Multi-connected dual-power natural cooling air conditioner

Abstract

The utility model discloses a multi-connected dual-power natural cooling air conditioner which comprises an indoor unit and an outdoor unit. The indoor unit comprises a compressor, a compression air conditioner evaporator, a heat pipe air conditioner evaporator and an electronic expansion valve. The outdoor unit comprises a cooling fan, a compression air conditioner condenser and a heat pipe air conditioner condenser. The air outlet end of the heat pipe air conditioner evaporator is connected with the air inlet end of the heat pipe air conditioner condenser through a second connecting air pipe. The heat pipe air conditioner condenser is connected with the heat pipe air conditioner evaporator through a second connecting liquid pipe; the indoor unit and the outdoor unit are further internally provided with a traditional compression air conditioner for connection. The installation position of the outdoor unit is higher than that of the indoor unit. According to the multi-connected dual-power natural cooling air conditioner, when the outdoor temperature is lower than the indoor temperature, the heat pipe circulation refrigeration can be started, so that the starting time of the compressor is shortened, an outdoor natural cold source is indirectly utilized, the energy consumption of the air conditioner is greatly reduced, and the service life of the air conditioner is greatly prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of energy-saving air-conditioning system design, in particular to a multi-connected dual-power natural cooling air-conditioning. Background Art

[0002] As the construction volume of domestic data centers gradually increases, the energy consumption of data centers has also increased rapidly. In 2020, the power consumption of data centers accounted for 2.7% of the total social power consumption. Under the background of national dual carbon, the energy-saving requirements of data centers are getting higher and higher. The latest requirements on October 22, 2021: the power utilization efficiency of newly built large and super-large data centers shall not exceed 1.3. By 2025, the power utilization efficiency of data centers nationwide shall not exceed 1.5 for super-large data centers.

[0003] Data centers have heat loads all year round. In autumn and winter, when the outdoor temperature is lower than the indoor temperature, traditional air conditioners still need to use compressors for cooling.

[0004] In the energy consumption structure of data centers, in addition to server electricity consumption, the second largest energy consumption is the air conditioning and refrigeration system. Therefore, to reduce PUE, we must first start with the refrigeration system. In order to achieve a PUE below 1.3, the energy efficiency of traditional air conditioners can no longer meet the requirements, and energy-saving solutions such as the use of outdoor natural cooling sources are needed. Utility Model Content

[0005] The utility model aims to provide a multi-connected dual-power natural cooling air conditioner. When the outdoor temperature is lower than the indoor temperature, the heat pipe circulation refrigeration can be started to reduce the start time of the compressor, indirectly utilize the outdoor natural cold source, and greatly reduce the energy consumption and service life of the air conditioner.

[0006] To achieve the above-mentioned purpose, the utility model provides a multi-connected dual-power natural cooling air conditioner, including an indoor unit and an outdoor unit; the indoor unit includes a compressor, a compression air conditioning evaporator, a heat pipe air conditioning evaporator and an electronic expansion valve; the outdoor unit includes a heat dissipation fan, a compression air conditioning condenser and a heat pipe air conditioning condenser; the air outlet end of the compression air conditioning evaporator is connected to the air inlet end of the compression air conditioning condenser through a first connecting air pipe, and the compressor is installed between the compression air conditioning evaporator and the compression air conditioning condenser through the first connecting air pipe; the liquid outlet end of the compression air conditioning condenser is connected to the liquid inlet end of the electronic expansion valve through a first connecting liquid pipe, and the air outlet end of the electronic expansion valve is connected to the air inlet end of the compression air conditioning evaporator; the air outlet end of the heat pipe air conditioning evaporator is connected to the air inlet end of the heat pipe air conditioning condenser through a second connecting air pipe; the liquid outlet end of the heat pipe air conditioning condenser is connected to the liquid inlet end of the heat pipe air conditioning evaporator through a second connecting liquid pipe; the installation position of the outdoor unit is higher than the installation position of the indoor unit.

[0007] Preferably, the compression air-conditioning condenser and the heat pipe air-conditioning condenser are tightly fitted and arranged in parallel.

[0008] Preferably, the compression air-conditioning evaporator and the heat pipe air-conditioning evaporator are tightly fitted and arranged in parallel.

[0009] Preferably, the structural form of the indoor unit includes but is not limited to room-level precision air conditioning, row-level precision air conditioning, and rack air conditioning.

