CN220250195U

CN220250195U - Multi-connected unit device utilizing heat energy of earth shallow layer

Info

Publication number: CN220250195U
Application number: CN202321732204.5U
Authority: CN
Inventors: 于群发; 于会锋
Original assignee: Shanxi Xinyuan Valley Energy Technology Co ltd
Current assignee: Shanxi Xinyuan Valley Energy Technology Co ltd
Priority date: 2023-07-04
Filing date: 2023-07-04
Publication date: 2023-12-26
Anticipated expiration: 2033-07-04

Abstract

The utility model relates to the technical field of application of ground source heat pumps, in particular to a multi-unit device utilizing heat energy of the earth shallow layer. The multi-connected unit device utilizing the heat energy of the earth shallow layer comprises a ground source heat pump unit, a double-pipe and a multi-connected unit, wherein the ground source heat pump unit is arranged in a ground buried water collector machine room, a heat exchange unit of the multi-connected unit is arranged in a room elsewhere, pipelines among the heat exchange units are connected in parallel, and the ground source heat pump unit is connected with the multi-connected unit in a sealing way through the double-pipe; the multi-connected unit device has the advantages that the design is reasonable, one ground source heat pump drives a plurality of heat exchange units, the structure is simple, economical and practical, the heat of the natural environment is injected into the ground when the temperature is reduced in summer, the heat injected into the ground in winter is taken back again when the temperature is reduced in winter, the environment is not polluted, the electricity and the energy are saved, and the running cost is reduced.

Description

Multi-connected unit device utilizing heat energy of earth shallow layer

Technical Field

The utility model relates to the technical field of application of ground source heat pumps, in particular to a multi-unit device utilizing heat energy of the earth shallow layer.

Background

The water flows downwards in the natural world, and heat naturally flows from the high-temperature object to the ground-temperature object; the water pump can make water flow to the high place by means of external electric energy to do work; the heat pump can transfer heat from a low-temperature environment to a high-temperature environment by means of external electric energy to do work. The heat energy of the earth shallow layer is the solar energy accumulated in the earth shallow layer, the earth absorbs most of solar radiation heat energy, the underground is 15 meters to 150 meters, and the ground temperature or the water temperature is kept at about 17 ℃ throughout the year. The heat energy of the earth shallow layer is lower than the air temperature in summer and higher than the air temperature in winter; the heat energy of the earth shallow layer has the characteristics of good stability, low cost, no pollution and zero emission, and has the defects of low temperature and incapability of being directly used. Heat pump technology analysis using thermodynamic principles: the ambient temperature in winter is below zero, and the ground source heating efficiency is higher than the air energy heating efficiency in winter by utilizing the ground source heat pump technology; the temperature of the environment in summer is above 30 ℃, and the temperature is reduced more efficiently than the temperature reduced from air energy by utilizing the ground source heat pump technology. In the heat pump system, a compressor is a heart, and the outside electric energy is used for sucking low-temperature low-pressure refrigerant steam and compressing the low-temperature low-pressure refrigerant steam into high-temperature high-pressure refrigerant steam with the temperature of about 80 ℃ to be conveyed to a condenser; the refrigerant vapor in the condenser releases heat to condense high-pressure liquid, the condenser is an automatic heat release component (the temperature of the condenser is higher than the ambient temperature) for releasing heat to transfer the heat absorbed by the refrigerant in the evaporator and the heat converted by the work of the compressor to the environment; the temperature of the high-pressure liquid of the refrigerant from the condenser is about 50 ℃, the high-pressure liquid is throttled and depressurized by an electronic throttle valve (also called an expansion valve), the whole heat pump system is divided into a high-pressure side and a low-pressure side, the high-pressure side is arranged in front of the electronic throttle valve, and the low-pressure side is arranged behind the electronic throttle valve. The low-pressure side refrigerant liquid diffuses and absorbs heat in an evaporator to be changed into low-pressure low-temperature refrigerant steam, and the evaporator is a component for conveying cold energy to the environment; and then, the low-pressure low-temperature refrigerant steam enters a gas-liquid separator for separation, and the separated low-pressure low-temperature refrigerant steam is sucked into the compressor again to complete one cycle. In addition to the four parts, auxiliary equipment such as a four-way electromagnetic valve is often arranged, the upper end is provided with a high-pressure air inlet, and the lower end is provided with a conversion interface, so that the flow direction of high-temperature high-pressure refrigerant steam is changed, heating is performed in winter, and cooling is performed in summer; and oil separators, pressure controllers and other components, which are arranged for improving the economy, reliability and safety of the operation of the heat pump.

The utility model uses the ground source heat pump to absorb heat or release heat from the water collector to finish the energy conversion of earth gas, and the energy is sent to the heat exchanger of the multi-unit through the double pipes, and the heat exchanger of the multi-unit sends warmth or coolness to a plurality of rooms; a ground source heat pump can drive a plurality of heat exchangers through double pipes.

