CN117739399A - Control method for improving heating effect of multi-split water-free floor heating system - Google Patents
Control method for improving heating effect of multi-split water-free floor heating system Download PDFInfo
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- CN117739399A CN117739399A CN202311640803.9A CN202311640803A CN117739399A CN 117739399 A CN117739399 A CN 117739399A CN 202311640803 A CN202311640803 A CN 202311640803A CN 117739399 A CN117739399 A CN 117739399A
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 68
- 230000000694 effects Effects 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000003507 refrigerant Substances 0.000 claims abstract description 28
- 239000007788 liquid Substances 0.000 claims abstract description 18
- 238000000926 separation method Methods 0.000 abstract description 3
- 238000010521 absorption reaction Methods 0.000 abstract description 2
- 238000001704 evaporation Methods 0.000 abstract description 2
- 230000008020 evaporation Effects 0.000 abstract description 2
- 238000009825 accumulation Methods 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000002045 lasting effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
The invention relates to a control method for improving heating effect of a multi-split water-free floor heating system, in a single-opening floor heating mode, refrigerant is compressed by a compressor, enters the indoor side through an air pipe after passing through a four-way valve, flows through an indoor unit and the water-free floor heating, becomes medium-temperature high-pressure liquid after being condensed, becomes low-temperature low-pressure liquid after being throttled by an electronic expansion valve, then enters an external heat exchanger for evaporation and heat absorption, becomes low-temperature low-pressure gas, and returns to the compressor for repeated circulation through gas separation. In the process, the electric ball valve in the energy-saving module is firstly opened, and the expansion valve of the inner machine is simultaneously opened, so that the refrigerant flows through the indoor machine, the electric ball valve is closed after a period of time, the expansion valve of the inner machine is closed to a certain opening degree, and the expansion valve of the inner machine is completely closed again after the closing condition is reached, so that the quantity of the refrigerant stored in the indoor machine is reduced, and the heating effect of the floor heating is improved.
Description
Technical Field
The invention relates to the technical field of air conditioner floor heating, in particular to a control method for improving heating effect of a multi-split water-free floor heating system.
Background
In the market of the existing multi-split air conditioner matched with the anhydrous floor heating (the ceiling fluorine system), in order to meet the requirements of air conditioning and the use of the anhydrous floor heating, customers often need to add more refrigerants and increase the use cost, and under the use scene that the air conditioning heating is not performed by the single-split anhydrous floor heating, a plurality of system refrigerants are accumulated in the internal machine, so that the anhydrous floor heating effect is poor, and the power consumption is increased.
Aiming at the problems, the multi-split air conditioner system can be matched with an energy-saving module, can increase the circulation quantity of the refrigerant, reduce the heat loss of the main heating mode indoor unit, the air conditioner has the advantages that the air conditioner can improve the heating effect in single-opening floor heating, simultaneously can reduce the filling amount of refrigerants, saves cost, and reduces the problem of poor refrigerating effect caused by higher system high pressure in unit refrigerating. The working principle of the energy-saving module is as follows: the copper pipe behind the air pipe stop valve of the outdoor unit is divided into two paths, one path is connected with the branch pipe of the indoor air pipe machine, and the energy-saving module is installed on the path. The refrigerant flows through the energy-saving module and then enters each indoor unit, and the other path enters the water-free floor heating. When the indoor air pipe machine needs to refrigerate or heat, the electric ball valve in the energy-saving module is completely opened, and the refrigerant can enter the indoor machine to refrigerate or heat. When only single-opening water-free floor heating is needed, the electric ball valve in the energy-saving module can be completely closed, so that the refrigerant enters the floor heating pipe.
