CN210688501U - Two-pipe double-cold-source all-year-round operation constant-temperature and constant-humidity air conditioning unit - Google Patents

Two-pipe double-cold-source all-year-round operation constant-temperature and constant-humidity air conditioning unit Download PDF

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Publication number
CN210688501U
CN210688501U CN201921056834.9U CN201921056834U CN210688501U CN 210688501 U CN210688501 U CN 210688501U CN 201921056834 U CN201921056834 U CN 201921056834U CN 210688501 U CN210688501 U CN 210688501U
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heat exchange
cold
condenser
constant
temperature
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侯东明
王四海
何赞香
洪家仕
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Tongfang Refine Energy Saving Technology Co ltd
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Tongfang Refine Energy Saving Technology Co ltd
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Abstract

The utility model discloses a two-pipe double-cold source annual operation constant temperature and humidity air conditioning unit, a communicated direct expansion system is arranged between an indoor side unit and an outdoor side unit; the direct expansion system comprises a first heat exchange device, a second heat exchange device, a cold conveying device, a reversing device, an electrodeless temperature regulating device and a throttling device, wherein the first heat exchange device and the second heat exchange device are used for exchanging heat; the first heat exchange device comprises an evaporator/a second condenser; the second heat exchange means comprises a second condenser/evaporator; the reversing device is respectively connected with the first heat exchange device, the second heat exchange device, the cold conveying device and the stepless temperature regulating device through pipelines; the utility model adopts the electrodeless temperature adjusting device to recover the condensation heat for heating and air supply, thereby meeting the requirements of constant temperature and humidity and realizing the purposes of energy conservation and high efficiency; the direct expansion system changes the flow channel of the refrigerant through the four-way reversing valve, changes the flow direction of the refrigerant, realizes the random conversion of two modes of cold supply and heat supply in transition seasons, and is not influenced by the single mode of centralized cold supply or heat supply of the two-pipe refrigeration hot water main engine.

Description

Two-pipe double-cold-source all-year-round operation constant-temperature and constant-humidity air conditioning unit
Technical Field
The utility model relates to an air conditioning unit technical field, especially are two pipe system double cold source constant temperature and humidity air conditioning unit of operation all the year round.
Background
The constant temperature and humidity air conditioning unit is widely applied to the fields of electronics, machine tools, textiles, medicines and the like, at present, for a common constant temperature and humidity air conditioning unit, when the indoor temperature and humidity are required to be reduced and dehumidified, an indoor heat exchanger is used for refrigerating and dehumidifying, the temperature and the relative humidity of air are regulated by heating the dehumidified air until the indoor constant temperature and humidity requirement is met, and the heating process is generally realized by utilizing electric heating. From the above, it is known that the conventional constant temperature and humidity air conditioner needs to use a high-power electric heater to further control the temperature and humidity during the processes of cooling, dehumidifying, heating and humidifying, and the electric heater has a disadvantage of low energy utilization rate. The invention adopts a brand new heating mode to replace the electric heater, meets the requirements of constant temperature and constant humidity, reduces the use of electric heating as much as possible and achieves the aims of energy saving and high efficiency. The solution of using the condensation heat recovery is a better method for solving the problems, and the related documents indicate that the energy consumption of the unit using the condensation heat recovery can be reduced by about 30 percent compared with the unit using the electric heating.
Due to the difference of the cold and hot internal loads of the room, a phenomenon that one part of an air conditioning area needs to be cooled and the other part needs to be heated often occurs in an excessive season. For a two-pipe air conditioning system, the cold and hot water main machine can only operate one mode of refrigeration or heating, so the phenomenon that the two areas are difficult to be taken into consideration can occur, the power distribution and heating of the air conditioning unit are required to be carried out before the two areas can meet the requirement of indoor constant temperature and humidity, the cold and hot water main machine operates the refrigeration mode to supply cold for the air conditioning area needing refrigeration, and the auxiliary electric heating supplies heat for the air conditioning area needing heating. From the above, it can be known that the ordinary over-season constant-temperature and constant-humidity air conditioner is an air conditioning area with different cold and hot loads, as long as any one area needs to supply cold, the cold and hot water main machines are in a refrigeration mode, and all other areas needing to supply heat are heated by using the electric heaters, and the mode of heating by using the electric heaters has the defect of low energy utilization rate. At present, the research on the constant-temperature and constant-humidity air conditioner used under the condition is less at home and abroad, and related energy-saving products are fewer. The invention adopts a brand-new two-pipe double-cold-source annual operation constant-temperature and constant-humidity air conditioning unit, meets the requirements of constant temperature and constant humidity, and can completely cancel the use of electric heating at the same time, thereby achieving the purposes of energy conservation and high efficiency.