Disclosure of Invention

The utility model combines the ground source, the heat pump and the multiple heat exchangers to form a ground source heat pump double-pipe multiple heat exchanger system, and one ground source heat pump can drive a plurality of heat exchangers.

The utility model is realized by adopting the following technical scheme:

the multi-connected unit device utilizing the heat energy of the earth shallow layer is divided into a ground source heat pump unit, a double pipe and a multi-connected unit as shown in figure 1, wherein the ground source heat pump unit is arranged in a machine room of a buried water collector, a heat exchanger unit of the multi-connected unit is arranged in a room elsewhere, pipelines among a plurality of heat exchanger units are connected in parallel, and the ground source heat pump unit is connected with the multi-connected unit in a sealing way through the double pipe;

as shown in fig. 1, the ground source heat pump unit comprises a variable frequency compressor, a four-way electromagnetic valve, a refrigerant electromagnetic valve 1, a refrigerant electromagnetic valve 2, an electronic throttle valve, a spiral metal sleeve heat exchanger, a water pump, a buried water collector, a gas-liquid separator and a control module; the air inlet of the variable frequency compressor is hermetically connected with the high-pressure air inlet of the four-way electromagnetic valve, the air outlet on the right side of the four-way electromagnetic valve is hermetically connected with the refrigerant electromagnetic valve 1, the refrigerant electromagnetic valve 1 is hermetically connected with the multi-connected unit through a pipeline, the multi-connected unit is hermetically connected with the refrigerant electromagnetic valve 2 through a pipeline, the refrigerant electromagnetic valve 2 is hermetically connected with the coil pipe of the electronic throttle valve hermetically connected with the spiral metal sleeve heat exchanger, the coil pipe of the spiral metal sleeve heat exchanger is hermetically connected with the left side outlet of the four-way electromagnetic valve, the middle outlet of the four-way electromagnetic valve is hermetically connected with the inlet end of the gas-liquid separator, and the outlet end of the gas-liquid separator is hermetically connected with the inlet of the variable frequency compressor; one end of the spiral metal sleeve heat exchanger sleeve is hermetically connected with one end of a U-shaped water return pipe of the buried water collector, the other end of the U-shaped water return pipe of the buried water collector is hermetically connected with a water inlet end of a water pump, and a water outlet end of the water pump is hermetically connected with the other end of the spiral metal sleeve heat exchanger sleeve;

as shown in fig. 1, the multi-connected unit comprises a plurality of user heat exchange units which are connected in parallel; the user heat exchange unit comprises a user electromagnetic valve, a user heat exchange fan and a user metal tube fin heat exchanger, wherein one end of the user electromagnetic valve is connected with a refrigerant electromagnetic valve 1 in a sealing way through a pipeline, the other end of the user electromagnetic valve is connected with one end of the metal tube fin heat exchanger in a sealing way, the other end of the metal tube fin heat exchanger is connected with a refrigerant electromagnetic valve 2 in a sealing way through a pipeline, and the heat exchange fan is arranged at the back of the metal tube fin heat exchanger;

the metal tube fin heat exchanger is characterized in that metal fins which are closely contacted with a metal tube are arranged around the metal tube, so that the surface area of the metal tube is enlarged, heat dissipation is accelerated, and the metal tube and the metal fins are preferably made of copper; after the metal tube fin heat exchanger is arranged at the air outlet of the heat exchanger box body, the size of the metal tube fin heat exchanger is matched with the air outlet of the heat exchanger box body, a fan is arranged behind the metal tube fin heat exchanger, the fan sucks air from the air inlet at the upper part of the heat exchanger box body, and the fan blows air to the room through the metal tube fin heat exchanger and the air outlet at the lower part of the heat exchanger box body;

the control module circuit is connected with the variable-frequency compressor, the four-way electromagnetic valve, the refrigerant electromagnetic valve 1, the refrigerant electromagnetic valve 2, the electronic throttle valve, the water pump, the plurality of user electromagnetic valves and the plurality of unit heat exchange fans;

the buried water collector comprises a plurality of ground source wells and a plurality of U-shaped water return pipes; the U-shaped water return pipe is arranged in the ground source well, and the water temperature in the U-shaped water return pipe is the same as the water temperature of the ground source well; one end of the U-shaped water return pipe is connected with the water pump in parallel, and the other end of the U-shaped water return pipe is a sleeve pipe of which the water return port is connected with the spiral metal sleeve heat exchanger;

the metal sleeve of the spiral metal sleeve heat exchanger is sleeved with a metal sleeve, the inside of the metal coil is airtight, the inside of the metal sleeve is airtight, and the metal sleeve and the inside metal coil are integrally manufactured into a spiral coil shape; one end of the metal coil is connected with one end of the electronic throttle valve, the other end of the metal coil is connected with a left side interface of the lower end of the four-way electromagnetic valve, and refrigerant is introduced into the metal coil; one end of the metal sleeve is connected with a water outlet of the water pump, a water inlet of the water pump is connected with a water outlet of the buried water collector, and a water return port of the buried water collector is connected with the other end of the heat exchange sleeve;

