Air conditioning system with cold storage device
By introducing a cooling module into the air conditioning system to store and release the cooling capacity, the refrigerant sound, power consumption and frequent start-stop of the air conditioner during cooling operation is solved, and a more efficient and stable operating state and a better user experience is achieved.
Patent Information
- Application Number
- CN202421613312.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-09
- Publication Date
- 2025-06-10
- Estimated Expiration
- 2034-07-09
AI Technical Summary
Existing household air conditioners will produce refrigerant sounds during refrigeration operation, affecting the user experience; the compressor operating frequency is not within the optimal energy efficiency range, resulting in an increase in the system power consumption; the air conditioners frequently start and stop when running at low load, increasing the power consumption and noise, affecting the user experience.
An air conditioning system with a cooling device is designed, including a compressor, an indoor heat exchange, an outdoor heat exchange, a cooling device, a first throttling device and a second throttling device. The cooling module stores and releases the cooling capacity, adjusts the operating status of the air conditioner, and improves energy efficiency and user experience.
Through the participation of the cooling module, the energy efficiency of the air conditioner has been significantly improved, and the operating state is more stable, which reduces power consumption and noise, improves user experience, and helps to cut peaks and fill valleys, reducing the operating costs of the air conditioner.
Smart Images
Figure CN222964066U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of air conditioning, and in particular relates to an air conditioning system with a cold storage device. Background Art
[0002] When a household air conditioner is in cooling operation, the refrigerant flows in the indoor unit's heat exchanger, changing from liquid to gas, absorbing heat due to phase change and supercooling throttling pressure changes, which will produce refrigerant noise and affect the air conditioning experience.
[0003] Most of the current household air conditioners are equipped with variable frequency compressors. The compressor will adjust the operating frequency as the load changes. An operating frequency that is too high or too low is not within the compressor's optimal energy efficiency range, causing an increase in system power consumption and affecting the overall machine energy efficiency.
[0004] When the air conditioner is first turned on, the cooling load is large and the ambient temperature needs to be lowered quickly. The cooling rate of the air conditioner affects the user experience.
[0005] Currently, most areas in my country implement peak-valley electricity prices. Air conditioning operation is real-time electricity consumption. If the peak can be reduced and the valley can be filled, the operating costs of household air conditioners can be saved, which is beneficial to the national electricity regulation.
[0006] When the air conditioner is running at low load, due to the minimum frequency limit of the compressor, it will start and stop frequently when approaching the set temperature, causing the air conditioner to consume more power. In addition, frequent starts and stops will also cause changes in noise, affecting the user experience. Utility Model Content
[0007] In order to solve the problems raised in the above background technology, the utility model provides an air conditioning system with a cold storage device, which has the characteristics of improving air conditioning energy efficiency and stabilizing the operating state.
[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an air-conditioning system with a cold storage device, comprising a compressor, an indoor heat exchanger, an outdoor heat exchanger, a cold storage device, a first throttling device, and a second throttling device, the compressor being connected to the indoor heat exchanger and the outdoor heat exchanger through pipelines, the indoor heat exchanger and the outdoor heat exchanger being connected through pipelines, the cold storage device being connected to the first throttling device through management, the indoor heat exchanger being connected to the second throttling device through pipelines, and the cold storage device, the first throttling device, the indoor heat exchanger, and the second throttling device being connected in parallel.
[0009] Preferably, the indoor heat exchanger is connected to an indoor fan.
[0010] Preferably, the outdoor heat exchanger is connected to an outdoor fan.
[0011] Compared with the prior art, the beneficial effects of the utility model are: a cold storage module is built into the indoor side of the system, and the cold storage and release of the cold storage module participate in the operation of the air conditioner, adjust the operating state of the air conditioner, improve user comfort, improve air conditioning energy efficiency, and save energy and reduce emissions. Brief Description of the Drawings
[0012] Figure 1 is a schematic structural diagram of the present utility model;
[0013] In the figure: compressor 1, outdoor heat exchanger 2, outdoor fan 3, first throttling device 4, second throttling device 5, cold storage device 6, indoor heat exchanger 7, indoor fan 8, temperature sensor 9. Detailed Description of the Preferred Embodiments
[0014] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.
