Load simulator for maximum average load rate test of medical temperature control blanket

Abstract

A load simulator for a medical temperature control blanket load maximum average rate test mainly structurally comprises a metal water tank, a water circulation unit, a heating unit, a temperature measuring unit and a controller unit. The utility model provides a load simulator, which is used for a maximum average load rate test of a medical temperature control blanket, and ensures that the temperature of water in the simulator is uniform by controlling the operation of a circulating pump. The temperature of water in the simulator is measured in real time through a preset multi-point temperature sensor, and accurate control over the water temperature is carried out.

Description

TECHNICAL FIELD

[0001] The utility model belongs to medical temperature control blanket load maximum average rate test load simulator, relates to medical temperature control blanket quality detection field. BACKGROUND

[0002] The step that the medical temperature control blanket loading simulation load carries out refrigeration and heating test is given in 6.2.4 load maximum average rate test of medical temperature control blanket of the People's Republic of China pharmaceutical industry standard YY0952-2015 " medical temperature control blanket " is: a) simulation load inside water temperature preheats to 36.5 DEG C ± 0.5 DEG C, first the circulating liquid temperature pre-processing to the lowest temperature that can be set or the temperature that manufacturer specifies, running refrigeration mode, measurement time is not less than 4h, the difference of the average value of 5-point temperature before and after test is calculated, divided by measurement time, it is load maximum average rate, should comply with the range that manufacturer specified;B) simulation load inside water temperature preheats to 30.0 DEG C ± 0.5 DEG C, first the circulating liquid temperature pre-processing to the highest temperature that can be set or the temperature that manufacturer specifies, running heating mode, measurement time is not less than 4h, the difference of the average value of 5-point temperature before and after test is calculated, divided by measurement time, it is load maximum average rate, should comply with the range that manufacturer specified. CONTENT

[0003] Based on the above situation, the utility model provides a kind of load simulator for medical temperature control blanket load maximum average rate test, the temperature of water in simulator is guaranteed uniform by controlling the work of circulating pump;The temperature of water in simulator is measured in real time by presetting multiple-point temperature sensor, and the accurate control of water temperature is carried out.

[0004] To achieve the above goal, the utility model adopts the following technical scheme: a kind of medical temperature control blanket load maximum average rate test load simulator, on structure mainly including metal water tank, water circulation unit, heating unit, temperature measuring unit and controller unit, the metal water tank as circulating water carrier, outer surface is smooth, all metal surfaces except bottom are coated with heat preservation material, as the shell of the load simulator;The water circulation unit is mixed with water in metal water tank by circulating pump;The heating unit is used to provide heating heat source, and the water in the metal water tank is heated by electric heater;The temperature measuring unit is arranged in the metal water tank, and is used to measure the temperature of water in the metal water tank;The controller unit controls the whole device work, and the water circulation unit, heating unit, temperature measuring unit have electrical connection, the temperature of the temperature measuring unit is collected, heating unit is controlled to heat, and water circulation unit is driven to work.

[0005] The metal water tank is provided with a water inlet, a water outlet, a heating unit mounting hole, a drain, a water injection port and a temperature measuring device mounting hole. The water inlet and the water outlet are used to install a circulating pump pipe of a water circulating unit. The heating unit mounting hole is used to install an electric heater of a heating unit. The drain is arranged on the side of the metal water tank and is provided with a valve. The water injection port and the temperature measuring device mounting hole are arranged in the upper cover of the metal water tank.

[0006] The metal water tank is a rectangular box body, and a flow guide plate is further arranged inside. The flow guide plate is a metal rectangular plate, the width of which is adapted to the depth of the metal water tank, and the length of which is shorter than the width of the metal water tank. The flow guide plate is welded and fixed in parallel to the front and rear of the width of the metal water tank and staggered left and right. Specifically, a first flow guide plate is welded and fixed to the left side wall and the bottom of the metal water tank, a second flow guide plate is welded and fixed to the right side wall and the bottom of the metal water tank, and the third, fourth, fifth, sixth and seventh flow guide plates are welded and fixed in sequence from front to back and staggered left and right, so as to increase the travel of circulating water in the tank.