preferably, the spiral metal coil pipe and the metal sleeve pipe are made of copper, so that the heat exchange slope is improved;

the high-pressure outlet of the compressor is connected with the high-pressure inlet at the upper end of the four-way electromagnetic valve, the right-side outlet at the lower end of the four-way electromagnetic valve is connected with the refrigerant electromagnetic valve 1, the other end of the refrigerant electromagnetic valve 1 is connected with the user electromagnetic valve, the user electromagnetic valve is connected with one end of a metal tube of the metal tube fin heat exchanger, the other end of the metal tube fin heat exchanger is connected with the refrigerant electromagnetic valve 2, the refrigerant electromagnetic valve 2 is connected with the electronic throttle valve, the other end of the electronic throttle valve is connected with the coil pipe of the spiral metal sleeve heat exchanger, the other end of the coil pipe of the spiral metal sleeve heat exchanger is connected with the left-end interface at the lower side of the four-way electromagnetic valve, and the middle-end interface at the lower side of the four-way electromagnetic valve is connected with the inlet of the gas-liquid separator; the outlet of the gas-liquid separator is connected with the inlet of the compressor;

multi-unit device using earth shallow heat energy to introduce working principle

Heating mode: in winter, the room environment temperature is lower than the water temperature of the buried water collector, and the multi-connected unit starts a heating mode. A user in the multi-connected unit starts a double-pipe multi-connected unit system of the ground source heat pump, a user electromagnetic valve and a heat exchange fan of the user are opened, a control module of the double-pipe multi-connected unit system of the ground source heat pump starts a variable frequency compressor and a water pump of the buried water collector, the control module opens an electronic throttle valve, a refrigerant electromagnetic valve 1 and a refrigerant electromagnetic valve 2, a high-pressure inlet at the upper end of the four-way electromagnetic valve is communicated with a right-side outlet at the lower end of the four-way electromagnetic valve, the variable frequency compressor is started, and a right-side outlet at the lower end of the four-way electromagnetic valve is communicated with a metal pipe fin heat exchanger through the refrigerant electromagnetic valve 1; the metal tube fin heat exchanger is a condenser, high-temperature and high-pressure refrigerant gas releases heat in the metal tube fin heat exchanger, the gas changes into liquid phase transition to release heat, the temperature of the metal tube fin heat exchanger is higher than the ambient temperature, and the heat exchange fan blows heat energy of the metal tube fin heat exchanger into a room to realize heating; the process is an exothermic process; the released heat is blown into a room by a fan for heating; the total heat is equal to the physical working heat of the buried water collection carrying heat and the compressor; then high-pressure refrigerant liquid from the metal tube fin heat exchanger enters the electronic throttle valve through the refrigerant electromagnetic valve 2, and diffuses and absorbs heat in a coil pipe of the spiral metal sleeve heat exchanger, so that the liquid becomes low-pressure refrigerant gas; the spiral metal sleeve heat exchanger is an evaporator; the low-pressure refrigerant gas passes through the left inlet of the lower end of the four-way electromagnetic valve, the middle outlet pipeline is connected with the inlet of the gas-liquid separator, and the outlet pipeline of the gas-liquid separator is connected with the inlet of the variable-frequency compressor, so that the circulation is completed. And the control module of the ground source heat pump double-pipe multi-connected unit system improves the frequency of the variable frequency compressor and increases the heating power.

Cooling mode: the ambient temperature of the summer room is higher than the water temperature of the buried water collector, and the multi-connected unit starts a refrigeration mode. A user in the multi-connected unit starts a double-pipe multi-connected unit system of the ground source heat pump, a user electromagnetic valve and a heat exchange fan of the user are opened, a control module of the double-pipe multi-connected unit system of the ground source heat pump starts a variable frequency compressor and a water pump of the buried water collector, the control module reversely opens an electronic throttle valve, a refrigerant electromagnetic valve 1 and a refrigerant electromagnetic valve 2, a high-pressure inlet at the upper end of the four-way electromagnetic valve is communicated with a left outlet at the lower end of the four-way electromagnetic valve, the variable frequency compressor is started, and the left outlet at the lower end of the four-way electromagnetic valve is communicated with a metal pipe fin heat exchanger; the metal tube fin heat exchanger is a condenser, high-temperature and high-pressure refrigerant gas releases heat in the metal tube fin heat exchanger, the gas changes into liquid phase transition to release heat, the temperature of the metal tube fin heat exchanger is higher than the ambient temperature, and the heat exchange fan blows heat energy of the metal tube fin heat exchanger into a room to realize heating; the process is an exothermic process; the released heat is blown into a room by a fan for heating; the total heat is equal to the physical working heat of the buried water collection carrying heat and the compressor; then high-pressure refrigerant liquid from the metal tube fin heat exchanger enters the electronic throttle valve through the refrigerant electromagnetic valve 2, and diffuses and absorbs heat in a coil pipe of the spiral metal sleeve heat exchanger, so that the liquid becomes low-pressure refrigerant gas; the spiral metal sleeve heat exchanger is an evaporator; the low-pressure refrigerant gas passes through the left inlet of the lower end of the four-way electromagnetic valve, the middle outlet pipeline is connected with the inlet of the gas-liquid separator, and the outlet pipeline of the gas-liquid separator is connected with the inlet of the variable-frequency compressor, so that the circulation is completed. And the control module of the ground source heat pump double-pipe multi-connected unit system improves the frequency of the variable frequency compressor and increases the heating power.

