WO2011137855A1

WO2011137855A1 - Energy-saving device for air conditioner outdoor unit and method thereof

Info

Publication number: WO2011137855A1
Application number: PCT/CN2011/075044
Authority: WO
Inventors: 黄文雄; 孔小明
Original assignee: 华为技术有限公司
Priority date: 2010-08-16
Filing date: 2011-05-31
Publication date: 2011-11-10
Also published as: CN101907324B; CN101907324A; US20130139534A1

Abstract

An energy-saving device for an air conditioner outdoor unit and the method thereof are disclosed. The energy-saving device includes: a water mist generator (301), which is installed in opposite to an air inlet of the air conditioner outdoor unit for atomizing water to generate water mist, thereby sending the generated water mist to the air conditioner outdoor unit along with external air flow; a water circulating system (302), which is connected with the water mist generator (301) and an external water source to supply water for the water mist generator (301); and a controller (303), which is connected with the water circulating system (302) for controlling working conditions of the water circulating system (302) according to the monitored results of air inlet temperature of a condenser of the air conditioner outdoor unit and refrigerant evaporating pressure, so as to start and stop generating the water mist.

Description

The invention claims to be submitted to the Chinese Patent Office on August 16, 2010, and the application number is 201010255556. 7 , the invention titled "Energy-saving device for air conditioner outdoor unit and energy-saving method" Chinese patent application Priority is hereby incorporated by reference in its entirety. TECHNICAL FIELD The present invention relates to the field of air conditioning energy saving technologies, and in particular, to an energy saving device and an energy saving method for an outdoor unit of an air conditioner. BACKGROUND OF THE INVENTION Existing CO (Centra l off ice, Central Computer Room) / DC (Data Centre) equipment rooms have been increasing in power consumption density, and the demand for refrigeration is increasing. More air conditioners need to be installed to dissipate heat. However, due to the limitation of the layout space, the outdoor unit of the air conditioner is densely installed, and the arrangement interval is continuously reduced. The problem of "hot air crosstalk" of the outdoor unit often occurs, which causes the air temperature of the air inlet of the air conditioner outdoor unit to be too high, which seriously affects the performance of the air conditioning refrigeration performance. It is not conducive to energy-saving operation of the refrigeration system.

Moreover, due to the unreasonable design of some computer rooms, the outdoor unit installation area often faces south or west, which causes the outdoor unit to be exposed to the sun during hot summer days. The air temperature at the air inlet of the air conditioner outdoor unit is too high, which seriously reduces the heat dissipation efficiency of the outdoor unit. , adversely affect the operational reliability of indoor ICT (Information and Communication Technology) equipment.

1 is a schematic view showing the installation position of the existing air conditioning system. As shown in FIG. 1, the indoor host is connected to the outdoor condenser, and the condensing agent of the outdoor condenser continuously evaporates by absorbing heat in the indoor air, so that the indoor air temperature is lowered, and The cooled air is supplied through the air outlet of the indoor host.

2 is an air conditioning heat dissipation system used in the prior art, and the prior art uses the following scheme. In order to solve the problem that the airflow temperature of the air inlet of the air conditioner outdoor unit is too high, the cooling efficiency is low, and the energy consumption of the refrigeration system is not conducive: a latent heat transition energy-saving device is added to the air inlet of the condenser of the air conditioner outdoor unit, and the device includes an evaporating wet curtain, Pressurized fan and piping system. Water is supplied to the wet curtain through the piping system, and the temperature of the air passing through the device is lowered by the principle of water evaporation and heat absorption, and the used water is drained by the sewage pipe.

As shown in FIG. 2, the system specifically includes the following parts: air-cooled air conditioner host 1, condensing fan 2, air-cooled air conditioner host condenser 4, pressure fan 5, water distribution pipe 6, evaporating wet curtain 7, circulating water pipe 8 The external hot air 9, the water tank 10, the water pump 11, the hydrating float 12, the connecting bracket 13 and the air inlet area 14. The device can reduce the temperature of the air inlet of the condenser of the air conditioner outdoor unit by 6_8 °C, thereby improving the efficiency of air conditioning cooling and saving energy consumption.

1) Because the scheme uses wet curtains, it significantly increases the airflow resistance of the system. It is necessary to increase the wind turbine to overcome the resistance. While increasing the system material cost (fan), it also increases the operating cost (fan operating electricity bill);

2) Since the spray port of the solution is located above the evaporating wet curtain, this extensive spray method will prevent a lot of water from actually spraying onto the wet curtain, which is not conducive to saving water resources.

