CN105841270A - Modular energy saving air conditioner - Google Patents

Abstract

Modular energy-saving air conditioner, including a natural cooling source cooling module and a mechanical refrigeration module, and a first modular cabinet and a second modular cabinet used in combination independently of each other; the natural cooling source cooling module includes an indoor air filter, an evaporative cooling heat exchanger and an outdoor circulating fan, the mechanical refrigeration module includes a condenser, an evaporator, a compressor, and an indoor circulating fan, and the condenser, the evaporator, and the compressor are circulated through refrigerant pipelines; The indoor air flow channel and the outdoor air flow channel are isolated from each other, the evaporative cooling heat exchanger has a channel communicating with the indoor air flow channel and the outdoor air flow channel, and the outdoor air and indoor air exchange heat at the evaporative cooling heat exchanger , the evaporator is located at the outlet of the indoor air passage of the first modular cabinet. The invention integrates natural cooling source cooling and mechanical refrigeration, and has good energy-saving effect.

Description

Modular energy-saving air conditioner

technical field

The invention belongs to the technical field of air conditioners, and more specifically relates to an energy-saving air conditioner integrating natural cold source cooling and mechanical refrigeration.

Background technique

As the data center industry industrializes, its business continuity is critical. The demand for market development puts forward new requirements for fast delivery, flexible configuration and rapid expansion of data centers. Modularization of cooling facilities is a necessary condition to meet market demand.

In data centers, the energy consumption of computer room air conditioners accounts for more than 40% of the total energy consumption, accounting for a considerable proportion. Therefore, the energy-saving operation of computer room air conditioners is an important breakthrough point for various operators in energy-saving and emission-reduction actions. The computer room air conditioner has the characteristics of all-weather operation. When the outdoor ambient temperature is low, making full use of natural cooling sources to replace the compressor operation of the traditional computer room air conditioner is an important direction to reduce the energy consumption of the computer room air conditioner.

At present, the computer room cooling adopts compression refrigeration system, fresh air cooling system, direct evaporative cooling system, air heat exchange cooling system or ethylene glycol cooling system and other methods. But there are following deficiencies in practical application:

1. The compression refrigeration system consumes a lot of energy and cannot make full use of the natural cold source, so it does not save energy;

2. Fresh air cooling or direct evaporative cooling or air heat exchange or ethylene glycol cooling is used alone, and the heat transfer is small, which cannot meet the working temperature requirements of the data center computer room;

3. The current units are all standardized complete units, which cannot be combined flexibly and freely, and the transportation and installation are highly dependent on the scheme, so on-site adjustment cannot be realized.

4. Once the cooling system of the computer room is completed, it will be difficult to expand in the future, which hinders the rapid development of the industrialization of the data center industry.

Contents of the invention

The purpose of the present invention is to provide a modular energy-saving air conditioner integrating natural cold source cooling and mechanical refrigeration.

In order to achieve the above object, the present invention takes the following technical solutions:

A modular energy-saving air conditioner, including a natural cooling source cooling module and a mechanical refrigeration module, and a first modular cabinet and a second modular cabinet that are used in combination independently of each other; the natural cooling source cooling module includes an indoor air filter, an evaporative cooling A heater and an outdoor circulation fan, the mechanical refrigeration module includes a condenser, an evaporator, a compressor and an indoor circulation fan, and the condenser, the evaporator, and the compressor are circulated through refrigerant pipelines; the natural cold source cooling module And the condenser in the mechanical refrigeration module is arranged in the first module cabinet, the evaporator, compressor and indoor circulation fan in the mechanical refrigeration module are arranged in the second module cabinet; There are mutually isolated indoor air passages and outdoor air passages, and the evaporative cooling heat exchanger has passages communicating with the indoor air passages and the outdoor air passages, and the outdoor air and indoor air are heated at the evaporative cooling heat exchanger. In exchange, the evaporator is located at the outlet of the indoor air passage of the first modular cabinet.

