CN215637696U

CN215637696U - Air-cooled heat pump air conditioning unit condenser re-cooling system

Info

Publication number: CN215637696U
Application number: CN202121029864.8U
Authority: CN
Inventors: 潘善伟
Original assignee: Hangzhou Medical College
Current assignee: Hangzhou Medical College
Priority date: 2021-05-13
Filing date: 2021-05-13
Publication date: 2022-01-25
Anticipated expiration: 2031-05-13

Abstract

The utility model discloses a recooling system of a condenser of an air-cooled heat pump air conditioning unit, which combines a water cooling mode in the ventilation and cooling process of the condenser of the air-cooled heat pump air conditioning unit on the basis of the original air-cooled heat pump air conditioning unit, namely, a small recooling water circulating device is added on the original unit and comprises a tap water pipeline, a water supply tank, a cooling tower, a water collecting tank, a first water pump, a second water pump, a water spray pipe and a water receiving disc; tap water pipeline connects spray pipe, feed tank respectively through the connecting tube, and first water pump is connected to the spray pipe in the feed tank, and the spray pipe is used for sending water to scatter and sprays to the condenser of unit on, and the condenser bottom is located to the water collector dish to be connected to the header tank through the connecting tube, second water pump, cooling tower, feed tank link to each other in proper order in the header tank. The system can greatly improve the cooling effect of the condenser in high-temperature weather, improve the effect of an indoor air conditioner and the comprehensive energy efficiency ratio of the system, solve the problem of utilization of non-gasified and water-binding water and greatly save energy.

Description

Air-cooled heat pump air conditioning unit condenser re-cooling system

Technical Field

The utility model belongs to the technical field of air conditioner energy conservation, and relates to a device for improving the cooling effect of a condenser of air-cooled air conditioning equipment.

Background

The air-cooled heat pump air conditioning unit does not need to be provided with an air conditioning machine room and has two functions of cooling and heating, so the air-cooled heat pump air conditioning unit is widely applied to the commercial market. The air-cooled heat pump air conditioning unit is different from a water chilling unit, the biggest difference is that a water-cooled cooling mode is adopted for a condenser of the water chilling unit, the condenser of the air-cooled heat pump air conditioning unit is air-cooled, the ventilation mode of the air-cooled heat pump air conditioning unit is generally side-in and side-out, the air conditioning unit is generally installed on a roof, the ventilation effect is good, the noise influence is small, and the air-cooled heat pump air conditioning unit often has the following defects:

1) in summer working conditions, the COP (coefficient of performance) of the water chilling unit is 5-6 and even higher; the coefficient of performance (COP) of the air-cooled heat pump air conditioning unit is 2.8-3.5, and the refrigeration energy efficiency ratio is generally lower;

2) the air has more floating dust, the surface of the condenser of the heat pump unit is easy to be dusted, and the heat exchange effect of the outdoor condenser is easy to be influenced;

3) the air conditioning effect is poor in high-temperature seasons, the requirement for air conditioning temperature reduction is more insufficient, and the influence on the life and production of users is caused. According to the design specification of the air conditioner, the design load of the air conditioner is allowed to be lower than the actual demand load in a certain period of summer, namely the temperature of the air conditioner can not meet the requirement of the design temperature for about 5-8 days in the hottest period of summer;

4) excessive condensing pressure and excessive unit current increase the probability of mechanical and electrical faults of the unit and also reduce the service life of the air conditioning equipment.

The utility model provides a recooling system of an air-cooled heat pump air conditioning unit condenser on the basis, which improves the cooling effect of a condenser in high-temperature weather by increasing smaller facility change and lower cost investment, improves the effect of an air conditioner in high-temperature weather, reduces the running current of a main machine of the air conditioner and improves the running efficiency of the unit.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a recooling system for a condenser of an air-cooled heat pump air conditioning unit, aiming at the defects of the prior art, the system combines a water cooling mode into the cooling process of the condenser of the air-cooled heat pump air conditioning unit on the basis of the original air-cooled heat pump air conditioning unit, can greatly improve the condensation effect of a high-temperature day air condenser, improve the energy efficiency of an air conditioner, solve the problem of utilization of unvaporized condensate water and greatly save energy.

The technical scheme adopted by the utility model is as follows:

a recooling system of a condenser of an air-cooled heat pump air conditioning unit is provided with a recooling water circulating device on the basis of the air-cooled heat pump air conditioning unit, and comprises a tap water pipeline, a water supply tank, a cooling tower, a water collecting tank, a first water pump, a second water pump, a water spray pipe and a water collecting tray; tap water pipeline passes through the connecting tube and connects the spray pipe respectively, the feed tank, first water pump sets up in the feed tank, first water pump is connected to the spray pipe through the connecting tube, all be provided with the valve on each connecting tube, the spray pipe is used for sending water and sprays to the condenser fin of air-cooled heat pump air conditioning unit, the water collector is located the condenser bottom and is used for catching surplus water, and be connected to the header tank through the connecting tube, the second water pump sets up in the header tank, the second water pump, the cooling tower, the feed tank links to each other in proper order.

