Internal environment temperature control device for air conditioning unit

Abstract

The internal environment temperature control device for the air conditioning unit comprises a temperature control noise reduction chamber and a temperature control system, the temperature control noise reduction chamber is used for containing the air conditioning unit, the temperature control noise reduction chamber comprises a shell, a sound insulation material layer, a sound absorption material layer and a radiation refrigeration material layer, and the temperature control system mainly comprises heat exchange equipment, an electromagnetic valve and a temperature sensor. The first temperature control effect of the working environment of the air conditioning unit and the noise reduction effect of the air conditioning unit are achieved through the temperature control noise reduction chamber, and the second temperature control effect of the space where the air conditioning unit is located in the temperature control noise reduction chamber is achieved through the temperature control system. Normal operation of the air conditioning unit is guaranteed, the service life of each part of the air conditioning unit is prolonged, and meanwhile operation noise of the air conditioning unit is reduced to a certain degree.

Description

Technical Field

[0001] The utility model belongs to the field of air conditioners and heat pumps, and particularly relates to an internal environment temperature control device for an air conditioner unit. Background Art

[0002] The rooftop air conditioner unit is placed on the top platform of a building, such as a rooftop or other applicable occasions, including single-cooling and heat pump devices such as air-cooled chilled water units, water-cooled chilled water units, and heat source tower chilled water units, providing a comfortable environment for people's work and life.

[0003] During the use of the rooftop air conditioner unit, components such as its internal compressor, electrical components, and condenser will emit a large amount of heat into the space inside the housing, and its internal evaporator component will emit cold into the space inside the housing. In summer, when the surrounding environmental temperature is high, combined with factors such as heat dissipation from operating components, it will lead to problems such as an internal high-temperature environment that is not suitable for its operation or startup, and a reduction in the service life of components; in winter, when the surrounding environmental temperature is low, combined with factors such as cold dissipation from operating components, it will lead to problems such as an internal low-temperature environment that is not suitable for its operation or startup, and a reduction in the service life of components. In addition, during the use of the rooftop air conditioner unit, due to components such as its internal compressor, it will also cause noise pollution problems. Other non-rooftop air conditioner units will also more or less have the above similar problems during use, which urgently need to be solved. Summary of the Utility Model

[0004] To solve the above technical problems, the utility model provides an internal environment temperature control device for an air conditioner unit to achieve temperature control of the working environment where the air conditioner unit is located, ensure the normal operation of the air conditioner unit, extend the service life of each component of the air conditioner unit, and reduce the operating noise of the air conditioner unit to a certain extent.

[0005] The technical solution provided by the utility model is specifically as follows:

[0006] An internal environment temperature control device for an air conditioner unit includes a temperature control and noise reduction chamber for placing the air conditioner unit, reducing the indoor environmental temperature, and reducing the operating noise of the air conditioner unit, and a temperature control system for adjusting the environmental temperature inside the temperature control and noise reduction chamber; the temperature control and noise reduction chamber includes a housing, a sound insulation material layer and a sound absorption material layer closely arranged on the inner surface layer of the housing, and a radiation cooling material layer arranged on the outer surface layer of the housing; the temperature control system includes an electric control cabinet, heat exchange equipment respectively connected to the evaporator and condenser of the air conditioner unit, and a temperature sensor arranged inside the temperature control and noise reduction chamber and connected to the electric control cabinet, and also includes electromagnetic valves respectively arranged on the connecting pipelines between the heat exchange equipment and the evaporator and condenser and connected to the electric control cabinet.

[0007] Further, the radiation cooling material layer includes a first radiation cooling material SiO located in the upper layer 2The fiber membrane and the second radiative cooling material, poly(N-isopropylacrylamide) thermosensitive gel, located in the lower layer.

[0008] Furthermore, the outer shell is made of galvanized sheet material, the sound insulation material layer is made of PVC (polyvinyl chloride) damping sound insulation material, and the sound absorption material layer is made of PU (polyurethane) sound absorption material.

[0009] Furthermore, after the water outlet of the evaporator and the water outlet of the condenser are connected through branch pipes and converge into a main pipe, they are connected to the water inlet of the heat exchange equipment; the water outlet of the heat exchange equipment is divided into branch pipes through the main pipe and then respectively connected to the water inlet of the evaporator and the water inlet of the condenser. Solenoid valves are respectively arranged on the branch pipes of the water outlet of the evaporator and the branch pipes of the water outlet of the condenser.