However, the control of the energy-saving module is still immature, if the closing sequence of the electric ball valve and the internal machine valve in the energy-saving module cannot be reasonably controlled (the current product is provided by a main control, the energy-saving module and the internal machine valve are simultaneously closed, but the number of steps of the internal machine valve is 480, but the number of steps of the electric ball valve is 2800, the closing time of the internal machine valve is shorter than that of the electric ball valve), and the standby internal machine valve has a certain opening degree, so that the internal machine effusion (the refrigerant cannot flow through the internal machine in time and is accumulated in the internal machine) can be caused in the running process of the unit, thereby reducing the flow of the refrigerant entering the floor heating, reducing the heating effect of the floor heating and causing poor feeling of customers. And the high voltage of the system can not be improved, and the power consumption is increased.
Disclosure of Invention
In order to solve the problems, the invention aims to provide a control method for improving the heating effect of a multi-split water-free floor heating system, which can optimize the closing of an energy-saving module and the closing control of an inner machine valve so as to reduce the amount of refrigerant stored in an indoor machine and improve the heating effect of the floor heating.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
a control method for improving heating effect of a multi-split water-free floor heating system is characterized by comprising the following steps of: the multi-split water-free floor heating system comprises a controller, and a compressor, a four-way valve, a plurality of indoor units and a condenser which sequentially form a refrigerant main loop, wherein an air pipe is connected to the four-way valve, the other end of the air pipe is communicated with a main pipe of a first branch pipe, a plurality of first branch pipes of the first branch pipe are respectively communicated with inlet ends of the plurality of indoor units, an air pipe stop valve is arranged on the air pipe, an energy-saving module is communicated between the air pipe and the first branch pipe, a first connecting pipe is connected to the air pipe between the air pipe stop valve and the energy-saving module, a floor heating coil pipe is connected to the first connecting pipe, a second connecting pipe is connected to the other end of the floor heating coil pipe, the other end of the second connecting pipe is communicated with the main pipe of the second branch pipe, the other end of the main pipe of the second branch pipe is connected with a liquid pipe stop valve, and a plurality of second branch pipes of the second branch pipes are respectively communicated with outlet ends of the plurality of indoor units;
an outdoor temperature sensor is arranged at the outer side of the condenser;
the first branch pipes are provided with air pipe temperature sensors;
the second branch pipes are provided with inner machine expansion valves, and a liquid pipe temperature sensor is arranged between the inner machine expansion valves and the outlet end of the indoor machine;
an electric ball valve is arranged in the energy-saving module;
the control method comprises the following steps:
s1: the controller starts a single-opening floor heating mode and starts a compressor, the opening of the electric ball valve is completely opened to 2800 steps, and the opening of the expansion valve of the internal machine is completely opened to 480 steps;
s2: after the controller runs for 3min, the electric ball valve is closed, and the opening of the expansion valve of the internal machine is closed to 100 steps;
s3: when the opening of the electric ball valve is closed to 0 step, the controller respectively acquires the outdoor ring temperature T0, the first branch pipe temperature Teo and the second branch pipe temperature Tei through an outdoor temperature sensor, an air pipe temperature sensor and a liquid pipe temperature sensor;
s4: when T0 is more than or equal to 7 ℃, and the temperature Teo of the first branch pipe and the temperature Tei of the second branch pipe of the indoor unit are more than 4 ℃, and after lasting for 20 seconds, the controller closes the opening of the expansion valve of the indoor unit to 0 step;
when the temperature T0 is less than 7 ℃ below zero and the temperature Teo of the first branch pipe and the temperature Tei of the second branch pipe of the indoor unit are more than 3 ℃ and last for 20 seconds, the controller switches the opening of the expansion valve of the indoor unit to 0 step;
when T0 is < -5 ℃, and the temperature Teo of the first branch pipe and the temperature Tei of the second branch pipe of the indoor unit are more than 2 ℃, and after the time is 20 seconds, the controller switches the opening degree of the expansion valve of the indoor unit to 0 step.
Preferably, under any ambient temperature condition, after the compressor is operated for 5min, the opening of the internal expansion valves of all the indoor units are not controlled according to the first branch pipe temperature and the second branch pipe temperature, and the internal expansion valves are immediately closed to 0 steps.