Summary of the invention

In order to solve the above-mentioned deficiencies of the prior art, an embodiment of the present invention provides an energy-saving device for an outdoor unit of an air conditioner and an energy-saving method, wherein the device uses a water mist generated by a water mist generator to cool the outdoor unit of the air conditioner, and raises the spray of the outdoor unit. The effect, and by controlling the inlet air temperature and the refrigerant evaporation pressure to control the generation of water mist, further saves energy.

In one aspect, an embodiment of the present invention provides an energy-saving device for an outdoor unit of an air conditioner, wherein the device includes: a water mist generator disposed opposite to an air inlet of the outdoor unit of the air conditioner to atomize water to generate water mist, so that the generated water is generated. The mist enters the air conditioner outdoor unit with the outside airflow; the water circulation system, the connection The water mist generator and the external water source provide the water mist generator with water required for atomization; the controller is connected to the water circulation system, according to the air inlet temperature and the refrigerant evaporation pressure of the air conditioner outdoor unit condenser The monitoring result controls the working state of the water circulation system to realize the generation and stop of water mist.

In another aspect, the embodiment of the present invention further provides an energy-saving method for an outdoor unit of an air conditioner, the method comprising: detecting an air inlet temperature and a refrigerant evaporation pressure of an air conditioner outdoor unit condenser; The monitoring result of the evaporation pressure of the agent controls the working state of the water circulation system to realize the generation and stop of the water mist; the water circulation system is used for connecting the water mist generator and the external water source, and providing the atomization device for the water mist generator The water mist generator is disposed opposite to the air inlet of the air conditioner outdoor unit, and atomizes the water to generate a water mist, so that the generated water mist enters the air conditioner outdoor unit according to the external airflow.

The device of the embodiment of the invention cools the outdoor unit by using a water mist generator, thereby improving the spraying effect; no additional fan is needed, which saves cost; and the timing of the spraying is controlled, thereby further saving energy. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view showing a mounting position of a conventional air conditioning system;

2 is a structural diagram of a conventional air conditioning heat dissipation system including the latent heat transition energy saving device; FIG. 3 is a functional block diagram of an energy saving device for an air conditioner outdoor unit according to an embodiment of the present invention; FIG. 5 is a structural view of a device according to an embodiment of the present invention when the air conditioner outdoor unit is installed vertically; FIG. 6 is a structure of a double-side spray type water mist generator according to an embodiment of the present invention; Figure

Figure 6a is a schematic view of the injection of the double-side spray type water mist generator;

Figure 7 is a structural view of a point spray type water mist generator according to an embodiment of the present invention;

Figure 7a is a schematic view of the injection of a point spray type water mist generator;

FIG. 8 is an overall flow chart of an energy saving method for an outdoor unit of an air conditioner according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention provide an energy-saving device and an energy-saving method for an outdoor unit of an air conditioner, which sprays an outdoor unit with a water mist generator, and adopts an air inlet temperature and a refrigerant evaporation pressure of an air conditioner outdoor unit condenser. Monitoring, controlling the occurrence of water mist, reducing the temperature of the condenser inlet through the water mist, thereby improving the heat dissipation performance of the air conditioner outdoor unit in a high temperature environment, achieving the purpose of improving the air conditioning refrigeration efficiency and saving the running energy consumption.

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is a partial embodiment of the invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

The embodiment of the present invention provides an energy-saving device for an outdoor unit of an air conditioner, and FIG. 3 is a functional block diagram of an energy-saving device for an air conditioner for an air conditioner according to an embodiment of the present invention. As shown in Figure 3, the device includes:

The water mist generator 301 is disposed opposite to the air inlet of the air conditioner outdoor unit, and atomizes the water to generate a water mist, so that the generated water mist enters the air conditioner outdoor unit according to the external airflow;

The water circulation system 302 connects the water mist generator 301 and the external water source to supply the water mist generator 301 with water required for atomization;

The controller 303 is connected to the water circulation system 302 to control the working state of the water circulation system 302 according to the monitoring result of the air inlet temperature of the condenser of the air conditioner and the evaporation pressure of the refrigerant to realize the generation and stop of the water mist.

Specifically, the device further includes: a temperature detecting unit 304 disposed at an air inlet of the condenser of the outdoor unit of the air conditioner for detecting the temperature of the air inlet; and a pressure detecting unit 305 disposed in the condenser of the outdoor unit of the air conditioner for detecting the cooling The agent evaporates pressure.

