A central air conditioning system with condensing heat recovery

Abstract

The utility model relates to central air conditioning technical field, and disclose a kind of condensing heat recovery's central air conditioning system, including refrigeration host computer, condensing heat recovery mechanism is connected with the pipeline in refrigeration host computer side, and condensing heat recovery mechanism includes heat exchanger and heat storage water tank, heat storage water tank pipeline is connected in heat exchanger side, cooling tower is connected with the pipeline in refrigeration host computer other side, and switching mechanism is provided on the pipeline between refrigeration host computer and cooling tower.The condensing heat recovery's central air conditioning system, through the condensing heat recovery mechanism set, with the effect of efficient recovery condensing heat, solved the problem that traditional central air conditioning system refrigeration condensing heat is directly discharged and causes energy waste, and the heat recovered can be used to heat domestic hot water, improve energy utilization.

Description

Technical Field

[0001] This utility model relates to the field of central air conditioning technology, specifically to a central air conditioning system with condensation heat recovery. Background Technology

[0002] Central air conditioning systems are indispensable environmental control devices in modern buildings, widely used in large venues such as office buildings, shopping malls, and hotels. They provide a comfortable indoor temperature environment through cooling or heating circulation.

[0003] Currently, in traditional central air conditioning systems, the high-temperature condensation heat emitted by the compressor during cooling operation is usually directly discharged into the environment through cooling towers or air-cooled condensers, resulting in a significant waste of energy. In addition, some existing central air conditioning systems with condensation heat recovery functions have low heat recovery efficiency, making it difficult to stably apply the recovered heat to scenarios such as domestic hot water heating. Furthermore, the overall coordination of the system is poor, which can easily affect the cooling effect of the central air conditioning during the heat recovery process, thus limiting its use. Utility Model Content

[0004] The purpose of this invention is to provide a central air conditioning system with condensation heat recovery to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a central air conditioning system for condensation heat recovery, comprising a refrigeration unit, a condensation heat recovery mechanism connected to one side of the refrigeration unit via a pipe, the condensation heat recovery mechanism comprising a heat exchanger and a hot water storage tank, the hot water storage tank being connected to one side of the heat exchanger via a pipe, a cooling tower being connected to the other side of the refrigeration unit via a pipe, and a switching mechanism being provided on the pipe between the refrigeration unit and the cooling tower.

[0006] Furthermore, the refrigeration unit includes a compressor, an evaporator, and a condenser. The compressor output pipe is connected to the condenser input pipe, the condenser output pipe is connected to the evaporator input pipe through a throttling device, the evaporator output pipe is connected to the compressor input pipe, and the condenser has a first outlet and a second outlet on one side.

[0007] The compressor is used to compress the refrigerant, the evaporator realizes the heat exchange between the refrigerant and the indoor air, and the condenser is the place where the refrigerant releases heat. The first outlet and the second outlet facilitate the diversion of condensation heat.

[0008] Furthermore, the input end of the heat exchanger is connected to the first outlet of the condenser through a first pipe, the output end of the heat exchanger is connected to the input end of the compressor through a second pipe, and a third pipe and a fourth pipe are provided on one side of the heat exchanger, which are respectively connected to the inlet and outlet of the hot water storage tank.

[0009] The heat exchanger can transfer the heat from the high-temperature refrigerant discharged from the condenser to the water in the hot water storage tank, realizing the recovery and utilization of condensation heat. The first pipe and the second pipe constitute the refrigerant circulation branch.

[0010] Furthermore, a temperature sensor is installed inside the hot water storage tank, a hot water output pipe is installed on one side of the hot water storage tank, and a valve is installed on the hot water output pipe. A cold water supply pipe is installed at the top of the hot water storage tank.

[0011] The temperature sensor can monitor the temperature of the water in the hot water storage tank, which facilitates the control of the heat recovery process. The hot water output pipe is used to output hot water, and the cold water supply pipe is used to supply cold water.

[0012] Furthermore, the switching mechanism includes a first valve and a second valve. The first valve is installed on a first pipe between the condenser and the heat exchanger, and the second valve is installed on a pipe between the condenser and the cooling tower. Both the first valve and the second valve are solenoid valves.

[0013] By controlling the on / off states of the first and second valves, the switching between condensation heat recovery mode and conventional heat dissipation mode can be achieved to meet the needs of different scenarios.

[0014] Furthermore, the cooling tower input end is connected to the second outlet of the condenser via a fifth pipe, the cooling tower output end is connected to the compressor input end via a sixth pipe, and a cooling fan is installed inside the cooling tower.

[0015] In normal operation, the cooling tower is responsible for dissipating the heat released by the condenser into the environment, while the cooling fan can improve the heat dissipation efficiency.

[0016] Furthermore, the system also includes a controller, which is electrically connected to the temperature sensor, the first valve, the second valve, the compressor, and the cooling fan, respectively.

[0017] The controller can automatically control the operation of each component based on the water temperature in the hot water storage tank and the system operating status, thereby improving the system's automation level and operating efficiency.