Although the condensation heat utilization technology is not a new technology, the connection mode of a reheater and a condenser is parallel or serial, the flow direction of refrigerant firstly or secondly passes through the reheater and an air cooling unit, and the problem of how to take account of the influence of the refrigerant on condensation pressure in the condensation heat utilization process is still solved. And how to realize the random conversion of two modes of cold supply and heat supply in excessive seasons, and thoroughly solves the single mode influence of the centralized cold supply or heat supply of the two-pipe refrigeration and hot water main machine.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a two-pipe double-cold source annual operation constant temperature and humidity air conditioning unit, which recovers the condensation heat for heating and air supply, and achieves the purposes of energy saving and high efficiency while meeting the requirements of constant temperature and humidity; the direct expansion system changes the flow channel of the refrigerant through a four-way reversing valve arranged on the reversing device, changes the flow direction of the refrigerant, realizes the random conversion of two modes of cold supply and heat supply in excessive seasons, and thoroughly solves the problem of single mode of centralized cold supply or heat supply of the two-pipe refrigeration and hot water main machine.
The utility model discloses a following technical scheme realizes:
a two-pipe double-cold-source annual operation constant-temperature and constant-humidity air conditioning unit comprises an indoor unit and an outdoor unit; wherein: a communicated direct expansion system is arranged between the indoor side unit and the outdoor side unit; the direct expansion system comprises a first heat exchange device, a second heat exchange device, a cold conveying device, a reversing device, an electrodeless temperature regulating device and a throttling device, wherein the first heat exchange device and the second heat exchange device are used for heat exchange, the cold conveying device is used for conveying a refrigerant, the reversing device is used for changing the flow direction of the refrigerant, the electrodeless temperature regulating device is used for regulating the temperature and the humidity, and the throttling device is used for controlling and regulating the quantity and the pressure of the refrigerant liquid flowing into the first heat exchange; the first heat exchange device, the cold conveying device, the reversing device, the stepless temperature regulating device and the throttling device are arranged on the indoor unit; the second heat exchange device is arranged on the outdoor unit; the reversing device is respectively connected with the first heat exchange device, the second heat exchange device, the cold conveying device and the electrodeless temperature regulating device through pipelines.
Further, the first heat exchange device comprises an evaporator/second condenser; the second heat exchange device comprises a second condenser/evaporator corresponding to the first heat exchange device; one end of the evaporator/the second condenser is connected with the reversing device through a pipeline and then connected with one end of the cold conveying device through a pipeline, the other end of the cold conveying device is connected with one end of the stepless temperature regulating device through a pipeline, and the other end of the stepless temperature regulating device is connected with the reversing device through a pipeline; the reversing device is connected with one end of the second condenser/evaporator through a pipeline, the other end of the second condenser/evaporator is connected with one end of the throttling device through a pipeline, and the other end of the throttling device is connected with the other end of the evaporator/second condenser through a pipeline.
Furthermore, the reversing device comprises a four-way reversing valve, and the four-way reversing valve is respectively connected with the evaporator/second condenser, the second condenser/evaporator, the cold conveying device and the electrodeless temperature regulating device through pipelines.
Further, the electrodeless temperature adjusting device comprises a first condenser and a condensing fan; the first condenser is respectively connected with the four-way reversing valve and the cold conveying device through pipelines; the condensing fan set up in one side of first condenser, first condenser is retrieved behind the condensation heat and is carried out the reheat to the air supply, the condensing fan is through changing rotational speed regulation heat dissipation capacity and carrying the reheat air supply.
