CN108287083A - A kind of accurate temperature control water end system of washing machine performance test station - Google Patents

Abstract

It is disclosed by the invention to belong to water system technical field, specially a kind of accurate temperature control water end system of washing machine performance test station, including constant-temperature hot water branch pipe, hot water check valve is installed on the pipeline of the constant-temperature hot water branch pipe, the left end of the constant-temperature hot water branch pipe and the upper end water inlet of electric T-shaped valve connect, the lower end water inlet of the electric T-shaped valve is connected with constant temperature cold water branch pipe, cold water check valve is installed on the pipeline of the constant temperature cold water branch pipe, the left end water outlet of the electric T-shaped valve is connected with water-supply-pipe, temperature sensor is installed on the pipeline of the water-supply-pipe, this programme disclosure satisfy that the water requirements of output relevant temperature, by separately providing different supply water temperatures, so that this programme station end, which is supplied water, can be independently applicable to most performance tests.

Description

A washing machine performance test station precise temperature control water supply terminal system

technical field

The invention relates to the technical field of water supply systems, in particular to a washing machine performance testing station precise temperature control water supply terminal system.

Background technique

At present, the water supply system for washing machine performance testing generally includes two water supply channels, one of which is constant temperature cold water, and the other is constant temperature hot water. The temperature of cold water is usually 15°C. Water temperature requirements are also different, involving temperatures including 30°C, 40°C, 55°C, 60°C, etc., so once the constant temperature hot water temperature is set to one temperature, the test station will not be able to test products that require other hot water temperatures.

For laboratories with many different types of test samples, such a water supply system will seriously restrict the test efficiency and capacity of the laboratory, and waste test resources to a certain extent. Therefore, we propose a water supply with precise temperature control for washing machine performance test stations end system.

Contents of the invention

The purpose of the present invention is to provide a washing machine performance testing station precise temperature control water supply terminal system to solve the laboratory with many different types of test samples proposed in the background technology. Such a water supply system will seriously restrict the test efficiency of the laboratory. And ability, to a certain extent, the problem of wasting test resources.

In order to achieve the above object, the present invention provides the following technical solutions: a washing machine performance testing station precision temperature control water supply terminal system, including a constant temperature hot water branch pipe, a hot water check valve is installed on the pipeline of the constant temperature hot water branch pipe, so The left end of the constant temperature hot water branch pipe is connected to the upper water inlet of the electric three-way valve, and the lower end water inlet of the electric three-way valve is connected to a constant temperature cold water branch pipe, and a cold water check valve is installed on the pipeline of the constant temperature cold water branch pipe. The water outlet at the left end of the electric three-way valve is connected with a water delivery pipe, a temperature sensor is installed on the pipeline of the water delivery pipe, a pressure transmitter is installed at the left end of the water delivery pipe, and the output port of the temperature sensor communicates with the The input port of the PID control temperature control meter is connected, the output port of the PID control temperature control meter is connected with the input port of the electric three-way valve through a data line, and the left end of the pressure transmitter is connected with an outlet pipe, and the outlet pipe The bottom of the tank is connected with a return pipe through a flange, and a shut-off valve is installed on the pipeline of the return pipe.

Preferably, the constant-temperature hot water branch pipe satisfies water temperature output of 30°C, 40°C, 55°C, and 60°C.

Preferably, the electric three-way valve includes a three-way valve and a servo motor, the output end of the servo motor is connected to the control knob of the three-way valve, the control circuit port of the servo motor is connected to the output port of the PID control temperature control meter Connect via data cable.

Preferably, the temperature sensor is a TR/02015 thermal resistance temperature sensor.

Preferably, the pressure transmitter is a liquid crystal display pressure transmitter.

Preferably, the shut-off valve is a manual shut-off valve.

Compared with the prior art, the beneficial effect of the present invention is that the solution can meet the water supply demand of corresponding output temperature, and by independently providing different water supply temperatures, the water supply at the station end of the solution can be independently applied to most performance tests.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a schematic diagram of the PID control of the PID control temperature control table of the present invention.

In the figure: 1 constant temperature hot water branch pipe, 2 hot water one-way valve, 3 electric three-way valve, 4 constant temperature cold water branch pipe, 5 cold water one-way valve, 6 water delivery pipe, 7 temperature sensor, 8 PID control temperature control meter, 9 pressure Transmitter, 10 outlet pipe, 11 return pipe, 12 stop valve.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Please refer to Figures 1-2, the present invention provides a technical solution: a precise temperature control water supply terminal system for washing machine performance testing stations, including a constant temperature hot water branch pipe 1, and a hot water one-way pipe is installed on the constant temperature hot water branch pipe 1 Valve 2, the left end of the constant temperature hot water branch pipe 1 is connected to the upper water inlet of the electric three-way valve 3, and the lower end water inlet of the electric three-way valve 3 is connected to the constant temperature cold water branch pipe 4, and a cold water one-way pipe is installed on the constant temperature cold water branch pipe 4. Valve 5, the water outlet at the left end of the electric three-way valve 3 is connected with a water delivery pipe 6, a temperature sensor 7 is installed on the pipeline of the water delivery pipe 6, a pressure transmitter 9 is installed at the left end of the water delivery pipe 6, and the output port of the temperature sensor 7 passes through The data line is connected to the input port of the PID control temperature control meter 8, the output port of the PID control temperature control meter 8 is connected to the input port of the electric three-way valve 3 through the data line, and the left end of the pressure transmitter 9 is connected to the water outlet pipe 10, The bottom of the outlet pipe 10 is connected with a return pipe 11 through a flange, and a stop valve 12 is installed on the pipeline of the return pipe 11 .

