A multi-mode fresh air conditioner integrating cold storage and heat storage and its control method

Abstract

This invention provides an integrated multi-mode fresh air conditioner with cold and heat storage. The air conditioner includes a cooling and heating cycle system, a cold and heat storage cycle system, a temperature acquisition module, and a control system. The cooling and heating cycle system includes a cooling and heating branch, a cold and heat storage branch, and an air supply and heat exchange branch. The cooling and heating branch stores cold or heat energy in the cold and heat storage cycle system through the cold and heat storage branch. The cold and heat storage cycle system is also used to release the stored cold or heat energy. The control system is used to switch between multiple modes based on the temperature acquired by the temperature acquisition module and to control the coordinated operation of each module during mode switching. Compared with the prior art, this invention provides both cold and heat storage functions for the air conditioner and controls multiple branches and circulation modules of the air conditioning system. Different modes control the operation of different branches or circulation modules, making the air conditioner control modular and allowing for more flexible combinations of modes.

Description

Technical Field

[0001] This invention relates to the field of fresh air conditioning, and more specifically, to a multi-mode fresh air conditioning system with integrated cold and heat storage and its control method. Background Technology

[0002] Under the vision of "peak carbon and carbon neutrality," and driven by multiple markets such as renewable energy consumption, clean heating, thermal power plant renovation, integrated energy services, and green cooling, the market space for various types of thermal and cold storage technologies continues to expand. Thermal and cold storage involves storing heat and cold energy using specific technologies, releasing the stored energy through system circulation for reuse when needed. Air conditioning systems with thermal and cold storage capabilities can fully utilize the low-priced electricity under peak-valley pricing policies, significantly reducing operating costs. Simultaneously, the system can avoid peak-scarce periods, achieving peak-shifting and valley-filling of the power grid, and avoiding power outages during peak hours. Currently, the main method of thermal storage in my country is the use of electric boilers. This involves using electric boilers as a heat source, utilizing cheap off-peak electricity to heat water, and storing the heated water in a hot water tank. During peak power hours, the electric boiler is shut down, and the stored hot water provides heating. This method does not integrate thermal and cold storage.

[0003] Based on this, existing 100% fresh air conditioning units generally use direct evaporative cooling via compressors to cool the air. Because they lack cold storage capabilities, the compressors can only operate at full capacity, failing to consider energy savings through cold storage. This results in high overall power consumption for the air conditioning units, failing to meet carbon peaking and carbon neutrality requirements. In terms of heating, current 100% fresh air conditioning units mainly rely on electric heating or heat pumps for direct heating, lacking heat storage capabilities. This also leads to high power consumption during heating operation, failing to meet energy-saving requirements. Furthermore, air conditioning units using coal-fired boilers for hot water heating cause environmental pollution throughout the system. Additionally, some air conditioning units in specialized fields are equipped with cold storage functions, but they use non-direct cold storage and release methods. This results in the unit being unable to store cold air during direct cooling or supplying cold air, or losing the direct cooling and supplying cold air function during cold storage, limiting the unit's application range. Summary of the Invention

[0004] The present invention aims to overcome at least one of the defects of the prior art and provide an integrated cold storage and heat storage multi-mode fresh air conditioner and its control method, which is used to provide an air conditioner and corresponding control method that integrates cold storage and heat storage and other multi-mode coordinated operation, and can save energy and reduce electricity costs.

[0005] The technical solution adopted in this invention is:

[0006] This invention provides an integrated cold and heat storage multi-mode fresh air conditioner.

[0007] The air conditioner includes a refrigeration and heating cycle system, a cold and heat storage cycle system, a temperature acquisition module, and a control system.

[0008] The cooling and heating cycle system includes a cooling and heating branch, a cold storage and heat storage branch, and an air supply and heat exchange branch; the cold storage and heat storage branch and the cooling and heating branch are connected to form a cold storage and heat storage cycle loop, and the air supply and heat exchange branch and the cooling and heating branch are connected to form a cooling and heating cycle loop.

[0009] The cold and heat storage branch includes a heat exchange coil, and the cold and heat storage circulation system includes a cold and heat storage tank. The heat exchange coil is installed in the cold and heat storage tank, and the heat exchange coil stores cold or heat in the cold and heat storage tank by exchanging heat with the refrigerant in the cold and heat storage tank.

[0010] The cold and heat storage circulation system is used to release the stored cold or heat to achieve cooling or heating functions.

[0011] The temperature acquisition module is used to collect the air intake and supply temperatures of the air conditioner and the temperature of the cold storage and heat storage tank in real time.

[0012] The control system is used to switch between multiple modes based on the temperature data collected by the temperature acquisition module, and to control the coordinated operation of each module when switching modes.

[0013] The control system is configured with a first mode state and a second mode state;

[0014] The first mode states include standby mode, power-on mode, and power-off mode;

[0015] The second mode includes one or a combination of cold storage, cold storage / cold release, cold release or refrigeration modes and one or a combination of heat storage, heat storage / heat release, heat release or heating modes;

[0016] The control system operates in a mode that is a combination of the first mode state and the second mode state.

[0017] When the second mode state of the control system includes cold storage or heat storage, the refrigerant is controlled to pass through the cold storage or heat storage branch; when the second mode state of the control system includes cold release or heat release, the cold storage or heat storage cycle system is controlled to perform a cold release cycle or a heat release cycle; when the second mode state of the control system includes cooling or heating, the refrigerant is controlled to pass through the air supply heat exchange branch.

[0018] This invention, by setting up cold storage and heat exchange branches and air supply heat exchange branches, can achieve simultaneous cold storage and cooling. It also features a separate cold storage and heat storage circulation system that can release stored cold or heat. Through the cold storage and heat storage branches, a portion of the cold or heat used daily can be stored, or stored when the ambient temperature is below or above the storage temperature of the cold storage and heat storage circulation system, and when air conditioning is not required. This stored cold or heat can then be used during peak electricity consumption periods or when electricity prices are at their lowest. This utilizes ambient temperature... The system stores energy through the daily operation of the air conditioner, greatly improving energy utilization. Furthermore, the power consumption of the cold and heat storage circulation system is lower than that of the air conditioner itself. By storing and releasing cold and heat through the system, peak-hour power consumption is achieved. During periods of high electricity demand, the system can utilize the stored cold or heat for heat exchange, avoiding the risk of tripping due to the simultaneous use of numerous high-power appliances. This also saves electricity, meeting the requirements of "carbon neutrality." Additionally, it avoids peak-hour power consumption during off-peak periods, saving on electricity bills. Moreover, this invention provides a separate cold and heat storage branch and circulation system for cold or heat storage, enabling the air conditioner to simultaneously store cold and cool, thus improving its efficiency.

[0019] Furthermore, the cooling and heating branch includes:

[0020] The first flow regulation module, the first cooling and heating switching module, the cooling and heating exchange module, the second flow regulation module, and the second cooling and heating switching module are connected in sequence through pipelines.

[0021] One end of the cooling and heating branch is connected to one end of the cold storage and heat storage branch and one end of the air supply and heat exchange branch through the first flow regulation module; the other end of the cooling and heating branch is connected to the other end of the cold storage and heat storage branch and the other end of the air supply and heat exchange branch through the second cooling and heating switching module.

[0022] The control system achieves the switching between cooling and heating by controlling the first cooling and heating switching module and the second cooling and heating switching module to change the flow direction of refrigerant in the cooling and heating branch.

[0023] The refrigeration and heating branch exchanges heat with the refrigerant passing through the refrigeration and heating branch through a refrigeration and heating exchange module.

[0024] The control system regulates the refrigerant flow rate in the cooling and heating branch through a first flow regulation module and a second flow regulation module, as well as the flow rate from the cooling and heating branch to the cold storage and heat storage branch and the air supply and heat exchange branch. Preferably, the cooling and heating exchange module includes a heat exchanger for exchanging heat with the refrigerant passing through the cooling and heating branch.

[0025] Furthermore, the cold and heat storage branch includes a heat exchange coil; the cold and heat storage circulation system includes a cold and heat storage tank; the heat exchange coil is installed in the cold and heat storage tank and connected to the cooling and heating branch;

[0026] The heat exchange coil stores cold or heat in the cold storage tank by exchanging heat with the refrigerant in the cold storage tank.

[0027] The temperature acquisition module is used to collect the temperature of the refrigerant in the cold storage tank in real time.

[0028] Preferably, the cold storage tank includes a distributor, a refrigerant inlet, a refrigerant outlet, and a liquid level vent valve; the refrigerant inlet and outlet of the cold storage tank are connected to the circulating pump, adjustable heating tube, and first heat exchanger via pipelines to form a cold storage circulation system; the distributor is connected to the refrigerant inlet and is located at the top of the cold storage tank, so that the refrigerant is evenly distributed to the top of the refrigerant liquid level corresponding to the heat exchange coil; the liquid level vent valve is used to replenish the refrigerant and balance the gas pressure of the cold storage tank;

[0029] Furthermore, the cold and heat storage circulation system also includes a circulation pump, an adjustable heating tank, and a first heat exchanger;

[0030] The cold storage tank, the circulating pump, the adjustable heating tank, and the first heat exchanger are connected in sequence through pipelines to form a circulation loop.

[0031] When the cold storage and heat storage circulation system performs a cold release cycle or a heat release cycle, the circulation pump delivers the refrigerant in the cold storage and heat storage tank to the first heat exchanger for heat exchange.