[0010] Furthermore, the top and bottom of the temperature control and noise reduction chamber are sealed. A number of ventilation and heat exchange holes are opened on the outer shell, the sound insulation material layer and the sound absorption material layer around the temperature control and noise reduction chamber, and an inclined cover for blocking the output of noise is arranged above the ventilation and heat exchange holes.

[0011] Preferably, the thickness of the sound insulation material layer is 1.5 mm, and the thickness of the sound absorption material layer is 20 mm.

[0012] Preferably, the heat exchange equipment is a fan coil unit and is arranged near the compressor of the air conditioning unit.

[0013] Preferably, the sound insulation material layer is closely attached to the inner surface layer of the outer shell of the temperature control and noise reduction chamber, and the sound absorption material layer is closely attached to the sound insulation material layer.

[0014] Compared with the prior art, the utility model has at least the following beneficial effects:

[0015] 1. In the utility model, the first temperature control and noise reduction chamber uses a radiative cooling material to achieve radiative cooling, continuously obtains cold energy, reduces the internal environment temperature of the rooftop air conditioning unit, and can adaptively adjust the amount of cold energy obtained according to the level of the external environment temperature to a certain extent, achieving a reduction in the internal environment temperature of the unit in a high-temperature environment in summer, and a slight or zero reduction in the internal environment temperature of the unit in a low-temperature environment in winter.

[0016] 2. The utility model uses the sound insulation and sound absorption materials in the built-in noise reduction chamber and the fully sealed plus partially opened hole mode, and uses sheet metal to firmly adhere to the sound insulation material, which not only maintains the flow and ventilation of the internal air to a certain extent, but also effectively reduces the noise of the unit.

[0017] 3. The utility model utilizes a temperature control system to set the temperature control deviation value and the target value, and compares the measured value, deviation value and target value of the internal environment temperature of the unit, so as to realize the adjustment of the heat exchange between the chilled water and cooling water of the unit and the internal air of the unit respectively, achieving the purpose of cooling the working environment of the unit in summer when the external environmental temperature is relatively high and heating the working environment of the unit in winter when the external environmental temperature is relatively low. Thus, fundamentally, the unit and its components are in a suitable temperature operating environment, ensuring the stable and reliable operation of the unit and extending the actual service life of each component of the air-conditioning unit. Brief Description of the Drawings

[0018] The drawings are used to assist in the further understanding of the present utility model and form a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model and do not constitute a limitation to the present utility model.

[0019] Figure 1 It is a schematic structural diagram of a temperature control device provided by an embodiment of the present utility model.

[0020] Among them, each reference numeral represents:

[0021] 1 - Temperature control and noise reduction chamber; 2 - Outer shell; 3 - Sound insulation material layer; 4 - Sound absorption material layer; 5 - Temperature sensor; 6 - Radiative cooling material layer; 7 - Evaporator; 8 - First water outlet; 9 - First water inlet; 10 - Air-conditioning unit; 11 - Bottom channel steel; 12 - Second water inlet; 13 - Second water outlet; 14 - Radiative cooling material layer; 15 - Third water outlet; 16 - Third water inlet; 17 - First solenoid valve; 18 - Heat exchange equipment; 19 - Electric control cabinet; 20 - Temperature control system; 21 - Condenser; 22 - Second solenoid valve; 23 - Support member. Detailed Embodiment

[0022] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present utility model.

[0023] As Figure 1As shown in the figure, this embodiment provides an internal environment temperature control device for an air-conditioning unit, which mainly includes a temperature control and noise reduction chamber 1, an air-conditioning unit 10 and a temperature control system 20 located in the temperature control and noise reduction chamber 1. The temperature control and noise reduction chamber 1 includes a housing 2, a sound insulation material layer 3 and a sound absorption material layer 4 laid close to the inner surface layer of the housing 2, and a radiation cooling material layer 6, 14 provided on the outer surface layer of the housing 2. The temperature control system 20 mainly includes a heat exchange device 18, a first solenoid valve 17, a second solenoid valve 22, a temperature sensor 5 and an electric control cabinet 19.

