Precise temperature control type miniature air cooler

Abstract

The utility model relates to the technical field of miniature air coolers, and discloses a precise temperature control type miniature air cooler which comprises a compressor, a condenser, a condensation fan, a throttling element, an evaporator, an evaporation fan, a controller, an environment temperature sensor, an exhaust temperature sensor and a cold air temperature sensor. The exhaust temperature sensor is used for detecting the exhaust temperature of the compressor, and the cold air temperature sensor is used for detecting the air outlet temperature of the evaporator. The controller controls the rotating speed of the condenser and the rotating speed of the evaporator through data detected by the environment temperature sensor and the cold air temperature sensor, it is ensured that the air volume is matched with the heat exchange amount, precise temperature control is achieved, and the heat dissipation effect and the refrigeration performance are improved; 2, under the standard working condition COPgt; and 3, energy efficiency is high, energy is saved, emission is reduced, and environment is protected.

Description

Technical Field

[0001] This utility model patent relates to the technical field of miniature air coolers, and more specifically, to a precision temperature-controlled miniature air cooler. Background Technology

[0002] With the development of technology, many users of biological, medical and electronic instruments have higher and higher requirements for refrigeration systems, and products are required to be smaller and smaller. The temperature control accuracy requirements have also changed from ±5℃, ±3℃ and ±2℃ that can be achieved by the initial temperature difference control to ±1℃ and ±0.5℃ that can be achieved by constant temperature control.

[0003] Currently, heat dissipation is achieved through miniature air coolers. For example, the prior patent with authorization announcement number CN220250420U discloses a heat dissipation device for a refrigeration unit, including a heat dissipation base. Mesh plates are horizontally installed on both sides of the inner cavity of the heat dissipation base. A unit body is mounted on the top of the mesh plates, and the top of the unit body penetrates the top of the heat dissipation base. A miniature air cooler is installed at the bottom of the inner cavity of the heat dissipation base. Air outlet pipes are connected to both sides of the miniature air cooler, and an air intake pipe is connected to the rear side of the miniature air cooler. Heat dissipation pipes are connected to both sides of the bottom of the heat dissipation base. The miniature air cooler and the heat dissipation motor are started by an external controller.

[0004] In the current technology, miniature air coolers cannot achieve precise temperature control, which easily leads to energy waste and low energy efficiency, and does not conform to the current social trend of energy conservation and emission reduction. Utility Model Content

[0005] The purpose of this invention is to provide a precision temperature-controlled miniature air cooler, which aims to solve the problem that existing miniature air coolers cannot achieve precise temperature control.

[0006] This invention is implemented as follows: a precision temperature-controlled miniature air cooler includes a compressor, a condenser, a condenser fan, a throttling device, an evaporator, an evaporator fan, a controller, an ambient temperature sensor, an exhaust temperature sensor, and a cold air temperature sensor. The compressor, the condenser, the condenser fan, the throttling device, the evaporator, the evaporator fan, the ambient temperature sensor, the exhaust temperature sensor, and the cold air temperature sensor are all electrically connected to the controller. The ambient temperature sensor is used to detect the ambient temperature of the condenser, the exhaust temperature sensor is used to detect the exhaust temperature of the compressor, and the cold air temperature sensor is used to detect the outlet temperature of the evaporator.

[0007] Furthermore, the condenser has a condenser air inlet, the ambient temperature sensor is disposed at the condenser air inlet, and the ambient temperature sensor is used to feed back the temperature of the condenser air inlet to the controller, the controller adjusts the speed of the condenser fan based on the data fed back by the ambient temperature sensor.

[0008] Furthermore, the controller has a condensing temperature range, and the condensing fan has different speed ranges, with the condensing temperature range corresponding to different speed ranges.

[0009] Furthermore, the condenser fan is a DC speed-regulating axial fan.

[0010] Furthermore, the evaporator has an evaporation air outlet, the cold air temperature sensor is installed at the evaporation air outlet, and the cold air temperature sensor is used to feed back the temperature of the evaporation air outlet to the controller, and the controller adjusts the speed of the evaporation fan based on the data fed back by the cold air temperature sensor.

[0011] Furthermore, the controller has an evaporation temperature range, and the evaporation fan has different speed ranges, with the evaporation temperature range corresponding to different speed ranges.

[0012] Furthermore, the precision temperature-controlled miniature air cooler includes a heater, which is assembled with the evaporator and is used to defrost the evaporator; the heater includes a heating tube, the evaporator has a reserved copper tube, and the heating tube is installed inside the reserved copper tube.

[0013] Furthermore, the precision temperature-controlled miniature air cooler includes a defrost temperature sensor, which is circuitically connected to the controller and assembled with the evaporator. The defrost temperature sensor is used to detect the surface temperature of the evaporator.