[0032] The preferred circulating pump is a variable frequency circulating pump. In the cold storage and heat storage circulation system, the circulating pump replaces the compressor in the air conditioning system, and the overall structure is simple, reducing the power required for operation. In addition, the adjustable heating tank can urgently heat the refrigerant in the cold storage and heat storage circulation system when the air conditioner fails and cannot provide heating. Then the refrigerant exchanges heat with the fresh air to achieve the function of emergency heating in case of failure.

[0033] Furthermore, the air supply and heat exchange branch includes a second heat exchanger and an air supply fan. The second heat exchanger and the air supply fan are connected by a pipeline and are respectively connected to both ends of the cooling and heating branch. The air supply fan also provides air supply power to the first heat exchanger.

[0034] This invention also provides a control method for an integrated cold and heat storage multi-mode fresh air conditioner. The control method is based on the aforementioned integrated cold and heat storage multi-mode fresh air conditioner and includes:

[0035] S1: Set the mode to determine the temperature in the control system;

[0036] S2: Receive user input commands;

[0037] S3: Set the first mode state according to the user's input command;

[0038] S4: Set the second mode state based on the user input command, the temperature information collected by the temperature acquisition module, the mode determination temperature, and the first mode state.

[0039] Furthermore, the temperature determination method for the setting mode includes:

[0040] Set the cold state setting value T 1h Thermal state setpoint T 1d Cold storage state setpoint T 3d Thermal storage state setpoint T 3h 1. Cold storage hysteresis setpoint Δt 3d and thermal storage hysteresis setpoint Δt 3h .

[0041] Furthermore, the step of setting the second mode state based on the user-input command, the temperature information collected by the temperature acquisition module, the mode determination temperature, and the first mode state specifically involves:

[0042] S401: The temperature acquisition module acquires the air inlet temperature T1 of the air conditioner and the refrigerant temperature T3 of the cold storage tank.

[0043] S402: Determine the first mode state input by the user. If the first mode state is standby state, execute step S403; if the first mode state is power-on state, execute step S407.

[0044] S403: Determine T1 and T 1h The size, when T1>T 1h When T1 ≤ T, execute step S404; 1h When the time comes, proceed to step S405;

[0045] S404: Determine if T3 and T 3d The size, when T3≤T 3d When T3 > T, execute step S4A; 3d At that time, execute step S4B;

[0046] S405: Determine T1 and T2 1d The size when T1 <T 1d When T1≥T, proceed to step S406; 1d When the time comes, execute step S3A;

[0047] S406: Determine T3 and T3h The size, when T3≥T 3h When T3 is reached, step S3C is executed; when T3 is reached... <T 3h When the time comes, execute step S3A;

[0048] S407: Determine T1 and T 1h The size, when T1>T 1h When T1 ≤ T, proceed to step S408; 1h When the time comes, proceed to step S410;

[0049] S408: Determine whether the user input request is in a completely cold state. If yes, proceed to step S3H; otherwise, proceed to step S409.

[0050] S409: Determine T3 and T 3d The size, when T3≤T 3d When T3 > T, execute step S3D; 3d At that time, execute step S3E;

[0051] S410: Determine T1 and T 1d The size when T1 <T 1d When T1≥T, execute step S3J; 1d When the time comes, proceed to step S411;

[0052] S411: Determine if the cooling / heating branch is faulty. If it is faulty, proceed to step S3K; if it is not faulty, proceed to step S412.

[0053] S412: Determine whether the user input request is in a fully hot state. If yes, proceed to step S3I; otherwise, proceed to step S413.

[0054] S413: Determine if T3 and T 3h The size, when T3≥T 3h When T3 is reached, step S3F is executed; when T3 is reached... <T 3h At that time, execute step S3G;

[0055] S4A: The system is set to power off in the first mode.

[0056] S4B: The system is set to the second mode, cold storage, until it is determined that T3≤T 3d When the time comes, execute step S3A;

[0057] S4C: The system is set to the second mode, thermal storage, until T3 is determined. <T 3h When the time comes, execute step S3A;

[0058] S4D: The system is set to the second mode of cooling until it determines whether T3 > T. 3d +Δt3d At that time, execute step S3E;

[0059] S4E: The system is set to the second mode state as cold storage + cooling, until it is determined that T3≤T 3d When the time comes, execute step S3D;

[0060] S4F: The system is set to the second mode state as heat dissipation until T3 is determined. <T 3h -Δt 3h At that time, execute step S3G;

[0061] S4G: The system is set to the second mode state as thermal storage + heating, until it is determined that T3 ≥ T. 3h When the time comes, proceed to step S3F;

[0062] S4H: The system is set to the second mode state as cold storage / cold release + cooling;

[0063] S4I: The system is set to the second mode status as heat storage / heat release + heating;

[0064] S4J: The system is set to ventilation mode as the second mode.

[0065] S4K: The system is set to emergency fault mode.

[0066] The first mode is primarily set manually, where the user inputs "on," "standby," or "off." The first mode can also be set by the system, such as a timed on / off cycle. In the second mode, the user inputs either "full cooling" or "full heating." If the user input corresponds to a specific mode, the air conditioner's second mode is set to either "cold storage / cooling release + cooling" or "heat storage / heat release + heating." If no user input is received, the second mode can be set by the system. The system calculates the appropriate combination based on the specific temperature value determined by the mode and the real-time temperature collected by the temperature acquisition mode. The user-inputted second mode takes precedence over the system's automatic setting; that is, if the system sets a second mode, it can be overridden by manual setting. This combination of manual and automatic settings allows the system to intelligently set and switch between cold storage and cooling modes when no manual settings are required. It intelligently coordinates the system to operate in an optimal energy-saving and power-efficient state, significantly reducing electricity consumption and improving energy utilization. Furthermore, combining manual settings with automatic settings makes mode configuration more flexible.

[0067] Furthermore, the ventilation mode and emergency fault mode are specifically as follows: in the ventilation mode, the cold storage and heat storage circulation system and the cooling and heating circulation system stop operating, and only the air supply fan is turned on;

[0068] The fault emergency mode is as follows: when T1 <T 1d When the cooling and heating cycle system fails to perform heating work normally, the second mode is set to the fault emergency mode. In this mode, the adjustable heating tank is controlled to heat the refrigerant in the cold storage and heat storage cycle system.

[0069] The emergency fault mode can be set up so that when the cooling and heating cycle system cannot perform heating work normally, such as when the compressor is damaged or there is a problem with the pipeline, the adjustable heating tank can be started to heat the refrigerant flowing through the adjustable heating tank, and then the refrigerant can be heated to heat the fresh air through the first heat exchanger to achieve the heating effect. It is equivalent to using the cold storage and heat storage cycle system for emergency heating when the cooling and heating cycle system cannot perform heating.

[0070] Furthermore, the control method also includes:

[0071] The peak-valley electricity pricing strategy is set up as follows:

[0072] When it is determined that the current electricity price is at its lowest point, the first mode state is set to standby mode, and the second mode state is set to either cold storage or heat storage mode.

[0073] When it is determined that the current electricity price is at its peak and the first mode is in the start-up mode, the second mode is set to either the cooling or heating mode until the cold energy of the cold storage tank is completely released, at which point the second mode is set to either the cold storage + cooling mode or the heating + heating mode.

[0074] When it is determined that the current electricity price is at a low point or a high point, the start-up mode of cold storage / cooling + cooling under full cooling condition or the start-up mode of heat storage / heating + heating under full heating condition should be set first.

[0075] Setting up peak-valley electricity pricing strategies makes full use of peak and off-peak electricity periods, reduces the risk of peak electricity consumption, and further enhances the intelligence capabilities of air conditioners.

[0076] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0077] 1. This invention stores a portion of the cold energy used during daily use by setting up a cold and heat storage circulation system and cold and heat storage branches, or stores the cold energy of the environment when the ambient temperature reaches the required level and releases it when needed, which can save a lot of electricity. At the same time, the cold and heat storage circulation system is set up with a separate circulation, so that the cold energy stored in the cold and heat storage circulation system can be released through its circulation alone, further saving electricity.

[0078] 2. This invention sets up multiple modes, including energy storage (cold and heat storage), energy release (cold and heat release), and normal cooling and heating modes of the air conditioner. These modes are intelligently combined, and the system can automatically set the temperature according to the mode, realizing intelligent switching between cold storage / heat storage and cold / heat release, ensuring that the air conditioner can operate in the most optimal and energy-saving state.

[0079] 3. This invention separates the control of each branch and cycle, allowing each branch and cycle to be controlled independently through a dedicated module. This modular design enables easy switching between second-mode states. For each second-mode state, a corresponding cycle or branch responds and operates independently. Each mode state is independent of the others; for example, the cold storage and heat storage modes control the cold storage and heat storage branch, while the cold release and heat release modes control the cold storage and heat storage cycle system. These two parts are independent, allowing for simultaneous operation of cold storage and cold release, making the combination of modes more flexible. Furthermore, adding or deleting modes is very simple; when a new mode needs to be added, it is only necessary to coordinate the relationships between the various systems or branches.

[0080] 4. This invention, by setting a peak-valley electricity pricing strategy, enables air conditioners to automatically store energy during off-peak electricity prices. When electricity prices are at their peak and the air conditioner is on, the system automatically releases the pre-stored cooling capacity first, and only resumes cooling after the cooling capacity has been fully released. This efficiently utilizes off-peak electricity prices, effectively avoids peak electricity consumption, reduces potential electricity hazards, significantly reduces electricity consumption during peak hours, saves on electricity bills, and meets the requirements of "carbon neutrality". Attached Figure Description

[0081] Figure 1 This is a structural diagram of the overall system of the air conditioner of the present invention.

