CN113566463A

CN113566463A - Air source heat pump device, control method and storage medium

Info

Publication number: CN113566463A
Application number: CN202111015690.4A
Authority: CN
Inventors: 马超; 钟文朝; 张登科; 陶骙
Original assignee: GD Midea Air Conditioning Equipment Co Ltd; Midea Group Wuhan HVAC Equipment Co Ltd
Current assignee: GD Midea Air Conditioning Equipment Co Ltd; Midea Group Wuhan HVAC Equipment Co Ltd
Priority date: 2021-08-31
Filing date: 2021-08-31
Publication date: 2021-10-29

Abstract

The invention discloses air source heat pump equipment, a control method and a storage medium, and relates to the technical field of heat pumps; the air source heat pump equipment comprises a refrigerant circulation loop, a water outlet flow path, a water inlet flow path, a bypass water flow path and a control device, wherein the refrigerant circulation loop comprises a compressor, a water side heat exchanger and a refrigerant radiating pipe; the bypass water flow path is arranged between the water outlet flow path and the water inlet flow path and comprises a water flow control valve, and the water flow control valve is used for adjusting the water flow of the bypass water flow path; and the control device is used for acquiring a target temperature, controlling the water flow control valve according to the target temperature and adjusting the temperature of the refrigerant radiating pipe by using hot water in the water outlet flow path, wherein the target temperature is used for representing the temperature of the refrigerant radiating pipe. The control method is applied to the air source heat pump equipment, and the storage medium stores the corresponding instruction of the control method.

Description

Air source heat pump device, control method and storage medium

Technical Field

The invention belongs to the technical field of heat pumps, and particularly relates to an air source heat pump device, a control method and a storage medium.

Background

The air source heat pump equipment is an energy-saving device which can make heat flow from low-level heat source air to high-level heat source by utilizing high-level energy, the current air source heat pump equipment adopts air-cooled variable-frequency electric control, and the trend is to utilize refrigerant to carry out variable-frequency electric control heat dissipation. For the air source heat pump equipment in the heating mode, in the heating process, a high-temperature and high-pressure gaseous refrigerant output by a compressor sequentially passes through a water side heat exchanger to exchange heat with water, a refrigerant radiating pipe to radiate heat, an electronic expansion valve to reduce pressure, and an evaporator to absorb heat and return to the compressor. If the return water temperature of water side heat exchanger is crossed lowly, lead to the refrigerant temperature of refrigerant cooling tube to cross lowly easily to cause the phenomenon of condensation to take place for positions such as refrigerant cooling tube or near the refrigerant cooling tube frequency conversion module easily.

Disclosure of Invention

The invention mainly aims to provide air source heat pump equipment, a control method and a storage medium, which can effectively reduce the probability of condensation.

In a first aspect, an embodiment of the present invention provides an air source heat pump apparatus, including a refrigerant circulation loop, a water outlet flow path, and a water inlet flow path, where the refrigerant circulation loop includes a compressor, a water side heat exchanger, and a refrigerant radiating pipe, the water outlet flow path is connected to a water outlet of the water side heat exchanger, and the water inlet flow path is connected to a water inlet of the water side heat exchanger, and the air source heat pump apparatus further includes:

a bypass water flow path provided between the water outlet flow path and the water inlet flow path, the bypass water flow path including a water flow control valve for adjusting a water flow rate of the bypass water flow path;

the control device is used for obtaining a target temperature, controlling the water flow control valve according to the target temperature, and adjusting the temperature of the cooling medium radiating pipe by using hot water in the water outlet flow path, wherein the target temperature is used for representing the temperature of the cooling medium radiating pipe.

According to the embodiment of the first aspect of the invention, at least the following advantages are achieved: after the hot water in the water outlet flow path is mixed with the water inlet flow path, the temperature of the water in the water inlet flow path can be increased, so that when the water in the water inlet flow path exchanges heat with the refrigerant in the water side heat exchanger, the heat of the refrigerant transferred to the water can be reduced, the heat loss of the refrigerant can be reduced, the target temperature of the refrigerant radiating pipe can be increased, and the risk of condensation of the refrigerant radiating pipe and the electrical equipment of the accessory can be reduced.

