Air-cooled heat pump cooling device

Abstract

The utility model relates to a kind of air-cooled heat pump cooling devices, its innovation point is at:Including cooling unit and cooling water softening unit, the cooling unit includes water replenishing pipe and the filter, solenoid valve, pressurized water pump and universal atomizing nozzle being arranged on water replenishing pipe, the filter is close to the water inlet end of water replenishing pipe, the water outlet end of water replenishing pipe is equipped with the universal atomizing nozzle cooling the condenser of heat pump, the cooling water softening unit includes soft water equipment, first, second and third manual valve, the first manual valve is equipped on water replenishing pipe, and the first and second bypass branch pipes are equipped with with water replenishing pipe intercommunication on the two sides of first manual valve, the first bypass branch pipe is connected with the water inlet of soft water equipment, and is equipped with second manual valve, the second bypass branch pipe is connected with the water outlet of soft water equipment, and is equipped with third manual valve.The utility model can effectively reduce hot cold condenser temperature in high temperature season, improve heat pump refrigerating capacity, to ensure operating room constant temperature and humidity clean environment.

Description

Technical Field

[0001] This utility model relates to a cooling device, specifically an air-cooled heat pump cooling device. Background Technology

[0002] Currently, hospital operating room clean areas are equipped with heating and cooling sources for year-round operation. The most commonly used type of heating and cooling source is the air-cooled heat pump, which is widely used in the medical cleanroom field because it can utilize space in the hospital building's annex or roof, eliminating the need for a separate chiller station. Equipping the operating room with a separate heating and cooling source allows the air conditioning operation to be independent of the building's central air conditioning water supply temperature, providing high-quality chilled water to maintain and stabilize the temperature and humidity within the operating room. However, because the heat pump uses air cooling rather than water cooling, its condenser heat dissipation is significantly affected by the ambient temperature, especially in high-temperature and high-humidity environments. Poor condenser heat dissipation directly leads to a decrease in the heat pump's cooling capacity and a significant increase in power consumption. Therefore, it is necessary to design a cooling device that can effectively reduce the temperature of the heat pump condenser and increase its cooling capacity during hot seasons to ensure a constant temperature and humidity clean environment within the operating room. Utility Model Content

[0003] The purpose of this invention is to provide an air-cooled heat pump cooling device that can effectively reduce the temperature of the hot and cold condenser and increase the cooling capacity of the heat pump during high-temperature seasons, thereby ensuring a constant temperature, humidity and clean environment in the operating room.

[0004] To achieve the above objectives, the technical solution of this utility model is: an air-cooled heat pump cooling device, including an air-cooled heat pump, the innovation of which lies in: further including a cooling unit and a cooling water softening unit.

[0005] The cooling unit includes a water supply pipe, a filter, a solenoid valve, a pressurized water pump, and a universal atomizing nozzle. The water supply pipe is equipped with a filter, a solenoid valve, and a pressurized water pump, with the filter located near the inlet end of the water supply pipe. The outlet end of the water supply pipe is equipped with a universal atomizing nozzle, which is arranged opposite to the condenser of the air-cooled heat pump.

[0006] The cooling water softening unit includes a water softening device, a first manual valve, a second manual valve, and a third manual valve. The water supply pipe is also equipped with a first manual valve, which is located between the filter and the solenoid valve. On both sides of the first manual valve are a first bypass branch pipe and a second bypass branch pipe that are connected to the water supply pipe. The first bypass branch pipe is connected to the inlet of the water softening device, and a second manual valve is installed on the first bypass branch pipe. The second bypass branch pipe is connected to the outlet of the water softening device, and a third manual valve is installed on the second bypass branch pipe.

[0007] In the above technical solution, a temperature sensor for monitoring the ambient temperature is provided on the back of the condenser of the air-cooled heat pump.

[0008] In the above technical solution, a gate valve is also provided on the water supply pipe, and the gate valve is located inside the filter and close to the first manual valve.

[0009] In the above technical solution, the air-cooled heat pump is fixed on the heat pump foundation.

[0010] The above technical solution also includes a PLC control box, and the temperature sensor, solenoid valve and pressurized water pump are electrically connected to the corresponding connection terminals of the PLC control box.

[0011] The advantages of this invention are: the air-cooled heat pump cooling device of this invention also includes a cooling unit and a cooling water softening unit.

[0012] The cooling unit includes a water supply pipe, a filter, a solenoid valve, a pressurized water pump, and a universal atomizing nozzle. The water supply pipe is equipped with a filter, a solenoid valve, and a pressurized water pump, with the filter located near the inlet end of the water supply pipe. The outlet end of the water supply pipe is equipped with a universal atomizing nozzle, which is arranged opposite to the condenser of the air-cooled heat pump.