In the above technical scheme, further, the header tank in be provided with level gauge and filter screen, after satisfying system operation condition, utilize the signal control second water pump of level gauge to open and close, the water that gets into in the header tank must filter through the filter screen earlier, and only when reaching certain liquid level after the second water pump is allowed to open.

Furthermore, a liquid level device is arranged in the water supply tank.

Furthermore, the water spraying pipe adopts a divergent water spraying device.

Furthermore, a plurality of air-cooled heat pump air conditioning units can be arranged in the system at the same time, each unit corresponds to a set of spray pipes, and spray regulating valves are installed on the spray pipes;

furthermore, the system also comprises a controller, and the first water pump, the second water pump, the cooling tower and the valve are all connected with the controller.

Furthermore, the air-cooled heat pump air conditioning unit is installed on the ground or at a plane position below the ground, condensed water of an air conditioner inside a building is collected through a pipeline and is connected into a water supply tank of the recooling water circulating device, the condensed water is used as a water supplementing function, and the cooling effect of a condenser of the air-cooled heat pump unit can be further improved.

And further, whether the recooling system is put into operation or not is controlled by a set temperature and an operation signal of the air-cooled heat pump air conditioning unit.

The system of the utility model combines water cooling and air cooling heat pump air conditioning units, sprays water on the condenser fins, and brings scattered water into the condenser fins through return air flow, so that the whole condenser coil is further cooled, the condensing pressure is reduced, the current capacity of the compressor is greatly reduced, the cooling water can be directly supplied by tap water or circularly supplied by adopting cooling water, and meanwhile, the system of the utility model also solves the problem of utilization of un-gasified water, effectively avoids waste of water resources, and finally realizes the purpose of energy-saving and high-efficiency operation.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic diagram illustrating a control method of the present invention;

in the figure, the water supply device comprises a tap water pipeline 1, a water supply tank 2, a water supply tank 3, a cooling tower 4, a water collecting tank 5, a water spray pipe 6, a water collecting tray 7, a first water pump 8, a second water pump 9, a filter screen 10, an electric contact liquid level meter 11 and a floating ball liquid level meter.

Detailed Description

The utility model is described in detail below with reference to the figures and specific embodiments.

An air-cooled heat pump air conditioning unit condenser sub-cooling system, the structure of which is shown in fig. 1, comprises: the air-cooled heat pump air-conditioning unit comprises a tap water pipeline 1, a water supply tank 2, a small cooling tower 3 and a water collecting tank 4, wherein a first water pump 7 and a floating ball liquid level indicator 11 are arranged in the water supply tank, a second water pump 8, an electric contact liquid level meter 10, a filter screen 9 and valves F1, F2, F3, F4 and F5 are arranged in the water collecting tank, and the air-cooled heat pump air-conditioning unit is exemplified by two sets of air-cooled heat pump air-conditioning units: the unit 1 and the unit 2 are respectively and correspondingly provided with a set of water spray pipes 5 on the respective condensers, the bottoms of the water spray pipes are provided with water receiving discs 6, the water spray pipes 5 spray water onto fins of the condensers, and the scattered water is brought into the fins of the condensers through return air flow, so that the whole condensers are further cooled, the condensation pressure is reduced, the current amount of the compressors is greatly reduced, wherein the scattered water can be directly provided by tap water or by circulating water, if the tap water is directly adopted, only F1, F4 and F5 need to be opened, valves F2 and F3 are closed, and other equipment and facilities are all in a closed state; if the running water is not used and the cooling water circulation supply is started, then:

1) f1 is closed, F2, F3, F4 and F5 are opened, 2 air cooling and heating pump units are started, the first water pump 7 in the water supply tank is started immediately, the residual water of the unit 1 and the unit 2 enters a water receiving tray, the residual water is collected through a pipeline, the residual water returns to a water collecting tank, the water is pumped to the cooling tower 3 through a second water pump 8 after passing through a filter screen, and the water is collected to the water supply tank 2 after being cooled; if only the air-cooled heat pump unit of the unit 1 is started, F4 is opened, F5 is closed, and the running states of other running components of the sub-cooling system are unchanged.