Specifically, the controller 303 is further connected to the temperature detecting unit 304 and the pressure detecting unit 305. When the temperature value of the temperature monitoring point is TT _H > 0 or the pressure value of the pressure monitoring point PP _H > 0, the water is started. Pump; when TT _H T. And PP _H P. Stop the pump operation; where T _H is the set temperature and P _H is the set pressure, T. Back to temperature, P. Back pressure.

The typical scenarios of the energy-saving device for the outdoor unit of the air conditioner of the present embodiment are mainly the following two types: the horizontal installation of the air conditioner for the outdoor unit and the vertical installation of the outdoor unit of the air conditioner. The specific structure of the device in the two installation modes will be described in detail below.

1) Horizontal installation of air conditioner outdoor unit

When the air conditioner outdoor unit is installed in a horizontal manner, the structure of the device in the embodiment of the present invention is as shown in FIG. In this application scenario, the water mist generator and the water tank are located below the air inlet of the air conditioner outdoor unit, and the water mist generator is located between the air inlet and the water tank, and the external hot air passes through the water mist generator and enters the air conditioning room.

As shown in FIG. 4, the water circulation system of the embodiment includes: a water tank disposed under the water mist generator to connect with an external water source, and collect water droplets leaking from the condenser of the outdoor unit to realize water recycling; The water mist generator and the controller are controlled by the controller to supply the water in the water tank to the water mist generator. Optionally, the water tank further includes a water replenishing buoy for automatically replenishing the external water source. The working principle of the water replenishing buoy is similar to that of the household toilet water tank. When the water level drops, the buoy opens the water inlet valve; when the water level reaches a certain height After that, the inlet valve closes. Since the technology itself is a mature technology, the description will not be repeated here.

The working principle of the apparatus of this embodiment is that the water mist generator is connected to the water circulation system, and the water in the water tank is sent to the water mist generator by the water pump, and then the water mist generator atomizes the water. Due to the suction effect of the air conditioner outdoor unit with the fan system, the vicinity of the water mist generator is a negative pressure zone, and the water mist enters the outdoor unit under the carrying action of the air flow. When passing through the outdoor machine condenser, the evaporation of the water mist absorbs heat. Dissipate heat from the condenser system of the outdoor unit.这种This method of water mist evaporation can significantly reduce the temperature of the outside hot air (about 8_12 °C), thus improving the heat dissipation of the outdoor unit of the air conditioner and improving its cooling efficiency.

The water tank of the embodiment is connected to the external tap water system, and the water supply is automatically replenished by the water replenishing buoy, and the water droplets leaking from the condenser of the outdoor unit are collected and recycled. In order to protect The spray water return process will not pollute the water system in the water tank. A layer of filter screen can be laid on the upper part of the water tank, and the water system in the water tank needs to be cleaned regularly (for example: every time 700h, a non-oxidizing detergent 805A is thrown. deal with) ;

In order to ensure the efficient and efficient heat dissipation of the outdoor unit while reducing the running cost, it is necessary to finely control the running time of the pump. Since the heat dissipation efficiency of the outdoor unit is limited by the air temperature of the air inlet and the evaporation pressure of the refrigerant, the controller of the embodiment realizes the real-time occurrence of water mist by monitoring the inlet air temperature and the refrigerant evaporation pressure of the outdoor unit of the air conditioner. Control, save power consumption of pump operation.

2) Air conditioner outdoor unit for vertical installation

When the air conditioner outdoor unit is installed vertically, the installation structure of the device of the present invention is as shown in FIG. In this application scenario, the water mist generator and the water tank are arranged in front of the air inlet of the air conditioner outdoor unit, and the external hot air passes through the water mist generator and enters the air conditioner outdoor unit. The other structure is the same as the horizontal installation and will not be described here.

The water mist generator is a key module of the embodiment of the present invention. The present embodiment provides two specific implementation manners, and the two implementation manners can be applied to the foregoing vertical installation structure and the bedroom installation structure:

(a) double-sided spray

As shown in Fig. 6, by providing water mist injection holes on both sides of the water mist generator, each injection hole is connected to the water circulation system via a water delivery pipe to realize the spray emission of the water mist, forming water in the water mist generator plane. Fog curtain. Alternatively, in order to make the water mist particles smaller, it is possible to spray with a fine spray hole. The advantage of the double-side spray type water mist generator is that the water column collides with each other to form fine water particles, which is more conducive to evaporative heat dissipation. Therefore, the structure can enhance the gasification and suction of the water mist while reducing the airflow through the water curtain curtain resistance. The heat capacity significantly reduces the airflow temperature at the air inlet of the air conditioner outdoor unit. At the same time, the atomized water vapor can be more conveniently carried by the air and sent to the vicinity of the condenser of the outdoor unit of the air conditioner to improve the heat dissipation effect of the condenser. Taking the vertical installation as an example, Fig. 6a is a schematic view of the injection of the double-side spray type water mist generator, wherein the direction of the arrow is the direction of the water mist spray. (b) spotted spray

