CN117663263A - Efficient energy-saving air treatment system and control method thereof - Google Patents

Abstract

The invention relates to a high-efficiency energy-saving air treatment system and a control method thereof, wherein the air treatment system comprises an air conditioner external unit system and an air conditioner external unit system, the air conditioner external unit system comprises three heat exchangers, one air conditioner external unit system is provided with a liquid pipe, an exhaust pipe and an air return pipe, the other air conditioner external unit system is provided with only one liquid pipe and one exhaust pipe, the first heat exchanger is connected to the exhaust pipe and the air return pipe of the air conditioner external unit system with two air pipes through electromagnetic valve groups, the second heat exchanger is connected to the liquid pipe and the exhaust pipe of the air conditioner external unit system with two air pipes, the third heat exchanger is connected to the liquid pipe and the exhaust pipe of the air conditioner external unit system with one air pipe, and the electromagnetic valve groups comprise electromagnetic valves arranged on the exhaust pipe and the air return pipe. The first type heat exchanger and the second type heat exchanger can be repeatedly utilized for heat, so that the energy-saving effect is achieved.

Description

Efficient energy-saving air treatment system and control method thereof

Technical Field

The invention relates to the technical field of air conditioners, in particular to an efficient and energy-saving air treatment system and a control method thereof.

Background

The environment that relevant production workshops such as pharmacy, weaving, electronic equipment need constant temperature or constant temperature and humidity, need air treatment equipment to send into the workshop after handling outdoor air, and current mainstream air treatment equipment is water machine host computer and combination formula air treatment unit mode, and water machine host computer adds terminal equipment combination formula air treatment unit mode, and the water machine needs cooling tower relevant equipment, and initial investment is big, and occupation of land is many, unable reuse heat or cold volume, and is not enough energy-conserving, and system operation mode is single, and relevant unit initial investment is big, and the running cost is high.

Disclosure of Invention

In order to solve the problems of the prior art, the invention provides an efficient and energy-saving air treatment system and a control method thereof.

According to one aspect of the invention, an efficient and energy-saving air treatment system comprises an air conditioner external unit system and an air conditioner external unit system, wherein the air conditioner external unit system comprises three heat exchangers, two air conditioner external unit systems are arranged, one air conditioner external unit system is provided with a liquid pipe, an exhaust pipe and an air return pipe, the other air conditioner external unit system is only provided with one liquid pipe and one exhaust pipe, and a first heat exchanger in the air conditioner external unit system is connected to the exhaust pipe and the air return pipe of the air conditioner external unit system with two air pipes through electromagnetic valve groups and is connected with the liquid pipe through an electronic expansion valve; the second type heat exchanger in the air conditioner system is connected to a liquid pipe and an exhaust pipe of an air conditioner external unit system with two air pipes; the third heat exchanger in the air conditioner system is connected to a liquid pipe and an exhaust pipe of the air conditioner system with one air pipe, the electromagnetic valve group comprises electromagnetic valves arranged on the exhaust pipe and the air return pipe, the first heat exchanger and the second heat exchanger form a system with the air conditioner system with two air pipes, and the third heat exchanger forms a system II with the air conditioner system with one air pipe.

Preferably, the air conditioner external unit system with two air pipes at least comprises two heat exchangers, and the two heat exchangers are connected in parallel in the system and are respectively connected with a four-way reversing valve.

Preferably, the air conditioner system has at least two heat exchangers of a first type and at least two heat exchangers of a second type.

Preferably, the air conditioner external unit system having one air pipe includes at least one heat exchanger.

Preferably, the air handler system further comprises a first water baffle and a second water baffle, wherein the first water baffle and the second water baffle separate the three types of heat exchangers.

Preferably, the air handler system further comprises a humidifier disposed at a position between the second type of heat exchanger and the second water deflector.

Preferably, the air processor system further comprises a shell, a plate-type air valve, a filtering unit and a fan, wherein the plate-type air valve and the fan are respectively arranged at the head end and the tail end of the shell, and the filtering unit is arranged at the air outlet side of the plate-type air valve.

Preferably, the heat exchangers in the air conditioner external unit system with two air pipes share one compressor, one gas-liquid separator, one liquid storage device, one throttling assembly, one oil return assembly and one oil separator.

Preferably, the air conditioner external unit system having two air pipes has a hot gas bypass solenoid valve having one end connected to the four-way valve and the other end connected to the gas-liquid separator, and a liquid bypass solenoid valve having one end connected to the compressor and the other end connected to the accumulator.

The invention also provides a working method of the efficient and energy-saving air treatment system, which is characterized in that the efficient and energy-saving air treatment system has five operation modes:

the first operation mode is a high-temperature and high-humidity environment

The system is characterized in that a compressor of an air conditioner external unit system compresses a refrigerant into a high-temperature high-pressure gas, one part of the high-temperature high-pressure gas enters a second type heat exchanger through an exhaust pipe, the other part of the high-temperature high-pressure gas enters the heat exchanger of the air conditioner external unit system, the heat exchanger of the air conditioner external unit system condenses through the second type heat exchanger and the heat exchanger of the air conditioner external unit system, the high-temperature liquid refrigerant enters the first type heat exchanger for evaporation after being throttled by an electronic expansion valve of the first type heat exchanger, and the evaporated low-temperature low-pressure gas refrigerant flows back to a gas-liquid separator through an air return pipe and finally returns to the compressor to enter the next cycle;

