Thermolator and air conditioning system

Abstract

The utility model provides a thermolator and an air conditioning system. The thermolator comprises a heat exchange cavity filled with heat exchange liquid, and the heat exchange cavity is provided with a liquid inlet with a switch valve and a liquid outlet with a switch valve; the heat exchange pipe is arranged in the heat exchange cavity and is used for receiving external cold energy or heat energy and providing cold energy or heat energy for a tail end load after the temperature is adjusted by the heat exchange liquid; the external heat exchange assembly is connected with the liquid inlet and the liquid outlet of the heat exchange cavity through pipelines to form a loop and used for extracting the heat exchange liquid out of the heat exchange cavity to exchange heat with the external environment so as to adjust the heat conductivity of the heat exchange cavity.

Description

Technical Field

[0001] The utility model relates to the technical field of thermostats, in particular to a thermostat capable of adjusting thermal conductivity, and an air conditioning system using the thermostat. Background Art

[0002] In modern industrial and commercial applications, refrigeration systems play a vital role in ensuring equipment and environmental temperature control. In order to provide the specified supply temperature to the end load, the refrigeration system needs to be precisely designed and controlled to meet different temperature requirements. In these systems, the cold or heat usually passes through a thermostat, is regulated by the thermostat liquid, and then sent to the end load. Water is usually used as the thermostat liquid, so the thermostat is usually a simple cold water storage tank. This system must not only ensure temperature control, but also minimize energy consumption and improve efficiency. However, in actual application, the operation and energy efficiency of the refrigeration system are often significantly affected by the ambient temperature, which brings a series of technical problems and challenges.

[0003] In a typical refrigeration system, the cooling unit controls the supply temperature by controlling the on / off of the machine and mixing the cooling medium of different temperatures in the cold storage water tank. The water in the cold storage water tank exchanges heat with the refrigerant to control the supply temperature. However, in order to improve energy efficiency, the cold storage water tank is usually insulated with foam rubber to avoid heat exchange between the low-temperature coolant and the outside air, thereby reducing energy consumption. This insulation measure can effectively reduce heat loss and keep the coolant at a low temperature under normal temperature. However, when the ambient temperature changes significantly, especially in winter and summer, the insulation measures may instead lead to increased system energy consumption and even affect the cooling effect.

[0004] In winter, when the ambient temperature is low (such as -10°C), in order to save energy, the refrigeration system usually switches to conventional air-liquid cooling mode. At this time, the system no longer relies on compressor refrigeration, but uses outside air to cool the coolant. In this case, the coolant temperature at the outlet of the liquid cooling device is actually higher than the ambient temperature. However, due to the insulation measures of the cold storage water tank, the heat exchange between the coolant and the outside air is greatly reduced after entering the cold storage water tank, which causes the temperature of the coolant at the end load inlet to be higher than when there is no cold storage water tank. In order to ensure sufficient heat dissipation capacity, the cooling fan needs to increase the speed, resulting in increased energy consumption. In this case, the insulation measures of the cold storage water tank have the opposite effect, increasing the overall energy consumption of the system.

[0005] The same situation also occurs when the refrigeration system needs to provide heat to the terminal load. In the hot summer, when the ambient temperature is high, the refrigeration system needs to provide heat to maintain the normal operation of certain equipment at the terminal. At this time, the insulation measures of the cold storage tank (which accumulates heat at this time) will cause the temperature of the coolant at the inlet of the terminal load to be lower than when there is no cold storage tank, which will also have a side effect and affect the efficiency and energy consumption of the system. In this case, the insulation measures make it impossible for the cold storage tank to effectively use the high-temperature air outside to heat the coolant, but instead increase the energy consumption of the system.

[0006] In addition, as the ambient temperature fluctuates, the operating mode and efficiency of the refrigeration system will be different in different seasons and climate conditions. This requires the thermostat to have higher flexibility and adaptability to meet the operating requirements under various environmental conditions. However, the insulation measures of traditional thermostats are usually static and difficult to adjust according to environmental changes, which to some extent limits the system's operating efficiency and energy efficiency optimization.

[0007] Therefore, how to develop a temperature control box that can adjust the thermal conductivity according to actual conditions to adapt to different environmental conditions and operating requirements is an important technical problem that needs to be solved at present. Utility Model Content

[0008] The utility model provides a thermostat and an air conditioning system to solve the technical problem that the thermostat in the prior art cannot adjust the thermal conductivity at a special ambient temperature and instead plays a negative role.

