KR100432527B1 - Stop valve, sold valve, 4way valve controls type heat pump system - Google Patents

Abstract

The present invention changes the flow direction of the refrigerant and design the operation circuit appropriately by the trainee in the relevant educational institution by operating and operating a stop valve, a solenoid valve, and a four-way valve attached to a set of heat pump cooling and heating devices. In addition, the principle of operation and control by heat pump cooling and heating system can be indirectly observed, researched, and applied through experiments to help foster middle-sized workers in the heat pump cooling, heating, and air conditioning refrigeration facilities. The present invention relates to an experimental training system for the implementation of educational heat pump type cooling and heating. In the present invention, the temperature, pressure, power, and automatic control device attached to the automatic control panel can be automatically controlled by directly configuring circuits to be configured by directly connecting the devices with each other. Construction and repair of equipment for education, airtightness test, vacuum drying, refrigerant charge, refrigerant leakage inspection, refrigerant recovery, expansion valve installation and adjustment dryer regeneration and replacement, pressure switch operation test and adjustment, superheat and overcooling measurement This course is designed to provide practical training for students, checkers, and integrators.

The present invention is composed of one set of circuit panel, stop valve and solenoid valve control cooling and heating experiment training system, four-way valve control cooling and heating laboratory training system required for automatic control operation of heat pump cooling and heating experiment training system. The panel for automatic control operation and the experimental equipment for cold and heating are connected to each other so that the trainee can operate the circuit by using the pananat and perform the practical experiments necessary for the configuration of the cooling and heating system.

Description

Stop valve, solenoid valve, four-way valve controlled heat pump cooling and heating laboratory training system {Stop valve, sold valve, 4way valve controls type heat pump system}

The present invention avoids the arrangement and piping of equipment required for the construction of heat pump type cooling and heating devices in the air conditioning refrigeration industry, the airtight test, the refrigerant charging, the control and redirection of the refrigerant flow required for device operation, temperature control, pressure control, and defrost control. The present invention relates to an experiment and practice system that helps educators observe, research and apply through experimentation and practice to help trainees train as trainees who can work in the air conditioning refrigeration industry.

Heat pump cooling and heating system is composed of refrigeration machine and electric and sensor automatic control in industrial field. Therefore, in order to construct heat pump cooling and heating system and air-conditioning refrigeration system, it is necessary to understand and design the principle and function of refrigeration machinery, and the principle of electric and sensor automatic control, control operation and circuit design ability are essential.

Air conditioning refrigeration industry Most of the refrigeration system and automatic control system are large and concealed, so the principle and function of heat pump cooling and heating system and air conditioning refrigeration and automatic control experiments are difficult and limited.

Therefore, there is a need for a system that can easily understand and experiment with electrical and automatic control equipment and A / S.

The present invention is complicated and concealed in the case of the automatic control devices and devices of the heat pump cooling, heating system and air conditioning refrigeration system to express, miniaturize, and set the required by the trainee in the educational institution to easily configure the device Experiment, practice and automatic control circuit design configuration The purpose of the practice to practice the principle of implementation.

Furthermore, the present invention is trained through experiments to understand the principle of implementation of electric and automatic control and equipment, thus improving the facility capacity of related industries and learning the operation method, which is suitable for the installation, design and A / S of cooling and heating. The purpose is to cultivate professionals.

In order to achieve the above object, the present invention utilizes various control devices attached to the automatic control panel for temperature and pressure power defrost, and the trainee directly configures the pananat for the circuit diagram to be trained, and then operates the device and reports the temperature and pressure of each part. Changes were indexed to check operating conditions and data were used to test the performance of heat pump type cooling and heating systems.

As described above, the present invention constitutes a circuit in which a heat pump type cooling and heating operation is related to an automatic control panel and a refrigerating device, and operates as a cooling and heating system using a stop valve, a solenoid valve, and a four-way valve. In order to contribute to the development of air-conditioning and refrigeration industry, the educational effect of learning and observing the education is to study and analyze theoretical principles, techniques, and methods, and to develop the ability to apply them in various industries to practical industries. The purpose is.

