CN205655422U - Phase transition heat transfer and compression refrigeration combined cooling system - Google Patents

Abstract

Phase-change heat and compression refrigeration composite cooling system, including: phase-change heat subsystem, compression refrigeration subsystem, outdoor air circulation subsystem and indoor air circulation subsystem; the phase-change heat subsystem includes a heat exchange core , a water receiving tray and a spraying device, the indoor air and the outdoor air perform heat exchange at the heat exchange core, the spraying device sprays water to the heat exchange core, and the water receiving tray accepts the heat exchanged water sprayed by the spraying device The water in the core body, the water receiving tray and the spraying device are communicated through the spraying water pipeline; the compression refrigeration subsystem includes a condenser, a compressor and an evaporator, and the condenser, the evaporator, and the compressor are circulated through the refrigerant pipeline connected. The utility model integrates phase conversion heat and mechanical refrigeration, is energy-saving and efficient, and indoor air and outdoor air perform heat exchange through the heat exchange core, and the internal and external air are isolated to ensure the air quality in the data center.

Description

Composite cooling system of phase conversion heat and compression refrigeration

technical field

The utility model relates to a refrigeration system, in particular to a compound refrigeration system which utilizes phase transformation heat and adopts mechanical refrigeration as a supplement.

Background technique

In the communication equipment room and data center, the energy consumption of the air conditioner in the equipment room occupies a considerable proportion. Therefore, how to realize the energy saving of the air conditioning system is the breakthrough point of energy saving and emission reduction in the construction of the equipment room and data center. Since the data center has the characteristics of all-weather operation, how to use the natural cooling source to realize the cooling air-conditioning system has become the direction of research. The existing methods of using the natural cooling source for cooling mainly include the following two methods:

1. Fresh air cooling. Fresh air cooling is to filter the outdoor fresh air through the filter and send it directly to the communication room or data center. The heated air is discharged to the outside and circulated to realize cooling using natural cooling sources;

2. Ethylene glycol is naturally cooled. Ethylene glycol is naturally cooled by adding an ethylene glycol cooling coil to the indoor unit, and arranging a dry cooler outdoors. The ethylene glycol is cooled by the dry cooler, and the cooled ethylene glycol is sent to To the cooling coil of the indoor unit, realize the cooling using the natural cold source.

But the above two technical solutions still have the following deficiencies:

The fresh air cooling method is used to directly pass the outdoor air into the communication room or data center. Although it has been filtered by the filter, the dust in the air cannot be completely filtered, resulting in poor indoor cleanliness, and the filter needs to be cleaned regularly. maintenance; if the air contains corrosive gases such as sulfur dioxide, it will also cause a certain degree of damage to the equipment in the communication room or data center; in addition, it is difficult to control the relative humidity of the fresh air, and must Larger ventilation holes are opened on the body, which destroys the integrity of the building, and at the same time brings hidden dangers such as heat leakage, cold bridge, water leakage, etc. In addition, the fresh air unit is usually large in size and needs to be installed independently, occupying the indoor usable area Wait.

The ethylene glycol natural cooling unit integrates the ethylene glycol cooling coil in the indoor unit, which adds a set of piping system, which makes the construction complicated, and will cause the indoor fan to have a large wind resistance and high power, which brings great impact on its energy saving. More discounts; at the same time, the heat exchange efficiency of ethylene glycol solution is low, and it is cooled by a closed air-cooled dry cooler, resulting in a higher condensation temperature when the compressor is running when the ambient temperature is high, which also improves the operation of the compressor. Power, user investment is larger.

Utility model content

The purpose of the utility model is to provide a high-efficiency and energy-saving composite cooling system of phase-change heat and compression refrigeration.

