CN105546875B - The integrated system of Air-Cooled Heat Pump Unit - Google Patents

Abstract

The invention belongs to the technical field of heat pumps, and specifically relates to an integrated system of an air-cooled heat pump unit, which includes a heat collection chamber and more than one air-cooled heat pump unit. The air inlet and the air inlet are equipped with air inlet louvers, the top of the heat collection chamber and the upper part around it are transparent plates, and the air outlets are set on the top of the heat collection chamber corresponding to the air guide channels of each air-cooled heat pump unit. In the present invention, by placing the air-cooled heat pump unit in the heat collection chamber, the heat from the outside can be collected in the heat collection chamber to ensure less frosting and fast defrosting in winter low-temperature haze weather, so that it can easily cope with low temperature, wind, snow, Haze weather can reduce energy loss and ensure efficient and stable operation of the system. At the same time, it can significantly prolong the service life of the air-cooled heat pump unit and ancillary equipment, and effectively reduce the operating noise of the unit.

Description

Integrated system of air-cooled heat pump units

technical field

The invention relates to an integrated system of an air-cooled heat pump unit, belonging to the technical field of heat pumps.

Background technique

Under the background that energy conservation and environmental protection have become the subject of worldwide attention, the field of HVAC is facing huge challenges. Strengthening energy resource conservation, ecological environment protection, and enhancing sustainable development are already related to the long-term development interests of the people and the country. In order to improve the efficiency of comprehensive utilization of energy, my country has promulgated energy-saving design standards for public buildings. The coal-based heating method is increasingly unable to meet the requirements of sustainable social development, reducing the total energy of heating, ventilation, air conditioning and lighting. Consumption becomes the current goal. About 2/3 of my country's land area belongs to severe cold and cold regions. According to statistics, in 2006, the total heating area in northern my country was about 15.5 billion square meters, and the total energy consumption for heating was about 278 million tons of standard coal, accounting for about 37% of the total energy consumption of buildings in my country. %. Using renewable energy such as solar energy and air energy for heating is an important direction in the field of HVAC, and it is also one of the research hotspots.

At present, the renewable energy sources that are widely used in HVAC projects mainly include solar energy, shallow surface thermal energy, and air thermal energy. When these renewable energy sources are applied in cold regions, they have different climate characteristics and utilization methods in cold regions. Some problems caused:

(1) The direct heating system using solar energy + heat collector + hot water storage tank in cold regions not only has the contradiction between economy and energy saving, but also it is difficult to guarantee the heating effect. Due to the large heat load of buildings in winter, the heating cycle is relatively long. If solar energy is fully used to achieve heating, not only a large enough heat collection area and heat storage device are required, but also limited by weather conditions; the large heat collection area will lead to the initial investment of the project. Large, poor economy, and if there is an increase in smog and rainy weather in recent years, and the temperature drops sharply by more than ten degrees, the heating system will be paralyzed.

(2) Although the heating effect of the system directly supplied by the ground (water) source heat pump in the cold area is better, there is also a large demand for heat load in winter, the system design must be reasonable, and the parameter configuration of the buried heat exchanger of the ground source heat pump system must be considered Sufficient margin to ensure that the heat transfer rate meets the heat pump extraction requirements, and the user must have a large enough open space; the heat transfer parameters of the well water in the water source heat pump system must ensure that the well water can be completely recharged after use to protect the balance of groundwater resources; due to cold The area is dominated by heating, and the air-conditioning load in summer is relatively small, and even some residential quarters only consider heating in winter. The soil source heat pump system often has an imbalance of heat acquisition and heat release in winter and summer, which makes the soil temperature around the buried heat exchanger drop year by year. , which eventually leads to the deterioration of the heating effect of the project year by year. At present, although some projects use cooling tower auxiliary heat release, boiler and solar supplementary heat to achieve soil heat balance, but the economy and energy saving of the system are reduced.

(3) The direct heating system using air source heat pumps in cold regions has problems such as relying on low-efficiency auxiliary electric heaters, poor heating capacity, low energy efficiency ratio, low operational reliability, and difficulty in starting the unit due to frequent defrosting in low-temperature environments. . Therefore, it is difficult to popularize and apply air source heat pumps in the cold and severe cold areas north of the Yellow River.