Further, the indoor air filter is located at the indoor air inlet of the first modular cabinet, the evaporative cooling heat exchanger is arranged behind the indoor air filter on the indoor air circulation path, and the outdoor circulating fan is located on the outdoor air flow path .

Further, the condenser is located on the outflow channel of the outdoor air flow channel, and the outdoor circulation fan is arranged at the outlet of the outdoor air.

Further, the indoor circulation fan is arranged at the indoor air supply port.

Further, the natural cooling source cooling module further includes a spraying device for spraying water to the evaporative cooling heat exchanger, and the spraying device is connected to a spraying water circulation system through a pipeline.

Further, the spraying device is arranged above the evaporative cooling heat exchanger, the condenser is arranged above the spraying device, and the outdoor circulating fan is located above the condenser.

Further, the indoor circulation fan is arranged at the lower part of the second modular cabinet or the upper part of the second modular cabinet.

Further, the natural cooling source cooling module and the mechanical refrigeration module share an indoor circulation fan and an outdoor circulation fan.

Further, the air intake mode of the natural cooling source cooling module is single-side air intake or double-side air intake.

Further, the compressor is a fixed-frequency or variable-frequency compressor.

It can be seen from the above technical solutions that, compared with the prior art, the present invention adopts a modular combination method to achieve rapid expansion, meets the cooling capacity requirements of different data centers in a flexible configuration method, and realizes it by maximizing the use of natural cooling sources for cooling. The purpose of energy-saving operation. The natural cold source cooling system and the mechanical refrigeration system share the indoor fan and the outdoor fan, so the investment is low and the cost is low; if the indirect evaporative cooling system is used, the energy-saving running time can be greatly increased, especially when running in the northern region, only the fan is consuming electricity. Thereby greatly improving the energy saving efficiency.

Description of drawings

In order to illustrate the embodiments of the present invention more clearly, the following will briefly introduce the accompanying drawings used in the descriptions of the embodiments or prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For Those of ordinary skill in the art can also obtain other drawings based on these drawings without making creative efforts.

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

Fig. 2 is the structural representation of embodiment 1 evaporative cooling heat exchanger;

Fig. 3 is the schematic diagram that embodiment 1 module is used in combination;

Fig. 4 is the structural representation of embodiment 2 of the present invention;

Fig. 5 is the schematic diagram that embodiment 2 modules are used in combination;

Figure 6 is a schematic structural view of Embodiment 3 of the present invention;

Figure 7 is a top view of Figure 6;

Fig. 8 is a structural schematic diagram of Embodiment 4 of the present invention

FIG. 9 is a top view of FIG. 8 .

detailed description

Example 1

As shown in Figure 1, the modular energy-saving air conditioner of this embodiment includes an indoor air filter 1, an evaporative cooling heat exchanger 2, an outdoor circulating fan 3, a spraying device 4, a condenser 5, an evaporator 6, a compressor 7, The indoor circulation fan 8 and the cabinet 9, the cabinet 9 includes a first module cabinet 9-1 and a second module cabinet 9-2. Among them, the indoor air filter 1, the evaporative cooling heat exchanger 2, and the outdoor circulation fan 3 form a natural cooling source cooling module, and the condenser 5, evaporator 6, compressor 7, and indoor circulation fan 8 form a mechanical refrigeration module. The natural cold source cooling module and the mechanical refrigeration module are made into independent modules, which are respectively arranged in their respective module cabinets, so as to facilitate corresponding combinations according to the cooling capacity requirements of the machine room, space (such as container) requirements, and natural environment cold source conditions. In this embodiment, as a preferred technical solution, the natural cooling source cooling module further includes a spray device 4, and the heat exchange cooling effect is enhanced through the spray device.

The structure of an independent module is adopted, and the air treatment function is realized after the combination of two modules. The indoor air is processed in the first stage by using the external air in the natural cooling source cooling module, and the indoor air is processed in the second stage in the mechanical refrigeration module, and finally Meet the use requirements. The two modules can be combined in different quantities and in different ways according to needs, and share the indoor circulation fan and the outdoor circulation fan. The natural cooling source cooling module can be a fresh air cooling system, a direct evaporative cooling system, an indirect evaporative cooling system, an air-to-air heat exchange cooling system, an ethylene glycol cooling system, or a heat pipe cooling system, etc. The machine can use fixed frequency or variable frequency compressor.