Cooling mode: the ambient temperature of the summer room is higher than the water temperature of the buried water collector, and the multi-connected unit starts a refrigeration mode. A user in the multi-connected unit starts a ground source heat pump double-pipe multi-connected unit system, a user electromagnetic valve and a heat exchange fan of the user are opened, a control module of the ground source heat pump double-pipe multi-connected unit system starts a variable frequency compressor and a water pump of a buried water collector, the control module reversely opens an electronic throttle valve, a refrigerant electromagnetic valve 1 and a refrigerant electromagnetic valve 2, the control module controls the upper end high-pressure inlet of the four-way electromagnetic valve to be communicated with the left outlet of the lower end of the four-way electromagnetic valve, the left outlet of the lower end of the four-way electromagnetic valve is communicated with a coil pipe of a spiral metal sleeve heat exchanger, and the spiral metal sleeve heat exchanger is a condenser at the moment; the high-temperature and high-pressure refrigerant gas is phase-released in a coil pipe of the spiral metal sleeve heat exchanger to be changed into high-pressure liquid, and the released heat is brought into the buried water collector by the water quantity in the spiral sleeve; the control module starts a water pump, the water pump pumps water from the buried water collector to pass through a heat exchange sleeve of the spiral metal sleeve heat exchanger, and the water pump flows back to the buried water collector again to take away the heat of the condenser; the high-pressure liquid passes through the electronic throttle valve and then diffuses and passes through the refrigerant electromagnetic valve 2, and diffuses and absorbs heat in the metal tube fin heat exchanger, so that the refrigerant high-pressure liquid absorbs heat and changes phase into refrigerant low-pressure gas; the metal tube fin heat exchanger is an evaporator at the moment, and the temperature of the metal tube fin heat exchanger is lower than the ambient temperature; the evaporation process is an endothermic process; negative heat in the heat absorption process is blown into a room by a fan to cool; the refrigerant low-pressure gas passes through the user electromagnetic valve and the refrigerant electromagnetic valve 1 to the right interface of the lower end of the four-way electromagnetic valve; the right side interface at the lower end of the four-way electromagnetic valve is connected with the middle interface at the lower end of the four-way electromagnetic valve, the middle interface at the lower end of the four-way electromagnetic valve is connected with the inlet of the gas-liquid separator, the outlet of the gas-liquid separator is connected with the inlet of the variable frequency compressor, and low-pressure steam enters the compressor again through the gas-liquid separator to complete circulation.

The multi-connected unit device has the advantages that the design is reasonable, one ground source heat pump drives a plurality of heat exchange units, the structure is simple, economical and practical, the heat of the natural environment is injected into the ground when the temperature is reduced in summer, the heat injected into the ground in winter is taken back again when the temperature is reduced in winter, the environment is not polluted, the electricity and the energy are saved, and the running cost is reduced.

Drawings

FIG. 1 is a schematic diagram showing the connection of structural modules of a multi-gang apparatus utilizing thermal energy of the earth's shallow layer according to the present utility model.

In the figure: 1. variable frequency compressor 2, electromagnetic four-way valve, 3, refrigerant solenoid valve 1,4, user unit 1,4.1, user solenoid valve 1,4.2, heat exchange fan 1,4.3, metal tube fin heat exchanger 1,5, user unit 2,5.1, user solenoid valve 2,5.2, heat exchange fan 2,5.3, metal tube fin heat exchanger 2,6, user unit 3,6.1, user solenoid valve 3,6.2, heat exchange fan 3,6.3, metal tube fin heat exchanger 3,7, refrigerant solenoid valve 2,8, electronic throttle valve, 9, spiral coil heat exchanger, 9.1, coil, 9.2, sleeve, 10, water pump, 11, buried water collector, 11.1, buried well, 11.2, U-shaped return pipe, 12, gas-liquid separator, 16, system control module.

Detailed Description

Specific embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.

