CN212253243U

CN212253243U - Air conditioning system

Info

Publication number: CN212253243U
Application number: CN202020941307.2U
Authority: CN
Inventors: 闫健
Original assignee: China United Network Communications Group Co Ltd
Current assignee: China United Network Communications Group Co Ltd
Priority date: 2020-05-28
Filing date: 2020-05-28
Publication date: 2020-12-29
Anticipated expiration: 2030-05-28

Abstract

The utility model discloses an air conditioning system relates to air conditioning technology field, has solved the problem that the heat exchanger of the off-premises station among the correlation technique produced high temperature high pressure and reports an emergency and asks for help or increased vigilance. The air conditioning system comprises a compressor, an indoor heat exchanger, an intermediate heat exchanger, a first circulating pump, a first pipeline shunt and a second pipeline shunt, wherein the compressor, the indoor heat exchanger and the intermediate heat exchanger form a compression refrigeration loop; two ends of the intermediate heat exchanger are respectively connected with a main connecting port of the first pipeline shunt and a main connecting port of the second pipeline shunt through main connecting pipes, and branch connecting ports of the first pipeline shunt and branch connecting ports of the second pipeline shunt are correspondingly connected through a plurality of branch connecting pipes one by one so as to form an auxiliary refrigeration loop; the first circulating pump is arranged on the main connecting pipe, and the branch connecting pipes are buried underground and used for exchanging heat with rock and soil bodies and/or underground water. The utility model is used for air conditioning.

Description

Air conditioning system

Technical Field

The utility model relates to an air conditioning technology field especially relates to an air conditioning system.

Background

With innovation and development of distributed computing architectures such as artificial intelligence, cloud computing and big data, heat dissipation capacity of a machine room is gradually increased. At present, a unit type air conditioning unit is mostly adopted in a machine room, and an outdoor unit of the unit type air conditioning unit dissipates heat in an air cooling mode and is placed on a roof of a top building or mounted on a vertical surface of an outer wall. At this time, due to the limitation of space resources, the outdoor unit is installed more tightly, the heat dissipation space of the outdoor unit is smaller, and a heat island effect is easily formed locally to accumulate heat, thereby affecting the heat dissipation of the unit. Based on this, when the temperature is high in summer, the heat exchanger of the outdoor unit of the unit type air conditioning unit often generates high temperature alarm when in actual operation, and the safe and reliable operation of the system is influenced.

In the prior art, in order to solve the problem of high temperature alarm of a heat exchanger of an outdoor unit of an air conditioner, water is mostly adopted to spray the heat exchanger so as to achieve the purpose of cooling, the heat exchanger of the outdoor unit is easy to corrode and age, and an electric element of the outdoor unit is easy to damage by water inflow, so that the safety is low; in addition, when the spraying cooling is performed, the heat exchanger of the outdoor unit is already in a high-temperature state, so that the safe and reliable operation of the system is influenced.

SUMMERY OF THE UTILITY MODEL

An embodiment of the utility model provides an air conditioning system has solved the heat exchanger of the off-premises station among the correlation technique and has produced the problem that high temperature high pressure was reported an emergency and asked for help or increased vigilance, and has avoided adopting water to lead to the perishable ageing problem of heat exchanger of off-premises station to the heat exchanger cooling of off-premises station.

In order to achieve the above object, an embodiment of the present invention provides an air conditioning system, which includes a compressor, an indoor heat exchanger, and an intermediate heat exchanger, wherein the compressor, the indoor heat exchanger, and the intermediate heat exchanger are sequentially communicated to form a compression refrigeration loop; the system also comprises a first circulating pump, a first pipeline shunt and a second pipeline shunt, wherein one end of two opposite ends of the first pipeline shunt is provided with a plurality of branch connecting ports, the other end of the first pipeline shunt is provided with a main connecting port, and the structure of the second pipeline shunt is the same as that of the first pipeline shunt; two ends of the intermediate heat exchanger are respectively connected with a main connecting port of the first pipeline shunt and a main connecting port of the second pipeline shunt through main connecting pipes, and branch connecting ports of the first pipeline shunt and branch connecting ports of the second pipeline shunt are correspondingly connected through a plurality of branch connecting pipes one by one so as to form an auxiliary refrigeration loop; the first circulating pump is arranged on the main connecting pipe, and the branch connecting pipes are buried underground and used for exchanging heat with rock and soil bodies and/or underground water; the refrigerant in the auxiliary refrigeration loop and the refrigerant in the compression refrigeration loop can exchange heat in the intermediate heat exchanger.