the second operation mode is a high-temperature low-humidity environment

The system is characterized in that a compressor of an air conditioner external unit system compresses a refrigerant into high-temperature high-pressure gas, the high-temperature high-pressure gas enters a heat exchanger of the air conditioner external unit system, the high-temperature high-pressure gas is condensed by the heat exchanger of the air conditioner external unit system, high-temperature liquid refrigerant flows to an electronic expansion valve of a first type of heat exchanger through a liquid pipe to be throttled, the throttled refrigerant enters the first type of heat exchanger to be evaporated, and the evaporated low-temperature low-pressure gas flows back to a gas-liquid separator through a return pipe and finally returns to the compressor to enter the next cycle;

the third operation mode is a high humidity environment with proper temperature

The system is characterized in that a compressor of an air conditioner external unit system compresses a refrigerant into high-temperature high-pressure gas, the high-temperature high-pressure gas enters a second type heat exchanger through an exhaust pipe, the high-temperature high-pressure gas is condensed by the second type heat exchanger, the high-temperature liquid refrigerant flows to a first type heat exchanger, the high-temperature liquid refrigerant enters the first type heat exchanger for evaporation after being throttled by an electronic expansion valve of the first type heat exchanger, and the evaporated low-temperature low-pressure gas refrigerant flows back to a gas-liquid separator through an air return pipe and finally returns to the compressor to enter the next cycle;

the fourth operation mode is a low-temperature environment

The system is characterized in that a compressor of an air conditioner external unit system compresses a refrigerant into high-temperature high-pressure gas, the high-temperature high-pressure gas enters a first type heat exchanger and a second type heat exchanger through an exhaust pipe, the high-temperature high-pressure gas is condensed by the first type heat exchanger and the second type heat exchanger, the high-temperature liquid refrigerant flows to the heat exchanger of the air conditioner external unit system through a liquid pipe, is throttled by an electronic expansion valve of the heat exchanger of the air conditioner external unit system and then is evaporated in the heat exchanger of the air conditioner external unit system, and the evaporated low-temperature low-pressure gas refrigerant flows back to a gas-liquid separator through reversing of a four-way valve and finally returns to the compressor to enter the next cycle;

the compressor of the second air conditioner external unit system compresses the refrigerant into high-temperature high-pressure gas, the high-temperature high-pressure gas enters the third type of heat exchanger through the exhaust pipe, the high-temperature high-pressure gas is condensed through the third type of heat exchanger, the high-temperature liquid refrigerant is throttled by the electronic expansion valve of the third type of heat exchanger and flows to the heat exchanger of the air conditioner external unit system through the liquid pipe to evaporate, the evaporated low-temperature low-pressure gas refrigerant flows back to the gas-liquid separator through the four-way valve in a reversing way, and finally returns to the compressor to enter the next cycle;

operation mode five low temperature heating defrosting

When the system I is defrosted alternately with the system II, a compressor of an air conditioner external unit system compresses refrigerant into high-temperature high-pressure gas, one part of the high-temperature high-pressure gas enters a part of a first type heat exchanger and all second type heat exchangers through an exhaust pipe, the other part of the high-temperature high-pressure gas enters the heat exchangers of the air conditioner external unit system through reversing of a four-way valve, the high-temperature liquid refrigerant is condensed through the part of the first type heat exchangers, all second type heat exchangers and the heat exchangers of the air conditioner external unit system, flows to the rest part of the first type heat exchangers through liquid pipes, is throttled by an electronic expansion valve of the rest part of the first type heat exchangers and is evaporated in the rest part of the first type heat exchangers, and the evaporated low-temperature low-pressure gas refrigerant flows back to a gas-liquid separator through an air return pipe and finally returns to the compressor to enter the next circulation; the compressor of the second air conditioner external unit system compresses the refrigerant into high-temperature high-pressure gas, the high-temperature high-pressure gas flows to the third type of heat exchanger through the reversing of the four-way valve, the high-temperature liquid refrigerant is condensed by the third type of heat exchanger, throttled by the electronic expansion valve of the air conditioner external unit system heat exchanger, enters the heat exchanger of the air conditioner external unit system for evaporation, and the evaporated low-temperature low-pressure gas flows back to the gas-liquid separator through the reversing of the four-way valve and finally returns to the compressor to enter the next cycle;

when the second defrosting is performed, the compressor of the second air conditioner external unit system compresses the refrigerant into high-temperature high-pressure gas, the high-temperature high-pressure gas flows to the heat exchanger of the air conditioner external unit system through the four-way valve in a reversing way, after the high-temperature high-pressure liquid refrigerant is condensed by the heat exchanger of the air conditioner external unit system, the high-temperature liquid refrigerant enters the heat exchanger of the third type of heat exchanger to evaporate after being throttled by the electronic expansion valve of the third type of heat exchanger, and the evaporated low-temperature low-pressure gas flows back to the gas-liquid separator through the four-way valve in a reversing way and finally returns to the compressor to enter the next cycle; the system is characterized in that a compressor of an air conditioner external unit system compresses a refrigerant into high-temperature high-pressure gas, the high-temperature high-pressure gas enters a first type heat exchanger and a second type heat exchanger through an exhaust pipe, the high-temperature high-pressure gas is condensed by the first type heat exchanger and the second type heat exchanger, the high-temperature liquid refrigerant flows to the heat exchanger of the air conditioner external unit system through a liquid pipe, is throttled by an electronic expansion valve of the heat exchanger of the air conditioner external unit system and then is evaporated in the heat exchanger of the air conditioner external unit system, and the evaporated low-temperature low-pressure gas refrigerant flows back to a gas-liquid separator through a four-way valve in a reversing way and finally returns to the compressor to enter the next cycle.