[0024] The air-conditioning unit 10 is located in the space formed by the temperature control and noise reduction chamber 1 and the bottom channel steel 11, and includes an evaporator 7, a condenser 21 and a compressor 22. The compressor 22 is a screw compressor or a device with similar functions. The condenser 21 is a shell-and-tube heat exchanger or a device with similar functions. The electric control cabinet 19 is placed on the condenser 21 or other components with reasonable structures. The compressor 22 is placed on the evaporator 7 or other components with reasonable structures through a support member 23.

[0025] The evaporator 7 includes a first water inlet 9 and a first water outlet 8. The condenser 21 includes a second water inlet 12 and a second water outlet 13. The heat exchange device 18 includes a third water inlet 16 and a third water outlet 15. After the water outlets of the evaporator 7 and the condenser 21 are connected by branch pipes and converge into a main pipe, they are connected to the water inlet of the heat exchange device 18. A first solenoid valve 17 and a second solenoid valve 22 are respectively arranged on the water outlet pipes of the evaporator 7 and the condenser 21. The water outlet of the heat exchange device 18 is divided into branch pipes through the main pipe and is respectively connected to the water inlet of the evaporator 7 and the condenser 21, forming a closed cycle respectively. Chilled water or cooling water exchanges heat with the air inside the temperature control and noise reduction chamber to achieve the purpose of cooling or heating the indoor air, especially the air near the compressor.

[0026] The top and bottom of the temperature control and noise reduction chamber are sealed, and through holes are opened in the surrounding outer shell and the sound insulation and sound absorption material layers. There can be a small number of holes or multiple holes, and the size of each hole is 2 mm wide and 8 mm long. The upper and lower openings of the opposite outer shell and the sound insulation and sound absorption layers are staggered. An inclined cover is arranged above the openings of the temperature control and noise reduction chamber to reduce the external output of noise while ensuring ventilation and heat exchange.

[0027] The sound absorption material layer uses PU polyurethane sound absorption material, but is not limited to this material, and can also be a material with similar sound absorption and noise reduction functions. The thickness of the sound absorption material layer is 20 mm, but is not limited to this thickness value, and can also be other thicknesses that meet the requirements. The sound insulation material layer uses PVC polyvinyl chloride damping sound insulation material, but is not limited to this material, and can also be a material with similar sound insulation and noise reduction functions. The thickness of the sound insulation material layer is 1.5 mm, but is not limited to this thickness value, and can also be other thicknesses that meet the requirements. The housing 2 uses galvanized sheet material or a material with similar functions.

[0028] The radiative cooling material layers 6 and 14 are composed of radiative cooling materials. Radiative cooling material is a passive cooling technology that uses thermal radiation to achieve temperature reduction. Compared with the active cooling technology based on compressors, it has no energy consumption and no greenhouse gas emissions. By covering a spectral selective material with an enhancement effect in a closed area, it releases heat in the form of thermal radiation into the low-temperature outer space of the universe, thereby achieving the purpose of temperature reduction. In this embodiment, a double-layer structure spectral self-adaptive radiative cooling material is used, which is composed of an upper first radiative cooling material SiO 2 fiber membrane and a lower second radiative cooling material poly-N-isopropylacrylamide PNIPAM thermosensitive gel, which is used to regulate the mid-infrared emissivity outside the 8-13 μm band, so as to achieve a relatively high broadband emissivity in a high-temperature environment and a relatively high selective emissivity in a medium- and low-temperature environment, so as to achieve the effect of self-adaptive radiative cooling.

[0029] In this embodiment, the first temperature control effect of the working environment of the air conditioner unit 10 and the noise reduction effect of the air conditioner unit 10 are realized through the temperature control and noise reduction chamber 1; the second temperature control effect of the space where the air conditioner unit 10 is located in the temperature control and noise reduction chamber is realized through the temperature control system 20, that is, by comparing the ambient temperature Th in the temperature control and noise reduction chamber with the target temperature Tm, to control the on-off of the first solenoid valve and the second solenoid valve and the start and stop of the heat exchange device. When the ambient temperature Th ≥ the target temperature Tm + the temperature deviation dT1, the first solenoid valve 17 closes, the second solenoid valve 22 disconnects, and the heat exchange device 18 starts; when the ambient temperature Th ≤ the target temperature Tm - the temperature deviation dT2, the first solenoid valve 17 disconnects, the second solenoid valve 22 closes, and the heat exchange device 18 starts; when the target temperature Tm - the temperature deviation dT2 ≤ the ambient temperature Th ≤ the target temperature Tm + the temperature deviation dT1, the heat exchange device 18 stops, the first solenoid valve 17 disconnects, and the second solenoid valve 22 disconnects.