Further, the cold conveying device comprises a compressor; one end of the compressor is connected with the four-way reversing valve, and the other end of the compressor is connected with the first condenser.
Further, the throttling device comprises a throttling valve; and two ends of the throttle valve are respectively connected with the evaporator/second condenser and the second condenser/evaporator.
Further, the direct expansion system also comprises an indoor air conditioner blower used for conveying the air subjected to heat exchange to the indoor space; the indoor air conditioner blower is arranged on the indoor unit.
Further, the second heat exchange device also comprises an outdoor unit fan; and the outdoor unit fan is arranged on the second condenser/evaporator and used for dissipating heat when the air conditioning unit performs refrigeration.
Further, the double-cold-source system further comprises a surface cooler, the surface cooler is arranged on the upstream of the air flow of the evaporator/the second condenser, and the surface cooler ensures the disturbance of air heat exchange, so that the surface cooler is in a turbulent state, and the heat exchange efficiency is greatly improved.
Furthermore, the indoor side unit is also provided with an air filter for filtering indoor air; the air filter is arranged on an air inlet of the indoor unit.
The utility model has the advantages that:
the direct expansion system is provided with a double-cold-source mode of a surface cooler and an evaporator, the air is directly subjected to pre-cooling and dehumidification by using chilled water in summer, the air is deeply dehumidified by using a low-temperature cold source of the direct expansion system, and the electrodeless temperature regulating device is provided with a first condenser and a condensing fan; the first condenser recovers condensation heat and then reheats the supplied air, and the condensation fan conveys the reheated supplied air into a room. The air supply is heated through the recovered condensation heat so as to reach the required air supply temperature and humidity, thereby realizing the indoor constant temperature and humidity effect; the energy consumption of the unit adopting condensation heat recovery can be reduced by about 30 percent compared with the unit adopting electric heating, the constant temperature and humidity requirements are met, the use of electric heating is reduced as far as possible, and the purposes of energy conservation and high efficiency are achieved.
The direct expansion system is provided with a first heat exchange device and a second heat exchange device, a refrigerant in an evaporator/second condenser or a second condenser/evaporator directly completes heat exchange with air needing heat exchange, secondary heat exchange is not performed in the middle, the direct expansion system changes a flow channel of the refrigerant through a four-way reversing valve arranged on a reversing device, the flow direction of the refrigerant is changed, the functions of the evaporator and the condenser of the air conditioning unit are converted, and the conversion of the refrigeration and heating modes of the air conditioning unit is realized: the liquid of the refrigerating mode refrigerant is evaporated and absorbed in the evaporator to become gas, and the gas releases heat in the condenser and is used for indoor cooling; in the heating mode, the refrigerant liquid is evaporated in an outdoor condenser to absorb external heat, and is released in an indoor evaporator to supply heat indoors; the random conversion of two modes of cold supply and heat supply in excessive seasons can be realized, and the single mode influence of centralized cold supply or heat supply of the two-pipe refrigeration and hot water main machine is thoroughly solved.
Drawings
Fig. 1 is the overall structure schematic diagram of the constant temperature and humidity air conditioning unit according to the embodiment of the present invention.
Wherein: 1-indoor side unit, 2-outdoor side unit, 11-evaporator/second condenser, 12-compressor, 13-first condenser, 14-condensing fan, 15-four-way reversing valve, 16-throttle valve, 17-indoor air conditioner blower, 18-surface air cooler, 19-air filter, 21-second condenser/evaporator and 22-outdoor fan.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments, and the present invention will be described in detail with reference to the accompanying drawings and specific embodiments below according to the present invention.
