Fluorine pump outdoor unit with plate heat exchanger

Abstract

This utility model provides an outdoor unit for a refrigerant pump with a plate heat exchanger. The outdoor unit includes a frame, inside which the plate heat exchanger is fixedly installed. A fan is fixed to the top of the frame, spray components are installed on both sides of the frame, and spraying components are installed at the bottom and top of the frame. A refrigerant pump and a liquid receiver are installed inside the frame. The inlet of the refrigerant pump is connected to the indoor unit, and the outlet of the refrigerant pump is connected to the inlet of the plate heat exchanger via the liquid receiver. The outlet of the plate heat exchanger is connected to the indoor unit. An electrical control component is also installed inside the frame, and the electrical control component is electrically connected to the plate heat exchanger, the spray components, and the spraying components. This outdoor unit with a plate heat exchanger can be used in various data center cooling systems to fully utilize natural cold sources and achieve energy saving, power saving, cost saving, and water saving functions in data centers.

Description

Technical Field

[0001] This utility model relates to the technical field of outdoor units, specifically to a refrigerant pump outdoor unit with a plate heat exchanger. Background Technology

[0002] With the proposal and advancement of information technology projects, the scale and number of data centers have also developed rapidly. To reduce energy consumption in data centers and rationally allocate social resources, it is necessary to optimize data center cooling systems. Improving the Energy Efficiency Ratio (EER) of cooling units is one effective method. EER refers to the energy efficiency ratio of cooling units such as air conditioning equipment, defined as the ratio of the cooling capacity provided by the cooling unit to the energy consumed by the equipment itself under rated operating conditions; it is also known as the coefficient of performance. A higher EER value indicates that the cooling unit absorbs more heat through evaporation or that the compressor consumes less electrical energy, meaning it generates more cooling capacity with less electricity.

[0003] Utilizing natural cooling sources is currently a crucial method for addressing the high energy consumption of data center server rooms, and natural cooling sources are a renewable energy source. However, my country has a wide geographical range; while southern regions have abundant water resources, they lack natural cooling sources. Traditional finned heat exchangers used in the south, employing evaporative condensation or atomized condensation methods, often experience corrosion. Conversely, northern regions have ample natural cooling sources but insufficient water resources, severely impacting the normal operation of traditional finned tube heat exchangers.

[0004] Therefore, there is an urgent need to provide a new solution to address the defects and shortcomings of the existing technologies. Utility Model Content

[0005] In order to overcome the defects and shortcomings of the existing technology, this utility model proposes an outdoor unit for a fluorine pump with a plate heat exchanger.

[0006] The technical solution adopted by this utility model to solve its technical problem is: An outdoor unit for a refrigerant pump with a plate heat exchanger, the outdoor unit comprising a frame, characterized in that: a plate heat exchanger is fixedly installed inside the frame; a fan is fixedly installed on the top of the frame; spray components are installed on both sides of the frame; spraying components are installed at the bottom and top of the frame; a refrigerant pump and a liquid receiver are installed inside the frame; the inlet of the refrigerant pump is connected to the indoor unit; the outlet of the refrigerant pump is connected to the inlet of the plate heat exchanger via the liquid receiver; the outlet of the plate heat exchanger is connected to the indoor unit; and an electrical control component is also installed inside the frame, the electrical control component being electrically connected to the plate heat exchanger, the spray components, and the spraying components respectively.

[0007] As a further preferred embodiment of this utility model, a water baffle is fixedly provided on the outer side of the frame.

[0008] As a further preferred embodiment of the present invention, the plate heat exchanger includes an upper cover plate and a lower cover plate, and a plurality of heat exchange plate groups are fixedly arranged between the upper cover plate and the lower cover plate. Each heat exchange plate group has a liquid flow channel on its inner side, and an air flow channel is arranged between adjacent heat exchange plate groups. The liquid flow channel and the air flow channel are configured as a sealed structure. The plate heat exchanger has a refrigerant inlet and a refrigerant outlet on its two sides, respectively. The refrigerant inlet is connected to the refrigerant outlet through the liquid flow channel.

