A new air conditioning device

Abstract

The utility model provides a novel air conditioning device, including outer machine, inner machine and additional pipeline, and additional pipeline includes heat exchanger and flow switch of installation on outer machine, and solenoid valve, liquid storage tank, hydraulic pump, non -return valve, three -way pipe and pipeline pressure switch of installation on inner machine, heat exchanger has the first heat exchange passage and the second heat exchange passage of independence to each other, and the first heat exchange passage flows first refrigerant in, and the second heat exchange passage flows second refrigerant in, one end of first heat exchange passage communicates with compressor, and the other end is connected with condenser through throttling capillary, one end of second heat exchange passage is connected with one end of evaporator after flow switch by using aluminium plastic pipe, and the other end is connected with the other end of evaporator, and solenoid valve, liquid storage tank, hydraulic pump, non -return valve and three -way pipe are sequentially provided on the connecting line of both. The air conditioning device makes between inner and outer machine not need through copper pipe connection through the mode of additional pipeline addition, thereby facilitating the installation of inner and outer machine.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning refrigeration and heating technology, and in particular to a novel air conditioning device. Background Technology

[0002] An air conditioner consists of four main components: a throttle valve, an evaporator, a compressor, and a condenser. These four components are connected in series to form a closed loop, typically using copper pipes for refrigerant flow. Copper pipes offer good heat exchange, are pressure-resistant, and prevent refrigerant leakage. However, in household air conditioners, these four components are usually installed separately in the indoor and outdoor units. Specifically, the throttle valve and evaporator are installed in the indoor unit, while the compressor and condenser are installed in the outdoor unit. The indoor and outdoor units are connected by copper pipes. The indoor unit is installed indoors, and the outdoor unit is installed outdoors. Copper pipes are relatively rigid and difficult to bend or change direction. Therefore, current household air conditioners are inconvenient for maintenance and disassembly of the outdoor unit during installation, and the indoor unit is also difficult to move after installation, especially the indoor unit of a floor-standing air conditioner. In addition, the traditional "one-to-many" outdoor unit design is difficult to promote due to the welding of multiple pipes and the complicated wiring control issues. Summary of the Invention

[0003] In view of the above, it is necessary to provide a new type of air conditioning device that eliminates the need for copper pipes to connect the indoor and outdoor units by adding additional piping, and also enables "wireless" control without the need for control wires between the indoor and outdoor units, thus facilitating the installation of the indoor and outdoor units.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A novel air conditioning unit includes an outdoor unit and an indoor unit. The outdoor unit is equipped with a compressor and a condenser, and the indoor unit is equipped with an evaporator. It also includes an auxiliary piping system comprising a heat exchanger, a flow switch, a solenoid valve, a liquid receiver, a hydraulic pump, a one-way check valve, a tee pipe, and a pipe pressure switch. The heat exchanger and flow switch are mounted on the outdoor unit, while the other components of the auxiliary piping system are mounted on the indoor unit. The heat exchanger is a coaxial structure with two independent heat exchange channels: a first refrigerant flows in the first heat exchange channel, and a second refrigerant flows in the second heat exchange channel. One end of the first heat exchange channel is connected to… The compressor is connected at one end, and the other end is connected to the condenser through a throttling capillary tube. The second heat exchange channel is sleeved outside the first heat exchange channel. One end of the second heat exchange channel is connected to a flow switch. The flow switch is connected to one end of the evaporator through an aluminum-plastic pipe. The other end of the evaporator is connected to the other end of the second heat exchange channel. A solenoid valve, a liquid receiver, a hydraulic pump, a one-way check valve, and a three-way pipe are sequentially arranged on the connection line between the other end of the evaporator and the other end of the second heat exchange channel. The three-way pipe is connected to the other end of the second heat exchange channel through an aluminum-plastic pipe. The pipeline pressure switch is installed on one end of the three-way pipe. The liquid receiver stores a second refrigerant.

[0005] Preferably, both the first heat exchange channel and the second heat exchange channel are made of copper tubes, wherein the copper tubes of the second heat exchange channel are in the form of corrugated tubes.

[0006] Preferably, the heat exchanger is wrapped with insulating cotton.

[0007] Preferably, the storage tank is provided with a liquid filling port.

[0008] Preferably, both the indoor and outdoor units are equipped with quick-connect pipe fittings, and the aluminum-plastic pipe is detachably connected to the indoor and outdoor units through the quick-connect pipe fittings; the aluminum-plastic pipe is covered with insulation cotton.

[0009] Preferably, a low-pressure switch is provided on the connection line between the compressor and the heat exchanger, a high-pressure switch is provided on the connection line between the compressor and the condenser, and a temperature control switch is provided on the connection line between the second heat exchange channel and the three-way pipe. The temperature control switch is installed on the outdoor unit.

