CN211261005U

CN211261005U - Single cold heat source fresh air humidifying unit

Info

Publication number: CN211261005U
Application number: CN201922260282.XU
Authority: CN
Inventors: 薛明明; 王宏革; 毕承志
Original assignee: Hunan Hongxiang Indoor Climate Technology Co ltd
Current assignee: Hunan Hongxiang Indoor Climate Technology Co ltd
Priority date: 2019-12-16
Filing date: 2019-12-16
Publication date: 2020-08-14
Anticipated expiration: 2029-12-16

Abstract

The utility model belongs to a fresh air humidifying unit, in particular to a fresh air humidifying unit with single cold heat source, which comprises an indoor unit and an outdoor unit, wherein the indoor unit comprises an air inlet, a filter screen component, an evaporator, a reheating condenser, a humidifier, a fan and an air outlet which are arranged in sequence, the outdoor unit comprises a four-way valve, a compressor, a condenser and an outdoor expansion valve which form a loop with the evaporator, the compressor and the condenser are all connected with the four-way valve, a radiator is arranged on the condenser, the reheating condenser is connected with the condenser in parallel through a pipeline, the reheating condenser is provided with the reheating expansion valve on the pipeline close to the evaporator, the single cold heat source is adopted to treat air, the heating temperature of the reheating condenser is controlled by adjusting the flow ratio of the reheating expansion valve and a main expansion valve, the adjusting process is simple and flexible.

Description

Single cold heat source fresh air humidifying unit

Technical Field

The utility model belongs to a fresh air humidifying unit specifically is to involve a single cold heat source fresh air humidifying unit.

Background

With the improvement of life quality, the requirements of people on living environment are continuously improved. In the house and the working environment, not only is there a fresh air system for indoor and outdoor ventilation, but also there is corresponding air treatment equipment for the temperature, humidity and PM2.5 content in the air. For a set of new house, the optional air conditioning equipment includes fresh air purification system that indoor and outdoor takes a breath, the air conditioning system of regulation indoor temperature, the dehumidification system of regulation indoor humidity, winter humidification system etc. too much pipeline design not only the installation degree of difficulty is big, has increased design and construction cost moreover, has also brought the trouble for subsequent maintenance.

In the existing double-cold-source fresh air unit, the heat pump water machine provides cold water to pre-cool fresh air during dehumidification, and the direct expansion system performs deep dehumidification and temperature adjustment. The direct expansion system is provided with a main condenser and an auxiliary condenser, the auxiliary condenser recovers part of condensation heat to heat the dehumidified air, and the main condenser discharges the condensation heat. The condensation heat discharged by the main condenser of the existing double-cold-source fresh air handling unit is directly discharged to the heat pump water machine, and the cold water heated after absorbing the condensation heat is cooled by the heat pump water machine and then recycled. And the heat pump water machine is used for cooling the cold water heated after absorbing the condensation heat, so that redundant energy is consumed, and the energy efficiency ratio of the system is reduced.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a single cold heat source fresh air humidifying unit convenient to adjust humiture, compact structure.

The utility model discloses an content includes indoor set and off-premises station, the indoor set is including air intake, filter screen subassembly, evaporimeter, reheat condenser, humidifier, fan and the air outlet that sets gradually, the off-premises station includes the cross valve and constitutes compressor, condenser and the outdoor expansion valve in return circuit with the evaporimeter, compressor and condenser all are connected with the cross valve, are provided with the radiator on the condenser, reheat condenser passes through the pipeline and connects in parallel with the condenser, and reheat condenser is provided with reheat expansion valve near on the evaporimeter place pipeline.

Furthermore, a main expansion valve is arranged between the evaporator and the condenser and on one side close to the evaporator, the main expansion valve and the outdoor expansion valve are alternatively used, the main expansion valve is connected with a one-way valve facing the condenser in parallel, and the outdoor expansion valve is connected with a one-way valve facing the evaporator in parallel.

Furthermore, a filter is arranged on a pipeline of one side of the condenser and a pipeline of the reheat condenser, which are close to the evaporator.

Furthermore, the air inlet comprises a return air valve communicated with indoor air and a fresh air valve communicated with outdoor air.

Furthermore, an ultraviolet lamp is arranged between the humidifier and the fan.

Furthermore, the fan is a centrifugal fan,

furthermore, the radiator is an axial flow fan,

furthermore, the filter screen component comprises a primary filter, a medium filter and a high efficiency filter which are arranged in sequence.

