CN106369703B - Cave depot air conditioning unit - Google Patents

Cave depot air conditioning unit Download PDF

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Publication number
CN106369703B
CN106369703B CN201510437810.8A CN201510437810A CN106369703B CN 106369703 B CN106369703 B CN 106369703B CN 201510437810 A CN201510437810 A CN 201510437810A CN 106369703 B CN106369703 B CN 106369703B
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China
Prior art keywords
temperature
air
conditioning unit
humidity sensor
heat exchanger
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CN201510437810.8A
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CN106369703A (en
Inventor
程斌
王力波
刘佳庆
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ZHEJIANG DUNAN ELECTROMECHANICAL TECHNOLOGY CO LTD
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ZHEJIANG DUNAN ELECTROMECHANICAL TECHNOLOGY CO LTD
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/044Systems in which all treatment is given in the central station, i.e. all-air systems

Abstract

The invention discloses a cave depot air conditioning unit which comprises a compressor, a first proportion regulating valve, a water side heat exchanger, a four-way valve, a first heat exchanger, a second heat exchanger, a first one-way valve, a second one-way valve, a first throttling valve and a second throttling valve, wherein water is supplied to the water side heat exchanger by a water pump and returns water, an exhaust air temperature and humidity sensor is arranged at an exhaust air outlet of the air conditioning unit, a fresh air temperature and humidity sensor is arranged at a fresh air inlet of the air conditioning unit, a control system compares the temperature of the exhaust air temperature and humidity sensor with the temperature of the fresh air temperature and humidity sensor while ensuring that the temperature of supplied air meets the requirement, and automatically regulates the flow of the water pump, so that the temperature difference between the temperature of the exhaust air temperature and the temperature of the fresh air temperature.