Among them, the constant temperature hot water branch pipe 1 meets the water temperature output of 30°C, 40°C, 55°C, and 60°C. The electric three-way valve 3 includes a three-way valve and a servo motor. The output end of the servo motor is connected to the control knob of the three-way valve. The control circuit port of the servo motor is connected to the output port of the PID control temperature control meter 8 through a data line, the temperature sensor 7 is a TR/02015 thermal resistance temperature sensor, the pressure transmitter 9 is a liquid crystal display pressure transmitter, and the stop valve 12 It is a manual shut-off valve.

Working principle: PID control temperature control table 8 adopts UT55A temperature control table, set temperature parameters through PID control temperature control table 8, enter constant temperature hot water and constant temperature cold water through constant temperature hot water branch pipe 1 and constant temperature cold water branch pipe 4, constant temperature hot water and constant temperature The constant temperature cold water enters the water delivery pipe 6 through the electric three-way valve 3, the temperature sensor 7 measures the temperature of the water in the water delivery pipe 6, and outputs the measured temperature value to the PID control temperature control meter 8 in the form of an electrical signal, and the PID control temperature control Table 8 compares the received electrical signal with the preset temperature value. If the measured value is greater than the set value, the PID control temperature control table 8 controls the switch of the three-way valve 3 through the servo motor of the electric three-way valve 3 to regulate The ratio of cold and hot water output, increase the outflow of cold water, reduce the outflow of hot water, thereby reducing the outlet water temperature of the electric three-way valve 3, if the measured value is less than the set value, reversely adjust the three-way valve of the electric three-way valve 3 switch to reduce the outflow of cold water and increase the outflow of hot water until the measured temperature value is equal to the set temperature value, and the pressure of the water flow in the water delivery pipe 6 is measured through the pressure transmitter 9, and the pressure value is passed through the pressure transmitter 9 The display shows that the displayed measured pressure value is compared with the required water pressure value. If the measured value is greater than the required water pressure value, the return water flow in the return pipe 11 is increased by adjusting the stop valve 12, increasing the pressure loss of the pipeline. , reduce the water supply pressure, if the measured value is less than the required water pressure value, by adjusting the shut-off valve 12, the flow rate of the return water in the return pipe 11 is reduced, the pressure loss of the pipeline is reduced, and the water supply pressure is increased, so that the water in the outlet pipe 10 If the water pressure value and the required pressure value fluctuate within the required range, the water pressure and temperature flowing out of the water outlet pipe 10 are the water pressure and temperature required for the test.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications and substitutions can be made to these embodiments without departing from the principle and spirit of the present invention. and modifications, the scope of the invention is defined by the appended claims and their equivalents.

Claims (6)

1. a kind of accurate temperature control water end system of washing machine performance test station, including constant-temperature hot water branch pipe (1), feature exists In：Hot water check valve (2) is installed on the pipeline of the constant-temperature hot water branch pipe (1), the left end of the constant-temperature hot water branch pipe (1) with The upper end water inlet connection of electric T-shaped valve (3), the lower end water inlet of the electric T-shaped valve (3) are connected with constant temperature cold water branch pipe (4), cold water check valve (5) is installed, the left end of the electric T-shaped valve (3) goes out on the pipeline of the constant temperature cold water branch pipe (4) The mouth of a river is connected with water-supply-pipe (6), and temperature sensor (7) is equipped on the pipeline of the water-supply-pipe (6), the water-supply-pipe (6) Left end is equipped with pressure transmitter (9), and the output port of the temperature sensor (7) passes through data line and PID control temp controlled meter (8) input port connection, the output port of the PID control temp controlled meter (8) are defeated by data line and electric T-shaped valve (3) Inbound port connects, and the left end of the pressure transmitter (9) is connected with outlet pipe (10), and the bottom of the outlet pipe (10) passes through method Orchid is connected with return duct (11), and shut-off valve (12) is equipped on the pipeline of the return duct (11).

2. the accurate temperature control water end system of a kind of washing machine performance test station according to claim 1, feature exist In：The constant-temperature hot water branch pipe (1) meets 20 DEG C -60 DEG C of water temperature output, and the constant-temperature hot water branch pipe (1) is commonly used for water temperature Degree is 30 DEG C, 40 DEG C, 55 DEG C, 60 DEG C.

3. the accurate temperature control water end system of a kind of washing machine performance test station according to claim 1, feature exist In：The electric T-shaped valve (3) includes triple valve and servo motor, the output end of the servo motor and the regulating valve of triple valve Bar connects, and the control circuit port of the servo motor is connect with the output port of PID control temp controlled meter (8) by data line.

4. the accurate temperature control water end system of a kind of washing machine performance test station according to claim 1, feature exist In：The temperature sensor (7) is Pt100 thermoelectricity resistance type temperature sensors.

5. the accurate temperature control water end system of a kind of washing machine performance test station according to claim 1, feature exist In：The pressure transmitter (9) is liquid crystal display pressure transmitter.

6. the accurate temperature control water end system of a kind of washing machine performance test station according to claim 1, feature exist In：The shut-off valve (12) is hand shut-off valve.