[0009] The thermostat of the utility model comprises:

[0010] A heat exchange chamber filled with a heat exchange liquid, and the heat exchange chamber has a liquid inlet and a liquid outlet with a switch valve;

[0011] A heat exchange tube, which is arranged in the heat exchange cavity, is used to receive external cold or heat, and then provide cold or heat to the end load after being temperature-controlled by the heat exchange fluid;

[0012] The external heat exchange component is connected to the liquid inlet and liquid outlet of the heat exchange chamber through pipelines to form a loop, and is used to extract the heat exchange liquid from the heat exchange chamber to exchange heat with the external environment to adjust the thermal conductivity of the heat exchange chamber.

[0013] Furthermore, the heat exchange chamber is made of thermal insulation material.

[0014] Furthermore, the heat exchange tube is made of heat-conducting metal.

[0015] Furthermore, the external heat exchange component includes at least one temperature adjustment chamber and a circulation pump connected in series through the pipeline.

[0016] Furthermore, the temperature adjustment chambers are provided with two, which are respectively arranged at the liquid inlet and the liquid outlet.

[0017] Furthermore, at least one outer surface of the temperature adjustment chamber is provided with a heat dissipation groove.

[0018] Furthermore, the liquid inlet and the liquid outlet are respectively located at the bottom and the top of the heat exchange chamber.

[0019] Further, the heat exchange tube includes: a main inlet pipe, a main outlet pipe, and multiple branch pipes connecting the main inlet pipe and the main outlet pipe, wherein the multiple branch pipes are arranged in a row at intervals according to the length or thickness of the heat exchange cavity, and are bent back and forth in the height direction to be arranged vertically.

[0020] The air conditioning system proposed in the utility model includes a terminal load, a thermostat of any one of the embodiments of the above technical solutions, a refrigeration module for providing cold or heat, and a circulation pipeline that sends the cold or heat provided by the refrigeration module to the thermostat for temperature adjustment, exchanges heat with the terminal load, and then flows back to the refrigeration module.

[0021] Furthermore, the refrigeration module includes at least one of a refrigeration unit, a surface cooler, and refrigeration units and surface coolers connected in parallel.

[0022] The utility model provides an external heat exchange component for the thermostat, and adjusts the thermal conductivity according to the ambient temperature, the inlet and outlet temperatures of the refrigeration unit and the set temperature by controlling the circulation pump of the thermostat and the opening or closing of the switch valve, and then adjusts the thermal conductivity according to the set temperature and the outlet temperature T of the surface cooler. 2 The temperature difference is used to control the circulation pump to turn on or off, so that the coolant inside the thermostat exchanges heat with the outside through the thermostat cavity. Furthermore, the heat exchange tube of the utility model is vertically arranged inside the thermostat, and the good heat conductivity of the heat dissipation oil is used to adjust the temperature difference of the coolant in the heat exchange tube, thereby avoiding the phenomenon of stratification and uneven temperature of the coolant temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention is described in detail below with reference to the embodiments and drawings, wherein:

[0024] Figure 1 It is a three-dimensional schematic diagram of the appearance of a thermostat according to an embodiment of the utility model.

[0025] Figure 2 It is a schematic diagram of the internal structure of a thermostat according to an embodiment of the utility model.

[0026] Figure 3 It is a structural schematic diagram of an air conditioning system according to an embodiment of the utility model.

[0027] Figure 4 It is a control flow chart of a thermostat according to an embodiment of the utility model.

[0028] Description of reference numerals:

[0029] 1. Thermostat; 2. End load; 3. Electric three-way valve; 4. Plate heat exchanger; 5. Compressor; 6. Low-pressure switch; 7. High-pressure switch; 8. Throttling mechanism; 9. Condensing fan; 10. Condenser; 11. Surface cooler; 12. Liquid supply pump.

[0030] 101. heat exchange chamber; 102. switch valve; 103. temperature control chamber; 104. heat exchange tube; 105. circulation pump.

[0031] 1041. Main inlet pipe; 1042. Main outlet pipe. DETAILED DESCRIPTION

[0032] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0033] Thus, a feature indicated in this specification will be used to illustrate one of the features of an embodiment of the utility model, rather than implying that each embodiment of the utility model must have the described feature. In addition, it should be noted that this specification describes many features. Although some features can be combined together to illustrate possible system designs, these features can also be used in other combinations that are not explicitly described. Thus, unless otherwise stated, the described combinations are not intended to be limiting.

[0034] The utility model aims at the problem that in the prior art, a water tank is used as a thermostat. Since the heat preservation measure is a static and fixed heat preservation measure, in some very low temperature environments, the water tank will increase energy consumption in temperature regulation, affect system efficiency, and bring side effects. The thermostat of the utility model is proposed.