Furthermore, the primary filter and the high-efficiency filter are provided with a wind pressure difference switch.

The utility model discloses still include control system, control system includes the controller and is connected temperature sensor, temperature and humidity sensor and the pressure sensor with the controller electricity, temperature sensor set up in between evaporimeter and the reheat condenser, temperature and humidity sensor sets up on air intake and air outlet, pressure sensor sets up on compressor suction and exhaust pipeline, the controller still is connected with compressor, fan and radiator electricity.

The utility model has the advantages that the utility model adopts a single cold heat source to treat air, avoids the situation that for example a double-cold source fresh air dehumidifying unit in the current market needs a water system to run in a matching way, increases the energy efficiency ratio of the system, and in the dehumidification mode, the heating temperature control of the reheating condenser can be realized by adjusting the flow ratio of the reheating expansion valve and the main expansion valve, thus realizing stepless adjustment and simple and flexible adjustment process; the reheating condenser improves the temperature of the air cooled and dehumidified by the evaporator by recovering condensation heat, reduces the selection of other heating accessories and reduces the production cost and energy consumption of the unit; compared with a double-cold-source humidifying unit, the condenser does not need to be cooled by a heat pump water machine, so that the energy efficiency ratio of the system is improved;

the fresh air humidifying unit has the functions of dehumidifying, cooling and temperature regulating of fresh air in summer; the humidifier has the functions of humidifying and heating in winter; the ventilation function is realized in the transition season, and the adaptability and the comfort are high; compact overall structure, high efficiency and energy saving.

Drawings

Fig. 1 is a schematic diagram of the system during dehumidification according to the present invention.

Fig. 2 is the working principle diagram of the four-way valve during dehumidification of the utility model.

Fig. 3 is a schematic diagram of the system during heating according to the present invention.

Fig. 4 is a working principle diagram of the four-way valve in heating of the utility model.

In the figure, a return air valve 1, a fresh air valve 2, a primary filter 3, a secondary filter 4, a high-efficiency filter 5, an evaporator 6, a reheat condenser 7, a humidifier 8, an ultraviolet lamp 9, a fan 10, an air outlet 11, a reheat expansion valve 12, a main expansion valve 13, a compressor 14, a four-way valve 15, an outdoor expansion valve 16, an axial flow fan 17, a condenser 18 and an oil separator 19 are arranged.

Detailed Description

As shown in fig. 1-4, the present invention includes an indoor unit and an outdoor unit, the indoor unit includes an air inlet, a filter screen assembly, an evaporator 6, a reheat condenser 7, a humidifier 8, a fan 10 and an air outlet 11, which are sequentially arranged along an air circulation direction, and the filter screen assembly is a component for filtering air; the evaporator 6 is a component for cooling, dehumidifying or heating air; the reheating condenser 7 is used for heating the air after refrigeration and dehumidification when the evaporator 6 refrigerates and dehumidifies the air; the humidifier 8 is used for humidifying the heated air when the evaporator 6 heats the air; the fan 10 is used for supplying air to the indoor unit from the air inlet side to the air outlet 11 side in a positive pressure manner, the outdoor unit is used for providing a heat source or a cold source for the evaporator 6 and the reheat condenser 7, and comprises a four-way valve 15, a compressor 14, a condenser 18 and an outdoor expansion valve 16, wherein the compressor 14, the condenser 18 and the outdoor expansion valve 16 form a loop with the evaporator 6, the compressor 14 and the condenser 18 are all connected with oil ports corresponding to the four-way valve 15, the flow direction of a refrigerant can be adjusted by adjusting the four-way valve 15, so that the evaporator 6 is controlled to refrigerate and dehumidify the air or heat the air, the condenser 18 is provided with a radiator, the radiator is used for radiating heat or releasing cold energy of the condenser 18, the reheat condenser 7 is connected with the condenser 18 in parallel through a pipeline, the reheat condenser 7 is used for recovering part of condensation heat to heat, the output ratio of the reheat expansion valve 12 and the main expansion valve 13 is adjusted to adjust the ratio of the amount of heat of the refrigerant discharged from both the reheat condenser 7 and the condenser 18.

