CN215175652U - Full fresh air direct expansion type air conditioning system - Google Patents
Full fresh air direct expansion type air conditioning system Download PDFInfo
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- CN215175652U CN215175652U CN202121538864.0U CN202121538864U CN215175652U CN 215175652 U CN215175652 U CN 215175652U CN 202121538864 U CN202121538864 U CN 202121538864U CN 215175652 U CN215175652 U CN 215175652U
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Abstract
The utility model discloses a full fresh air formula air conditioning system that directly expands, which comprises a compressor, the oil separator, exhaust solenoid, the cross-over reversing valve, vapour and liquid separator, reserve solenoid, outdoor heat exchanger, indoor heat exchanger etc, a compressor, the oil separator, the check valve connects gradually, and this check valve is connected with exhaust solenoid and steam bypass solenoid respectively, exhaust solenoid, outdoor heat exchanger, indoor heat exchanger and vapour and liquid separator all are connected with the cross-over reversing valve, indoor heat exchanger passes through the condensing pressure governing valve and is connected with the reservoir, the reservoir is connected with electronic expansion valve, electronic expansion valve is connected with outdoor heat exchanger and indoor heat exchanger respectively, outdoor heat exchanger is connected with the reservoir, the steam bypass solenoid passes through the steam bypass valve and is connected with outdoor heat exchanger, outdoor heat exchanger is connected with vapour and liquid separator through reserve solenoid. The utility model discloses when changing the frost, do not follow indoor absorbed heat, change the frost through steam bypass mode, indoor fan need not shut down, has certain security.
Description
Technical Field
The utility model relates to an air conditioning system, concretely relates to full fresh air directly expands formula air conditioning system.
Background
In the application occasions of the constant temperature and the constant humidity of the whole fresh air, the scheme of an air-cooled heat pump cold (hot) water unit (air-cooled heat pump for short) and a whole fresh air processing unit is adopted in the traditional mode, the refrigeration operation in summer is used for dehumidification and reheating, and the heating operation in winter is used for heating and humidification. The air-cooled heat pump heats in winter to provide hot water to a full fresh air treatment unit (called a treatment unit for short), but when the environmental temperature is low in winter, the air-cooled heat pump needs to defrost to influence the quality of the hot water, and a proper energy storage water tank and a compensation electric heating device used in defrosting on a water pipe are arranged on a water system to ensure the constant temperature of the hot water during defrosting.
Although the traditional mode can realize constant temperature and humidity of all fresh air, the engineering construction needs to have proper energy storage water tank and compensation electric heating. The engineering does not have the perfect heating and ventilation design, the applied faults are frequent, the constant temperature and humidity effect can not be achieved, and even the equipment is damaged. In addition, fresh air with the temperature lower than 0 ℃ is introduced into the processing unit in winter, so that the surface cooler of the processing unit is easy to freeze and is damaged. The air-cooled heat pump has an advanced four-pipe heating recovery technology, so that the heat recovery of a condenser in refrigeration operation in summer is ensured to obtain a constant reheating heat source, and a set of water pipelines is additionally arranged in engineering. A large-scale heat recovery water system of four-pipe equipment also needs to be provided with an energy storage water tank.
It is very necessary to research a novel fresh air implementation scheme, avoid the hidden danger of icing, simplify the strength of engineering construction and shorten the construction period. The full fresh air constant-temperature and constant-humidity direct expansion type system technology can guarantee that when the direct expansion type system operates in a heating mode in winter, frost can be melted when the environment temperature is low in winter, the direct expansion type system needs to stop an indoor fan of a processing unit, the situation is not allowed in a constant-temperature and constant-humidity situation, and cold air can be blown without stopping the indoor fan.
Disclosure of Invention
The utility model aims to solve the technical problem that not enough to above-mentioned prior art provides a full fresh air directly expands formula air conditioning system, does not follow indoor heat absorption when this full fresh air directly expands formula air conditioning system changes frost, changes the frost through the mode of steam bypass, and indoor fan need not shut down when changing the frost, still has the security that the steam bypass changes the frost.
