Energy storage type refrigerating device

Abstract

The utility model discloses an energy storage type refrigerating device which comprises a refrigerating device main machine arranged in a shell and further comprises a cold storage box and a heat exchanger which are arranged in the shell. The heat exchanger is provided with two groups of runners, a cold transfer box is arranged in the cold storage box (3) and stores water, and the cold transfer box is internally provided with a heat exchange tube and is filled with a phase change material surrounding the heat exchange tube; the refrigerating device main machine is directly connected with one end of a first set of flow channels of the heat exchanger through a first medium transmission pipe and further connected with one end of a heat exchange pipe through a second medium transmission pipe, and the other end of the heat exchange pipe is connected with one end of the first set of flow channels of the heat exchanger through a third medium transmission pipe. The other end of the first group of flow channels of the heat exchanger outputs a refrigerating medium outwards; the cold storage box and the second channel in the heat exchanger form a water circulation loop through the cold water inlet pipe, the cold water outlet pipe and the water pump. According to the utility model, through reasonable distribution of four working conditions, the best use effect is achieved, and the energy consumption is reduced.

Description

Technical Field

[0001] The utility model relates to the field of refrigeration devices, in particular to an energy storage refrigeration device. Background Art

[0002] Some buildings and factories require refrigeration systems to cool the interior. Conventional refrigeration systems operate continuously to release cold air to achieve the desired effect. This is especially true in summer, when daytime temperatures are high and demand for cooling is high. Consequently, peak electricity consumption is high. Peak electricity costs, whether for industrial or residential use, are high, often twice or even higher than off-peak electricity. This creates a high energy cost for cooling the interior of buildings and factories. Therefore, the inventors have designed an energy storage refrigeration system that cools water during off-peak periods to reduce its temperature and store it for use during peak periods. Utility Model Content

[0003] The utility model provides an energy storage refrigeration device to solve the problem of excessive energy consumption caused by the need for continuous refrigeration work in the prior art refrigeration devices.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the present utility model is:

[0005] An energy storage refrigeration device comprises a refrigeration device main unit (2) inside a housing (1), the refrigeration device main unit (2) being used for outputting a refrigeration medium, and further comprising a cold storage box (3) and a heat exchanger (4) arranged inside the housing (1); the heat exchanger (4) having two groups of flow channels, wherein the first group of flow channels is used for allowing the refrigeration medium to pass through, and the second group of flow channels is used for allowing water to pass through, and the refrigeration medium in the first group of flow channels and the water in the second group of flow channels form heat exchange through the heat exchanger (4); a cold transfer box (301) is provided inside the cold storage box (3), a heat exchange tube (302) is provided inside the cold transfer box (301) and is filled with a phase change material surrounding the heat exchange tube (302), and water is stored inside the cold storage box (3);

[0006] The refrigerant medium outlet of the refrigeration device main unit (2) is connected to a first medium transmission pipe (5) with a solenoid valve and a second medium transmission pipe (6) with a solenoid valve, wherein the first medium transmission pipe (5) is directly connected to one end of the first group of flow channels of the heat exchanger (4), the second medium transmission pipe (6) is connected to one end of the heat exchange pipe (302), the other end of the heat exchange pipe (302) is connected to one end of the first group of flow channels of the heat exchanger (4) through a third medium transmission pipe (7) with a solenoid valve, and the other end of the first group of flow channels of the heat exchanger (4) outputs the refrigerant medium to the outside through a fourth medium transmission pipe (12);

[0007] The cold storage tank (3) is connected to the second group of channels in the heat exchanger (4) via a cold water inlet pipe (9), a cold water outlet pipe (10), and a water pump (11) to form a water circulation loop.

[0008] Furthermore, the heat exchange tube (302) is spiral.

[0009] Furthermore, the wall of the cold storage box (3) is provided with a heat-insulating layer.

[0010] Furthermore, a temperature sensor is provided on the fourth medium transmission pipe (12).

[0011] Furthermore, the heat exchanger (4) is a plate heat exchanger having two flow channels.

[0012] Furthermore, the cold storage box (3) is also equipped with a water stirring mechanism, and the water inside the cold storage box (3) is stirred by the water flow mechanism.

[0013] Compared with the prior art, the advantages of this utility model are:

[0014] (1) The utility model can realize the reasonable allocation of four working conditions: refrigeration energy storage, single energy storage refrigeration, refrigeration energy storage combined refrigeration, and host direct cooling, so as to achieve the best use effect and reduce energy consumption.