A main expansion valve 13 is arranged between the evaporator 6 and the condenser 18 and on one side close to the evaporator 6, the main expansion valve 13 is selected from the outdoor expansion valves 16 for use, in a dehumidification mode, the outdoor expansion valve 16 is closed, and the main expansion valve 13 works to reduce the pressure of the refrigerant flowing out of the condenser 18 and having high pressure and normal temperature; in the heating mode, the main expansion valve 13 is closed, and the outdoor expansion valve 16 is operated to reduce the pressure of the high-pressure normal-temperature refrigerant flowing out of the evaporator 6;

a main expansion valve 13 and an outdoor expansion valve 16 which are respectively used for refrigerating and heating of the evaporator 6 are arranged between the condenser 18 and the evaporator 6, the main expansion valve 13 is arranged at one side close to the evaporator 6, and the outdoor expansion valve 16 is arranged at one side close to the condenser 18, so that the situation that in the heating mode, the refrigerant is changed into low-pressure low-temperature liquid refrigerant through the evaporator 6 and the main expansion valve 13 firstly and then is conveyed to the condenser 18 through a long pipeline can be avoided, and the condition that the service life of the pipeline is influenced by the fact that the low-pressure low-temperature liquid refrigerant flows through.

A check valve arranged toward the condenser 18 is connected in parallel to the main expansion valve 13; the outdoor expansion valve 16 is connected in parallel with a check valve provided toward the evaporator 6, thereby ensuring communication of the pipe when the main expansion valve 13 is used in alternative to the outdoor expansion valve 16.

The condenser 18 and the reheat condenser 7 are provided with filters on the side pipelines close to the evaporator 6, the filters are preferably copper filters, and the copper filters are used for filtering the refrigerant and preventing impurity particles in the refrigerant from blocking the expansion valve when the impurity particles pass through the expansion valve.

The air inlet comprises an air return air valve 1 communicated with indoor air and a fresh air valve 2 communicated with outdoor air, three air inlet modes of full fresh air, fresh air mixing and full return air can be switched by adjusting the air inlet proportion of the air return air valve 1 and the fresh air valve 2, and the proportion of the air return air valve 1 can be properly increased under the condition that the oxygen in the indoor air is enough, so that the cold quantity or the heat quantity required to be generated in the humidifying or heating mode of the humidifying unit can be reduced, and the effect of reducing the energy consumption is achieved.

An ultraviolet lamp 9 is further arranged between the humidifier 8 and the fan 10, and the ultraviolet lamp 9 is used for sterilizing the processed air, so that the air quality is improved.

The radiator is an axial flow fan 17, the air volume of the axial flow fan 17 is large, and the condenser 18 can be effectively radiated.

The filter screen subassembly is including the primary filter 3, the secondary filter 4 and the high efficiency filter 5 that set gradually, through setting up the three-layer filter screen, effectively filters new trend or return air.

Be provided with the wind pressure differential switch on primary filter 3 and the high efficiency filter 5, the wind pressure differential switch is used for detecting the jam condition of filter screen subassembly, and it is more to detect the wind pressure differential before primary filter 3 and after the high efficiency filter 5, and the wind pressure differential switch just carries out work, produces to report to the police and reminds the staff in time to change or wash the filter screen subassembly.

The utility model also comprises a control system, the control system comprises a controller, and a temperature sensor, a temperature and humidity sensor and a pressure sensor which are electrically connected with the controller, the temperature sensor is arranged between the evaporator 6 and the reheating condenser 7, the temperature and humidity sensor is arranged on the air inlet and the air outlet 11, the pressure sensor is arranged on a suction and exhaust pipeline of the compressor 14, the controller is also electrically connected with the compressor 14, the fan 10, the axial flow fan 17, the reheating expansion valve 12, the main expansion valve 13 and the outdoor expansion valve 16, the control system realizes the automatic operation of the humidity adjusting unit, wherein, the controller adopts an industrial control level single chip microcomputer chip, the temperature sensor, the temperature and humidity sensor and the pressure sensor are arranged on each node of the unit, the temperature parameter acquisition module is used for acquiring the temperature parameters of all the measurement points as the basis of control parameters for intelligent control of the controller; for the convenience of control, the electronic expansion valves are preferably used for the reheat expansion valve 12, the main expansion valve 13 and the outdoor expansion valve 16.

