Air conditioning system

Abstract

The utility model provides an air-conditioning system which comprises a compressor, a four-way valve and an outdoor heat exchanger, the four-way valve is communicated with the outdoor heat exchanger through a first communicating pipe, the air-conditioning system further comprises a heat exchange device, the heat exchange device comprises a water tank and a spraying head, a heat exchange part is arranged on the first communicating pipe, and the spraying head is arranged on the water tank. The heat exchange part is arranged in the water tank, the spraying head is located above the heat exchange part, and the spraying head selectively communicates with a high-temperature water source or a low-temperature water source through a water inlet pipe, so that the technical problem that in the prior art, the service life of an outdoor heat exchanger is shortened due to the fact that the outdoor heat exchanger exchanges heat with external water to adjust the refrigerant temperature is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of air conditioning, and in particular relates to an air conditioning system. Background Art

[0002] Air conditioning systems often face extreme weather conditions during operation. Energy efficiency and reliability vary depending on the outdoor ambient temperature. For example, cooling at high temperatures can result in high pressure on the air conditioning system, poor energy efficiency, and frequent frequency reduction during oil return and normal operation. In these cases, enhanced heat transfer in the outdoor heat exchanger is necessary to reduce the refrigerant temperature. However, outdoor heat exchangers are fixed and cannot be arbitrarily increased. Designing for a larger outdoor heat exchanger would be costly and significantly increase installation difficulty. Furthermore, an oversized heat exchanger would not meet actual capacity requirements during low-load operation, compromising performance and reliability. During heating, cold temperatures can cause frequent frost on the outdoor heat exchanger, further impairing heat transfer. During defrosting, the high-temperature refrigerant condenses in the outdoor heat exchanger, becoming very cold and difficult to circulate within the system quickly. This results in low indoor unit air temperatures for a long time after defrosting, resulting in poor heating comfort.

[0003] To solve this problem, the existing technology cools or heats the outdoor heat exchanger by spraying water. However, this technology has high requirements on water quality, and the fins of the outdoor heat exchanger will be corroded, which will affect the life of the unit.

[0004] How to adjust the refrigerant temperature in the system without affecting the quality of the outdoor heat exchanger is a technical problem that needs to be solved urgently. Utility Model Content

[0005] Therefore, the utility model provides an air-conditioning system that can solve the technical problem in the prior art that the life of the outdoor heat exchanger is shortened due to heat exchange between the outdoor heat exchanger and external water to adjust the refrigerant temperature.

[0006] The utility model provides an air-conditioning system, including a compressor, a four-way valve and an outdoor heat exchanger, wherein the four-way valve is connected to the outdoor heat exchanger via a first connecting pipe. The air-conditioning system also includes a heat exchange device, which includes a water tank and a spray head. A heat exchange part is provided on the first connecting pipe, and the heat exchange part is arranged in the water tank. The spray head is located above the heat exchange part. The spray head can be selectively connected to a high-temperature water source or a low-temperature water source via a water inlet pipe.

[0007] In some embodiments, a drainage hole is provided at the bottom of the sink.

[0008] In some embodiments, a drain pipe is provided on the drain hole, and a water outlet valve is provided on the drain pipe.

[0009] In some embodiments, the heat exchange portion includes a plurality of fins disposed on the first connecting tube.

[0010] In some embodiments, a plurality of the shower heads are provided, and the plurality of shower heads are evenly arranged above the plurality of fins.

[0011] In some embodiments, the outdoor heat exchanger is provided with an ambient temperature sensing package and a defrost temperature sensing package.

[0012] In some embodiments, the heat exchange portion is made of copper.

[0013] In some embodiments, the heat exchange portion is detachably disposed on the first connecting pipe.

[0014] In some embodiments, an oil separator is provided between the compressor and the four-way valve, and a high-pressure sensor is provided at an outlet of the oil separator.

[0015] In some embodiments, the air conditioning system has an automatic mode and a manual mode.

