Full heat fresh air exchange equipment with isothermal or heating dehumidification function

Abstract

A full-heat fresh air exchange device with isothermal or warming dehumidification function, comprises an outdoor unit and an indoor unit connected by copper pipes, characterized in that the outdoor unit is provided with a compressor, a four-way valve, an outdoor fan, an outdoor condenser and an outdoor electronic expansion valve, and the indoor unit is provided with a reheat condenser, an indoor evaporator, an indoor fan, a one-way valve, a dehumidification throttling device, a solenoid valve, a stop valve, an exhaust fan, a full-heat exchange core, an air filter and a controller, the left and right side casings of the indoor unit are respectively provided with an exhaust outlet, a fresh air inlet and a fresh air outlet, the front side casing of the indoor unit is provided with an exhaust inlet and a circulating air inlet, the refrigerant outlet temperature of the outdoor condenser is controlled by the controller to control the heat dissipation ratio of the outdoor condenser and the indoor reheat condenser, so as to control the indoor air outlet temperature to be higher than or equal to the return air temperature, achieve the isothermal or warming effect, and provide a living environment with suitable temperature and humidity.

Description

Technical Field

[0001] The invention relates to a full-heat fresh air exchange device with isothermal or temperature-raising dehumidification function, belonging to indoor air quality regulating equipment. Background Art

[0002] With the continuous improvement of people's living standards, the quality of indoor environment has been paid more and more attention by people. Maintaining good indoor air plays an important role in human health. At present, the equipment for regulating indoor air is mainly air conditioners and fresh air exchangers. The main function of fresh air exchangers is to adjust the air conditions of people's living and working places, and make full use of the energy (heat energy or cold energy) in the stale air to be replaced, and reduce energy consumption as much as possible while ventilating, so as to achieve the purpose of energy saving and environmental protection. Traditional air conditioning dehumidification cools the air through the air conditioning evaporator to condense the moisture in the air, but the room temperature will also drop during dehumidification. It belongs to cooling dehumidification. Only one of the temperature and humidity indicators can be met, and the comfort is not high. Therefore, it is increasingly necessary to control the indoor temperature and humidity within a reasonable range, especially for coastal areas. During the transition season, the humidity is high and the temperature is relatively comfortable. Isothermal dehumidification equipment is particularly necessary. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art and to provide a full-heat fresh air exchange device with isothermal or warming dehumidification function which achieves the purpose of isothermal or warming dehumidification and exchange by cooling the indoor environment (air) and reheating the air.

[0004] The technical scheme of the full heat fresh air exchange device with isothermal or heating dehumidification function of the present invention is: it includes an outdoor unit and an indoor unit connected by copper pipes, and is characterized in that the outdoor unit is provided with a compressor, a four-way valve, an outdoor fan, an outdoor condenser and an outdoor electronic expansion valve, and the indoor unit is provided with a reheat condenser, an indoor evaporator, an indoor fan, a one-way valve, a dehumidification throttling device, a solenoid valve, a stop valve, an exhaust fan, a full heat exchange core, an air filter and a controller, and the left and right side casings of the indoor unit are respectively provided with an exhaust outlet, a fresh air inlet and a fresh air outlet, and the front side casing of the indoor unit is provided with an exhaust inlet and a circulating air inlet.

[0005] During refrigeration: the compressor is turned on, and the high-temperature and high-pressure refrigerant enters the outdoor condenser through the four-way valve, is cooled by the outdoor condenser, and then throttles and reduces the pressure through the outdoor electronic expansion valve. Then the solenoid valve opens and enters the indoor evaporator. The indoor evaporator absorbs the heat of the air and returns to the compressor to complete the normal refrigeration cycle. When the solenoid valve is opened, the inlet and outlet pressures of the reheat condenser are equal, so there is no refrigerant flowing in the reheat condenser;

[0006] During dehumidification: the compressor is turned on, and the high-temperature and high-pressure refrigerant enters the outdoor condenser through the four-way valve, partially cools down through the outdoor condenser, and then passes through the outdoor electronic expansion valve. At this time, the outdoor electronic expansion valve is fully open, and the solenoid valve is closed. The refrigerant enters the reheat condenser to continue to dissipate heat and heat the low-temperature and low-humidity air, and then enters the indoor evaporator through the dehumidification throttling device to evaporate. After evaporation, the refrigerant returns to the compressor to complete the dehumidification refrigeration cycle;

[0007] During heating: the compressor is turned on, the indoor solenoid valve is closed, and the high-temperature and high-pressure refrigerant enters the indoor evaporator through the four-way valve. After the refrigerant is cooled, it continues to be cooled through the one-way valve and the reheat condenser, and then throttles and reduces the pressure through the outdoor electronic expansion valve. After evaporation, it returns to the compressor to complete the heating cycle.