[0009] As a further preferred embodiment of this utility model, the plate heat exchanger can be used as a condenser or a dry cooler; and the number of liquid flow channels and air flow channels inside the plate heat exchanger can be set as needed.

[0010] As a further preferred embodiment of this utility model, the refrigerant pump is a fluorine pump, and the refrigerant pump is any one of a rotary refrigerant pump, a centrifugal refrigerant pump, or a gear refrigerant pump.

[0011] As a further preferred embodiment of the present invention, the spray assembly includes a spray water pump and a water tank fixed inside the frame. One end of the spray water pump is connected to the inside of the water tank, and the other end of the spray water pump is connected to the spray head. The spray head is fixedly disposed on both sides of the plate heat exchanger.

[0012] As a further preferred embodiment of the present invention, the spray assembly includes a spray water pump fixed inside the frame and a water receiving box fixed at the bottom of the frame. One end of the spray water pump is connected to the inside of the water receiving box, and the other end of the spray water pump is connected to the spray head. The spray head is fixedly installed on the top of the plate heat exchanger.

[0013] As a further preferred embodiment of this utility model, a liquid level switch is provided between the water receiving box and the spray water pump. When the internal liquid level of the water receiving box is not lower than the preset liquid level, the liquid level switch is turned on, and the water receiving box is connected to the spray water pump. When the internal liquid level of the water receiving box is lower than the preset liquid level, the liquid level switch is closed, and the water receiving box is not connected to the spray pump.

[0014] As a further preferred embodiment of this utility model, the outdoor unit is connected to the indoor unit, and the indoor unit is selected from any one of the following: room-level air conditioning indoor unit, row-level air conditioning indoor unit, air wall-level indoor unit, and back panel-level indoor unit; or The outdoor unit is connected to a liquid cooling terminal, which can be either a cold plate type liquid cooling terminal or an immersion type liquid cooling terminal. The outdoor unit can operate in evaporative condensation mode, waterless air-cooled mode, or refrigerant pump mode.

[0015] Compared with the prior art, the beneficial effects achieved by this utility model include: 1) This utility model provides an outdoor unit for a refrigerant pump with a plate heat exchanger, which can operate in a waterless air-cooled mode in water-scarce areas and in an evaporation-condensation mode in areas with abundant water resources. This outdoor unit with a plate heat exchanger can be used in various data center cooling systems to make full use of natural cold sources and achieve energy saving, power saving, cost saving and water saving functions in data centers.

[0016] 2) This utility model provides a refrigerant pump outdoor unit with a plate heat exchanger. The plate heat exchanger is used as the condenser or dry cooler of the air conditioning system and other refrigeration units. Compared with traditional finned heat exchangers and microchannel heat exchangers, the heat exchange efficiency is higher, which can reduce the condensing temperature and thus improve the system energy efficiency. It can also adopt evaporative condensation devices according to local conditions to further reduce the condensing temperature and improve the system energy efficiency. At the same time, the outdoor unit equipped with a plate heat exchanger effectively integrates gas pump compression refrigeration technology, which can effectively utilize outdoor natural cold sources during day and night, transitional seasons and winter, improve the unit's operating efficiency, and save energy and electricity.

[0017] 3) This utility model provides a refrigerant pump outdoor unit with a plate heat exchanger. Combining traditional finned heat exchangers and plate heat exchangers, it can give full play to the high-efficiency heat exchange capacity of the plate heat exchanger on the refrigerant side and the high-efficiency heat exchange capacity of the air side. The outdoor unit can flexibly switch between evaporation and condensation mode, waterless air-cooled mode and refrigerant pump mode, taking into account both water conservation and high-efficiency heat exchange capacity. The number of liquid flow channels and air flow channels can be adjusted as needed according to system performance requirements and actual use needs. For example, the refrigerant flow can be adjusted to a single flow, dual flow or multi flow path as needed to optimize the refrigerant distribution path.