[0015] Please refer to Figure 1 , the present utility model provides the following technical solutions: An air conditioning system with a cold storage device, including a compressor 1, an outdoor heat exchanger 2, an outdoor fan 3, a first throttling device 4, a second throttling device 5, a cold storage device 6, an indoor heat exchanger 7, and an indoor fan 8. The compressor 1 is connected to the indoor heat exchanger 7 and the outdoor heat exchanger 2 through pipelines. The indoor heat exchanger 7 and the outdoor heat exchanger 2 are connected through pipelines. The cold storage device 6 is connected to the first throttling device 4 through a pipeline. The indoor heat exchanger 7 is connected to the second throttling device 5 through a pipeline. The cold storage device 6, the first throttling device 4 are in parallel with the indoor heat exchanger 7 and the second throttling device 5. The indoor heat exchanger 7 is connected to the indoor fan 8. The outdoor heat exchanger 2 is connected to the outdoor fan 3. The cold storage module 6 stores a cold storage substance with a melting point of 6 - 8 °C.
[0016] Introduction to the working mode of the air conditioning system of this patent:
[0017] 1. Normal refrigeration mode of the air conditioner
[0018] The high-temperature and high-pressure gaseous refrigerant compressed by the compressor 1 enters the outdoor heat exchanger 2 from the compressor 1, and becomes a high-pressure liquid refrigerant after condensation. It enters the room through the liquid pipe connection pipe. At this time, the second throttling device 5 is opened, and the first throttling device 4 is closed. The refrigerant becomes a low-temperature liquid after throttling, and becomes a low-temperature gas after heat exchange in the indoor heat exchanger 7, and returns to the compressor 1 through the gas pipe connection pipe. After being compressed by the compressor 1, it enters the next cycle. At this time, since the first throttling device 4 is closed, there is no refrigerant flow in the cold storage device 6, and it does not participate in refrigeration.
[0019] 2. Cold storage mode of the cold storage module
[0020] During cold storage, the high-temperature and high-pressure gaseous refrigerant compressed by the compressor 1 enters the outdoor heat exchanger 2 from the compressor 1. After condensation, it becomes high-pressure liquid and enters the room through the liquid pipe connection pipe. At this time, the second throttling device 5 is closed and the first throttling device 4 is opened. The refrigerant becomes low-temperature liquid after throttling, exchanges heat in the cold storage module 6, stores the cold energy in the cold storage module 6, becomes low-temperature gas after heat exchange, returns to the compressor 1 on the outdoor side through the gas pipe connection pipe, and enters the next cycle after being compressed by the compressor 1. The temperature sensor 9 monitors the temperature of the refrigerant flowing out of the cold storage module 6 in real time. When the detected temperature is lower than the melting point △t1 of the substance in the cold storage module 6 (determined by test adjustment), the first throttling device 4 is closed and the cold storage stops.
[0021] 3. Cold release mode of the cold storage module
[0022] The cold storage module 6 releases cold energy. The compressor 1 and the outdoor fan 3 stop running, and only the indoor fan 8 runs. The temperature sensor 9 monitors the temperature of the refrigerant flowing out of the cold storage module 6 in real time. When the detected temperature is higher than the melting point △t2 of the substance in the cold storage module 6 (determined by test adjustment), the cold release of the cold storage module 6 ends.
