Adjustable and controllable cross-seasonal soil cold storage and supply equipment

Abstract

The utility model discloses adjustable and controllable cross-seasonal soil cold storage and supply equipment which comprises a cold storage loop, the cold storage loop is connected with a cold supply loop through a circulating pipeline, and the cold storage loop and the cold supply loop are both electrically connected with a frequency conversion automatic control system. The thermal inertia of the soil is utilized, the natural cold energy is stored across time and space, the cold storage and supply temperature is accurately regulated and controlled, only a circulating pump consumes a small amount of electric energy, the cold energy in the atmosphere is continuously stored in underground soil in a cold season, a heat preservation tank is used as a connecting and buffering device, the cold storage and supply requirements within-40 DEG C are met, and the system is extremely low in energy consumption and low in cost. The operation cost is extremely low and the application range is wide.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of adjustable cross-season soil cold storage cooling equipment, and it is related to cold storage refrigeration field. BACKGROUND

[0002] With the development of human society, the application of refrigeration technology is also increasingly widespread, penetrating every field of people's production and life.

[0003] Food refrigeration, freezing and preservation; public building refrigeration system cooling in summer; special equipment cooling; computer room cooling; agricultural production cooling; precision production workshop cooling; industrial ice making, etc. The application scenarios are very wide, and the energy consumption is huge.

[0004] Most of the refrigeration technology used in society adopts high-energy-consuming refrigeration technology such as electric energy and heat energy to meet the cold demand of human society, and the equipment is expensive and the operation cost is high. UTILITY MODEL CONTENT

[0005] The utility model provides a kind of adjustable cross-season soil cold storage cooling equipment to overcome the defects of expensive refrigeration technology equipment, high energy consumption and high operation cost in the prior art.

[0006] In order to solve the above technical problems, the utility model provides the following technical scheme:

[0007] The utility model discloses a kind of adjustable cross-season soil cold storage cooling equipment, including cold storage loop, the cold storage loop is connected with cooling loop by circulation pipeline, both are electrically connected with frequency conversion automatic control system.

[0008] Further, the cold storage loop includes an outdoor cold exchanger, the outdoor cold exchanger is connected with cold storage and supply buffer tank by circulation pipeline, the cold storage and supply buffer tank is connected with earth cold storage body by circulation pipeline, the underground heat exchange pipe is arranged in the earth cold storage body, the medium circulating pump is arranged between the outdoor cold exchanger and the cold storage and supply buffer tank, the cold storage and supply buffer tank and the earth cold storage body are respectively provided with cold storage and release circulating pump, first control valve, second control valve, third control valve and fourth control valve.

[0009] Further, the cooling loop includes a cold storage and supply buffer tank, one end of the cold storage and supply buffer tank is communicated with the earth cold storage body by circulation pipeline, the other end is communicated with cold end by circulation pipeline, the underground heat exchange pipe is arranged in the earth cold storage body, the cold storage and supply buffer tank and the cold end are provided with cooling circulating pump, the cold storage and supply buffer tank and the earth cold storage body are respectively provided with cold storage and release circulating pump, first control valve, second control valve, third control valve and fourth control valve.

[0010] Further, the cold storage and supply buffer tank is a solution storage tank with a thermal insulation layer.

[0011] Further, the earth cold storage body is composed of underground heat exchange pipes and soil, the underground heat exchange pipes and the cold storage buffer tank are communicated through a circulating pipeline, when the temperature of the cold storage buffer tank is lower than a set value, the low-temperature resistant transmission medium in the cold storage buffer tank is circulated to the underground heat exchange pipes by a cold storage circulating pump, and the cold energy is released into the soil.

[0012] Further, the underground heat exchange pipes are composed of pipes with low temperature resistance and good heat transfer coefficient, are arranged horizontally or vertically in the soil, and are in close contact with the soil, so that the cold energy of the low-temperature medium flowing in the pipes is transmitted to the soil through the pipe wall for soil cooling.

[0013] Further, the underground heat exchange pipes are made of U-shaped pipes with an outer diameter of 32 mm and a wall thickness of 3 mm.

[0014] Further, the low-temperature resistant transmission medium is a glycol water solution with a glycol content of 60%.

[0015] Further, the circulating pipeline is a DN40 hot galvanized steel pipe.

[0016] The beneficial effects achieved by the utility model are as follows: the cold energy in nature is stored across time and space by using the thermal inertia of soil, the cold storage temperature is accurately controlled, only a small amount of electric energy is consumed by the circulating pump, the cold energy in the atmosphere is continuously stored in the underground soil in cold seasons, the heat preservation tank is used as a connecting and buffering device, the cold storage and cold supply requirements within-40 DEG C are realized, the system has very low energy consumption and very low operation cost, and has a wide application range. BRIEF DESCRIPTION OF DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the utility model, and constitute a part of the specification, are used to explain the utility model together with embodiments of the utility model, and do not constitute limitations to the utility model.In the drawings:

[0018] Fig. 1 It is the structure schematic view of the utility model;

[0019] Fig. 2 It is the well group plan view of the utility model.