[0008] The full-heat fresh air exchange device with isothermal or warming dehumidification function of the present invention comprises an indoor unit and an outdoor unit. When the indoor unit runs in the dehumidification mode, the compressor is turned on, and the refrigerant enters the outdoor condenser after passing through the four-way valve to dissipate part of the heat. The outdoor fan determines whether to turn on and the operating speed after turning on according to the condensation temperature. The outdoor electronic expansion valve is fully opened, and the solenoid valve is closed. The high-temperature and high-pressure refrigerant continues to dissipate heat through the reheat condenser, and then enters the indoor evaporator for evaporation through the dehumidification throttling device. Under the power of the indoor fan, the indoor air flows through the indoor evaporator. The refrigerant in the indoor evaporator absorbs the heat in the room air and then returns to the compressor to complete a dehumidification cycle. During the cycle, the outdoor condenser and the reheat condenser together constitute a condenser. Part of the heat dissipated by the condenser is used to heat the low-temperature and low-humidity air cooled by the indoor evaporator. The refrigerant outlet temperature of the outdoor condenser is controlled by a controller to control the heat dissipation ratio of the outdoor condenser and the indoor reheat condenser, thereby achieving the control of the indoor air outlet temperature to be higher than or equal to the return air temperature, achieving the isothermal or warming effect, and providing a living environment with suitable temperature and humidity.

[0009] The full heat fresh air exchange device with isothermal or warming dehumidification function of the present invention can close the fresh air exchange function or open the fresh air exchange function while dehumidifying. After the fresh air exchange function is turned on, the fresh air passes through the fresh air inlet and the air valve, and then exchanges heat with the exhaust air entering from the exhaust air inlet in the full heat exchange core, and then mixes with the circulating air entering from the circulating air inlet, passes through the air filter, flows through the evaporator, is cooled and dehumidified, and becomes low-temperature and low-humidity air, flows through the reheat condenser, and the air temperature is heated by the reheat condenser isothermally, so that the indoor air outlet temperature is higher than or equal to the return air temperature, achieving the effect of isothermal or warming. The exhaust outlet and the fresh air inlet are each provided with an air valve, and the air valve can control the air volume and adjust the wind speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1It is a schematic diagram of the assembly of the full-heat fresh air exchange device with isothermal or heating dehumidification function of the present invention;

[0011] Figure 2 It is a schematic diagram of the refrigeration principle of the present invention;

[0012] Figure 3 It is a schematic diagram of the dehumidification principle of the present invention;

[0013] Figure 4 It is a schematic diagram of the heating principle of the present invention;

[0014] Figure 5 It is a schematic diagram of air flow of the indoor unit of the present invention. DETAILED DESCRIPTION

[0015] The present invention relates to a full-heat fresh air exchange device with isothermal or heating dehumidification function, such as Figure 1 — Figure 5 As shown, it includes an outdoor unit and an indoor unit connected by a copper tube 23, wherein the outdoor unit is provided with a compressor 1, a four-way valve 2, an outdoor fan 3, an outdoor condenser 4 and an outdoor electronic expansion valve 12, and the indoor unit is provided with a reheat condenser 5, an indoor evaporator 6, an indoor fan 7, a one-way valve 8, a dehumidification throttling device 9, a solenoid valve 10, a stop valve 11, an exhaust fan 13, a full heat exchange core 15, an air filter 20 and a controller 21, and an exhaust outlet 14, a fresh air inlet 17 and a fresh air outlet 22 are respectively provided on the left and right side casings of the indoor unit, and an exhaust inlet 18 and a circulating air inlet 19 are provided on the front casing of the indoor unit.