[0014] Furthermore, the throttling element is an expansion valve or a capillary throttling component.

[0015] Furthermore, the precision temperature-controlled miniature air cooler includes an exhaust temperature sensor, which is electrically connected to the controller and is arranged correspondingly to the exhaust port of the compressor. The exhaust temperature sensor is used to detect the exhaust temperature of the compressor.

[0016] Compared with existing technologies, the precision temperature-controlled miniature air cooler provided by this utility model uses a compressor to draw low-pressure, low-temperature refrigerant gas from the evaporator, compress it into high-pressure, high-temperature refrigerant gas, and send it into the condenser. Under the action of the condenser fan, it is condensed into high-pressure, room-temperature refrigerant liquid and enters the evaporator to achieve a cooling effect. The controller uses data detected by the ambient temperature sensor and the cold air temperature sensor to control the speed of the condenser and the evaporator respectively, ensuring that the air volume and heat exchange are matched, achieving precise temperature control, improving heat dissipation and cooling performance. Furthermore, the miniature air cooler has a COP>2 under all operating conditions within its operating range, and a COP>3 under standard operating conditions, resulting in high energy efficiency, energy saving, emission reduction, and greater environmental friendliness. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the principle of the precision temperature-controlled miniature air cooler provided by this utility model;

[0018] Figure 2 This is a control diagram of the controller for the precision temperature-controlled miniature air cooler provided by this utility model;

[0019] Figure 3 This is a three-dimensional internal view of the precision temperature-controlled miniature air cooler provided by this utility model;

[0020] Figure 4 This is a three-dimensional schematic diagram of the heater layout of the precision temperature-controlled miniature air cooler provided by this utility model. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0022] The implementation of this utility model will be described in detail below with reference to specific embodiments.

[0023] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0024] Reference Figure 1-4The image shown is a preferred embodiment of the present invention.

[0025] A precision temperature-controlled miniature air cooler includes a compressor 1, a condenser 2, a condenser fan 21, a throttling device 3, an evaporator 4, an evaporator fan 41, a controller 5, an ambient temperature sensor 22, an exhaust temperature sensor 11, and a cold air temperature sensor 42. The compressor 1, condenser 2, condenser fan 21, throttling device 3, evaporator 4, evaporator fan 41, ambient temperature sensor 22, exhaust temperature sensor 11, and cold air temperature sensor 42 are all connected to the controller 5 in a circuit configuration. The ambient temperature sensor 22 is used to detect the ambient temperature of the condenser 2, the exhaust temperature sensor 11 is used to detect the exhaust temperature of the compressor 1, and the cold air temperature sensor 42 is used to detect the outlet air temperature of the evaporator 4.

[0026] The aforementioned precision temperature-controlled miniature air cooler uses compressor 1 to draw low-pressure, low-temperature refrigerant gas from evaporator 4, compressing it into high-pressure, high-temperature refrigerant gas and sending it into condenser 2. Under the action of condenser fan 21, it condenses into high-pressure, room-temperature refrigerant liquid and enters evaporator 4 to achieve a cooling effect. Controller 5 uses data detected by ambient temperature sensor 22 and cold air temperature sensor 42 to control the rotation speed of condenser 2 and evaporator 4 respectively, ensuring that airflow and heat exchange are matched, achieving precise temperature control, improving heat dissipation and cooling performance. Furthermore, the miniature air cooler has a COP>2 under all operating conditions within its operating range, and a COP>3 under standard operating conditions, demonstrating high energy efficiency, energy saving, emission reduction, and environmental friendliness.

[0027] The condenser 2 has a condenser air inlet, and an ambient temperature sensor 22 is installed at the condenser air inlet. The ambient temperature sensor 22 is used to feed back the temperature of the condenser air inlet to the controller 5. The controller 5 adjusts the speed of the condenser fan 21 based on the data fed back by the ambient temperature sensor 22.

[0028] This allows the ambient temperature sensor 22 to detect the ambient temperature of the condenser 2, thereby accurately feeding back the ambient temperature at the air inlet of the condenser 2 to achieve optimal heat dissipation performance.

[0029] The controller 5 has a condensing temperature range, and the condensing fan 21 has different speed ranges. The condensing temperature range corresponds to different speed ranges. The speed of the condensing fan 21 is adjusted according to the condensing temperature range to ensure that the air volume of the condensing fan 21 matches the heat exchange of the condenser 2, so as to obtain the best cooling performance.

[0030] The condenser fan 21 is a DC speed-regulating axial fan, which facilitates the control of the condenser fan 21 and the speed adjustment of the condenser fan 21.

[0031] Evaporator 4 has an evaporation air outlet, and cold air temperature sensor 42 is installed at the evaporation air outlet. The cold air temperature sensor 42 is used to feed back the temperature of the evaporation air outlet to the controller 5. The controller 5 adjusts the speed of the evaporation fan 41 based on the data fed back by the cold air temperature sensor 42.