[0013] The cooling water softening unit includes a water softener, a first manual valve, a second manual valve, and a third manual valve. The water supply pipe also has a first manual valve located between the filter and the solenoid valve. A first bypass branch pipe and a second bypass branch pipe, both connected to the water supply pipe, are located on either side of the first manual valve. The first bypass branch pipe is connected to the inlet of the water softener and has a second manual valve. The second bypass branch pipe is connected to the outlet of the water softener and has a third manual valve.

[0014] During hot seasons, the first manual valve is closed, while the solenoid valve and the booster pump are both open. Cooling water enters the water supply pipe, is filtered, and then softened by a water softener to reduce hardness. Finally, under the action of the booster pump, the softened cooling water is sprayed onto the condenser of the air-cooled heat pump through a universal atomizing nozzle, thereby lowering the condenser temperature.

[0015] The advantages of this utility model are:

[0016] 1) Significantly improves high-temperature cooling capacity: During the high-temperature season, the temperature of the heat pump condenser can be effectively reduced by evaporative cooling, thereby increasing the cooling capacity of the heat pump and ensuring the supply of cooling capacity to the operating room.

[0017] 2) Stable temperature and humidity control in the operating room: With the recovery and enhanced stability of cooling capacity, the purification air conditioning system can directly ensure that the operating room can be precisely maintained at a temperature of 24-26℃ and a relative humidity of 50%-60%, meeting medical standards and reducing the risk of surgical infection.

[0018] 3) Improve the system energy efficiency ratio (COP) and reduce operating costs: For every 1°C decrease in condensing temperature, the COP can be increased by about 3% to 5%, resulting in a significant reduction in energy consumption during high-temperature operation and substantial long-term electricity savings (especially for operating room air conditioners that run 24 hours a day).

[0019] 4) Reduce the risk of high-temperature shutdown and ensure system reliability: Prevent the heat pump from being triggered by excessively high condensing pressure / temperature, ensure the continuous and uninterrupted operation of the operating room air conditioner, and avoid medical safety accidents caused by air conditioning interruption.

[0020] 5) Relieve compressor load and extend equipment life: It can effectively reduce the compression ratio and exhaust temperature, reduce the mechanical and thermal stress of the compressor, and reduce wear, thus significantly extending the service life of the compressor and the entire heat pump unit.

[0021] 6) Low-cost retrofitting and quick results: Compared with replacing with a larger cooling unit or adding a chiller unit, this utility model is not only simple in structure, but also has low retrofitting cost, short cycle and quick results, making it suitable for the rapid and efficient upgrading of existing systems.

[0022] 7) Improve heat dissipation and reduce fan energy consumption: Water spray evaporation can enhance heat exchange efficiency, and in some cases, it is permissible to reduce the speed of the condenser fan, further reducing fan power consumption and reducing fan noise pollution.

[0023] 8) Due to limited space in some application sites, heat pump units may be able to be installed, but there may not be enough space for heat dissipation. By adding this utility model, the operational stability of the heat pump can be greatly improved. Attached Figure Description

[0024] Figure 1 This is a structural schematic diagram of a specific embodiment of the present invention;

[0025] Figure 2 This is a flowchart illustrating the operation of this utility model. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and the given embodiments, but it is not limited thereto.

[0027] like Figure 1 , 2 As shown, an air-cooled heat pump cooling device includes an air-cooled heat pump 100, a cooling unit, and a cooling water softening unit.

[0028] The cooling unit includes a water supply pipe 1, a filter 2, a solenoid valve 3, a pressurized water pump 4, and a universal atomizing nozzle 5. The water supply pipe 1 is equipped with the filter 2, the solenoid valve 3, and the pressurized water pump 4, with the filter 2 located near the inlet end of the water supply pipe 1. The outlet end of the water supply pipe 1 is equipped with the universal atomizing nozzle 5, which is arranged opposite to the condenser 101 of the air-cooled heat pump 100.

[0029] The cooling water softening unit includes a water softener 6, a first manual valve 7, a second manual valve 8, and a third manual valve 9. The water supply pipe 1 is also equipped with a first manual valve 7, which is located between the filter 2 and the solenoid valve 3. The first manual valve 7 has a first bypass branch pipe and a second bypass branch pipe on both sides, which are connected to the water supply pipe 1. The first bypass branch pipe is connected to the inlet of the water softener 6, and the second bypass branch pipe is equipped with a second manual valve 8. The second bypass branch pipe is connected to the outlet of the water softener 6, and the third bypass branch pipe is equipped with a third manual valve 9.