In order to achieve the above object, the utility model takes the following technical solutions:

Phase-change heat and compression refrigeration composite cooling system, including: phase-change heat subsystem, compression refrigeration subsystem, outdoor air circulation subsystem and indoor air circulation subsystem; the phase-change heat subsystem includes a heat exchange core , a water receiving tray and a spraying device, the indoor air and the outdoor air perform heat exchange at the heat exchange core, the spraying device sprays water to the heat exchange core, and the water receiving tray accepts the heat exchanged water sprayed by the spraying device The water in the core body, the water receiving tray and the spraying device are communicated through the spraying water pipeline; the compression refrigeration subsystem includes a condenser, a compressor and an evaporator, and the condenser, the evaporator, and the compressor are circulated through the refrigerant pipeline connected.

As an improvement of the utility model, the outdoor air circulation subsystem includes a condensing fan, an outdoor air outlet, and an outdoor air inlet. The condensing fan is set on the outdoor air circulation channel. When the condensing fan is working, outdoor air enters , After passing through the heat exchange core and the condenser, it is discharged from the outdoor air outlet to form an outdoor air circulation.

As an improvement of the utility model, the indoor air circulation subsystem includes an indoor circulation fan, an indoor air supply port, and an indoor air return port. The indoor circulation fan is arranged on the indoor air circulation channel. The return air enters, passes through the heat exchange core and the evaporator, and then is sent out from the indoor air supply port to form indoor air circulation.

As an improvement of the utility model, the spraying device includes a spraying pipe and a water pump arranged on the spraying water pipe, the spraying pipe is connected with the spraying water pipe and arranged above the heat exchange core, and the spraying device passes through the pipe Connected to an external hydration system.

As an improvement of the utility model, the phase-change heat subsystem further includes a wet film, the wet film is arranged before the heat exchange core on the outdoor air circulation path, the spray pipe is arranged above the wet film, The water receiving tray is arranged below the wet film.

As an improvement of the utility model, the phase-change heating subsystem includes at least one set of water receiving trays and spraying devices.

As an improvement of the present utility model, the number of the indoor circulation fans is one or more.

As an improvement of the utility model, the number of said evaporators is one or more than one.

As an improvement of the utility model, the number of the condenser and the condensing fan is one or more.

As an improvement of the utility model, the compressor is an inverter compressor.

As an improvement of the utility model, the condensed water generated by the compression refrigeration subsystem is sent to the water receiving tray through a pipeline.

From the above technical solutions, it can be seen that the refrigeration system of the present invention includes multiple circulation subsystems, the outdoor circulating air and the indoor circulating air exchange heat at the heat exchange core, and the indoor air circulation belongs to the internal circulation of the machine room, ensuring that the indoor air High quality, no complicated air filtration system, can make full use of natural cold source; use evaporative cooling to assist refrigeration to further reduce the running time of mechanical refrigeration of variable frequency compressor, realize energy-saving operation, adopt mechanical refrigeration to assist purely use natural cold source at high temperature Insufficient refrigeration, improve the cooling effect.

Description of drawings

In order to illustrate the embodiment of the utility model more clearly, the accompanying drawings that need to be used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the utility model , for those skilled in the art, other drawings can also be obtained according to these drawings on the premise of not paying creative work.

Fig. 1 is the structural representation of the utility model embodiment 1;

Fig. 2 is the structural representation of the utility model embodiment 2;

Fig. 3 is a schematic structural view of Embodiment 3 of the present utility model.

detailed description

The present invention will be described in detail below in conjunction with the accompanying drawings. When describing the embodiments of the present invention in detail, for the convenience of explanation, the accompanying drawings showing the structure of the device will not be partially enlarged according to the general scale, and the schematic diagram is only an example, and it should not be limited here. The protection scope of the present invention. It should be noted that the drawings are in simplified form and use inaccurate scales, which are only used to facilitate and clearly assist the purpose of illustrating the embodiments of the present invention.

Example 1

As shown in Figure 1, the composite cooling system of phase conversion heat and compression refrigeration of the present invention includes a water receiving tray 1, a water pump 2, a spray pipe 3, a condenser 4, a condensing fan 5, a compressor 6, an electronic expansion valve 7, Indoor circulation fan 8, evaporator 9 and heat exchange core 10. In FIG. 1 , the direction indicated by the dotted arrow is the circulation direction of the evaporative cooling water, and the direction indicated by the solid arrow is the circulation direction of the refrigerant. The refrigeration system of the present invention includes four circulation subsystems, which are: a phase-change thermal subsystem, a compression refrigeration subsystem, an outdoor air circulation subsystem and an indoor air circulation subsystem.