Description

Cave depot air conditioning unit
Technical Field
The invention relates to the air conditioning technology.
Background
The conventional fresh air conditioning unit solves the problem of controlling the temperature and humidity of air supply at the fresh air side of the unit, does not control the air exhaust temperature of a use occasion, and directly discharges the air to the environment, so that the discharged air exhaust temperature cannot be approximate to the ambient temperature, and the aim of concealment cannot be achieved due to the fact that the discharged air exhaust temperature is easily detected by external infrared rays. The concealment performance of some special caverns is very important, but the conventional fresh air conditioning unit has insufficient attention to the special caverns, so that the use requirements of the caverns cannot be met.
Disclosure of Invention
The invention aims to provide a cave depot air conditioning unit, which solves the problem of engineering concealment while providing fresh air for a cave depot.
In order to solve the technical problems, the invention adopts the following technical scheme: a cave depot air conditioning unit comprises a compressor, a first proportional regulating valve, a water side heat exchanger, a four-way valve, a first heat exchanger, a second heat exchanger, a first check valve, a second check valve, a first throttling valve and a second throttling valve;
the refrigeration and dehumidification process of the air conditioning unit sequentially comprises the following steps: the system comprises a compressor, a first proportional control valve, a water side heat exchanger, a four-way valve, a first heat exchanger, a first one-way valve, a first throttling valve, a second heat exchanger, a four-way valve and a compressor;
the heating and humidifying process of the air conditioning unit sequentially comprises the following steps: a compressor, a first proportional control valve, a water side heat exchanger, a four-way valve, a second heat exchanger, a second one-way valve, a second throttle valve, a first heat exchanger, a four-way valve and a compressor,
the first heat exchanger is used as a condenser in a refrigerating state and used as an evaporator in a heating state, and the second heat exchanger is used as an evaporator in the refrigerating state and used as a condenser in the heating state;
the water side heat exchanger is supplied with backwater by a water pump, an exhaust temperature and humidity sensor is arranged at an exhaust outlet of the air conditioning unit, a fresh air temperature and humidity sensor is arranged at a fresh air inlet of the air conditioning unit, a control system can ensure that the supply air temperature meets requirements and simultaneously compares the exhaust temperature and the fresh air temperature and humidity sensor temperature, and the flow of the water pump is automatically adjusted, so that the temperature difference between the exhaust temperature and humidity sensor temperature and the fresh air temperature and humidity sensor temperature is controlled within a preset range.
Preferably, the flow of the water pump is automatically adjusted, so that the temperature difference between the temperature of the exhaust air temperature and humidity sensor and the temperature difference between the temperature of the fresh air temperature and humidity sensor are controlled within 3 ℃.
Preferably, the exhaust reheating device is further arranged and comprises a reheater, a second proportion adjusting valve and a third one-way valve, and the work flow of the exhaust reheating device sequentially comprises a compressor, the second proportion adjusting valve, the reheater, the third one-way valve, a first throttle valve, a second heat exchanger, a four-way valve and a compressor.
Preferably, the set fresh air humidity is compared with a humidity value measured by a fresh air temperature and humidity sensor, and if the set value is lower than the humidity value measured by the fresh air temperature and humidity sensor, the compressor is started to dehumidify.
Preferably, an air supply temperature and humidity sensor is arranged at an air supply opening of the air conditioning unit, the set air supply dry bulb temperature is compared with a dry bulb temperature value measured by the air supply temperature and humidity sensor, the proportion of the second proportion adjusting valve and the first proportion adjusting valve is automatically adjusted, and the exhaust reheating device performs exhaust reheating distribution control, so that the air supply enthalpy value of the unit is approximate to the set enthalpy value.
Preferably, an electric heater is further arranged, and if exhaust heat is insufficient or the compressor is not started, the electric heater is automatically started to supplement, so that the air supply enthalpy value of the unit is approximate to the set enthalpy value.
Preferably, the set fresh air dry bulb temperature is compared with the dry bulb temperature measured by the fresh air temperature and humidity sensor, and if the set value is higher than the dry bulb temperature measured by the fresh air temperature and humidity sensor, the compressor is started to heat.
Preferably, the high-pressure micro-mist humidifier is further arranged, an air supply temperature and humidity sensor is arranged at an air supply opening of the air conditioning unit, the set air supply humidity is compared with a humidity value measured by the air supply temperature and humidity sensor, the high-pressure micro-mist humidifier is adjusted, and humidification control is carried out, so that the air supply enthalpy value of the unit is approximate to the set enthalpy value.
Preferably, if the heating capacity is insufficient or defrosting is needed, the electric heater is automatically started, so that the air supply enthalpy value of the air conditioning unit is approximate to the set enthalpy value.
Preferably, a fresh air filter is arranged at a fresh air inlet of the air conditioning unit, a return air filter is arranged at a return air inlet of the air conditioning unit, and a water baffle is arranged on the outer side of the high-pressure micro-mist humidifier.
Preferably, the compressor adopts a variable frequency compressor or a compressor with an energy adjusting function, the water pump adopts a variable frequency water pump, and the electric heater is controlled by adopting proportion control.