[0018] 4) This utility model provides a refrigerant pump outdoor unit with a plate heat exchanger. The outdoor unit is connected to the indoor unit. The indoor unit can be any one of room-level air conditioning indoor unit, row-level air conditioning indoor unit, air wall-level indoor unit, and back panel-level indoor unit; or the outdoor unit can be connected to a liquid cooling terminal, and the liquid cooling terminal can be any one of cold plate liquid cooling terminal or immersion liquid cooling terminal, which effectively increases the scope of application. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Figure 1 This is a three-dimensional structural diagram of the outdoor unit provided by this utility model; Figure 2 This is a schematic diagram of the internal structure of the outdoor unit provided by this utility model; Figure 3 This is an exploded view of the structure of the outdoor unit and internal spray assembly provided by this utility model; Figure 4 This is an exploded view of the outdoor unit and internal sprinkler assembly provided by this utility model; Figure 5 This is a schematic diagram of the plate heat exchanger provided by this utility model; Figure 6 This is a schematic diagram showing the connection relationship between the outdoor unit and the indoor unit provided by this utility model.

[0021] Figure 7 This is a schematic diagram of the circulation loop of the outdoor unit operating in evaporation and condensation mode provided by this utility model.

[0022] Figure 8 This is a schematic diagram of the circulation loop of the outdoor unit operating in waterless air-cooled mode provided by this utility model.

[0023] Legend: 1-Frame; 11-Water baffle; 2-Plate heat exchanger; 21-Upper cover plate; 22-Lower cover plate; 23-Heat exchange plate assembly; 231-Liquid flow channel; 232-Air flow channel; 24-Refrigerant inlet; 25-Refrigerant outlet; 3- Fan; 4-Spray assembly; 41-Spray water pump; 42-Spray head; 5-Sprinkler assembly; 51-Sprinkler pump; 52-Water receiving box; 53-Sprinkler head; 6-Electrical control components; 7-Refrigerant pump; 8-Reservoir. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" or "linked" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a mechanical connection or an electrical connection; it can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] [First Embodiment] like Figure 1-6The image shows an outdoor unit with a refrigerant pump and a plate heat exchanger, according to the first embodiment of this utility model. The outdoor unit includes a frame 1, a plate heat exchanger 2 fixedly installed inside the frame 1, a fan 3 fixedly installed on the top of the frame 1, spray components 4 installed on both sides of the frame 1, and spray components 5 installed at the bottom and top of the frame 1. A refrigerant pump 7 and a liquid receiver 8 are installed inside the frame 1. The inlet of the refrigerant pump 7 is connected to the indoor unit, and the outlet of the refrigerant pump 7 is connected to the inlet of the plate heat exchanger 2 via the liquid receiver 8. The outlet of the plate heat exchanger 2 is connected to the indoor unit. An electrical control component 6 is also installed inside the frame 1. The electrical control component 6 is electrically connected to the plate heat exchanger 2, the spray components 4 and the spray components 5, respectively, so as to control and adjust the start and stop of the plate heat exchanger 2 and the number of working channels, the start and stop and the power of the spray components 4 and the start and stop and the power of the spray components 5.

[0027] Preferably, the frame 1 in this embodiment is made of stainless steel, which has advantages in corrosion resistance and small size compared to traditional copper tube aluminum fin heat exchangers and microchannel heat exchangers; Figure 4 As shown, a water baffle 11 is fixedly installed on the outside of the frame 1 to improve the rainproof performance of the outdoor unit.

[0028] like Figure 5 As shown, the plate heat exchanger 2 in this embodiment includes an upper cover plate 21 and a lower cover plate 22. Multiple heat exchange plate groups 23 are fixedly arranged between the upper cover plate 21 and the lower cover plate 22. Each heat exchange plate group 23 has a liquid flow channel 231 on its inner side, and an air flow channel 232 is arranged between adjacent heat exchange plate groups 23. The liquid flow channel 231 and the air flow channel 232 are sealed. A refrigerant inlet 24 and a refrigerant outlet 25 are respectively provided on both sides of the plate heat exchanger 2. The refrigerant inlet 24 is connected to the refrigerant outlet 25 via the liquid flow channel 231. The refrigerant inlet is connected to the outlet of the indoor unit evaporator via a pipeline. Gaseous refrigerant flows into the plate heat exchanger 2, exchanges heat with outdoor dry / humid air through the fan 3, spray assembly 5, and spray device 4, turning the refrigerant into a liquid state and sending it into the liquid receiver 8 for storage. It is then pressurized and compensated by a refrigerant pump and transferred to the evaporator to provide cooling for the data center.