[0030] In normal operation, the first manual valve 7 is closed, while the second manual valve 8 and the third manual valve 9 are open. If maintenance of the cooling unit is required, the first manual valve 7 is open, while the second manual valve 8 and the third manual valve 9 are closed.

[0031] Furthermore, such as Figure 1 As shown, in order to facilitate monitoring of ambient temperature and obtain more accurate real-time ambient temperature so as to better dissipate heat from the condenser of the air-cooled heat pump, a temperature sensor 10 for monitoring ambient temperature is provided on the back of the condenser 101 of the air-cooled heat pump 100. The advantage of this design is that it can prevent the temperature sensor from being exposed to direct sunlight and failing to fully reflect the true ambient temperature, thus avoiding the cooling effect of the cooling device on the condenser.

[0032] Furthermore, such as Figure 1 As shown, in order to facilitate device maintenance and filter cleaning, a gate valve 11 is also provided on the water supply pipe 1. The gate valve 11 is located inside the filter 2 and close to the first manual valve 7. If device maintenance and filter cleaning are required, the gate valve 11 can be closed.

[0033] Furthermore, such as Figure 1 As shown, in order to more stably fix the air-cooled heat pump, the air-cooled heat pump 100 is fixed on the heat pump base 200.

[0034] Furthermore, such as Figure 1As shown, in order to achieve more intelligent control of the cooling device, a PLC control box 12 is also included. The temperature sensor 10, solenoid valve 3 and pressurized water pump 4 are electrically connected to the corresponding connection terminals of the PLC control box 12.

[0035] like Figure 2 As shown, when the temperature sensor 10 detects that the actual ambient temperature is higher than the start-up temperature set by the PLC control box 12 (taking 35℃ as an example), the PLC control box 12 starts the solenoid valve 3 and the pressurized water pump 4, so that the cooling water is filtered through the filter 2, then softened by the water softening device 6 to reduce the water hardness, and then transported through the water supply pipe 1. Finally, the softened cooling water is sprayed onto the condenser for cooling using the universal atomizing nozzle 5.

[0036] When the temperature sensor 10 detects that the actual ambient temperature is lower than the start-up temperature set by the PLC control box 12, the PLC control box 12 first shuts down the pressurized water pump 4, and after a certain delay, shuts down the solenoid valve 3.

[0037] If the heat pump installation site experiences several consecutive days of high temperatures, the set start-up temperature can be adjusted appropriately through the PLC control box 12 to avoid prolonged operation of the pressurized water pump. Alternatively, water spraying can be performed at regular intervals to cool the water, saving water resources and preventing the condenser fins from remaining damp, which would accelerate scale formation.

[0038] It's important to note that the cooling effect (cooling capacity) and efficiency (COP - coefficient of performance) of an air-cooled heat pump are highly dependent on the condenser temperature (more precisely, the condensing temperature). As the condensing temperature increases, the cooling capacity decreases, and power consumption increases (COP decreases); conversely, as the condensing temperature decreases, the cooling capacity increases, and power consumption decreases (COP increases).

[0039] When the condensing temperature rises, the ratio of condensing pressure to evaporating pressure (compression ratio) increases significantly. This means the compressor needs to do more work to compress the low-temperature, low-pressure gas to a higher pressure, leading to a sharp increase in compressor power consumption (input power). When the compressor operates at a high compression ratio, its volumetric efficiency decreases, reducing the actual refrigerant mass flow rate pumped and resulting in a decrease in cooling capacity.

[0040] The relationship between condensing temperature increase and cooling capacity depends on the specific heat pump unit's model, design, refrigerant type, and operating conditions (especially evaporating temperature). However, there are widely accepted empirical formulas and estimates in the industry: for every 1°C increase in condensing temperature, cooling capacity decreases by approximately 2%-4%, compressor power consumption increases by approximately 2%-4%, and COP decreases by approximately 3%-5%. Conversely, for every 1°C decrease in condensing temperature, cooling capacity can increase by approximately 2%-4%, compressor power consumption can decrease by approximately 2%-4%, and COP can increase by approximately 3%-5%.

[0041] Assuming a heat pump operates at an ambient temperature of 43°C (where the condensing temperature could reach 50°C+), its cooling capacity without water spray is 100kW. The water spray system lowers the condensing temperature by 8°C. Assuming a 3% increase in cooling capacity, the increase would be 100kW * (0.03 * 8) = 100kW * 0.24 = 24kW (a 24% increase). This increase is extremely significant in hot weather. It could directly determine whether the operating room can maintain the strict temperature and humidity requirements.