As shown in fig. 1, a two-pipe double-cold source annual operation constant temperature and humidity air conditioning unit comprises an indoor unit 1 and an outdoor unit 2; wherein: a communicated direct expansion system is arranged between the indoor side unit 1 and the outdoor side unit 2; the direct expansion system comprises a first heat exchange device, a second heat exchange device, a cold conveying device, a reversing device, an electrodeless temperature regulating device and a throttling device, wherein the first heat exchange device and the second heat exchange device are used for heat exchange, the cold conveying device is used for conveying a refrigerant, the reversing device is used for changing the flow direction of the refrigerant, the electrodeless temperature regulating device is used for regulating the temperature and the humidity, and the throttling device is used for controlling and regulating the quantity and the pressure of the refrigerant liquid flowing into the first heat exchange; the first heat exchange device, the cold conveying device, the reversing device, the stepless temperature regulating device and the throttling device are arranged on the indoor unit 1; the second heat exchange device is arranged on the outdoor unit 2; the reversing device is respectively connected with the first heat exchange device, the second heat exchange device, the cold conveying device and the electrodeless temperature regulating device through pipelines.
Specifically, in this embodiment, the first heat exchange device includes an evaporator/second condenser 11; the second heat exchange device comprises a second condenser/evaporator 21 corresponding to the first heat exchange device; one end of the evaporator/second condenser 11 is connected with the reversing device through a pipeline and then connected with one end of the cold conveying device through a pipeline, the other end of the cold conveying device is connected with one end of the stepless temperature regulating device through a pipeline, and the other end of the stepless temperature regulating device is connected with the reversing device through a pipeline; the reversing device is connected with one end of the second condenser/evaporator 21 through a pipeline, the other end of the second condenser/evaporator 21 is connected with one end of the throttling device through a pipeline, and the other end of the throttling device is connected with the other end of the evaporator/second condenser 11 through a pipeline.
Specifically, in this embodiment, the cold sending device includes a compressor 12; the reversing device comprises a four-way reversing valve 15; one end of the compressor 12 is connected with the four-way reversing valve 15, and the other end is connected with the first condenser.
It should be noted that, the utility model discloses an during the air conditioning unit refrigeration, first heat transfer device does evaporimeter in evaporimeter/second condenser 11, it is corresponding, second heat transfer device is the second condenser in second condenser/evaporimeter 21, directly expands in the system liquid refrigerant in the evaporation coil of first heat transfer device direct evaporation (expansion) realization to the air outside the coil (also be the indoor side air of air conditioner) heat absorption and refrigeration, then, through the refrigerant after the compressor 12 will evaporate (expand) is carried to first condenser and second condenser, and the liquefaction of gaseous refrigerant is exothermic, becomes liquid, and the heat is released to atmosphere (also be the outdoor side air of air conditioner) simultaneously. The liquid refrigerant is decompressed by the throttling device and enters the first heat exchange device (the evaporator at the moment) of the indoor side unit 1 to be evaporated, gasified and absorbed to form gas, and meanwhile, the heat of indoor air is absorbed, so that the purpose of reducing the indoor temperature is achieved. The refrigerant that has become gas again enters the compressor 12 to start the next cycle.
Specifically, in the embodiment, the electrodeless temperature adjusting device includes a first condenser 13 and a condensing fan 14; the first condenser 13 is respectively connected with the four-way reversing valve 15 and the cold conveying device through pipelines; the condensing fan 14 is arranged at one side of the first condenser 13, the first condenser 13 recovers condensation heat and then reheats the supplied air, the condensing fan 14 adjusts heat dissipation capacity by changing the rotating speed and conveys the reheated supplied air, and when the required reheating capacity is large, the rotating speed of the condensing fan 14 can be increased and the heat dissipation capacity can be increased; when the required reheating quantity is less, the rotating speed of the condensing fan 14 can be reduced, and the heat dissipation quantity is reduced; thereby realizing the regulation of indoor temperature and humidity.
The electrodeless temperature adjusting device is provided with a first condenser 13 and a condensing fan 14; the first condenser 13 is configured to reheat cool air to be sent into a room after recovering condensation heat generated from an evaporator of the first heat exchanger through the four-way selector valve 15 and the compressor 12, and the condensing fan 14 is configured to send reheat air to an air supply portion of the indoor air conditioner air blower and send the reheat air into the room through the indoor air conditioner air blower. The reheat air supply is heated through the recovered condensation heat, so that the required air supply temperature and humidity are achieved, and the indoor constant temperature and humidity effect is achieved. The air supply is not required to be heated by an electric heating unit or other heating units, so that the constant temperature and humidity requirement is met, the use of electric heating is reduced as far as possible, and the purposes of energy conservation and high efficiency are achieved.
