CN112648687A

CN112648687A - Control device for keeping long-term heat balance at ground source side of ground source heat pump central air-conditioning system

Info

Publication number: CN112648687A
Application number: CN202011501352.7A
Authority: CN
Inventors: 于海涛; 李多德; 梁士魁; 李磊; 李春杰
Original assignee: ANHUI TULIP NEW ENERGY TECH CO LTD
Current assignee: ANHUI TULIP NEW ENERGY TECH CO LTD
Priority date: 2020-12-17
Filing date: 2020-12-17
Publication date: 2021-04-13

Abstract

The invention provides a control device for keeping long-term heat balance at the ground source side of a ground source heat pump central air-conditioning system, which relates to the field of ground source heat pumps and comprises an electric control box, wherein the electric control box is electrically connected with a temperature sensor, the electric control box is electrically connected with a first electric three-way valve and a second electric three-way valve, the first electric three-way valve is respectively communicated with an air suction pipe, a first air supply pipe and a second air supply pipe, the second electric three-way valve is respectively communicated with a water suction pipe, a first water supply pipe and a second water supply pipe, the first air supply pipe is communicated with a condenser of the ground source heat pump, the second air supply pipe is communicated with an evaporator, the first water supply pipe is communicated with the evaporator, the second water supply pipe is communicated with the condenser, the water suction pipe is connected with a buried pipe through a water pump, underground heat collection or heat supply to the ground is, meanwhile, the device has simple structure and lower cost.

Description

Control device for keeping long-term heat balance at ground source side of ground source heat pump central air-conditioning system

Technical Field

The invention relates to the field of ground source heat pumps, in particular to a control device for keeping long-term heat balance on the ground source side of a ground source heat pump central air-conditioning system.

Background

The ground source heat pump technology is one of three technical measures of national building equipment energy conservation regulation, and has the basic working principle that: the summer heat pump units discharge waste heat to the underground or the cooling tower when producing chilled water (meeting the requirements of end users), and the winter heat pump units discharge waste cold to the underground when producing hot water (meeting the requirements of end users). However, climatic conditions are different in various regions of China, the cold quantity required by the buildings in summer is different from the hot quantity required by the buildings in winter, for example, the cold quantity required by the buildings in summer in the middle and lower reaches of Yangtze river is 2 times of the hot quantity required by the buildings in winter, if waste heat (cold) is completely discharged to the underground, the underground temperature is unbalanced for a long time, the operation effect of an air conditioner is influenced if the waste heat (cold) is completely discharged to the underground, and the underground thermal pollution is caused if the waste heat (cold) is serious.

Patent No. CN103776120B discloses an underground heat balance and heat exchange device of a ground source heat pump air conditioning system, which comprises a control cabinet, a cooling tower, an air conditioner refrigerant water collector, an air conditioner refrigerant water separator, a plurality of water pumps, a plurality of ground source heat pump units, a soil source water separator, a plurality of ground source well groups, a plurality of switch valves, a soil source water collector, a plurality of temperature sensors and a plurality of flow sensors. A complete underground temperature monitoring system is established by a control cabinet, a series of flow sensors and temperature sensors, and the operating ground source well groups can be reasonably selected according to the temperature and flow changes of each ground source well group. The control cabinet can adjust the operation strategy in time according to the change of the underground temperature, the heat absorption and heat release capacity of the ground source is maximally used on the premise that the underground temperature is not unbalanced, the working efficiency of the ground source heat pump air conditioning system is improved and the energy consumption is reduced on the premise that the underground heat pollution is not generated.

However, in the prior art, a plurality of water pumps and a plurality of ground source heat pump units are adopted, so that the equipment cost is increased and the energy consumption is increased.

Disclosure of Invention

The invention aims to provide a control device for keeping long-term heat balance on the ground source side of a ground source heat pump central air-conditioning system, so as to solve the technical problem.

In order to solve the technical problems, the invention adopts the following technical scheme: the control device for keeping long-term heat balance at the ground source side of the ground source heat pump central air-conditioning system comprises an electric cabinet, wherein the electric cabinet is electrically connected with a temperature sensor, the electric cabinet is electrically connected with a first electric three-way valve and a second electric three-way valve, the first electric three-way valve is respectively communicated with an air suction pipe, a first air supply pipe and a second air supply pipe, the second electric three-way valve is respectively communicated with a water suction pipe, a first water supply pipe and a second water supply pipe, the first air supply pipe is communicated with a condenser of the ground source heat pump, the second air supply pipe is communicated with an evaporator, the first water supply pipe is communicated with the evaporator, the second water supply pipe is communicated with the condenser, and the water suction pipe is connected with a buried pipe through.