[0015] (2) The utility model transmits the refrigerant medium to the heat exchange tube of the cold transfer box through the second medium transmission pipe, and stores the low temperature generated by the refrigerant medium through the phase change material in the cold transfer box. The phase change material will be transferred to the water in the cold storage box to cool the water. The water can be cooled and stored at the low power consumption period, and then the cold water in the cold storage box can be circulated and transported to the heat exchanger at the peak power consumption period to realize the cooling effect of the refrigerant medium, so as to achieve the effect of reducing energy consumption.

[0016] (3) The energy storage refrigeration device in the embodiment of the present invention has a spiral structure of the heat exchange tube. By extending the length of the heat exchange tube in the cold transfer box, the heat exchange time between the refrigerant medium and the phase change material in the heat exchange tube is increased, thereby improving the refrigeration effect of the phase change material. An insulation layer is provided on the outer wall of the cold storage box. The insulation layer can reduce the heat exchange efficiency between the cold water in the cold storage box and the outside world, thereby ensuring the temperature of the cold water. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The figure is a schematic diagram of the overall structure of an energy storage refrigeration device of the present utility model.

[0018] Figure 2 The utility model is a schematic diagram of the internal structure of a cold storage box of an energy storage refrigeration device.

[0019] Figure 3This is a system block diagram of an energy storage refrigeration device of the present utility model.

[0020] In the figure: 1. Casing; 2. Refrigeration unit main unit; 3. Cold storage box; 301. Cold transfer box; 302. Heat exchange tube; 4. Heat exchanger; 5. First medium transmission tube; 6. Second medium transmission tube; 7. Third medium transmission tube; 8. Solenoid valve; 9. Cold water inlet tube; 10. Cold water outlet tube; 11. Water pump; 12. Fourth medium transmission tube. DETAILED DESCRIPTION

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] See also Figure 1-3 This embodiment provides an energy storage refrigeration device, including a housing 1, within which a refrigeration device main unit 2 is disposed. The refrigeration device main unit 2 is used to cool a refrigerant and output the refrigerant. A cold storage tank 3 and a heat exchanger 4 are also disposed within the housing 1, wherein:

[0023] The heat exchanger 4 has two groups of flow channels, wherein the first group of flow channels is for the refrigerant to pass through, and the second group of flow channels is for water channels. The refrigerant in the first group of flow channels and the water in the second group of flow channels form heat exchange through the heat exchanger 4.

[0024] A cold transfer box 301 is provided inside the cold storage box 3, and a heat exchange tube 302 is provided inside the cold transfer box 301. Both ends of the heat exchange tube 302 extend to the outside of the cold storage box 3. The cold transfer box 301 is filled with a phase change material surrounding the heat exchange tube 302. Water is stored inside the cold storage box 3, and the water completely submerges the cold transfer box 301.

[0025] The refrigerant outlet of the refrigeration unit 2 is connected to a first medium transmission pipe 5 with a solenoid valve. This first medium transmission pipe 5 is directly connected to one end of the first set of flow channels in the first heat exchanger 4. The refrigerant outlet of the refrigeration unit 2 is also connected to a second medium transmission pipe 6 with a solenoid valve. This second medium transmission pipe 6 is connected to one end of the heat exchange tube 302. The other end of the heat exchange tube 302 is connected to one end of the first set of flow channels in the heat exchanger 4 via a third medium transmission pipe 7 with a solenoid valve 8. The other end of the first set of flow channels in the heat exchanger 4 outputs the refrigerant to the outside through a fourth medium transmission pipe 12 for heat exchange with the air. Taking the external air outlet device as an example, another heat exchanger is provided inside the air outlet device. The other end of the first set of flow channels in the heat exchanger 4 in this embodiment is connected to one end of the heat exchanger of the air outlet device via a fourth medium transmission pipe 12. The other end of the heat exchanger of the air outlet device is then connected to the main unit of the refrigeration device of this embodiment via a circulation pipe. Thus, the refrigerant medium enters the heat exchanger of the air outlet device and can form a heat exchange with the air outlet of the air outlet device. The refrigerant medium is ultimately returned to the main unit of the refrigeration device 2 through the circulation pipe, thereby forming a refrigerant medium circulation loop. In this embodiment, the main unit of the refrigeration device 2 and the air outlet device are conventional technologies and will not be described in detail here.

[0026] The cold storage tank 3 is connected to both ends of the second group of flow channels in the heat exchanger 4 through a cold water inlet pipe 9 and a cold water outlet pipe 10, and a water pump 11 is provided on the cold water inlet pipe 9, thereby forming a water circulation loop.