[0029] It is worth noting that the plate heat exchanger 2 in this embodiment can be used as both a condenser and a dry cooler. When the plate heat exchanger 2 is used as a condenser, various types of refrigerants can flow through the internal liquid flow channel 231 of the plate heat exchanger 2 to achieve phase change condensation. When the plate heat exchanger 2 is used for single-phase heat exchange, it can be used as a dry cooler. At this time, the internal refrigerant can be cooling water or ethylene glycol, etc., to meet different cooling requirements and increase the applicability.

[0030] Furthermore, the number of liquid flow channels 231 and air flow channels 232 inside the plate heat exchanger 2 can be set as needed. Based on the actual heat exchange requirements of the user and the heat exchange capacity of the plate heat exchanger 2, the electronic control component 6 controls the plate heat exchanger 2 to adjust the flow mode of the channels, thereby adjusting the refrigerant flow channel to the corresponding single-pass, double-pass, or multi-pass flow path to optimize the refrigerant distribution path.

[0031] Based on this, the refrigerant pump 7 provided in this embodiment is a fluorine pump, and the refrigerant pump 7 is any one of a rotary refrigerant pump, a centrifugal refrigerant pump, or a gear refrigerant pump.

[0032] like Figure 3 As shown, the spray assembly 4 in this embodiment includes a spray water pump 41 and a water tank fixed inside the frame 1. One end of the spray water pump 41 is connected to the inside of the water tank, and the other end of the spray water pump 41 is connected to the spray head 42. The spray head 42 is fixedly installed on both sides of the plate heat exchanger 2. When the spray assembly 4 is working, the spray water pump 41 delivers the spray water in the water tank to the spray head 42 on both sides of the plate heat exchanger 2 through the spray pipeline, and then sprays the spray water to the return air side of the plate heat exchanger 2, so that the air temperature is close to the wet bulb temperature, thereby reducing the outdoor condensation temperature.

[0033] like Figure 4 As shown, the spray assembly 5 in this embodiment includes a spray water pump 51 fixed inside the frame 1 and a water collection box 52 fixed at the bottom of the frame 1. One end of the spray water pump 51 is connected to the inside of the water collection box 52, and the other end of the spray water pump 51 is connected to the spray head 53. The spray head 53 is fixedly installed on the top of the plate heat exchanger 2. When the spray assembly 5 is working, the spray water pump 51 lifts the spray water in the water collection box 52 to the top spray head 53 of the plate heat exchanger 2, and then sprays the spray water onto the surface of the plate heat exchanger 2. The evaporation of the spray water carries away the heat of the refrigerant inside the plate heat exchanger 2. The excess spray water will fall back into the water collection box 52 at the bottom of the outdoor unit. This cycle is repeated to complete the circulation of the spray water. As a further preferred embodiment, a level switch is provided between the water receiving box 52 and the spray pump 51. When the internal liquid level of the water receiving box 52 is not lower than the preset liquid level, the level switch is turned on, and the water receiving box 52 is connected to the spray pump 51. When the internal liquid level of the water receiving box 52 is lower than the preset liquid level, the level switch is turned off, and the water receiving box 52 is not connected to the spray pump 51. This is to control the spray assembly 5 to stop spraying when the liquid level in the box is lower than the preset liquid level and to send a water level shortage warning to the electronic control component 6. When sufficient spray water is added to the water receiving box 52 so that the liquid level in the box reaches the preset liquid level again, the level switch is turned on, thereby controlling the spray assembly 5 to start spraying again and sending a water level sufficient warning to the electronic control component 6.

