WO2024021600A1

WO2024021600A1 - Ice storage air conditioner, method, apparatus, and computer readable storage medium

Info

Publication number: WO2024021600A1
Application number: PCT/CN2023/078754
Authority: WO
Inventors: 邓树耀
Original assignee: 广东美的制冷设备有限公司
Priority date: 2022-07-26
Filing date: 2023-02-28
Publication date: 2024-02-01

Abstract

An ice storage air conditioner, a method, an apparatus, and a computer readable storage medium, wherein the ice storage air conditioner (200) comprises a water tank (210), a cool storage module, a rapid ice storage apparatus (100), and a control assembly. The cool storage module comprises an evaporator (220), a compressor (230) and a throttling assembly (250) which are sequentially communicated, wherein the evaporator (220) is located inside the water tank (210), a first temperature sensor used for measuring the temperature of the water tank is arranged in the water tank (210), a second temperature sensor used for measuring a return air temperature is arranged in the compressor (230), and a third temperature sensor used for measuring an evaporating temperature is arranged on the surface of the evaporator (220); the rapid ice storage apparatus (100) comprises a first control valve (120), a second control valve (130) and a liquid storage tank (110); and the control assembly is respectively connected to the first temperature sensor, the second temperature sensor, the third temperature sensor, the first control valve (120) and the second control valve (130).

Description

Ice storage air conditioner, method, device and computer-readable storage medium

Cross-references to related applications

This application requires that the application number submitted on July 26, 2022 be 202210882984.5, titled "Ice storage air conditioner, method, device and computer-readable storage medium", and the application number submitted on July 26, 2022 be 202221944085.5, Priority is granted to a Chinese patent application entitled "Rapid ice storage device and ice storage air conditioner having the same", the entire content of which is incorporated into this application by reference.

Technical field

The present application relates to the technical field of air conditioning, and in particular to an ice storage air conditioner, a method, a device and a computer-readable storage medium.

Background technique

Ice storage air conditioning equipment generally includes a compressor, evaporator, condenser, water tank and refrigerant. Ice storage air conditioning equipment uses the pressure generated by the compressor to drive the refrigerant to circulate in the air conditioning equipment, lowering the temperature of the evaporator surface, causing the water in the water tank to lower its temperature until it freezes, thereby achieving the purpose of cold storage.

During the initial cold storage process of current ice storage air conditioning equipment, due to the water temperature in the water tank being too high, the evaporator overheats, causing the refrigerant flowing into the evaporator to be completely evaporated, and the evaporator cannot discharge the liquid refrigerant, resulting in no cooling effect and poor cooling effect. The long ice storage time affects the user experience. Therefore, how to shorten the ice storage time of ice storage air conditioning equipment has become an urgent technical problem to be solved.

Contents of the invention

This application aims to at least partially solve one of the technical problems existing in the prior art. To this end, this application proposes an ice storage air conditioner, method, device and computer-readable storage medium, which can improve the refrigeration effect and shorten the ice storage time.

In a first aspect, embodiments of the present application provide an ice storage air conditioner, including:

water tank;

The cold storage module includes an evaporator, a compressor and a throttling assembly that are connected in sequence, wherein the evaporator is located inside the water tank, the throttling assembly includes a first end and a second end, and a useful In addition to the first temperature sensor for detecting the temperature of the water tank, a second temperature sensor for detecting the return air temperature is provided in the compressor, and a third temperature sensor for detecting the evaporation temperature is provided on the surface of the evaporator;

A rapid ice storage device includes a first control valve, a second control valve and a liquid storage tank. The liquid storage tank includes an inlet end and an outlet end. The inlet end is connected to the first end through the first control valve. , the outlet end is connected to the second end through the second control valve;

A control component is respectively connected to the first temperature sensor, the second temperature sensor, the third temperature sensor, the first control valve and the second control valve.

The ice storage air conditioner provided according to the embodiment of the present application has at least the following beneficial effects: the ice storage air conditioner uses the compressor to drive the refrigerant to flow through the throttling component to the evaporator for heat exchange, thereby reducing the surface temperature of the evaporator, thereby reducing the temperature in the water tank; It cools the liquid in the water tank until it freezes, saving cold energy. The inlet end of the liquid storage tank is connected to the first end of the throttling assembly through the first control valve, and the outlet end is connected to the second end of the throttling assembly through the second control valve. The control component can respectively control the first control valve and the second control valve according to the water tank temperature, return air temperature and evaporation temperature. When the water tank temperature is high, the control component can control the second control valve to open, so that the refrigerant stored in the liquid storage tank flows through the outlet end and the second control valve in sequence, and flows from the second end of the throttling component into the ice storage air conditioner. In the refrigerant circulation system, the amount of refrigerant circulation per unit time of the ice storage air conditioner is increased, so that it flows through The amount of refrigerant in the evaporator increases and the heat exchange efficiency is improved. The control component can also control the opening of the first control valve according to the return air temperature and evaporation temperature, so that the refrigerant of the ice storage air conditioner flows to the inlet end through the first end of the throttling component, so that the liquid storage tank recovers the refrigerant and avoids the refrigerant circulation of the ice storage air conditioner. Excessive volume will increase the exhaust pressure of the compressor and affect the refrigeration effect. Therefore, the first control valve and the second control valve can be controlled respectively according to the water tank temperature, return air temperature and evaporation temperature, so that the liquid storage tank releases refrigerant or recovers refrigerant, improves the refrigeration effect and shortens the ice storage time of the ice storage air conditioner.

In the above-mentioned ice storage air conditioner, the rapid ice storage device further includes an auxiliary throttle, and the auxiliary throttle is connected in parallel with the throttling assembly.

By adding an auxiliary throttle in parallel with the throttling component, the refrigerant flow rate of the ice storage air conditioner per unit time is increased, and the refrigerant flow rate flowing through the evaporator is increased, so that the evaporator has sufficient refrigerant for heat exchange, and the heat exchange efficiency is improved. , increase the cold storage speed and shorten the cold storage time.

In the above ice storage air conditioner, one end of the auxiliary throttle is connected to the inlet end through the first control valve, and the other end is connected to the second end through the second control valve.

When the second control valve is open, the refrigerant of the ice storage air conditioner can flow through the auxiliary throttle, thereby increasing the refrigerant flow rate of the ice storage air conditioner per unit time and increasing the cold storage speed. When the second control valve is closed, the refrigerant of the ice storage air conditioner cannot circulate through the auxiliary throttle. Therefore, the refrigerant throttling degree of the ice storage air conditioner is enhanced, which lowers the evaporation temperature and improves the relationship between the refrigerant at the evaporator and the water in the water tank. Heat exchange effect, speed up ice storage.

In a second aspect, an embodiment of the present application provides a control method for an ice storage air conditioner, which is applied to the ice storage air conditioner described in the embodiment of the first aspect. The control method includes:

When the first control valve and the second control valve are both in a closed state and the ice storage air conditioner operates for a preset first duration, obtain the water tank temperature;

When the water tank temperature is greater than or equal to the preset water temperature threshold, the second control valve is opened to cause the liquid storage tank to release refrigerant;

When the opening time of the second control valve reaches the preset second time, obtain the return air temperature and the evaporation temperature;

According to the return air temperature and the evaporation temperature, the first control valve and the second control valve are controlled to adjust the amount of refrigerant circulating in the ice storage air conditioner and accelerate the ice storage speed.

The control method of the ice storage air conditioner provided by the embodiment of the present application at least has the following beneficial effects: when the ice storage air conditioner runs for a preset first time period when the first control valve is closed and the second control valve is closed, the ice storage air conditioner can be considered as ice The cold storage air conditioner has been running stably. At this time, the water tank temperature is obtained, and the water tank temperature can be compared with the preset water temperature threshold. If the water tank temperature is greater than or equal to the water temperature threshold, it means that the ice storage air conditioner requires a large amount of cooling capacity to cool the water tank. Therefore, the second control valve is controlled to open, causing the liquid storage tank to release refrigerant and flow into the evaporator, thereby increasing the refrigerant circulation amount per unit time. This increases the amount of refrigerant flowing through the evaporator, improves the cooling effect, and shortens the ice storage time. When the duration of opening the second control valve reaches the preset second duration, it can be considered that the liquid storage tank has released sufficient refrigerant, and the refrigerant circulation in the ice storage air conditioner is sufficient. At this time, the return air temperature and evaporation temperature can be obtained, and the return air temperature and evaporation temperature can be obtained through the return The gas temperature and evaporation temperature are used to determine the current circulating refrigerant amount, thereby controlling the first control valve and the second control valve so that the liquid storage tank continues to release refrigerant or recover refrigerant, adjust the current circulating refrigerant amount, improve heat exchange efficiency, and speed up ice storage. .