According to some embodiments of the first aspect of the present invention, the water flow control valve is a bypass solenoid valve, and the control device is specifically configured to:

and responding to the target temperature being less than the ambient temperature, controlling the bypass electromagnetic valve to be conducted, and adjusting the temperature of the refrigerant radiating pipe by using the hot water in the water outlet flow path.

According to some embodiments of the first aspect of the present invention, after the control device controls the bypass solenoid valve to conduct, the control device is further specifically configured to:

closing the bypass solenoid valve in response to the target temperature being greater than a first temperature threshold, wherein the first temperature threshold is greater than a dew condensation temperature.

According to some embodiments of the first aspect of the present invention, the water flow control valve is a mixing valve, and the control device is specifically configured to:

in response to the target temperature being less than the ambient temperature, controlling the mixing valve to increase the water flow of the bypass water flow path until the target temperature is greater than a second temperature threshold, wherein the second temperature threshold is greater than a condensation temperature.

According to some embodiments of the first aspect of the present invention, after the control device controls the mixing valve to increase the water flow of the bypass water flow path, the control device is further specifically configured to:

in response to the target temperature being greater than a third temperature threshold, controlling the mixing valve to reduce the water flow of the bypass water flow path; wherein the third temperature threshold is greater than the second temperature threshold.

According to some embodiments of the first aspect of the present invention, the control device is further specifically configured to:

and controlling the compressor to stop running for a preset time length in response to the time that the target temperature is less than the ambient temperature exceeding a first time threshold.

According to some embodiments of the first aspect of the present invention, after the compressor stops operating for the preset time period, the control device is specifically further configured to:

and controlling the compressor to start running in response to the time that the target temperature is greater than or equal to the fourth temperature threshold value and exceeds the second time threshold value.

In a second aspect, an embodiment of the present invention further provides a control method of an air source heat pump apparatus, where the air source heat pump apparatus includes a refrigerant circulation loop, a water outlet flow path, and a water inlet flow path, the refrigerant circulation loop includes a water-side heat exchanger and a refrigerant heat dissipation tube, the water outlet flow path is connected to a water outlet of the water-side heat exchanger, the water inlet flow path is connected to a water inlet of the water-side heat exchanger, the air source heat pump apparatus further includes a bypass water flow path, the bypass water flow path is disposed between the water outlet flow path and the water inlet flow path, and the bypass water flow path includes a water flow control valve;

the control method comprises the following steps:

acquiring a target temperature, wherein the target temperature is used for representing the temperature of the refrigerant radiating pipe;

and controlling the water flow control valve according to the target temperature, and adjusting the temperature of the refrigerant radiating pipe by using the hot water in the water outlet flow path.

According to some embodiments of the second aspect of the present invention, the controlling the water flow valve as a bypass solenoid valve, the controlling the water flow valve according to the target temperature, and the adjusting the temperature of the coolant radiating pipe by using the hot water in the outlet flow path, includes:

and when the target temperature is lower than the ambient temperature, controlling the bypass electromagnetic valve to be conducted, and adjusting the temperature of the refrigerant radiating pipe by using the hot water in the water outlet flow path.

According to some embodiments of the second aspect of the invention, after the bypass solenoid valve is turned on, the control method further comprises:

and when the target temperature is higher than a first temperature threshold value, closing the bypass electromagnetic valve.

According to some embodiments of the second aspect of the present invention, the controlling the water flow valve according to the target temperature to adjust the temperature of the cooling medium radiating pipe by using the hot water in the outlet flow path includes:

and when the target temperature is lower than the ambient temperature, controlling the water mixing valve to increase the water flow of the bypass water flow path until the target temperature is higher than a second temperature threshold, wherein the second temperature threshold is higher than the condensation temperature.

According to some embodiments of the second aspect of the present invention, after the controlling the mixing valve to increase the water flow of the bypass water flow path, the controlling method further comprises:

and when the target temperature is greater than a third temperature threshold, controlling the water mixing valve to reduce the water flow of the bypass water flow path, wherein the third temperature threshold is greater than the second temperature threshold.

According to some embodiments of the second aspect of the invention, the control method further comprises:

and when the time that the target temperature is lower than the environmental temperature exceeds a first time threshold, controlling the compressor to stop running for a preset time.