[0016] During refrigeration: the compressor 1 is turned on, and the high-temperature and high-pressure refrigerant enters the outdoor condenser 4 through the four-way valve 2, is cooled by the outdoor condenser 4, and then is throttled and depressurized by the outdoor electronic expansion valve 12, and then the solenoid valve 10 is opened, and enters the indoor evaporator 6. The indoor evaporator 6 absorbs the heat of the air and then returns to the compressor 1, completing the normal refrigeration cycle. When the solenoid valve 10 is opened, the inlet and outlet pressures of the reheat condenser 5 are equal, so no refrigerant flows in the reheat condenser 5;

[0017] During dehumidification: the compressor 1 is turned on, and the high-temperature and high-pressure refrigerant enters the outdoor condenser 4 through the four-way valve 2, partially cools down through the outdoor condenser 4, and then passes through the outdoor electronic expansion valve 12. At this time, the outdoor electronic expansion valve 12 is fully opened, and the solenoid valve 10 is closed. The refrigerant enters the reheat condenser 5 to continue to dissipate heat and heat the low-temperature and low-humidity air, and then enters the indoor evaporator 6 through the dehumidification throttling device 9 to evaporate. After the refrigerant evaporates, it returns to the compressor 1 to complete the dehumidification and refrigeration cycle;

[0018] During heating: the compressor 1 is turned on, the indoor solenoid valve 10 is closed, and the high-temperature and high-pressure refrigerant enters the indoor evaporator 6 through the four-way valve 2. After the refrigerant is cooled, it continues to be cooled through the one-way valve 8 and the reheat condenser 5, and then throttled and reduced in pressure by the outdoor electronic expansion valve 12, enters the outdoor condenser 4 to evaporate, and then returns to the compressor 1 to complete the heating cycle.

[0019] The dehumidification throttling device 9 can use an electronic expansion valve or a throttling capillary tube. The indoor one-way valve is used for refrigerant circulation in the heating mode. The air reheat condenser and the evaporator together form a condenser, which increases the heat dissipation area of ​​the heat exchanger during heating and improves energy efficiency.

[0020] When the indoor unit is running in dehumidification mode, the compressor 1 is turned on, and the refrigerant enters the outdoor condenser 4 after passing through the four-way valve 2 to dissipate part of the heat. The outdoor fan 3 determines whether to turn on and the operating speed after turning on according to the condensation temperature. The outdoor electronic expansion valve 12 is fully opened, and the solenoid valve 10 is closed. The high-temperature and high-pressure refrigerant continues to dissipate heat through the reheat condenser 5, and then enters the indoor evaporator 6 for evaporation through the dehumidification throttling device 9. The indoor air flows through the indoor evaporator 6 under the power of the indoor fan 7. The refrigerant in the indoor evaporator 6 absorbs the heat in the room air and returns to the compressor 1 to complete a dehumidification cycle. During the cycle, the outdoor condenser 4 and the reheat condenser 5 together constitute a condenser. Part of the heat dissipated by the condenser is used to heat the low-temperature and low-humidity air cooled by the indoor evaporator 6. The refrigerant outlet temperature of the outdoor condenser 4 is controlled by the controller 21 to control the heat dissipation ratio of the outdoor condenser 4 and the indoor reheat condenser 5, so as to control the indoor air outlet temperature to be higher than or equal to the return air temperature, achieve isothermal or warming effects, and provide a living environment with suitable temperature and humidity.

[0021] During dehumidification, the fresh air exchange function can be turned off or on. After the fresh air exchange function is turned on, the fresh air passes through the fresh air inlet 17 and the air valve 16, and then exchanges heat with the exhaust air entering from the exhaust air inlet 18 in the full heat exchange core 15, and then mixes with the circulating air entering from the circulating air inlet 19. After passing through the air filter 20, it flows through the evaporator 6, is cooled and dehumidified, and becomes low-temperature and low-humidity air, and flows through the reheat condenser 5. The air temperature is heated by the reheat condenser 5, so that the indoor air outlet temperature is higher than or equal to the return air temperature, thereby achieving an isothermal or warming effect.

[0022] The exhaust outlet 14 and the fresh air inlet 17 are each provided with an air valve 16, which can control the air volume and adjust the wind speed.