In the above control method of ice storage air conditioner, when the water tank temperature is less than the preset water temperature threshold, both the first control valve and the second control valve are maintained in a closed state.

By comparing the water tank temperature and the water temperature threshold, the refrigerant circulation amount required by the current ice storage air conditioner is determined. When the water tank temperature is less than the water temperature threshold, it can be considered that the current operating status of the ice storage air conditioner is stable, the evaporation temperature is low, and the refrigerant amount is moderate. Therefore, there is no need to adjust the amount of refrigerant in the current cycle.

In the above control method of ice storage air conditioner, controlling the first control valve and the second control valve according to the return air temperature and the evaporation temperature includes:

When the difference between the return air temperature and the evaporation temperature is less than or equal to the preset first refrigeration threshold, the second control valve is closed.

By comparing the difference between the return air temperature and the evaporation temperature with the first refrigeration threshold, it is determined whether the amount of refrigerant in the current cycle is sufficient. If the difference between the return air temperature and the evaporation temperature is less than or equal to the first refrigeration threshold, it can be considered The current circulating refrigerant amount is sufficient and there is no need to continue to increase the refrigerant. Therefore, the second control valve is controlled to close and stop the liquid storage tank from releasing refrigerant to avoid excessive circulating refrigerant amount and affecting the heat exchange efficiency.

When the difference between the return air temperature and the evaporation temperature is greater than the preset first refrigeration threshold, the second control valve is maintained in the open state until the return air temperature is reacquired and the evaporation temperature is reacquired. The difference between them is less than or equal to the preset first cooling threshold.

If the difference between the return air temperature and the evaporation temperature is greater than the first refrigeration threshold, it can be considered that the amount of refrigerant currently circulating is small, and the liquid storage tank needs to continue to release refrigerant to increase the amount of refrigerant flowing through the evaporator. Therefore, the second control valve is kept open until the amount of refrigerant currently circulating in the ice storage air conditioner is sufficient, thereby increasing the heat exchange efficiency and improving the refrigeration effect.

In the above control method of ice storage air conditioner, after closing the second control valve, the method includes:

When the closing time of the second control valve reaches the preset third time, a new return air temperature and a new evaporation temperature are obtained again;

When the difference between the new return air temperature and the new evaporation temperature is less than or equal to the preset second refrigeration threshold, the first control valve is opened.

After the closing time of the second control valve reaches the preset third time, it can be considered that after the liquid storage tank stops releasing refrigerant, the ice storage air conditioner has been running stably, and the return air temperature and evaporation temperature can be obtained again. Through the return air temperature and evaporation temperature The difference is compared with the second cooling threshold to determine whether the amount of refrigerant in the current ice storage air conditioning cycle is too high. If the amount of circulating refrigerant is too large, the first control valve is controlled to open, allowing part of the refrigerant flowing out of the compressor to flow into the liquid storage tank for recovery, thereby reducing the amount of circulating refrigerant and avoiding compressor overload.

In the above control method of ice storage air conditioner, when the second control valve is closed for a preset third time period and the new return air temperature and the new evaporation temperature are reacquired, the method includes:

When the difference between the new return air temperature and the new evaporation temperature is greater than the preset second refrigeration threshold, the second control valve is maintained in a closed state until the reacquired return air temperature and the reacquired The difference between the evaporation temperatures is less than or equal to the preset second cooling threshold.

When the difference between the new return air temperature and the new evaporation temperature is greater than the second refrigeration threshold, the second control valve is kept closed, so that the liquid storage tank continues to recycle the refrigerant in the ice storage air conditioner, reducing the current circulating refrigerant amount. Until the amount of refrigerant circulating in the ice storage air conditioner is moderate, the refrigerant flowing through the evaporator can be completely evaporated, maintaining high heat exchange efficiency and shortening the ice storage time.

In the above control method of ice storage air conditioner, after opening the first control valve, the method includes:

When the opening time of the first control valve reaches the preset fourth time, a new return air temperature and a new evaporation temperature are obtained again;

When the difference between the new return air temperature and the new evaporation temperature is greater than or equal to the preset third refrigeration threshold, the first control valve is closed.

After the first control valve is opened, the liquid storage tank begins to recover the refrigerant in the ice storage air conditioning cycle. When the opening time of the first control valve reaches the preset fourth time, it can be considered that the liquid storage tank has recovered part of the refrigerant. air temperature and evaporation temperature The difference between them is compared with the third cooling threshold to determine the cooling capacity of the current ice storage air conditioning cycle. If the current circulating cooling capacity is moderate, the first control valve is controlled to close and the liquid storage tank is stopped from recovering refrigerant to avoid too little refrigerant circulation and lower heat exchange efficiency.

In the above-mentioned control method of ice storage air conditioner, when the opening time of the first control valve reaches the preset fourth time, after re-obtaining the new return air temperature and the new evaporation temperature, the method further includes:

When the difference between the new return air temperature and the new evaporation temperature is less than the preset third refrigeration threshold, the first control valve is maintained in the open state until the reacquired return air temperature and the reacquired The difference between the evaporation temperatures is greater than or equal to the preset third cooling threshold.

If the difference between the reacquired return air temperature and the reacquired evaporation temperature is less than the preset third refrigeration threshold, it means that the current amount of refrigerant in the ice storage air conditioning cycle is large, and the liquid storage tank still needs to continue to recycle refrigerant. Therefore, maintaining The first control valve remains open until the difference between the return air temperature obtained again and the evaporation temperature obtained again is greater than or equal to the third refrigeration threshold, that is, the amount of circulating refrigerant is moderate.

In the above control method of ice storage air conditioner, after closing the first control valve, the method includes:

When the closing time of the first control valve reaches the preset fifth time, a new water tank temperature is obtained again;

When the new water tank temperature is less than or equal to the preset ice storage temperature, the ice storage air conditioner is controlled to stop running.

After the closing time of the first control valve reaches the preset fifth time, it can be considered that the state of the ice storage air conditioner operating with the remaining refrigerant amount after recovery from the liquid storage tank has stabilized and has returned to the normal ice storage state. Therefore, the ice storage air conditioner can be reacquired. Water tank temperature, determine whether the water tank temperature has dropped to the target ice storage temperature, determine whether the ice storage operation is completed, and control the operation of the ice storage air conditioner.

In a third aspect, embodiments of the present application provide an operation control device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program Implement the control method as described in the embodiment of the second aspect above.

The operation control device provided according to the embodiment of the present application has at least the following beneficial effects: when the ice storage air conditioner has the first control valve closed and the second control valve closed, the operating time reaches the preset first time period, and it can be considered that the ice storage air conditioner has Stable operation, at this time the operation control device obtains the water tank temperature, and can compare the water tank temperature with the preset water temperature threshold. If the water tank temperature is greater than or equal to the water temperature threshold, it means that the ice storage air conditioner requires a large amount of cooling capacity to cool the water tank. Therefore, the operation control device controls the second control valve to open, causing the liquid storage tank to release refrigerant and flow into the evaporator, increasing the refrigerant capacity per unit time. The circulation volume increases the amount of refrigerant flowing through the evaporator, improves the refrigeration effect, and shortens the ice storage time. When the duration of opening the second control valve reaches the preset second duration, it can be considered that the liquid storage tank has released sufficient refrigerant, and the refrigerant circulation in the ice storage air conditioner is sufficient. At this time, the control device is operated to obtain the return air temperature and evaporation temperature. The amount of refrigerant in the current cycle is judged by the return air temperature and evaporation temperature, thereby controlling the first control valve and the second control valve so that the storage tank continues to release refrigerant or recover refrigerant, adjust the amount of refrigerant in the current cycle, improve heat exchange efficiency, and speed up storage. Ice speed.

In a fourth aspect, an embodiment of the present application provides an air conditioner, including the operation control device described in the above embodiment of the third aspect.