According to the technical scheme, the flow of the water pump of the water side heat exchanger is adjusted while the constant enthalpy value of fresh air supply is ensured, so that the temperature difference between the temperature of the exhaust air temperature and humidity sensor and the temperature of the fresh air temperature and humidity sensor is controlled within a preset range, the purpose of camouflage is achieved, and the problem of underground engineering concealment is solved.
Drawings
The invention is further described with reference to the accompanying drawings and the detailed description below:
fig. 1 is a general installation structure view of an air conditioning unit for a cave depot according to the present invention;
FIG. 2 is a flow chart of the refrigeration and dehumidification process of the cave depot air conditioning unit;
fig. 3 is a heating and humidifying flow chart of the cave depot air conditioning unit.
Detailed Description
As shown in fig. 1 to 3, an air conditioning unit for caverns includes a compressor 3, a first proportional control valve 171, a water-side heat exchanger 12, a four-way valve 16, a first heat exchanger 2, a second heat exchanger 6, a first check valve 151, a second check valve 152, a third check valve 153, a first throttle valve 141, a second throttle valve 142, a reheater 7, an electric heater 8, a high-pressure fine mist humidifier 9, a blower 11, and an exhaust fan 4. The water side heat exchanger 12 is supplied with water by a water pump 13, an exhaust air temperature and humidity sensor 22 is arranged at an exhaust air outlet of the air conditioning unit, a fresh air temperature and humidity sensor 23 and a fresh air filter 5 are arranged at a fresh air inlet of the air conditioning unit, an air supply temperature and humidity sensor 21 is arranged at an air supply outlet of the air conditioning unit, an air return temperature and humidity sensor 24 and an air return filter 1 are arranged at an air return inlet of the air conditioning unit, air supply is controlled by an air supply blower 11, and exhaust air is. The compressor adopts a variable frequency compressor or a compressor with an energy adjusting function, and the water pump adopts a variable frequency water pump.
The whole unit consists of an upper layer box body and a lower layer box body, wherein the upper layer box body 31 is sequentially provided with a fresh air temperature and humidity sensor 23, a fresh air filter 5, a second heat exchanger 6, a reheater 7, an electric heater 8, a high-pressure micro-mist humidifier 9, a water baffle 10, a blower 11 and an air supply temperature and humidity sensor 21 from a right fresh air inlet to a left air supply outlet. The lower box 32 is provided with a return air temperature and humidity sensor 24, a return air filter 1, a first heat exchanger 2, a compressor 3, a water side heat exchanger 12, an exhaust fan 4 and an exhaust air temperature and humidity sensor 22 in sequence from a right return air inlet to a left exhaust air outlet.
The refrigeration and dehumidification process of the air conditioning unit sequentially comprises the following steps: the system comprises a compressor 3, a first proportional control valve 171, a water-side heat exchanger 12, a four-way valve 16, a first heat exchanger 2, a first check valve 151, a first throttle valve 141, a second heat exchanger 6, the four-way valve 16 and the compressor 3.
The heating and humidifying process of the air conditioning unit sequentially comprises the following steps: the system comprises a compressor 3, a first proportional control valve 171, a water-side heat exchanger 12, a four-way valve 16, a second heat exchanger 6, a second check valve 152, a second throttle valve 142, a first heat exchanger 2, a four-way valve 16 and the compressor 3.
The first heat exchanger 2 is used as a condenser in a cooling state and as an evaporator in a heating state, and the second heat exchanger 6 is used as an evaporator in a cooling state and as a condenser in a heating state.
In order to achieve the aim of concealment, the temperature difference of the temperature of the fresh air inlet at the exhaust air outlet is controlled within a preset range, generally within 3 ℃, and the optimal selection is equal.
Specifically, the temperature of the dry bulb of the exhaust air temperature and humidity sensor is compared with the temperature of the dry bulb of the fresh air temperature and humidity sensor, and the flow of the water pump 13 is adjusted, so that the temperature of the exhaust air temperature and humidity sensor is equal to the temperature of the fresh air temperature and humidity sensor.
In order to adjust the air supply enthalpy value of the unit, the air supply enthalpy value reaches the set requirement; summer or high humidity transition season: the wet bulb temperature of the air supply is realized according to the dehumidification of the compressor, and the dry bulb temperature of the air supply is realized through the work of the exhaust reheating device. The exhaust reheating device heats the supply air mainly by the reheater 7, and the work flow of the exhaust reheating device is sequentially the compressor 3, the second proportional control valve 172, the reheater 7, the third check valve 153, the first check valve 151, the first throttle valve 141, the second heat exchanger 6, the four-way valve 16, and the compressor 3. The set air supply dry bulb temperature is compared with the dry bulb temperature measured by the air supply temperature and humidity sensor 21, the proportion of the second proportion adjusting valve 172 and the proportion of the first proportion adjusting valve 171 are adjusted, exhaust reheating distribution control is carried out, and the air supply enthalpy value of the unit is approximate to the set enthalpy value. Winter or dry transition season: the temperature of the wet bulb of the air supply is controlled by high-pressure micro mist, and the temperature of the dry bulb of the air supply is realized by heating through a compressor. The set air supply wet bulb temperature is compared with the wet bulb temperature measured by the air supply temperature and humidity sensor 21, the proportion of the high-pressure micro-mist humidifier 9 is adjusted, and the humidification quantity distribution control is carried out, so that the air supply enthalpy value of the unit is approximate to the set enthalpy value.
In order to ensure the safe operation of the unit, the unit is provided with an electric heater 8 for standby; if the temperature and humidity of the air supply reach the set values, the electric heater 8 can be automatically started, so that the air supply enthalpy value of the air conditioning unit is approximate to the set enthalpy value.