Figures 1a, 1b, 1c is a physical sample picture configuration for the stop valve, solenoid valve, four-way valve controlled heat pump cooling, heating system

Figure 2a, 2b, 2c is a flow diagram and operating circuit diagram of the stop valve manual control heat pump cooling and heating system

3A, 3B, and 3C are refrigerant flow charts and operating circuit diagrams of a solenoid valve automatic control heat pump cooling and heating system.

4A, 4B, and 4C are refrigerant flow charts and operating circuit diagrams of a 4-way valve automatic control heat pump cooling and heating system.

The main configuration of the apparatus according to the present invention for achieving the above object is a pair of heat exchangers (208a, 208b) installed up and down on the plate, and expansion valve (207a) is provided between the two heat exchangers connected to the 207b, an assembly of solenoid valves 202c and 202d and stop valves 203c and 203d connected by pipes to the other ends of the heat exchangers 208a and 208b, and the solenoid valves 202c and 202d and stops described above. A liquid separator 209 installed between the assembly of valves 203c and 203d, a compressor 201 connected to the liquid separator 209 and including a motor, and one end connected to the compressor 201 and the other One end of the solenoid valves 202a and 202b and the stop valves 203a and 203b connected between the heat exchangers 208a and 208b and the connection pipes of the expansion valves 207a and 207b, and the heat exchanger 208a and 208b. ) Is connected to the middle of the connecting pipe connected between the solenoid valves 202c and 202d and the stop valves 203c and 203d. A stop consisting of a combination of the check valve 204a and 204b which is connected to the backflow check valve 204a and 204b and the dryer 205 stop valve 203e and the receiver 206 which are sequentially connected to the branch pipes sequentially. Valve and solenoid valve control air conditioning control device; A pair of heat exchangers 303a and 303b connected up and down on a plate, expansion valves 310a and 310b installed between the two heat exchangers connected to each other, and pipes at the other ends of the heat exchangers 208a and 208b. The four-way valve 302 connected by the compressor, the compressor 302 and the liquid separator 312 installed in connection with the four-way valve 302, the heat exchanger 303a, 303b and the expansion valve 310c, Check valves 305, dryers 306, solenoid valves sequentially connected to the back check valves 304a and 304b connected between 310d) and branch pipes sequentially between the two check valves 204a and 204b. 307 and four-way valve automatic control heating and cooling device made of a combination of the receiver 309; And a control panel for controlling the stop valve, the solenoid valve control cooling and heating control device, and the four-way valve automatic control heating and cooling device. The control panel includes a select switch 101 and a toggle switch 102. , Power lamp 103a, emergency lamp 103b, abnormal buzzer 104, pushbutton 105, magnetic switch 106, thermal relay 107, overcurrent breaker 108, voltage regulator 109, Ammeter 110, Terminal Base 111, Low Voltage Disconnect Switch 112, High Voltage Circuit Breaker 113, Relay 114, Timer 115, 24 Hour Timer 116, Lighting 117, Digital Thermometer 118 ), Characterized in that it comprises a temperature controller (119).

Other features, configurations, and operations of the present invention other than the above-described basic configuration will be described in detail with reference to the accompanying drawings.

Figures 1a, 1b, 1c is a block diagram of the stop valve, solenoid valve, four-way valve controlled heat pump cooling, heating system.

1A and 1B are combined into one set to form a stop valve and solenoid valve controlled heat pump cooling and heating system, and FIG. 1A and 1C are combined into a set of four way valve controlled heat pump cooling and heating system. This is made up.

Therefore, FIG. 1A is commonly applied as an automatic temperature, pressure, and power automatic control device for operating the apparatus of FIGS. 1B and 1C, and is configured to operate by constructing a pana tweet after designing a heat pump type cooling and heating operation circuit.