[0082] Figure 2 This is a system operation diagram of the standby cold storage mode of the air conditioner of the present invention.

[0083] Figure 3 This is a system operation diagram of the standby heat storage mode of the air conditioner of the present invention.

[0084] Figure 4 This is a system operation diagram of the air conditioner's start-up cooling mode, start-up heating mode, and fault emergency mode according to the present invention.

[0085] Figure 5 This is a system operation diagram of the start-up cold storage + cooling mode of the air conditioner of the present invention.

[0086] Figure 6 This is a system operation diagram of the start-up heat storage + heating mode of the air conditioner of the present invention.

[0087] Figure 7 This is a system operation diagram of the air conditioner of the present invention in the start-up cold storage / cold release + cooling mode.

[0088] Figure 8 This is a system operation diagram of the air conditioner of the present invention in the start-up heat storage / heat release + heating mode.

[0089] Figure 9 This is a schematic flowchart of the air conditioning control system of the present invention.

[0090] Figure labels: Control system 100, air supply fan 101, fresh air temperature sensor 102, air supply temperature sensor 103, refrigerant temperature sensor 104, cold storage tank 105, filter 106, circulating pump 107, adjustable heating tank 108, first heat exchanger 109, manual ball valve 110, liquid level vent valve 111, distributor 112, heat exchange coil 113, compressor 201, four-way valve 202, third heat exchanger 203, axial flow fan 204, first check valve 205, refrigerant receiver 206, dryer filter 207, sight glass 208, first electronic expansion valve 209, second solenoid valve 210, second heat exchanger 211, refrigerant regulating valve 212, gas-liquid separator 213, first solenoid valve 220, second check valve 301, second electronic expansion valve 302. Detailed Implementation

[0091] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the invention. To better illustrate the following embodiments, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions; it is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0092] Example 1

[0093] like Figure 1 As shown, this embodiment provides an integrated cold and heat storage multi-mode fresh air conditioner, which includes a cooling and heating cycle system, a cold and heat storage cycle system, a temperature acquisition module, and a control system 100.

[0094] The cooling and heating cycle system includes a cooling and heating branch, a cold storage and heat storage branch, and an air supply and heat exchange branch; the cold storage and heat storage branch and the cooling and heating branch are connected to form a cold storage and heat storage cycle loop, and the air supply and heat exchange branch and the cooling and heating branch are connected to form a cooling and heating cycle loop.

[0095] Specifically, the cooling and heating branch includes a first cooling and heating switching module, a second cooling and heating switching module, a cooling and heating exchange module, a first flow regulation module, and a second flow regulation module connected by pipelines; wherein the first cooling and heating switching module and the second cooling and heating switching module are respectively connected to both sides of the pipeline of the third heat exchanger 203. Specifically, the first cooling and heating switching module includes a four-way valve 202 and a compressor 201, and the second cooling and heating switching module includes a first one-way valve 205, a second one-way valve 201, a first solenoid valve 220, a second solenoid valve 210, and a refrigerant receiver 206. The connection state of the four-way valve 202 is determined by the air conditioner's operating mode to realize the switching between the cooling and heating circuits, and at the same time, the first one-way valve 205... 05 and a second one-way valve 301 restrict the flow of refrigerant. The first solenoid valve 220 and the second solenoid valve 210 control the opening and closing of the cold storage and heat storage branch and the air supply and heat exchange branch, respectively. The first flow regulation module includes a refrigerant regulating valve 212 in the pipeline, and the second flow regulation module includes a first electronic expansion valve 209 and a second electronic expansion valve 302 in the pipeline. The refrigerant regulating valve 212 is a three-way regulating valve, with one port connected to the cooling and heating branch and the other two ports connected to the cold storage and heat storage branch and the air supply and heat exchange branch, respectively. By regulating the refrigerant flow from the cooling and heating branch to the cold storage and heat storage branch and the air supply and heat exchange branch, the cooling and cold storage efficiency is regulated, thereby achieving the effect of controlling and saving electricity. An axial flow fan 204 is also provided on the third heat exchanger 203 to realize the heat exchange between the third heat exchanger 203 and the outside fresh air.

[0096] The cold and heat storage branch includes a heat exchange coil 113, and the cold and heat storage circulation system includes a cold and heat storage tank 105. The heat exchange coil 113 is installed in the cold and heat storage tank 105. The heat exchange coil 113 exchanges heat with the refrigerant in the cold and heat storage tank 105 to store cold or heat. Therefore, the cold and heat storage circulation system is used to release the stored cold or heat to achieve cooling or heating functions. In addition, the cold and heat storage circulation system also includes a circulation pump 107, an adjustable heating tank 108, and... The first heat exchanger 109; wherein the circulating pump 107 can be configured as a variable frequency circulating pump 107. When the cold storage and heat storage circulation system performs a cold release cycle or a heat release cycle, the circulating pump 107 delivers the refrigerant in the cold storage and heat storage tank 105 to the first heat exchanger 109 to exchange heat with the fresh air; the adjustable heating tank 108 heats the refrigerant in the cold storage and heat storage circulation system when the air conditioner cannot provide heating, so that the heated refrigerant can enter the first heat exchanger 109 to exchange heat with the fresh air and achieve emergency heating.

[0097] The air supply heat exchange branch includes a second heat exchanger 211 and an air supply fan 101. The air supply fan 101 is located near the second heat exchanger 211 and provides air supply power to the first heat exchanger 109 and the second heat exchanger 211.

[0098] The temperature acquisition module includes a fresh air temperature sensor 102, a supply air temperature sensor 103, and a refrigerant temperature sensor 104. The fresh air temperature sensor 102 is located at the fresh air inlet of the first heat exchanger 109 and the second heat exchanger 211 to detect the temperature of the fresh air passing through them in real time. Additionally, the fresh air temperature sensor 102 is also located at the fresh air inlet of the third heat exchanger 203 to monitor the temperature of the fresh air passing through it in real time. The fresh air temperature sensors 102 are located at different positions. 02. Data can be collected by installing the sensor at a single location or by installing it independently at different locations and then averaging the data. The air supply temperature sensor 103 is installed at the outlet of the air supply fan 101 to detect the air supply temperature after passing through the first heat exchanger 109 and the second heat exchanger 211 in real time. The refrigerant temperature sensor 104 is installed on the cold storage tank 105 to detect the temperature of the refrigerant in the cold storage tank 105 in real time. It is worth noting that the sensor detects the temperature of the refrigerant in the cooling and heating cycle loop, not the temperature of the refrigerant in the cold storage cycle loop.

[0099] The control system 100 connects to specific devices in the aforementioned module systems. For example, it connects to the temperature sensors in the temperature acquisition module, calculates and judges the acquired temperatures, and sets the air conditioner's operating mode and switches between modes. It also connects to the four-way valve 202, the first solenoid valve 220, and the second solenoid valve 210. By controlling the connection of the four-way valve 202, it controls the switching between the air conditioner's cooling and heating modes. By controlling the opening and closing of the first solenoid valve 220 and the second solenoid valve 210, it enables the connection and disconnection of the cold storage and heat storage branch and the air supply and heat exchange branch. Furthermore, it connects to the refrigerant regulating valve 212 to regulate the flow rate to the cold storage and heat storage branch and the air supply and heat exchange branch. It also connects to the operating frequency of the circulating pump 107 and the compressor 201 to regulate the flow rate of refrigerant and heat transfer fluid in the cooling and heating branches and the cold storage and heat storage circulation system, respectively. Simultaneously, it automatically adjusts the opening of the expansion valve, achieving refrigerant throttling and automatic refrigerant flow regulation, satisfying the system's cooling capacity while ensuring safe system operation.

[0100] In addition, the control system 100 is provided with a first mode state and a second mode state;

[0101] The first mode includes standby mode, power-on mode, and power-off mode; that is, it is equivalent to the main states of the air conditioner, corresponding to the standby, power-on, and power-off states of the air conditioner.

[0102] The second mode includes one or a combination of cold storage, cold storage / cold release, cold release or refrigeration modes and one or a combination of heat storage, heat storage / heat release, heat release or heating modes;

[0103] The control system 100 operates in a mode that is a combination of a first mode state and a second mode state.

[0104] When the second mode state of the control system 100 includes cold storage or heat storage, the refrigerant is controlled to pass through the cold storage or heat storage branch; when the second mode state of the control system 100 includes cold release or heat release, the cold storage or heat storage cycle system is controlled to perform a cold release cycle or a heat release cycle; when the second mode state of the control system 100 includes cooling or heating, the refrigerant is controlled to pass through the air supply heat exchange branch. By combining the first and second mode states, the air conditioner's mode state is obtained. For example, when the first mode state is "on" and the second mode state is a combination of cold storage and heating, the air conditioner's mode state is "on, cold storage, and heating." Through the combination of second mode states, intelligent combinations of cold storage / releasing and cooling or heat storage / releasing and heating modes are achieved. Different second mode states control the operation of corresponding loops and the execution of corresponding functions, realizing intelligent and diversified control of the air conditioner. Simultaneously, this setup modularizes the air conditioner's control, facilitating easy switching between second mode states. For each second mode state, a corresponding loop or branch responds and operates independently. Each mode state is independent of the others; for example, the cold storage and heat storage modes correspond to the control of the cold storage and heat storage branch, while the releasing and releasing modes correspond to the control of the cold storage and heat storage loop system. These two parts are independent, allowing simultaneous operation of cold storage and releasing, making the combination of modes more flexible. Furthermore, the specific implementation of adding or deleting modes is very simple. When a new mode needs to be added, it is only necessary to coordinate the relationships between the various systems or branches.