The embodiment of the utility model provides an air conditioning system, when high temperature in summer, the refrigerant in the compression refrigeration loop exchanges heat with the indoor air at the indoor heat exchanger, turns into the high temperature refrigerant and flows to the intermediate heat exchanger; the high-temperature refrigerant exchanges heat with the low-temperature refrigerant in the auxiliary refrigeration loop at the intermediate heat exchanger, so that the low-temperature refrigerant in the auxiliary refrigeration loop is converted into the high-temperature refrigerant; the refrigerant in the auxiliary refrigeration loop exchanges heat with the rock-soil body and/or the underground water at the plurality of branch connecting pipes, so that the high-temperature refrigerant in the auxiliary refrigeration loop is converted into the low-temperature refrigerant again. Compared with the prior art, the air conditioning system provided by the embodiment of the utility model can effectively release the heat of the intermediate heat exchanger to the rock and soil mass and/or underground water around the plurality of branch connecting pipes through the auxiliary refrigeration loop, does not need to arrange a heat exhausting fan to exhaust the heat to the outside air in an air cooling mode, and avoids the noise generated by the rotation of the heat exhausting fan; meanwhile, the temperature of underground rock and soil mass and underground water changes insignificantly along with the seasonal change and is not influenced by the outdoor temperature, the heat dissipation effect of the intermediate heat exchanger is still good at high temperature in summer, the problem that the heat exchanger of the outdoor unit generates high-temperature alarm in the related art is solved, and the problem that the heat exchanger of the outdoor unit is easy to corrode and age due to the fact that water is adopted to cool the heat exchanger of the outdoor unit is avoided.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an air conditioning system according to an embodiment of the present invention.

Reference numerals:

1-a compressor; 2-indoor heat exchanger; 3-an intermediate heat exchanger; 41-a first line splitter; 42-a second line splitter; 5-main connecting pipe; 51-a first circulation pump; 52-second circulation pump; 53-a first valve; 54-a second valve; 55-a first check valve; 56-a second check valve; 6-branch connecting pipe; 7-electronic expansion valve.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; the specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

The embodiment of the utility model provides an air conditioning system. As shown in fig. 1, the air conditioning system includes a compressor 1, an indoor heat exchanger 2, and an intermediate heat exchanger 3, wherein the compressor 1, the indoor heat exchanger 2, and the intermediate heat exchanger 3 are sequentially communicated to form a compression refrigeration loop; the system also comprises a first circulating pump 51, a first pipeline splitter 41 and a second pipeline splitter 42, wherein one end of two opposite ends of the first pipeline splitter 41 is provided with a plurality of branch connecting ports, the other end of the first pipeline splitter 41 is provided with a main connecting port, and the structure of the second pipeline splitter 42 is the same as that of the first pipeline splitter 41; two ends of the intermediate heat exchanger 3 are respectively connected with a main connecting port of the first pipeline shunt 41 and a main connecting port of the second pipeline shunt 42 through main connecting pipes 5, and branch connecting ports of the first pipeline shunt 41 and branch connecting ports of the second pipeline shunt 42 are correspondingly connected one by one through a plurality of branch connecting pipes 6 to form an auxiliary refrigeration loop; the first circulating pump 51 is arranged on the main connecting pipe 5, and the plurality of branch connecting pipes 6 are buried underground and used for exchanging heat with rock-soil bodies and/or underground water; the refrigerant in the auxiliary refrigeration circuit and the refrigerant in the compression refrigeration circuit can exchange heat in the intermediate heat exchanger 3.

In the cooling tower provided by the embodiment of the utility model, as shown in fig. 1, when the temperature is high in summer, the refrigerant in the compression refrigeration loop exchanges heat with the indoor air at the indoor heat exchanger 2, and is converted into the high-temperature refrigerant which flows to the intermediate heat exchanger 3; the high-temperature refrigerant exchanges heat with the low-temperature refrigerant in the auxiliary refrigeration loop in the intermediate heat exchanger 3, so that the low-temperature refrigerant in the auxiliary refrigeration loop is converted into the high-temperature refrigerant; the refrigerant in the auxiliary refrigeration loop exchanges heat with the rock-soil body and/or the underground water at the plurality of branch connecting pipes 6, so that the high-temperature refrigerant in the auxiliary refrigeration loop is converted into the low-temperature refrigerant again. Compared with the prior art, the air conditioning system provided by the embodiment of the utility model can effectively release the heat of the intermediate heat exchanger 3 to the rock and soil mass and/or the underground water around the plurality of branch connecting pipes 6 through the auxiliary refrigeration loop, and does not need to arrange the heat exhausting fan to exhaust the heat to the outside air in an air cooling mode, thereby avoiding the noise generated by the rotation of the heat exhausting fan; meanwhile, the temperature of underground rock and soil mass and underground water changes insignificantly along with the seasonal change and is not influenced by the outdoor temperature, and the heat dissipation effect of the intermediate heat exchanger 3 is still good at high temperature in summer, so that the problem of high temperature alarm generated by the heat exchanger of the outdoor unit in the related technology is solved, and the problem that the heat exchanger of the outdoor unit is easy to corrode and age due to the fact that water is adopted to cool the heat exchanger of the outdoor unit is avoided.

