Cold storage device

Abstract

The utility model belongs to the technical field of refrigeration, and particularly relates to a cold storage device which comprises a refrigeration device and a cold storage water tank, an air outlet and an air return port are formed in one side of the cold storage water tank, a water outlet and a water return port are formed in the other side of the cold storage water tank, an air outlet valve is installed at the air outlet, an air return valve is installed at the air return port, and the air outlet valve communicates with a cold air user side through an air outlet pipeline. The air return valve is communicated with the cold air user side through an air return pipeline, the water outlet is communicated with the ice water user side through a water outlet pipeline, and the water return port is communicated with the ice water user side through a water return pipeline; and the heat exchange device is arranged in the cold storage water tank, a heat exchange channel is designed in the heat exchange device, a refrigerant inlet is formed in one end, where the heat exchange device is located, of the heat exchange channel, and a refrigerant outlet is formed in the other end, where the heat exchange device is located, of the heat exchange channel. The device can accumulate cold by making ice or making cold water during the off-peak period of power utilization, and release cold water and cold air to users during the peak period of power utilization, so that off-peak power utilization is realized, and the power utilization cost is effectively reduced.

Description

Technical Field

[0001] The present application belongs to the field of refrigeration technology, and in particular relates to a cold storage device. Background Art

[0002] The current air conditioning energy storage technology refrigeration simply turns water into ice or low-temperature cold water. If the air in the user's cold room is to be cooled, secondary heat exchange is required with the help of a plate heat exchanger and an evaporator in the cold room, which not only increases equipment investment but also reduces heat exchange efficiency. For the ice water required by industries such as dairy products and pre-prepared dishes, the existing plate heat exchangers or shell and tube heat exchangers cannot meet the requirements. If the evaporation temperature is lower than -3°C, the produced ice water is at risk of freezing. There is an urgent need for a multifunctional refrigeration device that can provide both low-temperature cold water storage and cold air. Summary of the invention

[0003] The embodiment of the present application provides a cold storage device, which can store cold by making ice or cold water during the period of low electricity consumption, and release cold water and cold air to users during the period of peak electricity consumption, thereby achieving peak electricity consumption and effectively reducing electricity costs.

[0004] A cold storage device, comprising:

[0005] Refrigeration equipment;

[0006] A cold water storage tank, wherein an air outlet and an air return port are provided at the top of one side of the cold water storage tank, and a water outlet and a water return port are provided at the bottom of the other side of the cold water storage tank, an air outlet valve is installed at the air outlet, and a return air valve is installed at the return air outlet, the air outlet valve is connected to the cold air user end through an air outlet duct, the air outlet valve is connected to the cold air user end through a return air duct, the water outlet is connected to the ice water user end through a water outlet duct, and the water return port is connected to the ice water user end through a return water duct;

[0007] A heat exchange device, wherein the heat exchange device is arranged inside the cold storage water tank, and the heat exchange device has a heat exchange channel inside. The heat exchange channel forms a refrigerant inlet at one end of the heat exchange device, and the heat exchange channel forms a refrigerant outlet at the other end of the heat exchange device. The refrigerant inlet is connected to the refrigeration device through a refrigerant exhaust pipe, and the refrigerant outlet is connected to the refrigeration device through a refrigerant return pipe.

[0008] According to some other embodiments of the cold storage device of the present utility model, a plurality of the heat exchange devices are provided, each of the heat exchange devices is installed side by side and at intervals inside the cold storage water tank, the refrigerant inlet on each of the heat exchange devices is connected to the refrigerant exhaust pipe through a liquid separation device, and the refrigerant outlet on each of the heat exchange devices is connected to the refrigerant return pipe through an air collecting device.

[0009] According to the cold storage device of some other embodiments of the present utility model, the heat exchange device is a bent structure.

[0010] According to some other embodiments of the cold storage device of the present invention, the refrigeration device includes a refrigeration compressor and a condenser, the refrigeration compressor is connected to the refrigerant exhaust pipe and the refrigerant return pipe, and the condenser is installed on the refrigerant exhaust pipe and is connected to the refrigeration compressor through the refrigerant exhaust pipe.

[0011] According to some other embodiments of the cold storage device of the present invention, the refrigeration device further includes a liquid accumulator, which is installed on the refrigerant exhaust pipe and is used to store refrigerant.

[0012] According to some other embodiments of the cold storage device of the present utility model, a solenoid valve is installed on the refrigerant exhaust pipe.

[0013] According to some other embodiments of the cold storage device of the present utility model, an expansion valve is installed on the refrigerant exhaust pipe, and the expansion valve is located between the solenoid valve and the liquid separation device.