The multi-connected unit device utilizing the heat energy of the earth shallow layer is divided into a ground source heat pump unit, a double-pipe and a multi-connected unit as shown in figure 1, wherein the ground source heat pump unit is arranged in a heat pump machine room, a heat exchange unit of the multi-connected unit is arranged in a room elsewhere, pipelines among the heat exchange units are connected in parallel, and the ground source heat pump unit is connected with the multi-connected unit in a sealing way through the double-pipe; the user units 1 (4), the user units 2 (5), the user units 3 (6) and more user units are connected in parallel;

as shown in fig. 1, the ground source heat pump unit comprises a variable frequency compressor (1), a four-way electromagnetic valve (2), a refrigerant electromagnetic valve 1 (3), a refrigerant electromagnetic valve 2 (7), an electronic throttle valve (8), a spiral metal sleeve heat exchanger (9), a water pump (10), a buried water collector (11), a gas-liquid separator and a control module; the air outlet of the variable frequency compressor (1) is hermetically connected with a high-pressure air inlet of a four-way electromagnetic valve (2), the air outlet on the right side of the four-way electromagnetic valve (2) is hermetically connected with a refrigerant electromagnetic valve (1) (3), the refrigerant electromagnetic valve (1) (3) is hermetically connected with a multi-connected unit through a pipeline, the multi-connected unit is hermetically connected with a refrigerant electromagnetic valve (2) (7) through a pipeline, the refrigerant electromagnetic valve (2) (7) is hermetically connected with one end of a coil (9.1) of a spiral metal sleeve heat exchanger (9), the other end of the coil (9) of the spiral metal sleeve heat exchanger is hermetically connected with the left side outlet of the four-way electromagnetic valve (2), the middle outlet of the four-way electromagnetic valve (2) is hermetically connected with the inlet end of a gas-liquid separator, and the outlet end of the gas-liquid separator is hermetically connected with the inlet of the variable frequency compressor (1); one end of a sleeve of the spiral metal sleeve heat exchanger (9) is hermetically connected with one end of a U-shaped water return pipe (11.2) of the buried water collector (11), the other end of the U-shaped water return pipe (11.2) of the buried water collector (11) is hermetically connected with a water inlet end of a water pump (10), and a water outlet end of the water pump (10) is hermetically connected with the other end of the sleeve of the spiral metal sleeve heat exchanger (9);

as shown in fig. 1, the multi-connected unit comprises a plurality of user heat exchange units which are connected in parallel; the user heat exchange unit comprises a user electromagnetic valve, a user heat exchange fan and a user metal tube fin heat exchanger; one end of a user electromagnetic valve (4.1) is connected with a refrigerant electromagnetic valve 1 (3) in a sealing way through a pipeline, the other end of the user electromagnetic valve (4.1) is connected with one end of a metal tube fin heat exchanger (4.3) in a sealing way, the other end of the metal tube fin heat exchanger (4.3) is connected with a refrigerant electromagnetic valve 2 (7) in a sealing way through a pipeline, and a heat exchange fan (4.2) is arranged behind the metal tube fin heat exchanger (4.3);

the control module circuit is connected with the variable-frequency compressor (1), the four-way electromagnetic valve (2), the refrigerant electromagnetic valve 1 (3), the refrigerant electromagnetic valve 2 (7), the electronic throttle valve (8), the water pump (10), a plurality of user electromagnetic valves and a plurality of unit heat exchange fans;

the underground water collector (11) comprises a plurality of ground source wells and a plurality of U-shaped water return pipes; the U-shaped water return pipe is arranged in the ground source well, and the water temperature in the U-shaped water return pipe is the same as the water temperature of the ground source well; one end of the U-shaped water return pipes is connected in parallel with a water outlet of the buried water collector (11) and is connected with a water pump (10), and the other end of the U-shaped water return pipes is a sleeve pipe of which the water return port of the buried water collector (11) is connected with a coil heat exchanger;

the metal tube fin heat exchanger is characterized in that metal fins which are closely contacted with the metal tubes are arranged around the metal tubes, so that the surface area of the metal tubes is enlarged, heat dissipation is accelerated, and copper of the metal tubes and the metal fins is optimized; after the metal tube fin heat exchanger is arranged at the air outlet of the heat exchanger box body, the size of the metal tube fin heat exchanger is matched with the air outlet of the heat exchanger box body, a fan is arranged behind the metal tube fin heat exchanger, the fan sucks air from the air inlet at the upper part of the heat exchanger box body, and the fan blows air to the room through the metal tube fin heat exchanger and the air outlet at the lower part of the heat exchanger box body;

the spiral metal sleeve heat exchanger (9) is characterized in that a metal coil is sleeved outside a metal sleeve to manufacture a spiral coil shape integrally, one end of the metal coil is connected with one end of an electronic throttle valve (8), the other end of the metal coil is connected with a left side interface of a four-way electromagnetic valve (2), and refrigerant is introduced into the metal coil; one end of the metal sleeve is connected with the water outlet of the water pump (10), the water inlet of the water pump (10) is connected with the water outlet of the buried water collector (11), and the water return port of the buried water collector (11) is connected with the other end of the heat exchange sleeve;