[0010] Preferably, the heat pipe air conditioning evaporators of a plurality of the indoor units and the heat pipe air conditioning condensers of the same number of the outdoor units share the same second connecting liquid pipe and second connecting gas pipe.

[0011] Therefore, the utility model adopts the above-mentioned multi-connected dual-power natural cooling air conditioner. When the outdoor temperature is lower than the indoor temperature, the heat pipe circulation refrigeration can be started to reduce the start-up time of the compressor, indirectly utilize the outdoor natural cold source, and greatly reduce the energy consumption and service life of the air conditioner.

[0012] The technical solution of the utility model is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a single-unit working principle diagram of an embodiment of a multi-connected dual-power natural cooling air conditioner of the utility model;

[0014] Figure 2 This is a multi-machine working principle diagram of an embodiment of a multi-connected dual-power natural cooling air conditioner of the utility model;

[0015] Figure 3 It is a three-dimensional structural schematic diagram of a compression air conditioning evaporator and a heat pipe air conditioning evaporator in an embodiment of a multi-connected dual-power natural cooling air conditioning of the utility model;

[0016] Figure 4 It is a side view of a compression air conditioning evaporator and a heat pipe air conditioning evaporator in an embodiment of a multi-connected dual-power natural cooling air conditioner of the utility model.

[0017] Reference numerals

[0018] 1. Indoor unit; 11. Compressor; 12. Compression air conditioning evaporator; 13. Heat pipe air conditioning evaporator; 14. Electronic expansion valve; 2. Outdoor unit; 21. Compression air conditioning condenser; 22. Heat pipe air conditioning condenser; 31. First connecting air pipe; 32. Second connecting air pipe; 41. First connecting liquid pipe; 42. Second connecting liquid pipe. DETAILED DESCRIPTION

[0019] The technical solution of the utility model is further described below through the accompanying drawings and embodiments.

[0020] Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the usual meanings understood by persons with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" and the like mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" and the like are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0021] Embodiment 1

[0022] like Figure 1 As shown, the utility model provides a multi-connected dual-power natural cooling air conditioner, including an indoor unit 1 and an outdoor unit 2. The indoor unit 1 includes a compressor 11, a compression air conditioner evaporator 12, a heat pipe air conditioner evaporator 13 and an electronic expansion valve 14, and the outdoor unit 2 includes a heat dissipation fan, a compression air conditioner condenser 21 and a heat pipe air conditioner condenser 22.

[0023] The air outlet of the compression air conditioning evaporator 12 is connected to the air inlet of the compression air conditioning condenser 21 through the first connecting air pipe 31, and the compressor 11 is installed between the compression air conditioning evaporator 12 and the compression air conditioning condenser 21 through the first connecting air pipe 31. The liquid outlet of the compression air conditioning condenser 21 is connected to the liquid inlet of the electronic expansion valve 14 through the first connecting liquid pipe 41, and the air outlet of the electronic expansion valve 14 is connected to the air inlet of the compression air conditioning evaporator 12.

[0024] The cycle of the compressor air-conditioning refrigerant is as follows: the high-temperature and high-pressure refrigerant gas discharged from the compressor 11 through the compression air-conditioning evaporator 12 is discharged into the outdoor compression air-conditioning condenser 21 through the first connecting air pipe 31, and becomes a medium-high temperature refrigerant liquid after condensation, and becomes a low-temperature and low-pressure refrigerant gas-liquid mixture after throttling by the electronic expansion valve 14, and enters the compression air-conditioning evaporator 12 to exchange heat with the air, and the refrigerant absorbs heat and evaporates to become a gaseous refrigerant that enters the compressor 11, and the cycle continues.

[0025] The air outlet of the heat pipe air conditioning evaporator 13 is connected to the air inlet of the heat pipe air conditioning condenser 22 through the second connecting air pipe 32 , and the liquid outlet of the heat pipe air conditioning condenser 22 is connected to the liquid inlet of the heat pipe air conditioning evaporator 13 through the second connecting liquid pipe 42 .