[0010] Preferably, the indoor unit is provided with an indoor unit main control board and an indoor unit power cord connector. The indoor unit main control board is connected to the indoor unit power cord connector and is also electrically connected to a solenoid valve, an indoor fan motor, and a pipeline pressure switch, and is electrically connected to a hydraulic pump through the pipeline pressure switch. The outdoor unit is equipped with an outdoor unit power cord connector and a circuit control board. The outdoor unit power cord connector is connected to the circuit control board to supply power to the circuit control board. The connection relationship between the circuit control board and the control circuits of each electrical module on the outdoor unit is as follows: the live wire L is connected to one end of the flow switch and one end of the compressor time delay relay switch. The other end of the flow switch is connected in sequence to the temperature control switch, the high pressure switch, the low pressure switch, and one end of the time delay relay coil. The other end of the compressor time delay relay coil is connected to the neutral wire N. The other end of the compressor time delay relay switch is connected to one end of the compressor and one end of the outdoor fan motor. The other end of the compressor and the other end of the outdoor fan motor are then connected to the neutral wire N.

[0011] Preferably, the second refrigerant is antifreeze.

[0012] Preferably, the second refrigerant is an ethylene glycol solution.

[0013] Preferably, multiple indoor units are provided, and one outdoor unit is provided. Both ends of the second heat exchange channel of the outdoor unit are connected to a main pipe composed of aluminum-plastic composite pipes. The evaporator of each indoor unit is connected to one end of the second heat exchange channel of the outdoor unit via an aluminum-plastic composite pipe connected to the main pipe. The tee pipe of each indoor unit is also connected to the other end of the second heat exchange channel of the outdoor unit via an aluminum-plastic composite pipe connected to the main pipe. Compared with the prior art, the present invention has the following beneficial effects: This utility model uses an additional pipeline to connect the indoor and outdoor units, replacing copper pipes with easily bendable, movable, and disassembled aluminum-plastic pipes. Furthermore, the indoor and outdoor units can be controlled wirelessly without the need for control wires, greatly facilitating the disassembly, assembly, and maintenance of the air conditioning unit.

[0014] Specifically, the additional piping of this utility model changes the installation method and refrigerant flow method of the traditional four major components of an air conditioner through the setting of a heat exchanger. The condenser and compressor in the outdoor unit are no longer directly connected to the evaporator in the indoor unit, but are connected through the heat exchanger of the additional piping. The first heat exchange channel of the heat exchanger of the additional piping is connected to the compressor and condenser in the outdoor unit. A throttling capillary tube is also installed between the first heat exchange channel and the condenser. In this way, the first heat exchange channel of the heat exchanger, the compressor, the condenser and the throttling capillary tube form a first closed loop for the flow of the first refrigerant. The piping of this first closed loop uses traditional copper pipes, which can ensure the stable flow of refrigerant in the loop. Since this first closed loop is centrally installed in the outdoor unit and is independent of the indoor unit, there is no copper pipe connection problem, so the outdoor unit is very convenient to install. In this first closed loop, the first refrigerant is compressed into a high-temperature, high-pressure gas by the compressor, then releases heat and condenses into a medium-temperature, high-pressure liquid in the condenser. This liquid then becomes a low-temperature, low-pressure liquid through a throttling capillary tube, and subsequently exchanges heat with the second refrigerant in the second heat exchange channel of the heat exchanger. The first refrigerant in the first heat exchange channel absorbs heat from the second refrigerant in the second heat exchange channel, becoming a low-temperature, low-pressure gas, which then returns to the compressor for further compression. Meanwhile, the second refrigerant in the second heat exchange channel, after absorbing heat from the first refrigerant, experiences a temperature reduction. This cooled refrigerant then cools the air through the evaporator in the indoor unit. The cooled air is then blown into the room, thus achieving cooling. In this invention, the second refrigerant circulates within the second closed loop, exchanging heat in the heat exchanger to achieve indoor cooling or heating. In the second closed loop, it is a closed loop consisting of the second heat exchange channel of the heat exchanger, the evaporator, the liquid receiver, the hydraulic pump, the one-way check valve, and the three-way pipe. The second heat exchange channel in this second closed loop is installed in the outdoor unit, while the others are installed in the indoor unit. Therefore, the connection problem between the indoor and outdoor units of this utility model is actually the connection problem between the second heat exchange channel and the evaporator and the three-way pipe in the second closed loop. Since the second refrigerant flowing in the second closed loop is actually antifreeze, which is a substance that exchanges heat with the first refrigerant, the second refrigerant is always in a liquid state in the entire second closed loop. There is no pressure change problem and no phase change. Therefore, this utility model uses aluminum-plastic pipe for the connection between the second heat exchange channel and the evaporator and the three-way pipe. Aluminum-plastic pipe has high strength, does not deform or corrode after being heated, and is resistant to high pressure. However, compared with copper pipe, it is easy to bend and easy to disassemble and assemble. Therefore, the connection method of aluminum-plastic pipe makes the indoor and outdoor units of this utility model easy to install, disassemble and assemble, and easy to maintain. Attached Figure Description