2) The water collecting tank 4 must ensure a safe liquid level, the start and stop of the second water pump are controlled by a liquid level meter, for example, in the example, an electric contact liquid level meter 10 is arranged to control the second water pump 8, and the second water pump 8 cannot be started when the liquid level is insufficient; the liquid level in the water supply tank must be ensured, the floating ball liquid level device 11 is adopted for control in the embodiment, and the insufficient part is controlled by the water supplement of the floating ball valve.

The water spraying pipe is preferably a divergent water spraying device, a PVC or PPR pipeline can be selected, the number of water spraying openings is large, the opening size is small, the contact surface of the water spraying pipe and the condenser fin is enlarged, the actual water consumption is not large, the circulating water quantity is very small, and the energy consumption and the investment cost of a water pump and a cooling tower are very low; valves F4 and F5 are spraying water regulating valves, if the unit condenser is asymmetric, regulating valves are respectively installed after two water pipes of each unit are distributed, and the regulating valves are used for regulating the water spraying pressure and the uniformity of two water spraying pipes of the unit;

in addition, a controller can be arranged in the system, and the first water pump, the second water pump, the cooling tower fan, the valves F1, F2, F3 and the liquid level device can be connected with the controller. The starting of the spray pipe spraying device can be controlled by the suction or disconnection signal of a main contactor of a compressor or an exhaust fan of the unit and synchronously runs with the compressor or the exhaust fan; in addition, the system can also set temperature limits, for example, the system is only put into use in summer high-temperature weather conditions, namely, the sub-cooling system can be operated only when the boundary of outdoor temperature change and whether the unit is in an operating state are met. Fig. 2 is a schematic diagram of a possible control method of the present invention.

The system is suitable for an air-cooled heat pump air conditioning unit and a VRV multi-split air conditioning unit, in particular to an air conditioning unit with an outdoor condenser in a V shape or a C shape. The whole system can be directly added on the basis of the original air-cooled heat pump air conditioning unit (only a water supply tank, a water collecting tank, a small-sized cooling tower and corresponding pipelines are needed to be arranged near the roof unit), and the installation or the modification is convenient because the water circulation amount is very small. Through the experimental detection (the refrigerating capacity is 280KW) of a heat pump air conditioning unit system of a workshop of a certain factory in a sand development area in Hangzhou, when the outdoor dry bulb temperature is about 36.0 ℃ in the afternoon in summer, the air conditioning effect in a production workshop is improved by adopting the system, and meanwhile, the comprehensive energy consumption ratio of the air cooling heat pump air conditioning unit is improved by 13 percent, so that the energy is effectively saved.

Claims

1. A recooling system of a condenser of an air-cooled heat pump air conditioning unit is characterized in that a recooling water circulating device is added on the basis of the air-cooled heat pump air conditioning unit and comprises a tap water pipeline, a water supply tank, a cooling tower, a water collecting tank, a first water pump, a second water pump, a water spray pipe and a water collecting tray; tap water pipeline passes through the connecting tube and connects the spray pipe respectively, the feed tank, first water pump sets up in the feed tank, first water pump is connected to the spray pipe through the connecting tube, all be provided with the valve on each connecting tube, the spray pipe is used for sending water and sprays to the condenser fin of air-cooled heat pump air conditioning unit, the water collector is located the condenser bottom and is used for catching surplus water, and be connected to the header tank through the connecting tube, the second water pump sets up in the header tank, the second water pump, the cooling tower, the feed tank links to each other in proper order.

2. The air-cooled heat pump air conditioning unit condenser sub-cooling system of claim 1, wherein the water collection tank is internally provided with a liquid level indicator and a filter screen, the on-off of the second water pump is controlled by a signal of the liquid level indicator, and water entering the water collection tank is filtered by the filter screen and then output by the second water pump.

3. The air-cooled heat pump air conditioning unit condenser sub-cooling system of claim 1, wherein a level gauge is provided in the supply tank.

4. The air-cooled heat pump air conditioning unit condenser sub-cooling system of claim 1, wherein the spray lines are divergent spray devices.

5. The air-cooled heat pump air conditioning unit condenser sub-cooling system of claim 1, wherein a plurality of air-cooled heat pump air conditioning units are provided in the system simultaneously, each unit corresponding to a set of spray pipes, and spray regulating valves are installed on the spray pipes.

6. The air-cooled heat pump air conditioning unit condenser sub-cooling system of claim 1, further comprising a controller, wherein the first water pump, the second water pump, the cooling tower, and the valve are connected to the controller.

7. The air-cooled heat pump air conditioning unit condenser sub-cooling system of claim 1, wherein the air-cooled heat pump air conditioning unit is installed at a floor level or below, and condensed air conditioning water inside the building is collected through a pipe and introduced into a water supply tank of the sub-cooling water circulation device.