The directions front and rear in the following descriptions are defined by the direction of air circulation. For example, when the air flows in the horizontal direction, the front and rear positions are also in the horizontal direction. When the air flows in the vertical direction, the front and rear positions are also in the horizontal direction. The position is correspondingly changed to the upper and lower positions in the vertical direction. In the drawings, hollow arrows indicate the direction of indoor air flow, and arrows filled with hatched lines indicate the direction of outdoor air flow. The indoor air filter 1 is set in the first module cabinet 9-1, at the inlet of the indoor air, and the evaporative cooling heat exchanger 2 is located downstream of the indoor air filter 1, that is, the evaporative cooling heat exchanger 2 is set in the indoor air circulation path After installing the indoor air filter 1. An indoor air flow channel and an outdoor air flow channel (not shown) are formed in the first modular cabinet, and the indoor air flow channel and the outdoor air flow channel are isolated from each other. In the channel connected with the channel, the outdoor air and the indoor air exchange heat at the evaporative cooling heat exchanger 2.

Figure 2 is a schematic diagram of the structure of the evaporative cooling heat exchanger in this embodiment. The evaporative cooling heat exchanger includes a number of heat exchange tubes 2-3 arranged at intervals, and the heat exchange tubes 2-3 are arranged between a pair of end plates 2-2. In between, the end plate 2-2 is connected to a pair of opposite side plates 2-1. The indoor air enters the heat exchange tube 2-3 from both ends of the evaporative cooling heat exchanger 2 through the indoor air channel, and circulates in the heat exchange tube 2-3, and the outdoor air flows from the evaporative cooling heat exchanger 2 through the outdoor air channel. The upper or lower side of the tube enters the evaporative cooling heat exchanger 2 and circulates outside the heat exchange tube 2-3.

In this embodiment, a spray device 4 is arranged above the evaporative cooling heat exchanger 2, and the spray device 4 is connected to a spray water circulation system (not shown) through a pipeline, and the spray water circulation system provides cooling water to it, and the water Spray onto the evaporative cooling heat exchanger 2. The spray water circulation system includes a water pump connected by pipes, a water receiving tray and an external supply water source, and the water receiving tray is located below the evaporative cooling heat exchanger 2 . The condenser 5 is located on the outdoor air flow channel. The condenser 5 in this embodiment is arranged above the spray device 4 , the outdoor air outlet is located above the condenser 5 , and the outdoor circulating fan 3 is arranged at the outdoor air outlet.

The evaporator 6, the compressor 7, and the indoor circulation fan 8 are arranged in the second modular cabinet 9-2. The compressor 7, the evaporator 6 and the condenser 5 are connected to each other through the refrigerant circulation pipeline. The evaporator 6 is located at the outlet of the indoor air passage of the first modular cabinet 9-1. The indoor circulating fan 8 of this embodiment is arranged at the second At the indoor air outlet at the lower part of the second-module cabinet, the energy-saving air conditioner is in the downward air supply mode, and the cooled air is sent out from the lower part of the cabinet.

Fig. 3 shows a combination mode of the energy-saving air conditioner in this embodiment. The working process of the energy-saving air-conditioner will be described below in conjunction with Fig. 1 and Fig. 3. The energy-saving air-conditioner of the present invention has three working modes:

1. Pure heat exchange mode: when the outdoor temperature T≤T0, the spray device 4 of the natural cold source cooling module and the compressor 7 of the mechanical refrigeration module do not work, and the indoor circulation fan 8 starts to work, forming a circulating air flow, so that the indoor Hot air enters the first module cabinet 9-1 from the indoor air inlet, and passes through the indoor air filter 1 and the evaporative cooling heat exchanger 2 in sequence. At this time, the outdoor circulating fan 3 also starts to work, drawing in cold air from the external environment , the outdoor cold air enters from the lower part of the first module cabinet 9-1 and flows upward to the evaporative cooling heat exchanger 2, and the indoor hot air and outdoor cold air perform heat exchange at the evaporative cooling heat exchanger 2. After the heat exchange is completed, after cooling The indoor air is sent from the lower part of the second module 9-2 cabinet, and the outdoor air is discharged from the upper air outlet of the first module cabinet 9-1. By matching the air volume of indoor and outdoor circulation, the temperature of the sent air reaches the set value.