2A, 2B and 2C are flowcharts and operation circuit diagrams of the refrigerant when the apparatus of FIGS. 1A and 1B are combined to operate the cooling and heating system by the stop valve 203 operation.

3A, 3B, and 3C are refrigerant flow diagrams and operation circuit diagrams when Figs. 1A and 1B are combined to operate a cooling and heating system by solenoid valve control.

4A, 4B, and 4C are refrigerant flow diagrams and driving circuit diagrams when FIGS. 1A and 1C are combined to operate a cooling and heating system by four-way valve control.

The following describes the functions and interactions of the various devices configured as shown in Figs. 1A, 1B and 1C.

Reference numeral 101 denotes a select switch (S / W) that functions as a switch for switching on or off of the operation circuit in the heat pump cooling, heating experiment and training system, and for switching between automatic operation and manual operation.

Reference numeral 102 denotes a toggle switch (T.G / SW), which functions as a switch for cooling and heating operation in a four-way valve type heat pump cooling and heating experiment and training system.

In the drawing, 103a is a power lamp and 103b is an emergency lamp.

Reference numeral 104 denotes an emergency buzzer (B ′). When an abnormal phenomenon occurs during the operation of an educational device such as a thermal relay operation of an experiment and a training system, a buzzer sounds and an emergency light turns on.

Reference numeral 105 is a pushbutton.

Reference numeral 106 denotes a magnetic switch (MC), which is required for motor operation on main circuits such as compressor motors, heat exchangers (208a, 208b), and shock motors in experiments and practice systems, and for operation of auxiliary circuits. When it flows, it is excited to attract the moving core to close the main contact point and the auxiliary contact point, which is the contact point a. If no current flows in the magnetic switch electromagnetic coil, the contact point is opened and the driving circuit is controlled.

Reference numeral 107 denotes a thermal relay (T.h.r), which stops operation by opening a contact when an abnormal current flows due to overloading of the compressor motor and heat exchanger 208a and 208b of the experiment and training system. After removing the cause, press the reset button to restart.

Reference numeral 108 denotes an overcurrent circuit breaker (NF B), which protects the wiring and the device from overcurrent due to an overload or a short-circuit on the circuit due to the cause of the compressor motor, the heat exchanger 1 and 2 휀 motor of the experiment and training system. The operation is stopped by automatically shutting off. When disconnecting, there is no need to replace it with a fuse, and the power can be turned on easily by simply operating the handle.

Reference numeral 109 denotes a voltage meter, which measures the amount of voltage applied to the compressor motor, the heat exchanger 1, 2 휀 motor and the control device of the experiment and training system.

Reference numeral 110 is an ammeter to measure the amount of current applied to the compressor motor, the heat exchanger 1,2,3 휀 motor and the control device of the experiment and training system.

Reference numeral 111 denotes a terminal base (T. B) that connects power inputs and outputs to be connected to terminals so that power can be connected for the operation of experiments, training systems, and various devices.

Reference numeral 112 denotes a low pressure shut-off switch (L. P. S). When the low pressure is lower than the set value during operation in the experiment and practice system, the contact is opened and the operation is stopped and restarted when the normal low pressure is reached. The principle of operation is to turn off the contact when the detected pressure drops to the cut-in pressure. Evaporating temperature control and pressure control The principle that operation is stopped when the cooling temperature falls below the set temperature during automatic operation is that the high pressure rises and the low pressure goes down when the operation continues with the solenoid valve on the liquid pipe closed because the temperature control switch is opened. do. As the low pressure drops, the low pressure cut-off switch lowers to cut in pressure, and the low pressure cut-off switch (LP S) contact is opened. As the load increases and the cooling temperature rises, the contact of the temperature control switch closes to open the solenoid valve.When the low and high pressure reaches the cut-out point of the low pressure cut-off switch (LP S) while the balance is in progress, The contact is closed, and the compressor motor and the condenser motor in the circuit series are started to operate normally.