[0105] In a specific embodiment, one side of the third heat exchanger 203 is connected to the A2 end of the four-way valve 202, the A1 end of the four-way valve 202 is connected to one end of the compressor 201, the other end of the compressor 201 is connected to the B1 end of the refrigerant regulating valve 212 and the A3 end of the four-way valve 202, and the A4 end of the four-way valve 202 is connected to the B1 end of the refrigerant regulating valve 212; in addition, a gas-liquid separator 213 is also provided between the compressor 201 and the A3 end of the four-way valve 202 to separate the gaseous refrigerant and the liquid refrigerant as much as possible, realize the output of gaseous refrigerant, and thus ensure the safe operation of the compressor 201;

[0106] The other side of the third heat exchanger 203 is connected to one side of the second electronic expansion valve 302 and the inlet end of the first one-way valve 205. The outlet end of the first one-way valve 205 is connected to the inlet of the refrigerant receiver 206. The other side of the second electronic expansion valve 302 is connected to one side of the first electronic expansion valve 209 and the outlet of the refrigerant receiver 206. The other side of the first electronic expansion valve 209 is connected to the inlet end of the second one-way valve 301, one end of the first solenoid valve 220, and one end of the second solenoid valve 210, respectively. The outlet end of the second one-way valve 301 is connected to the inlet of the refrigerant receiver 206. In addition, a dryer filter 207 and a sight glass 208 are also provided between the outlet of the refrigerant receiver 206 and the first electronic expansion valve 209. The dryer filter 207 filters impurities in the system and absorbs residual moisture in the system to avoid system component failure, ice blockage, or unstable operation. The sight glass 208 is mainly used to observe the working status and moisture content of the refrigerant in the system pipeline, providing a basis for judging the long-term reliable operation of the system.

[0107] One end of the heat exchange coil 113 is connected to the B3 end of the refrigerant regulating valve 212, and the other end of the heat exchange coil 113 is connected to the other end of the first solenoid valve 220; one end of the second heat exchanger 211 is connected to the B2 end of the refrigerant regulating valve 212, and the other end of the second heat exchanger 211 is connected to the other end of the second solenoid valve 210.

[0108] In the cold storage and heat storage circulation system, one end of the first heat exchanger 109 is connected to the refrigerant inlet of the cold storage tank 105 via a pipeline, and is also connected to a distributor 112 located inside the cold storage tank 105 via a pipeline. The distributor 112 is located at the top of the cold storage tank 105 and distributes the refrigerant after heat exchange in the first heat exchanger 109 evenly to the refrigerant liquid surface at the top of the heat exchange coil 113 through spraying or other methods. The distributor can be made of metal, plastic, etc., but must meet the compatibility requirements with the refrigerant. In this way, the refrigerant can evenly exchange heat with the heat exchange coil 113. The outlet of the cold storage tank 105, the circulation pump 107, the adjustable heating tank 108, and the other end of the first heat exchanger 109 are connected in sequence via pipelines. In addition, a filter 106 is also installed between the outlet of the cold storage tank 105 and the circulation pump 107. The cold storage tank 105 also includes a manual ball valve 110, which is used to drain the refrigerant solution in the cold storage tank 105.

[0109] Specifically, when the refrigeration and heating cycle system is in cooling operation, the A1 end of the four-way valve 202 is connected to the A2 end, and the A4 end is connected to the A3 end. The refrigerant flow direction in the refrigeration and heating cycle system is shown by the black arrow. When the refrigeration and heating cycle system is in heating operation, the A1 end of the four-way valve 202 is connected to the A4 end, and the A2 end is connected to the A3 end. At this time, the refrigerant flow direction is shown by the white arrow.

[0110] Example 2

[0111] This embodiment provides a control method for an integrated cold and heat storage multi-mode fresh air conditioner. The control method in this embodiment is based on the air conditioner provided in Embodiment 1, and the specific control method includes:

[0112] S1: Set the mode determination temperature in the control system; in this step, setting the mode determination temperature specifically involves setting the cold state setpoint T. 1h Thermal state setpoint T 1d Cold storage state setpoint T 3d Thermal storage state setpoint T 3h 1. Cold storage hysteresis setpoint Δt 3d and thermal storage hysteresis setpoint Δt 3h Cold storage state setpoint T 3d Below the cold state setting value T 1h Thermal storage state setpoint T 3h Higher than the thermal state setpoint T 1d Thermal storage state setpoint T 3h Higher than the cold storage state set value T 3d Cold state setpoint T 1h Higher than the thermal state setpoint T 1d .

[0113] S2: Receive user input instructions; these instructions include the power-on, standby, and power-off states corresponding to the first mode state, as well as the specific mode of the corresponding second mode state, such as full cold state or full hot state.

[0114] S3: Set the first mode state according to the user's input command;

[0115] S4: Set the second mode state based on the user input command, the temperature information collected by the temperature acquisition module, the mode determination temperature, and the first mode state.

[0116] Specifically, the first mode state of the control system 100 is set according to the user's input command, namely, power-on mode, standby mode or power-off mode; which is equivalent to setting the air conditioner to power on, standby and power off respectively.

[0117] The control system 100 collects temperature information from the air conditioner through a temperature acquisition module. Specifically, the air conditioner's temperature information includes the inlet air temperature T1 and the refrigerant temperature T3 of the cold storage and heat storage tank 105. Based on the collected temperature information, mode determination temperature, and first mode state, the control system 100 combines user commands to set the second mode state and the specific operating mode of the air conditioner. Corresponding to Embodiment 1, when the second mode state of the control system 100 includes "cold storage" or "heat storage," the refrigerant is controlled to pass through the cold storage and heat storage branch. When the second mode state of the control system 100 includes "cooling" or "heating," the cold storage and heat storage circulation system is controlled to execute a cooling cycle or a heating cycle. When the second mode state of the control system 100 includes "cooling" or "heating," the refrigerant is controlled to pass through the air supply heat exchange branch. The specific steps are as follows:

[0118] S401: The temperature acquisition module acquires the air inlet temperature T1 of the air conditioner and the refrigerant temperature T3 of the cold storage tank.

[0119] S402: Determine the first mode state input by the user. If the first mode state is standby state, execute step S403; if the first mode state is power-on state, execute step S407.

[0120] S403: Determine T1 and T 1h The size, when T1>T 1h When T1 ≤ T, execute step S404; 1h When the time comes, proceed to step S405;

[0121] S404: Determine if T3 and T 3d The size, when T3≤T 3d When T3 > T, execute step S4A; 3d At that time, execute step S4B;

[0122] S405: Determine T1 and T2 1d The size when T1 <T 1d When T1≥T, proceed to step S406; 1d When the time comes, execute step S3A;

[0123] S406: Determine T3 and T3 h The size, when T3≥T 3h When T3 is reached, step S3C is executed; when T3 is reached... <T 3h When the time comes, execute step S3A;

[0124] S407: Determine T1 and T 1h The size, when T1>T 1h When T1 ≤ T, proceed to step S408; 1h When the time comes, proceed to step S410;

[0125] S408: Determine whether the user input request is in a completely cold state. If yes, proceed to step S3H; otherwise, proceed to step S409.

[0126] S409: Determine T3 and T 3d The size, when T3≤T 3d When T3 > T, execute step S3D; 3d At that time, execute step S3E;

[0127] S410: Determine T1 and T 1d The size when T1 <T 1d When T1≥T, execute step S3J; 1d When the time comes, proceed to step S411;

[0128] S411: Determine if the cooling / heating branch is faulty. If it is faulty, proceed to step S3K; if it is not faulty, proceed to step S412.

[0129] S412: Determine whether the user input request is in a fully hot state. If yes, proceed to step S3I; otherwise, proceed to step S413.

[0130] S413: Determine if T3 and T 3h The size, when T3≥T 3h When T3 is reached, step S3F is executed; when T3 is reached... <T 3h At that time, execute step S3G;

[0131] S4A: The system is set to power off in the first mode.

[0132] S4B: The system is set to the second mode, cold storage, until it is determined that T3≤T 3d When the time comes, execute step S3A;

[0133] S4C: The system is set to the second mode, thermal storage, until T3 is determined. <T 3h When the time comes, execute step S3A;

[0134] S4D: The system is set to the second mode of cooling until it determines whether T3 > T. 3d +Δt 3d At that time, execute step S3E;

[0135] S4E: The system is set to the second mode state as cold storage + cooling, until it is determined that T3≤T 3d When the time comes, execute step S3D;

[0136] S4F: The system is set to the second mode state as heat dissipation until T3 is determined. <T 3h -Δt 3h At that time, execute step S3G;

[0137] S4G: The system is set to the second mode state as thermal storage + heating, until it is determined that T3 ≥ T. 3h When the time comes, proceed to step S3F;

[0138] S4H: The system is set to the second mode state as cold storage / cold release + cooling;

[0139] S4I: The system is set to the second mode status as heat storage / heat release + heating;

[0140] S4J: The system is set to ventilation mode as the second mode.

[0141] S4K: The system is set to emergency fault mode.

[0142] That is, the above steps determine the entry into the corresponding mode, and the modes can be switched to a certain extent;

[0143] The specific behavior of each mode is as follows: if no explanation is given regarding whether the user sets a full cooling or full heating state, it is assumed that the user has not entered that state; if no explanation is given regarding whether the cooling or heating branch is faulty, it is assumed that the cooling or heating branch is normal.