The invention has the technical effects that the invention provides a high-efficiency energy-saving air treatment system, and the energy is recycled in the cooling, dehumidifying and then heating processes in the air treatment process by utilizing a mode of adding a combined air treatment unit to the external machine of the multi-split air conditioner, so that the energy-saving purpose is achieved, and the running mode of the system is changeable according to different temperature and humidity of the seasonal environment; the whole equipment occupies small area and has small initial investment.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.

Fig. 1 is a schematic diagram of an air treatment system with high efficiency and energy saving in this embodiment.

Fig. 2 is a refrigerant flow diagram of the air treatment system in the first mode of operation of the present embodiment.

Fig. 3 is a refrigerant flow diagram of the air treatment system in the second mode of operation with high efficiency and energy saving in this embodiment.

Fig. 4 is a refrigerant flow diagram of the third mode of operation of the air treatment system with high efficiency and energy saving in this embodiment.

Fig. 5 is a refrigerant flow diagram of the air treatment system in the fourth mode of operation with high efficiency and energy saving in this embodiment.

Fig. 6 is a refrigerant flow diagram of the air treatment system in the fifth mode of operation with high efficiency and energy saving in this embodiment.

Fig. 7 is another refrigerant flow diagram of the air handling system operating mode five with high efficiency and energy saving in this embodiment.

The drawing is marked:

the air conditioning outdoor unit system 1, the air treatment system 2, the first heat exchanger 101, the second heat exchanger 102, the first compressor 103, the first oil return unit 104, the first oil separator 105, the first check valve 106, the first four-way valve 107, the second four-way valve 108, the hot gas bypass solenoid valve 109, the liquid bypass solenoid valve 110, the first gas-liquid separator 112, the first electronic expansion valve 113, the second electronic expansion valve 114, the first subcooling heat exchanger 115, the second subcooling heat exchanger 116, the accumulator 117, the throttle unit 118, the first liquid pipe operating valve 119, the first exhaust operating valve 120, the return air operating valve 111, the third heat exchanger 121, the second compressor 122, the second gas-liquid separator 123, the second oil return unit 124, the second oil separator 125, the second check valve 126, the third four-way valve 127, the third electronic expansion valve 128, the second liquid pipe operating valve 129, the second exhaust operating valve 130, the fourth heat exchanger 201, the fifth heat exchanger 202, the sixth heat exchanger 203, the seventh heat exchanger 204, the eighth heat exchanger 205, the plate air valve 206, the filter unit 207, the filter unit 208, the third humidifier unit 121, the fourth electronic expansion valve 209, the fourth electronic expansion valve 308, the seventh electronic expansion valve 304, the fourth humidifier valve 308, the fourth electronic expansion valve 308, the seventh electronic expansion valve 304, the fourth electronic expansion valve 301, the fourth humidifier valve 308.

Wherein like parts are designated by like reference numerals throughout the several views; the figures are not drawn to scale.

Detailed Description

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise.

The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses.

Techniques and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate.

In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of exemplary embodiments may have different values.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

Examples

As shown in fig. 1, an efficient energy-saving air treatment system in this embodiment includes an air conditioner external unit system 1 and an air treatment unit system 2, where the air conditioner external unit system 1 includes two heat exchangers (a first heat exchanger 101, a second heat exchanger 102, and a third heat exchanger 121), and the air treatment unit system 2 includes five heat exchangers (a fourth heat exchanger 201, a fifth heat exchanger 202, a sixth heat exchanger 203, a seventh heat exchanger 204, and an eighth heat exchanger 205), specifically, the air conditioner external unit system 1 where the first heat exchanger 101 and the second heat exchanger 102 of this embodiment are located further includes a first compressor 103, a first oil return assembly 104, a first oil separator 105, a first check valve 106, a first four-way valve 107, a second four-way valve 108, a hot gas bypass solenoid valve 109, a liquid bypass solenoid valve 110, a first air-liquid separator 112, a first electronic expansion valve 113, a second electronic expansion valve 114, a first subcooling heat exchanger 115, a second subcooling heat exchanger 116, a liquid storage device 117, a throttling assembly 118, a first liquid storage tube operating valve 119, a first exhaust operating valve 120, and a return air operating valve 111, the first compressor 103 is connected with the first oil return assembly 104, the first oil separator 105, the first gas-liquid separator 112 and the liquid bypass electromagnetic valve 110, the first throttling assembly is sequentially connected with the first oil separator 105, the first one-way valve 106 and the first exhaust operation valve 120, the other end of the liquid bypass electromagnetic valve 110 is connected with the liquid storage 117, the first gas-liquid separator 112 is also connected with the gas return operation valve 111 and the throttling assembly 118, the first four-way valve 107 and the second four-way valve 108 are respectively connected with the gas return operation valve 111, the first one-way valve 106 and the first gas-liquid separator 112, and are respectively connected with the first heat exchanger 101, and one end of the hot gas bypass electromagnetic valve 109 is connected to the first one-way valve 106, the other end of the hot gas bypass electromagnetic valve 109 is connected to the first gas-liquid separator 112, the first heat exchanger 101 and the second heat exchanger 102 are respectively connected with the first electronic expansion valve 113 and the second electronic expansion valve 114, the first electronic expansion valve 113 and the second electronic expansion valve 114 are respectively connected with the first supercooling heat exchanger 115 and the second supercooling heat exchanger 116, the first supercooling heat exchanger 115 and the second supercooling heat exchanger 116 are respectively connected with the liquid storage 117, the liquid storage 117 is connected with the throttling assembly 118, and the throttling assembly 118 is connected with the liquid pipe operation valve 119. The throttling assembly 118 is comprised of a subcooling plate and an electronic expansion valve.