[0035] The thermostat of the utility model comprises a heat exchange cavity, a heat exchange tube and an external heat exchange component.

[0036] The heat exchange chamber is filled with heat exchange liquid, and the heat exchange chamber also has a liquid inlet and a liquid outlet, and both the liquid inlet and the liquid outlet are provided with a switch valve. The heat exchange chamber can also have a heat preservation layer as in the prior art, so as to meet the temperature adjustment requirements of the normal temperature environment. The switch valve of the utility model can be an electric valve.

[0037] The heat exchange tube is arranged in the heat exchange cavity. The coolant in the heat exchange tube (the coolant can carry cold or heat) does not directly mix with the heat exchange liquid in the heat exchange cavity, but only exchanges heat with the heat exchange liquid in the heat exchange cavity. The heat exchange tube is used to receive cold or heat from the outside, and then provide cold or heat to the end load after the temperature is adjusted by the heat exchange liquid. The outside referred to in the utility model is an external device relative to the thermostat. The external device that can provide cold or heat can be a refrigeration unit, a heat pump unit, or a surface cooler.

[0038] The external heat exchange component is connected to the liquid inlet and outlet of the heat exchange chamber through pipelines to form a loop. The external heat exchange component is used to extract the heat exchange liquid from the heat exchange chamber and then exchange heat with the external environment to adjust the thermal conductivity of the heat exchange chamber.

[0039] The utility model arranges an external heat exchange component on the thermostat, through which the temperature of the heat exchange fluid in the thermostat can be adjusted to match the external ambient temperature, thereby realizing a thermostat with adjustable thermal conductivity, which can not only improve the energy efficiency of the refrigeration system, but also achieve energy conservation and emission reduction in a wider range of applications, and has important practical significance and broad application prospects.

[0040] In one embodiment, the heat exchange chamber of the utility model is made of heat-insulating material, that is, the outer shell of the heat exchange chamber is a heat-insulating layer, and since the heat-insulating layer is usually made of foamed plastic, it has a good heat-insulating effect.

[0041] In a preferred embodiment, the heat exchange tube is made of heat-conducting metal. Since the heat exchange tube is made of heat-conducting metal, it is more conducive to heat exchange between the coolant in the heat exchange tube and the heat exchange liquid in the heat exchange cavity.

[0042] In a specific embodiment, the external heat exchange component includes at least one temperature regulating chamber and a circulation pump connected in series through a pipeline. Under the action of the circulation pump, the heat exchange fluid in the heat exchange chamber flows through the temperature regulating chamber, exchanges heat with the external environment through the temperature regulating chamber, and then returns to the heat exchange chamber, thereby adjusting the thermal conductivity of the thermostat.

[0043] In one embodiment, two temperature adjustment chambers are provided, which are respectively arranged at the liquid inlet and the liquid outlet. The temperature adjustment chamber has a large outer surface area, which can fully exchange heat with the external environment, so that the temperature of the heat exchange liquid is more adapted to the ambient temperature. The increase in the number of temperature adjustment chambers can improve the heat exchange efficiency and speed up the process of temperature adjustment and thermal conductivity adjustment.

[0044] In a preferred embodiment, at least one outer surface of the temperature control chamber is provided with a heat dissipation groove. Providing the heat dissipation groove on the outer surface of the temperature control chamber can effectively increase the surface area of ​​the temperature control chamber. For example, a circle of annular heat dissipation grooves can be provided around the temperature control chamber, and heat dissipation ridges can be formed between the heat dissipation grooves, which is more conducive to rapid temperature control of the temperature control chamber.

[0045] In one embodiment, the liquid inlet and the liquid outlet are respectively located at the bottom and the top of the heat exchange chamber. The liquid inlet and the liquid outlet are arranged at the bottom and the top, which can effectively avoid the stratification of the heat exchange liquid in the heat exchange chamber.

[0046] In a further embodiment, the heat exchange tube of the utility model comprises: a main inlet tube, a main outlet tube, and a plurality of branch tubes connecting the main inlet tube and the main outlet tube. The plurality of branch tubes are arranged in a row starting from the position where the main inlet tube is located according to the length or thickness of the heat exchange cavity, and then bent back and forth in the height direction to be arranged vertically, so that the coolant in the heat exchange tube travels in the heat exchange cavity in an up-and-down vertical direction, thereby avoiding the phenomenon of liquid stratification and temperature unevenness in the heat exchange cavity.