[0144] Manually set the first mode to standby mode when T1>T 1h And T3>T 3d When the system is set to the second mode as cold storage mode, the control system 100 is in standby cold storage mode. In this mode, the refrigeration and heating cycle system performs cold storage work, and the cold storage and heat storage cycle system stops operating until T3≤T 3d The system is set to power-off mode as the first mode; the specific behavior is as follows: Figure 2As shown, equipment not shown in the figure is stopped. The A1 and A2 terminals of the four-way valve 202 are connected, and the A4 and A3 terminals are connected. The B3 terminal of the refrigerant regulating valve 212 is connected to the B1 terminal, and the B2 terminal is closed. The first solenoid valve 220 is open, and the manual ball valve 110 and the liquid level vent valve 111 are both closed. The control system 100 intelligently adjusts the compressor 201 to drive the corresponding flow rate of high-temperature, high-pressure gaseous refrigerant through the A1 and A2 terminals of the four-way valve 202 and into the third heat exchanger 203 based on the temperature data detected by the refrigerant temperature sensor 104. The intelligent output signal is sent to the axial flow fan 204, and the fan speed is adjusted to realize the heat exchange and heat exchange capacity regulation between the refrigerant and the outside fresh air in the third heat exchanger 203. This causes the high-temperature and high-pressure gaseous refrigerant to be converted into a medium-temperature and high-pressure liquid refrigerant, which then passes through the first one-way valve 205, the refrigerant storage tank, the dryer filter 207, the sight glass 208, and the first electronic expansion valve 209 in sequence. The control system 100 automatically adjusts the opening of the first electronic expansion valve 209 by relying on the built-in integrated intelligent energy-saving control method. While ensuring the safe and stable operation of the system, the low-temperature and low-pressure gas-liquid mixed refrigerant is output to enter the heat exchange coil 113 through the first solenoid valve 220 for heat exchange. After absorbing heat from the refrigerant in the heat exchange coil 113, the refrigerant in the cold storage tank 105 transforms into a medium-temperature, low-pressure gaseous refrigerant. It then passes sequentially through terminals B3 and B1 of the refrigerant regulating valve 212, terminals A4 and A3 of the four-way valve 202, and the gas-liquid separator 213 before entering the compressor 201, completing the refrigerant cycle. Meanwhile, the refrigerant in the cold storage tank 105 continuously exchanges heat with the refrigerant in the heat exchange coil 113, causing its temperature to drop until the refrigerant temperature sensor 104 detects a value T3 that is no greater than the cold storage state setpoint T. 3d When the air conditioning unit enters the shutdown state, the control system 100 adjusts all components of the unit to be in a closed or non-circulating state.

[0145] Manually set the first mode to standby mode, when T1 <T 1d And T3 <T 1h When the system is set to the second mode as the thermal storage mode, the control system 100 is in standby thermal storage mode. In this mode, the cooling and heating cycle system performs thermal storage work, and the cold storage and thermal storage cycle system stops operating until T3 ≥ T. 1d The system is set to power off mode as the first mode; for details, see below. Figure 3As shown, equipment not shown in the figure is stopped. The A1 and A4 terminals of the four-way valve 202 are connected, and the A2 and A3 terminals are connected. The B1 and B3 terminals of the refrigerant regulating valve 212 are connected, and the B2 terminal is closed. The first solenoid valve 220 is open, and the manual ball valve 110 and the liquid level vent valve 111 are both closed. The control system 100 intelligently adjusts the compressor 201 based on the temperature data detected by the refrigerant temperature sensor 104. The high-temperature, high-pressure gaseous refrigerant drives the compressor 201 to drive the refrigerant through the A1 and A4 terminals of the four-way valve 202 and the B1 and B3 terminals of the refrigerant regulating valve 212, then enters the heat exchange coil 113. After indirect heat exchange with the refrigerant in the cold storage tank 105, it is converted into a medium-temperature, high-pressure liquid refrigerant, which then passes sequentially through the first solenoid valve 220 and the second check valve. 301, refrigerant storage tank, dryer filter 207, sight glass 208, and second electronic expansion valve 302; the control system 100 automatically adjusts the operating opening of the second electronic expansion valve 302 based on the built-in integrated intelligent energy-saving control method. While ensuring the safe and stable operation of the system, it outputs low-temperature and low-pressure gas-liquid mixed refrigerant into the third heat exchanger 203. The control system 100 intelligently outputs signals to the axial flow fan 204 according to the pressure and temperature of the refrigerant inside the third heat exchanger 203. By adjusting the fan speed, the heat exchange and heat exchange capacity between the refrigerant inside the third heat exchanger 203 and the outside fresh air are realized, so that the low-temperature and low-pressure gas-liquid mixed refrigerant is transformed into a medium-temperature and low-pressure gaseous refrigerant. Then, it passes through the A2 and A3 ends of the four-way valve 202 and the gas-liquid separator 213 in sequence before entering the compressor 201 to complete the refrigerant cycle. The refrigerant in the cold storage tank 105 continuously and indirectly absorbs heat from the high-temperature, high-pressure refrigerant in the heat exchange coil 113, causing its temperature to rise until the refrigerant temperature sensor 104 detects a value T3 that is not less than the heat storage state set value T. 3h When the air conditioning unit enters the shutdown state, the control system 100 adjusts all components of the unit to be in a closed or non-circulating state.

[0146] Manually set the first mode to power-on mode, when T1>T 1h And T3≤T 3d When the system is set to the second mode as the cooling release mode, the control system 100 is in the start-up cooling release mode. In this mode, the refrigeration and heating cycle system stops operating, and the cold storage and heat storage cycle system performs the cooling release cycle; until T3>T 3d +Δt 3d If the second mode is set to cold storage + cooling mode, then the control system 100 will operate in cold storage + cooling mode upon startup; specifically as follows... Figure 4As shown, equipment not shown in the figure is stopped, manual ball valve 110 and liquid level vent valve 111 are closed, and adjustable heating tank 108 is in a de-energized but conductive state. The control system 100 automatically adjusts the adjustable speed blower 101 according to customer needs and the built-in integrated intelligent energy-saving control method, so that the air volume and pressure meet the usage requirements. The control system 100 automatically adjusts the operating frequency of the circulating pump 107 based on the temperature data detected by the air supply temperature sensor 103 and the built-in integrated intelligent energy-saving control method. This drives the low-temperature refrigerant in the cold storage tank 105 to pass through the filter 106, the circulating pump 107, and the adjustable heating tank 108 in sequence before entering the first heat exchanger 109 to exchange heat with the fresh air. After the fresh air undergoes indirect heat exchange with the refrigerant in the first heat exchanger 109, its temperature drops to the required state and it is delivered to the customer's location by the adjustable speed air supply fan 101 (101). Meanwhile, the refrigerant that has undergone heat exchange in the first heat exchanger 109 rises in temperature and flows out, returning to the cold storage tank 105 through the distributor 112, completing the refrigerant cooling cycle. This cycle continues until the refrigerant temperature sensor 104 detects a value T3 greater than the cold storage state set value T. 3d With the cold storage hysteresis setpoint Δt 3d When the sum of these conditions is reached, the air conditioning unit enters the cold storage and cooling state.

[0147] Manually set the first mode to power-on mode, when T1 <T 1d T3≥T 3h If the system is set to the second mode as the heat release mode, then the control system 100 is in the start-up heat release mode. In this mode, the cooling and heating cycle system stops operating, and the cold storage and heat storage cycle system performs the heat release cycle; until T3 <T 3h -Δt 3h If the second mode is set to thermal storage + heating mode, then the control system 100 will operate in the start-up thermal storage + heating mode; specifically as follows... Figure 4As shown, equipment not shown in the figure is stopped, manual ball valve 110 and liquid level vent valve 111 are closed, and adjustable heating tank 108 is in a de-energized but conductive state. The control system 100 automatically adjusts the adjustable speed blower 101 according to customer needs and the built-in integrated intelligent energy-saving control method, so that the air volume and pressure meet the usage requirements. The control system 100 automatically adjusts the operating frequency of the circulating pump 107 based on the temperature data detected by the air supply temperature sensor 103 and the built-in integrated intelligent energy-saving control method. This drives the high-temperature refrigerant in the cold storage tank 105 to pass through the filter 106, the circulating pump 107, and the adjustable heating tank 108 in sequence before entering the first heat exchanger 109 to exchange heat with the fresh air. After the fresh air exchanges heat with the high-temperature refrigerant in the first heat exchanger 109, its temperature rises to the required state and is delivered to the customer's location by the adjustable speed air supply fan 101. Meanwhile, the refrigerant that has undergone heat exchange in the first heat exchanger 109 cools down and flows out, returning to the cold storage tank 105 (105) through the distributor 112, completing the refrigerant heat release cycle. This cycle continues until the refrigerant temperature sensor 104 detects a value T3 that is less than the set value T for the heat storage state. 3h With respect to the thermal storage hysteresis setpoint Δt 3h When the temperature difference is reached, the air conditioning unit enters the start-up heat storage + heating state.