[0016] The utility model sets a heat exchange device between the four-way valve and the outdoor heat exchanger, introduces external high-temperature water or low-temperature water into the water tank through the water tank and the sprinkler head, heats or cools the first pipe passing through the water tank, and thus achieves the purpose of regulating the temperature of the refrigerant. Since the external water does not contact the outdoor heat exchanger, it will not have an adverse effect on the outdoor heat exchanger. Both high-temperature water and low-temperature water can use industrial water, which is beneficial to saving energy and improving the working efficiency of the air-conditioning system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the embodiments or the description of the prior art. The drawings described below are merely exemplary. For those skilled in the art, other implementation drawings can be derived from the provided drawings without inventive effort.

[0018] Figure 1 This is a schematic diagram of an air conditioning system according to an embodiment of the present utility model;

[0019] Figure 2 This is a flowchart of the working process in the cooling mode of an embodiment of the utility model;

[0020] Figure 3 This is a flowchart of the working process in the heating mode of an embodiment of the utility model;

[0021] The accompanying drawings are:

[0022] 1. Compressor; 2. Four-way valve; 301. Outdoor heat exchanger; 302. Indoor heat exchanger; 401. First connecting pipe; 402. Second connecting pipe; 5. Sprinkler head; 6. Sink; 601. Drain pipe; 602. Outlet valve; 603. Fins; 701. Ambient temperature sensor; 702. Defrosting temperature sensor; 703. Water pump; 704. Outdoor fan; 705. Oil separator; 706. Steam separator; 707. Inlet temperature sensor; 708. Outlet temperature sensor; 709. Low pressure sensor; 710. High pressure switch; 711. Exhaust temperature sensor; 712. Heating EXV; 713. High pressure sensor; 714. Oil return solenoid valve. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] In the description of the present invention, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0025] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0026] In addition, it should be noted that the use of words such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of this utility model.

[0027] See also Figure 1 As shown, the air-conditioning system includes a compressor 1, a four-way valve 2 and an outdoor heat exchanger 301. The four-way valve 2 is connected to the outdoor heat exchanger 301 via a first connecting pipe 401. The air-conditioning system also includes a heat exchange device, which includes a water tank 6 and a spray head 5. A heat exchange part is provided on the first connecting pipe 401, and the heat exchange part is arranged in the water tank 6. The spray head 5 is located above the heat exchange part. The spray head 5 can be selectively connected to a high-temperature water source or a low-temperature water source through a water inlet pipe.

[0028] The present application provides a heat exchange unit on the first connecting pipe 401, and the spray head 5 sprays high-temperature or low-temperature water. The high-temperature or low-temperature water is sprayed onto the heat exchange unit for heat exchange, thereby heating or cooling the refrigerant in the first connecting pipe 401. This eliminates the need for heat exchange with external high-temperature or low-temperature water through the external outdoor heat exchanger 301, thus avoiding the quality degradation caused by contact between the outdoor heat exchanger 301 and the external water. Since the external water contacts the dedicated heat exchange unit, there are no special requirements for water quality. For example, industrial wastewater (high-temperature or low-temperature water) can be directly used. When industrial wastewater is high-temperature water, the refrigerant temperature can be increased, enhancing the defrosting effect and increasing the heat exchange rate. Heating or cooling the refrigerant through the heat exchange unit allows the refrigerant flowing back to the compressor 1 to be at a lower temperature during cooling, and the refrigerant flowing back to the compressor 1 to be at a higher temperature during heating, which is beneficial for improving the operating performance and efficiency of the compressor 1 and the user experience. There is no need for heat exchange with external temperature-controlled water through the outdoor heat exchanger 301, which helps to ensure the life of the outdoor heat exchanger 301.

[0029] Preferably, a drainage hole is provided at the bottom of the water tank 6 .

[0030] The water after heat exchange with the heat exchange part is first collected in the water tank 6 and then discharged through the drainage hole to prevent the water after heat exchange from flowing everywhere and causing pollution.

[0031] Preferably, a drain pipe 601 is provided on the drain hole, and a water outlet valve 602 is provided on the drain pipe 601.