[0034] like Figure 6As shown, in this embodiment, the outdoor unit is connected to the indoor unit, and the indoor unit can be any one of the following: room-level air conditioning indoor unit, row-level air conditioning indoor unit, air wall-level indoor unit, and back panel-level indoor unit; or the outdoor unit is connected to the liquid cooling terminal, and the liquid cooling terminal can be any one of the following: cold plate type liquid cooling terminal or immersion type liquid cooling terminal, thereby effectively increasing the applicability of the outdoor unit.

[0035] The outdoor unit provided in this embodiment can operate in any one of the following modes: evaporative condensation mode, waterless air-cooled mode, or refrigerant pump mode.

[0036] like Figure 7 The diagram shows a circulation loop of the outdoor unit operating in evaporation-condensation mode according to this utility model. The fan 3 is located on top of the plate heat exchanger 2. The outlet of the plate heat exchanger 2 is connected to the inlet of the expansion valve H1 via the liquid receiver 8 and the refrigerant pump 7. The outlet of the expansion valve H1 is connected to the inlet of the cooling channel of the indoor unit evaporator H2. The outlet of the cooling channel of the indoor unit evaporator H2 is connected to the inlet of the plate heat exchanger 2 via the compressor H3. The spray assembly 5, consisting of the spray pump 51, the spray head 53, and the water collection box 52, enables the plate heat exchanger 2 to be sprayed circulatedly, thereby realizing the evaporation-condensation mode of the outdoor unit (in this process, the spray assembly 4 can be combined to further realize evaporation-condensation, which is not shown in this figure). A refrigerant pump series check valve F1 is connected in series between the outlet of refrigerant pump 7 and the inlet of expansion valve H1. A refrigerant pump parallel check valve F2 is also connected in parallel outside the refrigerant pump 7 and the refrigerant pump series check valve F1. When the refrigerant pump series check valve F1 is closed and the refrigerant pump parallel check valve F2 is open, the refrigerant pump 7 participates in the circuit operation of the indoor unit and the outdoor unit. When the refrigerant pump series check valve F1 is open and the refrigerant pump parallel check valve F2 is closed, the refrigerant pump 7 does not participate in the circuit operation of the indoor unit and the outdoor unit. Similarly, a compressor series check valve F3 is connected in series between the outlet of compressor H3 and the inlet of plate heat exchanger 2. A compressor parallel check valve F4 is also connected in parallel outside compressor 1 and compressor series check valve F3. When compressor series check valve F3 is closed and compressor parallel check valve F4 is open, compressor H3 participates in the circuit operation of indoor and outdoor units. When compressor series check valve F3 is open and compressor parallel check valve F4 is closed, compressor H3 does not participate in the circuit operation of indoor and outdoor units. like Figure 8 The diagram shown is a schematic of the circulation loop of the outdoor unit of this utility model operating in the waterless dry cooling mode, which is related to... Figure 7 The only difference is that, since the outdoor unit operates in a waterless dry cooling mode, there is no spray assembly 4 or spray assembly 5 that sprays onto the plate heat exchanger 2.

[0037] When there is no natural cold source available outdoors, i.e., when the real-time outdoor temperature T > the first threshold temperature T1, the outdoor unit can operate in evaporative condensation mode or waterless air-cooled mode. Since there is no natural cold source at this time, condensation can only be achieved by compensating for the temperature difference between the compressor and the outdoor temperature through compressor pressurization. If the plate heat exchanger 2 is used as the condenser at this time, it can have higher heat transfer efficiency compared with traditional copper tube aluminum fin heat exchangers and microchannel heat exchangers. It can reduce the compressor's compensation for temperature difference, reduce the compressor power, thereby improving the air conditioning performance ratio. It can also use evaporative condensation according to local conditions to further reduce the condensation temperature, thereby achieving more energy-efficient and efficient air conditioning operation.