[0032] This allows the cold air temperature sensor 42 to detect the outlet air temperature of the evaporator 4, thereby accurately feeding back the temperature of the cold evaporator outlet air to obtain the best cooling performance.

[0033] The controller 5 has an evaporation temperature range, and the evaporation fan 41 has different speed ranges. The evaporation temperature range corresponds to different speed ranges. The speed of the evaporation fan 41 is adjusted according to the evaporation temperature range to ensure that the air volume of the evaporation fan 41 matches the heat exchange of the evaporator 4, so as to obtain the best cooling performance.

[0034] The evaporator fan 41 is a DC speed-regulating centrifugal fan, which facilitates the control and speed adjustment of the evaporator fan 41.

[0035] The precision temperature-controlled miniature air cooler includes a heater 6, which is assembled with the evaporator 4. The heater 6 is used to defrost the evaporator 4. Electric defrosting is used to avoid frost buildup on the evaporator 4, which would affect its operation.

[0036] The heater 6 includes a heating tube, and the evaporator 4 has a reserved copper tube. The heating tube is installed inside the reserved copper tube. This ensures that the heating tube and the evaporator 4 are in close contact, resulting in good heat exchange and improved defrosting effect.

[0037] The precision temperature-controlled mini air cooler includes a defrost temperature sensor 43, which is connected to the controller 5 in a circuit and is assembled with the evaporator 4. The defrost temperature sensor 43 is used by the user to detect the surface temperature of the evaporator 4.

[0038] Under the action of defrost temperature sensor 43, the surface temperature of evaporator 4 is detected in real time. Based on the data fed back by defrost temperature sensor 43, controller 5 controls heater 6 to defrost.

[0039] The heater 6 has a defrost cycle, defrost running time, defrost entry temperature, and initial defrost exit temperature, all of which can be preset in the controller 5.

[0040] When the defrosting cycle arrives, the controller 5 detects the surface temperature of the evaporator 4 through the defrosting temperature sensor 43 and determines whether to enter the defrosting mode based on the surface temperature of the evaporator 4. After entering the defrosting mode, defrosting is carried out according to the preset defrosting operation time. When the defrosting operation time is reached, the defrosting mode is exited. During this period, if the defrosting temperature sensor 43 detects that the surface temperature of the evaporator 4 has reached the defrosting exit temperature, the defrosting mode can also be exited.

[0041] Between defrosting operation time and defrosting exit temperature, temperature control takes priority.

[0042] Throttling element 3 is an expansion valve or capillary tube throttling component; through throttling element 3, the pressure of high-pressure room-temperature refrigerant liquid is reduced, and the reduced-pressure refrigerant liquid is delivered to evaporator 4.

[0043] The compressor 1 is a DC24V compressor 1, the condenser 2 is a microchannel condenser 2, the condenser fan 21 and the evaporator fan 41 are respectively arranged with adjustable speed, and the controller 5 includes a compressor 1 drive board, which is used to drive the compressor 1; in this way, it is convenient for the coordination of various components.

[0044] The refrigerant can be R134a, R513a, or R1234yf, which are environmentally friendly refrigerants.

[0045] The precision temperature-controlled miniature air cooler includes an exhaust temperature sensor 11, which is connected to the controller 5 in a circuit. The exhaust temperature sensor 11 is arranged corresponding to the exhaust port of the compressor 1, and the exhaust temperature sensor 11 is used to detect the exhaust temperature of the compressor 1. Based on the exhaust temperature detected by the exhaust temperature sensor 11, the controller 5 precisely controls the speed of the compressor 1, thereby adjusting the cooling capacity of the miniature air cooler and improving the temperature control effect of the miniature air cooler.

[0046] The miniature air cooler has a temperature control point. By adjusting the speed of compressor 1, the temperature of the temperature control point can be maintained within the range of ±0.1℃ of the set value.

[0047] Evaporator 4 includes an evaporator tube, and a reserved copper tube is fitted onto the evaporator 4. A preset cavity is formed between the reserved copper tube and the evaporator tube. The heating tube is set in the preset cavity, and the reserved copper tube, the heating tube and the evaporator tube are arranged in sequence to achieve close contact, good heat exchange, improve defrosting effect and achieve rapid defrosting.

[0048] The precision temperature-controlled mini air cooler includes a display screen 7, which has an operation panel, allowing staff to easily control the precision temperature-controlled mini air cooler.