The air conditioner external unit system 1 where the third heat exchanger 121 of this embodiment is located further includes a second compressor 122, a second gas-liquid separator 123, a second oil return assembly 124, a second oil separator 125, a second one-way valve 126, a third four-way valve 127, a third electronic expansion valve 128, a second liquid pipe operation valve 129, and a second exhaust operation valve 130, where the second compressor 122 is connected to the second oil return assembly 124, the second oil separator 125, and the second gas-liquid separator 123, the second oil return assembly 124 is connected to the second oil separator 125, the second oil separator 125 is connected to the second one-way valve 126, the second one-way valve 126 is connected to the third four-way valve 127, the third four-way valve 127 is connected to the second gas-liquid separator 123, the second liquid pipe operation valve 129, and the third heat exchanger 121 is connected to the third electronic expansion valve 128 and the second exhaust operation valve 130. The first oil return assembly 104 and the second oil return assembly 124 are each composed of a solenoid valve and a capillary tube connected in series and then in parallel.

The air handler system 2 of the present embodiment further comprises a plate air valve 206, a filter unit 207, a first water baffle 208, a humidifier 209, a second water baffle 210, a fan 211, and a casing 212, wherein the fourth heat exchanger 201, the fifth heat exchanger 202, the sixth heat exchanger 203, the seventh heat exchanger 204, an eighth heat exchanger 205, the plate air valve 206, the filter unit 207, the first water baffle 208, the humidifier 209, the second water baffle 210, and the fan 211 are disposed in the casing 212, the plate air valve 206 and the fan 211 are respectively disposed at the front end and the rear end of the casing 212, a fourth heat exchanger 201 and a fifth heat exchanger 202 are disposed between the filter unit 207 and the first water baffle 208, a sixth heat exchanger 203 and a seventh heat exchanger 204 are disposed between the first water baffle 208 and the second water baffle 210, the humidifier 209 is disposed between the seventh heat exchanger 204 and the second water baffle 210, the eighth heat exchanger 205 is disposed between the second water baffle 210 and the fan 211, one path of the eighth heat exchanger 205 is connected to the second liquid pipe operation valve 129 through an eighth electronic expansion valve 309, and the other path is connected to the second exhaust operation valve 130. The pipeline where the second liquid pipe operation valve is located is a liquid pipe, and the pipeline where the second exhaust operation valve 130 is located is an exhaust pipe.

The fourth heat exchanger 201 has one path connected to the fourth electronic expansion valve 301 and connected to the first liquid pipe operation valve 119, and the other path connected to the first solenoid valve 302 and connected to the first exhaust operation valve 120, and connected to the second solenoid valve 303 and connected to the return air operation valve 111. The fifth heat exchanger 202 has one path connected to the fifth electronic expansion valve 304 and connected to the first liquid pipe operation valve 119, and the other path connected to the third electromagnetic valve 305 and connected to the first exhaust operation valve 120, and connected to the fourth electromagnetic valve 306 and connected to the return air operation valve 111. The sixth heat exchanger 203 is connected to the sixth electronic expansion valve 307 and connected to the first liquid pipe operation valve 119 in one path, and connected to the first exhaust operation valve 120 in the other path. The seventh heat exchanger 204 is connected to the seventh electronic expansion valve 308 in one path and connected to the first liquid pipe operation valve 119 in the other path and connected to the first exhaust operation valve 120. The air conditioner external unit system 1 where the first heat exchanger 101 and the second heat exchanger 102 are located and the air processor system 2 where the fourth heat exchanger 201, the fifth heat exchanger 202, the sixth heat exchanger 203 and the seventh heat exchanger 204 are located are combined into a system. The pipelines of the first electromagnetic valve 302 and the third electromagnetic valve 305 are exhaust pipes, and the pipelines of the second electromagnetic valve 303 and the fourth electromagnetic valve 306 are return pipes.

The eighth heat exchanger 205 is connected to the eighth electronic expansion valve 309 in one path and connected to the second liquid pipe operation valve 129 in the other path and connected to the second exhaust operation valve 130 in the other path. The air conditioner external unit system 1 where the third heat exchanger 121 is located and the air processor system 2 where the eighth heat exchanger 205 is located form a second system.

The following describes the working principle of the efficient and energy-saving air treatment system of the present embodiment:

operation mode one:

in a high-temperature and high-humidity environment in summer, for example, a production workshop needs air with the temperature of about 20 ℃ and the relative humidity of about 50%, and outdoor air needs to be cooled and dehumidified first and then heated, so that the process is carried out according to the flow shown in fig. 2. The fourth heat exchanger 201 and the fifth heat exchanger 202 serve as evaporators to cool and dehumidify high-temperature and high-humidity air, the sixth heat exchanger 203 and the seventh heat exchanger 204 serve as condensers to warm low-temperature and low-humidity air to a required temperature, redundant heat is discharged to the outside through the first heat exchanger 101 and the second heat exchanger 102 serving as condensers, the air is subjected to temperature and humidity measurement through a temperature and humidity sensor after passing through the seventh heat exchanger 204, the air cannot reach the requirements of being humidified through the humidifier 209, and the air is sent to a workshop after reaching the corresponding temperature and humidity. In this operation mode, the fourth electromagnetic valve 306 and the second electromagnetic valve 303 are in an open state, and the third electromagnetic valve 305 and the first electromagnetic valve 302 are in a closed state. The main flow direction of the refrigerant in the first system is as follows: part of the high-temperature and high-pressure gas compressed by the first compressor 103 flows to the sixth heat exchanger 203 and the seventh heat exchanger 204 through the exhaust pipe, part flows to the d port through the a port of the first four-way valve 107, part flows to the h port through the e port of the second four-way valve 108, flows to the first heat exchanger 101 and the second heat exchanger 102, flows to the fourth heat exchanger 201 and the fifth heat exchanger 202 through the liquid pipes after being condensed by the sixth heat exchanger 203, the seventh heat exchanger 204, the first heat exchanger 101 and the second heat exchanger 102, is throttled by the fourth electronic expansion valve 301 and the fifth electronic expansion valve 304, is evaporated, and the evaporated low-temperature and low-pressure gas flows to the return air pipe through the second electromagnetic valve 303 and the fourth electromagnetic valve 306, flows to the first gas-liquid separator 112 through the return air pipe, and returns to the return air port of the first compressor 103 for compression.

In the above process, the air is heated by the heat of the cooling treatment of the fourth heat exchanger 201 and the fifth heat exchanger 202 and the sixth heat exchanger 203 and the seventh heat exchanger 204, so that the heat is reused, the energy efficiency of the unit is improved, and the purpose of energy saving is achieved.

And an operation mode II:

in the high-temperature low-humidity environment in summer, only the outdoor air is required to be moderately cooled to the required temperature, and dehumidification is not required, and the process is carried out according to the flow shown in fig. 3. The fourth heat exchanger 201 and the fifth heat exchanger 202 serve as evaporators to moderately cool high-temperature air and send the cooled high-temperature air into workshops, heat is discharged outdoors through the first heat exchanger 101 and the second heat exchanger 102 serving as condensers, and only the fourth heat exchanger 201 operates as the evaporators according to a load state, the first heat exchanger 101 operates as the condensers, and other heat exchangers enable refrigerant not to circulate by closing corresponding electronic expansion valves. In this operation mode, the second solenoid valve 303 and the fourth solenoid valve 306 are in an on state, and the first solenoid valve 302 and the third solenoid valve 305 are in an off state. The main flow direction of the refrigerant in the first system is as follows: part of the high-temperature and high-pressure gas compressed by the first compressor 103 flows to the sixth heat exchanger 203 and the seventh heat exchanger 204 through the exhaust pipe, at this time, the sixth electronic expansion valve 307 and the seventh electronic expansion valve 308 are closed, the refrigerant does not circulate, part of the refrigerant is stored in the sixth heat exchanger 203 and the seventh heat exchanger 204, part of the refrigerant flows to the d port through the a port of the first four-way valve 107, part of the refrigerant flows to the h port through the e port of the second four-way valve 108, flows to the first heat exchanger 101 and the second heat exchanger 102, the high-temperature liquid condensed by the first heat exchanger 101 and the second heat exchanger 102 flows to the fourth heat exchanger 201 and the fifth heat exchanger 202, is throttled by the fourth electronic expansion valve 301 and the fifth electronic expansion valve 304 and then evaporated, and the low-temperature and low-pressure gas evaporated flows to the return air pipe through the second electromagnetic valve 303 and the fourth electromagnetic valve 306, flows to the first gas-liquid separator 112 through the return air pipe and returns to the return air port of the first compressor 103 for compression.

And an operation mode III:

in an environment where the temperature and humidity are high, it is necessary to dehumidify the outdoor air and then heat up the outdoor air, and the process is performed according to the flow shown in fig. 4. The fourth heat exchanger 201 and the fifth heat exchanger 202 serve as evaporators to cool and dehumidify high-humidity air, the sixth heat exchanger 203 and the seventh heat exchanger 204 serve as condensers to heat low-temperature and low-humidity air to a required temperature, the temperature and the humidity of the air are tested by a temperature and humidity sensor after the seventh heat exchanger 204, the air can be humidified by a humidifier 209 when the humidity does not reach the requirement, and the air is sent to a workshop after reaching the corresponding temperature and humidity. In this operation mode, the third solenoid valve 305 and the first solenoid valve 302 are in the closed state, the fourth solenoid valve 306 and the second solenoid valve 303 are in the open state, the outdoor fan is turned off, and the outdoor heat exchanger refrigerant does not flow. The main flow direction of the refrigerant in the first system is as follows: the high-temperature and high-pressure gas compressed by the first compressor 103 flows to the sixth heat exchanger 203 and the seventh heat exchanger 204 through the exhaust pipes, the high-temperature liquid condensed by the sixth heat exchanger 203 and the seventh heat exchanger 204 flows to the fourth heat exchanger 201, the fifth heat exchanger 202, the first heat exchanger 101 and the second heat exchanger 102, the first electronic expansion valve 113 and the second electronic expansion valve 114 are closed, at this time, the refrigerant does not circulate in the first heat exchanger 101 and the second heat exchanger 102, the refrigerant is evaporated in the fourth heat exchanger 201 and the fifth heat exchanger 202 after being throttled by the fourth electronic expansion valve 301 and the fifth electronic expansion valve 304, the evaporated low-temperature and low-pressure gas flows to the return air pipe through the fourth electromagnetic valve 306 and the second electromagnetic valve 303, flows to the first gas-liquid separator 112 through the return air pipe, and returns to the return air inlet of the first compressor 103 for compression.