Reference numeral 113 denotes a high-pressure cut-off switch (H. P. S), which is normally used as a safety device because the contact is opened because the contact is opened when an abnormal pressure occurs on the pipe of the apparatus during operation or practice system or when the discharge pressure of the compressor rises rapidly. Principle of operation is to cut-off pressure when the detected pressure reaches the cut-out pressure that has risen above the specified pressure. At this time, the pressure difference between driving and stopping is called differential.

Reference numeral 114 denotes a relay (Ry), a device having a function of opening and closing a contact by an electromagnetic force in an experiment and a training system. It is operated automatically and used for control on auxiliary circuit. When a current flows in the relay electromagnetic coil, the fixed iron core becomes an electromagnet, the movable iron piece is sucked in, and the movable contact connected thereto is in contact with the fixed contact. If the electromagnetic force is lost, the movable contact is returned to the spring force and returned to its original state.

Reference numeral 115 denotes a timer to operate the load and the operation for a predetermined time (seconds) to the operation device and controller of the experiment and training system. In the refrigeration system, for example, in order to defrost for a certain time, the electric heater attached to the evaporator pipe is heated for the defrosting timer for the defrosting timer. It controls the time to induce hot gas defrosting by a certain time.

Reference numeral 116 denotes a 24 hour timer, which is suitable for the evaporator in an experiment and a training system, and defrosting is caused by a decrease in the heat passing rate. The refrigeration training device is able to automatically defrost electric defrost and hot gas defrost as the timer setting time.When setting the defrost time, it is a 24-hour timer used in real industry. It operates during the set operation time and defrosting is performed periodically for the set pin time. At this time, it is a timer used to control operation and defrosting time automatically so that defrosting can be performed as much as the time set by defrosting automatically during operation for 24 hours a day.

Reference numeral 117 denotes a light (L) to display a certain state of operation, such as operation and stop, as a signal according to the operation of the experiment and training system.

Reference numeral 118 denotes a digital thermometer to test the performance of the refrigerator by measuring the temperature of a predetermined temperature measuring part and performing a humidity and steam diagram using the temperature measurement part of the measuring unit for the performance test when the system is operated. . Digital thermometer is necessary for temperature measurement of each part.

Reference numeral 119 denotes a temperature controller T / C1.2 to control the operation so that the set temperature is maintained during the cooling and heating operation.

2A, 2B and 2C are flowcharts and operation circuit diagrams of the refrigerant when the apparatus of FIGS. 1A and 1B are combined to operate the cooling and heating system by the stop valve 203 operation.

Reference numeral 201 denotes a compressor (including a motor), which absorbs heat from a cooled object in a heat exchanger of an experiment and a training system, inhales and compresses low-temperature, low-pressure gas and refrigerant that have evaporated to increase the pressure to bring the intermolecular distance closer to each other. Raise the gas refrigerant at room temperature so that it can be easily liquefied in the heat exchanger. In other words, the heat obtained by evaporation of the refrigerant from the low heat source (evaporator) serves as a high temperature and high pressure to the high heat source (condenser).

Reference numerals 202a, 202b, 202c, and 202d are solenoid valves SV1, SV2, SV3, and SV4, which are opened and closed according to the circuit configuration during heat pump type cooling and heating operation to switch the flow direction of the refrigerant to perform cooling operation and heating operation. It is to change the refrigerant flow direction to enable.

Reference numerals 203a, 203b, 203c, 203d, and 203e are stop valves (ST. V1, ST. V2, ST. V3, ST. V4, ST. V5) to open and close the heat pump type during cold / heating operation manually. By changing the refrigerant flow direction to the cooling operation and heating operation to switch the flow direction of the refrigerant.