[0027] Specifically, the energy storage refrigeration device cools the refrigerant medium through the operation of the refrigeration device main unit 2, and then transports the refrigerant medium to the heat exchange tube 302 through the second medium transmission pipe 6. The low temperature generated by the refrigerant medium is stored by the phase change material in the cold transfer box 301. The phase change material will be transferred to the water in the cold storage box 3 to cool the water. Then the refrigerant medium in the heat exchange tube 302 is transported to the heat exchanger 4 and transported to the air outlet device through the fourth medium transmission pipe 12 to exchange heat with the wind. When the refrigeration device main unit 2 is not working or working with reduced efficiency, the cold water in the cold storage box 3 is circulated and transported to the heat exchanger 4 to realize the cooling effect of the refrigerant medium, thereby achieving the effect of reducing energy.

[0028] In a preferred example of the present application, the heat exchanger 4 is preferably a plate heat exchanger with two groups of flow channels, the first group of flow channels of the heat exchanger 4 has a medium inlet and a medium outlet, the second group of flow channels of the heat exchanger 4 has a cold water inlet and a cold water outlet, the first medium transmission pipe 5 and the second medium transmission pipe 6 are respectively connected to the medium inlet of the first group of flow channels, the fourth medium transmission pipe 12 is connected to the medium outlet of the first group of flow channels, the cold water inlet pipe 9 is connected to the cold water inlet of the second group of flow channels, and the cold water outlet pipe 10 is connected to the cold water outlet of the second group of flow channels.

[0029] Secondly, in this embodiment, solenoid valves 8 are provided on the first medium transmission pipe 5, the second medium transmission pipe 6 and the third medium transmission pipe 7. Through the different working states of the three transmission pipes 5, four working conditions of the energy storage refrigeration device are realized, namely, refrigeration energy storage, single energy storage refrigeration, refrigeration energy storage combined refrigeration and direct cooling of the main unit. The energy storage refrigeration device achieves the best use effect and reduces energy consumption through the reasonable allocation of the four working conditions. Furthermore, a temperature sensor is provided on the fourth medium transmission pipe 12. The energy storage refrigeration device operates in single energy storage refrigeration and refrigeration energy storage combined refrigeration working conditions, and the temperature sensor detects the temperature of the refrigerant in the fourth medium transmission pipe 12 to control the switching.

[0030] The following are the four operating conditions of the energy storage refrigeration device:

[0031] 1. Refrigeration energy storage: During peak electricity consumption, the cold storage tank 3 needs to be stored cold. At this time, the solenoid valve 8 on the first medium transmission pipe 5 is closed, and the solenoid valves 8 on the second medium transmission pipe 6 and the third medium transmission pipe 7 are opened. After the refrigeration device main unit 2 cools the refrigerant, it is transported to the heat exchange pipe 302 through the second medium transmission pipe 6 for cold storage. The refrigerant is then transported to the heat exchanger 4 through the third medium transmission pipe 7 and then to the air outlet device through the fourth medium transmission pipe 12.

[0032] 2. Single energy storage refrigeration: During the low-peak period of electricity consumption, the refrigeration device main unit 2 stops refrigeration (the cooling medium will still circulate). At this time, the solenoid valve 8 on the first medium transmission pipe 5 is opened, and the solenoid valve 8 on the second medium transmission pipe 6 and the third medium transmission pipe 7 is closed. The cooling medium will not enter the cold storage tank 3, but will be directly transported to the heat exchanger 4. At this time, the cold water in the cold storage tank 3 is circulated to the heat exchanger 4 through the water pump 11, and heat exchange is formed with the refrigerant in the heat exchanger 4, thereby achieving the purpose of cooling the refrigerant. The refrigerant is then transported to the air outlet device through the fourth medium transmission pipe 12.

[0033] 3. Refrigeration and energy storage combined refrigeration: When operating in single energy storage refrigeration mode, the temperature of the refrigerant medium in the fourth medium transmission pipe 12 is detected by a temperature sensor. When the temperature of the refrigerant medium does not meet the requirement, the solenoid valve 8 on the first medium transmission pipe 5 is opened, and the solenoid valves 8 on the second medium transmission pipe 6 and the third medium transmission pipe 7 are closed. The refrigeration device main unit 2 works for cooling, and the water pump 11 continues to work to circulate the cold water in the cold storage tank 3 to the heat exchanger 4 to ensure that the temperature of the refrigerant medium meets the use requirements.

[0034] 4. Direct cooling by the main unit: When cold storage is not required, the main unit 2 of the refrigeration device works for cooling, the solenoid valves 8 on the second medium transmission pipe 6 and the third medium transmission pipe 7 are closed, and the solenoid valve 8 on the first medium transmission pipe 5 is opened. The refrigerant medium is directly transported to the heat exchanger 4 through the first medium transmission pipe 5, and then transported to the air outlet device through the fourth medium transmission pipe 12.