In order to realize the technical purpose, the utility model discloses the technical scheme who takes does:
a full fresh air direct expansion type air conditioning system comprises a compressor, an oil separator, an exhaust solenoid valve, a four-way reversing valve, a gas-liquid separator, a standby solenoid valve, an outdoor heat exchanger, an indoor heat exchanger, an electronic expansion valve, a liquid storage device, a hot gas bypass solenoid valve, a hot gas bypass valve, a condensation pressure regulating valve and a plurality of one-way valves, wherein an outlet of the compressor is connected with the oil separator, the oil separator is respectively connected with the exhaust solenoid valve and the hot gas bypass solenoid valve through the one-way valves, the exhaust solenoid valve, the outdoor heat exchanger, the indoor heat exchanger and the gas-liquid separator are respectively connected with four ports of the four-way reversing valve, the indoor heat exchanger is connected with the liquid storage device sequentially through the one-way valves and the condensation pressure regulating valve, the liquid storage device is connected with the electronic expansion valve, the electronic expansion valve is connected with the outdoor heat exchanger through the one-way valves, and the electronic expansion valve is connected with the indoor heat exchanger through the one-way valves, the outdoor heat exchanger is connected with the liquid storage device through the one-way valve, the hot gas bypass electromagnetic valve is connected with the outdoor heat exchanger through the hot gas bypass valve, the outdoor heat exchanger is connected with the gas-liquid separator through the standby electromagnetic valve, and the gas-liquid separator is connected with the compressor.
As a further improved technical scheme of the utility model, the oil separator still is connected with the condensing pressure governing valve through the check valve.
As the technical proposal of the further improvement of the utility model, the number of the check valves is 5.
As the utility model discloses further modified technical scheme still includes the hand valve, the one end and the outdoor heat exchanger of hand valve are connected, and the other end is connected with steam bypass solenoid valve.
As the utility model discloses further modified technical scheme, the compressor is direct current variable frequency compressor.
As the utility model discloses further modified technical scheme still includes the controller, the controller is used for controlling exhaust solenoid valve, reserve solenoid valve, electronic expansion valve and the switching of steam bypass solenoid valve.
The utility model has the advantages that:
(1) the utility model discloses air conditioning system adopts the mode defrosting of steam bypass, need not to design energy storage water tank and compensation electrical heating, can realize the effect of constant temperature and humidity, when having avoidd freezing hidden danger, has also simplified the intensity of engineering construction and has subtracted the cycle of short construction.
(2) The utility model discloses air conditioning system adopts the mode of steam bypass to change the frost when changing the frost, need not to stop indoor fan, and does not follow indoor absorption heat, and indoor fan can not blow cold wind.
(3) The utility model discloses a safety that steam bypass changes frost has designed standby solenoid valve, and when compressor exhaust superheat degree when waiting to change frost was less than the safe value, standby solenoid valve opened, made vapour and liquid separator as the stock solution function, changed the frost operation and became refrigerant gaseous state circulation, and unnecessary refrigerant liquid in the outdoor heat exchanger exists vapour and liquid separator the inside through standby solenoid valve in preparation, when waiting for the frost to end, standby solenoid valve just closed and resumes normally, has guaranteed the security that steam bypass changes frost.
Drawings
Fig. 1 is a schematic connection diagram of a full fresh air direct expansion type air conditioning system provided by the present invention.
Detailed Description
The following further description of embodiments of the invention is made with reference to the accompanying drawings:
as shown in fig. 1, a full fresh air direct expansion type air conditioning system comprises a compressor 1, an oil separator 2, an exhaust solenoid valve 3, a four-way reversing valve 4, a gas-liquid separator 14, a standby solenoid valve 12, an outdoor heat exchanger 9, an indoor heat exchanger 5, an electronic expansion valve 8, a liquid reservoir 7, a hot gas bypass solenoid valve 10, a hot gas bypass valve 11, a condensing pressure regulating valve 6 and a plurality of check valves 15, wherein an outlet of the compressor 1 is connected with the oil separator 2, the oil separator 2 is respectively connected with the exhaust solenoid valve 3, the hot gas bypass solenoid valve 10 and the condensing pressure regulating valve 6 through the check valves 15, the exhaust solenoid valve 3, the outdoor heat exchanger 9, the indoor heat exchanger 5 and the gas-liquid separator 14 are respectively connected with four ports of the four-way reversing valve 4, the indoor heat exchanger 5 is connected with the liquid reservoir 7 through the check valves 15 and the condensing pressure regulating valve 6 in sequence, reservoir 7 is connected with electronic expansion valve 8, electronic expansion valve 8 is connected with outdoor heat exchanger 9 through check valve 15, and electronic expansion valve 8 still is connected with indoor heat exchanger 5 through check valve 15, outdoor heat exchanger 9 is connected with reservoir 7 through check valve 15, hot gas bypass solenoid valve 10 is connected with outdoor heat exchanger 9 through hot gas bypass valve 11, outdoor heat exchanger 9 is connected with vapour and liquid separator 14 through reserve solenoid valve 12, vapour and liquid separator 14 is connected with compressor 1.
In this embodiment, there are 5 check valves 15.