(4) Although the combined air-conditioning system using solar energy and low-temperature air source heat pumps in cold regions improves the heating effect of air source heat pumps to a certain extent, solar energy cannot be effectively used in continuous haze, rainy, high humidity and ultra-low temperature environments , After the air source heat pump turns on the auxiliary electric heater, frosting and defrosting are still uninterrupted. Even if the unit is difficult to start, the heating temperature is difficult to reach above 45 degrees. The energy efficiency ratio of the heating system is only about 1.5, and the heating effect cannot be guaranteed.

Contents of the invention

According to the deficiencies in the prior art above, the technical problem to be solved by the present invention is: to provide a method that can ensure less frosting and fast defrosting in winter low-temperature haze weather, ensure efficient and stable operation of the system, significantly extend the length of the air-cooled heat pump unit and An integrated system of air-cooled heat pump units with ancillary equipment service life.

The integrated system of the air-cooled heat pump unit according to the present invention includes a heat collection chamber and more than one air-cooled heat pump unit. Air intake shutters, the top of the heat collection chamber and the upper part around it are transparent plates, and air outlets are arranged on the top of the heat collection chamber corresponding to the air guide channels of each air-cooled heat pump unit.

In this integrated system, by placing the air-cooled heat pump unit in the heat collection chamber, the heat from the outside can be collected in the heat collection chamber to ensure less frosting and fast defrosting in winter low temperature and haze weather, so that it can easily cope with low temperature, Wind, snow, fog and haze weather can ensure the efficient and stable operation of the system, and can also significantly prolong the service life of the air-cooled heat pump unit and ancillary equipment. The transparent plate in the present invention can be a transparent sunlight plate, which is convenient for absorbing solar energy and ensures the heat collection effect. At the same time, air intake louvers are installed at the air inlet to realize passive air intake, thereby achieving a good effect of preventing cold wind and accelerating defrosting. In order to further increase the defrosting speed of the air-cooled heat pump unit, it is also possible to install an air guide device on each air-cooled heat pump unit (when there are more than 2 units) (such as installing louvers on the shell of the air-cooled heat pump unit) to realize passive cooling. Wind, that is, driven by the fan of the air-cooled heat pump unit, the outside wind can be sucked into the air-cooled heat pump unit. In order to have a good dust-proof effect, an air filter can be arranged on the inside of the air intake louver.

Since the air-cooled heat pump unit is in operation, the noise is relatively large, which will affect the surrounding environment, so the present invention preferably uses the following two solutions to solve the noise problem:

Option One:

A noise reduction chamber is set above the heat collection chamber. The top surface of the noise reduction chamber is open, and there are layers of noise reduction materials on each side, so as to effectively reduce the noise generated during the operation of the air-cooled heat pump unit, and at the same time ensure that the cold or hot air discharged from the heat collection chamber Quickly drain straight up.

Option II:

A noise reduction chamber is set above the heat collection chamber. One side of the noise reduction chamber is open, and the other side and the top surface have a layer of noise reduction material, so that when the air-cooled heat pump unit is running, the noise on the other side can be significantly reduced, reducing the impact on the specific environmental impact.

Preferably, exhaust louvers are installed on the open side of the noise reduction chamber; from inside to outside, the exhaust louvers discharge air from bottom to top; from outside to inside, the air intake louvers enter air from bottom to top. In this way, the air diversion is more reasonable, so that the heat island effect during summer operation and the cold pool effect during winter operation can be eliminated, thereby significantly improving the energy efficiency of the air-cooled heat pump unit. In order to improve the wind guiding effect, the top surface of the noise reduction chamber is designed as a slope, and the top surface of the noise reduction chamber slopes downward from the open side to the opposite side surface, which promotes the wind at the air outlet of the heat collection chamber. Quick exit from noise reduction room.