The evaporator/second condenser 11 and the second condenser/evaporator 21 have substantially the same structure as the first condenser 13, but have different coil lengths within their structures, and may have different coil lengths depending on the use and working environment.
Specifically, in the scheme of this embodiment, the four-way reversing valve 15 is connected to the evaporator/second condenser 11, the second condenser/evaporator 21, the cooling device and the electrodeless temperature adjusting device through pipelines.
It should be noted that the four-way reversing valve 15 can change the flow passage of the refrigerant, change the flow direction of the refrigerant, and change the functions of the condenser and the evaporator of the air conditioning unit, so as to realize the switching of the cooling and heating modes of the air conditioning unit: the liquid of the refrigerating mode refrigerant is evaporated and absorbed in the evaporator to become gas, and the gas releases heat in the condenser and is used for indoor cooling; the heating mode refrigerant liquid is evaporated in the outdoor condenser to absorb external heat and releases heat in the indoor evaporator for indoor heating.
It should be noted that, the utility model discloses an during the air conditioning unit heats, first heat transfer device does second condenser among evaporimeter/second condenser 11, it is corresponding, second heat transfer device is the evaporimeter among second condenser/evaporimeter 21, and the direct evaporation (expansion) of liquid refrigerant among the system of directly expanding realizes absorbing heat and refrigerating to the air outside the coil pipe (also being the outdoor air of air conditioner) in the evaporator coil pipe of second heat transfer device, and outdoor air becomes colder, then, through compressor 12 with the refrigerant after evaporation (expansion) carry to first condenser and first heat transfer device's second condenser, gaseous refrigerant liquefaction is exothermic, becomes liquid, and the heat is to indoor (also being the indoor air of air conditioner) release simultaneously. The liquid refrigerant is decompressed by the throttling device and enters the second heat exchange device (the evaporator at the moment) of the outdoor unit 2, is evaporated, gasified and absorbs heat to form gas, and simultaneously absorbs the heat of outdoor air, thereby achieving the purpose of improving the indoor temperature. The refrigerant that has become gas again enters the compressor 12 to start the next cycle.
Specifically, in this embodiment, the throttling device includes a throttling valve 16; the throttle valve 16 is connected at both ends to the evaporator/second condenser 11 and the second condenser/evaporator 21, respectively. It should be noted that the throttle valve 16 can change the direction of throttling according to the difference of the cooling or heating modes of the air conditioning unit, and is used for controlling and adjusting the amount and pressure of the refrigerant liquid flowing into the first heat exchange device or the second heat exchange device.
Specifically, in this embodiment, the direct expansion system further includes an indoor air conditioner blower 17 for delivering the heat-exchanged air to the indoor space; the indoor air conditioner blower 17 is provided in the indoor unit 1.
Specifically, in this embodiment, the second heat exchanging device further includes an outdoor fan 22; the outdoor fan 22 is disposed on the second condenser/evaporator 21; it should be noted that, when the air conditioning unit is refrigerating, the second heat exchanging device (in this case, the second condenser) and the outdoor unit fan 22 are used for dissipating heat when the air conditioning unit is refrigerating. When the air conditioning unit heats, the second heat exchanging device (in this case, an evaporator) and the outdoor unit fan 22 are used for cooling when the air conditioning unit heats.
Specifically, in this embodiment, the dual-cold-source system further includes a surface cooler 18, the surface cooler 18 is disposed on the upstream of the airflow of the evaporator/second condenser 11, and the surface cooler 18 ensures the disturbance of the air heat exchange, so that the air heat exchange is in a turbulent state, thereby greatly improving the heat exchange efficiency.