The air conditioner provided according to the embodiment of the present application has at least the following beneficial effects: when the air conditioner runs for a preset first time period when the first control valve is closed and the second control valve is closed, the air conditioner can be considered to have run stably. At this time, the water tank temperature is obtained, and the water tank temperature can be compared with the preset water temperature threshold. If the water tank temperature is greater than or equal to the water temperature threshold, it means that the current air conditioner requires a large amount of cooling capacity to cool the water tank. Therefore, the air conditioner controls the second control valve to open, causing the liquid storage tank to release refrigerant and flow into the evaporator, thereby improving the refrigerant circulation per unit time. The amount of refrigerant flowing through the evaporator increases, improving the cooling effect and shortening the ice storage time. When the duration of opening the second control valve reaches the preset second duration, it can be considered that the liquid storage tank has released sufficient refrigerant, and the refrigerant circulation in the air conditioner is sufficient. At this time, the air conditioner obtains the return air temperature and evaporation temperature, and uses the return air temperature to obtain the return air temperature and evaporation temperature. The gas temperature and evaporation temperature are used to determine the current circulating refrigerant amount, thereby controlling the first control valve and the second control valve to allow the liquid storage tank to continue Release refrigerant or recycle refrigerant, adjust the current circulating refrigerant amount, improve heat exchange efficiency, and speed up ice storage.

In a fifth aspect, embodiments of the present application provide a computer-readable storage medium that stores computer-executable instructions, and the computer-executable instructions are used to cause a computer to execute as described in the embodiment of the second aspect. control method.

The computer-readable storage medium provided according to the embodiment of the present application has at least the following beneficial effects: when the ice storage air conditioner runs for a preset first time period when the first control valve is closed and the second control valve is closed, the ice storage air conditioner can be considered to have ice storage The air conditioner has been running stably. At this time, the water tank temperature is obtained, and the water tank temperature can be compared with the preset water temperature threshold. If the water tank temperature is greater than or equal to the water temperature threshold, it means that the ice storage air conditioner requires a large amount of cooling capacity to cool the water tank. Therefore, the second control valve is controlled to open, causing the liquid storage tank to release refrigerant and flow into the evaporator, thereby increasing the refrigerant circulation amount per unit time. This increases the amount of refrigerant flowing through the evaporator, improves the cooling effect, and shortens the ice storage time. When the duration of opening the second control valve reaches the preset second duration, it can be considered that the liquid storage tank has released sufficient refrigerant, and the refrigerant circulation in the ice storage air conditioner is sufficient. At this time, the return air temperature and evaporation temperature can be obtained, and the return air temperature and evaporation temperature can be obtained through the return The gas temperature and evaporation temperature are used to determine the current circulating refrigerant amount, thereby controlling the first control valve and the second control valve so that the liquid storage tank continues to release refrigerant or recover refrigerant, adjust the current circulating refrigerant amount, improve heat exchange efficiency, and speed up ice storage. .

In a sixth aspect, embodiments of the present application provide a rapid ice storage device for use in ice storage air conditioners. The ice storage air conditioners include a water tank, an evaporator, a compressor and a throttling assembly that are connected in sequence. The throttling assembly includes a third At one end and at the second end, the evaporator is located inside the water tank, and the rapid ice storage device includes:

The liquid storage tank, including the inlet end and the outlet end, is used to store refrigerant;

A first control valve for connecting with the first end, and the first control valve is connected with the inlet end;

A second control valve is used to connect with the second end, and the second control valve is connected with the outlet end.

The rapid ice storage device provided according to the embodiment of the present application has at least the following beneficial effects: the ice storage air conditioner drives the refrigerant to flow to the evaporator through the compressor for heat exchange, lowering the temperature of the water tank, causing the water in the water tank to cool to freezing, and saving Cooling capacity. The inlet end of the liquid storage tank is connected to the first end of the throttling assembly through the first control valve, and the outlet end is connected to the second end of the throttling assembly through the second control valve. When the second control valve is open, the refrigerant stored in the liquid storage tank flows through the outlet end and the second control valve in sequence, and flows from the second end of the throttling assembly into the refrigerant circulation system of the ice storage air conditioner, thereby increasing the ice storage temperature. The amount of refrigerant circulating in the cold storage air conditioner per unit time increases the amount of refrigerant flowing through the evaporator and improves the heat exchange efficiency. When the first control valve is in the open state, the refrigerant of the ice storage air conditioner flows to the inlet end through the first end of the throttling component, so that the liquid storage tank recovers the refrigerant to avoid excessive refrigerant circulation of the ice storage air conditioner and increase compression. The exhaust pressure of the machine affects the cooling effect. Therefore, in the initial stage of cooling the high-temperature water in the water tank by the ice storage air conditioner, the second control valve is opened to release the refrigerant in the liquid storage tank, thereby increasing the amount of refrigerant flowing through the evaporator and increasing the cooling capacity. In addition, by opening the first control valve and closing the second control valve, part of the refrigerant can be recovered to the liquid storage tank to reduce the exhaust pressure of the compressor and improve the refrigeration effect. Therefore, the first control valve, the second control valve and the The cooperation of the liquid storage tanks improves the cooling effect and shortens the ice storage time of the ice storage air conditioner.

The computer-readable storage medium provided according to the embodiments of the present application has at least the following beneficial effects: Other features and advantages of the present application will be set forth in the subsequent description, and will become apparent in part from the description, or by implementing the present application. And understand. The objectives and other advantages of the application may be realized and obtained by the structure particularly pointed out in the specification and drawings.

Description of drawings

The present application will be further described below in conjunction with the accompanying drawings and examples;

Figure 1 is a schematic structural diagram of an ice storage air conditioner provided by an embodiment of the present application;

Figure 2 is a schematic structural diagram of an ice storage air conditioner provided by another embodiment of the present application;

Figure 3 is a flow chart of the control method of the ice storage air conditioner provided by the embodiment of the present application;

Figure 4 is a specific flow chart after step S100 in Figure 3;

Figure 5 is a specific flow chart of step S400 in Figure 3;

Figure 6 is a specific flow chart of step S400 in Figure 3;

Figure 7 is a specific flow chart after step S410 in Figure 5;

Figure 8 is a specific flow chart after step S411 in Figure 7;

Figure 9 is a specific flow chart after step S412 in Figure 7;

Figure 10 is a specific flow chart after step S414 in Figure 9;

Figure 11 is a specific flow chart after step S415 in Figure 9; and

Figure 12 is a schematic structural diagram of an operation control device provided by an embodiment of the present application.

Detailed ways

This section will describe the specific embodiments of the present application in detail. The preferred embodiments of the present application are shown in the accompanying drawings. The function of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand the present application. Each technical feature and the overall technical solution of the application shall not be construed as limiting the protection scope of the application.

It should be understood that in the description of the embodiments of the present application, if “first”, “second”, etc. are described, they are only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the intended purpose. The number of technical features indicated or the sequence relationship of the technical features indicated may be implicitly indicated. "At least one" means one or more, and "plurality" means two or more. "At least one of the following" and similar expressions refers to any combination of these items, including any combination of single or plural items.

In addition, unless otherwise clearly stated and limited, the term "connection/connection" should be understood in a broad sense. For example, it can be a fixed connection or a movable connection, a detachable connection or a non-detachable connection, or an integral connection; it can be Mechanical connection can also be electrical connection or can communicate with each other; it can be directly connected or indirectly connected through an intermediate medium.

In the description of the embodiments of the present application, reference is made to the terms "one embodiment/implementation", "another embodiment/implementation" or "certain embodiments/implementations", "in the above embodiment/implementation", etc. Description of means that a specific feature, structure, material or characteristic described in connection with an embodiment or example is included in at least two embodiments or embodiments of the present disclosure. In this disclosure, schematic representations of the above terms do not necessarily refer to the same illustrated embodiment or implementation. It should be noted that although a logical sequence is shown in the flowchart, in some cases, the steps shown or described may be performed in an order different from that in the flowchart.

It should be noted that the technical features involved in the various embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

Embodiments of the present application provide an ice storage air conditioner, a method, a device and a computer-readable storage medium, which determine whether the current refrigerant circulation required by the ice storage air conditioner is sufficient through the water tank temperature, return air temperature and evaporation temperature, thereby controlling the first The control valve and the second control valve allow the liquid storage tank to release refrigerant or recover refrigerant to adjust the refrigerant circulation amount in the ice storage air conditioner, improve heat exchange efficiency, improve refrigeration effect, and shorten ice storage time.