[0020] In the drawing: 1, outdoor cold exchanger;2, medium circulating pump;3, cold storage buffer tank;4, cold storage circulating pump;5, circulating pipeline;6, earth cold storage body;7, underground heat exchange pipe;8, low-temperature resistant transmission medium;9, cold end;10, cold supply circulating pump;11, first control valve;12, second control valve;13, third control valve;14, fourth control valve. CONCRETE EMBODIMENT

[0021] The preferred embodiments of the utility model are described below in combination with the drawings, and it should be understood that the preferred embodiments described herein are only used for illustrating and explaining the utility model, and are not used for limiting the utility model.

[0022] Embodiment 1

[0023] As Figs. 1-2 shown, a controllable cross-season soil cold storage cooling equipment, including cold storage circuit, the cold storage circuit is connected with cooling circuit through circulating pipeline 5, both are electrically connected with frequency conversion automatic control system.

[0024] The cold storage circuit includes outdoor cold exchanger 1, the outdoor cold exchanger 1 is connected with cold storage buffer tank 3 through circulating pipeline 5, and the cold storage buffer tank 3 is connected with earth cold storage body 6 through circulating pipeline 5, the underground heat exchange pipe 7 in earth cold storage body 6 is equipped, medium circulating pump 2 is equipped between the outdoor cold exchanger 1 and cold storage buffer tank 3, and the cold storage buffer tank 3 and earth cold storage body 6 are equipped with cold storage and release circulating pump 4, first control valve 11, second control valve 12, third control valve 13 and fourth control valve 14 respectively.

[0025] The cooling circuit includes cold storage buffer tank 3, one end of the cold storage buffer tank 3 is communicated with earth cold storage body 6 through circulating pipeline 5, and the other end is communicated with cold end 9 through circulating pipeline 5, the underground heat exchange pipe 7 in earth cold storage body 6 is equipped, and cold storage circulating pump 10 is equipped between the cold storage buffer tank 3 and cold end 9, and the cold storage buffer tank 3 and earth cold storage body 6 are equipped with cold storage and release circulating pump 4, first control valve 11, second control valve 12, third control valve 13 and fourth control valve 14 respectively.

[0026] The inlet and outlet of the outdoor cold exchanger 1, cold end 9 and earth cold storage body 6 pipeline are all arranged temperature sensor, temperature sensor is arranged in the soil of different groupings of earth cold storage body 6, and temperature sensor, control valve and circulating pump are all connected into frequency conversion automatic control system.

[0027] When the outdoor temperature is low in the cold season, the low-temperature resistant medium 8 in the cold storage and supply buffer tank 3 is transported to the outdoor cold exchanger 1 and the outdoor cold air by the medium circulating pump 2 for heat exchange. The flow of the medium circulating pump 2 is adjusted by the frequency converter according to the outdoor temperature, so as to control the temperature of the cold storage and supply buffer tank 3. When the low-temperature resistant medium in the cold storage and supply buffer tank 3 is cooled to the set temperature, the low-temperature medium in the cold storage and supply buffer tank 3 is transported to the underground by the underground heat exchange pipe 7 through the cold storage and supply circulating pump 4 for cold exchange, so as to cool the underground soil and achieve the purpose of storing cold according to the set temperature. The ground cold storage body 6 is arranged in different regions, and the soil cold storage temperature in different regions is controllable by switching the electric valve. The soil heat transfer coefficient is low, and the heat inertia is strong, so that the cross-season cold storage is realized. When cold supply is needed, the underground cold quantity is extracted to the cold storage and supply buffer tank 3 through the cold storage and supply circulating pump 4. According to the temperature of the ground cold storage body 6 and the cold supply temperature requirement, each region of the ground cold storage body 6 is switched, and the flow of the cold storage and supply circulating pump 4 is adjusted by the frequency converter, so as to control the medium temperature of the cold storage and supply buffer tank 3, realize the double-controllable cold supply temperature and cold supply quantity, and flexibly adjust according to the change of the cold load and the change of the cold supply temperature requirement, so as to realize the effective adjustment of the temperature and the cold storage and supply quantity in the whole cold storage and supply process.

[0028] The outdoor cold exchanger 1 is a heat exchanger installed outdoors, which can fully exchange heat with the cold air outdoors in the cold season, so as to reduce the temperature of the medium in the heat exchanger. The outdoor cold exchanger 1 is selected from one of ordinary heat exchangers, heat exchange pipes and fan-driven radiators, which have high heat exchange efficiency and low-temperature resistance.