In addition to the above two noise reduction methods, mufflers can also be provided in the air guide channels of each air-cooled heat pump unit, and a noise reduction material layer can be provided on the inner wall of the air guide channels to reduce noise. Of course, the noise reduction chamber and muffler can also be used at the same time for noise reduction to enhance the noise reduction effect. The above-mentioned layer of noise-reducing material can adopt a traditional sound-absorbing board.

When there is enough space, a diversion chamber can be added on one side of the heat collection chamber. The diversion chamber is connected to the heat collection chamber. The diversion chamber is made of transparent material, and the end of the diversion chamber away from the heat collection chamber is provided with an air guide port; Corresponding to the diversion chamber, the air intake louvers adopt adjustable louvers. Adjustable shutters are conventional or publicly available devices that can be opened or closed according to actual conditions. When running in winter, just open the air guide and close the adjustable shutters around the air-cooled heat pump unit. In this way, during winter operation, sunlight will enter the diversion chamber through the transparent material to heat up the diversion chamber, so that the cold air entering the outside world will also heat up when passing through the diversion chamber, thereby reducing frosting and ensuring that the air-cooled heat pump unit Normal operation; during summer operation, close the air guide and open the adjustable shutters around the air-cooled heat pump unit to ensure smooth ventilation, so as not to affect the cooling efficiency of the air-cooled heat pump unit in summer. In order to increase the temperature in the diversion chamber, the transparent material can be a transparent sun board. Further preferably, an inspection door is installed at the air guide port to facilitate equipment maintenance and inspection.

Preferably, an air filter is installed at the air guide port of the diversion chamber to filter the outside wind to achieve a dust removal effect. In order to improve the filtering effect, a two-stage air filter can be used. The heat pump unit is equipped with an air filter at the air outlet.

Preferably, the upper part around the heat collection chamber is provided with a switchable ventilation conversion window, and the material of the ventilation conversion window is a transparent plate. Among them, there are many forms of ventilation conversion windows, which can be sliding windows or outward opening windows. In the actual application process, the ventilation conversion window is closed in winter to improve the windproof performance and effectively increase the temperature in the heat collecting room, thereby reducing the thickness of frosting, speeding up defrosting, reducing energy loss, and ensuring the normal operation of the air-cooled heat pump unit; ventilation conversion The windows are opened in summer to ensure smooth ventilation, so as not to affect the cooling efficiency of the air-cooled heat pump unit in summer.

The beneficial effect that the present invention has compared with prior art is:

In the present invention, by placing the air-cooled heat pump unit in the heat collection chamber, the heat from the outside can be collected in the heat collection chamber to ensure less frosting and fast defrosting in winter low-temperature haze weather, so that it can easily cope with low temperature, wind, snow, Haze weather can reduce energy loss and ensure efficient and stable operation of the system. At the same time, it can also significantly prolong the service life of the air-cooled heat pump unit and ancillary equipment; air diversion is more reasonable, which can eliminate the heat island effect during summer operation and winter operation. The cold pool effect can significantly improve the energy efficiency of the air-cooled heat pump unit; when the air-cooled heat pump unit is running, it can significantly reduce noise and reduce the impact on the external environment.

Description of drawings

Fig. 1 is the structural representation of embodiment one among the present invention;

Fig. 2 is the right view of Fig. 1;

Fig. 3 is the sectional view of Fig. 2;

Fig. 4 is the structural representation of embodiment two among the present invention;

Fig. 5 is a right side view of Fig. 1 .

In the figure: 1. Noise reduction material layer; 2. Ventilation conversion window; 3. Noise reduction room; 4. Air intake louvers; ; 9. Air-cooled heat pump unit; 10. Exhaust shutters.

Detailed ways

Embodiments of the present invention are further described below in conjunction with accompanying drawings:

Embodiment one:

As shown in Figure 1-3, the integrated system of the air-cooled heat pump unit includes a heat collection chamber 7 and more than one air-cooled heat pump unit 9, the air-cooled heat pump unit 9 is located in the heat collection chamber 7, and the lower part around the heat collection chamber 7 There is an air inlet, and an air inlet louver 4 is installed at the air inlet. The top of the heat collection chamber 7 and the upper part around it are transparent plates.