The embodiments of the present application will be further described below with reference to the accompanying drawings.

First, refer to FIG. 1 , which is a schematic structural diagram of an ice storage air conditioner 200 according to the first embodiment of the present application.

The ice storage air conditioner 200 includes a water tank 210, a cold storage module, a rapid ice storage device 100 and a control component. Among them, the cold storage mold The block includes an evaporator 220, a compressor 230, a condenser 240, and a throttling assembly 250. The compressor 230, the condenser 240, the throttling assembly 250 and the evaporator 220 are connected in sequence, and the evaporator 220 is connected with the compressor 230. The evaporator 220 can absorb heat from the low-pressure liquid refrigerant flowing out of the throttling assembly 250, and evaporate it into a low-pressure state. The gaseous refrigerant lowers the surface temperature of the evaporator 220 and delivers the low-pressure gaseous refrigerant to the compressor 230 for circulation. Since the evaporator 220 is disposed inside the water tank 210, lowering the surface temperature of the evaporator 220 can lower the water temperature in the water tank 210, thereby achieving the purpose of saving cooling capacity. The throttling assembly 250 includes a first end 251 and a second end 252, wherein the first end 251 is connected to the evaporator 220, and the second end 252 is connected to the condenser 240.

The rapid ice storage device 100 includes a liquid storage tank 110, a first control valve 120 and a second control valve 130. The liquid storage tank 110 includes an inlet end 111 and an outlet end 112, and the liquid storage tank 110 can store refrigerant. The outlet end 112 of the liquid storage tank 110 is connected to the second control valve 130, and the second control valve 130 can be connected to the second end 252. Therefore, when the second control valve 130 is opened, the refrigerant in the liquid storage tank 110 can flow from the outlet. It flows out of the end 112, flows through the opened second control valve 130, and flows from the second end 252 into the ice storage air conditioner 200, thereby increasing the overall amount of refrigerant circulating in the ice storage air conditioner 200 and increasing the amount of refrigerant flowing through the evaporator 220 per unit time. The amount of refrigerant increases the heat exchange efficiency of the evaporator 220. The inlet end 111 of the liquid storage tank 110 is connected to the first control valve 120, and the first control valve 120 can be communicated with the first end 251. Therefore, when the first control valve 120 is opened and the second control valve 130 is closed, the refrigerant of the ice storage air conditioner 200 can flow out from the first end 251, flow through the first control valve 120, and flow into the liquid storage tank 110 from the inlet end 111, Since the second control valve 130 is closed, the refrigerant after flowing into the liquid storage tank 110 cannot flow out from the outlet end 112 and the second control valve 130 to achieve the purpose of recovering the refrigerant and avoid excessive refrigerant circulating in the ice storage air conditioner 200, resulting in The suction pressure and discharge pressure of compressor 230 are too high, which inhibits heat exchange efficiency.

Since the current cold storage equipment performs cooling and refrigerating after completing the ice storage, in this cycle, the ice storage process is to lower the temperature of the water at normal temperature in the water tank 210 until it freezes. In the initial stage of ice storage, the water temperature in the water tank 210 is relatively high, and the evaporator 220 is prone to overheating. The refrigerant flows into the evaporator 220 and evaporates rapidly, resulting in a lack of liquid refrigerant in the part of the evaporator 220 near the outlet end 112. The evaporator 220 It cannot effectively exchange heat and the heat exchange efficiency is low. In addition, overheating of the evaporator 220 will easily cause the return air temperature of the compressor 230 to increase, and the load of the compressor 230 to increase, thereby causing the temperature of the evaporator 220 to continue to increase, again reducing the heat exchange efficiency and prolonging the ice storage time.

A first temperature sensor is provided in the water tank 210, a second temperature sensor is provided in the compressor 230, and a third temperature sensor is provided in the evaporator 220. The first temperature sensor can measure the water tank temperature in the current state of the water tank 210, that is, the water temperature. , the second temperature sensor can measure the return air temperature of the compressor 230, and the third temperature sensor can measure the evaporation temperature of the evaporator 220. In addition, the ice storage air conditioner 200 is also provided with a control component, which can obtain the water tank temperature from the first temperature sensor, the return air temperature from the second temperature sensor, and the evaporation temperature from the third temperature sensor. The control component can control the first control valve 120 and the second control valve 130 according to the water tank temperature, return air temperature and evaporation temperature, thereby adjusting the amount of circulating refrigerant. For example, when the water tank temperature is high, control The second control valve 130 is opened, and the first control valve 120 is controlled to be closed, so that the refrigerant in the liquid storage tank 110 will flow through the outlet end 112 and the second control valve 130, and flow from the second end 252 to the evaporator 220, increasing The refrigerant circulation volume of the ice storage air conditioner 200 is reduced, and the refrigerant volume flows into the evaporator 220, so that the evaporator 220 has sufficient refrigerant for heat exchange, reducing the temperature of the evaporator 220, and at the same time reducing the return air temperature of the compressor 230, improving the cooling effect. , shorten the ice storage time.

In order to avoid excessive refrigerant released from the liquid storage tank 110, resulting in excessive refrigerant circulating in the ice storage air conditioner 200 and reducing the heat exchange efficiency, the control component can control the opening of the second control valve 130 according to the evaporation temperature and the return air temperature, After the liquid storage tank 110 releases refrigerant to the evaporator 220, the second control valve 130 is closed to stop the liquid storage tank 110 from releasing refrigerant. Therefore, the refrigerant released from the liquid storage tank 110 circulates in the ice storage air conditioner 200. The amount of refrigerant circulating in the ice storage air conditioner 200 is greater than the initial circulation amount, which makes up for the insufficient initial refrigerant amount of the ice storage air conditioner 200 and improves the efficiency of the ice storage air conditioner 200. The heat exchange efficiency of the evaporator 220 is reduced A low return air temperature from the compressor 230 helps increase the cooling rate of the evaporator 220 and shortens the ice storage time.

As the ice storage air conditioner 200 continues to operate, the evaporation temperature gradually decreases, and the amount of refrigerant used for heat exchange by the evaporator 220 per unit time gradually decreases and remains stable. After the liquid storage tank 110 releases part of the refrigerant, the refrigerant circulation volume in the ice storage air conditioner 200 is large, and too much liquid refrigerant flows into the evaporator 220. However, the evaporation area of the evaporator 220 is fixed, resulting in part of the liquid refrigerant not being completely evaporated. , causing part of the liquid refrigerant and the gaseous refrigerant to form a gas-liquid mixed state. When the refrigerant in the gas-liquid mixed state enters the compressor 230, a liquid slugging problem occurs in the compressor 230, thereby affecting the normal operation of the compressor 230. At the same time, the amount of circulating refrigerant in the ice storage air conditioner 200 is large, which easily increases the exhaust pressure of the compressor 230 and inhibits the heat exchange efficiency. Therefore, based on the comparison between the return air temperature and the evaporation temperature, the first control valve 120 is opened and the second control valve 130 is closed, so that the refrigerant in the ice storage air conditioner 200 flows out from the first end 251, passes through the first control valve 120, and passes through The inlet end 111 of the liquid storage tank 110 flows into the liquid storage tank 110 to achieve the purpose of recovering the refrigerant and recover the excess refrigerant circulating in the ice storage air conditioner 200 . The first control valve 120 is closed, and the liquid storage tank 110 stops recovering refrigerant. When the liquid storage tank 110 recovers the refrigerant of the ice storage air conditioner 200, the refrigerant circulation amount of the ice storage air conditioner 200 returns to the initial refrigerant amount, and the refrigerant flowing through the evaporator 220 The refrigerant is evaporated exactly, maintaining high heat exchange efficiency and shortening the ice storage time.

According to the water tank temperature, evaporation temperature and return air temperature, the first control valve 120 and the second control valve 130 are adjusted so that the liquid storage tank 110 can release the refrigerant into the ice storage air conditioner 200 and increase the flow through the evaporator 220 in the initial cold storage stage. The refrigerant amount improves the refrigeration effect in the initial cold storage stage, and also allows the liquid storage tank 110 to recover part of the refrigerant in the ice storage air conditioner 200, and restores the refrigerant circulation amount to the initial refrigerant amount in the stable stage of cold storage, maintaining the high exchange rate of the evaporator 220. heat rate and shorten ice storage time.