It should be noted that the first circulation pump 51 is usually disposed in the main connection pipe 5 connected to the inlet of the intermediate heat exchanger 3, and it is not necessary to dispose a circulation pump in each branch connection pipe 6, which saves costs. An electronic expansion valve 7 is further arranged on the compression refrigeration loop, and the opening degree of the electronic expansion valve 7 can be adjusted according to the outdoor temperature. In addition, in order to increase the heat exchange efficiency, each branch connection pipe 6 may be correspondingly provided with a coil heat exchanger, and of course, only a few branch connection pipes 6 may be provided with coil heat exchangers according to the requirement.

The refrigerant in the auxiliary refrigeration circuit is usually water. And water is used as a refrigerant in the auxiliary refrigeration loop, so that the cost is low. In addition, in order to improve the service life of the components in the auxiliary refrigeration circuit, the water quality of the circulating water in the auxiliary refrigeration circuit can be controlled. For example, the pH of the shower water is greater than 6.5 and less than 8.0, and the main connection pipe 5 and the branch connection pipe 6 are not easily corroded. Preferably, the refrigerant in the auxiliary refrigeration loop is purified water, the circulating water of the auxiliary refrigeration loop is closed, the water quality is stable, the service life of parts in the auxiliary refrigeration loop is long, and the system runs more stably and reliably for a long time. For convenience of explanation, the refrigerant in the auxiliary refrigeration circuit is explained in detail below with water as an example, and the scope of protection of the present invention is not limited.

Referring to fig. 1, a heat conductive partition is disposed in the intermediate heat exchanger 3, so that the intermediate heat exchanger 3 is divided into a first fluid channel and a second fluid channel; the first fluid channel is communicated with the indoor heat exchanger 2; both ends of the second fluid passage are connected to the main connection port of the first line splitter 41 and the main connection port of the second line splitter 42, respectively, via the main connection pipe 5. At this time, the refrigerant in the first fluid passage exchanges heat with the water in the second fluid passage, and the heat energy is transferred to the water. In order to improve the heat dissipation efficiency of the refrigerant in the first fluid channel, the first fluid channel is generally arranged around the second fluid channel, the heat exchange area is large, and the heat exchange between the low-temperature water in the second fluid channel and the outdoor air is avoided. For example, the intermediate heat exchanger 3 may be a double pipe heat exchanger, an outer pipe of the double pipe heat exchanger is communicated with the indoor heat exchanger 2, and both ends of an inner pipe of the double pipe heat exchanger are connected with the main connection pipe 5.

The flow directions of the refrigerant in the first fluid channel and the water in the second fluid channel of the intermediate heat exchanger 3 are opposite, that is, the refrigerant in the first fluid channel and the water in the second fluid channel flow in the reverse direction, which is beneficial to the heat exchange between the refrigerant in the first fluid channel and the water in the second fluid channel.

It can be understood that after the first circulation pump 51 stops working, the water in the auxiliary refrigeration loop may flow back, the water flowing back to the first circulation pump 51 may damage the first circulation pump 51, and in order to avoid the first circulation pump 51 from malfunctioning due to the water flowing back, as shown in fig. 1, the main connection pipe 5 is provided with a first check valve 55, and the first check valve 55 is disposed at the water outlet of the first circulation pump 51. In this case, when the first circulation pump 51 stops working due to an unexpected power failure, the first check valve 55 can prevent the first circulation pump 51 from being damaged by the backflow of water in the auxiliary refrigeration circuit, and the system operates more stably and reliably for a long time.