In this embodiment, by placing the air-cooled heat pump unit 9 in the heat collection chamber 7, the heat from the outside can be collected in the heat collection chamber 7, ensuring less frosting and fast defrosting in winter low-temperature haze weather, thereby enabling Easily cope with low temperature, snow, fog and haze weather, ensure efficient and stable operation of the system, and at the same time significantly prolong the service life of the air-cooled heat pump unit 9 and its auxiliary equipment. The transparent plate in the present invention can be a transparent sunlight plate, which is convenient for absorbing solar energy and ensures the heat collection effect. At the same time, an air intake shutter 4 is installed at the air inlet to realize passive air intake, thereby playing a good effect of preventing cold wind and accelerating defrosting. In order to further improve the defrosting effect of the air-cooled heat pump unit 9, it is also possible to install an air guide device on each air-cooled heat pump unit 9 (when there are more than 2) (such as installing shutters on the shell of the air-cooled heat pump unit 9), Passive air intake is realized, that is, the outside wind can be sucked into the air-cooled heat pump unit 9 under the drive of the fan of the air-cooled heat pump unit 9 . In order to have a good dustproof effect, an air filter can be arranged inside the air intake louver 4 .

In this example:

The transparent board can use a transparent sun board, which is convenient for absorbing solar energy and ensuring the heat collection effect;

A noise reduction chamber 3 is arranged above the heat collection chamber 7. One side of the noise reduction chamber 3 is open, and the other side and the top surface have a layer of noise reduction material 1, so that when the air-cooled heat pump unit 9 is running, the noise on the other side can be significantly reduced. Noise, reducing impact on specific environments;

A diversion chamber 5 is added on one side of the heat collection chamber 7 (need to have enough space), the diversion chamber 5 communicates with the heat collection chamber 7, the diversion chamber 5 adopts a transparent material (such as a transparent sunlight board), and the diversion chamber 5 The end away from the heat collecting chamber 7 is provided with an air guiding port; corresponding to the guiding chamber 5, the air intake louvers 4 adopt adjustable louvers. Adjustable shutters are conventional or publicly available devices that can be opened or closed according to actual conditions. When running in winter, open the air guide port and close the adjustable shutters around the air-cooled heat pump unit 9 to get final product. Like this, when running in winter, sunlight can enter in the diversion chamber 5 through the transparent material, so that the diversion chamber 5 is heated up, and the cold wind entering from the outside will also heat up when flowing through the diversion chamber 5, thereby reducing frosting and ensuring Normal operation of the air-cooled heat pump unit 9; during summer operation, close the air guide port and open the adjustable shutters around the air-cooled heat pump unit 9 to ensure smooth ventilation, so as not to affect the cooling efficiency of the air-cooled heat pump unit 9 in summer. In order to increase the temperature in the diversion chamber 5, the transparent material can be a transparent solar panel.

An air filter is installed at the air guide port of the diversion chamber 5 and the inside of the air intake louver 4 around the heat collection chamber 7 to filter the outside wind to achieve a dust removal effect. In order to improve the filtering effect, a two-stage air filter can be used , and at the same time, an air filter can also be added at the air outlet of each air-cooled heat pump unit 9;

The upper part around the heat collection chamber 7 is provided with a switchable ventilation conversion window 2 (can be a sliding window, an outward opening window, etc.), and the material of the ventilation conversion window 2 is a transparent plate; Close, improve the windproof performance, effectively increase the temperature in the heat collection chamber 7, thereby speeding up defrosting, reducing energy loss, and ensuring the normal operation of the air-cooled heat pump unit 9. The ventilation conversion window 2 is opened in summer to ensure smooth ventilation and prevent wind from affecting Cooling efficiency of cold heat pump unit 9 in summer.