[0038] For example, when the first threshold temperature T1 is 20℃ and the outdoor real-time temperature T is 35℃: when the return air temperature of the data center air conditioning terminal is controlled at 24℃, the supply air temperature is 12~15℃, and the evaporation temperature is about 8~10℃. If the outdoor unit condenser uses plate heat exchanger 2, then when the outdoor real-time temperature is higher than 20℃, for example, when the outdoor real-time temperature is 35℃, using a traditional condenser, the condensation temperature is about 45~48℃. However, using plate heat exchanger 2 for condensation and heat dissipation is more efficient than using a traditional condenser, thereby reducing the condensation temperature, turning the gaseous refrigerant into liquid refrigerant and sending it to the liquid receiver 8 for storage (at this time, if the plate heat exchanger 2 is working in evaporative condensation mode, the condensation temperature can be reduced to 35~40℃), and through the electronic expansion valve, the pressure is reduced to become a low-temperature, low-pressure gas-liquid mixture refrigerant, cooling the return air temperature from 24℃ to 12~15℃. If the plate heat exchanger 2 is used as a condenser, the outdoor wet-bulb temperature is required as the threshold temperature for opening and closing the spray and misting operations. If the plate heat exchanger 2 is used as a dry cooler, the refrigerant outlet temperature of the plate heat exchanger 2 is required to be determined based on the real-time outdoor temperature. If the temperature is higher than the preset temperature, additional wet cooling or auxiliary cooling is required.

[0039] When a certain degree of natural cold source is available outdoors, i.e., the second threshold temperature T2 < the real-time outdoor temperature T ≤ the first threshold temperature T1, the outdoor unit operates in waterless air-cooled mode. Due to the availability of a natural cold source, the compressor operates in pump mode to compensate for the temperature difference with the outdoor temperature and achieve condensation. The compressor operates at a low compression ratio, resulting in high energy efficiency. If the plate heat exchanger 2 is used as the condenser at this time, it has higher heat transfer efficiency compared to traditional copper tube aluminum fin and microchannel heat exchangers. Furthermore, by using the outdoor wet-bulb temperature as the opening and closing threshold temperature for spray and mist operation to activate the evaporation-condensation mode, the compressor's compensation for the temperature difference can be further reduced, thus lowering the compressor power and improving the air conditioning performance ratio. This allows the system to obtain outdoor cold source more efficiently.

[0040] For example, when the first threshold temperature T1 is 20℃, the second threshold temperature T2 is 5℃, and the outdoor real-time temperature T is 15℃: when the return air temperature of the data center air conditioning terminal is controlled at 24℃, the supply air temperature is 12~15℃, the evaporation temperature is about 8~10℃, and the outdoor condenser uses plate heat exchanger 2, then when the outdoor real-time temperature is higher than 5℃ and lower than 20℃, the compressor starts running in air pump mode. For example, at this time, the outdoor real-time temperature is 15℃. Since there is a certain natural cold source at this time, the condensation temperature is low. Using a traditional condenser, the condensation temperature is about 25~28℃. However, using plate heat exchanger 2 for condensation and heat dissipation, the condensation effect is more efficient than using traditional copper tube aluminum fin heat exchanger or microchannel heat exchanger, thereby reducing the condensation temperature, turning the gaseous refrigerant into liquid refrigerant and sending it to the liquid receiver 8 for storage (if the evaporative condensation mode is used, the condensation temperature can be reduced to 20~25℃ at this time), so as to reduce the compressor's compensation temperature difference and cool the return air to the target temperature for data center cooling. Since a certain amount of natural cold source can be utilized at this time, neither spray assembly 5 nor mist assembly 4 needs to operate, further reducing the compressor's temperature difference compensation and lowering compressor power, thereby improving the air conditioning performance ratio and enabling the system to more efficiently obtain outdoor cold source. If the plate heat exchanger 2 is used as a condenser, the outdoor wet-bulb temperature needs to be used as the opening and closing threshold temperature for spray and mist operation; if the plate heat exchanger 2 is used as a dry cooler, the refrigerant outlet temperature of the plate heat exchanger 2 is determined according to the outdoor temperature. When the outdoor temperature is low, a certain amount of natural cold source can be utilized, resulting in good energy-saving effect.