The phase change thermal subsystem of this embodiment includes a water receiving tray 1, a water pump 2, a spray pipe 3, a heat exchange core 10, and a pipe connecting the water receiving tray and the spray pipe. Wherein, the spray pipe 3 is arranged above the heat exchange core 10, and the water receiving tray 1 is used to receive the cooling water sprayed by the spray pipe. The water pump 2, the water in the water receiving tray 1 is transported to the spray pipe 3 through the water pump 2, and then sprayed on the outdoor air by the spray pipe 3 to cool the outdoor air, and finally falls into the water receiving tray 1, using spraying phase change The heat exchange is carried out in the way of cooling, and this cycle is used. The outdoor air flows to the heat exchange core after being sprayed with cooling water to exchange heat with the indoor air. The spray pipe and the water pump installed on the spray water pipe constitute the spray device. The spray device is connected to the external water supply system through the pipeline at the same time. After the water is evaporated and consumed, it is supplied through the external water supply system. What the heat exchange core body of the utility model adopts is the product sold on the market. The spray pipe is arranged above the heat exchange core, and the spray effect is the best, but the spray pipe can also be arranged beside the heat exchange core according to space requirements.

The compression refrigeration subsystem includes a condenser 4 , a compressor 6 , an evaporator 9 , and a refrigerant pipeline that circulates through the condenser 4 , the evaporator 9 , and the compressor 6 . The refrigerant pipeline is also provided with an electronic expansion valve 7 . The refrigerant circulates between the condenser 4 and the evaporator 9 through the refrigerant pipeline driven by the compressor 6 . The evaporator 9 is arranged on one side of the heat exchange core 10 . Further, the condensed water produced by the compression refrigeration cycle can be used in the phase-change thermal subsystem, and the condensed water receiving tray (not shown) is connected to the water receiving tray 1 of the phase-changing thermal subsystem through pipes, so that the condensed water Can be sent to the water receiving tray 1.

The outdoor air circulation is realized by the condensing fan 5 , and when the condensing fan 5 is working, the outdoor air enters from the outdoor air inlet and is discharged from the outdoor air outlet after passing through the heat exchange core 10 .

The indoor air circulation is realized by the indoor circulating fan 8. When the indoor circulating fan 8 is working, the indoor air enters from the indoor air return port, and is sent out from the indoor air supply port after passing through the heat exchange core 10.

The energy-consuming parts in the composite cooling system of phase-change heat and compression refrigeration of the present invention include: water pump 2, condensing fan 5, compressor 6, and indoor circulation fan 8, among which the energy consumption of the compressor is the largest, thus reducing the compressor's Running time is the key to the system's energy saving goals. The running time of the aforementioned energy-consuming components is as follows: the condensing fan 5 and the indoor circulation fan 8 run around the clock, the water pump 2 runs when the outdoor temperature is higher than the preset value, and when the outdoor air cannot meet the cooling demand after evaporative cooling, the compressor starts Running, for mechanical supplementary refrigeration.

The working principle of the refrigeration system of the present invention is described below:

When the outdoor temperature T≤preset temperature T0, the condensing fan 5 and the indoor circulation fan 8 work, and the outdoor and indoor air circulation is started, and the outdoor circulating air and the indoor circulating air exchange full sensible heat at the heat exchange core 10, Realize the temperature control of the computer room.

When the outdoor temperature T is within a certain range: T0≤T≤T1, the condensation fan 5, the indoor circulation fan 8 and the water pump 2 work, and the outdoor air circulation, indoor air circulation and cooling water circulation are turned on, and the spray pipe 3 starts to spray cooling water. The dry-bulb temperature of the air is reduced by the evaporation of the cooling water, and the cooled air and the indoor circulating air perform full sensible heat exchange at the heat exchange core 10, and the non-evaporated cooling water is recycled to the water receiving tray 1 for reuse.