According to some embodiments of the second aspect of the present invention, after the compressor stops operating for the preset time period, the control method further comprises:

and when the time that the target temperature is greater than or equal to the fourth temperature threshold exceeds a second time threshold, controlling the compressor to start to operate.

In a third aspect, an embodiment of the present invention further provides an air source heat pump apparatus, including: a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the control method of the air source heat pump apparatus according to any one of the second aspect when executing the computer program.

In a fourth aspect, the present invention further provides a computer-readable storage medium, where computer-executable instructions are stored, and the computer-executable instructions are used to make a computer execute the control method of the air source heat pump device according to any one of the second aspects.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Drawings

Fig. 1 is a schematic structural diagram of an air source heat pump apparatus according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of an air source heat pump device according to another embodiment of the present invention;

fig. 3 is a schematic structural diagram of an air source heat pump device according to another embodiment of the present invention;

fig. 4 is a schematic structural diagram of an air source heat pump device according to another embodiment of the present invention;

fig. 5 is a schematic structural diagram of an air source heat pump device according to another embodiment of the present invention;

fig. 6 is a schematic structural diagram of an air source heat pump device according to another embodiment of the present invention;

fig. 7 is a schematic structural diagram of an air source heat pump device according to another embodiment of the present invention;

fig. 8 is a schematic structural diagram of an air source heat pump device according to another embodiment of the present invention;

fig. 9 is a schematic structural diagram of an air source heat pump apparatus according to another embodiment of the present invention;

fig. 10 is a schematic flow chart illustrating refrigerant bypass conduction of a control method of an air source heat pump apparatus according to an embodiment of the present invention;

fig. 11 is another schematic control flow diagram of a control method of an air source heat pump device according to an embodiment of the present invention;

fig. 12 is a schematic structural diagram of an air source heat pump apparatus according to an embodiment of the present invention.

Reference numerals:

the air conditioner comprises a compressor 110, a water side heat exchanger 120, a water inlet 121, a water outlet 122, a refrigerant radiating pipe 130, an electronic expansion valve 140, an evaporator 150, a throttling device 160, a gas-liquid separating device 170, a four-way valve 180, a temperature detecting device 210, a bypass water flow path 220, a water flow control valve 221, a water inlet flow path 230, a water outlet flow path 240, a water pump 250, an auxiliary heater 260, a processor 300 and a memory 400.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features.

In the description of the present invention, unless otherwise expressly limited, the terms set, mounted, connected, and the like are to be construed broadly, e.g., as being fixed or removably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above-mentioned words in the present invention can be reasonably determined by those skilled in the art in combination with the detailed contents of the technical solutions.

Air source energy is an important component of new and renewable energy sources. The air source has huge energy, and is inexhaustible energy. The utilization of air-source energy is not like the conventional energy sources in the earth, and can be completely exhausted after hundreds of years. The air source can be widely distributed and is convenient to obtain. Moreover, the air source does not need to be mined and transported, is safe and sanitary to use, has no pollution to the environment, and is a creditable clean energy source. The air source heat pump is an energy-saving device which utilizes high-level energy to enable heat to flow from low-level heat source air to a high-level heat source, and the working principle of the air source heat pump is that low-level heat energy which cannot be directly utilized (namely heat of air source energy, such as heat contained in air, soil and water) can be converted into high-level heat energy which can be utilized according to the reverse Carnot cycle principle, so that the aim of saving part of high-level energy (such as coal, gas, oil, electric energy and the like) is fulfilled. Therefore, air-source heat pump apparatuses are widely used.

Based on the above, the embodiment of the invention provides an air source heat pump device, a control method and a storage medium. The following disclosure provides many different embodiments or examples to illustrate different aspects of the invention.

Referring to fig. 1 to 9, the present invention provides different embodiments of an air source heat pump apparatus, wherein the air source heat pump apparatus may be an air source heat pump apparatus having only a heating mode, or an air source heat pump apparatus having both a cooling mode and a heating mode.