Preferably, first electric three-way valve, second electric three-way valve are the same in structure, first electric three-way valve includes the valve casing with breathing pipe, first air supply pipe, second air supply pipe intercommunication respectively, the valve casing internal rotation is connected with the valve post, be provided with the tee bend runner on the valve post, the coaxial fixed connection of output shaft of valve post and electric valve motor, electric valve motor is fixed in the valve casing tip, and electric valve motor's output shaft runs through the valve casing and is connected with the valve casing rotation.

Preferably, the valve casing is cylindrical, the valve column is cylindrical, and the cross section of the three-way flow passage is T-shaped.

Preferably, the end part of the valve rod is provided with a clamping groove, and the clamping groove is inserted into a clamping rod which is connected with the end part of the valve casing in a sliding manner.

Preferably, the condenser includes a condenser box, a condenser pipe is fixedly connected in the condenser box, the first air supply pipe is sleeved on the outside of the condenser pipe, and the second water supply pipe is sleeved on the outside of the condenser pipe.

Preferably, the part that first air supply pipe is located the condensing box includes with the outer first air supply pipe fixed connection's of condensing box interior half pipe, interior half pipe is connected with outer half pipe coaxial rotation, outer half pipe tip rotates with the first air supply pipe that is located the condensing box outside to be connected, outer half pipe is connected with the air feed motor transmission.

Preferably, one end of the outer half pipe, which is positioned outside the condenser box, is fixedly connected with a driven gear, the driven gear is meshed with a driving gear fixedly connected to an output shaft of the air supply motor, and the air supply motor is in transmission connection with the electric cabinet.

Preferably, the evaporator comprises an evaporation box, an evaporation tube is fixedly connected in the evaporation box, a first water supply tube is sleeved outside the evaporation tube, a second air supply tube is sleeved outside the first water supply tube, the first water supply tube and the first air supply tube have the same structure, and the first water supply tube is in transmission connection with a water supply motor fixedly connected outside the evaporation box.

The invention has the beneficial effects that:

in the present invention, first, second, and finally.

1. The first electric three-way valve is connected with the air suction pipe, the first air supply pipe and the second air supply pipe, the electric cabinet controls the opening direction of the first electric three-way valve so as to determine the flow direction of external air, the second electric three-way valve is respectively connected with the water suction pipe, the first water supply pipe and the second water supply pipe, and the electric cabinet controls the opening direction of the second electric three-way valve so as to determine the flow direction of underground water, underground heat collection or heat supply is determined according to the outside air temperature, underground temperature imbalance caused by underground heat collection is avoided, meanwhile, the device is simple in structure and low in cost;

2. the first electric three-way valve is set to be a cylindrical valve core structure, a flow channel with a T-shaped section is arranged on the side face driven by the motor to rotate to control a passage or an open circuit among the air suction pipe, the first air supply pipe and the second air supply pipe, and a clamping rod in sliding connection is arranged at the end part of the valve shell to be spliced with the valve core, so that the valve core of the first electric three-way valve can be kept fixed after rotating, and the valve core is prevented from being impacted to have a rotating tendency to cause the damage of the motor;

3. the part of the first air supply pipe in the condensing box and the part of the first water supply pipe in the evaporating box are set to be in the mode that the inner half pipe and the outer half pipe rotate coaxially, the first air supply pipe is controlled to be opened or closed through the air supply motor, air supply or water supply in the condensing box is achieved, the first water supply pipe is controlled to be opened or closed through the water supply motor, air supply or water supply in the evaporating box is achieved, and therefore the mode of switching from heat collection at the bottom of the ground to heat supply at the bottom of the ground is achieved.

Drawings

FIG. 1 is a front view of the present invention;

FIG. 2 is a schematic perspective view of the present invention;

FIG. 3 is a partial cross-sectional view of a first electrically operated three-way valve of the present invention;

FIG. 4 is a cross-sectional view of the condenser case of the present invention;

FIG. 5 is a sectional view of the first air supply pipe and the second water supply pipe of the present invention;

reference numerals: 1. a central air conditioner; 2. a condenser tank; 201. a second water supply pipe; 202. a sealing plate; 203. a condenser tube; 3. an evaporator; 4. an expansion valve; 5. a compressor; 6. a first electric three-way valve; 601. an air intake duct; 602. a first gas supply pipe; 6021. an inner half pipe; 6022. an outer half pipe; 603. a second gas supply pipe; 604. an electric valve motor; 605. a valve core; 6051. a three-way flow passage; 606. a valve housing; 607. a clamping rod; 7. a second electric three-way valve; 701. a suction pipe; 702. a first water supply pipe; 8. a water pump; 9. a driven gear; 10. a working medium flow passage; 11. a water return pipe; 12. and (4) exhausting the gas.