When the outdoor temperature T≥T1, the condensing fan 5, the indoor circulating fan 8, the water pump 2 and the compressor 6 all work, and the outdoor air circulation, indoor air circulation, cooling water circulation and refrigerant circulation are turned on, and the spray pipe 3 starts to spray cooling water. After the cooled outdoor air and the indoor circulating air perform full sensible heat exchange at the heat exchange core 10, the refrigerant in the condenser 4 continues to be cooled, and the non-evaporated cooling water is recycled to the water receiving tray 1, and the indoor air Heat exchange is performed at the heat exchange core 10 , and after a part of the heat is taken away by the outdoor air circulation, further heat exchange is performed with the refrigerant at the evaporator 9 . The preset temperatures T0 and T1 in the above description are temperature state nodes calculated according to the ambient temperature and humidity. When the environment and space conditions change, the preset temperatures will also change accordingly.

Example 2

As shown in Figure 2, the difference between this embodiment and Embodiment 1 is that there are two heat exchange cores 10, and the phase-change thermal subsystem includes two sets of water receiving trays 1, water pumps 2 and spray pipes 3, each The connection mode of a group of water receiving trays, water pumps and spray pipes is the same as that of Embodiment 1. There are two condensers 4 and condensing fans 5 in the compression refrigeration subsystem, the condensing fans 5 and the condensers 4 are arranged correspondingly, and the compressor 6 is a variable frequency compressor. The compressor 6 provides refrigerant circulation for two sets of condensers and one set of evaporators, and the indoor air circulation is realized by an indoor circulating fan. When the outdoor air passes through the heat exchange core 10, it exchanges heat with the indoor air, and then is discharged from the outdoor air outlet, and the cooled indoor air is sent out from the indoor air outlet.

Example 3

As shown in Figure 3, the difference between this embodiment and Embodiment 2 is that there are two evaporators 9 in the compression refrigeration subsystem, the indoor circulation fan 8 is set corresponding to the number of evaporators 9, and the condensing fan 5 is set in the indoor At the outlet. Compressor 6 provides refrigerant circulation for two groups of evaporators and one group of condensers, and indoor air circulation is realized by two indoor circulation fans. The outdoor air exchanges heat with the indoor air when passing through the heat exchange core 10, and then is discharged from the outdoor air outlet, and the cooled indoor air is sent out from the indoor air outlet.

In addition, the phase change thermal subsystem of the present invention can also be a wet film evaporative cooling system. When using wet film evaporative cooling, the phase change thermal subsystem also includes a wet film, and the wet film is arranged on the outdoor air circulation path Before the heat exchange core, that is, the wet film is arranged upstream of the heat exchange core, which can be located above or in front of the heat exchange core. The air passes through the wet film first and then through the heat exchange core. The tray is set under the wet film, and the water in the water receiving tray is directly sprayed onto the wet film. When the air passes through the wet film, heat can be exchanged, thereby reducing the temperature.

The phase change heat subsystem of the utility model has two forms, one is to cool down the outdoor air by spraying cooling water on the outside of the heat exchange core, and then the indoor and outdoor air passes through the heat exchange core for heat exchange. There is only one device for the heat exchange core; the other is that the outdoor air is humidified and cooled at the wet film, and then exchanges heat with the indoor air through the heat exchange core. At this time, there are two devices: the wet film and the heat exchange core.

The refrigeration system of the utility model can be applied to the northern region, adopting natural cooling sources all-weather, which not only avoids the influence of dust, sulfide and other harmful substances in the fresh air on the equipment in the equipment room, but also reduces the investment in mechanical cooling capacity, greatly reducing the cost of equipment in the equipment room. Operating costs. For example, in the Beijing area, the annual energy saving rate can be as high as 40%, and the mechanical cooling capacity of supplementary cooling only accounts for 35% to 60% of the total cooling capacity, which also greatly reduces the initial investment cost.