The utility model discloses a concrete theory of operation:

the utility model discloses have the dehumidification mode, heat the mode, ventilate the mode and four kinds of modes of intelligent mode, specifically as follows:

a dehumidification mode: as shown in fig. 1 and 2, the refrigerant flows in the direction indicated by the arrow in the figure, the liquid refrigerant with low pressure and low temperature flows into the evaporator 6, absorbs the heat of the air flowing through the surface of the evaporator 6, because the surface temperature of the evaporator 6 is lower than the dew point temperature of the humid air, the water vapor in the air is condensed into water on the surface of the evaporator 6, and the water is dropped into the water tray and then discharged out of the unit, thereby reducing the temperature and humidity in the air and carrying out temperature reduction and dehumidification.

As shown in fig. 2, the low-pressure and low-temperature gaseous refrigerant having absorbed heat from the evaporator 6 flows into the compressor 14 through the four-way valve 15, compresses the refrigerant, changes its phase into a high-temperature and high-pressure gaseous refrigerant, passes through the oil separator 19, and flows out through the four-way valve 15. The high-temperature high-pressure gaseous refrigerant flowing out of the four-way valve 15 respectively enters the condenser 18 and the reheating condenser 7 which are connected in parallel with each other through shunting, the high-temperature high-pressure gaseous refrigerant is changed into a high-pressure normal-temperature liquid refrigerant, the high-temperature high-pressure gaseous refrigerant entering the reheating condenser 7 heats the air cooled and dehumidified by the evaporator 6 to a specified temperature, and enters the room after being sterilized by the ultraviolet lamp 9, so that the functions of dehumidification and constant temperature are completed without adding other heating equipment again; another part of the high-temperature high-pressure gaseous refrigerant is radiated by the condenser 18 and discharged to the outside in cooperation with the axial flow fan 17.

The heating temperature of the reheat condenser 7 to the air is determined by the flow rate of the high-temperature high-pressure gas refrigerant distributed to the reheat condenser 7, that is, by adjusting the flow rate ratio of the reheat expansion valve 12 and the main expansion valve 13, it is preferable that the reheat expansion valve 12 and the main expansion valve 13 are opened and closed in a linked manner, the opening flow rate of the main expansion valve 13 is small when the opening flow rate of the reheat expansion valve 12 is large, the high-temperature high-pressure gas refrigerant passing through the reheat condenser 7 is large, the heating temperature to the air is high, and conversely, the heating temperature to the air is low when the high-temperature high-pressure gas refrigerant passing. In the dehumidification mode, the outdoor expansion valve 16 is always closed, and the refrigerant flowing out of the condenser 18 flows into the main expansion valve 13 through the check valve connected in parallel to the outdoor expansion valve 16, and at this time, the refrigerant flows in the opposite direction to the check valve connected in parallel to the main expansion valve 13, and therefore, the refrigerant flows only to the main expansion valve 13, passes through the main expansion valve 13, is phase-changed into a low-pressure and low-temperature liquid refrigerant, and then flows into the evaporator 6 to absorb heat.

The air is dehumidified and tempered in this way.

In the dehumidification mode, because the main expansion valve 13 is arranged on one side close to the evaporator 6, the liquid refrigerant which is phase-changed into low-pressure low-temperature at the moment quickly enters the evaporator 6 to absorb heat, so that the influence of the low-pressure low-temperature liquid refrigerant on a pipeline can be reduced, and the service life is prolonged.

In the dehumidification mode, since there is no need to humidify the air, the humidifier 8 is always in the off state.

In the dehumidification mode, the reheat expansion valve 12 is closed, and the humidity control unit cools only the air.

Heating mode: as shown in fig. 3 and 4, the refrigerant flows in the direction indicated by the broken line arrows in the drawing, and at this time, the evaporator 6 is used for heat radiation, the condenser is used for heat absorption, and it is not necessary to dehumidify the air passing through the humidity control unit, and the evaporator 6 and the reheat condenser 7 in the indoor unit have opposite influences on the air, so the reheat condenser 7 is always closed, and the reheat condenser 7 is closed by closing the reheat expansion valve 12, and the operation is simple and flexible. The liquid refrigerant with low pressure and low temperature flows into the condenser 18, the axial flow fan 17 discharges the cold energy to the outdoor, as shown in fig. 2, the refrigerant passing through the condenser 18 flows into the compressor 14 through the four-way valve 15 for compression, the refrigerant is changed into a high-temperature and high-pressure gaseous refrigerant and passes through the oil separator 19, and then flows out to the evaporator 6 through the four-way valve 15, the evaporator 6 dissipates heat to the air, so that the air entering from the air inlet is heated, and the heated air is added to the designated humidity through the humidifier 8, so that the indoor temperature and humidity are proper. The high-temperature high-pressure gaseous refrigerant passing through the evaporator 6 is phase-changed into a high-pressure normal-temperature liquid refrigerant, and finally flows to the outdoor expansion valve 16 through the one-way valve connected with the main expansion valve 13 in parallel, and is depressurized to be changed into a low-temperature low-pressure liquid refrigerant which flows to the condenser 18 to take away cold.