preferably, the spiral coil pipe and the sleeve pipe are made of copper, so that the heat exchange slope is improved;

the high-pressure outlet of the compressor is connected with the high-pressure inlet at the upper end of the four-way electromagnetic valve (2), the right-side outlet at the lower end of the four-way electromagnetic valve (2) is connected with the refrigerant electromagnetic valve 1 (3), the other end of the refrigerant electromagnetic valve 1 (3) is connected with the user electromagnetic valve, the user electromagnetic valve is connected with one end of the metal tube fin heat exchanger, the other end of the metal tube fin heat exchanger is connected with the refrigerant electromagnetic valve 2 (7), the refrigerant electromagnetic valve 2 (7) is connected with the electronic throttle valve (8), the other end of the electronic throttle valve (8) is connected with the coil of the spiral metal sleeve heat exchanger (9), the other end of the coil of the spiral metal sleeve heat exchanger (9) is connected with the left-side interface at the lower side of the four-way electromagnetic valve (2), and the middle-side interface at the lower side of the four-way electromagnetic valve (2) is connected with the inlet of the gas-liquid separator; the outlet of the gas-liquid separator is connected with the inlet of the compressor;

Heating mode: the ambient temperature of the room in winter is lower than the water temperature of the buried water collector (11), and the multi-connected unit starts a heating mode. A user starts a ground source heat pump double-pipe multi-unit system in the multi-unit system, a user electromagnetic valve and a heat exchange fan of the user are opened, a control module of the ground source heat pump double-pipe multi-unit system starts a variable frequency compressor (1) and a water pump (10) of a buried water collector (11), the control module opens an electronic throttle valve (8), a refrigerant electromagnetic valve (1) and a refrigerant electromagnetic valve (2) 7, a high-pressure inlet at the upper end of the four-way electromagnetic valve (2) is communicated with a right outlet at the lower end of the four-way electromagnetic valve (2) and the variable frequency compressor (1) is started, and a right outlet at the lower end of the four-way electromagnetic valve (2) is communicated with a metal pipe fin heat exchanger through the refrigerant electromagnetic valve (1) 3); the metal tube fin heat exchanger is a condenser, high-temperature and high-pressure refrigerant gas releases heat in the metal tube fin heat exchanger, the gas changes into liquid phase transition to release heat, the temperature of the metal tube fin heat exchanger is higher than the ambient temperature, and the heat exchange fan blows heat energy of the metal tube fin heat exchanger into a room to realize heating; the process is an exothermic process; the released heat is blown into a room by a fan for heating; the total heat is equal to the physical working heat of the buried water collection carrying heat and the compressor; then high-pressure refrigerant liquid from the metal tube fin heat exchanger enters an electronic throttle valve (8) through a refrigerant electromagnetic valve (2) (7), absorbs heat in a coil pipe of a spiral metal sleeve heat exchanger (9) in a diffusion way, and the liquid is changed into low-pressure refrigerant gas; the spiral metal sleeve heat exchanger (9) is an evaporator; the low-pressure refrigerant gas is connected with the inlet of the gas-liquid separator through the left inlet and the middle outlet pipeline at the lower end of the four-way electromagnetic valve (2), and the outlet pipeline of the gas-liquid separator is connected with the inlet of the variable frequency compressor (1) to complete circulation. And the control module of the ground source heat pump double-pipe multi-connected unit system improves the frequency of the variable frequency compressor (1) and increases heating power.

Cooling mode: the ambient temperature of the summer room is higher than the water temperature of the buried water collector (11), and the multi-connected unit starts a refrigeration mode. A user starts a ground source heat pump double-pipe multi-unit system in the multi-unit system, a user electromagnetic valve and a heat exchange fan of the user are opened, a control module of the ground source heat pump double-pipe multi-unit system starts a variable frequency compressor (1) and a water pump (10) of a buried water collector (11), the control module reversely opens an electronic throttle valve (8), a refrigerant electromagnetic valve 1 (3) and a refrigerant electromagnetic valve 2 (7), a high-pressure inlet at the upper end of the four-way electromagnetic valve (2) is communicated with a left outlet at the lower end of the four-way electromagnetic valve (2), the variable frequency compressor (1) is started, and a left outlet at the lower end of the four-way electromagnetic valve (2) is started

