Uniform temperature medical cabinet
By employing a refrigeration system combining dual evaporators and natural convection circulation with dual compressors in the medical cabinet, the problems of temperature uniformity, slow cooling speed, and high energy consumption have been solved, achieving a rapid, uniform, and energy-saving cooling effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN COOLINGSTYLE TECH CO LTD
- Filing Date
- 2026-05-14
- Publication Date
- 2026-06-23
AI Technical Summary
Existing medical cabinets are inadequate in terms of temperature uniformity, cooling speed, and energy consumption, and cannot meet the needs of medical research scenarios.
It adopts a dual-evaporator structure and a dual-compressor refrigeration system that combines natural convection circulation. The system is connected in parallel through the first heat exchanger. It utilizes the principle that cold air naturally sinks and hot air naturally rises to form a uniform temperature distribution. When needed, it can double the cooling capacity for rapid cooling. At the same time, the controller can intelligently adjust the operation of the compressor to save energy.
It significantly improves temperature uniformity, increases cooling speed, reduces energy consumption, and enhances operational reliability and stability.
Smart Images
Figure CN224398096U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of refrigeration equipment technology, specifically to a uniform temperature medical cabinet. Background Technology
[0002] In the pharmaceutical and scientific research industries, temperature-sensitive substances such as vaccines, reagents, enzyme preparations, and biological samples need to be stored in refrigeration equipment with precise temperature control capabilities. Medical cabinets, as commonly used equipment in such scenarios, directly affect the activity and stability of the stored substances through their refrigeration performance.
[0003] Existing refrigeration equipment used in pharmaceutical research typically employs a single evaporator combined with a fan for forced convection air circulation. However, this type of refrigeration equipment has the following problems in practical use:
[0004] First, there is poor temperature uniformity. After the cold air is released from the evaporator, it is unevenly distributed inside the chamber, often resulting in areas near the air outlet being too cold, while areas farther away are too hot, creating temperature dead zones. For reagents and samples requiring strict temperature control, this temperature difference can severely affect their activity and stability.
[0005] Secondly, the cooling rate is slow. After the equipment is turned on, the door is opened, or room-temperature items are placed inside, the internal temperature needs to be quickly restored to the set value. Traditional single-compressor refrigeration systems, due to their limited cooling capacity, cannot meet the urgent need for rapid rewarming in medical research scenarios.
[0006] Third, high energy consumption. In order to maintain a stable temperature inside the unit, the compressor of traditional refrigeration equipment needs to start and stop frequently or run at high power for a long time, resulting in high overall energy consumption.
[0007] Therefore, how to provide a medical cabinet that can improve temperature uniformity in the cooling space, increase cooling speed and reduce energy consumption has become a technical problem that urgently needs to be solved in this field. Utility Model Content
[0008] The present invention aims to address the shortcomings of the prior art and provide a medical cabinet that can effectively improve the temperature uniformity of the cooling space, increase the cooling speed, and reduce operating energy consumption.
[0009] To achieve the above objectives, this utility model provides a uniform temperature medical cabinet, including a refrigeration system and a refrigeration space. The refrigeration system is mounted on a supporting structure and located above the refrigeration space. The refrigeration system includes a first compressor, a first condenser, a first throttling device, and a first heat exchanger. The first heat exchanger is composed of a second evaporator and a third evaporator connected in series through pipelines.
[0010] The second evaporator and the third evaporator are arranged opposite to each other, forming a first heat exchange space between them;
[0011] The support structure is provided with a first heat exchange fan located directly below the first heat exchange space, which is used to draw in cold air vertically downwards and blow it into the cooling space.
[0012] Preferably, when the first heat exchange fan is working, the cold air in the cooling space descends from the middle under the action of gravity, and the hot air rises from both sides to the opposite sides of the second evaporator and the third evaporator for heat exchange, so as to form an air circulation.
[0013] Preferably, the first compressor, the first condenser, the first throttling device, and the first heat exchanger are connected in series to form a first refrigeration circuit;
[0014] The refrigeration system further includes: a second compressor, a second condenser, and a second throttling device, wherein the second compressor, the second condenser, the second throttling device, and the first heat exchanger are connected in series to form a second refrigeration circuit;
[0015] The first refrigeration circuit and the second refrigeration circuit are connected in parallel through the first heat exchanger to jointly provide cooling to the first heat exchanger.