[0015] Figure 1 This is a diagram showing the connection of the indoor and outdoor piping of the air conditioning unit of this utility model.

[0016] Figure 2 This is a simplified structural diagram of the heat exchanger of this utility model.

[0017] Figure 3 This is a product drawing of the heat exchanger of this utility model.

[0018] Figure 4 This is a product image of the heat exchanger of this utility model after it has been wrapped with insulation cotton.

[0019] Figure 5 This is a schematic diagram of the heat exchanger of this utility model installed on the outdoor unit.

[0020] Figure 6 This is a product drawing of the liquid storage tank in the additional pipeline of this utility model.

[0021] Figure 7 This is a product diagram showing the connection and installation of the additional piping structure of this utility model, excluding the heat exchanger and flow switch.

[0022] Figure 8 This is a schematic diagram of the additional piping of this utility model installed in the indoor unit.

[0023] Figure 9 This is a utility model Figure 8 A partial schematic diagram of the location of the additional pipeline.

[0024] Figure 10 This is the power control circuit diagram for the indoor unit air conditioner of this utility model.

[0025] Figure 11 This is the power control circuit diagram for the outdoor unit of the air conditioner.

[0026] Figure 12 This is a structural schematic diagram of the aluminum-plastic pipe connector accessory for the outdoor unit of this utility model.

[0027] Figure 13 This is a connection diagram of one outdoor unit corresponding to one indoor unit of this utility model.

[0028] Figure 14 This is a schematic diagram of the "one-to-many" configuration of the present invention, in which one outdoor unit corresponds to multiple indoor units.

[0029] Explanation of main component symbols In the diagram: 1. Compressor; 2. Condenser; 3. Throttling capillary tube; 4. Heat exchanger; 4.1 First heat exchange channel; 4.2 Second heat exchange channel; 4.3 Insulation cotton; 5. Evaporator; 6. Flow switch; 7. Solenoid valve; 8. Liquid receiver; 9. Hydraulic pump; 10. One-way check valve; 11. T-connector; 12. Pipeline pressure switch; 13. Aluminum-plastic pipe; 14. Pipeline quick-connect fitting; 15. Temperature control switch; 16. High-pressure switch; 17. Low-pressure switch; 18. Time delay relay; 19. External fan motor; 20. Internal fan motor; 21. Main pipeline.

[0030] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this utility model. Detailed Implementation

[0031] Please see Figure 1-13 In a preferred embodiment of this utility model, a novel air conditioning device includes an outdoor unit, an indoor unit, and auxiliary piping. The outdoor unit is equipped with a compressor 1 and a condenser 2, and the indoor unit is equipped with an evaporator 5. The auxiliary piping includes a heat exchanger 4, a flow switch 6, a solenoid valve 7, a liquid receiver 8, a hydraulic pump 9, a one-way check valve 10, a three-way pipe 11, and a pipe pressure switch 12. The heat exchanger 4 and the flow switch 6 are both installed on the outdoor unit, while the other components of the auxiliary piping are installed on the indoor unit. The heat exchanger 4 is a sleeve-type structure, having independent first heat exchange channels 4.1 and second heat exchange channels 4.2. A first refrigerant flows in the first heat exchange channel 4.1, and a second refrigerant flows in the second heat exchange channel 4.2. One end of the first heat exchange channel 4.1 is connected to the compressor 1, and the other end is connected to the condenser 2 through a throttling capillary tube 3. The second heat exchange channel 4.2 is sleeved outside the first heat exchange channel 4.1, and one end of the second heat exchange channel 4.2 is connected to the flow switch 6. 6. One end of the evaporator 5 is connected to the aluminum-plastic pipe 13. The other end of the evaporator 5 is connected to the other end of the second heat exchange channel 4.2. A solenoid valve 7, a liquid storage tank 8, a hydraulic pump 9, a one-way check valve 10, and a three-way pipe 11 are sequentially arranged on the connection line between the other end of the evaporator 5 and the other end of the second heat exchange channel 4.2. The three-way pipe 11 is connected to the other end of the second heat exchange channel 4.2 through the aluminum-plastic pipe 13. The pipeline pressure switch 12 is installed on one end of the three-way pipe 11. The liquid storage tank 8 stores the second refrigerant.