Referring to fig. 1 to 9, the air source heat pump apparatus includes a bypass water flow path 220, a refrigerant circulation loop, a control device, a water inlet flow path 230, and a water outlet flow path 240, wherein the refrigerant circulation loop includes a compressor 110, a water-side heat exchanger 120, and a refrigerant heat dissipation tube 130, which are sequentially connected, a water outlet 122 of the water-side heat exchanger 120 is connected to the water outlet flow path 240, and a water inlet 121 of the water-side heat exchanger 120 is connected to the water inlet flow path 230; the bypass flow path 220 is disposed between the outlet flow path 240 and the inlet flow path 230, and the bypass flow path 220 includes a flow control valve 221; the control device is used for receiving the target temperature and controlling the water flow control valve 221 according to the target temperature, so as to adjust the temperature of the refrigerant heat dissipation pipe 130 by using the hot water in the water outlet flow path 240.

It should be noted that the target temperature is used to represent the temperature of the refrigerant heat dissipation pipe 130.

The target temperature is detected by the temperature detection device 210 and then transmitted to the control device. The target temperature may be a pipe temperature detected by the cooling medium radiating pipe 130 or a water inlet temperature detected by the water inlet flow path 230. For example, with reference to the air source heat pump apparatus as in the embodiments of fig. 1 to 4; the temperature detection device 210 is disposed on the refrigerant heat dissipation tube 130 and configured to detect a tube temperature of the refrigerant heat dissipation tube 130; for another example, referring to the air-source heat pump apparatus shown in fig. 5 to 9, the temperature detection device 210 is provided in the water inlet flow path 230, and detects the temperature of the inlet water in the water inlet flow path 230. At this time, the temperature of the water in the water side heat exchanger 120 is increased, thereby reducing the heat provided by the refrigerant and further increasing the temperature of the refrigerant entering the refrigerant heat dissipation tube 130.

It should be noted that the refrigerant circulation loop further includes an electronic expansion valve 140 and an evaporator 150, the electronic expansion valve 140 is disposed between the refrigerant heat dissipation pipe 130 and the evaporator 150, and the electronic expansion valve 140 is used for converting a high-pressure refrigerant into a low-pressure refrigerant; the evaporator 150 is disposed between the compressor 110 and the refrigerant heat dissipation pipe 130, and processes the refrigerant through the compressor 110, the water side heat exchanger 120, the refrigerant heat dissipation pipe 130, the electronic expansion valve 140, and the evaporator 150 to complete a heating process of the air source heat pump device. The evaporator 150 may be a fin heat exchanger or a plate heat exchanger.

When the heating mode is activated, with reference to the air-source heat pump apparatus shown in fig. 1 to 9; the compressor 110 delivers the high-temperature and high-pressure gaseous refrigerant to the water side heat exchanger 120 to complete heat exchange, and outputs a low-temperature and high-pressure liquid refrigerant, which is changed into a low-pressure liquid refrigerant by the electronic expansion valve 140, and enters the compressor 110 after being gasified and absorbing heat by the evaporator 150 to complete a heating process. In the heating process, the control device receives the target temperature sent by the temperature detection device 210 in real time, and controls the water flow control valve 221 according to the difference between the target temperature and the preset temperature (such as the ambient temperature), so as to conduct the bypass water flow path 220, thereby increasing the temperature of the water in the water side heat exchanger 120, therefore, when the water in the water side heat exchanger 120 exchanges heat with the refrigerant, the heat of the refrigerant transferred to the water can be reduced, the heat loss of the refrigerant can be reduced, thereby increasing the target temperature of the refrigerant heat dissipation pipe 130, and reducing the risk of condensation of the refrigerant heat dissipation pipe 130 and the electrical equipment (such as frequency conversion electric control and the like) of the accessory thereof.

It can be understood that, referring to the embodiment of fig. 1 to 4, the water flow control valve 221 may be a bypass solenoid valve, and the control device opens the bypass solenoid valve to conduct the bypass water flow path 220 when detecting that the target temperature is lower than the ambient temperature, and reduces the heat transferred to the water by the refrigerant by using the hot water in the water outlet flow path 240, thereby adjusting the pipe temperature of the refrigerant heat dissipation pipe 130.

It can be understood that, referring to the embodiment of fig. 1 to 4, the water flow control valve 221 is a bypass solenoid valve and the bypass solenoid valve is in a conducting state, and when the control device detects that the target temperature is greater than the first temperature threshold, the control device closes the bypass solenoid valve.