[0029] The cold storage and supply buffer tank 3 is a solution storage tank with a heat preservation layer.

[0030] The ground cold storage body 6 is composed of the underground heat exchange pipe 7 and the soil. The underground heat exchange pipe 7 and the cold storage and supply buffer tank 3 are communicated through the circulating pipe 5. When the temperature of the cold storage and supply buffer tank is lower than the set value, the low-temperature resistant transmission medium 8 in the cold storage and supply buffer tank is circulated to the underground heat exchange pipe 7 by the cold storage and supply circulating pump 4, so as to release the cold quantity to the soil.

[0031] The underground heat exchange pipe 7 is composed of a pipe with low-temperature resistance and good heat transfer coefficient, which can be arranged horizontally or vertically in the soil and closely contact with the soil. The cold quantity of the low-temperature medium flowing in the pipe can be transmitted to the soil through the pipe wall, so as to cool the soil. The underground heat exchange pipe 7 is selected from one of metal pipes, PE pipes and PERT pipes with low-temperature resistance. The underground heat exchange pipe 7 adopts a U-shaped pipe form or a sleeve pipe form.

[0032] The low-temperature transmission medium 8 is a low-temperature resistant liquid. The low-temperature transmission medium 8 is selected from one of propylene glycol aqueous solution, ethylene glycol aqueous solution and heat-conducting oil with low-temperature resistance.

[0033] The outdoor cold exchanger 1 adopts 2 sets of fan-coil heat exchangers, each with a rated cooling capacity of 12.6 kw, installed at an outdoor ventilation place in series through a circulating pipeline 5.

[0034] The circulating pipeline 5 adopts a DN40 hot-dip galvanized steel pipe, which connects the medium circulating pump 2, the cold storage buffer tank 3 and the outdoor cold exchanger 1 to form a circulating pipeline. The cold storage and release circulating pump 4, the cold storage buffer tank 3 and the underground heat exchange pipe 7 form another circulating pipeline.

[0035] The medium circulating pump 2 adopts a low-temperature-resistant stainless steel centrifugal pump.

[0036] The cold storage buffer tank 3 adopts a 6-ton double-layer stainless steel heat preservation water tank, and the heat preservation material adopts polyurethane with a thickness of 10 cm.

[0037] The cold storage and release circulating pump 4 adopts a low-temperature-resistant stainless steel centrifugal pump.

[0038] The underground heat exchange pipe 7 adopts a U-shaped pipe made of an HDPE pipe with an outer diameter of 32 mm and a wall thickness of 3 mm. A ditch with a depth of 2.5 meters is dug on the ground, and then 12 wells are vertically drilled in the soil, each with a depth of 20 meters and a diameter of 30 cm, and the well spacing is 7 meters. The U-shaped pipe is inserted into the soil, and then fine sand is backfilled to ensure that the U-shaped pipe and the sand are in full contact to improve the heat exchange efficiency. Finally, the upper ports of 6 adjacent U-shaped pipes among the 12 U-shaped pipes are connected in series, and then connected to the cold storage and release circulating pump 4 and the cold storage buffer tank 3 through the first control valve 11, the second control valve 12, the third control valve 13 and the fourth control valve 14 to form a circulating loop.

[0039] The low-temperature-resistant transmission medium 8 adopts a glycol water solution with a glycol content of 60%, which can resist a low temperature of -48℃.

[0040] When the outdoor temperature is low in the cold season, the low-temperature resistant medium 8 in the cold storage and supply buffer tank 3 is transported to the outdoor cold heat exchanger 1 and the outdoor cold air by the medium circulating pump 2 for heat exchange. The flow of the medium circulating pump 2 is regulated by the frequency converter according to the outdoor temperature, so as to control the temperature of the cold storage and supply buffer tank 3. After the low-temperature resistant medium in the cold storage and supply buffer tank 3 is cooled to the set temperature, the low-temperature medium in the cold storage and supply buffer tank 3 is transported to the underground for cold exchange by the cold storage and release circulating pump 4 through the underground heat exchange pipe 7, so as to cool the underground soil and achieve the purpose of cold storage according to the set temperature. The underground cold energy is extracted to the cold storage and supply buffer tank 3 by the cold storage and release circulating pump 4 when cooling is needed. The underground cold storage bodies 6 in different regions are switched by electric valves, so that the soil cold storage temperature in different regions is controllable. The underground soil is used for cross-season cold storage due to the low soil heat transfer coefficient and strong thermal inertia. The underground cold energy is extracted to the cold storage and supply buffer tank 3 by the cold storage and release circulating pump 4 when cooling is needed. The underground cold storage bodies 6 in different regions are switched according to the temperature of the underground cold storage body 6 and the cooling temperature requirement. The flow of the cold storage and release circulating pump 4 is regulated by the frequency converter, so as to control the medium temperature of the cold storage and supply buffer tank 3, realize the double controllability of the cooling temperature and the cooling capacity, and flexibly adjust according to the change of the cooling load and the change of the cooling temperature requirement. The temperature and the cold storage and supply capacity of the whole cold storage and supply process are effectively regulated.