It should be noted that the ice storage air conditioner 200 includes a water pump 280, a refrigeration heat exchanger 260 and a fan 270. The water pump 280, the refrigeration heat exchanger 260 and the water tank 210 are connected to each other. The water pump 280 can transport the liquid in the water tank 210 to the refrigeration heat exchanger 260. The low-temperature liquid exchanges heat with the outside air in the refrigeration heat exchanger 260, reducing the The temperature of the environment where the cooling heat exchanger 260 is located, and the heat-exchanged liquid returns to the water tank 210, forming a cycle. The fan 270 is disposed on one side of the refrigeration heat exchanger 260. The fan 270 can blow out the low-temperature air around the refrigeration heat exchanger 260 to achieve a cooling effect.

Referring to FIG. 2 , FIG. 2 is a schematic structural diagram of an ice storage air conditioner 200 according to another embodiment of the first aspect of the present application. It can be understood that the ice storage air conditioner 200 is also provided with an auxiliary throttle 140. The auxiliary throttle 140 can be connected in parallel with the throttling assembly 250 in the ice storage air conditioner 200, so that the refrigerant of the ice storage air conditioner 200 can flow through the auxiliary throttle. The throttle 140 increases the refrigerant flow rate of the ice storage air conditioner 200 and increases the amount of refrigerant flowing through the ice storage air conditioner 200 per unit time, so that the evaporator 220 has sufficient refrigerant for heat exchange, thereby increasing the heat exchange efficiency and improving the cooling effect. , shorten the ice storage time. Wherein, both the auxiliary throttle 140 and the throttling assembly 250 may be capillary tubes.

It can be understood that the auxiliary throttle 140 includes a first auxiliary end 141 and a second auxiliary end 142. The first auxiliary end 141 is connected to the first control valve 120, and the second auxiliary end 142 is connected to the second control valve 130. , wherein the first auxiliary end 141 is connected to the first end 251 of the throttling assembly 250 , and the first auxiliary end 141 is connected to the inlet end 111 of the liquid storage tank 110 through the first control valve 120 . Therefore, the on-off state of the first control valve 120 does not affect the flow of refrigerant from the first auxiliary end 141 into the auxiliary throttle 140 . The second auxiliary end 142 is connected to the inlet end 111 of the liquid storage tank 110 , and the second auxiliary end 142 is connected to the second end 252 of the throttling assembly 250 through the second control valve 130 . Therefore, when the second control valve 130 is closed, the refrigerant cannot flow out to the evaporator 220 through the auxiliary throttle 140 . When the second control valve 130 is opened, the refrigerant may flow out from the second auxiliary end 142 of the auxiliary throttle 140 and, after passing through the second control valve 130 , flow to the evaporator 220 .

Therefore, when the second control valve 130 is opened, the refrigerant of the ice storage air conditioner 200 can flow to the evaporator 220 through the throttling assembly 250 and the auxiliary throttle 140 at the same time, thereby increasing the flow rate of the refrigerant per unit time. At the same time, the second control valve 130 is opened, and the refrigerant in the liquid storage tank 110 also flows to the evaporator 220 through the second control valve 130, thereby increasing the refrigerant supply of the ice storage air conditioner 200. The amount of refrigerant flowing through the evaporator 220 per unit time increases, thereby improving the heat exchange efficiency of the evaporator 220 and shortening the ice storage time.

When the first control valve 120 and the second control valve 130 are closed, the refrigerant cannot pass through the auxiliary throttle 140 and the refrigerant can only flow to the evaporator 220 through the throttling assembly 250. This is equivalent to increasing the throttling degree of the ice storage air conditioner 200 and reducing the The temperature of the refrigerant can thereby speed up the heat exchange between the low-temperature refrigerant and the water inside the water tank 210 and shorten the ice storage time.

When the first control valve 120 is open and the second control valve 130 is closed, the refrigerant cannot pass through the auxiliary throttle 140 and the refrigerant in the liquid storage tank 110 cannot flow to the evaporator 220. However, the refrigerant of the ice storage air conditioner 200 cannot pass through the third control valve 130. The second control valve 130 flows to the inlet end 111 of the liquid storage tank 110, and at the same time can flow to the evaporator 220 through the throttling assembly 250. Therefore, part of the refrigerant can be recovered into the liquid storage tank 110 while maintaining normal cooling of the ice storage air conditioner 200. Reduce the amount of refrigerant circulating in the ice storage air conditioner 200, reduce the exhaust pressure of the compressor 230, avoid liquid slugging, and improve the heat exchange efficiency of the evaporator 220.

The ice storage air conditioner 200 described in the embodiments of the present application is to more clearly illustrate the technical solutions of the embodiments of the present application, and does not constitute a limitation to the technical solutions provided by the embodiments of the present application. Those skilled in the art will know that with the ice storage air conditioners 200 and the emergence of new application scenarios, the technical solutions provided by the embodiments of this application are also applicable to similar technical problems.

Those skilled in the art can understand that the structure of the ice storage air conditioner 200 shown in Figures 1 and 2 does not limit the embodiments of the present application, and may include more or less components than shown in the figures, or a combination of certain components. components, or different component arrangements.

Based on the above structure of the ice storage air conditioner 200, various embodiments of the control method of the ice storage air conditioner 200 of the present application are proposed.

In the second aspect, refer to FIG. 3 , which is a flow chart of a control method for an ice storage air conditioner provided by an embodiment of the present application. The control method for an ice storage air conditioner can be applied to the ice storage air conditioner 200 shown in FIG. 1 or 2 . , the control method of the ice storage air conditioner includes but is not limited to the following steps:

Step S100, when both the first control valve and the second control valve are in a closed state and the ice storage air conditioner runs for a preset first duration, obtain the water tank temperature;

Step S200, when the water tank temperature is greater than or equal to the preset water temperature threshold, open the second control valve to release the refrigerant from the liquid storage tank;

Step S300, when the opening time of the second control valve reaches the preset second time, obtain the return air temperature and evaporation temperature;

Step S400: Control the first control valve and the second control valve according to the return air temperature and evaporation temperature to adjust the amount of refrigerant circulating in the ice storage air conditioner and speed up the ice storage speed.

It can be understood that after the initial start-up of the ice storage air conditioner, the continuous operation time with the first control valve closed and the second control valve closed reaches the preset first time period. It can be considered that the ice storage air conditioner has been running stably. At this time, the ice storage air conditioner can be operated stably. The temperature of the water tank is obtained through the first temperature sensor to determine whether the temperature of the water tank is high, that is, whether the current ice storage air conditioner requires a large amount of cooling capacity to cool the liquid in the water tank. When the water tank temperature is greater than or equal to the preset water temperature threshold, it can be considered that the current water temperature in the water tank is high, and a large amount of cooling capacity is required to cool the water tank. Since the evaporator is located inside the water tank, the evaporator temperature is easily too high, causing the refrigerant to flow in. The evaporator is quickly evaporated, and there is no liquid refrigerant flowing through the part of the evaporator surface near the outlet, so the heat exchange efficiency of the evaporator is low. Moreover, overheating of the evaporator can easily lead to an increase in the return air temperature of the compressor and an increase in the load on the compressor, which in turn causes the temperature of the evaporator to continue to rise, again reducing the heat exchange efficiency and prolonging the ice storage time. Therefore, when the water tank temperature is greater than or equal to the water temperature threshold, the second control valve is controlled to open, so that the refrigerant in the liquid storage tank flows through the outlet end and the second control valve, and flows into the evaporator from the second end, increasing the ice storage air conditioner in the unit The amount of refrigerant circulating within a certain period of time allows enough refrigerant to flow into the evaporator and perform heat exchange, lowering the evaporator temperature, improving heat exchange efficiency, improving the refrigeration effect, and shortening the ice storage time.