Claims (10)

1. A cave depot air conditioning unit comprises a compressor, a first proportional regulating valve, a water side heat exchanger, a four-way valve, a first heat exchanger, a second heat exchanger, a first check valve, a second check valve, a first throttling valve and a second throttling valve;
the refrigeration and dehumidification process of the air conditioning unit sequentially comprises the following steps: the system comprises a compressor, a first proportional control valve, a water side heat exchanger, a four-way valve, a first heat exchanger, a first one-way valve, a first throttling valve, a second heat exchanger, a four-way valve and a compressor;
the heating and humidifying process of the air conditioning unit sequentially comprises the following steps: a compressor, a first proportional control valve, a water side heat exchanger, a four-way valve, a second heat exchanger, a second one-way valve, a second throttle valve, a first heat exchanger, a four-way valve and a compressor,
the first heat exchanger is used as a condenser in a refrigerating state and used as an evaporator in a heating state, and the second heat exchanger is used as an evaporator in the refrigerating state and used as a condenser in the heating state;
the water side heat exchanger is supplied with return water by a water pump, and is characterized in that:
the air-conditioning unit air exhaust outlet is provided with an air exhaust temperature and humidity sensor, the fresh air inlet is provided with a fresh air temperature and humidity sensor, the control system compares the temperature measured by the air exhaust temperature and humidity sensor with the temperature measured by the fresh air temperature and humidity sensor while ensuring that the air supply temperature meets the requirement, and the flow of the water pump is automatically adjusted, so that the temperature difference between the temperature measured by the air exhaust temperature and the temperature measured by the fresh air temperature and humidity sensor is controlled within a preset range.
2. The cavern air conditioning unit as recited in claim 1, wherein: the flow of the water pump is automatically adjusted, so that the temperature difference between the temperature measured by the exhaust air temperature and humidity sensor and the temperature measured by the fresh air temperature and humidity sensor is controlled within 3 ℃.
3. The cavern air conditioning unit as recited in claim 1, wherein: still be equipped with exhaust reheating device, exhaust reheating device includes reheater, second proportion regulating valve, third check valve, exhaust reheating device work flow is compressor, second proportion regulating valve, reheater, third check valve, first choke valve, second heat exchanger, cross valve, compressor in proper order.
4. The cavern air conditioning unit as recited in claim 3, wherein: and comparing the set fresh air humidity with the humidity value measured by the fresh air temperature and humidity sensor, and starting the compressor to dehumidify if the set value is lower than the humidity value measured by the fresh air temperature and humidity sensor.
5. The cavern air conditioning unit as recited in claim 4, wherein: an air supply temperature and humidity sensor is arranged at an air supply opening of the air conditioning unit, the set air supply dry bulb temperature is compared with a dry bulb temperature value measured by the air supply temperature and humidity sensor, the proportion of a second proportion adjusting valve and a first proportion adjusting valve is automatically adjusted, and an exhaust reheating device carries out exhaust reheating distribution control, so that the air supply enthalpy value of the unit is equal to the set enthalpy value.
6. The cavern air conditioning unit as recited in claim 5, wherein: the electric heater is also arranged, if the exhaust heat is insufficient or the compressor is not started, the electric heater is automatically started for supplement, so that the air supply enthalpy value of the unit is equal to the set enthalpy value.
7. The cavern air conditioning unit as recited in claim 6, wherein: and comparing the set fresh air dry bulb temperature with the dry bulb temperature measured by the fresh air temperature and humidity sensor, and starting the compressor to heat if the set value is higher than the dry bulb temperature measured by the fresh air temperature and humidity sensor.
8. The cavern air conditioning unit as recited in claim 7, wherein: the air conditioning unit is also provided with a high-pressure micro-mist humidifier, an air supply temperature and humidity sensor is arranged at an air supply port of the air conditioning unit, the set air supply humidity is compared with the humidity value measured by the air supply temperature and humidity sensor, the high-pressure micro-mist humidifier is adjusted, and humidification control is carried out, so that the air supply enthalpy value of the unit is equal to the set enthalpy value.
9. The cavern air conditioning unit as recited in claim 8, wherein: if the heating capacity is not enough or defrosting is needed, the electric heater is automatically started, so that the air supply enthalpy value of the air conditioning unit is equal to the set enthalpy value.
10. The cavern air conditioning unit as recited in claim 8, wherein: the fresh air inlet of the air conditioning unit is provided with a fresh air filter, the return air inlet of the air conditioning unit is provided with a return air filter, and the outer side of the high-pressure micro-mist humidifier is provided with a water baffle.
CN201510437810.8A 2015-07-23 2015-07-23 Cave depot air conditioning unit Active CN106369703B (en)

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CN201510437810.8A CN106369703B (en) 2015-07-23 2015-07-23 Cave depot air conditioning unit

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Application Number Priority Date Filing Date Title
CN201510437810.8A CN106369703B (en) 2015-07-23 2015-07-23 Cave depot air conditioning unit

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CN106369703A CN106369703A (en) 2017-02-01
CN106369703B true CN106369703B (en) 2020-03-20

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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109556219B (en) * 2018-11-12 2020-10-23 无锡欧龙德科技有限公司 Variable air volume air conditioning unit and control method thereof
CN111076277B (en) * 2019-12-09 2021-05-28 珠海格力电器股份有限公司 Energy-saving system and method for accurately controlling fresh air temperature and humidity and air conditioner
CN111271860B (en) * 2020-01-21 2020-10-20 中国人民解放军火箭军工程设计研究院 Exhaust temperature difference control system and control method by utilizing air duct beam wall and fan group

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202675511U (en) * 2012-07-11 2013-01-16 山东御嘉富尔达空调设备有限公司 Heat pump air conditioner with heat recovery function
JP2013124790A (en) * 2011-12-13 2013-06-24 Chofu Seisakusho Co Ltd Desiccant ventilation fan
CN203595225U (en) * 2013-11-26 2014-05-14 屹创能源工程(上海)有限公司 Fresh air heat recycling device for air conditioner

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013124790A (en) * 2011-12-13 2013-06-24 Chofu Seisakusho Co Ltd Desiccant ventilation fan
CN202675511U (en) * 2012-07-11 2013-01-16 山东御嘉富尔达空调设备有限公司 Heat pump air conditioner with heat recovery function
CN203595225U (en) * 2013-11-26 2014-05-14 屹创能源工程(上海)有限公司 Fresh air heat recycling device for air conditioner

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