Preferably, the indoor unit expansion valves of each indoor unit are controlled in accordance with the condition in S4 and do not affect each other.
According to the technical scheme, under the single-opening floor heating mode, the refrigerant is compressed by the compressor, enters the indoor side through the air pipe after passing through the four-way valve, flows through the indoor unit and the anhydrous floor heating, becomes medium-temperature high-pressure liquid after being condensed, becomes low-temperature low-pressure liquid after being throttled by the electronic expansion valve, enters the external heat exchanger for evaporation and heat absorption, becomes low-temperature low-pressure gas, and then returns to the compressor for repeated circulation through gas separation. In the process, the electric ball valve in the energy-saving module is firstly opened, and meanwhile, the expansion valve of the inner machine is opened, so that the refrigerant flows through the indoor machine, the electric ball valve is closed after a period of time, the expansion valve of the inner machine is closed to a certain opening degree, and when the closing condition is reached:
(1) when T0 is more than or equal to 7 ℃, and the temperature Teo of the first branch pipe and the temperature Tei of the second branch pipe of the indoor unit are more than 4 ℃, continuing for 20 seconds;
(2) when the temperature T0 is less than 7 ℃ below zero and the temperature Teo of the first branch pipe and the temperature Tei of the second branch pipe of the indoor unit are more than 3 ℃, the indoor unit lasts for 20 seconds;
(3) when T0 is < -5 ℃, and the temperature Teo of the first branch pipe and the temperature Tei of the second branch pipe of the indoor unit are more than 2 ℃, the indoor unit lasts for 20 seconds.
The system is considered that the risk of the liquid accumulation of the indoor unit is lower when the condition is met under the ring temperature of the (1), the (2) and the (3), at the moment, the indoor unit expansion valves of the indoor units meeting the condition are closed for 0 steps, and the indoor unit expansion valves of the other indoor units are continuously controlled according to the condition of the (1), the (2) and the (3) and are not mutually influenced.
By the above control, the following effects can be achieved:
1. the circulation quantity of the single-opening anhydrous floor heating refrigerant is increased, the anhydrous floor heating rate is accelerated, and the body feeling of a client is improved;
2. the refrigerant filling amount of the system is reduced, the cost is saved, and the body feeling of a customer during refrigeration is improved;
3. and the power consumption of the unit is reduced.
Drawings
Fig. 1 is a system diagram of a multi-split water-free floor heating system.
Fig. 2 is a refrigerant flow diagram of the multi-split water-free floor heating system in a single-on floor heating mode.
Description of the embodiments
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more, unless otherwise clearly defined.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
The multi-split water-free floor heating system comprises a controller, and a compressor 1, a four-way valve 2, a plurality of indoor units 3 and a condenser 4 which sequentially form a refrigerant main loop, wherein an air pipe 5 is connected to the four-way valve 2, the other end of the air pipe 5 is communicated with a main pipe of a first branch pipe 6, a plurality of first branch pipes 7 of the first branch pipe 6 are respectively communicated with inlet ends of the plurality of indoor units 3, an air pipe stop valve 8 is arranged on the air pipe 5, an energy-saving module 9 is communicated between the air pipe 5 and the first branch pipe 6, a first connecting pipe 10 is connected to the air pipe 5 between the air pipe stop valve 8 and the energy-saving module 9, a floor heating coil 11 is connected to the first connecting pipe 10, a second connecting pipe 12 is connected to the other end of the floor heating coil 11, the other end of the second connecting pipe 12 is communicated with a main pipe of the second branch pipe 13, the other end of the main pipe of the second branch pipe 13 is connected with a liquid pipe stop valve 19, and a plurality of second branch pipes 14 of the second branch pipe 13 are respectively communicated with outlet ends of the plurality of indoor units 3;
an outdoor temperature sensor 15 is arranged on the outer side of the condenser 4;
the first branch pipes 7 are provided with air pipe temperature sensors 16;
the plurality of second branch pipes 14 are respectively provided with an internal machine expansion valve 18, and a liquid pipe temperature sensor 17 is arranged between the internal machine expansion valves 18 and the outlet end of the indoor machine 3 on the plurality of second branch pipes 14;
an electric ball valve is arranged in the energy-saving module 9;
the system further comprises a first filter 100, a first electronic expansion valve 101, a first filter 102, a second electronic expansion valve 103, a third filter 104, a flash tank 105, an oil content 106, a fourth filter 107, a third electronic expansion valve 108 and a gas fraction 109.