A fin heat exchanger is communicated with the metal tube; the metal tube fin heat exchanger is a condenser, high-temperature and high-pressure refrigerant gas releases heat in the metal tube fin heat exchanger, the gas changes into liquid phase transition to release heat, the temperature of the metal tube fin heat exchanger is higher than the ambient temperature, and the heat exchange fan blows heat energy of the metal tube fin heat exchanger into a room to realize heating; the process is an exothermic process; the released heat is blown into a room by a fan for heating; the total heat is equal to the physical working heat of the buried water collection carrying heat and the compressor; then high-pressure refrigerant liquid from the metal tube fin heat exchanger enters an electronic throttle valve (8) through a refrigerant electromagnetic valve (2) (7), absorbs heat in a coil pipe of a spiral metal sleeve heat exchanger (9) in a diffusion way, and the liquid is changed into low-pressure refrigerant gas; the spiral metal sleeve heat exchanger (9) is an evaporator; the low-pressure refrigerant gas is connected with the inlet of the gas-liquid separator through the left inlet and the middle outlet pipeline at the lower end of the four-way electromagnetic valve (2), and the outlet pipeline of the gas-liquid separator is connected with the inlet of the variable frequency compressor (1) to complete circulation. And the control module of the ground source heat pump double-pipe multi-connected unit system improves the frequency of the variable frequency compressor (1) and increases heating power.

Cooling mode: the ambient temperature of the summer room is higher than the water temperature of the buried water collector (11), and the multi-connected unit starts a refrigeration mode. A user starts a ground source heat pump double-pipe multi-unit system in the multi-unit system, a user electromagnetic valve and a heat exchange fan of the user are opened, a control module of the ground source heat pump double-pipe multi-unit system starts a variable frequency compressor (1) and a water pump (10) of a buried water collector (11), the control module reversely opens an electronic throttle valve (8), a refrigerant electromagnetic valve 1 (3) and a refrigerant electromagnetic valve 2 (7), the control module controls the upper end high-pressure inlet of the four-way electromagnetic valve (2) to be communicated with the left outlet of the lower end of the four-way electromagnetic valve (2), the left outlet of the lower end of the four-way electromagnetic valve (2) is communicated with a coil pipe of a spiral metal sleeve heat exchanger (9), and the spiral metal sleeve heat exchanger (9) is a condenser at the moment; the high-temperature and high-pressure refrigerant gas is phase-changed into high-pressure liquid in the coil pipe of the spiral metal sleeve heat exchanger (9), and the released heat is brought into the buried water collector (11) by the water quantity in the spiral sleeve; the control module starts the water pump (10), the water pump (10) pumps water from the buried water collector (11) to pass through the heat exchange sleeve of the spiral metal sleeve heat exchanger (9), and the water flows back to the buried water collector (11) again to take away the heat of the condenser; the high-pressure liquid passes through the electronic throttle valve (8) and then diffuses and passes through the refrigerant electromagnetic valve (2) (7), and diffuses and absorbs heat in the metal tube fin heat exchanger, so that the refrigerant high-pressure liquid absorbs heat and changes into refrigerant low-pressure gas; the metal tube fin heat exchanger is an evaporator at the moment, and the temperature of the metal tube fin heat exchanger is lower than the ambient temperature; the evaporation process is an endothermic process; negative heat in the heat absorption process is blown into a room by a fan to cool; the refrigerant low-pressure gas passes through a user electromagnetic valve and a refrigerant electromagnetic valve 1 (3) to a right interface at the lower end of the four-way electromagnetic valve (2); the right side interface at the lower end of the four-way electromagnetic valve (2) is connected with the middle interface at the lower end of the four-way electromagnetic valve (2), the middle interface at the lower end of the four-way electromagnetic valve (2) is connected with the inlet of the gas-liquid separator, the outlet of the gas-liquid separator is connected with the inlet of the variable frequency compressor (1), and low-pressure steam enters the compressor again through the gas-liquid separator to complete circulation.