2. Indirect evaporative cooling heat exchange: When the outdoor temperature T is within a certain range T0≤T≤T1, the spray device 4 and the indoor circulation fan 8 of the natural cooling source cooling module are both started to work, and the spray device 4 is evaporatively cooled. The heater 2 sprays cooling water, and the indoor hot air enters the first module cabinet 9-1 from the indoor air inlet, and passes through the indoor air filter 1 and the evaporative cooling heat exchanger 2 in turn, and the air drawn in by the outdoor circulation fan 3 The evaporatively cooled air is heat-exchanged, and the temperature of the sent air reaches the set value by matching the air volume of the indoor and outdoor circulation and the water volume of the primary spray.

3. Supplementary indirect evaporative cooling and mechanical refrigeration: when the outdoor temperature T≥T1, the spray device 4 of the natural cooling source cooling module, the compressor 7 of the mechanical refrigeration module and the indoor circulation fan 8 are all turned on, and the hot air in the room passes through The indoor circulation fan 8 is drawn in, and passes through the indoor air filter 1 and the evaporative cooling heat exchanger 2 in sequence, and exchanges heat with the evaporatively cooled air drawn in by the outdoor circulating fan 3 at the evaporative cooling heat exchanger 2, and further passes through The evaporator 6 of the mechanical refrigeration module is cooled, and the outdoor air continues to cool the condenser 5 after passing through the evaporative cooling heat exchanger 2; by matching the air volume of the indoor and outdoor circulation and the amount of sprayed water, the temperature of the sent air reaches set value. 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 Figures 4 and 5, the difference between this embodiment and Embodiment 1 is that the indoor circulation fan 8 is arranged on the top of the second modular cabinet, the energy-saving air conditioner is in the upward air supply mode, and the cooled indoor air is drawn from the upper part of the cabinet. send out.

Example 3

As shown in Figures 6 and 7, the difference between this embodiment and Embodiment 1 is that the indoor air enters from the front side and/or rear side of the first modular cabinet 9-1, enters and evaporates after passing through the indoor air filter 1 The cooling heat exchanger 2 exchanges heat with the outdoor air, and then sends it out from the lower part of the second module cabinet 9-2. Outdoor air enters from the lower part of the first modular cabinet 9-1, and after exchanging heat at the evaporative cooling heat exchanger 2, it is discharged from the upper part of the first modular cabinet 9-1.

Example 4

As shown in Figure 8 and Figure 9, the difference between this embodiment and Embodiment 4 is that the cabinets composed of the first module cabinet 9-1 and the second module cabinet 9-2 are arranged vertically, and the indoor air flows from the first module It enters from the side of the cabinet 9-1 and exits from the lower part of the second module cabinet 9-2.

The present invention adopts a modular method, the mechanical refrigeration module can supply air from the top or bottom, the indoor airflow of the natural cold source cooling module can enter from the left and exit from the right or enter from the right and exit from the left, and the outdoor airflow can enter from the top and exit from the bottom or enter from the bottom and exit from the top , can be single-sided or double-sided air intake, the flexible combination of different modules can meet the cooling needs of different cooling capacity and different conditions, in the computer room with closed cold and hot aisles, the natural cold source cooling module and the mechanical refrigeration module operate as a whole , connected to the indoor hot and cold aisles through air ducts, which can not only meet the layout requirements of the existing traditional computer room, but also meet the layout requirements of the computer room with closed cold and hot aisles.