The present embodiment further comprises a hand valve 13, wherein one end of the hand valve 13 is connected to the outdoor heat exchanger 9, and the other end is connected to the hot gas bypass solenoid valve 10. The hand valve 13, namely the manual regulating valve is a process valve, when the system needs to be vacuumized, the hand valve 13 is opened, the system pipeline is ensured to be completely unblocked, and the vacuumizing is facilitated. In the other states, the hand valve 13 is closed.
In this embodiment, the compressor 1 is a dc inverter compressor.
The present embodiment further includes a controller for controlling the opening and closing of the exhaust solenoid valve 3, the standby solenoid valve 12, the electronic expansion valve 8, and the hot gas bypass solenoid valve 10, and a power supply. The power supply supplies power to the controller.
The air conditioning system can complete the functions of refrigeration, heating, defrosting and the like by controlling each electromagnetic valve and the electronic expansion valve 8 through the controller.
During refrigeration, high-temperature and high-pressure gas discharged by a compressor 1 passes through an oil separator 2, the oil separator 2 separates lubricating oil in the high-temperature and high-pressure gas discharged by the compressor 1, the high-temperature and high-pressure gas sequentially passes through a one-way valve 15 and an exhaust electromagnetic valve 3 and enters a four-way reversing valve 4, the four-way reversing valve 4 is switched to a corresponding conduction position, so that the high-temperature and high-pressure gas enters an outdoor heat exchanger 9, the high-temperature and high-pressure gas is condensed into medium-temperature and high-pressure liquid by the outdoor heat exchanger 9 and then enters an electronic expansion valve 8 through the one-way valve 15 and a liquid reservoir 7, the liquid is throttled into low-temperature and low-pressure liquid by the electronic expansion valve 8 and then enters an indoor heat exchanger 5 through the one-way valve 15, the low-temperature and low-pressure gas is evaporated in the indoor heat exchanger 5 and then enters a gas-liquid separator 14 through the four-way reversing valve 4 and finally returns to the compressor 1, and a finished refrigeration cycle is completed.
When heating, the high-temperature and high-pressure gas discharged by the compressor 1 passes through the oil separator 2, the oil separator 2 separates the lubricating oil in the high-temperature and high-pressure gas discharged by the compressor 1, the high-temperature and high-pressure gas sequentially passes through the check valve 15 and the exhaust electromagnetic valve 3 to enter the four-way reversing valve 4, the four-way reversing valve 4 is switched to a corresponding conducting position, high-temperature and high-pressure gas enters the indoor heat exchanger 5, the high-temperature and high-pressure gas is condensed into medium-temperature and high-pressure liquid by the indoor heat exchanger 5, then enters the electronic expansion valve 8 through the one-way valve 15, the condensation pressure regulating valve 6 and the liquid reservoir 7, is throttled into low-temperature and low-pressure liquid by the electronic expansion valve 8, then enters the outdoor heat exchanger 9 through the one-way valve 15, after being evaporated into low-temperature and low-pressure gas in the outdoor heat exchanger 9, the low-temperature and low-pressure gas enters the gas-liquid separator 14 through the four-way reversing valve 4 and finally returns to the compressor 1, so that a finished heating cycle is completed.
The refrigeration operation is latent heat of dehumidification, and the heating operation is sensible heat exchange, and especially the proportion of the latent heat of refrigeration and the sensible heat of heating of the fresh air system is more obvious, namely the fresh air system needs more cold in summer than heat in winter. The direct expansion fluorine system can be designed into a plurality of independent fluorine systems during defrosting, and when a certain system is defrosted, the standby system operates to compensate heat. However, the defrosting system cannot absorb heat from the indoor space, the indoor fan cannot be stopped, and in order to prevent the defrosting system from absorbing heat from the indoor space, the defrosting system adopts a hot gas bypass mode, and the details are shown in fig. 1.
During defrosting, the standby system operates to replace a defrosting system to provide heat, and the constant air volume, the constant temperature and the constant humidity are ensured. The high-temperature high-pressure gas discharged by the compressor 1 passes through the oil separator 2, the lubricating oil in the high-temperature high-pressure gas discharged by the compressor 1 is separated by the oil separator 2, the high-temperature high-pressure gas sequentially passes through the check valve 15 and enters the hot gas bypass electromagnetic valve 10, the hot gas bypass electromagnetic valve 10 is conducted, and the high-temperature high-pressure gas enters the outdoor heat exchanger 9 through the hot gas bypass valve 11, so that the defrosting function is realized.