[0042] In summary, the advantages of this utility model are:

[0043] 1) Significantly improves high-temperature cooling capacity: During the high-temperature season, especially at extreme temperatures above 40°C, evaporative cooling can effectively reduce the temperature of the heat pump condenser by 5-15°C, increasing the heat pump cooling capacity by 10%-40% (depending on the temperature reduction), thus ensuring the supply of cooling capacity to the operating room.

[0044] 2) Stable temperature and humidity control in the operating room: With the recovery and enhanced stability of cooling capacity, the purification air conditioning system can directly ensure that the operating room can be precisely maintained at a temperature of 24-26℃ and a relative humidity of 50%-60%, meeting medical standards and reducing the risk of surgical infection.

[0045] 3) Improve the system energy efficiency ratio (COP) and reduce operating costs: For every 1°C decrease in condensing temperature, the COP can be increased by about 3% to 5%, resulting in a significant reduction in energy consumption during high-temperature operation and substantial long-term electricity savings (especially for operating room air conditioners that run 24 hours a day).

[0046] 4) Reduce the risk of high-temperature shutdown and ensure system reliability: Prevent the heat pump from being triggered by excessively high condensing pressure / temperature, ensure the continuous and uninterrupted operation of the operating room air conditioner, and avoid medical safety accidents caused by air conditioning interruption.

[0047] 5) Relieve compressor load and extend equipment life: It can effectively reduce the compression ratio and exhaust temperature, reduce the mechanical and thermal stress of the compressor, and reduce wear, thus significantly extending the service life of the compressor and the entire heat pump unit.

[0048] 6) Low-cost retrofitting and quick results: Compared with replacing with a larger cooling unit or adding a chiller unit, this utility model is not only simple in structure, but also has low retrofitting cost, short cycle and quick results, making it suitable for the rapid and efficient upgrading of existing systems.

[0049] 7) Improve heat dissipation and reduce fan energy consumption: Water spray evaporation can enhance heat exchange efficiency, and in some cases, it is permissible to reduce the speed of the condenser fan, further reducing fan power consumption and reducing fan noise pollution.

[0050] 8) Intelligent start-stop on demand, saving water and energy: Through temperature control or pressure control strategies (such as starting at >40℃), it only operates during periods of extreme high temperature, minimizing water and electricity consumption (the power of the water pump is usually only 1 to 3 kW).

[0051] 9) Due to limited space in some application sites, heat pump units may be able to be installed, but there may not be enough space for heat dissipation. By adding this utility model, the operational stability of the heat pump can be greatly improved.

[0052] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A cooling device for an air-cooled heat pump, comprising an air-cooled heat pump (100), characterized in that: It also includes a cooling unit and a cooling water softening unit. The cooling unit includes a water supply pipe (1), a filter (2), a solenoid valve (3), a pressurized water pump (4), and a universal atomizing nozzle (5). The water supply pipe (1) is equipped with a filter (2), a solenoid valve (3), and a pressurized water pump (4), and the filter (2) is close to the water inlet end of the water supply pipe (1). The water outlet end of the water supply pipe (1) is equipped with a universal atomizing nozzle (5), and the universal atomizing nozzle (5) is arranged opposite to the condenser (101) of the air-cooled heat pump (100). The cooling water softening unit includes a water softener (6), a first manual valve (7), a second manual valve (8), and a third manual valve (9). The water supply pipe (1) is also equipped with a first manual valve (7), which is located between the filter (2) and the solenoid valve (3). The first manual valve (7) is equipped with a first bypass branch pipe and a second bypass branch pipe on both sides, which are connected to the water supply pipe (1). The first bypass branch pipe is connected to the inlet of the water softener (6), and the second bypass branch pipe is equipped with a second manual valve (8). The second bypass branch pipe is connected to the outlet of the water softener (6), and the third bypass branch pipe is equipped with a third manual valve (9).

2. The air-cooled heat pump cooling device according to claim 1, characterized in that: The air-cooled heat pump (100) has a temperature sensor (10) on the back of the condenser (101) for monitoring the ambient temperature.

3. The air-cooled heat pump cooling device according to claim 1, characterized in that: The water supply pipe (1) is also equipped with a gate valve (11), and the gate valve (11) is located inside the filter (2) and close to the first manual valve (7).

4. The air-cooled heat pump cooling device according to claim 1, characterized in that: The air-cooled heat pump (100) is fixed on the heat pump base (200).

5. The air-cooled heat pump cooling device according to claim 2, characterized in that: It also includes a PLC control box (12), wherein the temperature sensor (10), solenoid valve (3) and pressurized water pump (4) are electrically connected to the corresponding connection terminals of the PLC control box (12).

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