[0041] When the outdoor natural cooling source is sufficient, i.e., when the real-time outdoor temperature T ≤ the second threshold temperature T2, the outdoor unit operates in refrigerant pump mode. At this time, the compressor is off, and the refrigerant pump is on. The indoor and outdoor units form a refrigerant pump circulation unit consisting of a compressor in parallel with a one-way valve, plate heat exchanger 2, liquid receiver 8, refrigerant pump 7, a refrigerant pump in series with a one-way valve, electronic expansion valve, and evaporator. This unit lowers the return air temperature to the target value to provide cooling for the data center. Since the natural cooling source is sufficient at this time, the spray assembly 5, mist assembly 4, and compressor do not need to operate. Because the power consumption of the refrigerant pump 7 is much lower than that of the compressor, significant energy and power savings can be achieved.

[0042] For example, when the return air temperature of the data center air conditioning terminal is controlled at 24℃, the supply air temperature is 12~15℃, and the evaporation temperature is approximately 8~10℃. If the outdoor condenser uses a plate heat exchanger, then when the outdoor temperature is below 5℃, the unit operates in refrigerant pump mode. For instance, if the outdoor temperature is 5℃, since there is sufficient natural cold source, the compressor is off. Driven by the refrigerant pump, the gaseous refrigerant that has absorbed heat after evaporation in the evaporator enters the plate heat exchanger for condensation and heat dissipation. The condensation temperature is approximately 12~15℃. Using a plate heat exchanger, compared to traditional copper tube aluminum fin and microchannel heat exchangers, can more efficiently acquire outdoor cooling capacity, turning the refrigerant into a liquid state for storage in the liquid receiver. It is then pressurized and compensated by the refrigerant pump, and then enters the electronic expansion valve for throttling and depressurization, becoming a low-temperature, low-pressure gas-liquid mixture of refrigerant, which is then transferred to the terminal evaporator to cool the data center. If the plate heat exchanger is used as a dry cooler, its refrigerant outlet temperature is determined based on the outdoor temperature. In low-temperature outdoor environments, it can effectively utilize natural cold sources and has good energy-saving effects.

[0043] For example, when the second threshold temperature is 5℃ and the outdoor real-time temperature is 3℃, and the return air temperature of the data center air conditioning terminal is controlled at 24℃, the supply air temperature is 12~15℃, and the evaporation temperature is approximately 8~10℃. If the outdoor condenser uses a plate heat exchanger, then when the outdoor temperature is below 5℃, for example, when the outdoor real-time temperature is 3℃, the indoor and outdoor units operate in refrigerant pump mode. At this time, the compressor is off, and under the drive of the refrigerant pump 7, the gaseous refrigerant that has absorbed heat after evaporation in the evaporator enters the plate heat exchanger 2 for condensation and heat dissipation. The condensation temperature is approximately 12~15℃. Using plate heat exchanger 2, compared with traditional copper tube aluminum fin and microchannel heat exchangers, it can more efficiently acquire outdoor cooling capacity, turn the refrigerant into liquid and send it to the liquid receiver 8 for storage, and then pressurize it through the refrigerant pump 7. Then, it enters the electronic expansion valve for throttling and depressurization, turning it into a low-temperature, low-pressure gas-liquid mixture of refrigerant, and then it is transferred to the evaporator to provide cooling for the data center. If the plate heat exchanger 2 is used as a dry cooler, its refrigerant outlet temperature needs to be determined according to the outdoor temperature. In the low-temperature outdoor environment, it can effectively utilize natural cold sources and has good energy-saving effect.