The natural cooling source cooling module of the present invention uses the natural cooling source to process the indoor air in the first stage, and the mechanical refrigeration module performs the second stage processing on the indoor air through mechanical refrigeration to finally reach the design temperature and humidity. And the two modules can be freely and flexibly configured in different quantities and in different ways according to their environmental conditions, cooling capacity requirements and space structure. The modular setting can achieve the purpose of rapid assembly and realize the rapid expansion and deployment of the data center cooling system.

When the present invention is in use, the indoor air first passes through the cooling module of the natural cooling source, is cooled by the natural cooling source, and then passes through the mechanical refrigeration module, so that the system can maximize the use of the natural cooling source, and the energy saving effect is remarkable. Taking Guiyang area as an example, The COP of a traditional precision air conditioner is 2.8, and the required power is 35.7kW when the cooling capacity is 100kW. However, according to the weather in Guiyang area, the time when the temperature is less than or equal to 25°C exceeds 90%. At this time, when the unit of the present invention is used, the power consumed by the unit is only 6kW when the cooling capacity of 100kW is satisfied.

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 limited to the forms disclosed in the embodiments, and the above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. 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 is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. The modular energy-saving air conditioner is characterized in that: it includes a natural cold source cooling module and a mechanical refrigeration module, and a first modular cabinet and a second modular cabinet that are used in combination independently of each other; The natural cooling source cooling module includes an indoor air filter, an evaporative cooling heat exchanger, and an outdoor circulation fan; the mechanical refrigeration module includes a condenser, an evaporator, a compressor, and an indoor circulation fan, and the condenser, evaporator, The compressor is circulated through the refrigerant pipeline; The natural cold source cooling module and the condenser in the mechanical refrigeration module are arranged in the first module cabinet, and the evaporator, compressor and indoor circulation fan in the mechanical refrigeration module are arranged in the second module cabinet; The indoor air flow channel and the outdoor air flow channel isolated from each other are formed in the first modular cabinet, the evaporative cooling heat exchanger has a channel communicating with the indoor air flow channel and the outdoor air flow channel, and the outdoor air and the indoor air Heat exchange is performed at the evaporative cooling heat exchanger, and the evaporator is located at the outlet of the indoor air passage of the first modular cabinet. 2. The modular energy-saving air conditioner according to claim 1, characterized in that: the indoor air filter is located at the indoor air inlet of the first modular cabinet, and the evaporative cooling heat exchanger is installed indoors on the indoor air circulation path After the air filter, the outdoor circulation fan is located on the outdoor air passage. 3. The modular energy-saving air conditioner according to claim 1, wherein the condenser is located on the outflow channel of the outdoor air flow channel, and the outdoor circulating fan is arranged at the outlet of the outdoor air. 4. The modular energy-saving air conditioner according to claim 1, 2 or 3, characterized in that: the indoor circulation fan is arranged at the indoor air supply port. 5. The modular energy-saving air conditioner according to claim 1, 2 or 3, characterized in that: the natural cooling source cooling module further includes a spray device for spraying water to the evaporative cooling heat exchanger, and the spray The device is connected to the spray water circulation system through pipelines. 6. The modular energy-saving air conditioner according to claim 5, characterized in that: the spray device is arranged above the evaporative cooling heat exchanger, the condenser is arranged above the spray device, and the The outdoor circulation fan is located above the condenser. 7. The modular energy-saving air conditioner according to claim 1, wherein the indoor circulation fan is arranged at the lower part of the second modular cabinet or the upper part of the second modular cabinet. 8. The modularized energy-saving air conditioner according to claim 1, wherein the natural cooling source cooling module and the mechanical refrigeration module share an indoor circulation fan and an outdoor circulation fan. 9. The modular energy-saving air conditioner according to claim 1, wherein the air intake mode of the natural cooling source cooling module is single-side air intake or double-side air intake. 10. The modular energy-saving air conditioner according to claim 1, wherein the compressor is a fixed-frequency or variable-frequency compressor.