As shown in fig. 1 and 2, a control method for improving heating effect of a multi-split water-free floor heating system comprises the following steps:
s1: the controller starts a single-opening floor heating mode and starts the compressor 1, the opening of the electric ball valve is completely opened to 2800 steps, and the opening of the internal machine expansion valve 18 is completely opened to 480 steps;
s2: after the compressor 1 runs for 3min, the controller closes the electric ball valve and closes the opening of the internal machine expansion valve 18 to 100 steps;
s3: when the opening of the electric ball valve is closed to 0 step, the controller respectively acquires the outdoor ring temperature T0, the first branch pipe 7 temperature Teo and the second branch pipe 14 temperature Tei through the outdoor temperature sensor 15, the air pipe temperature sensor 16 and the liquid pipe temperature sensor 17;
s4: when T0 is more than or equal to 7 ℃, and the temperature Teo of the first branch pipe 7 and the temperature Tei of the second branch pipe 14 of the indoor unit 3 are more than 4 ℃, and after lasting for 20 seconds, the controller switches the opening of the expansion valve 18 of the indoor unit to 0 step;
when the temperature T0 is less than 7 ℃ below zero and the temperature Teo of the first branch pipe 7 and the temperature Tei of the second branch pipe 14 of the indoor unit 3 are more than 3 ℃ and last for 20 seconds, the controller closes the opening of the expansion valve 18 of the indoor unit to 0 step;
when T0 < -5 ℃ and the temperature Teo of the first branch pipe 7 and the temperature Tei of the second branch pipe 14 of the indoor unit 3 are more than 2 ℃, and after 20 seconds, the controller switches the opening degree of the expansion valve 18 of the indoor unit to 0 step.
Further, under any ambient temperature condition, after the compressor 1 is operated for 5 minutes, the opening of the internal expansion valves 18 of all the indoor units 3 are no longer controlled according to the temperatures of the first branch pipe 7 and the second branch pipe 14, and the internal expansion valves 18 are immediately closed to 0 steps.
In this embodiment, in the single-open floor heating mode, after being compressed by the compressor, the refrigerant enters the indoor side through the air pipe after passing through the four-way valve, the refrigerant flows through the indoor unit and the anhydrous floor heating, the refrigerant passing through the anhydrous floor heating becomes medium-temperature high-pressure liquid after being condensed, the liquid enters the electronic expansion valve to become low-temperature low-pressure liquid after being throttled, and then the liquid enters the external heat exchanger to evaporate and absorb heat, becomes low-temperature low-pressure gas, and then returns to the compressor for repeated circulation through gas separation. In the process, the electric ball valve in the energy-saving module is firstly opened, and meanwhile, the expansion valve of the inner machine is opened, so that the refrigerant flows through the indoor machine, the electric ball valve is closed after a period of time, the expansion valve of the inner machine is closed to a certain opening degree, and when the closing condition is reached:
(1) when T0 is more than or equal to 7 ℃, and the temperature Teo of the first branch pipe and the temperature Tei of the second branch pipe of the indoor unit are more than 4 ℃, continuing for 20 seconds;
(2) when the temperature T0 is less than 7 ℃ below zero and the temperature Teo of the first branch pipe and the temperature Tei of the second branch pipe of the indoor unit are more than 3 ℃, the indoor unit lasts for 20 seconds;
(3) when T0 is < -5 ℃, and the temperature Teo of the first branch pipe and the temperature Tei of the second branch pipe of the indoor unit are more than 2 ℃, the indoor unit lasts for 20 seconds.