[0032] This invention eliminates the need for copper pipe connections between the indoor and outdoor units by adding an auxiliary pipeline. Furthermore, it enables "wireless" control between the indoor and outdoor units without the need for control wires, thus resolving the installation inconvenience caused by copper pipe connections. Specifically, the auxiliary pipeline, through the addition of heat exchanger 4, alters the traditional connection method of the four main components of the refrigeration system. That is, due to the addition of heat exchanger 4, the pipeline connection of the four main components in the refrigeration system is no longer compressor 1-condenser 2-throttling device-evaporator 5-compressor 1, but rather becomes two independent closed loops for refrigerant flow. The first closed loop is formed by compressor 1, condenser 2, throttling capillary tube 3, heat exchanger 4 with auxiliary pipeline, and the first heat exchange channel 4.1 of compressor 1. The first refrigerant flows in this first closed loop. This first refrigerant is the same as the refrigerant used in conventional refrigeration systems, such as "R22". The flow process and changes of the first refrigerant in the first closed loop are also the same as the pipeline changes in conventional refrigeration systems. The only difference is that the first heat exchange channel 4.1 in the first closed loop acts as the evaporator 5 in conventional refrigeration systems. The heat absorbed by the first heat exchange channel 4.1 during heat exchange comes from the second refrigerant flowing in the second heat exchange channel 4.2, rather than air. The second closed loop of this invention is formed by the second heat exchange channel 4.2 of the heat exchanger 4 with auxiliary pipeline, the evaporator 5, the solenoid valve 7, the liquid storage tank 8, the hydraulic pump 9, the one-way check valve 10, the three-way pipe 11, and the second heat exchange channel 4.2 of the heat exchanger 4 with auxiliary pipeline. The second refrigerant flows in the second closed loop. The second refrigerant absorbs heat from the first refrigerant in the first heat exchange channel 4.1 in the second heat exchange channel 4.2 of the heat exchanger 4, and the temperature of the second refrigerant decreases. After flowing into the evaporator 5, it can absorb heat from the air passing through the evaporator 5, thereby lowering the temperature of the air. The lowered temperature air is then blown into the room, thus achieving cooling and temperature control. In this second closed loop, except for the second heat exchange channel 4.2 which is installed on the outdoor unit, all other structures are installed on the indoor unit. In contrast, all structures in the first closed loop are installed on the outdoor unit. Therefore, for the air conditioning device of this invention, the connection between the indoor and outdoor units is actually the connection between the second heat exchange channel 4.2 of the heat exchanger 4 in the second closed loop and the evaporator 5 and the three-way pipe 11. Since the second refrigerant in the second closed loop is liquid throughout the loop and does not involve a phase change, it is not necessary to use copper pipes for pipe connection to ensure the stable flow of the second refrigerant. For this purpose, this invention uses an easily bendable, stable, high-pressure resistant, and corrosion-resistant aluminum-plastic pipe 13 to connect the second heat exchange channel 4.2, the evaporator 5, and the three-way pipe 11. In this way, based on the easily bendable aluminum-plastic pipe 13, the connection and movement of the indoor and outdoor units become convenient, that is, easy to disassemble and assemble, and easy to operate, solving the defects of inconvenient installation and inconvenient movement after installation of existing air conditioners.

[0033] In this invention, the heat exchanger 4 with additional piping has a shell-and-tube structure, which can be considered as the "evaporator 5" in the first closed loop and the "condenser 2" in the second closed loop. The two closed loops form a heat exchange structure by utilizing the need for heat absorption and the need for heat release. In this embodiment, both the first heat exchange channel 4.1 and the second heat exchange channel 4.2 are made of copper tubes, wherein the copper tube of the second heat exchange channel 4.2 is in the form of a corrugated tube. To improve the heat exchange effect and reduce the exchange of heat with the outside, the heat exchanger 4 is wrapped with insulation cotton 4.3. Figure 4 As shown, the structure of the uninsulated part 4.3 is as follows. Figure 3 As shown in the figure, the corrugated pipe structure is the second heat exchange channel 4.2. The structure of the first heat exchange channel 4.1, located inside the second heat exchange pipe, is not shown. Both ends of the first heat exchange channel 4.1 are located outside the ends of the second heat exchange channel 4.2, with one end connected to a throttling capillary tube 3. Three-way copper pipe joints are welded to both ends of the second heat exchange channel 4.2, so that the first heat exchange channel 4.1 and the second heat exchange channel 4.2 constitute a "coupling-type heat exchanger 4". The heat exchanger 4 of this invention is installed on the casing of the outdoor unit, specifically at the air vent of the outdoor unit. Its specific structure is as follows... Figure 5 As shown, for the heat exchanger 4, in this embodiment, a copper tube with an outer diameter of 12mm is used as the first heat exchange channel 4.1, and a corrugated copper tube with an outer diameter of 22mm is used as the second heat exchange channel 4.2. The three-way copper tube joint is a three-way joint with an inner diameter of 22mm. After the joint is made, insulation cotton 4.3 is put on it and then the structure is connected by welding. The throttling capillary tube 3 is also connected to the first heat exchange channel 4.1 by welding.