[0014] According to the cold storage device of some other embodiments of the present utility model, a circulating fan is installed on the return air duct.

[0015] According to the cold storage device of some other embodiments of the utility model, a circulating water pump is installed on the water outlet pipe, a water outlet control valve is installed on the water outlet pipe, and a return water control valve is installed on the return water pipe.

[0016] According to the cold storage device of some other embodiments of the present utility model, the outside of the cold storage water tank is wrapped with a thermal insulation material.

[0017] The cold storage device of the embodiment of the utility model has at least the following beneficial effects: when the ice water user end needs to provide ice water, but the cold air user end does not need temperature control, the present application adopts wet operation, the cold storage water tank is filled with water, the air outlet valve and the air return valve on the top of the cold storage water tank are closed, the refrigeration device performs refrigeration, and the refrigerant flows through the heat exchange device to exchange heat with the water inside the cold storage water tank, so that the water in the cold storage water tank becomes cold, thereby providing ice water for the ice water user end, and the water flow after heating up at the ice water user end enters the cold storage water tank again for cooling, and the cycle is repeated. When the ice water user end does not need to provide ice water, but the cold air user end needs temperature control, the present application adopts dry operation, the refrigeration device performs refrigeration, ice is made in the cold storage water tank, and the air in the cold storage water tank becomes cold by melting ice, thereby providing cold air for the cold air user end, and the air flow after heating up at the cold air user end enters the cold storage water tank again for cooling, and the cycle is repeated. When the ice water user end needs to be provided with ice water, and the cold air user end also needs to be provided with cold air, the present application adopts dry-wet mixed operation. At this time, a part of the water in the cold storage water tank is discharged so that the liquid level in the cold storage water tank is lower than the air outlet valve and the return air valve. The refrigeration device performs refrigeration, and the refrigerant flows through the heat exchange device to exchange heat with the water inside the cold storage water tank. At this time, the cold air in the cold storage water tank can be supplied to the cold air user end through the air outlet valve and the return air valve, and the ice water will be supplied to the ice water user end. Therefore, the present application can realize the multifunctional supply of cold air and cold water at the same time, and the structure is simpler and the cold storage cost is lower. When the power grid is in a low power consumption valley, the present application uses a refrigeration device to make water into ice or low-temperature cold water, and stores it in a cold storage water tank. When the power consumption is peak, ice water, low-temperature cold water and cold air are provided by melting ice and releasing cold, realizing the "peak shifting and valley filling" of electricity, which can reduce the daily operating costs of users and save costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of a cold storage device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work should fall within the scope of protection of the present application.

[0020] The following is a further detailed description of the implementation of the present application in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present application but cannot be used to limit the scope of the present application.

[0021] In the description of the embodiments of the present application, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0022] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0023] In the embodiments of the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" and "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0024] In recent years, with the serious homogeneous competition in various industries, the profit margin of enterprises has declined. At present, all industries hope to maintain the profit requirements of enterprises by reducing daily operating expenses. Many places in the country implement the peak-valley time-of-use electricity price system, which is an electricity price system that calculates electricity charges according to peak electricity consumption and valley electricity consumption. Peak electricity consumption generally refers to electricity consumption when the electricity users are concentrated and the power supply is tight, such as during peak hours, the charging standard is higher; valley electricity consumption generally refers to electricity consumption when there are fewer electricity users and the power supply is sufficient, such as during valley hours, the charging standard is lower. The implementation of peak-valley electricity prices is conducive to promoting electricity users to stagger electricity consumption time and make full use of equipment and energy. For the air-conditioning and food freezing and refrigeration industries, refrigeration equipment belongs to the power consumption load center. During the valley period, ice is made or cold water is produced to store cold, and then cold water and cold air are released to users during peak electricity consumption, thereby effectively reducing the operating expenses of the enterprise.