The system is considered that the risk of the liquid accumulation of the indoor unit is lower when the condition is met under the ring temperature of the (1), the (2) and the (3), at the moment, the indoor unit expansion valves of the indoor units meeting the condition are closed for 0 steps, and the indoor unit expansion valves of the other indoor units are continuously controlled according to the condition of the (1), the (2) and the (3) and are not mutually influenced.
By the above control, the following effects can be achieved:
1. the circulation quantity of the single-opening anhydrous floor heating refrigerant is increased, the anhydrous floor heating rate is accelerated, and the body feeling of a client is improved;
2. the refrigerant filling amount of the system is reduced, the cost is saved, and the body feeling of a customer during refrigeration is improved;
3. and the power consumption of the unit is reduced.
In the single-open floor heating mode, the fully-open electric ball valve is first opened to increase the amount of refrigerant involved in circulation and then closed.
Examples
When the outside ring temperature is 7 ℃, the client warms up and heats up singly without water, does not turn on the air conditioner, and the unit starts heating mode, and the electric ball valve in the energy-saving module is all opened to 2800 steps, and the internal machine expansion valve of all indoor machines is all opened to 480 steps, and when the compressor is operated to 3min, the electric ball valve is closed, and the internal machine expansion valve of all indoor machines is closed to 100 steps:
at this time, the temperature Teo of the first branch pipe of the indoor unit 301 and the temperature Tei of the second branch pipe are 5 ℃ for 20s, and the difference between the first branch pipe and the second branch pipe of the indoor unit No. 302 and No. 303 is 3 ℃, then the expansion valve of the indoor unit 301 is closed to 0 step. The indoor unit expansion valve of the indoor unit 302 and 303 continues to maintain 100 steps.
When the compressor is operated for 3min50s, the temperature Teo of the first branch pipe of the No. 302 indoor unit and the temperature Tei of the second branch pipe are 5 ℃ for 20s, but the temperature Teo of the first branch pipe of the No. 303 indoor unit and the temperature Tei of the second branch pipe are 3 ℃, at this time, the expansion valve of the No. 302 indoor unit is closed to 0 step, and the expansion valve of the No. 303 indoor unit is continuously maintained for 100 steps.
When the compressor is operated for 20s at 4min, the temperature Teo of the first branch pipe of the No. 303 indoor unit and the temperature Tei of the second branch pipe are 5 ℃, and after the operation lasts for 20s, the expansion valve of the No. 303 indoor unit is also closed to 0.
Examples
When the outside ring temperature is-12 ℃, the client warms up and heats up without water, the air conditioner is not started, the unit starts a heating mode, the electric ball valve in the energy-saving module is fully opened to 2800 steps, all the internal machine expansion valves are fully opened to 480 steps, the electric ball valve is closed after the compressor runs for 3min, all the internal machine expansion valves are closed to 100 steps, at the moment, the temperature Teo of the first branch pipe of each indoor machine-the temperature Tei of the second branch pipe of each indoor machine-the temperature Tei of each internal machine is less than 2 ℃, all the internal machine expansion valves are continuously maintained for 100 steps, but when the compressor is continuously operated for 5min, at the moment, all the internal machine expansion valves are directly closed to 0 step.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives, and variations may be made in the above embodiments by those skilled in the art without departing from the spirit and principles of the invention.