[0032] The water outlet valve 602 can be used to adjust the rate at which water flows out of the water tank 6. When the amount of water sprayed by the shower head 5 is sufficient, the outlet valve 602 can be opened wider so that the heat exchange unit is covered with water but not immersed in water. This facilitates evaporation of water on the surface of the heat exchange unit during cooling, and ensures that there is always incoming water (at a higher temperature) in contact with the heat exchange unit to heat it during heating. When the amount of water sprayed by the shower head 5 is insufficient, the outlet valve 602 can be opened narrower so that the entire heat exchange unit is immersed in water, allowing for sufficient heat exchange between the heat exchange unit and the water.

[0033] Preferably, the heat exchange portion includes a plurality of fins 603 provided on the first connecting pipe 401 .

[0034] The multiple fins 603 increase the heat exchange area between water and solid, which is beneficial for the refrigerant to absorb heat from water or release heat to water.

[0035] Preferably, a plurality of the spray heads 5 are provided, and the plurality of the spray heads 5 are evenly arranged above the plurality of the fins 603 .

[0036] The multiple spray heads 5 are evenly arranged above the multiple fins 603 , which is conducive to more uniform heat exchange between water and the fins 603 .

[0037] Preferably, the outdoor heat exchanger 301 is provided with an ambient temperature sensing package 701 and a defrost temperature sensing package 702 .

[0038] Furthermore, a water pump 703 is provided on the water inlet pipe. By providing the ambient temperature sensor 701, the air conditioning system can control the power of the water pump 703 according to the external ambient temperature. For example, when cooling, the lower the external ambient temperature, the greater the power of the water pump 703; when heating, the lower the external ambient temperature, the greater the power of the water pump 703.

[0039] The outdoor heat exchanger 301 is further provided with an outdoor fan 704, and the rotation speed of the outdoor fan 704 can also be changed according to changes in the outdoor temperature.

[0040] Similarly, by setting the defrost temperature sensing package 702, when defrosting is required, the power of the compressor 1 is adjusted according to the temperature detected by the defrost temperature sensing package 702, which can not only effectively defrost but also prevent the indoor temperature from being too low.

[0041] Preferably, the heat exchange part is made of copper.

[0042] By making the heat exchange part out of copper, the heat exchange efficiency between water and the heat exchange part is improved by utilizing the high thermal conductivity of copper, and the service life of the heat exchange part is extended by utilizing the corrosion resistance of copper.

[0043] Preferably, the heat exchange part is detachably arranged on the first connecting pipe 401.

[0044] The heat exchange part is detachable, which, on the one hand, improves maintainability and facilitates later maintenance; on the other hand, it can be produced in a modular manner and heat exchange parts of different specifications can be set according to user needs.

[0045] Preferably, an oil separator 705 is provided between the compressor 1 and the four-way valve 2 , and a high-pressure sensor 713 is provided at the outlet of the oil separator 705 .

[0046] The high-pressure sensor 713 at the outlet of the oil separator 705 can timely and effectively judge the pressure of the system. If the pressure is too high, the working power of the compressor 1 and the water spraying speed of the sprinkler head 5 can be adjusted in time.

[0047] Preferably, the air conditioning system has an automatic mode and a manual mode.

[0048] In automatic mode, the air conditioning system is controlled according to a pre-set program; when the pre-set program cannot meet user needs, the air conditioning system can be controlled in manual mode.

[0049] Automatic mode in cooling mode: Figure 2 As shown, during unit operation, if high temperature or high pressure occurs, affecting normal cooling, such as when the ambient temperature exceeds 50°C or the system pressure exceeds 3.2 MPa, sprinkler head 5 is opened to cool the refrigerant, improving the unit's cooling capacity and its ability to cope with high temperatures and high pressures. Because compressor 1 needs to operate at high frequencies during system oil return, which significantly increases the system high pressure, a high-temperature oil return pre-judgment function is set to activate the oil return function. Before oil return begins, if the ambient temperature or refrigerant pressure exceeds a certain value, such as when the ambient temperature exceeds 48°C or the system pressure exceeds 3.0 MPa, sprinkler head 5 is opened.