Excessive refrigerant circulating in the ice storage air conditioner will cause too much refrigerant to flow into the evaporator, but the evaporation area of the evaporator is fixed. Part of the refrigerant cannot be completely evaporated after flowing into the evaporator, and the heat exchange efficiency is reduced, causing part of the liquid refrigerant to gaseous cold The refrigerant forms a gas-liquid mixed state. When the refrigerant in the gas-liquid mixed state enters the compressor, it will cause liquid shock problems in the compressor and affect the normal operation of the compressor. The compressor drives excessive refrigerant to circulate, and the load on the compressor is large, and the exhaust pressure and return air pressure are high, which inhibits the heat exchange efficiency. After increasing the refrigerant circulating in the ice storage air conditioner, as the ice storage air conditioner continues to operate, the evaporator temperature gradually decreases, and the amount of refrigerant that the evaporator exchanges heat per unit time also gradually decreases, that is, the refrigerant required by the evaporator. The amount of refrigerant gradually decreases and returns to the initial amount of refrigerant. Therefore, it is necessary to reduce the amount of refrigerant circulating in the ice storage air conditioner to maintain high heat exchange efficiency and shorten the ice storage time.

Therefore, after the second control valve is opened and the operating time of the ice storage air conditioner reaches the preset second time, it can be considered that sufficient refrigerant has been released from the liquid storage tank, and the evaporation temperature and return air temperature are used to determine the current circulating refrigerant in the ice storage air conditioner. Whether the amount of refrigerant is sufficient is to use the superheat degree to determine whether the amount of refrigerant in the current cycle is too much. When the degree of superheat is low, it can be considered that the amount of refrigerant currently circulating is large, and the refrigerant circulating in the ice storage air conditioner needs to be recovered. Therefore, the first control valve is controlled to open, and the second control valve is controlled to close, so that the ice storage air conditioner circulates The refrigerant flows out from the first end, passes through the first control valve, and flows into the liquid storage tank from the inlet end to achieve the purpose of recovering the refrigerant, reducing the amount of refrigerant circulating in the ice storage air conditioner, so that the refrigerant flowing through the evaporator is evaporated. , maintain high heat exchange efficiency and shorten ice storage time.

Therefore, according to the water tank temperature, return air temperature and evaporation temperature, the first control valve and the second control valve are controlled to achieve the purpose of adjusting the amount of refrigerant circulating in the ice storage air conditioner, so that there is sufficient refrigerant in the evaporator. Heat exchange evaporates, and the refrigerant flowing through the evaporator is completely evaporated, improving the heat exchange efficiency and shortening the ice storage time.

Referring to Figure 4, Figure 4 is a specific flow chart after step S100 in Figure 3. In the example of Figure 4, the steps after step S100 include but are not limited to the following steps:

Step S110, when the water tank temperature is less than the preset water temperature threshold, both the first control valve and the second control valve are kept in a closed state.

It can be understood that when the water tank temperature is less than the water temperature threshold, it can be considered that the current cooling capacity required by the ice storage air conditioner is moderate, and the current circulating refrigerant amount is moderate, and there is no need to adjust the circulating refrigerant amount. Therefore, maintaining the first When the control valve is closed and the second control valve is closed, high heat exchange efficiency can be maintained.

Referring to Figure 5, Figure 5 is a specific flow chart of step S400 in Figure 3. In the example of Figure 5, step S400 includes but is not limited to the following steps:

Step S410, when the difference between the return air temperature and the evaporation temperature is less than or equal to the preset first refrigeration threshold, close the second control valve.

It can be understood that the difference between the return air temperature and the evaporation temperature is the superheat degree. After the second control valve is opened, that is, after the liquid storage tank releases refrigerant to the evaporator, when the superheat degree is less than or equal to the preset first According to the refrigeration threshold, it can be considered that the current circulating refrigerant amount of the ice storage air conditioner is sufficient, and there is no need to continue to replenish the refrigerant. Therefore, the second control valve is controlled to close and stop the liquid storage tank from releasing refrigerant to avoid excessive circulating refrigerant amount. At this time, the amount of refrigerant circulating in the ice storage air conditioner is larger than the initial amount of refrigerant, and sufficient refrigerant flows through the evaporator to increase the heat exchange efficiency of the evaporator and improve the refrigeration effect.

It should be noted that the ice storage air conditioner can be equipped with an auxiliary throttle. After the second control valve is closed, the refrigerant cannot pass through the auxiliary throttle, and the refrigerant can only flow to the evaporator through the throttling component. This is equivalent to an ice storage air conditioner. The throttling degree is strengthened and the temperature of the refrigerant is lowered, thereby speeding up the heat exchange between the low-temperature refrigerant and the liquid inside the water tank and shortening the ice storage time.

Referring to Figure 6, Figure 6 is a specific flow chart of step S400 in Figure 3. In the example of Figure 6, step S400 includes but is not limited to the following steps:

Step S420, when the difference between the return air temperature and the evaporation temperature is greater than the preset first refrigeration threshold, the second control valve is maintained in the open state until the difference between the reacquired return air temperature and the reacquired evaporation temperature The value is less than or equal to the default First cooling threshold.

It can be understood that after the second control valve is opened, when the superheat is greater than the first refrigeration threshold, that is, the difference between the return air temperature and the evaporation temperature is large, it can be considered that the amount of refrigerant in the current ice storage air conditioning cycle is insufficient and the evaporation There is insufficient refrigerant in the device for heat exchange and evaporation, and the liquid storage tank still needs to continue to release refrigerant, increasing the amount of refrigerant in the ice storage air conditioning cycle. When the superheat is greater than the first refrigeration threshold, the second control valve is kept open so that the liquid storage tank continues to replenish refrigerant. When the opening time of the second control valve reaches the preset second time again, the return air temperature from the second temperature sensor and the evaporation temperature from the third temperature sensor are reacquired. Use the reacquired return air temperature and the reacquired evaporation temperature to calculate the new superheat degree and determine whether the new superheat degree is less than or equal to the first refrigeration threshold, that is, whether the current circulating refrigerant amount is sufficient. If the new superheat degree is less than or equal to It is equal to the first refrigeration threshold, indicating that the current circulating refrigerant amount is sufficient, and the second control valve can be closed to stop the liquid storage tank from continuing to release refrigerant. If the new superheat degree is still greater than the first refrigeration threshold, you need to continue to open the second control valve so that the liquid storage tank continues to release refrigerant until the amount of refrigerant in the ice storage air conditioning cycle is sufficient, that is, the new superheat degree is less than or equal to the first refrigeration threshold. threshold to achieve the purpose of improving the heat exchange efficiency of the evaporator, improving the refrigeration effect and shortening the ice storage time.

Referring to Figure 7, Figure 7 is a specific flow chart after step S410 in Figure 5. In the example of Figure 7, the steps after step S410 include but are not limited to the following steps:

Step S411, when the closing time of the second control valve reaches the preset third time, the new return air temperature and the new evaporation temperature are reacquired;

Step S412: When the difference between the new return air temperature and the new evaporation temperature is less than or equal to the preset second cooling threshold, the first control valve is opened.

It can be understood that when the amount of refrigerant circulating in the ice storage air conditioner is sufficient, that is, the difference between the return air temperature and the evaporation temperature is less than or equal to the first refrigeration threshold, the second control valve is closed, so that the ice storage air conditioner operates at the increased Refrigerant volume operation. When the refrigerant operation time of the ice storage air conditioner reaches the preset third time period with a stable increment, that is, the closing time of the second control valve reaches the preset third time period, it can be considered that the ice storage air conditioner has been operating stably and the evaporation temperature has decreased. , the amount of refrigerant required by the current ice storage air conditioner is reduced, so part of the refrigerant needs to be recovered. Therefore, the return air temperature from the second temperature sensor and the evaporation temperature from the third temperature sensor are obtained again, and the new return air is used The difference between the temperature and the new evaporation temperature determines whether the amount of refrigerant in the current cycle is too much. When the difference is less than or equal to the preset second refrigeration threshold, it means that the amount of refrigerant in the current cycle is too much. The first control valve can be opened and the second control valve can be kept closed so that the refrigerant of the ice storage air conditioner flows out from the first end. It flows through the first control valve and flows into the liquid storage tank from the inlet end to achieve the purpose of recovering the refrigerant and reducing the amount of circulating refrigerant, so that the refrigerant flowing through the evaporator is completely evaporated, maintaining high heat exchange efficiency and shortening the ice storage time. .

Referring to Figure 8, Figure 8 is a specific flow chart after step S411 in Figure 7. In the example of Figure 8, the steps after step S411 include but are not limited to the following steps:

Step S413, when the difference between the new return air temperature and the new evaporation temperature is greater than the preset second refrigeration threshold, maintain the second control valve in the closed state until the reacquisition of the return air temperature and the reacquisition of the evaporation temperature The difference between them is less than or equal to the preset second cooling threshold.