[0041] It should be noted that the above only describes the preferred embodiments of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can modify the technical solutions described in the foregoing embodiments or make equivalent replacements to some technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application. The terms used in the description of the present application are only used to describe the specific embodiments and are not intended to limit the exemplary embodiments according to the present application. In order to facilitate description, the sizes of the parts shown in the drawings are not drawn in accordance with the actual proportional relationship. The known technologies, methods and devices may not be discussed in detail, but should be considered as part of the authorized description. In all examples shown and discussed herein, any specific value should be interpreted as merely exemplary and not as a limitation. Therefore, other examples of exemplary embodiments can have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so further discussion is not needed in the subsequent drawings once an item is defined in one drawing.

[0042] It should be noted that the terms "first", "second" and the like in the description and in the claims of the present application are used for distinguishing between similar objects and not necessarily for describing a specific sequential or chronological order. It is to be understood that the data so distinguished can occur in any sequence. Hence, without departing from the scope of the present application, the data used in "first", "second", etc. can be interchanged with each other. The terms "and / or" and / or "or" as used herein link together alternative language alternatives and are understood to mean that at least one of the alternatives is present and that the alternatives are to be taken together. The term "comprises the possibility of comprising additional elements or steps not listed after the term comprises.

[0043] It should be noted that the terms "front", "rear", "upper", "lower", "left", "right", "horizontal", "vertical", "top", "bottom", and the like as used in this description and in the claims shall relate to the application as it is shown in the drawings and shall not be construed to limit the application to a particular orientation or configuration, unless otherwise noted. The terms "inner", "outer" refer to the inner and outer contours of the components themselves.

Claims

1. A controllable cross-seasonal soil thermal storage cooling device, characterized in that, The cold storage circuit is connected with the cold supply circuit through a circulating pipeline, and both are electrically connected with a variable frequency automatic control system; The cold storage circuit comprises an outdoor cold exchanger connected with a cold storage and supply buffer tank through a circulating pipeline, and the cold storage and supply buffer tank is connected with an earth cold storage body through a circulating pipeline, the earth cold storage body is provided with underground heat exchange pipes, a medium circulating pump is arranged between the outdoor cold exchanger and the cold storage and supply buffer tank, and the cold storage and supply buffer tank and the earth cold storage body are respectively provided with a cold storage and release circulating pump, a first control valve, a second control valve, a third control valve and a fourth control valve. The cold supply circuit comprises a cold storage and supply buffer tank, one end of the cold storage and supply buffer tank is communicated with the earth cold storage body through a circulating pipeline, and the other end is communicated with a cold end through a circulating pipeline, the earth cold storage body is provided with underground heat exchange pipes, a cold supply circulating pump is arranged between the cold storage and supply buffer tank and the cold end, and the cold storage and supply buffer tank and the earth cold storage body are respectively provided with a cold storage and release circulating pump, a first control valve, a second control valve, a third control valve and a fourth control valve.

2. The controllable trans-seasonal soil-cooling and -cooling device according to claim 1, characterized in that The cold storage and supply buffer tank is a solution storage tank with a heat preservation layer.

3. The controllable transseasonal soil-cooling cooling device according to claim 1, characterized in that The earth cold storage body is composed of underground heat exchange pipes and soil, the underground heat exchange pipes and the cold storage and supply buffer tank are communicated through a circulating pipeline, and when the temperature of the cold storage and supply buffer tank is lower than a set value, the low-temperature resistant transmission medium of the cold storage and supply buffer tank is circulated to the underground heat exchange pipes by the cold storage and release circulating pump to release cold energy to the soil.

4. The controllable transseasonal soil-cooling cooling device according to claim 1, characterized in that The underground heat exchange pipes are composed of pipes with low-temperature resistance and good heat transfer coefficient, are arranged horizontally or vertically in the soil, and are in close contact with the soil, so that the cold energy of the low-temperature medium flowing in the pipes is transmitted to the soil through the pipe wall to cool the soil.

5. The controllable trans-seasonal soil-cooling and -cooling device according to claim 1, characterized in that, The underground heat exchange pipes are U-shaped pipes made of HDPE pipes with an outer diameter of 32 mm and a wall thickness of 3 mm.

6. The controllable transseasonal soil-cooling cooling device according to claim 3, characterized in that The low-temperature resistant transmission medium is a glycol water solution with a glycol content of 60%.

7. The controllable transseasonal soil-cooling cooling device according to claim 1, characterized in that The circulating pipeline is a DN40 hot-dip galvanized steel pipe.

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