[0023] 4. Refrigeration operation + cold storage mode of the cold storage module
[0024] The air conditioner operates in the normal refrigeration mode, and both the first throttling device 4 and the second throttling device 5 are opened. Part of the refrigerant enters the cold storage module 6 through the first throttling device 4. The low pressure of the refrigerant in the cold storage module 6 is adjusted by adjusting the first throttling device 4 to make the evaporation saturation temperature lower than the melting point of the substance in the cold storage module 6. The system monitors the temperature detected by the temperature sensor 9 in real time. When the detected temperature is lower than the melting point △t1 of the substance in the cold storage module 6 (determined by test adjustment), the cold storage of the cold storage module 6 ends. By adjusting the first throttling device 4 and the second throttling device 5, the cold storage module 6 is always in a saturated cold storage state. The refrigerant entering the indoor heat exchanger 7 through the second throttling device 5 operates according to the normal refrigeration cycle.
[0025] 5. Refrigeration operation + cold release mode of the cold storage module
[0026] The cold energy has been stored in the cold storage module 6. The air conditioner operates in the normal refrigeration mode. The first throttling device 4 is opened and the second throttling device 5 is closed. The indoor fan 8 runs. The indoor return air first passes through the indoor heat exchanger 7, is cooled down and then flows through the cold storage module 6. At this time, since the temperature of the air passing through the indoor heat exchanger 7 is still higher than the temperature of the cold storage module 6, the indoor air exchanges heat with the cold storage module 6 and is further cooled down. When the temperature detected by the temperature sensor 9 is higher than the melting point △t2 of the substance in the cold storage module 6 (determined by test adjustment), the cold release of the cold storage module 6 ends and it enters the refrigeration operation mode.
[0027] Through the above operation modes, the air conditioner can better adapt to the operating environment. For example:
[0028] For users with time-of-use electricity pricing, the cold storage module can operate in the cold storage mode during the period of low electricity charges at night to store cold, and then release the cold during the day, reducing the operating cost of the air conditioner.
[0029] For the situation where the air conditioner needs to rapidly cool down when it is just started up, the refrigeration operation + cold release mode of the cold storage module can be operated to rapidly cool down when the cooling load of the air conditioner is large, improving the user experience.
[0030] For the situation where the cooling load is small, the minimum cooling capacity of the normal operation of the air conditioner exceeds the cooling load, which will cause the compressor to start and stop frequently. At this time, the refrigeration operation + cold storage mode of the cold storage module can be operated to store the excess cold of the air conditioner in the cold storage module, preventing the compressor from starting and stopping frequently.
[0031] For users with relatively high requirements for the noise of the air conditioner, the cold storage module can be set to automatically operate in the cold storage mode to store cold when there is no one. When people arrive, the cold release mode of the cold storage module is adopted. Since only the fan is running at this time, there are no abnormal noises such as refrigerant phase change, throttling, and compressor transmission noise in the system operation.
[0032] For a conventional air conditioner, the compressor frequency will fluctuate up and down with the load when the cooling load changes in real time. For an air conditioner with an internal cold storage module, due to the existence of the cold storage module, the compressor frequency can be stably operated in the high-efficiency range. When the cooling load becomes smaller, the refrigeration operation + cold storage mode of the cold storage module is operated to maintain the compressor operation frequency, and the excess cold is stored through the cold storage module. When the cooling load becomes larger, the refrigeration operation + cold release mode of the cold storage module is operated to maintain the compressor operation frequency, and the required cold is released through the cold storage module.
[0033] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. An air conditioning system with a cold storage device, characterized in that: It includes a compressor, an indoor heat exchanger, an outdoor heat exchanger, a cold storage device, a first throttling device, and a second throttling device. The compressor is connected to the indoor heat exchanger and the outdoor heat exchanger through pipelines, the indoor heat exchanger is connected to the outdoor heat exchanger through pipelines, the cold storage device is connected to the first throttling device through pipelines, the indoor heat exchanger is connected to the second throttling device through pipelines, and the cold storage device, the first throttling device, the indoor heat exchanger, and the second throttling device are connected in parallel.
2. An air conditioning system with a cold storage device according to claim 1, characterized in that: The indoor heat exchanger is connected to the indoor fan.
3. The air conditioning system with a cold storage device according to claim 1, characterized in that: The outdoor heat exchanger is connected to an outdoor fan.
Citation Information
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