[0025] The current air conditioning energy storage technology refrigeration simply turns water into ice or low-temperature cold water. If the air in the user's cold room is to be cooled, it is necessary to use a plate heat exchanger and an evaporator in the cold room for secondary heat exchange, which not only increases equipment investment but also reduces heat exchange efficiency. For the ice water required by the dairy products, pre-prepared food and other industries, the existing plate heat exchanger or shell and tube heat exchanger cannot meet the requirements. If the evaporation temperature is lower than -3°C, the produced ice water is at risk of freezing. There is an urgent need for a multifunctional refrigeration device that can provide both low-temperature cold water storage and cold air. Figure 1 The present application provides a cold storage device, including a refrigeration device, a cold storage water tank 7 and a heat exchange device 8. An air outlet and an air return port are provided at the top of one side of the cold storage water tank 7, and a water outlet and a water return port are provided at the bottom of the other side of the cold storage water tank 7. An air outlet valve 14 is installed at the air outlet, and a return air valve 15 is installed at the return air port. The air outlet valve 14 is connected to the cold air user end 13 through an air outlet duct, and the return air valve 15 is connected to the cold air user end 13 through a return air duct. The water outlet is connected to the ice water user end 11 through the water outlet duct, and the water return port is connected to the ice water user end 11 through the return water duct. The heat exchange device 8 is arranged inside the cold storage water tank 7, and a heat exchange channel is provided inside the heat exchange device 8. The heat exchange channel forms a refrigerant inlet at one end of the heat exchange device 8, and the heat exchange channel forms a refrigerant outlet at the other end of the heat exchange device 8. The refrigerant inlet is connected to the refrigeration device through a refrigerant exhaust pipe, and the refrigerant outlet is connected to the refrigeration device through a refrigerant return pipe.

[0026] When the ice water user end 11 needs to provide ice water, and the cold air user end 13 does not need temperature control, the present application adopts wet operation, the cold water tank 7 is filled with water, the air outlet valve 14 and the return air valve 15 on the top of the cold water tank 7 are closed, the refrigeration device performs refrigeration, and the refrigerant flows through the heat exchange device 8 to exchange heat with the water inside the cold water tank 7, so that the water in the cold water tank 7 becomes cold, thereby providing ice water for the ice water user end 11, and the water flow after heating up through the ice water user end 11 enters the cold water tank 7 again for cooling, and the cycle is repeated. When the ice water user end 11 does not need to provide ice water, and the cold air user end 13 needs temperature control, the present application is dry operation, the refrigeration device performs refrigeration, ice is made in the cold water tank 7, and the air in the cold water tank 7 becomes cold by melting ice, thereby providing cold air for the cold air user end 13, and the air flow after heating up through the cold air user end 13 enters the cold water tank 7 again for cooling, and the cycle is repeated. When the ice water user end 11 needs to be provided with ice water, and the cold air user end 13 also needs to be provided with cold air, the present application adopts dry-wet mixed operation, discharges part of the water in the cold water tank 7, so that the liquid level in the cold water tank 7 is lower than the air outlet valve 14 and the return air valve 15, and the refrigeration device performs refrigeration, and the refrigerant flows through the heat exchange device 8 to exchange heat with the water inside the cold water tank 7. At this time, the cold air in the cold water tank 7 can be supplied to the cold air user end 13 through the air outlet valve 14 and the return air valve 15, and the ice water will be supplied to the ice water user end 11. Therefore, the present application can realize the multifunctional supply of cold air and cold water at the same time, and the structure is simpler and the equipment investment cost is lower. In the present application, when the power consumption of the power grid is low, the refrigeration device turns water into ice or low-temperature cold water, and stores it in the cold water storage tank 7. When the power consumption is peak, the ice is melted and the cold is released to provide ice water, low-temperature cold water and cold air, thereby realizing the "peak shifting and valley filling" of electricity, which can reduce the daily operating costs of users, save corporate expenses, increase corporate profit margins, reduce financial pressure, and enhance corporate competitiveness.

[0027] It should be noted that no matter whether it is wet operation, dry operation or mixed wet and dry operation, ice is first made during the off-peak period of electricity consumption, and then the ice is melted during the peak period of electricity consumption to provide ice water or cold air.

[0028] In some embodiments, each heat exchange device 8 is installed side by side and at intervals inside the cold storage water tank 7, the refrigerant inlet on each heat exchange device 8 is connected to the refrigerant exhaust pipe through the liquid separation device 6, and the refrigerant outlet on each heat exchange device 8 is connected to the refrigerant return pipe through the gas collecting device 9.

[0029] In order to prevent condensation and cold loss, in some embodiments, the outside of the cold storage water tank 7 is wrapped with insulation material.

[0030] In some embodiments, the heat exchange device 8 is a bent structure, which can increase the contact area between the heat exchange device 8 and the water in the cold storage water tank 7, thereby improving the heat exchange efficiency.

[0031] Specifically, the heat exchange device 8 is a plate bending structure, and a heat exchange channel for the circulation of refrigerant is provided inside the plate. The refrigerant flows in the heat exchange channel of the plate to evaporate and absorb heat, and water contacts the outer surfaces on both sides of the plate with the built-in heat exchange channel to cool down, thereby solving the problem that the existing equipment provides low-temperature ice water, but the evaporation temperature is not well controlled and it is easy to freeze.