[0047] The heat exchange fluid of the present invention can be heat exchange oil or other heat exchange media, and those skilled in the art can select according to needs.

[0048] Figure 1 , Figure 2 A specific structural diagram of a preferred embodiment of the utility model is given. The thermostat 1 in this embodiment includes a thermostat chamber 103, a coolant, a heat exchange liquid and a switch valve 102. The shell of the heat exchange chamber 101 is mainly divided into three layers. From the inside to the outside, the first layer is a heat exchange tube 104 with high thermal conductivity and good corrosion resistance. Stainless steel or copper can be used to improve the heat exchange capacity between the heat exchange tube 104 and the heat exchange liquid in the heat exchange chamber. The second layer is the heat exchange chamber. Heat dissipation oil with good thermal conductivity can be injected into the heat exchange chamber as the heat exchange liquid. When the switch valve 102 is opened, the heat dissipation oil and the thermostat chamber 103 are connected. At this time, the circulating pump 105 allows the coolant in the heat exchange tube 104 to exchange heat with the outside through the heat dissipation oil, thereby further adjusting the liquid supply temperature to make it closer to the set temperature and improve the energy efficiency of the unit. The third layer is the insulation layer of the shell of the heat exchange chamber, which has a good insulation effect.

[0049] The main inlet pipe 1041 and the main outlet pipe 1042 of the heat exchange tube 104 are arranged at the bottom, and a plurality of branch pipes connecting the main inlet pipe 1041 and the main outlet pipe 1042 are vertically arranged in the heat exchange chamber.

[0050] The utility model sets a foam rubber with good thermal insulation effect on the outermost layer, and the switch valve 102 also adopts a rubber material with low thermal conductivity. When the switch valve 102 is closed, the outermost foam rubber and the switch valve 102 will form a closed thermal insulation chamber to avoid heat loss of the coolant and reduce the energy consumption of the unit. The heat exchange tubes 104 inside the temperature adjustment chamber 103 are vertically evenly distributed, and the liquid inlet and outlet of the temperature adjustment chamber 103 are connected to the heat dissipation oil in the gap layer. By utilizing the high thermal conductivity of the heat dissipation oil in the heat exchange tube 104, the temperature of the coolant can be quickly integrated, effectively avoiding the phenomenon of stratification and uneven temperature of the coolant.

[0051] The utility model also protects an air conditioning system, which includes a terminal load, a thermostat according to any embodiment of the above technical solution, a refrigeration module for providing cold or heat, and a circulation pipeline. The circulation pipeline sends the cold or heat provided by the refrigeration module to the thermostat for temperature adjustment, and then sends the temperature-adjusted cold or heat to the terminal load, exchanges heat with the terminal load, and then flows back to the refrigeration module, and after the refrigeration module cools down or heats up again, the above cycle is repeated.

[0052] By setting a thermostat that can adjust thermal conductivity, the air-conditioning system can better meet the needs of the end load under certain ambient temperature conditions and avoid energy waste.

[0053] In a preferred embodiment, the refrigeration module includes at least one of a refrigeration unit, a surface cooler, and refrigeration units and surface coolers connected in parallel. The refrigeration unit can provide cooling or heat to provide the required cooling or heat for the terminal load. The use of the surface cooler is relatively limited, and it is only suitable for situations where the ambient temperature is relatively suitable. When the refrigeration unit and the surface cooler are connected in parallel, the advantages of both can be utilized. When the ambient temperature is suitable, the surface cooler is used. If the ambient temperature is not suitable, the refrigeration unit is used.

[0054] Figure 3 A specific system structure diagram of an air conditioning system is given, and the air conditioning system includes a terminal load 2, a temperature sensor, an electric three-way valve 3, a surface cooler, a condenser, a plate heat exchanger 4, a throttling mechanism 8, a compressor 5, a high-pressure switch 7, a low-pressure switch 6, a condensing fan 9, a thermostat 1, a liquid supply pump, etc. The air conditioning system can control the electric three-way valve 3 to complete the switching between the refrigeration mode of the compressor 5 and the conventional air-liquid cooling mode. When the terminal load 2 is cooled, the circulation process is that the liquid supply pump of the liquid cooling device sends the coolant to the plate heat exchanger 4 or the surface cooler for heat exchange, and after obtaining the low-temperature coolant, it passes through the thermostat 1 to adjust the temperature difference or heat exchange, and then provides heat dissipation for the terminal load 2, and finally returns to the liquid supply pump to complete a cycle.