[0050] Automatic mode in heating mode: Figure 3As shown, when the unit is running, if the ambient temperature is relatively low (not higher than 0°C) and the system operating low pressure is also low (lower than 0.577MPa, corresponding to a saturation temperature of -10°C), the unit will turn on the sprinkler head 5, and the heat of high-temperature water such as industrial wastewater will be used to heat the refrigerant to improve the heating capacity of the unit. Otherwise, the unit will maintain the previous operating mode and continue to operate. When defrosting is required, before the unit enters the defrost mode, it will predict the possible situations that may occur during defrosting. If the ambient temperature is low (lower than 0°C) and the refrigerant pressure is very low (lower than 0.577MPa) before defrosting, the frost layer may be very thick, so fast and efficient defrosting is required. It is necessary to open the sprinkler head 5, and the high-temperature water heats the refrigerant to improve the defrosting effect, avoid long defrosting time and incomplete frost removal.

[0051] In manual mode, the user can manually control whether to start the spray according to the actual situation. After manual start, the spray will remain in working state.

[0052] like Figure 1 As shown, the air conditioning system also includes an indoor unit and a steam separator 706. An inlet pipe temperature sensor 707 and a low-pressure sensor 709 are installed on the inlet pipe of the steam separator 706, and an outlet pipe temperature sensor 708 is installed on the outlet pipe of the steam separator 706. An oil return solenoid valve 714 is installed on the oil return pipe of the oil separator 705, and a high-pressure switch 710 and an exhaust temperature sensor 711 are installed at the outlet of the compressor 1. A heating EXV 712 (EVX stands for electronic expansion valve) is installed on the second connecting pipe 402 between the outdoor heat exchanger 301 and the indoor heat exchanger 302.

[0053] It is easy for those skilled in the art to understand that, under the premise of no conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention. The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention. Such improvements and variations shall also be considered within the scope of protection of the present invention.

Claims

1. An air conditioning system comprising a compressor (1), a four-way valve (2) and an outdoor heat exchanger (301), wherein the four-way valve (2) and the outdoor heat exchanger (301) are connected via a first connecting pipe (401), characterized in that: The air conditioning system further comprises a heat exchange device, the heat exchange device comprising a water tank (6) and a spray head (5), a heat exchange portion is provided on the first connecting pipe (401), the heat exchange portion is provided in the water tank (6), the spray head (5) is located above the heat exchange portion, and the spray head (5) can be selectively connected to a high-temperature water source or a low-temperature water source via a water inlet pipe.

2. The air conditioning system according to claim 1, characterized in that The bottom of the water tank (6) is provided with a drainage hole.

3. The air conditioning system according to claim 2, characterized in that A drainage pipe (601) is provided on the drainage hole, and a water outlet valve (602) is provided on the drainage pipe (601).

4. The air conditioning system according to claim 1, characterized in that The heat exchange portion includes a plurality of fins (603) arranged on the first connecting pipe (401).

5. The air conditioning system according to claim 4, characterized in that A plurality of the spray heads (5) are provided, and the plurality of the spray heads (5) are evenly arranged above the plurality of the fins (603).

6. The air conditioning system according to claim 1, characterized in that The outdoor heat exchanger (301) is provided with an environmental temperature sensing package (701) and a defrosting temperature sensing package (702).

7. The air conditioning system according to claim 1, characterized in that The heat exchange part is made of copper.

8. The air conditioning system according to claim 1, characterized in that The heat exchange portion is detachably arranged on the first connecting pipe (401).

9. The air conditioning system according to claim 1, characterized in that An oil separator (705) is provided between the compressor (1) and the four-way valve (2), and a high-pressure sensor (713) is provided at the outlet of the oil separator (705).

10. The air conditioning system according to any one of claims 1 to 9, characterized in that: The air conditioning system has an automatic mode and a manual mode.

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