[0148] Manually set the first mode to power-on mode, when T1>T 1h And T3>T 3d When the system is set to the second mode as cold storage + cooling mode, the control system 100 is in the start-up cold storage + cooling mode. In this mode, the cooling and heating cycle system performs cooling operation, and the cold storage and heat storage cycle system stops operating; until T3≤T 3d When the second mode is set to cooling mode, the control system 100 will be in cooling mode upon startup; specifically as follows: Figure 5As shown, equipment not shown in the figure is stopped. The A1 and A2 terminals of the four-way valve 202 are connected, and the A4 and A3 terminals are connected. The B3 and B1 terminals of the refrigerant regulating valve 212 are connected, and the B2 and B1 terminals are connected. The first solenoid valve 220 and the second solenoid valve 210 are in the open state. The manual ball valve 110 and the liquid level vent valve 111 are both in the closed state. The control system 100 automatically adjusts the adjustable speed blower 101 according to customer needs and the built-in integrated intelligent energy-saving control method, ensuring that the air volume and pressure meet the usage requirements. The control system 100 intelligently adjusts the compressor 201 to drive the high-temperature and high-pressure gaseous refrigerant through the A1 and A2 ends of the four-way valve 202 and into the third heat exchanger 203 based on the temperature data detected by the supply air temperature sensor 103 and the refrigerant temperature sensor 104 and the built-in integrated intelligent energy-saving control method. The control system 100 intelligently outputs a signal to the adjustable speed axial flow fan 204 based on the pressure of the refrigerant inside the third heat exchanger 203. By adjusting the fan speed, the heat exchange and heat exchange capacity between the refrigerant inside the third heat exchanger 203 and the outside fresh air are realized, so that the high-temperature and high-pressure gaseous refrigerant is converted into a medium-temperature and high-pressure liquid refrigerant, which then passes through the first one-way valve 205, the refrigerant storage tank, the dryer filter 207, the sight glass 208 and the first electronic expansion valve 209 in sequence. The control system 100 automatically adjusts the operating opening of the first electronic expansion valve 209 and the refrigerant flow distribution from B3 to B1 and from B2 to B1 of the refrigerant regulating valve 212 by relying on the built-in integrated intelligent energy-saving control method. While ensuring the safe and stable operation of the system, it outputs low-temperature and low-pressure gas-liquid mixed refrigerant. According to the distribution ratio, a portion of the refrigerant enters the second heat exchanger 211 through the second solenoid valve 210 to exchange heat with the fresh air. After the fresh air undergoes indirect heat exchange with the refrigerant in the second heat exchanger 211, its temperature drops to the required state and is delivered to the customer's required location by the adjustable speed blower 101 (101). A portion of the refrigerant enters the heat exchange coil 113 for heat exchange. The refrigerant in the heat exchange coil 113 absorbs heat from the refrigerant in the cold storage tank 105, transforming into a medium-temperature, low-pressure gaseous refrigerant. This gaseous refrigerant then merges with the medium-temperature, low-pressure gaseous refrigerant flowing out of the second heat exchanger 211 at the refrigerant regulating valve 212B1, and then passes through the A4 and A3 ends of the four-way valve 202 and the gas-liquid separator 213 before entering the compressor 201, completing the refrigerant cycle. Meanwhile, the refrigerant in the cold storage tank 105 continuously exchanges heat with the refrigerant in the heat exchange coil 113, causing its temperature to drop until the refrigerant temperature sensor 104 detects a value T3 that is not greater than the cold storage state set value T. 3d The air conditioning unit enters the cooling operation mode.

[0149] Manually set the first mode to power-on mode, when T1 <T 1d T3 <T 3hIf the system is set to the second mode as thermal storage + heating mode, then the control system 100 is in the start-up thermal storage + heating mode. In this mode, the cooling and heating cycle system operates in heating mode, and the cold storage and thermal storage cycle system stops operating; until T3 ≥ T 3h When the second mode is set to heat release mode, the control system 100 will be in power-on heat release mode; specifically as follows: Figure 6As shown, equipment not shown in the figure is stopped. The A1 and A4 terminals of the four-way valve 202 are connected, as are the A2 and A3 terminals. The B1 and B3 terminals of the refrigerant regulating valve 212 are connected, as are the B1 and B2 terminals. The first solenoid valve 220 and the second solenoid valve 210 are open. The manual ball valve 110 and the liquid level vent valve 111 are both closed. The control system 100 automatically adjusts the adjustable speed blower 101 according to customer needs and its built-in integrated intelligent energy-saving control method, ensuring that the air volume and pressure meet usage requirements. The control system 100 intelligently adjusts the compressor 201 to drive the high-temperature and high-pressure gaseous refrigerant of the corresponding flow rate through the A1 and A4 ends of the four-way valve 202 based on the temperature data detected by the supply air temperature sensor 103 and the refrigerant temperature sensor 104 and the built-in integrated intelligent energy-saving control method. It also adjusts the refrigerant flow distribution from the B1 end to the B2 end and from the B1 end to the B3 end of the refrigerant regulating valve 212. According to the distribution ratio, a portion of the refrigerant enters the second heat exchanger 211 through the B1 end to the B2 end of the refrigerant regulating valve 212 to exchange heat with the fresh air. After the fresh air undergoes indirect heat exchange with the refrigerant in the second heat exchanger 211, its temperature rises to the required state and is delivered to the customer's required location by the adjustable speed supply fan 101. Another portion of the refrigerant enters the heat exchange coil 113 through the B1 to B3 ends of the refrigerant regulating valve 212 for heat exchange. After indirect heat exchange with the refrigerant in the cold storage tank 105, it is converted into a medium-temperature, high-pressure liquid refrigerant. Then, after passing through the first solenoid valve 220, it merges with the medium-temperature, high-pressure liquid refrigerant that has completed indirect heat exchange with fresh air and flows out of the second heat exchanger 211 and the second solenoid valve 210. Then, it passes through the second one-way valve 301, the refrigerant storage tank, the dryer filter 207, the sight glass 208, and the second electronic expansion valve 302 in sequence. The control system 100 automatically adjusts the opening of the second electronic expansion valve 302 based on its built-in integrated intelligent energy-saving control method. While ensuring the safe and stable operation of the system, it outputs a low-temperature, low-pressure gas-liquid mixture of refrigerant into the third heat exchanger 203. The control system 100 intelligently outputs signals to the adjustable-speed axial flow fan 204 based on the pressure and temperature of the refrigerant inside the third heat exchanger 203. By adjusting the fan speed, the heat exchange and heat transfer between the refrigerant and the outside fresh air in the third heat exchanger 203 are achieved, transforming the low-temperature, low-pressure gas-liquid mixture of refrigerant into a medium-temperature, low-pressure gaseous refrigerant. This gaseous refrigerant then passes through the A2 and A3 terminals of the four-way valve 202 and the gas-liquid separator 213 before entering the compressor 201, completing the refrigerant heating cycle. Meanwhile, the refrigerant in the cold storage tank 105 continuously absorbs heat from the high-temperature, high-pressure refrigerant in the heat exchange coil 113, causing its temperature to rise until the refrigerant temperature sensor 104 detects a value T3 that is not less than the set value T for the heat storage state. 3h The air conditioning unit enters the start-up and heat dissipation state.

[0150] Manually set the first mode to power-on mode, when T1>T 1hFurthermore, when the user inputs a fully cold state, the control system 100 switches to a start-up cold storage / cold release + cooling mode. In this mode, the cooling and heating cycle system performs both cooling and cold storage operations, while the cold storage and heat storage cycle system performs a cold release cycle. Specifically, as follows... Figure 7As shown, equipment not shown in the figure is stopped. The A1 and A2 terminals of the four-way valve 202 are connected, and the A4 and A3 terminals are connected. The B3 and B1 terminals of the refrigerant regulating valve 212 are connected, and the B2 and B1 terminals are connected. The first solenoid valve 220 and the second solenoid valve 210 are open. The manual ball valve 110 and the liquid level vent valve 111 are both closed. The adjustable heating tank 108 is in a de-energized but conductive state. The control system 100 automatically adjusts the adjustable speed blower 101 according to customer needs and the built-in integrated intelligent energy-saving control method, ensuring that the air volume and pressure meet the usage requirements. The control system 100 intelligently adjusts the compressor 201 to drive the high-temperature and high-pressure gaseous refrigerant through the A1 and A2 ends of the four-way valve 202 and into the third heat exchanger 203 based on the temperature data detected by the supply air temperature sensor 103 and the refrigerant temperature sensor 104 and the built-in integrated intelligent energy-saving control method. The control system 100 intelligently outputs a signal to the adjustable speed axial flow fan 204 based on the pressure of the refrigerant inside the third heat exchanger 203. By adjusting the fan speed, the heat exchange and heat exchange capacity between the refrigerant inside the third heat exchanger 203 and the outside fresh air are realized, so that the high-temperature and high-pressure gaseous refrigerant is converted into a medium-temperature and high-pressure liquid refrigerant, which then passes through the first one-way valve 205, the refrigerant storage tank, the dryer filter 207, the sight glass 208 and the first electronic expansion valve 209 in sequence. The control system 100 automatically adjusts the operating opening of the first electronic expansion valve 209 and the refrigerant flow distribution from B3 to B1 and from B2 to B1 of the refrigerant regulating valve 212 by relying on the built-in integrated intelligent energy-saving control method. While ensuring the safe and stable operation of the system, it outputs low-temperature and low-pressure gas-liquid mixed refrigerant. According to the distribution ratio, a portion of the refrigerant enters the second heat exchanger 211 through the second solenoid valve 210 to exchange heat with the fresh air. After the fresh air indirectly exchanges heat with the refrigerant in the second heat exchanger 211, it completes the first step of cooling. Another portion of the refrigerant enters the heat exchange coil 113 for heat exchange. After absorbing the heat from the refrigerant in the cold storage tank 105, the refrigerant in the heat exchange coil 113 is converted into a medium-temperature, low-pressure gaseous refrigerant. It then merges with the medium-temperature, low-pressure gaseous refrigerant flowing out of the second heat exchanger 211 at the refrigerant regulating valve 212B1 end, and then enters the compressor 201 through the A4 and A3 ends of the four-way valve 202 and the gas-liquid separator 213 to complete the refrigerant refrigeration cycle.Simultaneously, the control system 100 automatically adjusts the operating frequency of the circulating pump 107 based on the temperature data detected by the air supply temperature sensor 103 and the built-in integrated intelligent energy-saving control method. This drives the low-temperature refrigerant in the cold storage tank 105, after cooling, to pass sequentially through the filter 106, the circulating pump 107, and the adjustable heating tank 108 before entering the first heat exchanger 109 to exchange heat with the fresh air that has completed the first step of cooling. After completing the first step of cooling, the fresh air undergoes indirect heat exchange with the refrigerant in the first heat exchanger 109, and its temperature drops to the required state. It is then delivered to the customer's location by the adjustable speed air supply fan 101. Meanwhile, the refrigerant in the first heat exchanger 109, having completed indirect heat exchange, flows out and returns to the cold storage tank 105 through the distributor 112, continuing to exchange heat indirectly with the refrigerant in the heat exchange coil 113 to achieve cooling, thereby completing the cold storage / cooling cycle of the refrigerant.