[0030] The value of the ambient temperature Th comes from the measured value of the temperature sensor, but it is not limited to this solution, and other similar functions that can meet the requirements are also possible; the default value of Tm is 45 °C, the default value of dT1 is 10 °C, and the default value of dT2 is 30 °C, but it is not limited to this solution, and other similar functions that can meet the requirements are also possible.

[0031] When the air conditioner unit is turned on, the temperature sensor starts to detect the indoor temperature for temperature control and noise reduction and begins to control. When the ambient temperature Th ≥ target temperature Tm + temperature deviation dT1, the first solenoid valve closes and the second solenoid valve opens, the chilled water flows, and the cooling water stops flowing. After a delay of 30 seconds (this time can be set), the heat exchange equipment starts and cools; when the ambient temperature Th ≤ target temperature Tm - temperature deviation dT2, the first solenoid valve opens and the second solenoid valve closes, the chilled water stops flowing, and the cooling water flows. After a delay of 30 seconds (this time can be set), the heat exchange equipment starts and heats; when the target temperature Tm - temperature deviation dT2 ≤ ambient temperature Th ≤ target temperature Tm + temperature deviation dT1, the heat exchange equipment stops. After a delay of 5 minutes (this time can be set), the first solenoid valve opens and the second solenoid valve 22 opens, the chilled water stops flowing, and the cooling water stops flowing.

[0032] In addition, it should be noted that:

[0033] The compressor in this embodiment is a screw type, but it is not limited to the screw type and can also be a scroll type, piston type or equipment with similar functions; the condenser is a shell-and-tube heat exchanger, but it is not limited to the shell-and-tube type and can also be a finned type, double-pipe type, plate type or equipment with similar functions; the electric control cabinet is placed on the condenser, but it is not limited to this placement method and can also be placed on other components with reasonable structures; the compressor is placed on the evaporator, but it is not limited to this placement method and can also be placed on other components with reasonable structures.

[0034] The first water inlet is a water inlet, but it is not limited to the water inlet and can also be a water outlet; the second water outlet is a water outlet, but it is not limited to the water outlet and can also be a water inlet; the second water inlet is a water inlet, but it is not limited to the water inlet and can also be a water outlet; the second water outlet is a water outlet, but it is not limited to the water outlet and can also be a water inlet; the third water inlet is a water inlet, but it is not limited to the water inlet and can also be a water outlet; the third water outlet is a water outlet, but it is not limited to the water outlet and can also be a water inlet; the first water inlet and the first water outlet are locked and are each other's inlet and outlet; the second water inlet and the second water outlet are locked and are each other's inlet and outlet; the third water inlet and the third water outlet are locked and are each other's inlet and outlet.

[0035] The top of the temperature control and noise reduction chamber is closed, and there is no other device above the outer surface of the top, but it is not limited to this solution. The top of the temperature control and noise reduction chamber can also be non-closed, and other devices or equipment can be connected above the outer surface of the top; the temperature control and noise reduction chamber is in a fully sealed plus partially open-hole mode, not limited to this solution, and can also be in a fully sealed non-open-hole mode or other similar functional modes that can meet the requirements.

[0036] The connecting pipe between the evaporator and the heat exchange device is introduced and led out from the middle position of the inlet and outlet of the evaporator, protruding from the inner pipe wall and approaching the center position of the circular cross-section of the inlet and outlet pipes. However, this solution is not limited, and other solutions with similar functions and meeting requirements are also possible. Similarly, the connecting pipe between the condenser and the heat exchange device is introduced and led out from the middle position of the inlet and outlet of the condenser, protruding from the inner pipe wall and approaching the center position of the circular cross-section of the inlet and outlet pipes. However, this solution is not limited, and other solutions with similar functions and meeting requirements are also possible.