[0016] Preferably, it further includes a temperature sensor disposed within the refrigeration space, and a controller electrically connected to the temperature sensor, the first compressor, and the second compressor.
[0017] Preferably, the second evaporator and the third evaporator are tube-plate evaporators or finned evaporators.
[0018] Preferably, the first heat exchange fan is an axial fan or a centrifugal fan.
[0019] Preferably, the second evaporator and the third evaporator are the same size, and the relative distance between the second evaporator and the third evaporator is adapted to the air intake range of the first heat exchange fan.
[0020] Preferably, the first condenser and the second condenser are finned condensers.
[0021] Preferably, the support structure includes a support plate and a support rod, wherein the support plate is used to support the refrigeration system and the support rod is used to support the support plate.
[0022] Preferably, the support plate is provided with a heat dissipation mesh for air circulation.
[0023] Compared with the prior art, the temperature-controlled medical cabinet provided by this utility model has the following beneficial effects:
[0024] 1. Significantly Improved Temperature Uniformity: By incorporating dual evaporators and a fan located directly below them, the structure utilizes the physical principle that denser cold air naturally sinks, creating a natural convection circulation path where cold air descends from the center and hot air rises from the sides. This structure eliminates the need for complex air ducts, ensuring even distribution of cooling energy throughout the refrigerated space, effectively eliminating temperature dead zones and guaranteeing the quality of stored items.
[0025] 2. Significantly improved cooling speed: Two compressors are used to form two refrigeration circuits, which are connected in parallel through a first heat exchanger. During startup or high load phases, both compressors can be started simultaneously via the controller, delivering double the cooling capacity to the first heat exchanger, thereby significantly shortening the cooling time and meeting the requirements for rapid rewarming.
[0026] 3. Effectively Reduced Operating Energy Consumption: During stable operation, one compressor can be shut down via the controller, with only the other compressor maintaining the internal temperature. Simultaneously, the natural convection-assisted air circulation reduces reliance on forced convection, further lowering fan energy consumption and achieving energy-efficient operation.
[0027] 4. Significantly enhanced operational reliability: When one compressor or one refrigeration circuit fails, the other circuit can still maintain normal operation and can be started in time to continue to maintain the temperature of the refrigerated space. This is especially critical for pharmaceutical research scenarios that require long-term, uninterrupted, and highly stable storage. Attached Figure Description
[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.
[0029] Figure 1 This is a schematic diagram of the overall structure of the temperature-controlled medical cabinet according to an embodiment of the present invention.
[0030] Figure 2 This is a schematic diagram of the internal structure of the temperature-controlled medical cabinet according to an embodiment of the present invention.
[0031] Figure 3 This is a schematic diagram of another internal structure of the temperature-controlled medical cabinet according to an embodiment of the present invention.
[0032] Figure 4 This is a cross-sectional view of the temperature-controlled medical cabinet according to an embodiment of the present invention, taken from a top view.
[0033] Figure 5 This is a schematic diagram of the air circulation path of the temperature-controlled medical cabinet according to an embodiment of the present invention.
[0034] Figure label:
[0035] 20. Refrigeration system; 30. Refrigeration space; 40. Support structure; 41. Support plate; 42. Support rod; 43. Heat dissipation mesh; 50. First heat exchanger; 51. Second evaporator; 52. Third evaporator; 53. First heat exchange space; 60. First heat exchange fan; 70. First compressor; 71. First condenser; 80. Second compressor; 81. Second condenser; 90. Temperature sensor; 100. Controller. Detailed Implementation
[0036] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention.
[0037] Reference Figures 1 to 4 This embodiment provides a uniform temperature medical cabinet, including a refrigeration system 20 and a refrigeration space 30. The refrigeration system 20 is mounted on a support structure 40. The refrigeration space 30 is a sealed box for storing reagents, samples, and other items, and may have shelves inside (not shown in the figure). The refrigeration system 20 is located above the refrigeration space 30.