[0007] The temperature measuring unit mainly includes six temperature sensors. The temperature sensors are submerged temperature sensors, which are installed on the upper cover of the metal water tank and submerged in water with the end 30mm away from the bottom of the metal water tank. Specifically, temperature sensor one, temperature sensor two, temperature sensor three, temperature sensor four, temperature sensor five are installed on the upper cover of the metal water tank at the positions of the three equal parts of the diagonal line of the rectangular metal water tank, vertically downward, and one temperature sensor is installed at the intersection point. Temperature sensor six is installed close to the intersection point temperature sensor.

[0008] The controller unit mainly comprises a data acquisition processing module, a relay driving module, a temperature controller module, a microprocessor module, a display output module and a power supply module, the data acquisition processing module is used for collecting temperature values of temperature sensors one, two, three, four and five measured by the temperature measuring unit and connecting input ports of the microprocessor module; the relay driving module mainly comprises a direct current control direct current relay and a direct current control alternating current relay, and is used for driving the water circulating unit and the heating unit to work respectively; the temperature controller module collects a temperature value of a temperature sensor six and sends the temperature value to the microprocessor module for judgment, and waits for a command of the microprocessor module to drive the direct current control alternating current relay to control the heating unit to work; the microprocessor module drives the direct current control direct current relay to drive the circulating pump to work; the display output module displays the temperature values of the temperature sensors one, two, three, four and five collected by the microprocessor module; and the power supply module completes voltage conversion and is used for supplying power to the water circulating unit, the heating unit, the temperature measuring unit, the data acquisition processing module, the relay driving module, the temperature controller module, the microprocessor module and the display output module.

[0009] The load simulator is used for a medical temperature control blanket load maximum average rate test, and has the following remarkable effects: 1. water circulating units are used to fully mix circulating water, so that the temperature of water in the simulator is uniform; and 2. a temperature measuring unit composed of multiple temperature sensors is used to measure the temperature of water in the simulator in real time, so that the water temperature is accurately controlled. BRIEF DESCRIPTION OF DRAWINGS

[0010] The utility model makes further detailed description in combination with the drawings.

[0011] Figure 1 It is the structure schematic drawing of the utility model;

[0012] Figure 2 It is the structure schematic drawing of the utility model without top heat preservation shell;

[0013] Figure 3 It is the structure schematic drawing of the utility model without top heat preservation shell from another angle;

[0014] Figure 4 It is the installation grid schematic drawing of temperature sensor one-5 of the utility model;

[0015] Figure 5 It is the circuit structure block diagram of the utility model;

[0016] Figure 1 、 2, 3: 1, metal water tank; 2, controller unit; 3, top heat preservation shell; 4, side heat preservation shell; 5, heating unit; 6, heating unit mounting hole; 7, circulating pump; 8, water inlet; 9, water outlet; 10, water filling port; 11, water discharge port; 12, flow guide plate; 13, upper cover; 14, temperature sensor one; 15, temperature sensor two; 16, temperature sensor five; 17, temperature sensor six; 18, temperature sensor three; 19, temperature sensor four; 20, handle; 21, temperature measurement unit mounting hole. DETAILED DESCRIPTION

[0017] The utility model will be specifically introduced below in combination with the drawings and specific embodiments.

[0018] As shown in Figure 1 , 2 , 3, a load simulator for medical temperature control blanket maximum average rate test, in structure mainly includes metal water tank (1), water circulation unit, heating unit (5), temperature measurement unit and controller unit (2), the metal water tank (1) as circulating water carrier, the outer surface is even, all metal surfaces except the bottom are covered with heat preservation material, as the shell body of the load simulator, the water circulation unit is mixed with the water in the metal water tank (1) by circulating pump (7), the heating unit (5) is used to provide heating source, and the water in the metal water tank (1) is heated by electric heater, the temperature measurement unit is arranged in the metal water tank (1), and the temperature of the water in the metal water tank (1) is measured, the controller unit (2) controls the whole device to work, and the water circulation unit, heating unit (5) and temperature measurement unit are electrically connected, the temperature of the temperature measurement unit is collected, the heating unit (5) is controlled to heat, and the water circulation unit is driven to work.