[0018] Compared with the prior art, this utility model provides a central air conditioning system with condensation heat recovery, which has the following beneficial effects:

[0019] 1. This central air conditioning system with condensation heat recovery has a high efficiency in recovering condensation heat through the set condensation heat recovery mechanism, which solves the problem of energy waste caused by the direct discharge of condensation heat during the cooling process of traditional central air conditioning systems. The recovered heat can be used to heat domestic hot water, thus improving energy utilization.

[0020] 2. This central air conditioning system with condensation heat recovery has the effect of flexibly switching operating modes through the set switching mechanism and controller. It can switch between condensation heat recovery mode and conventional heat dissipation mode according to actual needs, avoiding adverse effects of heat recovery process on the cooling effect of central air conditioning, and improving the stability and applicability of the system. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the refrigeration unit structure of this utility model;

[0024] Figure 3 This is a schematic diagram of the condensation heat recovery mechanism of this utility model;

[0025] Figure 4 This is a schematic diagram of the cooling tower structure of this utility model.

[0026] In the diagram: 1. Refrigeration unit; 11. Compressor; 12. Evaporator; 13. Condenser; 131. First outlet; 132. Second outlet; 14. Throttling device; 2. Condensation heat recovery mechanism; 21. Heat exchanger; 211. First pipe; 212. Second pipe; 213. Third pipe; 214. Fourth pipe; 22. Hot water storage tank; 221. Temperature sensor; 222. Hot water output pipe; 223. Valve; 224. Cold water supply pipe; 3. Cooling tower; 31. Fifth pipe; 32. Sixth pipe; 33. Cooling fan; 4. Switching mechanism; 41. First valve; 42. Second valve; 5. Controller. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] Example:

[0030] Please see Figure 1-4 This utility model provides a technical solution: a central air conditioning system with condensation heat recovery, including a refrigeration unit 1, a condensation heat recovery mechanism 2 connected to one side of the refrigeration unit 1 by a pipe, and the condensation heat recovery mechanism 2 includes a heat exchanger 21 and a hot water storage tank 22, the hot water storage tank 22 is connected to one side of the heat exchanger 21 by a pipe, the other side of the refrigeration unit 1 is connected to a cooling tower 3 by a pipe, and a switching mechanism 4 is provided on the pipe between the refrigeration unit 1 and the cooling tower 3.

[0031] The refrigeration unit 1 includes a compressor 11, an evaporator 12, and a condenser 13. The output end of the compressor 11 is connected to the input end of the condenser 13. The output end of the condenser 13 is connected to the input end of the evaporator 12 through a throttling device 14. The output end of the evaporator 12 is connected to the input end of the compressor 11. A first outlet 131 and a second outlet 132 are provided on one side of the condenser 13. Specifically, when the refrigeration unit 1 is running, the compressor 11 compresses the refrigerant into a high-temperature and high-pressure gas, which is sent into the condenser 13 to release heat. The refrigerant becomes a high-pressure liquid, which is throttled by the throttling device 14 and then enters the evaporator 12 to absorb heat and evaporate. It then returns to the compressor 11 to complete the cycle.

[0032] The input end of the heat exchanger 21 is connected to the first outlet 131 of the condenser 13 via the first pipe 211, and the output end of the heat exchanger 21 is connected to the input end of the compressor 11 via the second pipe 212. A third pipe 213 and a fourth pipe 214 are provided on one side of the heat exchanger 21, which are respectively connected to the inlet and outlet of the hot water storage tank 22. A temperature sensor 221 is provided inside the hot water storage tank 22, and a hot water output pipe 222 is provided on one side of the hot water storage tank 22, with a valve 223 on the hot water output pipe 222. A cold water replenishment pipe 224 is provided at the upper end of the hot water storage tank 22. Specifically, in the condensing heat recovery mode, the high-temperature refrigerant enters the heat exchanger 21 from the first outlet 131 of the condenser 13 via the first pipe 211 and exchanges heat with the cold water sent into the hot water storage tank 22 via the third pipe 213. The heated water returns to the hot water storage tank 22 via the fourth pipe 214, while the refrigerant returns to the compressor 11 via the second pipe 212.

[0033] The switching mechanism 4 includes a first valve 41 and a second valve 42. The first valve 41 is installed on the first pipe 211 between the condenser 13 and the heat exchanger 21, and the second valve 42 is installed on the pipe between the condenser 13 and the cooling tower 3. Both the first valve 41 and the second valve 42 are solenoid valves. The input end of the cooling tower 3 is connected to the second outlet 132 of the condenser 13 through the fifth pipe 31, and the output end of the cooling tower 3 is connected to the input end of the compressor 11 through the sixth pipe 32. A cooling fan 33 is installed inside the cooling tower 3. The system also includes a controller 5, which is electrically connected to the temperature sensor 221, the first valve 41, the second valve 42, the compressor 11, and the cooling fan 33. Specifically, when the water temperature in the hot water storage tank 22 reaches the set value, the temperature sensor 221 transmits a signal to the controller 5. The controller 5 controls the first valve 41 to close and the second valve 42 to open. The refrigerant enters the cooling tower 3 from the second outlet 132 of the condenser 13 through the fifth pipe 31, and after being cooled by the cooling fan 33, it returns to the compressor 11 through the sixth pipe 32.