[0034] As can be seen from the above, the connection between the indoor and outdoor units of this utility model is actually the pipeline connection relationship between the second heat exchange channel 4.2 and the evaporator 5 and the three-way pipe 11 in the second closed loop. In this utility model, the connection between the second heat exchange channel 4.2 and the evaporator 5, and the connection between the second heat exchange channel 4.2 and the three-way pipe 11 are both made using aluminum-plastic pipe 13. The aluminum-plastic pipe 13 can be bent and deformed, thus facilitating the disassembly and assembly of the indoor and outdoor units. In this embodiment, to facilitate the installation and removal of the aluminum-plastic pipe 13, quick-connect fittings 14 are preferably used for connection. That is, both the indoor and outdoor units are equipped with quick-connect fittings 14, and the aluminum-plastic pipe 13 can be detachably connected to the indoor and outdoor units via these quick-connect fittings 14. Specifically, both the indoor and outdoor units have two connection A ends of the quick-connect fittings 14, and both ends of the aluminum-plastic pipe 13 have connection B ends of the quick-connect fittings 14. Connection B ends and connection A ends constitute a complete quick-connect fitting 14. When connection B ends are connected to connection A ends, the aluminum-plastic pipe 13 can be quickly connected to either the indoor or outdoor unit, improving the convenience of installation and removal. This method also allows for adjustment of the length of the aluminum-plastic pipe 13 according to actual needs, making the installation position of the indoor and outdoor units adjustable and versatile, convenient to use, and highly practical. Furthermore, it facilitates the maintenance and replacement of the aluminum-plastic pipe 13, thereby preventing damage to the aluminum-plastic pipe 13 due to prolonged use and the resulting refrigerant leakage, improving the safety and lifespan of the air conditioning unit. In addition, in order to improve the heat exchange effect and reduce heat loss at the aluminum-plastic pipe, this embodiment is provided with insulation cotton wrapped around the outside of the aluminum-plastic pipe.

[0035] In this invention, the second refrigerant flowing in the second closed loop does not require compression by the compressor 1 to undergo a phase change, but achieves refrigeration through heat exchange. In this embodiment, the second refrigerant is an antifreeze, such as an ethylene glycol solution. Ethylene glycol solution is inexpensive, odorless, and will not have a pungent smell even if it leaks. It is also readily available and relatively environmentally friendly. In practice, "white rice wine" can be used as an antifreeze. This antifreeze is stored in a liquid storage tank 8, that is, the second refrigerant is stored in the liquid storage tank 8. To facilitate the addition of the second refrigerant, the liquid storage tank 8 is provided with a filling port.

[0036] It should be noted that the second closed loop of this invention is filled with a liquid refrigerant, which is stored in a liquid storage tank 8 and is drawn and driven by a hydraulic pump 9 to flow in the second closed loop. During the flow, the refrigerant will drive the air in the pipeline of the second closed loop into the liquid storage tank 8 and can be discharged from the liquid filling port in the liquid storage tank 8. In this way, after the air conditioning unit is installed, the air conditioning pipeline system does not need to be vacuumed.