[0019] As shown in Figure 1 , 2 , 3, the metal water tank (1) is made of 304 stainless steel, and the effective length, width and height are 610*520*200mm, the metal wall thickness of the tank body is 3mm, seven flow guide plates (12) are arranged in the water tank, the flow guide plate (12) is a 304 stainless steel rectangular plate, the width is adapted to the depth of the metal water tank (1), the length is slightly shorter than the width of the metal water tank (1), and the first flow guide plate is welded to the left side wall and the bottom of the metal water tank (1) and fixed, the second flow guide plate is welded to the right side wall and the bottom of the metal water tank (1) and fixed, the third, fourth, fifth, sixth and seventh flow guide plates are sequentially and equidistantly welded and fixed from front to back and left to right, so that the travel of circulating water in the tank is increased.

[0020] As shown in Figure 2 ,3 The metal water tank (1) shown also has a water inlet (8), a water outlet (9), a heating unit mounting hole (6), a drain (11), a water inlet (10), and a temperature measuring device mounting hole (21). The water inlet (8) and the water outlet (9) are used to install the circulating pump (7) pipe of the water circulation unit; the heating unit mounting hole (6) is used to install the electric heater of the heating unit (5); the drain (11) is arranged on the side of the metal water tank (1) and is provided with a valve; the water inlet (10) and the temperature measuring device mounting hole (21) are arranged in the upper cover (13) of the metal water tank (1).

[0021] As shown in Figure 1 , 2 , the metal water tank (1) also has a side heat preservation shell (4) and a top heat preservation shell (3). The side heat preservation shell (4) and the top heat preservation shell (3) are both made of acrylic. The side heat preservation shell (4) has four sides that match and are fixedly connected to the four sides of the metal water tank (1). The top heat preservation shell (3) is designed in a separate cover shape, which facilitates water tank water filling and drainage operation. The side heat preservation shell (4) and the top heat preservation shell (3) are also provided with heat preservation materials inside. The heat preservation materials are selected from foamed glass, and the thickness of the heat preservation material on each side is greater than 100 mm.

[0022] As shown in Figure 2 , 3 , the temperature measuring unit mainly includes six temperature sensors. The temperature sensors are selected from immersion type temperature sensors, are installed on the upper cover (13) of the metal water tank (1), are immersed in water downward, and have a terminal that is 30 mm away from the bottom of the metal water tank (1). Specifically, temperature sensor one (14), temperature sensor two (15), temperature sensor three (18), temperature sensor four (19), and temperature sensor five (16) are installed on the upper cover (13) of the metal water tank (1) according to the diagonal line of the rectangular metal water tank, are vertically downward at positions that are evenly divided into three parts, and have a temperature sensor five (16) installed at the intersection point. Temperature sensor six (17) is installed close to the intersection temperature sensor five (16).

[0023] The controller unit (2) mainly comprises a data acquisition processing module, a relay driving module, a temperature controller module, a microprocessor module, a display output module and a power supply module. The data acquisition processing module is used to acquire the temperature values of the temperature sensor one (14), the temperature sensor two (15), the temperature sensor three (18), the temperature sensor four (19) and the temperature sensor five (16) measured by the temperature measuring unit and connect the input port of the microprocessor module; the relay driving module mainly comprises a direct current control direct current relay 1 and a direct current control alternating current relay 2, which are respectively used to drive the water circulating unit and the heating unit (5) to work; the temperature controller module acquires the temperature value of the temperature sensor six (17) and sends it to the microprocessor module for judgment, and waits for the command of the microprocessor module to drive the relay 2 to control the working of the heating unit (5); the microprocessor module drives the relay 1 to drive the circulating pump (7) to work; the display output module displays the temperature values of the temperature sensor one (14), the temperature sensor two (15), the temperature sensor three (18), the temperature sensor four (19) and the temperature sensor five (16) acquired by the microprocessor module; and the power supply module completes the conversion of voltage and is used to supply power to the water circulating unit, the heating unit (5), the temperature measuring unit, the data acquisition processing module, the relay driving module, the temperature controller module, the microprocessor module and the display output module.