[0034] Working principle: When the central air conditioning system with condensation heat recovery is running, the controller 5 controls the system to enter the corresponding mode according to actual needs. When condensation heat recovery is required, the controller 5 controls the first valve 41 to open and the second valve 42 to close. The high-temperature refrigerant generated by the operation of the refrigeration unit 1 enters the condenser 13 and flows from the first outlet 131 through the first pipe 211 into the heat exchanger 21.

[0035] Cold water in the hot water storage tank 22 enters the heat exchanger 21 through the third pipe 213, where it exchanges heat with the high-temperature refrigerant. After absorbing heat, it returns to the hot water storage tank 22 through the fourth pipe 214, thus heating the hot water. The refrigerant after heat exchange returns to the compressor 11 through the second pipe 212 to continue participating in the refrigeration cycle. The temperature sensor 221 inside the hot water storage tank 22 monitors the water temperature in real time. When the water temperature reaches the set value, the temperature sensor 221 sends a signal to the controller 5. The controller 5 controls the first valve 41 to close and the second valve 42 to open, while simultaneously starting the cooling tower 3's cooling fan 33.

[0036] At this time, the refrigerant in the condenser 13 enters the cooling tower 3 from the second outlet 132 through the fifth pipe 31. Under the action of the cooling fan 33, it exchanges heat with the air, releases heat, and returns to the compressor 11 through the sixth pipe 32, and the system enters the normal heat dissipation mode. When the water temperature in the hot water storage tank 22 is lower than the set value, the controller 5 switches back to the condensing heat recovery mode. Users can obtain hot water by opening the valve 223 on the hot water output pipe 222, while the hot water storage tank 22 is replenished with cold water through the cold water replenishment pipe 224.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A central air conditioning system with condensation heat recovery, characterized in that, The system includes a refrigeration unit (1), a condensing heat recovery mechanism (2) connected to one side of the refrigeration unit (1), and the condensing heat recovery mechanism (2) includes a heat exchanger (21) and a hot water storage tank (22). The hot water storage tank (22) is connected to one side of the heat exchanger (21), and a cooling tower (3) is connected to the other side of the refrigeration unit (1). A switching mechanism (4) is provided on the pipe between the refrigeration unit (1) and the cooling tower (3).

2. The central air conditioning system with condensation heat recovery according to claim 1, characterized in that, The refrigeration unit (1) includes a compressor (11), an evaporator (12) and a condenser (13). The output end of the compressor (11) is connected to the input end of the condenser (13) via a pipe. The output end of the condenser (13) is connected to the input end of the evaporator (12) via a pipe through a throttling device (14). The output end of the evaporator (12) is connected to the input end of the compressor (11) via a pipe. The condenser (13) has a first outlet (131) and a second outlet (132) on one side.

3. The central air conditioning system with condensation heat recovery according to claim 1, characterized in that, The input end of the heat exchanger (21) is connected to the first outlet (131) of the condenser (13) through the first pipe (211), and the output end of the heat exchanger (21) is connected to the input end of the compressor (11) through the second pipe (212). A third pipe (213) and a fourth pipe (214) are provided on one side of the heat exchanger (21), and the third pipe (213) and the fourth pipe (214) are respectively connected to the inlet and outlet of the hot water storage tank (22).

4. The central air conditioning system with condensation heat recovery according to claim 1, characterized in that, The hot water storage tank (22) is equipped with a temperature sensor (221), a hot water output pipe (222) is provided on one side of the hot water storage tank (222), and a valve (223) is provided on the hot water output pipe (222). A cold water supply pipe (224) is provided at the upper end of the hot water storage tank (22).

5. The central air conditioning system with condensation heat recovery according to claim 1, characterized in that, The switching mechanism (4) includes a first valve (41) and a second valve (42). The first valve (41) is installed on the first pipe (211) between the condenser (13) and the heat exchanger (21), and the second valve (42) is installed on the pipe between the condenser (13) and the cooling tower (3). Both the first valve (41) and the second valve (42) are solenoid valves.

6. The central air conditioning system with condensation heat recovery according to claim 1, characterized in that, The input end of the cooling tower (3) is connected to the second outlet (132) of the condenser (13) through the fifth pipe (31), and the output end of the cooling tower (3) is connected to the input end of the compressor (11) through the sixth pipe (32). A cooling fan (33) is installed inside the cooling tower (3).

7. The central air conditioning system with condensation heat recovery according to claim 1, characterized in that, The system also includes a controller (5), which is electrically connected to a temperature sensor (221), a first valve (41), a second valve (42), a compressor (11), and a cooling fan (33).

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