Air source heat pump air conditioning system capable of indirectly recovering energy from exhaust air system

Abstract

The utility model discloses an air source heat pump air conditioning system of indirect recovery exhaust system energy, including air source heat pump unit, it has the air outlet on top wall and the air inlet on side wall, is provided with the exhaust pipe of the air inlet directly opposite it outside air source heat pump unit, the horizontal interval between exhaust pipe and the air inlet of air source heat pump unit is 800~1200mm, the end of exhaust pipe away from air source heat pump unit is communicated on building air shaft, is provided with the exhaust fan of the exhaust of air source heat pump unit direction on exhaust pipe, and the electric sealing valve between exhaust fan and building air shaft, is provided with the indoor air pipe of the indoor exhaust ventilation of building on building air shaft. The utility model has the advantages of efficient, reasonable recovery building indoor exhaust contains the energy, greatly improves the operation performance of air source heat pump unit, avoids the air of building indoor direct outward exhaust to the outside, leads to this part of energy to waste.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning and refrigeration technology, and in particular to an air source heat pump air conditioning system that indirectly recovers energy from the exhaust system. Background Technology

[0002] To meet the cooling or heating needs of indoor environments, some buildings are equipped with air-source heat pump air conditioning systems. Rooms with air-source heat pump air conditioning systems need to exhaust some air while receiving fresh air. Since the temperature and humidity of the exhaust air are basically the same as the air treated by the indoor air conditioning system, the exhaust air contains some energy. Directly discharging this energy into the outdoor air would result in a waste of this energy. Taking a typical air-source heat pump unit as an example, the air inlet temperature under standard operating conditions for cooling or heating is generally 35℃ and 7℃, respectively. When the cooling outlet water temperature is constant, as the inlet air temperature decreases, the unit's cooling capacity increases, the input power decreases, and therefore the coefficient of performance (COP) for cooling increases. When the heating outlet water temperature is constant, as the inlet air temperature increases, the unit's heating capacity increases, and the input power increases, but the increase in input power is less than the increase in heating capacity, thus the COP for heating increases. In summary, how to rationally recover exhaust air energy and apply it to air-source heat pump units is an important problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0003] The purpose of this utility model is to address the shortcomings of existing technologies by providing an air source heat pump air conditioning system that indirectly recovers energy from the exhaust system. This system achieves energy saving and consumption reduction by indirectly recovering and utilizing the energy from indoor exhaust.

[0004] To achieve the above objectives, the present invention can adopt the following technical solution:

[0005] The air source heat pump air conditioning system for indirect energy recovery of the exhaust system of this utility model includes an air source heat pump unit for regulating the indoor ambient temperature of a building. The air source heat pump unit has an air outlet on the top wall and an air inlet on the side wall. An exhaust duct is provided on the outside of the air source heat pump unit, directly opposite the air inlet. The horizontal distance between the exhaust duct and the air inlet of the air source heat pump unit is 800~1200mm. The end of the exhaust duct away from the air source heat pump unit is connected to the building ventilation shaft. An exhaust fan is provided on the exhaust duct to exhaust air towards the air source heat pump unit, and an electrically operated airtight valve is located between the exhaust fan and the building ventilation shaft. Indoor air ducts are arranged in the building ventilation shaft for exhaust and ventilation in the interior of the building.

[0006] Furthermore, a reinforced concrete foundation is provided below the air source heat pump unit and the exhaust fan to stably support and elevate the air source heat pump unit and the exhaust fan, preventing short circuits and damage caused by rainwater immersion in the air source heat pump unit and the exhaust fan located outdoors of the building during rainy days.

[0007] Furthermore, the indoor air duct is equipped with a single-layer louvered air outlet or a ceiling-mounted exhaust fan, which can be reasonably selected according to the actual situation.

[0008] Furthermore, a fire damper is installed at the end of the indoor air duct near the building's ventilation shaft to effectively prevent flames or smoke from spreading to other rooms along the indoor air duct and the building's ventilation shaft in the event of a fire.

[0009] Furthermore, for some buildings such as hospitals and wards that require sterilization, the indoor air must be filtered and sterilized before it can be discharged to the outside. Therefore, when encountering such an environment, it is necessary to install an inner lining duct that is sealed and connected to both the exhaust duct and the indoor duct in the building's ventilation shaft, and to install an air filter on the exhaust duct between the inner lining duct and the electric airtight valve to effectively prevent germs in the indoor air of the building from spreading to the outdoor environment.

[0010] The advantage of this utility model is that it integrates an air source heat pump unit and a circulating exhaust system, which can efficiently and rationally recover the energy contained in the indoor exhaust air of a building, reduce the air intake temperature of the air source heat pump unit when cooling or increase the air intake temperature of the air source heat pump unit when heating, thereby greatly improving the operating performance of the air source heat pump unit and avoiding the waste of energy caused by the direct exhaust of indoor air to the outside. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model.

[0012] Figure 2 yes Figure 1 A-direction view of the air source heat pump unit.

[0013] Figures 3-5 This is a schematic diagram of the ventilation layout inside the building. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] like Figure 1-4 As shown, the air source heat pump air conditioning system for indirectly recovering energy from the exhaust system according to this utility model includes an air source heat pump unit 1. The air source heat pump unit 1 has an air outlet 2 located on its top wall and an air inlet 3 located on its side wall. There can be multiple air inlets 3, which are evenly distributed on the four sides of the air source heat pump unit 1. The air source heat pump unit 1 is connected to the air conditioning water pipe main and the circulating water pump through its water inlet and outlet, and sends the air conditioning chilled water or hot water to the indoor air handling terminal equipment arranged in the building 100. Then, the indoor air handling terminal equipment blows cold air or hot air into the building 100 to achieve the purpose of regulating the ambient temperature of the building 100.

