁建 | Evaporation and condensation type heating and cooling air conditioner |
| CN105371391A (en) * | 2014-08-20 | 2016-03-02 | 青岛海信日立空调系统有限公司 | Outdoor unit for air conditioner and air conditioner |
| CN108019971A (en) * | 2016-11-03 | 2018-05-11 | 威海桦众节能设备有限公司 | A kind of ultra-low-loop temperature air source heat pump with backheat |
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Application publication date: 20191210 |
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| WD01 | Invention patent application deemed withdrawn after publication |