As shown in Fig. 7, by providing a water mist injection port on the surface of the water mist generator, each injection port is connected to the circulating water pipe system through the water delivery pipe to realize vertical hemispherical surface injection of the water mist, in the water mist generator. A water curtain is formed between the surface and the air inlet of the air conditioner outdoor unit. Alternatively, in order to make the water mist particles smaller, it is possible to spray with a fine spray hole. Compared with the double-side spray mist generator, the point jet type has the advantage of reducing the resistance to the fan. Therefore, the structure enhances the mist of the water mist while reducing the resistance of the airflow through the curtain of the water mist curtain. The heat absorption capacity significantly reduces the airflow temperature of the air inlet of the air conditioner outdoor unit. At the same time, the atomized water vapor can be more conveniently carried by the air and sent to the vicinity of the condenser of the outdoor unit of the air conditioner to improve the heat dissipation effect of the condenser. Taking a vertical installation as an example, Fig. 7a is a schematic view of the injection of a point-like spray type water mist generator in which the direction of the arrow is the direction in which the water mist is sprayed.

The embodiment also provides an energy saving method for the outdoor unit of the air conditioner, and FIG. 8 is an overall flow chart of the method. As shown in FIG. 8, the method includes:

S80 detects the air inlet temperature and the refrigerant evaporation pressure of the air conditioner outdoor unit condenser;

S802, according to the monitoring result of the air inlet temperature of the condenser of the air conditioner and the evaporation pressure of the refrigerant, controlling the working state of the water circulation system to realize the generation and stop of the water mist; wherein the water circulation system is used for connecting the water mist generator and the external water source, The water mist generator is provided with water required for atomization; the water mist generator is disposed opposite to the air inlet of the air conditioner outdoor unit, and atomizes the water to generate water mist, so that the generated water mist enters the air conditioner outdoor unit according to the external airflow. .

Specifically, the S802 includes: obtaining a monitoring result of the air inlet temperature and the refrigerant evaporation pressure of the air conditioner outdoor unit condenser; when the temperature monitoring point temperature value T-TH > 0 or the pressure monitoring point pressure value P-PH > 0, Start the pump operation of the water circulation system; when T-T1 T0 and P-P1 P0, stop the pump operation; where TH is the set temperature, PH is the set pressure, TO is the return temperature, and P0 is the return pressure.

The apparatus and method of the embodiments of the present invention can achieve the following beneficial technical effects:

1) The device adopts modular design and has wide adaptability. It can be applied to traditional air-cooled air-conditioned rooms. Energy-saving transformation of external machines;

2) The device and method control the timing of the spraying, and do not need an additional fan, which reduces the production cost and operating cost of the energy-saving system, that is, reduces the total cost of ownership (TC0);

3) The water tank in the device can also collect water droplets leaking from the condenser to realize water recycling and save water source;

4) The device and method use refined operation management technology to improve the spray effect of the outdoor unit, and improve the COP (Coefficient of Performance) of CRAC (Computer Room Air Conditioner) while saving water. Resource consumption; 5) The structure of the device can reduce the installation constraints of the air conditioner outdoor unit energy-saving system and expand its application range.

In summary, compared with the conventional air conditioner outdoor unit energy-saving device, the device of the embodiment of the invention has low investment cost (CapEx, Capital Expenditure), low operating cost (OpEx, Operating Expense), small occupied space, and flexible arrangement. It has the advantages of convenient operation, remarkable energy saving and emission reduction effects.

The water mist generator of the embodiment of the invention can also be arranged near the exhaust vent of the CRAC outdoor unit, and absorb the hot air flow energy discharged by the outdoor unit through the spray, reduce the exhaust air temperature of the outdoor unit, and improve the environmental impact of the outdoor unit exhaust. At the same time, the heated water vapor can be recycled and reused, such as: civil fields (hand washing, bathing, laundry, hot water heating, etc.) to further improve energy utilization efficiency.