Claims

1. The multi-connected unit device utilizing the heat energy of the earth shallow layer is characterized in that the multi-connected unit system is divided into a ground source heat pump unit, a double pipe and a multi-connected unit, the ground source heat pump unit is arranged in a machine room of a buried water collector, a heat exchange unit of the multi-connected unit is arranged in a room elsewhere, pipelines among the plurality of heat exchange units are connected in parallel, and the ground source heat pump unit is connected with the multi-connected unit in a sealing way through the double pipe; the user units 1 (4), the user units 2 (5), the user units 3 (6) and more user units are connected in parallel; the ground source heat pump unit comprises a variable frequency compressor (1), a four-way electromagnetic valve (2), a refrigerant electromagnetic valve 1 (3), a refrigerant electromagnetic valve 2 (7), an electronic throttle valve (8), a spiral metal sleeve heat exchanger (9), a water pump (10), an underground water collector (11), a gas-liquid separator and a control module; the air outlet of the variable frequency compressor (1) is hermetically connected with a high-pressure air inlet of the four-way electromagnetic valve (2), the air outlet on the right side of the four-way electromagnetic valve (2) is hermetically connected with the refrigerant electromagnetic valve (1) (3), the refrigerant electromagnetic valve (1) (3) is hermetically connected with a multi-connected unit through a pipeline, the multi-connected unit is hermetically connected with the refrigerant electromagnetic valve (2) (7) through a pipeline, the refrigerant electromagnetic valve (2) (7) is hermetically connected with one end of a coil (9.1) of the spiral metal sleeve heat exchanger (9), the other end of the coil (9.1) of the spiral metal sleeve heat exchanger is hermetically connected with the left side outlet of the four-way electromagnetic valve (2), the middle outlet of the four-way electromagnetic valve (2) is hermetically connected with the inlet end of the gas-liquid separator, and the outlet end of the gas-liquid separator is hermetically connected with the inlet of the variable frequency compressor (1); one end of a sleeve of the spiral metal sleeve heat exchanger (9) is hermetically connected with one end of a U-shaped water return pipe (11.2) of the buried water collector (11), the other end of the U-shaped water return pipe (11.2) of the buried water collector (11) is hermetically connected with a water inlet end of a water pump (10), and a water outlet end of the water pump (10) is hermetically connected with the other end of the sleeve of the spiral metal sleeve heat exchanger (9); the multi-user heat exchanger unit comprises a plurality of user heat exchanger units which are connected in parallel; the user heat exchange unit comprises a user electromagnetic valve, a user heat exchange fan and a user metal tube fin heat exchanger; one end of a user electromagnetic valve (4.1) is connected with a refrigerant electromagnetic valve 1 (3) in a sealing way through a pipeline, the other end of the user electromagnetic valve (4.1) is connected with one end of a metal tube fin heat exchanger (4.3) in a sealing way, the other end of the metal tube fin heat exchanger (4.3) is connected with a refrigerant electromagnetic valve 2 (7) in a sealing way through a pipeline, and a heat exchange fan (4.2) is arranged behind the metal tube fin heat exchanger (4.3);

the control module circuit is connected with the variable-frequency compressor (1), the four-way electromagnetic valve (2), the refrigerant electromagnetic valve 1 (3), the refrigerant electromagnetic valve 2 (7), the electronic throttle valve (8), the water pump (10), a plurality of user electromagnetic valves and a plurality of unit heat exchange fans; the underground water collector (11) comprises a plurality of ground source wells and a plurality of U-shaped water return pipes; the U-shaped water return pipe is arranged in the ground source well, and the water temperature in the U-shaped water return pipe is the same as the water temperature of the ground source well; one end of the U-shaped water return pipes is connected in parallel with a water outlet of the buried water collector (11) and is connected with a water pump (10), and the other end of the U-shaped water return pipes is a sleeve pipe of which the water return port of the buried water collector (11) is connected with a coil heat exchanger; the metal tube fin heat exchanger is characterized in that metal fins which are closely contacted with a metal tube are arranged around the metal tube, so that the surface area of the metal tube is enlarged, heat dissipation is accelerated, and the metal tube and the metal fins are preferably made of copper; after the metal tube fin heat exchanger is arranged at the air outlet of the heat exchanger box body, the size of the metal tube fin heat exchanger is matched with the air outlet of the heat exchanger box body, a fan is arranged behind the metal tube fin heat exchanger, the fan sucks air from the air inlet at the upper part of the heat exchanger box body, and the fan blows air to the room through the metal tube fin heat exchanger and the air outlet at the lower part of the heat exchanger box body; the spiral metal sleeve heat exchanger (9) is characterized in that a metal coil is sleeved outside a metal sleeve to manufacture a spiral coil shape integrally, one end of the metal coil is connected with one end of an electronic throttle valve (8), the other end of the metal coil is connected with a left side interface of a four-way electromagnetic valve (2), and refrigerant is introduced into the metal coil; one end of the metal sleeve is connected with the water outlet of the water pump (10), the water inlet of the water pump (10) is connected with the water outlet of the buried water collector (11), and the water return port of the buried water collector (11) is connected with the other end of the heat exchange sleeve;

preferably, the spiral coil pipe and the sleeve pipe are made of copper, so that the heat exchange slope is improved; the high-pressure outlet of the compressor is connected with the high-pressure inlet at the upper end of the four-way electromagnetic valve (2), the right-side outlet at the lower end of the four-way electromagnetic valve (2) is connected with the refrigerant electromagnetic valve 1 (3), the other end of the refrigerant electromagnetic valve 1 (3) is connected with the user electromagnetic valve, the user electromagnetic valve is connected with one end of the metal tube fin heat exchanger, the other end of the metal tube fin heat exchanger is connected with the refrigerant electromagnetic valve 2 (7), the refrigerant electromagnetic valve 2 (7) is connected with the electronic throttle valve (8), the other end of the electronic throttle valve (8) is connected with the coil of the spiral metal sleeve heat exchanger (9), the other end of the coil of the spiral metal sleeve heat exchanger (9) is connected with the left-side interface at the lower side of the four-way electromagnetic valve (2), and the middle-side interface at the lower side of the four-way electromagnetic valve (2) is connected with the inlet of the gas-liquid separator; the outlet of the gas-liquid separator is connected with the inlet of the compressor.