Reference numerals 204a and 204b refer to the non-return valves C. V1 and C. V2 to allow the refrigerant to flow in only one direction during the heat pump type cooling and heating operation. The city functions to flow the refrigerant to be heated.

Reference numeral 205 denotes a filter drier, and when water and foreign substances are present in the refrigerant system of the experiment and practice system, various effects are adversely affected on the refrigerating device. Remove moisture and debris.

Reference numeral 206 denotes a container which temporarily stores the refrigerant liquid liquefied in the heat exchanger of the experiment and training system before it is sent to the expansion valve, which is treated as a high pressure container and pumped down when the device is repaired or stopped for a long time. It also serves to recover the refrigerant in the device.

Reference numerals 207a and 207b are expansion valves (EXP.V1 and EXP.V2) attached to the inlet side of the heat exchangers 208a and 208b so that when the heat exchanger functions as an evaporator during the cooling operation and the heating operation, The high pressure liquid refrigerant is made into a low temperature, low pressure liquid refrigerant to be evaporated in the heat exchanger.

Reference numerals 208a and 208b denote heat exchangers for cooling and heating the heat pump. In the cooling operation of the educational equipment, the heat exchanger 208a functions as an evaporator so that when the cold air is generated by the motor, the heat exchanger 2 becomes a condenser. The heat exchanger 208a functions as a condenser and warm air is generated by the shock motor, and the heat exchanger 208b functions as an evaporator.

Reference numeral 209 denotes an accumulator, which is installed in the suction pipe between the heat exchanger and the compressor of the experiment and practice system to separate the liquid refrigerant in the intake gas, thereby protecting the compressor by preventing liquid back to the compressor. It plays a role. The secondary function prevents the liquid in the heat exchanger from changing at startup.

Reference numeral 301 denotes a compressor (including a motor), which absorbs heat from an object to be cooled in an evaporator of an experiment and a training system, inhales and compresses low-temperature, low-pressure gas and refrigerant that have evaporated to increase the pressure to bring the molecular distance closer to each other. It is raised so that the gaseous refrigerant at room temperature can be easily liquefied in the heat exchanger. In other words, the heat obtained by evaporation of the refrigerant from the low heat source (evaporator) serves as a high temperature and high pressure to the high heat source (condenser).

Reference numeral 302 denotes a four-way valve, which is a four-way valve controlled heat pump cooling / heating education device. When the power is supplied to the four-way valve and the electric current flows, it becomes a cooling operation cycle. When the power is disconnected and the electric current does not flow, the heating operation cycle becomes a four-way valve. . The four-way valve functions to change the flow direction of the refrigerant to be a cooling and heating cycle depending on whether power is supplied.

Reference numerals 303a and 303b denote heat exchangers for cooling and heating the heat pump. In the cooling operation of the educational equipment, the heat exchanger 303a functions as an evaporator so that when the cold air is generated by the motor, the heat exchanger 2 becomes the condenser and the heat exchanger during the heating operation. The machine 303a functions as a condenser, and warm air is generated by the shock motor. At this time, the heat exchanger 303b functions as an evaporator.

Reference numerals 304a and 304b are non-return valves (C. V1, C. V2), and the heat exchanger 303a functions as an evaporator during the cooling operation of the heat pump cooling and heating educational equipment. The unit 2 becomes a condenser, and during the heating operation, the heat exchanger 303a functions as a condenser so that warm air is generated by the shock motor, and the heat exchanger 303b functions as an evaporator.

Reference numeral 305 denotes a stop valve (ST.V), which is a valve control heat pump cooling / heating education apparatus. After operation, keep it open for normal operation.

Reference numeral 306 denotes a filter drier, and when water and foreign substances are present in the refrigerant system of the experiment and training system, various effects are adversely affected on the refrigeration system. Remove moisture and debris.