[0024] Preferably, the electric heater is a 2KW, 220V alternating current electric heater, which can heat the circulating water from room temperature 20℃ to 36.5℃ within 30 minutes; the temperature sensor of the temperature measuring unit is an immersion type RTD (PT100, A level precision (±0.15℃)); the circulating water pump of the water circulating unit has a flow of 6L / min, an inlet diameter of 16mm, an outlet diameter of 14mm and adopts direct current 24V power supply; the microprocessor model is STM32f103CBT6; the temperature controller module model is AI-719FGGS; the relay 1 model is a direct current control direct current solid state relay GKD6132; and the relay 2 model is a direct current control alternating current solid state relay ssr-40DA10A.

[0025] As shown in the load simulator of Figure 1 , 2 , 3, 4, when the maximum average rate test of the medical temperature control blanket is carried out, the specific process is as follows:

[0026] 1) The measured temperature control blanket is placed on a pine board with an area not less than the blanket surface and a thickness not less than 20mm, and the load simulator is placed on the measured medical temperature control blanket to contact with the possible maximum contact area;

[0027] 2) open the top insulation shell (3) of the load simulator, inject water into the metal water tank (1) through the water pipe connected to the water injection port (10), with a mass of 50 kg ± 1 kg, after the water injection is completed, remove the water pipe, and cover the top insulation shell (3);

[0028] 3) The microprocessor module controls relay 1 to drive the circulating pump (7) of the water circulation unit to work; and controls relay 2 to drive the electric heater provided in the heating unit (5) to work through the temperature controller module;

[0029] 4) Refrigeration mode test:

[0030] a) The temperature controller module reads the temperature value of the temperature sensor six (17) provided in the temperature measurement unit, and uploads the microprocessor module through 485 communication; the data acquisition and processing module collects the temperature values of the temperature sensor one (14), the temperature sensor two (15), the temperature sensor three (18), the temperature sensor four (19), and the temperature sensor five (16) and uploads the microprocessor module;

[0031] The microprocessor module controls the temperature controller module to drive the relay 2 to control the electric heater to start and stop work by comparing whether the temperature values collected by the six temperature sensors all reach the preset temperature threshold 36.5℃±0.5℃;

[0032] b) The circulating liquid temperature of the measured medical temperature control blanket is pre-processed to a settable minimum temperature or a temperature specified by the manufacturer, the refrigeration mode is run, the measurement time is not less than 4h, the microprocessor module reads the temperature values of the temperature sensor one (14), the temperature sensor two (15), the temperature sensor three (18), the temperature sensor four (19), and the temperature sensor five (16) provided in the temperature measurement unit and displays them through the display output module, the operator manually records the temperature values, and calculates the difference of the 5-point temperature average value before and after the test, divided by the measurement time, which is the maximum average rate of the load, which should meet the range specified by the manufacturer;

[0033] 5) Heating mode test:

[0034] a) The temperature controller module reads the temperature value of the temperature sensor six (17) provided in the temperature measurement unit, and uploads the microprocessor module through 485 communication; the data acquisition and processing module collects the temperature values of the temperature sensor one (14), the temperature sensor two (15), the temperature sensor three (18), the temperature sensor four (19), and the temperature sensor five (16) and uploads the microprocessor module;

[0035] The microprocessor module controls the temperature controller module to drive the relay 2 to control the electric heater to start and stop work by comparing whether the temperature values collected by the six temperature sensors all reach the preset temperature threshold 30.0℃±0.5℃;

[0036] b) The measured medical temperature control blanket circulating liquid temperature is pre-processed to the highest temperature that can be set or the temperature specified by the manufacturer, the heating mode is run, the measurement time is not less than 4h, the microprocessor module reads the temperature values of the temperature sensor one (14), the temperature sensor two (15), the temperature sensor three (18), the temperature sensor four (19), and the temperature sensor five (16) provided with the temperature measurement unit and displays them through the display output module, the operator manually records the temperature values, and calculates the difference between the average temperature values of the five points before and after the test, divided by the measurement time, which is the maximum average rate of the load, which should meet the range specified by the manufacturer.

[0037] The basic principle, main features and advantages of the present application are shown and described above. Those skilled in the art should understand that the above examples do not limit the present application in any form, and any technical solution obtained by equivalent replacement or equivalent transformation falls within the protection scope of the present application.