Claims

1. A full-heat fresh air exchange device with isothermal or heating dehumidification function, comprising an outdoor unit and an indoor unit connected by a copper tube (23), characterized in that The outdoor unit is provided with a compressor (1), a four-way valve (2), an outdoor fan (3), an outdoor condenser (4) and an outdoor electronic expansion valve (12); the indoor unit is provided with a reheat condenser (5), an indoor evaporator (6), an indoor fan (7), a one-way valve (8), a dehumidification throttling device (9), a solenoid valve (10), a stop valve (11), an exhaust fan (13), a full heat exchange core (15), an air filter (20) and a controller (21); an exhaust outlet (14), a fresh air inlet (17) and a fresh air outlet (22) are respectively provided on the left and right side casings of the indoor unit; an exhaust inlet (18) and a circulating air inlet (19) are provided on the front casing of the indoor unit; During refrigeration: the compressor (1) is turned on, and the high-temperature and high-pressure refrigerant enters the outdoor condenser (4) through the four-way valve (2), is cooled by the outdoor condenser (4), and is throttled and reduced in pressure by the outdoor electronic expansion valve (12). Then, the solenoid valve (10) is opened, and the refrigerant enters the indoor evaporator (6). The indoor evaporator (6) absorbs the heat of the air and returns to the compressor (1), completing the normal refrigeration cycle. When the solenoid valve (10) is opened, the inlet and outlet pressures of the reheat condenser (5) are equal, so no refrigerant flows in the reheat condenser (5); During dehumidification: the compressor (1) is turned on, and the high-temperature and high-pressure refrigerant enters the outdoor condenser (4) through the four-way valve (2), is partially cooled by the outdoor condenser (4), and then passes through the outdoor electronic expansion valve (12). At this time, the outdoor electronic expansion valve (12) is fully opened, and the solenoid valve (10) is closed. The refrigerant enters the reheat condenser (5) to continue to dissipate heat and heat the low-temperature and low-humidity air, and then enters the indoor evaporator (6) through the dehumidification throttling device (9) to evaporate. After the refrigerant evaporates, it returns to the compressor (1), completing the dehumidification refrigeration cycle; During heating: the compressor (1) is turned on, the indoor solenoid valve (10) is closed, and the high-temperature and high-pressure refrigerant enters the indoor evaporator (6) through the four-way valve (2). After the refrigerant is cooled, it continues to cool through the one-way valve (8) and the reheat condenser (5), and then throttles and reduces the pressure through the outdoor electronic expansion valve (12). After evaporation, it returns to the compressor (1), completing the heating cycle. When the indoor unit runs in dehumidification mode, the compressor is turned on, and the refrigerant enters the outdoor condenser after passing through the four-way valve to dissipate part of the heat. The outdoor fan determines whether to turn on and the operating speed after turning on according to the condensing temperature. The outdoor electronic expansion valve is fully opened, and the solenoid valve is closed. The high-temperature and high-pressure refrigerant continues to dissipate heat through the reheat condenser, and then enters the indoor evaporator through the dehumidification throttling device to evaporate. Under the power of the indoor fan, the indoor air flows through the indoor evaporator. The refrigerant in the indoor evaporator absorbs the heat in the room air and returns to the compressor to complete a dehumidification cycle. During the cycle, the outdoor condenser and the reheat condenser together form a condenser. Part of the heat dissipated by the condenser is used to heat the low-temperature and low-humidity air cooled by the indoor evaporator. The refrigerant outlet temperature of the outdoor condenser is controlled by the controller to control the heat dissipation ratio of the outdoor condenser and the indoor reheat condenser.

2. The full-heat fresh air exchange device with isothermal or heating dehumidification function as claimed in claim 1 is characterized in that During dehumidification: after the fresh air passes through the fresh air inlet (17) and the air valve (16), it exchanges heat with the exhaust air entering from the exhaust air inlet (18) in the full heat exchange core (15), and then mixes with the circulating air entering from the circulating air inlet (19). After passing through the air filter (20), it flows through the evaporator (6), is cooled and dehumidified, and becomes low-temperature and low-humidity air. It flows through the reheat condenser (5), and the air temperature is raised by the reheat condenser (5) so that the indoor air outlet temperature is higher than or equal to the return air temperature.

3. The full-heat fresh air exchange device with isothermal or heating dehumidification function as claimed in claim 1 is characterized in that The exhaust air outlet (14) and the fresh air inlet (17) are each provided with an air valve (16).

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