[0038] The refrigeration system 20 includes a first compressor 70, a first condenser 71, a first throttling device (not shown in the figure), and a first heat exchanger 50. The first compressor 70, the first condenser 71, the first throttling device, and the first heat exchanger 50 are connected in series via pipes to form a first refrigeration circuit. These are all conventional components of a refrigeration system, and the refrigeration cycle can be completed by connecting them through pipes. The first heat exchanger 50 is composed of a second evaporator 51 and a third evaporator 52 connected in series via pipes. The second evaporator 51 and the third evaporator 52 are arranged opposite to each other, forming a first heat exchange space 53 between them. The second evaporator 51 and the third evaporator 52 can be tube-plate evaporators or finned evaporators. Preferably, the second evaporator 51 and the third evaporator 52 are evaporators of the same size and model, and the relative distance between them is adapted to the air intake range of the first heat exchange fan 60 so that the first heat exchange fan 60 can effectively draw cold air downwards into the first heat exchange space 53.
[0039] A first heat exchange fan 60 is positioned directly below the first heat exchange space 53 on the support structure 40, for drawing in cold air vertically downwards and blowing it into the refrigeration space 30. Specifically, the support structure 40 includes a support plate 41 and a support rod 42, the support plate 41 for supporting the refrigeration system 20, and the support rod 42 for supporting the support plate 41.
[0040] A heat dissipation mesh 43 is also provided on the support plate 41. The heat dissipation mesh 43 is located in the area below the back side of the second evaporator 51 and the third evaporator 52, and is used to allow the rising hot air to reach the back side of the second evaporator 51 and the third evaporator 52 through the support plate 41 for heat exchange.
[0041] Optionally, the first heat exchange fan 60 is an axial fan or a centrifugal fan.
[0042] See Figure 1 and Figure 2 To achieve both rapid cooling and energy-saving operation, the refrigeration system 20 of this embodiment, in addition to the first refrigeration circuit formed by the first compressor 70, the first condenser 71, the first throttling device, and the first heat exchanger 50 connected in series via pipelines, also includes: a second compressor 80, a second condenser 81, and a second throttling device (not shown in the figure). The second compressor 80, the second condenser 81, the second throttling device, and the first heat exchanger 50 are connected in series via pipelines to form a second refrigeration circuit. The first throttling device and the second throttling device can be capillary tubes or electronic expansion valves, which are not specifically shown in the figures, but their placement and connection method can be understood by those skilled in the art.
[0043] The first and second refrigeration circuits are connected in parallel via the first heat exchanger 50. Specifically, the high-temperature, high-pressure gaseous refrigerant discharged from the first compressor 70 and the second compressor 80 is condensed by the first condenser 71 and the second condenser 81, respectively, and after being throttled by the first and second throttling devices, enters the second evaporator 51 and the third evaporator 52 of the first heat exchanger 50, respectively. Both circuits jointly provide cooling capacity to the first heat exchanger 50, thus providing double the cooling capacity during startup or high-load phases, achieving rapid cooling. Furthermore, during long-term operation, if a compressor in operation or its associated refrigeration circuit fails due to unforeseen circumstances, the controller 100 can quickly detect temperature fluctuations through the temperature data transmitted from the temperature sensor 90 and immediately start another compressor in standby mode, ensuring uninterrupted operation of the refrigeration system 20. Optionally, the first condenser 71 and the second condenser 81 can be finned condensers.
[0044] See Figure 2To achieve automatic control of the refrigeration system 20, the medical cabinet in this embodiment also includes a temperature sensor 90 disposed within the refrigeration space 30, and a controller 100 electrically connected to the temperature sensor 90, the first compressor 70, and the second compressor 80. The temperature sensor 90 is used to detect the temperature within the refrigeration space 30 in real time and sends the temperature signal to the controller 100. Based on the temperature data returned by the temperature sensor 90, the controller 100 outputs a start signal or a stop signal to the first compressor 70 and the second compressor 80. For example, at the initial stage of the medical cabinet startup or after the cabinet door is opened, the temperature within the refrigeration space 30 is high, and the controller 100 simultaneously outputs a start signal, causing both the first compressor 70 and the second compressor 80 to start running, achieving rapid cooling with maximum cooling capacity. When the temperature sensor 90 detects that the temperature within the refrigeration space 30 has reached a set value and stabilized, the controller 100 outputs a stop signal to one of the compressors, keeping only the other compressor running to maintain the temperature of the refrigeration space 30, thereby achieving energy-saving operation.