The heating and humidifying treatment of the air is realized by the reciprocating way.

Because the outdoor expansion valve 16 is disposed at a side close to the condenser 18, the liquid refrigerant phase-changed to a low-pressure low-temperature state at this time quickly enters the condenser 18 to absorb heat, so that the influence of the low-pressure low-temperature liquid refrigerant on the pipeline can be reduced, and the service life can be prolonged.

The regulation of different temperatures is realized by regulating the power of the compressor.

The humidifier 8 may be an ultrasonic humidifier, a wet film humidifier or other humidification device.

And (3) ventilation mode: in the indoor working environment which only needs ventilation, only the fan 10 needs to be started, and air passes through the filtering component and the ultraviolet lamp 9 in sequence to be purified, so that ventilation is completed.

Intelligent mode: the intelligent adjustment is carried out through the indoor air environment, the controller arranged on the humidity adjusting unit and the temperature sensors, the temperature and humidity sensors and the pressure sensors on all the nodes.

Claims

1. The utility model provides a single cold heat source fresh air humidifying unit, characterized by, includes indoor set and off-premises station, the indoor set is including air intake, filter screen subassembly, evaporimeter (6), reheat condenser (7), humidifier (8), fan (10) and air outlet (11) that set gradually, the off-premises station includes cross valve (15) and constitutes compressor (14), condenser (18) and outdoor expansion valve (16) in return circuit with evaporimeter (6), compressor (14) and condenser (18) all are connected with cross valve (15), are provided with the radiator on condenser (18), reheat condenser (7) are parallelly connected through pipeline and condenser (18), and reheat condenser (7) are close to and are provided with reheat expansion valve (12) on evaporimeter (6) place pipeline.

2. The single cold heat source fresh air humidity conditioning unit as claimed in claim 1, wherein a main expansion valve (13) is disposed between the evaporator (6) and the condenser (18) and on a side close to the evaporator (6), the main expansion valve (13) is selectively used with an outdoor expansion valve (16), the main expansion valve (13) is connected in parallel with a check valve facing the condenser (18), and the outdoor expansion valve (16) is connected in parallel with a check valve facing the evaporator (6).

3. The single cold heat source fresh air humidity conditioning unit as claimed in claim 2, wherein the condenser (18) and the reheat condenser (7) are provided with filters on the side pipelines close to the evaporator (6).

4. The single cold heat source fresh air humidity conditioning unit as recited in claim 1, wherein the air inlet comprises a return air valve (1) communicated with indoor air and a fresh air valve (2) communicated with outdoor air.

5. The single cold heat source fresh air humidity conditioning unit as claimed in claim 1, wherein an ultraviolet lamp (9) is further arranged between the humidifier (8) and the fan (10).

6. The single cold heat source fresh air humidity conditioning unit as recited in claim 1, wherein the fan (10) is a centrifugal fan.

7. The single cold heat source fresh air humidity control unit as claimed in claim 1, wherein the radiator is an axial flow fan (17).

8. The fresh air humidity control unit with a single cold heat source as claimed in claim 1, wherein the filter screen assembly comprises a primary filter (3), a medium-efficiency filter (4) and a high-efficiency filter (5) which are arranged in sequence.

9. The single cold heat source fresh air humidity conditioning unit as claimed in claim 8, wherein the primary filter (3) and the high efficiency filter (5) are provided with air pressure difference switches.

10. The single cold and heat source fresh air humidity conditioning unit as recited in claim 1, further comprising a control system, wherein the control system comprises a controller, and a temperature sensor, a temperature and humidity sensor and a pressure sensor electrically connected with the controller, the temperature sensor is disposed between the evaporator (6) and the reheat condenser (7), the temperature and humidity sensor is disposed on the air inlet and the air outlet (11), the pressure sensor is disposed on the air suction and exhaust pipeline of the compressor (14), and the controller is further electrically connected with the compressor (14), the fan (10) and the radiator.