[0037] This invention protects the machine by installing various switches and valves on the pipeline, such as a flow switch 6, a solenoid valve 7, and a pipeline pressure switch 12. Furthermore, this embodiment also includes other switches to further protect the pipeline system. Specifically, a low-pressure switch 17 is installed on the connection line between the compressor 1 and the heat exchanger 4; a high-pressure switch 16 is installed on the connection line between the compressor 1 and the condenser 2; and a temperature control switch 15 is installed on the connection line between the second heat exchange channel 4.2 and the tee pipe 11. The temperature control switch 15 is installed on the outdoor unit. Furthermore, the indoor unit is equipped with an indoor unit main control board and an indoor unit power cord connector. The indoor unit main control board is connected to the indoor unit power cord connector and is also electrically connected to the solenoid valve 7, the indoor fan motor 20, and the pipeline pressure switch 12, and is electrically connected to the hydraulic pump 9 through the pipeline pressure switch 12. The outdoor unit is equipped with an outdoor unit power cord connector and a circuit control board. The outdoor unit power cord connector is connected to the circuit control board to supply power to the circuit control board. The connection relationship between the circuit control board and the control circuits of each electrical module on the outdoor unit is as follows: the live wire L is connected to one end of the flow switch 6 and one end of the compressor 1 time delay relay 18 switch. The other end of the flow switch 6 is connected in sequence to the temperature control switch 15, the high pressure switch 16, the low pressure switch 17, and one end of the coil of the time delay relay 18. The other end of the coil of the compressor 1 time delay relay 18 is connected to the neutral wire N. The other end of the compressor 1 time delay relay 18 switch is connected to one end of the compressor 1 and one end of the outdoor fan motor 19. The other end of the compressor 1 and the other end of the outdoor fan motor 19 are then connected to the neutral wire N. The circuit connection described above is as follows Figure 10-11 As shown.

[0038] That is, the indoor and outdoor units of this utility model are connected to the power supply through their respective power cord connectors, and both are powered independently. Therefore, there is no need to connect control wires between the indoor and outdoor units, and the indoor unit can "wirelessly" control the operation of the outdoor unit. The specific control principle is as follows: (1) After the air conditioning piping is connected and installed, start the indoor unit, solenoid valve 7 opens, and hydraulic pump 9 starts. The second refrigerant flows from the liquid receiver 8 to the hydraulic pump 9, through the one-way check valve 10, the three-way pipe 11, and through the aluminum-plastic pipe 13 connected to the three-way pipe 11 to the second flow channel of the heat exchanger 4 in the outdoor unit. After the second refrigerant exchanges heat in the heat exchanger 4, it flows through the flow switch 6, then through the aluminum-plastic pipe 13 connected to the evaporator 5 to the evaporator 5, and finally flows through the solenoid valve 7 and back to the liquid receiver 8. At the same time, the air in the piping system is also automatically discharged from the liquid receiver 8 filling port, thus completing the circulation of the second refrigerant in the second closed loop.

[0039] During this circulation process, the second refrigerant flows through the pipeline pressure switch 12 in the three-way pipe 11. The pipeline pressure switch 12 can sense the pressure in the pipeline system. When an abnormality occurs in the pipeline flow, such as a damaged or disconnected solenoid valve 7, the second refrigerant cannot flow back to the liquid receiver 8, and thus internal circulation cannot occur. While the hydraulic pump 9 is still operating, due to the action of the one-way check valve 10, the second refrigerant cannot flow backward and will continue to flow through the three-way pipe 11. The second refrigerant will then pressurize the pipeline pressure switch 12, causing it to open under pressure. Once the pipeline pressure switch 12 opens, the hydraulic pump 9 loses power and stops operating. Therefore, the pipeline pressure switch 12 plays a protective role in the pressure of the second refrigerant pipeline system in the indoor unit.

[0040] During this circulation process, the second refrigerant also flows through the flow switch 6 and the temperature control switch 15. When the flow switch 6 detects the flow of the second refrigerant in the pipeline, the flow switch 6 closes and the current is turned on. When the flow switch 6 does not detect the flow of the second refrigerant (such as when the solenoid valve 7 and / or the hydraulic pump 9 stop working), the flow switch 6 opens and is in an open circuit state. The circuit of the outdoor unit is not turned on, and the compressor 1 and the outdoor unit fan motor stop working. The temperature control switch 15 can sense the temperature of the second refrigerant before it enters the heat exchanger 4 for heat exchange in real time. When the temperature of the second refrigerant does not reach the set temperature of the temperature control switch 15, the temperature control switch 15 is in the closed state. The high pressure switch 16 and the low pressure switch 17 are both normally closed switches. In addition, the flow switch 6 when the second refrigerant is flowing normally is also in the closed state. Therefore, the circuit of the outdoor unit is connected, the coil of the time delay relay 18 of the compressor 1 is energized, and the switch of the time delay relay 18 is closed under the action of the coil. The compressor 1 and the outdoor fan motor 19 are energized and run normally. The first refrigerant circulates in the first closed loop in the outdoor unit, realizing heat exchange with the second refrigerant in the heat exchanger 4. This allows the evaporator 5 in the indoor unit to exchange heat with the air, so as to blow cold or hot air into the room. When the temperature control switch 15 senses that the temperature of the second refrigerant is higher than its set maximum temperature or lower than its set minimum temperature, the temperature control switch 15 opens, the coil of the time delay relay 18 of the compressor 1 is de-energized, the switch of the time delay relay 18 opens, the compressor 1 and the outdoor fan motor 19 lose power and stop working, and the outdoor unit does not run. This situation is due to a malfunction in the indoor unit, such as damage to the indoor fan motor 20 or the solenoid valve 7, which causes the evaporator 5 of the indoor unit to be unable to exchange heat.