Specifically, in the present embodiment, the indoor unit 1 is further provided with an air filter 19 for filtering indoor air; the air filter 19 is disposed at an air inlet of the indoor unit 1. It should be noted that the air filter 19 filters dust or other impurities in the indoor air, and prevents the dust or other impurities from entering the indoor unit 1, which affects the normal operation of the air conditioning unit.
The direct expansion system is provided with a double-cold-source mode of a surface cooler 18 and an evaporator, air is directly subjected to pre-cooling and dehumidification by chilled water in summer, air is deeply dehumidified by a low-temperature cold source of the direct expansion system, and the electrodeless temperature regulating device is provided with a first condenser 13 and a condensing fan 14; the first condenser 13 recovers condensation heat and reheats the air, and the condensing fan 14 sends the reheated air into the room. The air supply is heated through the recovered condensation heat so as to reach the required air supply temperature and humidity, thereby realizing the indoor constant temperature and humidity effect; the energy consumption of the unit adopting condensation heat recovery can be reduced by about 30 percent compared with the unit adopting electric heating, the constant temperature and humidity requirements are met, the use of electric heating is reduced as far as possible, and the purposes of energy conservation and high efficiency are achieved.
The direct expansion system is provided with a first heat exchange device and a second heat exchange device, a refrigerant in the evaporator/second condenser 11 or the second condenser/evaporator 21 directly completes heat exchange with air needing heat exchange, secondary heat exchange is not performed in the middle, the direct expansion system changes a flow channel of the refrigerant through a four-way reversing valve 15 arranged on a reversing device, the flow direction of the refrigerant is changed, the functions of a condenser and an evaporator of an air conditioning unit are converted, and the conversion of the cooling mode and the heating mode of the air conditioning unit is realized: the liquid of the refrigerating mode refrigerant is evaporated and absorbed in the evaporator to become gas, and the gas releases heat in the condenser and is used for indoor cooling; the refrigeration mode refrigerant liquid evaporates in an outdoor condenser to absorb external heat, releases heat in an indoor evaporator and is used for indoor heat supply; the random conversion of two modes of cold supply and heat supply in excessive seasons can be realized, and the single mode influence of centralized cold supply or heat supply of the two-pipe refrigeration and hot water main machine is thoroughly solved.
The technical solutions provided by the embodiments of the present invention are described in detail above, and the principles and embodiments of the present invention are explained herein by using specific examples, and the descriptions of the above embodiments are only applicable to help understand the principles of the embodiments of the present invention; meanwhile, for a person skilled in the art, according to the embodiments of the present invention, there may be variations in the specific implementation manners and application ranges, and in summary, the content of the description should not be construed as a limitation to the present invention.

Claims (10)

1. A two-pipe double-cold-source annual operation constant-temperature and constant-humidity air conditioning unit comprises an indoor unit and an outdoor unit; the method is characterized in that: a communicated direct expansion system is arranged between the indoor side unit and the outdoor side unit; the direct expansion system comprises a first heat exchange device, a second heat exchange device, a cold conveying device, a reversing device, an electrodeless temperature regulating device and a throttling device, wherein the first heat exchange device and the second heat exchange device are used for heat exchange, the cold conveying device is used for conveying a refrigerant, the reversing device is used for changing the flow direction of the refrigerant, the electrodeless temperature regulating device is used for regulating the temperature and the humidity, and the throttling device is used for controlling and regulating the quantity and the pressure of the refrigerant liquid flowing into the first heat exchange; the first heat exchange device, the cold conveying device, the reversing device, the stepless temperature regulating device and the throttling device are arranged on the indoor unit; the second heat exchange device is arranged on the outdoor unit; the reversing device is respectively connected with the first heat exchange device, the second heat exchange device, the cold conveying device and the electrodeless temperature regulating device through pipelines.