Claims (3)
1. A control method for improving heating effect of a multi-split water-free floor heating system is characterized by comprising the following steps of: the multi-split water-free floor heating system comprises a controller, and a compressor (1), a four-way valve (2), a plurality of indoor units (3) and a condenser (4) which sequentially form a refrigerant main loop, wherein a gas pipe (5) is connected to the four-way valve (2), the other end of the gas pipe (5) is communicated with a main pipe of a first branch pipe (6), a plurality of first branch pipes (7) of the first branch pipe (6) are respectively communicated with inlet ends of the plurality of indoor units (3), a gas pipe stop valve (8) is arranged on the gas pipe (5), an energy-saving module (9) is arranged between the gas pipe (5) and the first branch pipe (6), a first connecting pipe (10) is connected between the gas pipe stop valve (8) and the energy-saving module (9), a floor heating coil pipe (11) is connected to the first connecting pipe (10), a second connecting pipe (12) is connected to the other end of the floor heating coil pipe (11), the other end of the second connecting pipe (12) is communicated with the inlet end of the main pipe of the second branch pipe (13), a plurality of connecting pipes (19) of the other ends of the main pipes of the second branch pipes (13) are respectively communicated with the outlet ends of the plurality of indoor units (3);
an outdoor temperature sensor (15) is arranged at the outer side of the condenser (4);
the first branch pipes (7) are provided with air pipe temperature sensors (16);
the plurality of second branch pipes (14) are provided with inner machine expansion valves (18), and a liquid pipe temperature sensor (17) is arranged between the inner machine expansion valves (18) and the outlet end of the indoor machine (3) on the plurality of second branch pipes (14);
an electric ball valve is arranged in the energy-saving module (9);
the control method comprises the following steps:
s1: the controller starts a single-opening floor heating mode and starts a compressor (1), the opening of the electric ball valve is fully opened to 2800 steps, and the opening of the internal machine expansion valve (18) is fully opened to 480 steps;
s2: after the compressor (1) runs for 3min, the controller closes the electric ball valve and closes the opening of the internal machine expansion valve (18) to 100 steps;
s3: when the opening degree of the electric ball valve is closed to 0 step, the controller respectively acquires the outdoor ring temperature T0, the first branch pipe (7) temperature Teo and the second branch pipe (14) temperature Tei through an outdoor temperature sensor (15), an air pipe temperature sensor (16) and a liquid pipe temperature sensor (17);
s4: when T0 is more than or equal to 7 ℃, and the temperature Teo of the first branch pipe (7) and the temperature Tei of the second branch pipe (14) of the indoor unit (3) are more than 4 ℃, and after the time is 20 seconds, the controller closes the opening of the expansion valve (18) of the indoor unit to 0 step;
when the temperature T0 is less than 7 ℃ below zero and the temperature Teo of the first branch pipe (7) and the temperature Tei of the second branch pipe (14) of the indoor unit (3) are more than 3 ℃ and last for 20 seconds, the controller switches the opening of the expansion valve (18) of the indoor unit to 0 step;
when T0 is < -5 ℃, and the temperature Teo of the first branch pipe (7) and the temperature Tei of the second branch pipe (14) of the indoor unit (3) are more than 2 ℃, and after the time of 20 seconds, the controller switches the opening of the expansion valve (18) of the indoor unit to 0 step.
2. The control method for improving heating effect of the multi-split water-free floor heating system according to claim 1, wherein the control method is characterized by comprising the following steps of: under any ambient temperature condition, after the compressor (1) is operated for 5min, the opening of the internal expansion valves (18) of all the indoor units (3) is not controlled according to the temperature of the first branch pipe (7) and the temperature of the second branch pipe (14), and the internal expansion valves (18) are immediately closed to 0 step.
3. The control method for improving heating effect of the multi-split water-free floor heating system according to claim 1, wherein the control method is characterized by comprising the following steps of: the internal expansion valve (18) of each indoor unit (3) is controlled according to the condition in S4 and does not affect each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311640803.9A CN117739399A (en) | 2023-11-30 | 2023-11-30 | Control method for improving heating effect of multi-split water-free floor heating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311640803.9A CN117739399A (en) | 2023-11-30 | 2023-11-30 | Control method for improving heating effect of multi-split water-free floor heating system |
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| Publication Number | Publication Date |
|---|---|
| CN117739399A true CN117739399A (en) | 2024-03-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202311640803.9A Pending CN117739399A (en) | 2023-11-30 | 2023-11-30 | Control method for improving heating effect of multi-split water-free floor heating system |
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- 2023-11-30 CN CN202311640803.9A patent/CN117739399A/en active Pending
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