Detailed Description

In order to make the technical means, the original characteristics, the achieved purposes and the effects of the invention easily understood, the invention is further described below with reference to the specific embodiments and the attached drawings, but the following embodiments are only the preferred embodiments of the invention, and not all embodiments. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative efforts belong to the protection scope of the present invention.

Specific embodiments of the present invention are described below with reference to the accompanying drawings.

Example 1

As shown in fig. 1, the control device for maintaining long-term thermal balance at the ground source side of the ground source heat pump central air-conditioning system comprises an electric cabinet, the electric cabinet is electrically connected with a temperature sensor, the electric cabinet is electrically connected with a first electric three-way valve 6 and a second electric three-way valve 7, the first electric three-way valve 6 is respectively communicated with an air suction pipe 601, a first air supply pipe 602 and a second air supply pipe 603, the second electric three-way valve 7 is respectively communicated with a water suction pipe 701, a first water supply pipe 702 and a second water supply pipe 201, the first air supply pipe 602 is communicated with a condenser of the ground source heat pump, the second air supply pipe 603 is communicated with an evaporator 3, the first water supply pipe 702 is communicated with the evaporator 3, the second water supply pipe 201 is communicated with the condenser, the water suction pipe 701 is connected with a buried pipe through a water pump 8, the first electric three-way valve 6 and the second electric, First air supply pipe 602, the valve casing 606 of second air supply pipe 603 intercommunication, the internal rotation of valve casing 606 is connected with the valve column, be provided with tee bend runner 6051 on the valve column, the coaxial fixed connection of output shaft of valve column and motorised valve motor 604, motorised valve motor 604 is fixed in valve casing 606 tip, the output shaft of motorised valve motor 604 runs through valve casing 606 and is connected with the rotation of valve casing 606, valve casing 606 shape is the drum type, the valve column shape is cylindrical, tee bend runner 6051's cross-section is the T shape, the valve column tip is provided with the draw-in groove, the draw-in groove is pegged graft with valve casing 606 tip sliding connection.

When the outside air temperature is too low, the central air conditioner 1 heats, the first electric three-way valve 6 enables the first air suction pipe 601 to be communicated with the first air supply pipe 602, the other flow passage of the three-way flow passage 6051 is sealed by the inner wall of the valve shell 606, when the central air conditioner 1 sucks air, the air enters the central air conditioner 1 through the first air supply pipe, the water suction pipe 701 in the second electric three-way valve 7 is communicated with the first water supply pipe 702, the other flow passage of the three-way flow passage 6051 in the second electric three-way valve 7 is sealed by the inner end of the valve shell 606, the water pump 8 works to pump the groundwater, the water flows enter the evaporator 3 through the water suction pipe 701 and the first water supply pipe 702, the compressor 5 and the expansion valve 4 work to enable the working medium to circulate in the working medium flow passage 10, the working medium expanded by the expansion valve 4 exchanges heat with the evaporator 3 and then, the working medium enters the condenser to exchange heat with the air flow in the first air supply pipe, the hot air flows through the exhaust pipe 12 to enter the central air conditioner 1, and the central air conditioner 1 distributes hot air flow to a place needing heating; when the outside air temperature is high, the first electric valve rotates at the moment, so that the air suction pipe 601 is communicated with the second air supply pipe 603, the electric valve motor 604 of the second electric valve drives the valve core 605 to rotate, the water suction pipe 701 is communicated with the second water supply pipe 201, meanwhile, the first air supply pipe 602 and the first water supply pipe 702 are sealed, the air flow enters the central air conditioner 1 through the water suction pipe 701, the second air supply pipe 603 in the evaporation tank and the exhaust pipe 12, the underground water flows through the water suction pipe 701, the second water supply pipe 201 and the return pipe 11, the working medium in the working medium flow channel 10 absorbs the heat in the air in the evaporation tank, the heat is compressed by the compressor 5 to form a high-temperature and high-pressure state, the heat exchanges heat with the underground water in the condenser and then flows back to the underground through the return pipe 11, the process is realized by monitoring the outside temperature by the temperature sensor, and controlling, the heat pump is convenient, heat can be pumped to the ground bottom or collected by the ground bottom at any time according to the external temperature, the heat pump can be realized only by a single set of ground source heat pump equipment, and the operation cost is low.