[0037] The heat exchange device is a fan coil unit, but this device is not limited, and other devices with similar functions and meeting requirements are also possible. In this embodiment, the heat exchange device is placed at a position above the middle and close to the compressor inside the temperature control and noise reduction chamber, which is more conducive to cooling the ambient air around the compressor. However, this placement method is not limited, and other solutions with similar functions and meeting requirements are also possible. The air outlet of the heat exchange device is directly placed inside the temperature control and noise reduction chamber, and the treated air is directly blown towards the environment inside the temperature control and noise reduction chamber. However, this method is not limited, and it is also possible to have a duct with openings connected to the air outlet of the heat exchange device and the inside of the temperature control and noise reduction chamber to introduce the air into the temperature control and noise reduction chamber, so as to more effectively regulate the ambient temperature inside the temperature control and noise reduction chamber. Other solutions with similar functions and meeting requirements are also possible.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; under the idea of the present invention, the technical features between the above embodiments or different embodiments can also be combined, and there are many other variations in different aspects of the present invention as described above. For the sake of simplicity, they are not provided in detail; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An internal environment temperature control device for an air conditioning unit, characterized in that: It includes a temperature-controlled noise reduction room for placing an air-conditioning unit, reducing the indoor ambient temperature and reducing the operating noise of the air-conditioning unit, and a temperature control system for adjusting the indoor ambient temperature of the temperature-controlled noise reduction room; the temperature-controlled noise reduction room includes an outer shell and a sound insulation material layer and a sound absorption material layer arranged close to the inner surface of the outer shell, and a radiation refrigeration material layer arranged on the outer surface of the outer shell; the temperature control system includes an electric control cabinet, a heat exchange device respectively connected to the evaporator and condenser of the air-conditioning unit, and a temperature sensor arranged in the temperature-controlled noise reduction room and connected to the electric control cabinet, and also includes solenoid valves connected to the electric control cabinet and arranged on the connecting pipes between the heat exchange device and the evaporator and the condenser.

2. The internal environment temperature control device for an air conditioning unit according to claim 1, characterized in that: The radiation cooling material layer includes a first radiation cooling material SiO2 fiber membrane located in the upper layer and a second radiation cooling material poly (N-isopropylacrylamide) thermosensitive gel located in the lower layer.

3. The internal environment temperature control device for an air conditioning unit according to claim 1, characterized in that: The shell is made of galvanized sheet material, the sound insulation material layer is made of PVC polyvinyl chloride damping sound insulation material, and the sound absorption material layer is made of PU polyurethane sound absorption material.

4. The internal environment temperature control device for an air conditioning unit according to claim 1, characterized in that: The water outlet of the evaporator and the water outlet of the condenser are connected through branch pipes to merge into a main pipe, and then connected to the water inlet of the heat exchange device; the water outlet of the heat exchange device is divided into branch pipes through the main pipe and respectively connected to the water inlet of the evaporator and the water inlet of the condenser, and solenoid valves are respectively provided on the branch pipes of the evaporator water outlet and the branch pipes of the condenser water outlet.

5. The internal environment temperature control device for an air conditioning unit according to claim 1, characterized in that: The top and bottom of the temperature control and noise reduction chamber are sealed, a plurality of ventilation and heat exchange holes are opened on the outer shell, the sound insulation material layer and the sound absorption material layer around the temperature control and noise reduction chamber, and an inclined cover for blocking noise output is arranged above the ventilation and heat exchange holes.

6. The internal environment temperature control device for an air conditioning unit according to claim 1, characterized in that: The thickness of the sound insulation material layer is 1.5 mm, and the thickness of the sound absorption material layer is 20 mm.

7. The internal environment temperature control device for an air conditioning unit according to claim 1, characterized in that: The heat exchange device is a fan coil unit and is arranged near the compressor of the air conditioning unit.

8. The internal environment temperature control device for an air conditioning unit according to claim 1, characterized in that: The sound insulation material layer is in close contact with the inner surface of the temperature control and noise reduction chamber shell, and the sound absorption material layer is in close contact with the sound insulation material layer.

Images