[0151] Manually set the first mode to power-on mode, when T1 <T 1d Furthermore, when the user inputs a fully heated state, the control system 100 operates in a start-up heat storage / heat release + heating mode. In this mode, the cooling and heating cycle system performs both heating and heat storage operations, while the cold storage and heat storage cycle system performs a heat release cycle; specifically as follows... Figure 8As shown, equipment not shown in the figure is stopped. The A1 and A4 terminals of the four-way valve 202 are connected, as are the A2 and A3 terminals. The B1 and B3 terminals of the refrigerant regulating valve 212 are connected, as are the B1 and B2 terminals. The first solenoid valve 220 and the second solenoid valve 210 are open. The manual ball valve 110 and the liquid level vent valve 111 are both closed. The adjustable heating tank 108 is in a de-energized but conductive state. The control system 100 automatically adjusts the adjustable speed blower 101 according to customer needs and its built-in integrated intelligent energy-saving control method, ensuring that the air volume and pressure meet usage requirements. The control system 100 intelligently adjusts the compressor 201 to drive the high-temperature and high-pressure gaseous refrigerant of the corresponding flow rate through the A1 and A4 ends of the four-way valve 202 according to the temperature data detected by the air supply temperature sensor 103 and the refrigerant temperature sensor 104 and the built-in integrated intelligent energy-saving control method. It also adjusts the refrigerant flow distribution from the B1 end to the B2 end and from the B1 end to the B3 end of the refrigerant regulating valve 212. According to the distribution ratio, a portion of the refrigerant enters the second heat exchanger 211 through the B1 end to the B2 end of the refrigerant regulating valve 212 to exchange heat with the fresh air. After the fresh air indirectly exchanges heat with the refrigerant in the second heat exchanger 211, it completes the first step of heating. Another portion of the refrigerant enters the heat exchange coil 113 through the B1 to B3 ends of the refrigerant regulating valve 212 for heat exchange. After indirect heat exchange with the refrigerant in the cold storage tank 105, it is converted into a medium-temperature, high-pressure liquid refrigerant. Then, after passing through the first solenoid valve 220, it merges with the medium-temperature, high-pressure liquid refrigerant that has completed indirect heat exchange with fresh air and flows out of the second heat exchanger 211 and the second solenoid valve 210. Then, it passes through the second one-way valve 301, the refrigerant storage tank, the dryer filter 207, the sight glass 208, and the second electronic expansion valve 302 in sequence. The control system 100 automatically adjusts the opening of the second electronic expansion valve 302 based on the built-in integrated intelligent energy-saving control method. While ensuring the safe and stable operation of the system, it outputs low-temperature and low-pressure gas-liquid mixed refrigerant into the third heat exchanger 203. The control system 100 intelligently outputs signals to the adjustable speed axial flow fan 204 according to the pressure and temperature of the refrigerant inside the third heat exchanger 203. By adjusting the fan speed, the heat exchange and heat exchange capacity between the refrigerant inside the third heat exchanger 203 and the outside fresh air are realized, so that the low-temperature and low-pressure gas-liquid mixed refrigerant is transformed into a medium-temperature and low-pressure gaseous refrigerant. Then, it passes through the A2 and A3 ends of the four-way valve 202 and the gas-liquid separator 213 in sequence before entering the compressor 201 to complete the refrigerant heating cycle.Simultaneously, the control system 100 automatically adjusts the operating frequency of the circulating pump 107 based on the temperature data detected by the air supply temperature sensor 103 and the built-in integrated intelligent energy-saving control method. This drives the high-temperature refrigerant in the cold storage tank 105, which has undergone indirect heat absorption and temperature rise, to pass sequentially through the filter 106, the circulating pump 107, and the adjustable heating tank 108 before entering the first heat exchanger 109 to exchange heat with the fresh air that has completed the first step of temperature rise. After the fresh air that has completed the first step of temperature rise undergoes indirect heat exchange with the high-temperature refrigerant in the first heat exchanger 109, its temperature rises to the required state and it is delivered to the customer's required location by the adjustable speed air supply fan 101. Meanwhile, the refrigerant in the first heat exchanger 109, having completed indirect heat exchange, flows out and returns to the cold storage tank 105 through the distributor 112, where it continues to exchange heat indirectly with the high-temperature and high-pressure refrigerant in the heat exchange coil 113 to achieve temperature rise, thereby completing the heat storage / heat release cycle of the refrigerant.

[0152] Manually set the first mode to power-on mode, when T1>T 1h T3≤T 3d When the second mode is manually set to cooling + refrigeration mode, the control system 100 is in the start-up cooling + refrigeration mode. In this mode, the refrigeration and heating cycle system performs refrigeration work, and the cold storage and heat storage cycle system performs cooling cycle; until T3>T 3d +Δt 3d If the second mode is set to cold storage + cooling mode, then the mode of the control system 100 is cold storage + cooling mode when it is turned on. This mode is similar to the cold storage / cooling release + cooling mode when it is turned on, but the cold storage and cooling cycle is not performed.

[0153] Manually set the first mode to power-on mode, when T1 <T 1d T3≥T 3h When the second mode is manually set to heat release + heating mode, the control system 100 is in the start-up heat release + heating mode. In this mode, the cooling and heating cycle system performs heating operation, and the cold storage and heat storage cycle system performs heat release cycle; until T3 <T 3h -Δt 3h If the second mode is set to the heat storage + heating mode, then the mode of the control system 100 is the start-up heat storage + heating mode; this mode is similar to the start-up heat storage / heat release + heating mode, but does not perform the cycle of heat storage and heat release.

[0154] In addition to the modes mentioned above, there are also ventilation mode and emergency failure mode;

[0155] In the ventilation mode, the cold storage and heat storage circulation system and the cooling and heating circulation system stop operating, and only the air supply fan 101 is turned on. The control system 100 automatically adjusts the air supply fan 101 according to customer needs and the built-in integrated intelligent energy-saving control method so that the air volume, temperature and pressure meet the usage requirements.

[0156] The fault emergency mode is as follows: when T1 <T 1d Furthermore, the refrigeration and heating cycle system cannot perform heating operations normally. The second mode is set to emergency fault mode. In this mode, the adjustable heating tank 108 is controlled to heat the refrigerant in the cold storage and heat storage cycle system, specifically as follows: Figure 4 As shown, equipment not shown in the figure is stopped, manual ball valve 110 and liquid level vent valve 111 are closed, and adjustable heating tank 108 is energized and conductive. The control system 100 automatically adjusts the high-speed air supply fan 101 according to customer needs and the built-in integrated intelligent energy-saving control method, ensuring that the air volume and pressure meet usage requirements. The control system automatically adjusts the operating frequency of the variable frequency circulating pump 107 based on the temperature data detected by the air supply temperature sensor 103 and the built-in integrated intelligent energy-saving control method, driving the refrigerant in the cold storage tank 105 to pass sequentially through the filter 106, the circulating pump 107, and into the adjustable heating tank 108. The control system automatically adjusts the input power of the adjustable heating tank 108 based on the temperature data detected by the air supply temperature sensor 103 and the built-in integrated intelligent energy-saving control method, heating the refrigerant in the adjustable heating tank 108 to the required temperature before it enters the first heat exchanger 109 to exchange heat with fresh air. After the fresh air undergoes indirect heat exchange with the high-temperature refrigerant in the first heat exchanger 109, its temperature rises to the required level and is delivered to the customer's location via the adjustable-speed air supply fan 101. Meanwhile, the refrigerant that has undergone heat exchange in the first heat exchanger 109 cools down and flows out, returning to the cold storage tank 105 via the distributor 112, thus completing the refrigerant heat release cycle.

[0157] The specific mode determination process of the control system is as follows: Figure 9 As shown.

[0158] In addition, the control system 100 is equipped with a peak-valley electricity pricing strategy, specifically:

[0159] When it is determined that the current electricity price is at its lowest point, the first mode is set to standby mode and the second mode is set to cold storage or heat storage mode; that is, in standby mode, when the electricity price is at its lowest point, the air conditioner is automatically controlled to store cold or heat to make full use of the electricity during that period.

[0160] When it is determined that the current electricity price is at its peak and the first mode is in the start-up mode, and there is pre-stored cold energy in the cold storage tank 105, the second mode is set to either the cold release or heat release mode until the cold energy in the cold storage tank 105 is completely released. Then, the second mode is set to either the cold storage + cooling mode or the heat storage + heating mode. During peak electricity prices, the pre-stored cold energy in the cold storage tank 105 is used first to reduce the overall power consumption of the air conditioner, stagger the peak electricity consumption, reduce electricity costs, and reduce the risk of peak electricity consumption.