[0041] In the outdoor unit's control circuit, a high-pressure switch 16 and a low-pressure switch 17 are installed to monitor the status of the first refrigerant. When the first refrigerant leaks or decreases, the low-pressure switch 17 opens but cannot conduct, triggering the coil of the time-delay relay 18 of compressor 1. This causes the time-delay relay 18 to open, de-energizing compressor 1 and the outdoor fan motor 19, preventing them from operating. If the outdoor fan motor 19 is damaged or the machine is excessively dusty, resulting in poor heat dissipation from the condenser 2, the pressure of the first refrigerant in the condenser 2 will become too high. This causes the high-pressure switch 16 to open due to the high pressure. Once the high-pressure switch 16 opens, the outdoor unit's circuit loses power, preventing compressor 1 and the outdoor fan motor 19 from working, thus protecting compressor 1.

[0042] (2) When the indoor unit control board detects that the set temperature has been reached, the solenoid valve 7 and the hydraulic pump 9 stop working, and the second refrigerant also stops flowing. When the outdoor unit flow switch 6 does not detect the flow of the second refrigerant, the flow switch 6 is in the open circuit state, and the compressor 1 also stops working.

[0043] (3) When the indoor temperature rises, the indoor unit control board starts, the solenoid valve 7 opens, and the hydraulic pump 9 works again. When the outdoor unit flow switch 6 detects the flow of the second refrigerant, the flow switch 6 is in the conducting state again. Through the control board, the compressor 1 also starts and cools normally.

[0044] In summary, through the design of the control circuit, the indoor and outdoor units of this utility model can achieve "wireless" control. As can be seen from the above, the protection functions of this device are relatively complete. If any one of the indoor unit's solenoid valve 7, pipeline pressure switch 12, or hydraulic pump 9 is damaged, or if the second refrigerant is insufficient, the outdoor unit will not start. If the outdoor unit's first refrigerant is insufficient, the low-pressure protection will be activated. If the condenser 2 is not properly cooled or the cooling fan is damaged, the high-pressure switch 16 will be activated, and the compressor 1 will stop working, thus achieving a certain level of protection for the compressor 1.

[0045] Additionally, it should be noted that after the indoor unit starts venting, the liquid receiver 8 is filled with a sufficient amount of the second refrigerant to ensure the cooling effect of the indoor unit.

[0046] Furthermore, since the indoor and outdoor units of this utility model are connected by aluminum-plastic pipes 13, the installation positions of the indoor and outdoor units can be adjusted by lengthening the aluminum-plastic pipes 13. This makes the installation of the indoor and outdoor units not limited by the pipe connection, and the position of the units can be moved at any time. In addition, by adding aluminum-plastic pipes 13, one outdoor unit can drive multiple indoor units to exchange heat in different spatial environments, and the independence between multiple indoor units can be guaranteed. That is, multiple indoor units can be used simultaneously, or a single indoor unit can be controlled as needed. This "one-to-many" design can meet the needs of different places (such as bedrooms, dining rooms, living rooms, TV rooms, studies, etc.) and different usage times. Since there is no need to connect the indoor and outdoor units through control wires, installation costs can be saved to a certain extent. The specific structure of this "one-to-many" design is as follows: Multiple indoor units are installed, and one outdoor unit is installed. Both ends of the second heat exchange channel 4.2 of the outdoor unit are connected to a main pipe 21 composed of aluminum-plastic composite pipes. The evaporator 5 of each indoor unit is connected to one end of the second heat exchange channel 4.2 of the outdoor unit via an aluminum-plastic composite pipe 13 connected to the main pipe 21. The tee pipe 11 of each indoor unit is also connected to the other end of the second heat exchange channel 4.2 of the outdoor unit via an aluminum-plastic composite pipe 13 connected to the main pipe 21. The specific connection structure is as follows: Figure 14 As shown.

[0047] Finally, it should be noted that a drip tray is installed at the bottom of the indoor unit. This drip tray is located directly below the liquid storage tank 12 and the evaporator 5, and is used to collect the condensate from the evaporator 5 and the liquid storage tank 12 during cooling. The drip tray is connected to a drain pipe, and the water in the drip tray is discharged to the outside of the indoor unit through the drain pipe. In this application, the drip tray is located inside the indoor unit; therefore, it is not shown in detail in the accompanying drawings of this application, but only partially. Figure 7 It is shown in an illustrative manner.