Reference numeral 307 denotes a solenoid valve (S. V), and a solenoid valve 307 is installed on the main pipe of the apparatus to design and configure a pump-down operation circuit for cooling operation in a four-way valve controlled heat pump cooling and heating education system. Function to make temperature and pressure automatic control operation.

Reference numeral 308 denotes a sight glass to check whether the proper amount of refrigerant is charged to the receiver side of the liquid pipe of the experiment and training system, and whether the refrigerant is dried. When the proper amount of refrigerant is filled and the condensation is good, the foam disappears and the liquid passes through the clear liquid refrigerant. When bubbles do not move, when there are bubbles only on the inlet side and not visible on the outlet side, when the bubbles are not continuous and sometimes visible, the appropriate amount of refrigerant is considered to be charged.

Reference numeral 309 denotes a container which temporarily stores the refrigerant liquid liquefied in the heat exchanger of the experiment and training system before sending it to the expansion valve. The container is treated as a high pressure container and pumped when the freezer is repaired or stopped for a long time. It also plays a role of recovering the refrigerant in the apparatus by the down operation.

Reference numeral 310a, 310b is an expansion valve (EXP.V1, EXP.V2) is attached to the inlet side of the heat exchanger (303a, 303b) so that when the heat exchanger functions as an evaporator during the cooling operation and heating operation, it is adiabatic expansion and high temperature, High-pressure liquid refrigerant is made into a low-temperature, low-pressure liquid refrigerant to be evaporated in the evaporator.

As described above, the functions and interactions of the various devices have been described.

Next, an implementation principle of a stop valve manual control cooling and heating system will be described with reference to FIGS. 2A, 2B, and 2C.

The operating principle of the stop valve manual control cooling system is explained as follows based on the flowchart of FIG.

When the stop valves 203a and 203c and the solenoid valves 202a, 202b, 202c and 202d are closed and the stop valves 203b, 203d and 203e are opened and operated, the heat exchanger 208a becomes an evaporator to cool down (cool air) operation. Becomes The operating principle is that the liquid refrigerant in the low temperature and low pressure refrigerant evaporated in the heat exchanger 208a is separated in the liquid separator 209, and only the pure low temperature low pressure gas refrigerant is sucked into the compressor 201, and condensed in the heat exchanger 208b. The refrigerant is compressed to a condensation pressure so as to be easily liquefied, thereby making a gas refrigerant of high temperature and high pressure. The high-temperature, high-pressure gas refrigerant is condensed and liquefied in the heat exchanger 208b and passes through the non-return valve 204b, the dryer 205, the stop valve 203e, the receiver 206, and adiabatic expansion in the expansion valve 207a. As a result, the liquid refrigerant is a low-temperature, low-pressure liquid refrigerant, and evaporates in the heat exchanger 208a. At this time, a cycle of the cooling (cooling air) system is performed by the air cooling fan motor.

The operating principle of the heating system will be described based on the flowchart of FIG. 2B.

When the stop valves 203b and 203d and the solenoid valves 202a, 202c and 202d are closed and the stop valves 203a, 203c and 203e are opened and operated, the heat exchanger 208a becomes a condenser and becomes a heating (hot air) system.

The operating principle is the low temperature low pressure gas refrigerant evaporated from the heat exchanger (208b) passes through the stop valve (203c) and the liquid separator (209), is sucked into the compressor 201, and raises the pressure and temperature of the gas refrigerant to heat exchanger ( At 208a, the condensation pressure is increased to facilitate condensation, and at this time, the heat exchanger 208a generates warm air (heating) according to the rotation of the air in an air cooling manner.

According to the apparatus according to the present invention as described above, it is possible to expect a visual, auditory, perceptual, sensory learning effect in the theory and practice classes of the related education subjects, such as a refrigeration system.

In addition, the device according to the present invention is compact, hidden and automatic control of the refrigeration unit and automatic control that is complicated and concealed, easy to move and can be utilized anywhere, anytime, anywhere.