[0055] The temperature sensor includes a temperature sensor that measures the coolant temperature T after being adjusted by the thermostat 1The temperature sensor measures the temperature T after the coolant exchanges heat with the surface cooler 2 The temperature sensor measures the temperature T of the coolant after heat exchange with the end load. 3 The temperature sensor.

[0056] When the compressor is cooling, the flow path of the liquid cooling unit is: liquid supply pump → end load → electric three-way valve → plate heat exchanger → electric three-way valve → thermostat → liquid supply pump.

[0057] In conventional air-liquid cooling, the flow path of the liquid cooling unit is: liquid supply pump → end load → electric three-way valve → surface cooler → electric three-way valve → thermostat → liquid supply pump.

[0058] like Figure 4 As shown, the air conditioning system of the utility model has a compressor cooling mode and a conventional air-liquid cooling mode when controlling the thermostat. When the ambient temperature T is lower than -10°C, the conventional air-liquid cooling mode is turned on. At this time, the system will detect the temperature T after the surface cooler heat exchange. 2 and set temperature T 设 The temperature difference is used to adjust the switch valve of the thermostat and the frequency of the circulating pump; when T 2 -T 设 When the temperature is greater than 5℃, the temperature difference between the supply temperature and the set temperature is large, and the heat exchange efficiency of the end load is low, which affects the heat exchange of the end load. It is necessary to further reduce T quickly. 2 and T, at this time the switch valve opens and the circulating pump runs at the maximum frequency; when 5>T 2 -T 设 >2℃, at this time T 2 It is close to T, and the circulating pump does not need to run at the maximum frequency H3, so the circulating pump frequency is increased to H2. Similarly, 2>T 2 -T 设 >1℃, the circulating pump frequency rises to H1, when T 2 <T 设 At this time, T 2 The temperature difference between T and T is small, so the circulating pump is closed and only the switch valve is opened. The cooling oil and the temperature regulating chamber are connected. At this time, the coolant can exchange heat with the outside world through the cooling oil, and then further adjust the liquid supply temperature to make it closer to the set temperature, thereby improving the energy efficiency of the cooling unit.

[0059] This control process is a specific embodiment formulated for heat dissipation of the terminal load, and the specific temperature values ​​therein are for illustration only. Those skilled in the art may adjust the specific temperature values ​​as needed, and all of them fall within the protection scope of the present utility model.

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A thermostat, characterized in that: include: A heat exchange chamber filled with a heat exchange liquid, and the heat exchange chamber has a liquid inlet and a liquid outlet with a switch valve; A heat exchange tube, which is arranged in the heat exchange cavity, is used to receive external cold or heat, and then provide cold or heat to the end load after being temperature-controlled by the heat exchange fluid; The external heat exchange component is connected to the liquid inlet and liquid outlet of the heat exchange chamber through pipelines to form a loop, and is used to extract the heat exchange liquid from the heat exchange chamber to exchange heat with the external environment to adjust the thermal conductivity of the heat exchange chamber.

2. The thermostat according to claim 1, characterized in that The heat exchange cavity is made of heat-insulating material.

3. The thermostat according to claim 2, characterized in that The heat exchange tube is made of heat conductive metal.

4. The thermostat according to claim 1, characterized in that The external heat exchange component includes at least one temperature adjustment chamber and a circulation pump connected in series through the pipeline.

5. The thermostat according to claim 4, characterized in that The temperature adjustment chambers are provided with two, which are respectively arranged at the liquid inlet and the liquid outlet.

6. The thermostat according to claim 4, characterized in that At least one outer surface of the temperature adjustment chamber is provided with a heat dissipation groove.

7. The thermostat according to any one of claims 1 to 5, characterized in that: The liquid inlet and the liquid outlet are respectively located at the bottom and the top of the heat exchange chamber.

8. The thermostat according to claim 7, characterized in that The heat exchange tubes include: a main inlet tube, a main outlet tube, and multiple branch tubes connecting the main inlet tube and the main outlet tube. The multiple branch tubes are arranged in a row according to the length or thickness of the heat exchange cavity, and are bent back and forth in the height direction to be arranged vertically.

9. An air conditioning system, characterized in that: It includes an end load, a thermostat as described in any one of claims 1 to 8, and a refrigeration module for providing cold or heat, wherein the cold or heat provided by the refrigeration module is sent to the thermostat for temperature adjustment, heat is exchanged with the end load, and then flows back to the circulation pipeline of the refrigeration module.

10. The air conditioning system according to claim 9, characterized in that The refrigeration module includes at least one of a refrigeration unit, a surface cooler, and refrigeration units and surface coolers connected in parallel.

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