[0048] The above description is a detailed description of the preferred embodiments of the present utility model. However, the embodiments are not intended to limit the scope of the patent application of the present utility model. All equivalent changes or modifications made under the technical spirit of the present utility model should fall within the patent scope covered by the present utility model.

Claims

1. A novel air conditioning unit, comprising an outdoor unit and an indoor unit, wherein the outdoor unit is equipped with a compressor and a condenser, and the indoor unit is equipped with an evaporator, characterized in that: It also includes auxiliary piping, which includes a heat exchanger, flow switch, solenoid valve, liquid receiver, hydraulic pump, one-way check valve, tee pipe, and pipeline pressure switch. The heat exchanger and flow switch are installed on the outdoor unit, while the other components of the auxiliary piping are installed on the indoor unit. The heat exchanger is a shell-and-tube structure with independent first and second heat exchange channels. A first refrigerant flows in the first heat exchange channel, and a second refrigerant flows in the second heat exchange channel. One end of the first heat exchange channel is connected to the compressor, and the other end is connected to the condenser through a throttling capillary tube. The second heat exchange channel is sleeved outside the first heat exchange channel. One end of the second heat exchange channel is connected to a flow switch. The flow switch is connected to one end of the evaporator through an aluminum-plastic pipe. The other end of the evaporator is connected to the other end of the second heat exchange channel. A solenoid valve, a liquid receiver, a hydraulic pump, a one-way check valve, and a three-way pipe are sequentially arranged on the connection line between the other end of the evaporator and the other end of the second heat exchange channel. The three-way pipe and the other end of the second heat exchange channel are connected through an aluminum-plastic pipe. The pipeline pressure switch is installed on one end of the three-way pipe. The liquid receiver stores a second refrigerant.

2. The novel air conditioning device as described in claim 1, characterized in that: Both the first heat exchange channel and the second heat exchange channel are made of copper tubes, wherein the copper tubes of the second heat exchange channel are in the form of corrugated tubes.

3. The novel air conditioning device as described in claim 1, characterized in that: The heat exchanger is wrapped with insulating cotton.

4. The novel air conditioning device as described in claim 1, characterized in that: The storage tank is equipped with a liquid filling port.

5. A novel air conditioning device as described in claim 1, characterized in that: Both the indoor and outdoor units are equipped with quick-connect pipe fittings, and the aluminum-plastic pipe can be detachably connected to the indoor and outdoor units through the quick-connect pipe fittings; the aluminum-plastic pipe is covered with insulation cotton.

6. A novel air conditioning device as described in claim 1, characterized in that: A low-pressure switch is installed on the connection line between the compressor and the heat exchanger, a high-pressure switch is installed on the connection line between the compressor and the condenser, and a temperature control switch is installed on the connection line between the second heat exchange channel and the three-way pipe. The temperature control switch is installed on the outdoor unit.

7. A novel air conditioning device as described in claim 6, characterized in that: The indoor unit is equipped with an indoor unit main control board and an indoor unit power cord connector. The indoor unit main control board is connected to the indoor unit power cord connector and is also electrically connected to a solenoid valve, an indoor fan motor, and a pipeline pressure switch. The hydraulic pump is also electrically connected through the pipeline pressure switch. The outdoor unit is equipped with an outdoor unit power cord connector and a circuit control board. The outdoor unit power cord connector is connected to the circuit control board to supply power to the circuit control board. The connection relationship between the circuit control board and the control circuits of each electrical module on the outdoor unit is as follows: the live wire L is connected to one end of the flow switch and one end of the compressor time delay relay switch. The other end of the flow switch is connected in sequence to the temperature control switch, the high pressure switch, the low pressure switch, and one end of the time delay relay coil. The other end of the compressor time delay relay coil is connected to the neutral wire N. The other end of the compressor time delay relay switch is connected to one end of the compressor and one end of the outdoor fan motor. The other end of the compressor and the other end of the outdoor fan motor are then connected to the neutral wire N.

8. A novel air conditioning device as described in claim 1, characterized in that: The second refrigerant is antifreeze.

9. A novel air conditioning device as described in claim 8, characterized in that: The second refrigerant is an ethylene glycol solution.

10. A novel air conditioning device as described in claim 1, characterized in that: Multiple indoor units are provided, and one outdoor unit is provided. Both ends of the second heat exchange channel of the outdoor unit are connected to a main pipe made of aluminum-plastic pipe. The evaporator of each indoor unit is connected to one end of the second heat exchange channel of the outdoor unit through an aluminum-plastic pipe connected to the main pipe. The tee pipe of each indoor unit is also connected to the other end of the second heat exchange channel of the outdoor unit through an aluminum-plastic pipe connected to the main pipe.

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