[0161] In addition, when electricity prices are at their lowest or highest, the second mode is set to either cold storage / cooling + cooling or heat storage / heating + heating, based on the user's input of a fully cold or fully hot state.

[0162] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the technical solution of the present invention, and are not intended to limit the specific implementation of the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the claims of the present invention should be included within the protection scope of the claims of the present invention.

Claims

1. A multi-mode fresh air conditioner integrating cold and heat storage, characterized in that, The air conditioner includes a refrigeration and heating cycle system, a cold and heat storage cycle system, a temperature acquisition module, and a control system. The cooling and heating cycle system includes a cooling and heating branch, a cold storage and heat storage branch, and an air supply and heat exchange branch; the cold storage and heat storage branch and the cooling and heating branch are connected to form a cold storage and heat storage cycle loop, and the air supply and heat exchange branch and the cooling and heating branch are connected to form a cooling and heating cycle loop. The cooling and heating branch includes a first flow regulation module, a first cooling and heating switching module, a cooling and heating exchange module, a second flow regulation module, and a second cooling and heating switching module connected in sequence through pipelines. One end of the cooling and heating branch is connected to one end of the cold storage and heat storage branch and one end of the air supply and heat exchange branch through the first flow regulation module; the other end of the cooling and heating branch is connected to the other end of the cold storage and heat storage branch and the other end of the air supply and heat exchange branch through the second cooling and heating switching module. The control system achieves the switching between cooling and heating by controlling the first cooling and heating switching module and the second cooling and heating switching module to change the flow direction of refrigerant in the cooling and heating branch. The refrigeration and heating branch exchanges heat with the refrigerant passing through the refrigeration and heating branch through a refrigeration and heating exchange module. The control system regulates the refrigerant flow in the cooling and heating branch through the first flow regulation module and the second flow regulation module, as well as the flow from the cooling and heating branch to the cold storage and heat storage branch and the air supply and heat exchange branch. The cold and heat storage branch includes a heat exchange coil; the cold and heat storage circulation system includes a cold and heat storage tank; the heat exchange coil is installed in the cold and heat storage tank and connected to the cooling and heating branch. The heat exchange coil stores cold or heat in the cold storage tank by exchanging heat with the refrigerant in the cold storage tank. The refrigeration and heating cycle system stores cold or heat through the cold and heat storage branch. The cold and heat storage circulation system is used to release the stored cold or heat to achieve cooling or heating functions. The temperature acquisition module is used to acquire the air intake and supply temperatures of the air conditioner and the storage temperature of the cold and heat storage circulation system in real time; wherein, the temperature acquisition module is used to acquire the temperature of the refrigerant in the cold and heat storage tank in real time. The cold and heat storage circulation system also includes a circulation pump, an adjustable heating tank, and a first heat exchanger; The cold storage tank, the circulating pump, the adjustable heating tank, and the first heat exchanger are connected in sequence through pipelines to form a circulation loop. When the cold storage and heat storage circulation system performs a cold release cycle or a heat release cycle, the circulation pump will transport the refrigerant in the cold storage and heat storage tank to the first heat exchanger for heat exchange. The air supply and heat exchange branch includes a second heat exchanger and an air supply fan. The second heat exchanger and the air supply fan are connected by a pipeline and are respectively connected to both ends of the cooling and heating branch. The air supply fan also provides air supply power to the first heat exchanger. The control system is used to switch between multiple modes based on the temperature data collected by the temperature acquisition module, and to control the coordinated operation of each mode when switching modes. The control system is configured with a first mode state and a second mode state; The first mode states include standby mode, power-on mode, and power-off mode; The second mode includes one or a combination of cold storage, cold storage / cold release, cold release or refrigeration modes and one or a combination of heat storage, heat storage / heat release, heat release or heating modes; The control system operates in a mode that is a combination of the first mode state and the second mode state. When the second mode state of the control system includes cold storage or heat storage, the refrigerant is controlled to pass through the cold storage or heat storage branch; when the second mode state of the control system includes cold release or heat release, the cold storage or heat storage cycle system is controlled to perform a cold release cycle or a heat release cycle; when the second mode state of the control system includes cooling or heating, the refrigerant is controlled to pass through the air supply heat exchange branch.

2. A control method for an integrated cold and heat storage multi-mode fresh air conditioner, characterized in that, The control method is based on the integrated cold and heat storage multi-mode fresh air conditioner described in claim 1, and the control method includes: S1: Set the mode to determine the temperature in the control system; S2: Receive user input commands; S3: Set the first mode state according to the user's input command; S4: Set the second mode state based on the user input command, the temperature information collected by the temperature acquisition module, the mode determination temperature, and the first mode state.

3. The control method for an integrated cold storage and heat storage multi-mode fresh air conditioner according to claim 2, characterized in that, The temperature determination method for the setting mode includes: Set the cold state setting value T 1h Thermal state setpoint T 1d Cold storage state setpoint T 3d Thermal storage state setpoint T 3h 1. Cold storage hysteresis setpoint Δt 3d and thermal storage hysteresis setpoint Δt 3h .

4. The control method for an integrated cold storage and heat storage multi-mode fresh air conditioner according to claim 3, characterized in that, The process of setting the second mode state based on user input, temperature information collected by the temperature acquisition module, mode determination temperature, and the first mode state is as follows: S401: The temperature acquisition module acquires the air inlet temperature T1 of the air conditioner and the refrigerant temperature T3 of the cold storage tank. S402: Determine the first mode state input by the user. If the first mode state is standby state, execute step S403; if the first mode state is power-on state, execute step S407. S403: Determine T1 and T 1h The size, when T1>T 1h When T1 ≤ T, execute step S404; 1h When the time comes, proceed to step S405; S404: Determine if T3 and T 3d The size, when T3≤T 3d When T3 > T, execute step S4A; 3d At that time, execute step S4B; S405: Determine T1 and T2 1d The size when T1 <T 1d When T1≥T, proceed to step S406; 1d When the time comes, execute step S3A; S406: Determine T3 and T3 h The size, when T3≥T 3h When T3 is reached, step S3C is executed; when T3 is reached... <T 3h When the time comes, execute step S3A; S407: Determine T1 and T 1h The size, when T1>T 1h When T1 ≤ T, proceed to step S408; 1h When the time comes, proceed to step S410; S408: Determine whether the user input request is in a completely cold state. If yes, proceed to step S3H; otherwise, proceed to step S409. S409: Determine T3 and T 3d The size, when T3≤T 3d When T3 > T, execute step S3D; 3d At that time, execute step S3E; S410: Determine T1 and T 1d The size when T1 <T 1d When T1≥T, execute step S3J; 1d When the time comes, proceed to step S411; S411: Determine if the cooling / heating branch is faulty. If it is faulty, proceed to step S3K; if it is not faulty, proceed to step S412. S412: Determine whether the user input request is in a fully hot state. If yes, proceed to step S3I; otherwise, proceed to step S413. S413: Determine if T3 and T 3h The size, when T3≥T 3h When T3 is reached, step S3F is executed; when T3 is reached... <T 3h At that time, execute step S3G; S4A: The system is set to power off in the first mode. S4B: The system is set to the second mode, cold storage, until it is determined that T3≤T 3d When the time comes, execute step S3A; S4C: The system is set to the second mode, thermal storage, until T3 is determined. <T 3h When the time comes, execute step S3A; S4D: The system is set to the second mode of cooling until it determines whether T3 > T. 3d +Δt 3d At that time, execute step S3E; S4E: The system is set to the second mode state as cold storage + cooling, until it is determined that T3≤T 3d When the time comes, execute step S3D; S4F: The system is set to the second mode state as heat dissipation until T3 is determined. <T 3h -Δt 3h At that time, execute step S3G; S4G: The system is set to the second mode state as thermal storage + heating, until it is determined that T3 ≥ T. 3h When the time comes, proceed to step S3F; S4H: The system is set to the second mode state as cold storage / cold release + cooling; S4I: The system is set to the second mode status as heat storage / heat release + heating; S4J: The system is set to ventilation mode as the second mode. S4K: The system is set to emergency fault mode.

5. The control method for an integrated cold storage and heat storage multi-mode fresh air conditioner according to claim 4, characterized in that, The ventilation mode and emergency fault mode are specifically as follows: In the ventilation mode, the cold storage and heat storage circulation system and the cooling and heating circulation system stop operating, and only the air supply fan is turned on. The fault emergency mode is as follows: when T1 <T 1d When the cooling and heating cycle system fails to perform heating work normally, the second mode is set to the fault emergency mode. In this mode, the adjustable heating tank is controlled to heat the refrigerant in the cold storage and heat storage cycle system.

6. The control method for an integrated cold storage and heat storage multi-mode fresh air conditioner according to claim 5, characterized in that, The control method further includes: The peak-valley electricity pricing strategy is set up as follows: When it is determined that the current electricity price is at its lowest point, the first mode state is set to standby mode, and the second mode state is set to either cold storage or heat storage mode. When it is determined that the current electricity price is at its peak and the first mode is in the start-up mode, the second mode is set to either the cooling or heating mode until the cold energy of the cold storage tank is completely released, at which point the second mode is set to either the cold storage + cooling mode or the heating + heating mode. When it is determined that the current electricity price is at a low point or a high point, the start-up mode of cold storage / cooling + cooling under full cooling condition or the start-up mode of heat storage / heating + heating under full heating condition should be set first.

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