A person skilled in the art can understand that all or part of the process of implementing the above embodiment method can be completed by a computer program to instruct related hardware, and the program can be stored in a computer readable storage medium, the program In execution, the flow of an embodiment of the methods as described above may be included. The storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM). The embodiments of the present invention are described in detail with reference to the foregoing embodiments. Those skilled in the art should understand that the technical solutions described in the foregoing embodiments may be modified, or some of the technical features may be equivalently replaced. The modifications and substitutions of the present invention do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

Rights request

An energy-saving device for an outdoor unit of an air conditioner, characterized in that: the device comprises: a water mist generator disposed opposite to an air inlet of the outdoor unit of the air conditioner, atomizing the water to generate a water mist, so that the generated water mist is The outside airflow enters the outdoor unit of the air conditioner;

a water circulation system connecting the water mist generator and an external water source to supply the water mist generator with water required for atomization;

The controller is connected to the water circulation system, and controls the working state of the water circulation system according to the monitoring result of the inlet air inlet temperature and the refrigerant evaporation pressure of the air conditioner outdoor unit to realize the generation and stop of the water mist.

2. The device according to claim 1, wherein the water mist generator comprises: an injection hole disposed on both sides of the water mist generator, and outlets of the double side injection holes are oppositely disposed, each of the injection holes The water circulation system is connected to the water circulation system via a water delivery pipe to realize the spray emission of the water mist, and a water curtain is formed on the surface of the water mist generator.

3. The device according to claim 1, wherein the water mist generator comprises: a plurality of water mist injection ports, each of which is connected to the water circulation system via a water delivery pipe to realize a water mist direction The air inlet is sprayed in a vertical hemispherical shape to form a water mist curtain between the surface of the water mist generator and the air inlet of the air conditioner outdoor unit.

4. The apparatus according to claim 1, wherein the water circulation system comprises: a water tank disposed under the water mist generator, connected to an external water source, and collecting water droplets leaking from the condenser of the outdoor unit To achieve water recycling;

A water pump, connected to the water tank, a water mist generator, and the controller, is controlled by the controller to supply water in the water tank to the water mist generator.

The device according to claim 1, wherein the device further comprises: a temperature detecting unit disposed at an air inlet of the condenser of the outdoor unit of the air conditioner for detecting a temperature of the air inlet;

a pressure detecting unit disposed in a condenser of the outdoor unit of the air conditioner for detecting the refrigerant Evaporation pressure

The controller is further connected to the temperature detecting unit and the pressure detecting unit, and when the detected temperature value TT _H > 0 or the detected pressure value PP _H > 0, the water pump is started; when TT _H T . And PP _H P. Stop the pump operation; where: T _H is the set temperature and P _H is the set pressure, τ. Back to the temperature, oh. Back pressure.

6. The apparatus according to claim 4, wherein the water mist generator is located below the air inlet of the air conditioner outdoor unit when the outdoor unit of the air conditioner is installed horizontally.

7. The apparatus according to claim 4, wherein the water mist generator is located in front of the air inlet of the air conditioner outdoor unit when the outdoor unit of the air conditioner is installed vertically.

8. The device according to claim 4, wherein the water tank further comprises a water replenishing buoy for realizing automatic replenishment of the external water source.

9. An energy-saving method for an outdoor unit of an air conditioner, characterized in that: the method comprises: detecting an inlet air inlet temperature and a refrigerant evaporation pressure of an air conditioner outdoor unit;

According to the monitoring result of the air inlet temperature and the refrigerant evaporation pressure of the air conditioner outdoor unit condenser, the working state of the water circulation system is controlled to realize the generation and stop of the water mist; the water circulation system is used for connecting the water mist generator and the external water source, The water mist generator provides water required for atomization; the water mist generator is disposed opposite to the air inlet of the air conditioner outdoor unit, and atomizes water to generate water mist, so that the generated water mist enters with the external airflow. Said air conditioner outdoor unit.

The method according to claim 9, wherein the monitoring of the working state of the water circulation system according to the monitoring result of the air inlet temperature of the condenser of the air conditioner and the evaporation pressure of the refrigerant to realize the generation of water mist And stop includes:

Obtaining the monitoring result of the inlet air inlet temperature and the refrigerant evaporation pressure of the air conditioner outdoor unit; when the monitored temperature value Τ-Τ _Η > 0 or the monitored pressure value Ρ-Ρ _Η > 0, the water pump of the water circulation system is started; Τ-Τ _Η Τ. And Ρ-Ρ _Η Ρ. When the pump is stopped, where: Τ _Η is the set temperature, Ρ _Η is the set pressure, Τ. Back to the temperature, oh. Back pressure.