[0035] In a preferred example of the present application, an insulation layer is provided on the outer wall of the cold storage box 3, and the insulation layer is made of glass fiber cotton, mesh cloth, phenolic foam, etc. The insulation layer is provided to reduce the heat exchange efficiency of the cold water in the cold storage box 3 and ensure the temperature of the cold water in the cold storage box 3; the cold transfer box 301 is made of cold transfer material to ensure rapid heat exchange between the phase change material in the cold transfer box 301 and the cold water in the cold storage box 3; a water stirring mechanism is also provided in the cold storage box 3, and the water stirring mechanism is a stirring blade driven by a motor, etc., which can stir the water in the cold storage box 3 to make the water in the cold storage box 3 evenly exchange heat. Of course, in other embodiments, the water stirring mechanism can also be other mechanisms with water flow stirring function.

[0036] In a preferred example of the present application, the heat exchange tube 302 has a spiral structure. By extending the length of the heat exchange tube 302 in the cold transfer box 301, the heat exchange time between the refrigerant medium and the phase change material in the heat exchange tube 302 is increased, thereby improving the cooling effect of the phase change material. In other embodiments, the heat exchange tube 302 can also be a continuous S-shaped structure.

[0037] The control mode of the present invention is controlled by a controller, and the control program of the controller can be realized by simple programming by those skilled in the art, so the present invention will not further explain the control mode and circuit connection in detail.

[0038] The preferred embodiments of the present invention are described in detail above with reference to the accompanying drawings. The embodiments described in the present invention are merely descriptions of the preferred embodiments of the present invention and do not limit the concept and scope of the present invention. The various specific technical features described in the above specific embodiments can be combined in any suitable manner unless there is any contradiction. Such combinations, as long as they do not violate the concept of the present invention, should also be regarded as the contents disclosed in the present disclosure. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0039] The present invention is not limited to the specific details in the above-mentioned embodiments. Within the technical concept of the present invention and without departing from the design concept of the present invention, various modifications and improvements made to the technical solution of the present invention by those skilled in the art should fall within the protection scope of the present invention. The technical contents for which protection is sought in the present invention have all been recorded in the claims.

Claims

1. An energy storage refrigeration device, comprising a refrigeration device main unit (2) inside a housing (1), wherein the refrigeration device main unit (2) is used to output a refrigeration medium, and is characterized in that: It also includes a cold storage box (3) and a heat exchanger (4) arranged inside the shell (1); the heat exchanger (4) has two groups of flow channels, wherein the first group of flow channels is used for allowing the refrigerant medium to pass through, and the second group of flow channels is used for allowing water to pass through, and the refrigerant in the first group of flow channels and the water in the second group of flow channels form heat exchange through the heat exchanger (4); a cold transfer box (301) is provided inside the cold storage box (3), a heat exchange tube (302) is provided inside the cold transfer box (301) and is filled with a phase change material surrounding the heat exchange tube (302), and water is stored inside the cold storage box (3); The refrigerant medium outlet of the refrigeration device main unit (2) is connected to a first medium transmission pipe (5) with a solenoid valve and a second medium transmission pipe (6) with a solenoid valve, wherein the first medium transmission pipe (5) is directly connected to one end of the first group of flow channels of the heat exchanger (4), the second medium transmission pipe (6) is connected to one end of the heat exchange pipe (302), the other end of the heat exchange pipe (302) is connected to one end of the first group of flow channels of the heat exchanger (4) through a third medium transmission pipe (7) with a solenoid valve, and the other end of the first group of flow channels of the heat exchanger (4) outputs the refrigerant medium to the outside through a fourth medium transmission pipe (12); The cold storage tank (3) is connected to the second group of channels in the heat exchanger (4) via a cold water inlet pipe (9), a cold water outlet pipe (10), and a water pump (11) to form a water circulation loop.

2. The energy storage refrigeration device according to claim 1, characterized in that: The heat exchange tube (302) is spiral-shaped.

3. The energy storage refrigeration device according to claim 1, characterized in that: The wall of the cold storage box (3) is provided with a heat-insulating layer.

4. The energy storage refrigeration device according to claim 1, characterized in that: The fourth medium transmission pipe (12) is provided with a temperature sensor.

5. The energy storage refrigeration device according to claim 1, characterized in that: The heat exchanger (4) is a plate heat exchanger having two flow channels.

6. The energy storage refrigeration device according to claim 1, characterized in that: The cold storage box (3) is also equipped with a water stirring mechanism, and the water inside the cold storage box (3) is stirred by the water flow mechanism.

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