It should be understood that, in order to meet the heat exchange requirement between the plurality of branch connecting pipes 6 and the surrounding rock and soil mass and/or underground water, the buried depth of the plurality of branch connecting pipes 6 is 60m to 150m, that is, the closest distance between the branch connecting pipes 6 and the ground is greater than or equal to 60m, and the farthest distance between the branch connecting pipes 6 and the ground is less than or equal to 150m, so that the heat dissipation requirement can be met, the drilling depth required by pre-burying the connecting pipes cannot be too deep, the total required material saving of the main connecting pipe 5 and the branch connecting pipes 6 is achieved, and the drilling cost and the pipeline setting cost are low. Therefore, when the temperature is high in summer, the temperature of rock and soil bodies and/or underground water around the branch connecting pipes 6 is lower than that of outdoor air by about 15 ℃, and the heat exchange requirements of the branch connecting pipes 6 can be effectively met. In addition, the branch connecting pipes 6 are directly buried in the preset area through the main connecting pipe 5, and compared with the branch connecting pipes 6 which extend from the ground to the preset area, the used pipes are fewer, and the cost is lower.

Furthermore, the branch connecting pipe 6 can be made of various materials, preferably, the branch connecting pipe 6 is a cross-linked polyethylene pipe which has good comprehensive mechanical and physical properties, good thermal deformation, good wear resistance, good chemical corrosion resistance and good stress cracking resistance, and the service life of the branch connecting pipe can reach 50 years.

For further improvement of the reliability of the air conditioning system, the air conditioning system of the embodiment of the present invention further includes a redundant component system, as shown in fig. 1, the redundant component system includes a second circulation pump 52 forming a backup with the first circulation pump 51, and the second circulation pump 52 is connected in parallel with the first circulation pump 51. In this case, when the first circulation pump 51 is damaged or needs to be repaired, the second circulation pump 52 can be started, and the air conditioning system can be maintained under the condition of continuous operation, so that the system is safer and more reliable. Of course, the redundant component system may also include a redundant intermediate heat exchanger that forms a backup with the intermediate heat exchanger 3 and a redundant line splitter that forms a backup with the line splitter, which is not illustrated here.

It should be noted that, in order to realize the switching between the first circulation pump 51 and the second circulation pump 52, referring to fig. 1, a first valve 53 is disposed at a water inlet and a water outlet of the first circulation pump 51, a second valve 54 is disposed at a water inlet and a water outlet of the second circulation pump 52, the first circulation pump 51 and the second circulation pump 52 are disposed in parallel, the first valve 53 individually controls the on-off of the branch where the first circulation pump 51 is located, and the second valve 54 individually controls the on-off of the branch where the second circulation pump 52 is located. Similarly, a second check valve 56 is provided at the outlet of the second circulation pump 52.

It should be understood that the operation mode of the backup component included in the redundant component system is completely consistent with the operation mode of the original component, the connection relationship between the backup component included in the redundant component system and other components in the system is completely consistent with the connection relationship between the original component and other components in the system, the following description of the original component is also applicable to the backup component included in the redundant component system, and only the connection relationship and operation process of the original component are specifically described below.

In order to reduce the running cost, the utility model discloses air conditioning system still includes outdoor temperature sensor and controller, and outdoor temperature sensor is used for detecting outdoor temperature, and the controller is connected with outdoor temperature sensor and first circulating pump 51 electricity, and the controller can rise or reduce first circulating pump 51's power according to the outdoor temperature that outdoor temperature sensor detected. For example, when the outdoor temperature is lower than the first temperature, the controller reduces the power of the first circulation pump 51, reduces the energy consumption, and has low operation cost. For another example, when the outdoor temperature is higher than the first temperature, the controller increases the power of the first circulation pump 51 to ensure the heat exchange efficiency between the refrigerant in the compression refrigeration circuit and the water in the refrigeration circuit. The first temperature and the second temperature may be set according to actual conditions, and are not limited herein.

It should be noted that, the redundant component systems are all electrically connected to the controller, and whether the redundant component systems are started or not can be manually operated or automatically controlled. For example, whether the redundant component system is started or not is automatically controlled by the controller. Specifically, the air conditioning system further comprises an alarm, the alarm is electrically connected with the controller and used for detecting whether an original component in the air conditioning system fails or not, if the original component in the air conditioning system fails, an alarm is sent out, and the controller controls the starting of the standby component. Illustratively, when the first circulating pump 51 breaks down, the alarm gives an audible and visual alarm and gives a failure alarm message to the controller, and the controller controls the second circulating pump 52 to be turned on according to the failure alarm message of the first circulating pump 51.