[0049] Refrigeration system principle: Compressor 1 draws in low-pressure, low-temperature refrigerant gas from evaporator 4, compresses it into high-pressure, high-temperature refrigerant gas, and sends it into condenser 2. Under the action of the fan in condenser 2, the refrigerant exchanges heat with the outside air (heat release), condensing (liquefying) the high-pressure, high-temperature refrigerant gas into high-pressure, room-temperature refrigerant liquid. The high-pressure, room-temperature refrigerant liquid is depressurized through the throttling device (expansion valve / capillary tube) and then enters evaporator 4. Under the action of the fan, the low-pressure liquid refrigerant in evaporator 4 absorbs heat from the outside air (heat absorption) and rapidly boils and evaporates (vaporizes), thereby rapidly reducing the temperature of the air passing through evaporator 4 to achieve the refrigeration effect.

[0050] Condenser 2 fan control principle: The condenser 2 fan is a DC speed-regulating axial fan. An ambient temperature sensor 22 is installed at the air inlet of the condenser 2. The controller 5 detects the air temperature (ambient temperature) at the air inlet of the condenser 2 and adjusts the fan speed according to the temperature range to ensure that the air volume of the condenser fan 21 matches the heat exchange of the condenser 2 to obtain the best heat dissipation performance.

[0051] Evaporator 4 fan control principle: The evaporator 4 fan is a DC speed-regulating centrifugal fan. A cold air temperature sensor 42 is installed at the air outlet of the evaporator 4. The controller 5 detects the air temperature (cold air temperature) at the air outlet of the evaporator 4 and adjusts the speed of the evaporator fan 41 according to the temperature range to ensure that the air volume of the evaporator fan 41 matches the heat exchange capacity of the evaporator 4 to obtain the best cooling performance.

[0052] Evaporator 4 defrosting device control principle: Evaporator 4 adopts electric defrosting. The heating tube is installed in the copper tube reserved in evaporator 4 (tube-fin heat exchanger) to ensure close contact with evaporator 4 and good heat exchange.

[0053] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A precision temperature-controlled miniature air cooler, characterized in that, The device includes a compressor, a condenser, a condenser fan, a throttling device, an evaporator, an evaporator fan, a controller, an ambient temperature sensor, an exhaust temperature sensor, and a cold air temperature sensor. The compressor, the condenser, the condenser fan, the throttling device, the evaporator, the evaporator fan, the ambient temperature sensor, the exhaust temperature sensor, and the cold air temperature sensor are all electrically connected to the controller. The ambient temperature sensor is used to detect the ambient temperature of the condenser, the exhaust temperature sensor is used to detect the exhaust temperature of the compressor, and the cold air temperature sensor is used to detect the outlet air temperature of the evaporator.

2. The precision temperature-controlled miniature air cooler as described in claim 1, characterized in that, The condenser has a condenser air inlet, and the ambient temperature sensor is installed at the condenser air inlet. The ambient temperature sensor is used to feed back the temperature of the condenser air inlet to the controller, and the controller adjusts the speed of the condenser fan based on the data fed back by the ambient temperature sensor.

3. The precision temperature-controlled miniature air cooler as described in claim 2, characterized in that, The controller has a condensing temperature range, and the condensing fan has different speed ranges, with the condensing temperature range corresponding to different speed ranges.

4. The precision temperature-controlled miniature air cooler as described in claim 2, characterized in that, The condenser fan is a DC speed-regulating axial fan.

5. The precision temperature-controlled miniature air cooler as described in any one of claims 1-4, characterized in that, The evaporator has an evaporation outlet, and the cold air temperature sensor is installed at the evaporation outlet. The cold air temperature sensor is used to feed back the temperature of the evaporation outlet to the controller, and the controller adjusts the speed of the evaporation fan based on the data fed back by the cold air temperature sensor.

6. The precision temperature-controlled miniature air cooler as described in claim 5, characterized in that, The controller has an evaporation temperature range, and the evaporation fan has different speed ranges, with each evaporation temperature range corresponding to a different speed range.

7. The precision temperature-controlled miniature air cooler as described in any one of claims 1-4, characterized in that, The precision temperature-controlled miniature air cooler includes a heater, which is assembled with the evaporator and is used to defrost the evaporator. The heater includes a heating tube, and the evaporator has a reserved copper tube, with the heating tube installed inside the reserved copper tube.

8. The precision temperature-controlled miniature air cooler as described in claim 7, characterized in that, The precision temperature-controlled mini air cooler includes a defrost temperature sensor, which is circuitically connected to the controller and assembled with the evaporator. The defrost temperature sensor is used to detect the surface temperature of the evaporator.

9. The precision temperature-controlled miniature air cooler as described in any one of claims 1-4, characterized in that, The throttling device is an expansion valve or a capillary throttling component.

10. The precision temperature-controlled miniature air cooler as described in any one of claims 1-4, characterized in that, The precision temperature-controlled miniature air cooler includes an exhaust temperature sensor, which is electrically connected to the controller and is arranged correspondingly to the exhaust port of the compressor. The exhaust temperature sensor is used to detect the exhaust temperature of the compressor.

Images