In the process, the air is subjected to cooling treatment by the fourth heat exchanger 201 and the fifth heat exchanger 202, and is heated by the sixth heat exchanger 203 and the seventh heat exchanger 204, so that the heat is recycled, the energy efficiency of the unit is improved, and the purpose of energy conservation is achieved.

Operation mode four

In a low-temperature environment in winter, the outdoor air needs to be heated, and the process is performed according to the flow shown in fig. 5. According to the maximum load, the fourth heat exchanger 201, the fifth heat exchanger 202, the sixth heat exchanger 203 and the seventh heat exchanger 204 in the system at this time are used as condensers, the eighth heat exchanger 205 in the system two is used as a condenser to heat and raise the temperature of the low-temperature air, and the humidifier 209 humidifies the air to reach the corresponding temperature and humidity, and then the air is sent to a workshop. In this operation mode, the fourth solenoid valve 306 and the second solenoid valve 303 are in the closed state, and the third solenoid valve 305 and the first solenoid valve 302 are in the open state. The main flow direction of the refrigerant in the first system is as follows: the high-temperature high-pressure gas compressed by the first compressor 103 flows to the fourth heat exchanger 201, the fifth heat exchanger 202, the sixth heat exchanger 203 and the seventh heat exchanger 204 through exhaust pipes, the high-temperature liquid condensed by the fourth heat exchanger 201, the fifth heat exchanger 202, the sixth heat exchanger 203 and the seventh heat exchanger 204 flows to the first heat exchanger 101 and the second heat exchanger 102 along liquid pipelines, is throttled by the first electronic expansion valve 113 and the second electronic expansion valve 114 and then evaporated, and the evaporated low-temperature low-pressure gas flows to the c port through the d port of the first four-way valve 107 and the h port of the second four-way valve 108 and then flows to the g port through a return air pipe, flows to the first gas-liquid separator 112 through the return air pipe and then returns to the return air port of the first compressor 103 for compression. The main flow direction of the refrigerant in the second system is as follows: the high-temperature high-pressure gas compressed by the second compressor 122 flows to the k port through the j port of the third four-way valve 127, flows to the eighth heat exchanger 205 along a pipeline, flows to the third heat exchanger 121 along a pipeline, is throttled by the third electronic expansion valve 128 and then is evaporated, and the low-temperature low-pressure gas evaporated flows to the m port through the n port of the third four-way valve 127, flows to the second gas-liquid separator 123 and returns to the air return port of the second compressor 122 for compression.

Mode five of operation

Heating is performed in a low-temperature environment, and heat exchange of the outdoor unit frosts, in the embodiment, the first system and the second system can defrost alternately, and the air supply temperature is not affected. The first system defrost, the fifth heat exchanger 202 as an evaporator during defrost, the fourth heat exchanger 201, the sixth heat exchanger 203, the seventh heat exchanger 204 continue to function as a condenser, the first heat exchanger 101, the second heat exchanger 102 as a condenser defrost, and the eighth heat exchanger 205 of the second system continue to function as a condenser to heat the air. During defrosting of the second system, the fourth heat exchanger 201, the fifth heat exchanger 202, the sixth heat exchanger 203 and the seventh heat exchanger 204 in the second system are used as condensers to heat air, the third four-way valve 127 in the second system is reversed, the eighth heat exchanger 205 is used as an evaporator, and the third heat exchanger 121 is used as a condenser to defrost.

When the system is defrosted, the first electromagnetic valve 302 and the fourth electromagnetic valve 306 are opened, the second electromagnetic valve 303 and the third electromagnetic valve 305 are closed, and the main flow direction of the refrigerant is as follows: part of the high-temperature and high-pressure gas compressed by the first compressor 103 flows to the fourth heat exchanger 201, the seventh heat exchanger 204 and the sixth heat exchanger 203 through the exhaust pipes, part flows to the d port through the a port of the first four-way valve 107, part flows to the h port through the e port of the second four-way valve 108, flows to the first heat exchanger 101 and the second heat exchanger 102, high-temperature liquid condensed by the fourth heat exchanger 201, the seventh heat exchanger 204, the sixth heat exchanger 203, the first heat exchanger 101 and the second heat exchanger 102 flows to the fifth heat exchanger 202 along the liquid pipeline, is evaporated after being throttled by the fifth electronic expansion valve 304, and the evaporated low-temperature and low-pressure gas flows to the first gas-liquid separator 112 through the return air pipe and returns to the return air port of the first compressor 103 for compression. The refrigerant in the second system mainly flows: the high-temperature high-pressure gas compressed by the second compressor 122 flows to the k port through the j port of the third four-way valve 127, flows to the eighth heat exchanger 205 along a pipeline, flows to the third heat exchanger 121 along a pipeline, is throttled by the third electronic expansion valve 128 and then is evaporated, and the low-temperature low-pressure gas evaporated flows to the m port through the n port of the third four-way valve 127, flows to the second gas-liquid separator 123 and returns to the air return port of the second compressor 122 for compression.