Therefore, the utility model discloses air conditioning system can realize the operation of automatic control process and multiplex condition, reduces the human cost, reduces the running cost.

When the air conditioning system has a plurality of indoor heat exchangers 2, the plurality of indoor heat exchangers 2 may share one auxiliary refrigeration circuit, that is, the one auxiliary refrigeration circuit may correspond to a plurality of compression refrigeration circuits. Wherein a plurality of compression refrigeration circuits may share one intermediate heat exchanger 3. Therefore, the heat can be discharged in a centralized manner, and each compression refrigeration loop does not need to be configured independently, so that the space is saved, and the drilling cost and the related equipment cost required by the pre-embedded main connecting pipe and the branch connecting pipe 6 are saved.

In order to reduce the loss of cooling capacity, in the air conditioning system of the embodiment of the utility model, its main connecting pipe 5 that is used for the backward flow is the thermal-insulated pipe, the main connecting pipe 5 that is connected with the water inlet of middle heat exchanger 3 promptly. Taking the flow direction in fig. 1 as an example, the main connection pipe 5 between the second pipeline diverter 42 and the intermediate heat exchanger 3 is an insulated pipe, so that the loss of cooling capacity caused by indirect heat exchange with the rock-soil layer and the outdoor air when water flows in the main connection pipe 5 between the second pipeline diverter 42 and the intermediate heat exchanger 3 can be reduced.

In the description herein, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The above embodiments are only specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention, and all should be covered within the scope of protection of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. An air conditioning system comprises a compressor, an indoor heat exchanger and an intermediate heat exchanger, wherein the compressor, the indoor heat exchanger and the intermediate heat exchanger are communicated in sequence to form a compression refrigeration loop; the device is characterized by further comprising a first circulating pump, a first pipeline shunt and a second pipeline shunt, wherein one end of two opposite ends of the first pipeline shunt is provided with a plurality of branch connecting ports, the other end of the first pipeline shunt is provided with a main connecting port, and the structure of the second pipeline shunt is the same as that of the first pipeline shunt;

two ends of the intermediate heat exchanger are respectively connected with a main connecting port of the first pipeline shunt and a main connecting port of the second pipeline shunt through main connecting pipes, and branch connecting ports of the first pipeline shunt and branch connecting ports of the second pipeline shunt are correspondingly connected through a plurality of branch connecting pipes one by one so as to form an auxiliary refrigeration loop;

the first circulating pump is arranged on the main connecting pipe, and the branch connecting pipes are buried underground and used for exchanging heat with rock and soil bodies and/or underground water;

the refrigerant in the auxiliary refrigeration loop and the refrigerant in the compression refrigeration loop can exchange heat in the intermediate heat exchanger.

2. The air conditioning system as claimed in claim 1, wherein a first check valve is provided on the main connection pipe, and the first check valve is provided at a water outlet of the first circulation pump.

3. The air conditioning system of claim 1, wherein the branch connection pipe is located closest to the ground by a distance of 60m or more, and the branch connection pipe is located farthest from the ground by a distance of 150m or less.

4. The air conditioning system as claimed in claim 1, wherein the branch connection pipe is a cross-linked polyethylene pipe.

5. The air conditioning system of claim 1, further comprising a second circulation pump that forms a backup with the first circulation pump, the second circulation pump being disposed in parallel with the first circulation pump.

6. The air conditioning system of claim 1, further comprising a controller, an outdoor temperature sensor for detecting an outdoor temperature;

the controller is electrically connected with the outdoor temperature sensor and the first circulating pump, and the controller can increase or decrease the power of the first circulating pump according to the outdoor temperature detected by the outdoor temperature sensor.

7. The air conditioning system as claimed in claim 1, wherein one auxiliary refrigeration circuit corresponds to a plurality of compression refrigeration circuits.

8. The air conditioning system of claim 1, wherein a thermally conductive partition is disposed within the intermediate heat exchanger to divide the intermediate heat exchanger into a first fluid passage and a second fluid passage; the first fluid passage is in communication with the indoor heat exchanger; and two ends of the second fluid channel are respectively connected with the main connecting port of the first pipeline flow divider and the main connecting port of the second pipeline flow divider through the main connecting pipe.

9. The air conditioning system as claimed in claim 8, wherein the refrigerant flows in the first fluid passage and the refrigerant flows in the second fluid passage in opposite directions.

10. The air conditioning system as claimed in claim 1, wherein the refrigerant in the auxiliary refrigeration circuit is purified water.