[0045] See Figure 5 The working principle of this utility model is as follows: After the refrigeration system 20 is started, the first heat exchange fan 60 draws the cold air in the first heat exchange space 53 vertically downwards and blows it into the refrigeration space 30. Due to the higher density of the cold air, the cold air entering the refrigeration space 30 naturally descends under the action of gravity and is evenly distributed in the lower middle part of the refrigeration space 30. It exchanges heat with the stored items and absorbs heat. After the cold air cools the items in the refrigeration space 30, its temperature rises and it becomes hot air. The hot air has a lower density and naturally rises from both sides of the refrigeration space 30 under the action of pressure difference. It passes through the heat dissipation mesh 43 on the support plate 41 and reaches the space on the opposite side of the second evaporator 51 and the third evaporator 52. It exchanges heat with the second evaporator 51 and the third evaporator 52, is cooled again, and then re-enters the first heat exchange space 53, thus forming a complete air circulation. The arrows in the figure represent the direction of the cold and hot air circulation. This circulation method does not require an additional air duct to achieve uniform temperature in the refrigeration space 30.
[0046] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the protection scope of this utility model.
Claims
1. A uniform temperature medical cabinet, comprising a refrigeration system (20) and a refrigeration space (30), wherein the refrigeration system (20) is disposed on a supporting structure (40), characterized in that, The refrigeration system (20) is located above the refrigeration space (30). The refrigeration system (20) includes a first compressor (70), a first condenser (71), a first throttling device, and a first heat exchanger (50). The first heat exchanger (50) is composed of a second evaporator (51) and a third evaporator (52) connected in series through pipelines. The second evaporator (51) and the third evaporator (52) are arranged opposite to each other, forming a first heat exchange space (53) between them. The support structure (40) is provided with a first heat exchange fan (60) located directly below the first heat exchange space (53) for drawing cold air vertically downward and blowing it into the cooling space (30).
2. The temperature-controlled medical cabinet according to claim 1, characterized in that, When the first heat exchange fan (60) is working, the cold air in the cooling space (30) descends from the middle under the action of gravity, and the hot air rises from both sides to the opposite sides of the second evaporator (51) and the third evaporator (52) for heat exchange, so as to form an air circulation.
3. The temperature-controlled medical cabinet according to claim 1, characterized in that, The first compressor (70), the first condenser (71), the first throttling device and the first heat exchanger (50) are connected in series to form a first refrigeration circuit; The refrigeration system (20) further includes: a second compressor (80), a second condenser (81), and a second throttling device. The second compressor (80), the second condenser (81), and the second throttling device are connected in series with the first heat exchanger (50) to form a second refrigeration circuit. The first refrigeration circuit and the second refrigeration circuit are connected in parallel through the first heat exchanger (50) to jointly provide cooling capacity to the first heat exchanger (50).
4. The temperature-controlled medical cabinet according to claim 3, characterized in that, It also includes a temperature sensor (90) disposed in the refrigeration space (30), and a controller (100) electrically connected to the temperature sensor (90), the first compressor (70) and the second compressor (80).
5. The temperature-controlled medical cabinet according to claim 1, characterized in that, The second evaporator (51) and the third evaporator (52) are tube sheet evaporators or finned evaporators.
6. The temperature-controlled medical cabinet according to claim 1, characterized in that, The first heat exchange fan (60) is an axial fan or a centrifugal fan.
7. The temperature-controlled medical cabinet according to claim 1, characterized in that, The second evaporator (51) and the third evaporator (52) are the same size, and the relative distance between the second evaporator (51) and the third evaporator (52) is adapted to the air intake range of the first heat exchange fan (60).
8. The temperature-controlled medical cabinet according to claim 3, characterized in that, The first condenser (71) and the second condenser (81) are finned condensers.
9. The temperature-controlled medical cabinet according to claim 1, characterized in that, The support structure (40) includes a support plate (41) and a support rod (42). The support plate (41) is used to support the refrigeration system (20), and the support rod (42) is used to support the support plate (41).
10. The temperature-controlled medical cabinet according to claim 9, characterized in that, The support plate (41) is provided with a heat dissipation mesh (43) for air circulation.