Claims

1. A load simulator for testing the maximum average rate of load on a medical temperature-controlled blanket, characterized in that, Structurally, the device mainly comprises a metal water tank, a water circulation unit, a heating unit, a temperature measurement unit, and a controller unit. The metal water tank serves as the circulating water carrier, with a flat outer surface. Except for the bottom, all metal surfaces are covered with insulation material, forming the outer shell of the load simulator. The water circulation unit uses a circulation pump to thoroughly mix the water in the metal water tank. The heating unit provides a heat source for heating the water in the metal water tank using an electric heater. The temperature measurement unit is located inside the metal water tank and measures the temperature of the water. The controller unit controls the operation of the entire device and is electrically connected to the water circulation unit, heating unit, and temperature measurement unit. It collects the temperature readings from the temperature measurement unit, controls the heating unit to heat the water, and drives the water circulation unit to operate.

2. The load simulator for testing the maximum average rate of load on a medical temperature-controlled blanket according to claim 1, characterized in that, The metal water tank is provided with an inlet, an outlet, a heating unit mounting hole, a drain outlet, a water inlet, and a temperature measuring device mounting hole. The inlet and outlet are used to install the circulation pump pipe of the water circulation unit. The heating unit mounting hole is used to install the electric heater of the heating unit. The drain outlet is located on the side of the metal water tank and is equipped with a valve. The water inlet and the temperature measuring device mounting hole are located inside the top cover of the metal water tank.

3. The load simulator for testing the maximum average rate of load on a medical temperature-controlled blanket according to claim 1, characterized in that, The metal water tank is a rectangular box with internal guide plates. The guide plates are rectangular metal plates with a width adapted to the depth of the metal water tank and a length shorter than the width of the metal water tank. They are welded and fixed parallel to the wide side of the metal water tank at equal distances front to back and staggered left to right. Specifically, the first guide plate is welded and fixed to the left side wall and bottom of the metal water tank, the second guide plate is welded and fixed to the right side wall and bottom of the metal water tank, and the third, fourth, fifth, sixth, and seventh guide plates are welded and fixed sequentially at equal distances front to back and staggered left to right to increase the travel distance of the circulating water in the tank.

4. A load simulator for testing the maximum average rate of load on a medical temperature-controlled blanket according to claim 1, characterized in that, The temperature measurement unit mainly includes six temperature sensors. The sensors are immersion temperature sensors, which are installed on the metal water tank cover and submerged in water, with their ends 30mm from the bottom of the metal water tank. Specifically, temperature sensors one, two, three, four, and five are installed on the metal water tank cover at three equal parts along the diagonal of the rectangular metal water tank, vertically downward, with a temperature sensor installed at the intersection point. Temperature sensor six is ​​installed near the intersection point.

5. A load simulator for testing the maximum average rate of load on a medical temperature-controlled blanket according to claim 1, characterized in that, The controller unit mainly includes a data acquisition and processing module, a relay driver module, a temperature controller module, a microprocessor module, a display output module, and a power supply module. The data acquisition and processing module collects temperature values ​​from temperature sensors 1, 2, 3, 4, and 5 measured by the temperature measurement unit and connects them to the input port of the microprocessor module. The relay driver module mainly includes a DC-controlled DC relay and a DC-controlled AC relay, used to drive the water circulation unit and the heating unit, respectively. The temperature controller module collects the temperature value from temperature sensor 6 and sends it to the microprocessor module for judgment, waiting for the microprocessor module's command to drive the DC-controlled AC relay to control the heating unit. The microprocessor module drives the DC-controlled DC relay to drive the circulation pump. The display output module displays the temperature values ​​collected by the microprocessor module from temperature sensors 1, 2, 3, 4, and 5. The power supply module performs voltage conversion to supply power to the water circulation unit, heating unit, temperature measurement unit, data acquisition and processing module, relay driver module, temperature controller module, microprocessor module, and display output module.

6. A load simulator for testing the maximum average rate of load on a medical temperature-controlled blanket according to claim 1, characterized in that, The metal water tank is also equipped with side insulation shells and a top insulation shell, both of which are made of acrylic. There are four side insulation shells, which match and are fixedly connected to the four sides of the metal water tank. The top insulation shell has an independent cover design, which facilitates the filling and draining of the water tank. The side insulation shells and the top insulation shell are also equipped with insulation material inside, which is made of foam glass, and the thickness of the insulation material on each side is greater than 100mm.

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