[0032] In some embodiments, the refrigeration device includes a refrigeration compressor 1 and a condenser 2, the refrigeration compressor 1 is connected to a refrigerant exhaust pipe and a refrigerant return pipe, and the condenser 2 is installed on the refrigerant exhaust pipe and connected to the refrigeration compressor 1 through the refrigerant exhaust pipe.

[0033] In some embodiments, the refrigeration device further comprises a liquid accumulator 3, which is mounted on the refrigerant exhaust pipe and is used to store refrigerant. The liquid accumulator 3 replenishes refrigerant in the refrigerant exhaust pipe and the refrigerant return pipe to ensure sufficient refrigerant.

[0034] In some embodiments, a solenoid valve 4 is installed on the refrigerant exhaust pipe. The solenoid valve 4 is used to control the on-off of the refrigerant exhaust pipe.

[0035] In some embodiments, an expansion valve 5 is installed on the refrigerant exhaust pipe.

[0036] Specifically, the expansion valve 5 is located between the solenoid valve 4 and the liquid distributor 6, and the expansion valve 5 is used to control the flow rate of the refrigerant.

[0037] In some embodiments, a circulating fan 12 is installed on the return air duct. The circulating fan 12 is used to accelerate the airflow at the cold air user end to flow back to the cold storage water tank 7.

[0038] In some embodiments, a circulating water pump 10 is installed on the water outlet pipe. The circulating water pump 10 is used to accelerate the cold water in the cold storage water tank 7 to enter the ice water user end 11.

[0039] In some embodiments, a water outlet control valve 16 is installed on the water outlet pipe, and a water return control valve 17 is installed on the water return pipe.

[0040] The present application integrates multiple functions together, realizes one machine with multiple functions, reduces the number of required equipment, reduces installation space, can improve building utilization, and is conducive to reducing corporate building construction costs.

[0041] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

Claims

1. A cold storage device, characterized in that: include: Refrigeration equipment; A cold water storage tank, wherein an air outlet and an air return port are provided at the top of one side of the cold water storage tank, and a water outlet and a water return port are provided at the bottom of the other side of the cold water storage tank, an air outlet valve is installed at the air outlet, and a return air valve is installed at the return air outlet, the air outlet valve is connected to the cold air user end through an air outlet duct, the return air valve is connected to the cold air user end through a return air duct, the water outlet is connected to the ice water user end through a water outlet duct, and the water return port is connected to the ice water user end through a return water duct; A heat exchange device, wherein the heat exchange device is arranged inside the cold storage water tank, and a heat exchange channel is designed inside the heat exchange device, wherein the heat exchange channel forms a refrigerant inlet at one end of the heat exchange device, and the heat exchange channel forms a refrigerant outlet at the other end of the heat exchange device, the refrigerant inlet is connected to the refrigeration device through a refrigerant exhaust pipe, and the refrigerant outlet is connected to the refrigeration device through a refrigerant return pipe.

2. The cold storage device according to claim 1, characterized in that: There are multiple heat exchange devices, each of which is installed side by side and at intervals inside the cold storage water tank. The refrigerant inlet on each heat exchange device is connected to the refrigerant exhaust pipe through a liquid separator, and the refrigerant outlet on each heat exchange device is connected to the refrigerant return pipe through an air collecting device.

3. The cold storage device according to claim 2, characterized in that: The heat exchange device is a bent structure.

4. The cold storage device according to claim 1, characterized in that: The refrigeration device comprises a refrigeration compressor and a condenser. The refrigeration compressor is connected to the refrigerant exhaust pipe and the refrigerant return pipe. The condenser is installed on the refrigerant exhaust pipe and communicates with the refrigeration compressor through the refrigerant exhaust pipe.

5. The cold storage device according to claim 4, characterized in that: The refrigeration device further comprises a liquid accumulator, which is mounted on the refrigerant exhaust pipe and is used to store refrigerant.

6. The cold storage device according to claim 2, characterized in that: A solenoid valve is installed on the refrigerant exhaust pipe.

7. The cold storage device according to claim 6, characterized in that: An expansion valve is installed on the refrigerant exhaust pipe, and the expansion valve is located between the solenoid valve and the liquid separation device.

8. The cold storage device according to claim 1, characterized in that: A circulation fan is installed on the return air duct.

9. The cold storage device according to claim 1, characterized in that: A circulating water pump is installed on the water outlet pipe, a water outlet control valve is installed on the water outlet pipe, and a return water control valve is installed on the return water pipe.

10. The cold storage device according to claim 1, characterized in that: The outside of the cold storage water tank is wrapped with heat-insulating material.

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