In addition, according to the device of the present invention because the circuit is configured by connecting the refrigeration unit and the automatic control device with pananat, it can be easily understood and configured in a short time, and can be immediately corrected when misconfigured.

In addition, the device according to the present invention is economical because it can save a lot of training material costs because it uses a non-consumable pananatk without using a vinyl wire during the training.

In addition, according to the present invention can be carried out step by step according to the difficulty of the configuration of the refrigeration unit operation circuit and the electrical power wiring practice (including single phase and three phase).

In addition, according to the present invention, since the temperature and pressure of each part can be measured during the operation of the refrigerator, practical training, such as design, integration, inspection, and repair, which are necessary for the operation inspection of the refrigerator and the manufacture of the refrigerator, by calculating the amount of heat and heat input by drawing a refrigeration diagram. can do.

In addition, according to the present invention, the configuration and operation of the refrigerator can be made by hand, and in particular, it is suitable as an educational equipment in the field of refrigeration technology in the International Functional Olympics and the National Functional Competition.

Claims (3)

A pair of heat exchangers 208a and 208b connected up and down on the plate, expansion valves 207a and 207b installed between the two heat exchangers connected thereto, and pipes at the other ends of the heat exchangers 208a and 208b. The liquid separator 209 is connected and installed between the solenoid valves 202c and 202d and the stop valves 203c and 203d assembly connected to each other, and the solenoid valves 202c and 202d and the stop valves 203c and 203d assembly. And a compressor 201 connected to the liquid separator 209 and including a motor, one end connected to the compressor 201 and the other end to a heat exchanger 208a and 208b and an expansion valve 207a and 207b. Assembly of the solenoid valves 202a and 202b and the stop valves 203a and 203b connected between the connecting pipes, and the heat exchanger 208a and 208b and the solenoid valves 202c and 202d and the stop valves 203c and 203d. Between the non-return valves 204a and 204b and the non-return valves 204a and 204b which are installed in a pipe in the middle of the connection pipe connected therebetween. Tube in which the combination of the dryer 205, a stop valve (203e) and the receiver (206) coupled to the sequential continuous stop valve and the solenoid valve control air conditioning control device; A pair of heat exchangers 303a and 303b connected up and down on a plate, expansion valves 310a and 310b installed between the two heat exchangers connected to each other, and pipes at the other ends of the heat exchangers 208a and 208b. The four-way valve 302 connected by the compressor, the compressor 302 and the liquid separator 312 installed in connection with the four-way valve 302, the heat exchanger 303a, 303b and the expansion valve 310c, Check valves 305, dryers 306, solenoid valves sequentially connected to the back check valves 304a and 304b connected between 310d) and branch pipes sequentially between the two check valves 204a and 204b. 307 and four-way valve automatic control heating and cooling device made of a combination of the receiver 309; And Stop valve, solenoid valve control heating and cooling control device and four-way valve automatic control heating and cooling device comprising a control panel for controlling the stop valve, solenoid valve, four-way valve controlled heat pump cooling, heating laboratory system The method of claim 1, The control panel described above includes a select switch 101, a toggle switch 102, a power lamp 103a, an emergency lamp 103b, an abnormal buzzer 104, a push button 105, a magnetic switch 106, and a thermodynamic system. Electricity 107, overcurrent breaker 108, voltmeter 109, ammeter 110, terminal base 111, low voltage breaker switch 112, high voltage breaker 113, relay 114, timer 115 , 24-hour timer 116, lighting 117, digital thermometer 118, temperature controller 119, characterized in that the stop valve, solenoid valve, four-way valve controlled heat pump cooling, heating laboratory system The method according to claim 1 or 2, wherein the stop valve, the solenoid valve, the four-way valve-controlled heat pump for cooling and heating are operated by connecting or configuring a line using pana tweets in the control panel. Stop valve, solenoid valve, four-way valve controlled heat pump cooling and heating laboratory system