2. The two-pipe double-cold-source annual operation constant-temperature and constant-humidity air conditioning unit as claimed in claim 1, characterized in that: the first heat exchange device comprises an evaporator/a second condenser; the second heat exchange device comprises a second condenser/evaporator corresponding to the first heat exchange device; one end of the evaporator/the second condenser is connected with the reversing device through a pipeline and then connected with one end of the cold conveying device through a pipeline, the other end of the cold conveying device is connected with one end of the stepless temperature regulating device through a pipeline, and the other end of the stepless temperature regulating device is connected with the reversing device through a pipeline; the reversing device is connected with one end of the second condenser/evaporator through a pipeline, the other end of the second condenser/evaporator is connected with one end of the throttling device through a pipeline, and the other end of the throttling device is connected with the other end of the evaporator/second condenser through a pipeline.
3. The two-pipe double-cold-source annual operation constant-temperature and constant-humidity air conditioning unit as claimed in claim 2, characterized in that: the reversing device comprises a four-way reversing valve, and the four-way reversing valve is respectively connected with the evaporator/second condenser, the second condenser/evaporator, the cold conveying device and the electrodeless temperature regulating device through pipelines.
4. The two-pipe double-cold-source annual operation constant-temperature and constant-humidity air conditioning unit according to claim 3, characterized in that: the electrodeless temperature adjusting device comprises a first condenser and a condensing fan; the first condenser is respectively connected with the four-way reversing valve and the cold conveying device through pipelines; the condensing fan set up in one side of first condenser, first condenser is retrieved behind the condensation heat and is carried out the reheat to the air supply, the condensing fan is through changing rotational speed regulation heat dissipation capacity and carrying the reheat air supply.
5. The two-pipe double-cold-source annual operation constant-temperature and constant-humidity air conditioning unit according to claim 4, characterized in that: the cold conveying device comprises a compressor; one end of the compressor is connected with the four-way reversing valve, and the other end of the compressor is connected with the first condenser.
6. The two-pipe double-cold-source annual operation constant-temperature and constant-humidity air conditioning unit as claimed in claim 2, characterized in that: the throttling device comprises a throttling valve; and two ends of the throttle valve are respectively connected with the evaporator/second condenser and the second condenser/evaporator.
7. The two-pipe double-cold-source annual operation constant-temperature and constant-humidity air conditioning unit as claimed in claim 1, characterized in that: the direct expansion system also comprises an indoor air conditioner blower used for conveying air subjected to heat exchange to the indoor space; the indoor air conditioner blower is arranged on the indoor unit.
8. The two-pipe double-cold-source annual operation constant-temperature and constant-humidity air conditioning unit as claimed in claim 2, characterized in that: the second heat exchange device also comprises an outdoor unit fan; and the outdoor unit fan is arranged on the second condenser/evaporator and used for dissipating heat when the air conditioning unit performs refrigeration.
9. The two-pipe double-cold-source annual operation constant-temperature and constant-humidity air conditioning unit as claimed in claim 2, characterized in that: the double-cold-source system further comprises a surface cooler, wherein the surface cooler is arranged on the upstream of the air flow of the evaporator/second condenser, and the surface cooler ensures the disturbance of air heat exchange, so that the surface cooler is in a turbulent flow state, and the heat exchange efficiency is improved.
10. The two-pipe double-cold-source annual operation constant-temperature and constant-humidity air conditioning unit as claimed in claim 1, characterized in that: the indoor side unit is also provided with an air filter for filtering indoor air; the air filter is arranged on an air inlet of the indoor unit.
CN201921056834.9U 2019-07-08 2019-07-08 Two-pipe double-cold-source all-year-round operation constant-temperature and constant-humidity air conditioning unit Active CN210688501U (en)

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CN201921056834.9U CN210688501U (en) 2019-07-08 2019-07-08 Two-pipe double-cold-source all-year-round operation constant-temperature and constant-humidity air conditioning unit

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Application Number Priority Date Filing Date Title
CN201921056834.9U CN210688501U (en) 2019-07-08 2019-07-08 Two-pipe double-cold-source all-year-round operation constant-temperature and constant-humidity air conditioning unit

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112484270A (en) * 2020-12-02 2021-03-12 珠海格力电器股份有限公司 Air conditioner and control method and control device thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112484270A (en) * 2020-12-02 2021-03-12 珠海格力电器股份有限公司 Air conditioner and control method and control device thereof

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