Example 2

As shown in fig. 1-4, the control device for maintaining long-term thermal balance at the ground source side of a ground source heat pump central air-conditioning system comprises an electric cabinet, the electric cabinet is electrically connected to a temperature sensor, the electric cabinet is electrically connected to a first electric three-way valve 6 and a second electric three-way valve 7, the first electric three-way valve 6 is respectively communicated with an air suction pipe 601, a first air supply pipe 602 and a second air supply pipe 603, the second electric three-way valve 7 is respectively communicated with a water suction pipe 701, a first water supply pipe 702 and a second water supply pipe 201, the first air supply pipe 602 is communicated with a condenser of the ground source heat pump, the second air supply pipe 603 is communicated with an evaporator 3, the first water supply pipe 702 is communicated with the evaporator 3, the second water supply pipe 201 is communicated with the condenser, the water suction pipe 701 is connected with a buried pipe through a water pump 8, the condenser comprises a condenser tank 2, a condenser pipe 203 is fixedly connected, the second water supply pipe 201 is sleeved outside the condensation pipe 203, the part of the first air supply pipe 602 located in the condensation box 2 comprises an inner half pipe 6021 fixedly connected with the first air supply pipe 602 outside the condensation box 2, the inner half pipe 6021 is coaxially and rotatably connected with the outer half pipe 6022, the end part of the outer half pipe 6022 is rotatably connected with the first air supply pipe 602 outside the condensation box 2, the outer half pipe 6022 is in transmission connection with an air supply motor, one end of the outer half pipe 6022 located outside the condensation box 2 is fixedly connected with a driven gear 9, the driven gear 9 is meshed with a driving gear fixedly connected with an output shaft of the air supply motor, the air supply motor is in transmission connection with the electric cabinet, the evaporator 3 comprises an evaporation box, an evaporation pipe is fixedly connected in the evaporation box, the outer side of the evaporation box is sleeved with the first water supply pipe 702, the outer side of the first water supply pipe 702 is sleeved with the second air supply pipe 603, the first water supply pipe 702 is identical in structure with the first air supply pipe 602, and the first water supply.

The condenser 203 is fixedly connected in the condenser box 2, the evaporator is fixedly connected in the evaporator box, the first air supply pipe 602 is coaxially and rotatably connected with the outer half pipe 6022 and the inner half pipe 6021, when the ground source heat pump is switched from the ground heat collection to the ground heat pump, the second water supply pipe 201 is required to be in contact with the condenser 203, and the second air supply pipe 603 is required to be in contact with the evaporator, at this time, the first water supply pipe 702 and the first air supply pipe 602 should be opened, the outer half pipe 6022 is rotatably connected with the condenser box 2, the opening purpose can be realized, the opening mode is controlled by an air supply motor fixed on the side surface of the condenser box 2, a driving gear connected with the air supply motor is meshed with a driven gear 9 connected with the end part of the outer half pipe 6022, the outer half pipe 6022 is rotated, so that the cavity between the second water supply pipe 201 and the condenser 203 is supplied with water, and similarly, the first water supply pipe 702 in the evaporator 3 is opened, so that the cavity between the second air supply pipe 603 and the evaporator, the realization is changed into to the heat supply in the groundwater by the groundwater heat absorption, realize ground source side thermal side heat balance, and at the in-process of changing repeatedly, groundwater can be to condenser pipe 203, the evaporating pipe erodees, avoid the dust adhesion in the air to lead to the heat exchange inefficiency on condenser pipe 203, the evaporating pipe, the sealed rotation of sealed plate 202 and the first air supply pipe 602 end that is located condenser box 2 inside portion is connected condenser pipe 203, the first air supply pipe 602 of condenser box 2 outside portion runs through sealed plate 202 and with sealed plate 202 fixed connection.