When the second system is defrosted, the refrigerant in the second system mainly flows to: the high-temperature high-pressure gas compressed by the second compressor 122 flows to the n-port through the j-port of the third four-way valve 127, flows to the third heat exchanger 121 along a pipeline, flows to the eighth heat exchanger 205 along a pipeline, is throttled by the eighth electronic expansion valve 309 and evaporated, and the low-temperature low-pressure gas after evaporation flows to the m-port through the k-port of the third four-way valve 127, flows to the second gas-liquid separator 123 and returns to the gas return port of the second compressor 122 for compression. When the second system is defrosted, the indoor heat exchanger of the first system is used as a condenser to heat the air, the fourth electromagnetic valve 306 and the second electromagnetic valve 303 are in a closed state, and the third electromagnetic valve 305 and the first electromagnetic valve 302 are in an open state. The main flow direction of the refrigerant in the first system is as follows: the high-temperature high-pressure gas compressed by the first compressor 103 flows to the fourth heat exchanger 201, the fifth heat exchanger 202, the sixth heat exchanger 203 and the seventh heat exchanger 204 through exhaust pipes, the high-temperature liquid condensed by the fourth heat exchanger 201, the fifth heat exchanger 202, the sixth heat exchanger 203 and the seventh heat exchanger 204 flows to the first heat exchanger 101 and the second heat exchanger 102 along liquid pipelines, is throttled by the first electronic expansion valve 113 and the second electronic expansion valve 114 and then evaporated, the evaporated low-temperature low-pressure gas flows to the c port through the d port of the first four-way valve 107 and the h port of the second four-way valve 108 and then flows to the g port through an air return pipe, flows to the first gas-liquid separator 112 through the air return pipe and then returns to the air return port of the first compressor 103 for compression.

While certain specific embodiments of the invention have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims (10)

1. The efficient energy-saving air treatment system is characterized by comprising an air conditioner external unit system and an air conditioner external unit system, wherein the air conditioner external unit system comprises three heat exchangers, two air conditioner external unit systems are arranged, one air conditioner external unit system is provided with a liquid pipe, an exhaust pipe and an air return pipe, the other air conditioner external unit system is only provided with one liquid pipe and one exhaust pipe, and a first heat exchanger in the air conditioner external unit system is connected to the exhaust pipe and the air return pipe of the air conditioner external unit system with two air pipes through electromagnetic valve groups and is connected with the liquid pipe through an electronic expansion valve; the second type heat exchanger in the air conditioner system is connected to a liquid pipe and an exhaust pipe of an air conditioner external unit system with two air pipes; the third heat exchanger in the air conditioner system is connected to a liquid pipe and an exhaust pipe of the air conditioner system with one air pipe, the electromagnetic valve group comprises electromagnetic valves arranged on the exhaust pipe and the air return pipe, the first heat exchanger and the second heat exchanger form a system with the air conditioner system with two air pipes, and the third heat exchanger forms a system II with the air conditioner system with one air pipe.

2. The energy efficient air handling system according to claim 1, wherein the air conditioning outdoor unit system having two air ducts comprises at least two heat exchangers, wherein the two heat exchangers are connected in parallel in the system and are each connected to a four-way reversing valve.

3. The energy efficient air handling system according to claim 2, wherein the air conditioning system has at least two heat exchangers of a first type and at least two heat exchangers of a second type.

4. The energy efficient air handling system according to claim 1, wherein the air conditioning outdoor unit system having an air duct includes at least one heat exchanger.

5. The energy efficient air treatment system according to claims 1-4, further comprising a first water deflector and a second water deflector separating the three heat exchangers.

6. The energy efficient air treatment system according to claim 5, further comprising a humidifier disposed at a location between the second type of heat exchanger and the second water deflector.

7. The energy efficient air treatment system according to claim 6, further comprising a housing, a plate air valve, a filter unit, and a blower fan, wherein the plate air valve and the blower fan are disposed at the front end and the rear end of the housing, respectively, and the filter unit is disposed at the air outlet side of the plate air valve.

8. The energy efficient air handling system according to claim 2, wherein the heat exchangers in the air conditioning external unit system having two air ducts share a compressor, a gas-liquid separator, a liquid reservoir, a throttling assembly, an oil return assembly, and an oil separator.

9. The energy efficient air handling system according to claim 8, wherein the air conditioning external unit system having two air ducts has a hot gas bypass solenoid valve connected at one end to a four-way valve and at the other end to a gas-liquid separator and a liquid bypass solenoid valve connected at one end to a compressor and at the other end to a liquid reservoir.

10. A method of controlling an energy efficient air handling system, the method comprising:

the first operation mode is a high-temperature and high-humidity environment

The system is characterized in that a compressor of an air conditioner external unit system compresses a refrigerant into a high-temperature high-pressure gas, one part of the high-temperature high-pressure gas enters a second type heat exchanger through an exhaust pipe, the other part of the high-temperature high-pressure gas enters the heat exchanger of the air conditioner external unit system, the heat exchanger of the air conditioner external unit system condenses through the second type heat exchanger and the heat exchanger of the air conditioner external unit system, the high-temperature liquid refrigerant enters the first type heat exchanger for evaporation after being throttled by an electronic expansion valve of the first type heat exchanger, and the evaporated low-temperature low-pressure gas refrigerant flows back to a gas-liquid separator through an air return pipe and finally returns to the compressor to enter the next cycle;