Compared with the prior art, the indoor air and outdoor air of the refrigeration system of the utility model exchange heat through the heat exchange core, and the internal and external air are isolated to ensure the air quality in the data center; cooling water can be used to assist cooling, and the cooling water can be sprayed directly On the outdoor air, evaporative cooling is realized, and the indoor circulating air inside the heat exchange core is cooled, and the unevaporated water flows into the water receiving tray, and participates in the cycle repeatedly, saving water source; the frequency conversion compressor is used as supplementary refrigeration to further realize energy saving and reduction Row.

Each part in this specification is described in a progressive manner, and each part focuses on the difference from other parts, and the same or similar parts of each part can be referred to each other. The combination relationship between these components is not just the form disclosed in the embodiment, the above description of the disclosed embodiment enables those skilled in the art to realize or use the utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. phase-change heat-exchange and compression refrigeration composite cooling system, it is characterised in that including: phase inversion heater System, compression refrigeration subsystem, outdoor air cycle subsystem and indoor air circulation subsystem；

Described phase-change heat-exchange subsystem includes heat exchange core body, drip tray and flusher, room air and outdoor Air carries out heat exchange at heat exchange core body, described flusher to described heat exchange core body spray water, described in connect Water pond accepts the water through heat exchange core body that flusher sprays, described drip tray and flusher by spraying Waterpipe connects；

Described compression refrigeration subsystem includes condenser, compressor and vaporizer, described condenser and evaporation Device, compressor are by refrigerant tubing circulation connection.

2. phase-change heat-exchange as claimed in claim 1 and compression refrigeration composite cooling system, its feature exists In: outdoor air cycle subsystem includes condensation fan, outdoor air outlet, outdoor air inlet, described condensation Blower fan is arranged on outdoor air circulation canal, and during condensation fan work, outdoor air enters from outdoor air inlet Entering, discharge from outdoor air outlet after heat exchange core body and condenser, forming chamber outer air circulates.

3. phase-change heat-exchange as claimed in claim 1 and compression refrigeration composite cooling system, its feature exists In: indoor air circulation subsystem includes indoor circulation blower fan, indoor air outlet, indoor return air mouth, described Indoor circulation blower fan is arranged on indoor air circulation passage, indoor circulation blower fan work time, room air from Indoor return air mouth enters, and outwards sends, in forming chamber from indoor air outlet after heat exchange core body and vaporizer Air circulates.

4. phase-change heat-exchange as claimed in claim 1 and compression refrigeration composite cooling system, its feature exists In: described flusher includes spray line and is arranged at the water pump on spray water pipeline, described spray line with Spray water pipeline is connected and is arranged at above described heat exchange core body, and flusher is by pipeline and outside moisturizing system System is connected.

5. the phase-change heat-exchange as described in claim 1 or 4 and compression refrigeration composite cooling system, its feature It is: described phase-change heat-exchange subsystem also includes that wet film, described wet film are arranged on flow of outside air path Before heat exchange core body, described spray line is arranged at the top of wet film, and described drip tray is arranged under wet film Side.

Phase-change heat-exchange the most according to claim 1 and compression refrigeration composite cooling system, its feature exists In: described phase-change heat-exchange subsystem includes least one set drip tray and flusher.

Phase-change heat-exchange the most according to claim 6 and compression refrigeration composite cooling system, its feature exists In: the quantity of described indoor circulation blower fan is one or more.

Phase-change heat-exchange the most according to claim 6 and compression refrigeration composite cooling system, its feature exists In: the quantity of described vaporizer is one or more.

Phase-change heat-exchange the most according to claim 6 and compression refrigeration composite cooling system, its feature exists In: the quantity of described condenser and condensation fan is one or more.

10., according to the phase-change heat-exchange described in claim 1 or 4 and compression refrigeration composite cooling system, it is special Levy and be: the condensed water that described compression refrigeration subsystem produces is delivered in described drip tray by pipeline.