The working principle is as follows: according to the invention, a temperature sensor is used for detecting the ambient temperature of air, when the air temperature is low, a water suction pipe 701 in a ground source heat pump is communicated with a first water supply pipe 702, a gas suction pipe 601 is communicated with a first gas supply pipe 602, water flow exchanges heat with a working medium in an evaporator 3, the working medium exchanges heat with air flow in a condenser, and the heat of underground water is absorbed into the air flow required by a central air conditioner 1; when the air temperature is higher, the water suction pipe 701 is communicated with the second air supply pipe 603, the air suction pipe 601 is communicated with the second air supply pipe 603, the air flow and the working medium exchange heat in the evaporation box, the working medium and the water flow exchange heat in the condenser, the heat pump in the air flow is pumped into underground water, the heat loss during the heat supply of the underground water is balanced, the switching is convenient, and the heat efficiency is high.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. Keep the long-term heat balance's of ground source heat pump central air conditioning system ground source side controlling means, including the electric cabinet, its characterized in that: the electric cabinet is electrically connected with the temperature sensor, the electric cabinet is electrically connected with a first electric three-way valve (6) and a second electric three-way valve (7), the first electric three-way valve (6) is respectively communicated with an air suction pipe (601), a first air supply pipe (602) and a second air supply pipe (603), the second electric three-way valve (7) is respectively communicated with a water suction pipe (701), a first water supply pipe (702) and a second water supply pipe (201), the first air supply pipe (602) is communicated with a condenser of a ground source heat pump, the second air supply pipe (603) is communicated with an evaporator (3), the first water supply pipe (702) is communicated with the evaporator (3), the second water supply pipe (201) is communicated with the condenser, and the water suction pipe (701) is connected with a buried pipe through a water pump (8).

2. The control device for maintaining long-term heat balance on the ground source side of a ground source heat pump central air-conditioning system according to claim 1, is characterized in that: first electric three-way valve (6), second electric three-way valve (7) structure are the same, first electric three-way valve (6) are including respectively with valve casing (606) of breathing pipe (601), first air supply pipe (602), second air supply pipe (603) intercommunication, valve casing (606) internal rotation is connected with the valve post, be provided with tee bend runner (6051) on the valve post, the coaxial fixed connection of output shaft of valve post and motorised valve motor (604), motorised valve motor (604) are fixed in valve casing (606) tip, and the output shaft of motorised valve motor (604) runs through valve casing (606) and rotates with valve casing (606) to be connected.

3. The control device for maintaining long-term heat balance on the ground source side of a ground source heat pump central air-conditioning system according to claim 2, is characterized in that: the valve casing (606) shape is the cylinder type, the valve column shape is cylindrical, and the cross-section of tee bend runner (6051) is the T shape.

4. The control device for maintaining long-term heat balance on the ground source side of a ground source heat pump central air-conditioning system according to claim 3, characterized in that: the valve rod end is provided with the draw-in groove, the draw-in groove is pegged graft with valve casing (606) tip sliding connection's kelly (607).

5. The control device for maintaining long-term heat balance on the ground source side of a ground source heat pump central air-conditioning system according to claim 1, is characterized in that: the condenser comprises a condensation box (2), a condensation pipe (203) is fixedly connected in the condensation box (2), a first air supply pipe (602) is sleeved on the outer side of the condensation pipe (203), and a second water supply pipe (201) is sleeved on the outer side of the condensation pipe (203).

6. The control device for maintaining long-term heat balance on the ground source side of a ground source heat pump central air-conditioning system according to claim 5, is characterized in that: the part of the first air supply pipe (602) positioned in the condensation box (2) comprises an inner half pipe (6021) fixedly connected with the first air supply pipe (602) outside the condensation box (2), the inner half pipe (6021) is coaxially and rotatably connected with an outer half pipe (6022), the end part of the outer half pipe (6022) is rotatably connected with the first air supply pipe (602) positioned outside the condensation box (2), and the outer half pipe (6022) is in transmission connection with an air supply motor.

7. The control device for maintaining long-term heat balance on the ground source side of a ground source heat pump central air-conditioning system according to claim 6, characterized in that: one end of the outer half pipe (6022) outside the condensation box (2) is fixedly connected with a driven gear (9), the driven gear (9) is meshed with a driving gear fixedly connected to an output shaft of an air supply motor, and the air supply motor is in transmission connection with the electric cabinet.

8. The control device for maintaining long-term heat balance on the ground source side of a ground source heat pump central air-conditioning system according to claim 1, is characterized in that: the evaporator (3) comprises an evaporation box, an evaporation pipe is fixedly connected in the evaporation box, a first water supply pipe (702) is sleeved on the outer side of the evaporation pipe, a second air supply pipe (603) is sleeved on the outer side of the first water supply pipe (702), the first water supply pipe (702) is identical to the first air supply pipe (602) in structure, and the first water supply pipe (702) is in transmission connection with a water supply motor fixedly connected on the outer side of the evaporation box.