the second operation mode is a high-temperature low-humidity environment

The system is characterized in that a compressor of an air conditioner external unit system compresses a refrigerant into high-temperature high-pressure gas, the high-temperature high-pressure gas enters a heat exchanger of the air conditioner external unit system, the high-temperature high-pressure gas is condensed by the heat exchanger of the air conditioner external unit system, high-temperature liquid refrigerant flows to an electronic expansion valve of a first type of heat exchanger through a liquid pipe to be throttled, the throttled refrigerant enters the first type of heat exchanger to be evaporated, and the evaporated low-temperature low-pressure gas flows back to a gas-liquid separator through a return pipe and finally returns to the compressor to enter the next cycle;

the third operation mode is a high humidity environment with proper temperature

The system is characterized in that a compressor of an air conditioner external unit system compresses a refrigerant into high-temperature high-pressure gas, the high-temperature high-pressure gas enters a second type heat exchanger through an exhaust pipe, the high-temperature high-pressure gas is condensed by the second type heat exchanger, the high-temperature liquid refrigerant flows to a first type heat exchanger, the high-temperature liquid refrigerant enters the first type heat exchanger for evaporation after being throttled by an electronic expansion valve of the first type heat exchanger, and the evaporated low-temperature low-pressure gas refrigerant flows back to a gas-liquid separator through an air return pipe and finally returns to the compressor to enter the next cycle;

the fourth operation mode is a low-temperature environment

The system is characterized in that a compressor of an air conditioner external unit system compresses a refrigerant into high-temperature high-pressure gas, the high-temperature high-pressure gas enters a first type heat exchanger and a second type heat exchanger through an exhaust pipe, the high-temperature high-pressure gas is condensed by the first type heat exchanger and the second type heat exchanger, the high-temperature liquid refrigerant flows to the heat exchanger of the air conditioner external unit system through a liquid pipe, is throttled by an electronic expansion valve of the heat exchanger of the air conditioner external unit system and then is evaporated in the heat exchanger of the air conditioner external unit system, and the evaporated low-temperature low-pressure gas refrigerant flows back to a gas-liquid separator through reversing of a four-way valve and finally returns to the compressor to enter the next cycle;

the compressor of the second air conditioner external unit system compresses the refrigerant into high-temperature high-pressure gas, the high-temperature high-pressure gas enters the third type of heat exchanger through the exhaust pipe, the high-temperature high-pressure gas is condensed through the third type of heat exchanger, the high-temperature liquid refrigerant is throttled by the electronic expansion valve of the third type of heat exchanger and flows to the heat exchanger of the air conditioner external unit system through the liquid pipe to evaporate, the evaporated low-temperature low-pressure gas refrigerant flows back to the gas-liquid separator through the four-way valve in a reversing way, and finally returns to the compressor to enter the next cycle;

operation mode five low temperature heating defrosting

When the system I is defrosted alternately with the system II, a compressor of an air conditioner external unit system compresses refrigerant into high-temperature high-pressure gas, one part of the high-temperature high-pressure gas enters a part of a first type heat exchanger and all second type heat exchangers through an exhaust pipe, the other part of the high-temperature high-pressure gas enters the heat exchangers of the air conditioner external unit system through reversing of a four-way valve, the high-temperature liquid refrigerant is condensed through the part of the first type heat exchangers, all second type heat exchangers and the heat exchangers of the air conditioner external unit system, flows to the rest part of the first type heat exchangers through liquid pipes, is throttled by an electronic expansion valve of the rest part of the first type heat exchangers and is evaporated in the rest part of the first type heat exchangers, and the evaporated low-temperature low-pressure gas refrigerant flows back to a gas-liquid separator through an air return pipe and finally returns to the compressor to enter the next circulation; the compressor of the second air conditioner external unit system compresses the refrigerant into high-temperature high-pressure gas, the high-temperature high-pressure gas flows to the third type of heat exchanger through the reversing of the four-way valve, the high-temperature liquid refrigerant is condensed by the third type of heat exchanger, throttled by the electronic expansion valve of the air conditioner external unit system heat exchanger, enters the heat exchanger of the air conditioner external unit system for evaporation, and the evaporated low-temperature low-pressure gas flows back to the gas-liquid separator through the reversing of the four-way valve and finally returns to the compressor to enter the next cycle;

when the second defrosting is performed, the compressor of the second air conditioner external unit system compresses the refrigerant into high-temperature high-pressure gas, the high-temperature high-pressure gas flows to the heat exchanger of the air conditioner external unit system through the four-way valve in a reversing way, after the high-temperature high-pressure liquid refrigerant is condensed by the heat exchanger of the air conditioner external unit system, the high-temperature liquid refrigerant enters the heat exchanger of the third type of heat exchanger to evaporate after being throttled by the electronic expansion valve of the third type of heat exchanger, and the evaporated low-temperature low-pressure gas flows back to the gas-liquid separator through the four-way valve in a reversing way and finally returns to the compressor to enter the next cycle; the system is characterized in that a compressor of an air conditioner external unit system compresses a refrigerant into high-temperature high-pressure gas, the high-temperature high-pressure gas enters a first type heat exchanger and a second type heat exchanger through an exhaust pipe, the high-temperature high-pressure gas is condensed by the first type heat exchanger and the second type heat exchanger, the high-temperature liquid refrigerant flows to the heat exchanger of the air conditioner external unit system through a liquid pipe, is throttled by an electronic expansion valve of the heat exchanger of the air conditioner external unit system and then is evaporated in the heat exchanger of the air conditioner external unit system, and the evaporated low-temperature low-pressure gas refrigerant flows back to a gas-liquid separator through a four-way valve in a reversing way and finally returns to the compressor to enter the next cycle.