It can be understood that after the second control valve is closed, the difference between the new return air temperature and the new evaporation temperature is greater than the second refrigeration threshold, indicating that the amount of refrigerant in the current cycle is sufficient, that is, the return air temperature is relatively high, and the current The evaporator still needs a large amount of refrigerant for heat exchange. Therefore, the second control valve and the first control valve are still kept in a closed state, so that the ice storage air conditioner operates with an increased amount of refrigerant to ensure that sufficient refrigerant enters the evaporator. Heat exchange is carried out in the device to achieve high heat exchange efficiency and shorten the ice storage time.

As the ice storage air conditioner continues to operate, the evaporator temperature gradually decreases, and the refrigerant used by the evaporator to exchange heat per unit time The amount of refrigerant required by the evaporator gradually decreases, that is, the amount of refrigerant required by the evaporator gradually decreases and returns to the initial amount of refrigerant. Therefore, it is necessary to obtain the evaporation temperature and return air temperature again at a preset third time interval to determine whether the current amount of refrigerant required by the evaporator has decreased. . When the difference between the return air temperature and the evaporation temperature is less than or equal to the second cooling threshold, it means that the return air temperature is already low and the amount of refrigerant required by the current evaporator is reduced. The amount of refrigerant circulating in the ice storage air conditioner is reduced to maintain High heat exchange efficiency and shortened ice storage time.

Referring to Figure 9, Figure 9 is a specific flow chart after step S412 in Figure 7. In the example of Figure 9, the steps after step S412 include but are not limited to the following steps:

Step S414, when the opening time of the first control valve reaches the preset fourth time, the new return air temperature and the new evaporation temperature are reacquired;

Step S415: When the difference between the new return air temperature and the new evaporation temperature is greater than or equal to the preset third refrigeration threshold, the first control valve is closed.

It can be understood that when the first control valve is opened and the second control valve is closed, the refrigerant in the ice storage air conditioner flows into the liquid storage tank through the first end, the first control valve and the inlet end, and the refrigerant in the liquid storage tank cannot It flows into the evaporator through the outlet end, the second control valve and the second end. Therefore, the effect of recovering the refrigerant is achieved and the amount of refrigerant in the ice storage air conditioning cycle is reduced. Therefore, when the time after the first control valve is opened reaches the preset fourth time, it can be considered that the liquid storage tank has recovered part of the circulating refrigerant, and it is necessary to obtain the return air temperature and evaporation temperature again to determine the circulating refrigerant in the ice storage air conditioner. Whether the amount is sufficient to continue recycling refrigerant or stop recycling refrigerant. If the difference between the new return air temperature and the new evaporation temperature is greater than or equal to the preset third refrigeration threshold, it means that the liquid storage tank has recovered enough refrigerant, and the current amount of refrigerant in the ice storage air conditioning cycle is sufficient, and there is no need to continue to recover it. The refrigerant, therefore, is controlled to close the first control valve and stop the refrigerant from flowing into the liquid storage tank through the first control valve to achieve the effect of stopping the recovery of refrigerant, maintaining high heat exchange efficiency of the ice storage air conditioner and shortening the ice storage time.

Referring to Figure 10, Figure 10 is a specific flow chart after step S414 in Figure 9. In the example of Figure 10, the steps after step S414 include but are not limited to the following steps:

Step S416, when the difference between the new return air temperature and the new evaporation temperature is less than the preset third refrigeration threshold, the first control valve is maintained in the open state until the reacquired return air temperature and the reacquired evaporation temperature are obtained. The difference between them is greater than or equal to the preset third cooling threshold.

It can be understood that when the time after the first control valve is opened reaches the preset fourth time, the return air temperature and evaporation temperature can be obtained again to determine whether the liquid storage tank has recovered part of the circulating refrigerant. If the difference between the new return air temperature and the new evaporation temperature is less than the preset third refrigeration threshold, it means that the current return air temperature is low and there is a large amount of refrigerant circulating in the ice storage air conditioner, that is, the liquid storage tank is not recovered. The amount of refrigerant is sufficient. Therefore, it is still necessary to keep the first control valve open so that the refrigerant flows into the liquid storage tank through the first control valve for recovery.

If the first control valve is left open for a long time, that is, the refrigerant is recovered for a long time, it is easy to cause a small amount of refrigerant in the ice storage air conditioning cycle, reduce the heat exchange efficiency, and extend the ice storage time. Therefore, after the first control valve is opened, the return air temperature and evaporation temperature in the current state are periodically obtained to determine whether the amount of refrigerant circulating in the ice storage air conditioner is too high in the current state. If the amount of refrigerant is too large, the refrigerant will continue to be recycled; if the amount of refrigerant is not too large, that is, the refrigerant amount is sufficient, the refrigerant recovery will be stopped, thereby avoiding too little circulating refrigerant and affecting the heat exchange of the evaporator.

Referring to Figure 11, Figure 11 is a specific flow chart after step S415 in Figure 9. In the example of Figure 11, the steps after step S415 include but are not limited to the following steps:

Step S417, when the closing time of the first control valve reaches the preset fifth time, reacquire a new water tank temperature;

Step S418: When the new water tank temperature is less than or equal to the preset ice storage temperature, the ice storage air conditioner is controlled to stop running.

It is understandable that the first control valve is closed, that is, the liquid storage tank stops recovering refrigerant, indicating that the ice storage air conditioner has returned to its initial state. Run with the refrigerant amount. If the closing time of the first control valve reaches the preset fifth time, it means that the ice storage air conditioner has been stably operating in the normal ice storage state. Therefore, the water tank temperature can be reacquired to determine whether the water tank temperature has dropped to the target ice storage temperature to determine Whether the ice storage operation is completed. If the temperature of the new water tank is less than or equal to the ice storage temperature, it means that the liquid in the water tank has cooled and frozen, and the ice storage operation is completed. The ice storage air conditioner can be controlled to stop running and save power. If the temperature of the new water tank is greater than the ice storage temperature, it means that the liquid in the water tank has not been completely cooled and the ice storage operation has not been completed. It is still necessary to control the compressor of the ice storage air conditioner to continue to run and continue to cool the liquid in the water tank until the preset interval is reached again. Assuming that the water tank temperature obtained after the fifth period of time is less than or equal to the ice storage temperature, the ice storage air conditioner is controlled to stop operating to ensure the ice storage capacity.

Referring to Fig. 12, Fig. 12 is a schematic structural diagram of the operation control device 1200 provided by the third embodiment of the present application. The operation control device 1200 includes: a memory 1210, a processor 1220 and a device stored on the memory 1210 and capable of The computer program runs on the processor 1220. When the processor 1220 executes the computer program, the control method of the ice storage air conditioner in the above embodiment is implemented.

As a non-transitory computer-readable storage medium, the memory 1210 can be used to store non-transitory software programs and non-transitory computer executable programs, such as the control method for ice storage air conditioning in the above embodiment of the present application. The processor 1220 executes the non-transient software programs and instructions stored in the memory 1210 to implement the control method of the ice storage air conditioner in the above embodiments of the present application.

The memory 1210 may include a storage program area and a storage data area, wherein the storage program area may store an operating system and an application program required for at least one function; the storage data area may store information needed to execute the control method of the ice storage air conditioner in the above embodiment. data, etc. In addition, memory 1210 may include high-speed random access memory 1210 and may also include non-transitory memory 1210, such as at least one magnetic disk storage device, flash memory device, or other non-transitory solid-state storage device. It should be noted that the memory 1210 optionally includes memories 1210 that are remotely located relative to the processor 1220, and these remote memories 1210 can be connected to the terminal through a network. Examples of the above-mentioned networks include but are not limited to the Internet, intranets, local area networks, mobile communication networks and combinations thereof.

The non-transient software programs and instructions required to implement the control method of the ice storage air conditioner in the above embodiment are stored in the memory. When executed by one or more processors, the control method of the ice storage air conditioner in the above embodiment is executed. , for example, perform the method steps S100 to S400 in Figure 3 described above, the method step S110 in Figure 4 , the method step S410 in Figure 5 , the method step S420 in Figure 6 , the method steps S411 to S411 in Figure 7 Step S412, method step S413 in Figure 8, method steps S414 to step S415 in Figure 9, method step S416 in Figure 10, and method steps S417 to step S418 in Figure 11.