In order to provide the safety of hot gas bypass defrosting, a standby electromagnetic valve 12 is designed, when the exhaust superheat degree of a compressor 1 during defrosting is smaller than a safety value, the standby electromagnetic valve 12 is opened, a gas-liquid separator 14 serves as a liquid storage function, defrosting operation is changed into refrigerant gas circulation, redundant refrigerant liquid in an outdoor heat exchanger 9 is reserved in the gas-liquid separator 14 through the standby electromagnetic valve 12, and when defrosting is finished, the standby electromagnetic valve 12 is closed and returns to be normal.
When the high pressure discharged by the compressor 1 is lower than the set pressure of the condensing pressure regulating valve 6 during heating or cooling, the high-temperature gas passes through the condensing pressure regulating valve 6 through the oil separator 2 and the one-way valve 15, the high-temperature gas extrudes the refrigerant liquid in the liquid reservoir 7, and finally the liquid is stored in the condenser through circulation to submerge some heat exchange areas, so that the effective area of the condenser is reduced, and the high pressure is increased. After the high pressure rises, the condensing pressure regulating valve 6 is closed. In the refrigeration working condition, the condenser is an outdoor heat exchanger 9. In the heating working condition, the condenser is an indoor heat exchanger 5.
The protection scope of the present invention includes but is not limited to the above embodiments, the protection scope of the present invention is subject to the claims, and any replacement, deformation, and improvement that can be easily conceived by those skilled in the art made by the present technology all fall into the protection scope of the present invention.
Claims (6)
1. The utility model provides a full fresh air formula air conditioning system that directly expands which characterized in that: the oil separator comprises a compressor (1), an oil separator (2), an exhaust solenoid valve (3), a four-way reversing valve (4), a gas-liquid separator (14), a standby solenoid valve (12), an outdoor heat exchanger (9), an indoor heat exchanger (5), an electronic expansion valve (8), a liquid storage device (7), a hot gas bypass solenoid valve (10), a hot gas bypass valve (11), a condensation pressure regulating valve (6) and a plurality of one-way valves (15), wherein an outlet of the compressor (1) is connected with the oil separator (2), the oil separator (2) is respectively connected with the exhaust solenoid valve (3) and the hot gas bypass solenoid valve (10) through the one-way valves (15), the exhaust solenoid valve (3), the outdoor heat exchanger (9), the indoor heat exchanger (5) and the gas-liquid separator (14) are respectively connected with four ports of the four-way reversing valve (4), the indoor heat exchanger (5) is sequentially connected with the liquid storage device (7) through the one-way valves (15) and the condensation pressure regulating valve (6), reservoir (7) are connected with electronic expansion valve (8), electronic expansion valve (8) are connected with outdoor heat exchanger (9) through check valve (15), and electronic expansion valve (8) are connected with indoor heat exchanger (5) through check valve (15), outdoor heat exchanger (9) are connected with reservoir (7) through check valve (15), hot gas bypass solenoid valve (10) are connected with outdoor heat exchanger (9) through hot gas bypass valve (11), outdoor heat exchanger (9) are connected with vapour and liquid separator (14) through reserve solenoid valve (12), vapour and liquid separator (14) are connected with compressor (1).
2. The fresh air direct-expansion type air conditioning system according to claim 1, wherein: the oil separator (2) is also connected with the condensing pressure regulating valve (6) through a one-way valve (15).
3. The fresh air direct-expansion type air conditioning system according to claim 2, wherein: the number of the one-way valves (15) is 5.
4. The fresh air direct-expansion type air conditioning system according to claim 1, wherein: the outdoor heat exchanger is characterized by further comprising a hand valve (13), wherein one end of the hand valve (13) is connected with the outdoor heat exchanger (9), and the other end of the hand valve is connected with a hot gas bypass electromagnetic valve (10).
5. The fresh air direct-expansion type air conditioning system according to claim 1, wherein: the compressor (1) is a direct-current variable-frequency compressor.
6. The fresh air direct-expansion type air conditioning system according to claim 1, wherein: the device is characterized by further comprising a controller, wherein the controller is used for controlling the opening and closing of the exhaust electromagnetic valve (3), the standby electromagnetic valve (12), the electronic expansion valve (8) and the hot gas bypass electromagnetic valve (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121538864.0U CN215175652U (en) | 2021-07-07 | 2021-07-07 | Full fresh air direct expansion type air conditioning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121538864.0U CN215175652U (en) | 2021-07-07 | 2021-07-07 | Full fresh air direct expansion type air conditioning system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215175652U true CN215175652U (en) | 2021-12-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121538864.0U Active CN215175652U (en) | 2021-07-07 | 2021-07-07 | Full fresh air direct expansion type air conditioning system |
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| Country | Link |
|---|---|
| CN (1) | CN215175652U (en) |
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2021
- 2021-07-07 CN CN202121538864.0U patent/CN215175652U/en active Active
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