[0016] An exhaust duct 4 is installed on the outside of the air source heat pump unit 1. There can be multiple exhaust ducts 4, which should correspond one-to-one with the air inlets 3 on the air source heat pump unit 1. The air inlets of all exhaust ducts 4 are connected to the building ventilation shaft 200 away from the air source heat pump unit 1, while the air outlets are aligned with each air inlet 3 on the side wall of the air source heat pump unit 1. The air outlet of each exhaust duct 4 is kept at a horizontal distance of 800~1200mm from the corresponding air inlet 3. This satisfies the maintenance requirements and ensures that the air inlets 3 of the air source heat pump unit 1 can fully draw in the exhaust air from the exhaust duct 4.

[0017] Each exhaust duct 4 is equipped with an exhaust fan 5 that supplies air to the air source heat pump unit 1, and an electric airtight valve 6 is also installed on the exhaust duct 4 between the exhaust fan 5 and the building ventilation shaft 200.

[0018] In addition, an indoor air duct 7 for exhausting air from the building's interior 100 is also connected to the building's ventilation shaft 200. Multiple indoor air ducts 7 are arranged one-to-one within each of the building's interior 100. Single-layer louvered air vents 8 (such as...) are installed on the indoor air ducts 7. Figure 3 (as shown) or ceiling-mounted exhaust fan 9 (such as Figure 4 As shown), the specific selection of single-layer louvered air vent 8 and ceiling-mounted exhaust fan 9 can be reasonably chosen according to the actual situation. The single-layer louvered air vent 8 or ceiling-mounted exhaust fan 9 are used to connect the interior 100 of the building with the interior air duct 7. Then, through the interior air duct 7, the building air shaft 200, the exhaust duct 4 and the exhaust fan 5, a complete pipeline for indirect recovery of exhaust air is formed to realize the exhaust air exchange of the interior 100 of the building and blow the exhaust air of the interior 100 of the building directly into the air inlet 3 of the air source heat pump unit 1.

[0019] Since the exhaust air from the building's interior 100 has a similar temperature and humidity to the cold or hot air blown into the building's interior 100 by the indoor air handling unit, circulating the exhaust air from the building's interior 100 into the air source heat pump unit 1 can efficiently and rationally recover the energy contained in the exhaust air from the building's interior 100. This reduces the suction temperature of the air source heat pump unit 1 when cooling or increases the suction temperature of the air source heat pump unit 1 when heating, resulting in lower energy consumption when the air source heat pump unit 1 produces chilled or hot water for air conditioning. This greatly improves the operating performance of the air source heat pump unit 1 and avoids the direct exhaust of air from the building's interior 100 to the outside, which would otherwise waste this portion of energy.

[0020] Furthermore, to effectively prevent flames or smoke from spreading to other rooms via indoor ducts 7 and building ventilation shafts 200 in the event of a fire, fire dampers 10 capable of shutting off the pipes should be installed at the end of each indoor duct 7 near the building ventilation shaft 200, with a distance of less than 200mm between the fire damper 10 and the building ventilation shaft 200. To prevent rainwater from soaking the air source heat pump unit 1 and exhaust fan 5 during rainy weather, reinforced concrete foundations 11 should be installed on the ground below the locations of the air source heat pump unit 1 and exhaust fan 5 to stably support them. This also elevates the air source heat pump unit 1 and exhaust fan 5, effectively preventing short circuits and damage caused by rainwater soaking.

[0021] In addition, for indoor spaces such as hospitals and wards that require sterilization, the air must be filtered and sterilized before being exhausted. Therefore, when installing and arranging such environments, if... Figure 5 As shown, an inner lining duct 12 that is sealed and connected to both the exhaust duct 4 and the indoor duct 7 should also be installed inside the building ventilation shaft 200, and an air filter 13 should be installed on the exhaust duct 4 between the inner lining duct 12 and the electric airtight valve 6, so as to effectively prevent the spread of germs in the air of the building's indoor 100 to the outdoor environment.

[0022] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

Claims

1. An air-source heat pump air conditioning system that indirectly recovers energy from an exhaust system, comprising an air-source heat pump unit for regulating the indoor ambient temperature of a building, characterized in that: The air source heat pump unit has an air outlet on the top wall and an air inlet on the side wall. An exhaust duct is installed on the outside of the air source heat pump unit, directly opposite the air inlet. The horizontal distance between the exhaust duct and the air inlet of the air source heat pump unit is 800~1200mm. The end of the exhaust duct away from the air source heat pump unit is connected to the building ventilation shaft. An exhaust fan is installed on the exhaust duct to exhaust air towards the air source heat pump unit, and an electrically operated airtight valve is located between the exhaust fan and the building ventilation shaft. Indoor air ducts for exhaust and ventilation are installed on the building ventilation shaft.

2. The air source heat pump air conditioning system for indirectly recovering energy from the exhaust system according to claim 1, characterized in that: A reinforced concrete foundation is provided below the air source heat pump unit and the exhaust fan.

3. The air source heat pump air conditioning system for indirectly recovering energy from the exhaust system according to claim 1, characterized in that: The indoor air duct is equipped with a single-layer louvered air outlet or a ceiling-mounted exhaust fan.

4. The air source heat pump air conditioning system for indirectly recovering energy from the exhaust system according to claim 1, characterized in that: A fire damper is installed at the end of the indoor air duct near the building's ventilation shaft.

5. The air source heat pump air conditioning system for indirectly recovering energy from the exhaust system according to claim 1, characterized in that: An inner lining duct is installed inside the building's ventilation shaft, which is sealed and connected to both the exhaust duct and the indoor duct. An air filter is installed on the exhaust duct between the inner lining duct and the electric airtight valve.

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