A fourth embodiment of the present application provides an air conditioner. The air conditioner includes the operation control device 120 provided in the third embodiment. Therefore, when the operating time of the air conditioner reaches the preset first time when the first control valve is closed and the second control valve is closed, it can be considered that the air conditioner has been running stably. At this time, the water tank temperature is obtained, and the water tank temperature and the preset time can be compared. water temperature threshold for comparison. If the water tank temperature is greater than or equal to the water temperature threshold, it means that the current air conditioner requires a large amount of cooling capacity to cool the water tank. Therefore, the air conditioner controls the second control valve to open, causing the liquid storage tank to release refrigerant and flow into the evaporator, thereby improving the refrigerant circulation per unit time. The amount of refrigerant flowing through the evaporator increases, improving the cooling effect and shortening the ice storage time. When the duration of opening the second control valve reaches the preset second duration, it can be considered that the liquid storage tank has released a sufficient amount of refrigerant, and the amount of refrigerant circulation in the air conditioner is sufficient. At this time, the air conditioner obtains the return air temperature and evaporation temperature, and uses the return air temperature to obtain the return air temperature and evaporation temperature. The gas temperature and evaporation temperature are used to determine the current circulating refrigerant amount, thereby controlling the first control valve and the second control valve so that the liquid storage tank continues to release refrigerant or recover refrigerant, adjust the current circulating refrigerant amount, improve heat exchange efficiency, and speed up ice storage. .

The fifth aspect embodiment of the present application provides a computer-readable storage medium. The computer-readable storage medium stores a computer-readable storage medium. The computer executable instructions can be used to cause the computer to execute the control method of the ice storage air conditioner in the second embodiment as above, for example, execute the method steps S100 to S400 in FIG. 3 described above, and the steps in FIG. 4 Method step S110, method step S410 in Figure 5, method step S420 in Figure 6, method step S411 to step S412 in Figure 7, method step S413 in Figure 8, method step S414 to step S415 in Figure 9, Method step S416 in FIG. 10 and method steps S417 to S418 in FIG. 11 .

Those of ordinary skill in the art can understand that all or some steps and systems in the methods disclosed above can be implemented as software, firmware, hardware, and appropriate combinations thereof. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, a digital signal processor, or a microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit . Such software may be distributed on computer-readable media, which may include computer storage media or non-transitory media and communication media or transitory media. As is known to those of ordinary skill in the art, the term computer storage media includes volatile and nonvolatile media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, Removable and non-removable media. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, Digital Versatile Disk, DVD or other optical disk storage, magnetic cassettes, magnetic tape, disk storage or other magnetic storage devices, or may be used Any other medium that stores the desired information and can be accessed by a computer. Additionally, it is known to those of ordinary skill in the art that communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media .

The embodiments of the present application have been described in detail above in conjunction with the accompanying drawings. However, the present application is not limited to the above-mentioned embodiments. Various changes can be made within the knowledge scope of those of ordinary skill in the technical field without departing from the purpose of the present application. .

Claims

An ice storage air conditioner, including:

water tank;

The cold storage module includes an evaporator, a compressor and a throttling assembly that are connected in sequence, wherein the evaporator is located inside the water tank, the throttling assembly includes a first end and a second end, and a useful In addition to the first temperature sensor for detecting the temperature of the water tank, a second temperature sensor for detecting the return air temperature is provided in the compressor, and a third temperature sensor for detecting the evaporation temperature is provided on the surface of the evaporator;

A rapid ice storage device includes a first control valve, a second control valve and a liquid storage tank. The liquid storage tank includes an inlet end and an outlet end. The inlet end is connected to the first end through the first control valve. , the outlet end is connected to the second end through the second control valve; and

A control component is respectively connected to the first temperature sensor, the second temperature sensor, the third temperature sensor, the first control valve and the second control valve.
The ice storage air conditioner according to claim 1, wherein the rapid ice storage device further includes an auxiliary throttle, and the auxiliary throttle is connected in parallel with the throttling assembly.
The ice storage air conditioner according to claim 2, wherein one end of the auxiliary throttle is connected to the inlet end through the first control valve, and the other end is connected to the second end through the second control valve. Connected.
A control method for ice storage air conditioners, applied to the ice storage air conditioner according to any one of claims 1 to 3, the control method includes:

When the first control valve and the second control valve are both in a closed state and the ice storage air conditioner operates for a preset first duration, obtain the water tank temperature;

When the water tank temperature is greater than or equal to the preset water temperature threshold, the second control valve is opened to cause the liquid storage tank to release refrigerant;

When the opening time of the second control valve reaches a preset second time, obtain the return air temperature and the evaporation temperature; and

According to the return air temperature and the evaporation temperature, the first control valve and the second control valve are controlled to adjust the amount of refrigerant circulating in the ice storage air conditioner and accelerate the ice storage speed.
The control method according to claim 4, wherein when the water tank temperature is less than a preset water temperature threshold, the first control valve and the second control valve are maintained in a closed state.
The control method according to claim 4, wherein controlling the first control valve and the second control valve according to the return air temperature and the evaporation temperature includes:

When the difference between the return air temperature and the evaporation temperature is less than or equal to the preset first refrigeration threshold, the second control valve is closed.
The control method according to claim 4, wherein controlling the first control valve and the second control valve according to the return air temperature and the evaporation temperature includes:

When the difference between the return air temperature and the evaporation temperature is greater than the preset first refrigeration threshold, the second control valve is maintained in the open state until the return air temperature is reacquired and the evaporation temperature is reacquired. The difference between them is less than or equal to the preset first cooling threshold.
The control method according to claim 6, after closing the second control valve, includes:

When the closing time of the second control valve reaches the preset third time, a new return air temperature and a new evaporation temperature are obtained again; as well as

When the difference between the new return air temperature and the new evaporation temperature is less than or equal to the preset second refrigeration threshold, the first control valve is opened.
The control method according to claim 8, wherein when the closing time of the second control valve reaches a preset third time, after reacquiring a new return air temperature and a new evaporation temperature, the method includes:

When the difference between the new return air temperature and the new evaporation temperature is greater than the preset second refrigeration threshold, the second control valve is maintained in a closed state until the reacquired return air temperature and the reacquired The difference between the evaporation temperatures is less than or equal to the preset second cooling threshold.
The control method according to claim 8, wherein after opening the first control valve, the method includes:

When the opening time of the first control valve reaches the preset fourth time, a new return air temperature and a new evaporation temperature are obtained again; and

When the difference between the new return air temperature and the new evaporation temperature is greater than or equal to the preset third refrigeration threshold, the first control valve is closed.
The control method according to claim 10, wherein when the opening time of the first control valve reaches a preset fourth time, after reacquiring a new return air temperature and a new evaporation temperature, the method further includes:

When the difference between the new return air temperature and the new evaporation temperature is less than the preset third refrigeration threshold, the first control valve is maintained in the open state until the reacquired return air temperature and the reacquired The difference between the evaporation temperatures is greater than or equal to the preset third cooling threshold.
The control method according to claim 10, wherein after closing the first control valve, the method includes:

When the closing time of the first control valve reaches the preset fifth time, a new water tank temperature is obtained again; and

When the new water tank temperature is less than or equal to the preset ice storage temperature, the ice storage air conditioner is controlled to stop running.
An operation control device, including a memory, a processor and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, any of claims 4 to 12 is implemented. The control method described in one item.
An air conditioner, including the operation control device according to claim 13.
A computer-readable storage medium stores computer-executable instructions, wherein the computer-executable instructions are used to cause a computer to execute the control method according to any one of claims 4 to 12.
A rapid ice storage device applied to ice storage air conditioners, wherein the ice storage air conditioner includes a water tank, an evaporator, a compressor and a throttling assembly that are connected in sequence, and the throttling assembly includes a first end and a second end, The evaporator is located inside the water tank, and the rapid ice storage device includes:

The liquid storage tank, including the inlet end and the outlet end, is used to store refrigerant;

A first control valve for connecting with the first end, and the first control valve is connected with the inlet end;

A second control valve is used to connect with the second end, and the second control valve is connected with the outlet end.