[0044] 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 fluorine pump outdoor unit with a plate heat exchanger, said outdoor unit comprising a frame (1), characterized in that: A plate heat exchanger (2) is fixedly installed inside the frame (1). A fan (3) is fixedly installed on the top of the frame (1). Spray assemblies (4) are installed on both sides of the frame (1). Spraying assemblies (5) are installed at the bottom and top of the frame (1). A refrigerant pump (7) and a liquid receiver (8) are installed inside the frame (1). The inlet of the refrigerant pump (7) is connected to the indoor unit. The outlet of the refrigerant pump (7) is connected to the inlet of the plate heat exchanger (2) via the liquid receiver (8). The outlet of the plate heat exchanger (2) is connected to the indoor unit. An electrical control assembly (6) is also installed inside the frame (1). The electrical control assembly (6) is electrically connected to the plate heat exchanger (2), the spray assembly (4), and the spraying assembly (5), respectively.

2. The fluorine pump outdoor unit with plate heat exchanger according to claim 1, characterized in that: A water baffle (11) is fixedly installed on the outside of the frame (1).

3. The fluorine pump outdoor unit with plate heat exchanger according to claim 1, characterized in that: The plate heat exchanger (2) includes an upper cover plate (21) and a lower cover plate (22). Multiple heat exchange plate groups (23) are fixedly arranged between the upper cover plate (21) and the lower cover plate (22). Each heat exchange plate group (23) has a liquid flow channel (231) on its inner side and an air flow channel (232) between adjacent heat exchange plate groups (23). The liquid flow channel (231) and the air flow channel (232) are set as a sealed structure. The plate heat exchanger (2) has a refrigerant inlet (24) and a refrigerant outlet (25) on its two sides respectively. The refrigerant inlet (24) is connected to the refrigerant outlet (25) through the liquid flow channel (231).

4. The fluorine pump outdoor unit with plate heat exchanger according to claim 3, characterized in that: The plate heat exchanger (2) can be used as a condenser or a dry cooler; and the number of liquid flow channels (231) and air flow channels (232) inside the plate heat exchanger (2) can be set as needed.

5. The fluorine pump outdoor unit with plate heat exchanger according to claim 1, characterized in that: The refrigerant pump (7) is a fluorine pump, and the refrigerant pump (7) is any one of a rotary refrigerant pump, a centrifugal refrigerant pump or a gear refrigerant pump.

6. The fluorine pump outdoor unit with plate heat exchanger according to claim 1, characterized in that: The spray assembly (4) includes a spray water pump (41) and a water tank fixed inside the frame (1). One end of the spray water pump (41) is connected to the inside of the water tank, and the other end of the spray water pump (41) is connected to the spray head (42). The spray head (42) is fixedly installed on both sides of the plate heat exchanger (2).

7. The fluorine pump outdoor unit with plate heat exchanger according to claim 1, characterized in that: The spray assembly (5) includes a spray water pump (51) fixed inside the frame (1) and a water receiving box (52) fixed at the bottom of the frame (1). One end of the spray water pump (51) is connected to the inside of the water receiving box (52), and the other end of the spray water pump (51) is connected to the spray head (53). The spray head (53) is fixedly installed on the top of the plate heat exchanger (2).

8. The fluorine pump outdoor unit with plate heat exchanger according to claim 7, characterized in that: A level switch is provided between the water receiving box (52) and the spray water pump (51). When the internal liquid level of the water receiving box (52) is not lower than the preset liquid level, the liquid level switch is turned on, and the water receiving box (52) is connected to the spray water pump (51). When the internal liquid level of the water receiving box (52) is lower than the preset liquid level, the liquid level switch is closed, and the water receiving box (52) is not connected to the spray water pump (51).

9. The outdoor unit of a refrigerant pump with a plate heat exchanger according to claim 1, characterized in that: The outdoor unit is connected to the indoor unit, and the indoor unit is selected from any one of the following: room-level air conditioning indoor unit, row-level air conditioning indoor unit, air wall-level indoor unit, and back panel-level indoor unit; or The outdoor unit is connected to a liquid cooling terminal, which can be either a cold plate type liquid cooling terminal or an immersion type liquid cooling terminal. The outdoor unit can operate in evaporative condensation mode, waterless air-cooled mode, or refrigerant pump mode.

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