[0026] The cycle of the heat pipe air conditioner refrigerant is as follows: the refrigerant in the heat pipe air conditioner evaporator 13 absorbs the heat of the air, evaporates and rises to the outdoor heat pipe air conditioner condenser 22. When the outdoor temperature is lower than the indoor temperature, the refrigerant condenses into liquid refrigerant on the outdoor side, and flows back to the heat pipe air conditioner evaporator 13 by gravity formed by the height difference, and the cycle continues. The heat pipe cycle needs to be started only when there is a temperature difference between indoors and outdoors, and the outdoor temperature needs to be lower than the indoor temperature. The greater the temperature difference, the better the heat exchange effect. When the temperature difference reaches a certain value, heat pipe refrigeration can completely replace compressor refrigeration.

[0027] According to the above principle, the installation height of the outdoor unit 2 must be higher than that of the indoor unit 1 so that the refrigerant of the heat pipe air conditioner can flow back to the indoor unit 1 by gravity.

[0028] The compression air conditioning condenser 21 and the heat pipe air conditioning condenser 22 are tightly fitted and arranged in parallel, and the heat dissipation fan is installed on one side. This design can make full use of the space of the outdoor unit 2, making the internal structure of the outdoor unit 2 more compact, so as to reduce the floor space of the outdoor unit 2.

[0029] Similarly, if Figure 3 and Figure 4 As shown, the compression air conditioning evaporator 12 and the heat pipe air conditioning evaporator 13 are closely fitted and arranged in parallel, which also reduces the space required by the indoor unit 1 as much as possible, making the indoor unit 1 more compact, and also reduces the number of fans used in the indoor unit 1, which can further reduce the manufacturing cost.

[0030] The structural forms of the indoor unit 1 include, but are not limited to, room-level precision air conditioners, row-level precision air conditioners, and rack air conditioners.

[0031] like Figure 2 As shown, when there are two or more indoor units 1, the heat pipe air conditioning evaporators 13 of all indoor units 1 and the heat pipe air conditioning condensers 22 of the same number of outdoor units 2 share the same second connecting liquid pipe 42 and second connecting air pipe 32, which can reduce pipeline investment and construction costs.

[0032] Therefore, the utility model adopts the above-mentioned multi-connected dual-power natural cooling air conditioner. When the outdoor temperature is lower than the indoor temperature, the heat pipe circulation refrigeration can be started to reduce the start-up time of the compressor, indirectly utilize the outdoor natural cold source, and greatly reduce the energy consumption and service life of the air conditioner.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that they can still modify or replace the technical solution of the utility model with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the utility model.

Claims

1. A multi-connected dual-power natural cooling air conditioner, characterized in that: It comprises an indoor unit and an outdoor unit; the indoor unit comprises a compressor, a compression air-conditioning evaporator, a heat pipe air-conditioning evaporator and an electronic expansion valve; the outdoor unit comprises a heat dissipation fan, a compression air-conditioning condenser and a heat pipe air-conditioning condenser; the air outlet end of the compression air-conditioning evaporator is connected to the air inlet end of the compression air-conditioning condenser through a first connecting air pipe, and the compressor is installed between the compression air-conditioning evaporator and the compression air-conditioning condenser through the first connecting air pipe; the liquid outlet end of the compression air-conditioning condenser is connected to the liquid inlet end of the electronic expansion valve through a first connecting liquid pipe, and the air outlet end of the electronic expansion valve is connected to the air inlet end of the compression air-conditioning evaporator; the air outlet end of the heat pipe air-conditioning evaporator is connected to the air inlet end of the heat pipe air-conditioning condenser through a second connecting air pipe; the liquid outlet end of the heat pipe air-conditioning condenser is connected to the liquid inlet end of the heat pipe air-conditioning evaporator through a second connecting liquid pipe; the installation position of the outdoor unit is higher than the installation position of the indoor unit.

2. A multi-connected dual-power natural cooling air conditioner according to claim 1, characterized in that: The compression air-conditioning condenser and the heat pipe air-conditioning condenser are tightly fitted and arranged in parallel.

3. A multi-connected dual-power natural cooling air conditioner according to claim 1, characterized in that: The compression air-conditioning evaporator and the heat pipe air-conditioning evaporator are closely fitted and arranged in parallel.

4. A multi-connected dual-power natural cooling air conditioner according to claim 1, characterized in that: The structural forms of the indoor unit include but are not limited to room-level precision air conditioners, row-level precision air conditioners, and rack air conditioners.

5. The multi-connected dual-power natural cooling air conditioner according to claim 1, characterized in that: The heat pipe air conditioning evaporators of a plurality of indoor units and the heat pipe air conditioning condensers of the same number of outdoor units share the same second connecting liquid pipe and second connecting gas pipe.

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