Embodiment two:

As shown in Figures 4 and 5, the structure of the integrated system of the air-cooled heat pump unit is similar to that of Embodiment 1, except that the structure of the noise reduction chamber 3 arranged above the heat collection chamber 7 is different. One side of 3 is open, and the other side and the top surface have noise-reducing material layer 1 (sound-absorbing board can be used), so that when the air-cooled heat pump unit 9 is running, the noise can be significantly reduced and the impact on the external environment can be reduced; the noise-reducing room 3 The air exhaust louvers 10 are installed on the open side, and the air is discharged from the inside to the outside. The heat island effect during operation and the cold pool effect during winter operation improve the energy efficiency of the air-cooled heat pump unit 9; in order to improve the wind guiding effect, the top surface of the noise reduction chamber 3 is designed as a slope, and the top surface of the noise reduction chamber 3 The side facing from the open side is inclined downward to the opposite side, so that the wind at the air outlet of the heat collecting chamber 7 is quickly discharged from the noise reducing chamber 3 . Other structures in this embodiment are the same as those in Embodiment 1.

In addition to the noise reduction methods described in Embodiment 1 and Embodiment 2, a muffler can also be provided in the air guide channel 8 of each air-cooled heat pump unit 9, and a noise reduction material layer is provided on the inner wall of the air guide channel 8, Thereby reducing noise. Of course, the noise reduction chamber 3 and the muffler can also be used for noise reduction at the same time to enhance the noise reduction effect. The above-mentioned noise reduction material layer can use a traditional sound-absorbing board.

Claims (9)

1. A kind of 1. integrated system of Air-Cooled Heat Pump Unit, it is characterised in that：Including heat collecting chamber (7) and more than one air-cooled heat Pump assembly (9), Air-Cooled Heat Pump Unit (9) are located in heat collecting chamber (7), and the lower part of heat collecting chamber (7) surrounding has air inlet, air inlet The top of place's installation inlet air shutter (4), heat collecting chamber (7) top and its surrounding is transparent panel, corresponding each Air-Cooled Heat Pump Unit (9) Air-guiding aisle (8) air outlet is set at the top of the heat collecting chamber (7)；Diversion chamber (5), diversion chamber are added in the side of heat collecting chamber (7) (5) communicated with heat collecting chamber (7), diversion chamber (5) uses transparent material, and the one end of diversion chamber (5) away from heat collecting chamber (7) is equipped with wind-guiding Mouthful；Corresponding diversion chamber (5), air feed shutter window (4) use adjustable shutter.
2. 2. the integrated system of Air-Cooled Heat Pump Unit according to claim 1, it is characterised in that：In the heat collecting chamber (7) Side sets noise reduction chamber (3), and the opened top of noise reduction chamber (3), each side has acoustic damping materials layer (1).
3. 3. the integrated system of Air-Cooled Heat Pump Unit according to claim 1, it is characterised in that：In the heat collecting chamber (7) Side sets noise reduction chamber (3), and the one side of noise reduction chamber (3) opens wide, other sides and top surface have acoustic damping materials layer (1).
4. 4. the integrated system of Air-Cooled Heat Pump Unit according to claim 3, it is characterised in that：The noise reduction chamber (3) is spacious Air draft shutter (10) is installed on the side opened；From inside to outside, air draft shutter (10) outlet air from bottom to top；Ecto-entad, into Wind shutter (4) inlet air from bottom to top.
5. 5. the integrated system of Air-Cooled Heat Pump Unit according to claim 3, it is characterised in that：The noise reduction chamber (3) Top surface, from unlimited side towards one side corresponding thereto, tilts down.
6. 6. according to the integrated system of any Air-Cooled Heat Pump Units of claim 1-5, it is characterised in that：Described is each air-cooled Muffler is set in the air-guiding aisle (8) of heat pump unit (9), acoustic damping materials layer is equipped with the inner wall of air-guiding aisle (8).
7. 7. the integrated system of Air-Cooled Heat Pump Unit according to claim 1, it is characterised in that：Installed at the air guide hole Maintenance door (6).
8. 8. the integrated system of Air-Cooled Heat Pump Unit according to claim 1, it is characterised in that：The diversion chamber (5) At air guide hole and the air feed shutter window of heat collecting chamber (7) surrounding inner side installation airstrainer.
9. 9. according to the integrated system of any Air-Cooled Heat Pump Units of claim 1-4, it is characterised in that：The heat collecting chamber (7) top of surrounding is equipped with switchable ventilation changing window (2), and the material of ventilation changing window (2) is transparent panel.