It should be noted that the first temperature threshold is greater than the condensation temperature. The first temperature threshold may be set to a minimum value between the first temperature and the second temperature, i.e. the first temperature threshold is equal to the second temperature when the first temperature is greater than the second temperature; when the first temperature is lower than or equal to the second temperature, the first temperature threshold value is equal to the first temperature. Wherein the first temperature is the highest temperature that the equipment can bear, and the second temperature is the temperature set based on the ambient temperature; and the second temperature is greater than ambient temperature.

It can be understood that, referring to the embodiment of fig. 1 to 5, the water flow control valve 221 may be a water mixing valve, and the control device detects that the target temperature is lower than the ambient temperature, controls the water mixing valve to increase the water flow of the bypass water flow path 220, and stops increasing the water flow of the bypass water flow path 220 when the target temperature is higher than the second temperature threshold.

It should be noted that the second temperature threshold is greater than the condensation temperature.

It should be noted that the mixing valve is provided with two water inlets respectively connected to the water outlet flow path 240 and the water inlet flow path 230, and when the target temperature is between the ambient temperature and the second temperature threshold, the water inlet connected to the water outlet flow path 240 is powered on, and at this time, the water flow rate of the water inlet gradually increases, and at the same time, the water flow rate of the water inlet connected to the water inlet flow path 230 gradually decreases. The second temperature threshold may be set to a minimum value between the two temperature thresholds. One of the temperature thresholds is set based on the ambient temperature and the other temperature threshold is set based on the highest temperature that the electrical device can withstand.

It can be understood that, referring to the embodiment of fig. 1 to 5, the water flow control valve 221 is a water mixing valve and when the water flow control valve 221 increases the water flow of the bypass water flow path 220, the control device detects that the target temperature is greater than the third temperature threshold, and decreases the water flow of the bypass water flow path 220.

It should be noted that the third temperature threshold is greater than the second temperature threshold. The water flow rate of the bypass water flow path 220 is controlled by a mixing valve.

It should be noted that, when the target temperature is too high, the operation state of the electrical equipment near the refrigerant heat dissipation pipe 130 is affected, so that the water inlet 121 connected to the water inlet flow path 230 needs to be powered on to gradually increase the input of the flow rate of the cold water, and at the same time, the water inlet 121 connected to the water outlet flow path 240 needs to be disconnected to reduce the input water flow rate with the increase of the flow rate of the cold water, so as to achieve the purpose of protecting the electrical equipment.

It can be understood that, referring to the embodiment of fig. 1 to 9, when the target temperature is detected to be less than the ambient temperature and the duration exceeds the first time threshold, the operation of the compressor 110 is stopped and is continuously stopped for a preset time period.

It should be noted that the preset time period may be set to 3min or more. For example, the preset time period may be set to 3min, and in other embodiments, the preset time period may be set to 5 min.

It should be noted that, when the detection device detects that the ambient temperature is higher than the target temperature and exceeds the first time threshold, it indicates that the temperature of the refrigerant output by the water side heat exchanger 120 is low, and the heat provided in the water flow path is not enough to raise the temperature of the refrigerant radiating pipe 130 to reduce the condensation probability. Therefore, it is necessary to stop the compressor 110 to ensure that the water side heat exchanger 120 does not output the refrigerant with a low temperature to the refrigerant heat dissipation pipe 130, and to increase the temperature of the water in the water side heat exchanger 120 by repeatedly returning the refrigerant through the bypass water flow path 220.

It can be understood that, when the compressor 110 is stopped and the operation stop time is a preset time, the control device detects that the target temperature is greater than or equal to the fourth temperature threshold and the duration time exceeds the second time threshold, and starts the compressor 110.

It should be noted that maintaining the bypass water flow path 220 in the on state for the preset time period can raise the temperature of the water in the water side heat exchanger 120 and reduce the number of operations on the bypass water flow path 220.

It should be noted that the fourth temperature threshold may be a temperature greater than or equal to the ambient temperature. The second time threshold may be set manually as required, for example 1min, for example 2min again.

In the air-source heat pump apparatus of the present embodiment, the type of the water-side heat exchanger 120 is preferably a water-refrigerant heat exchanger, and the arrangement of the water outlet flow path 240 and the water inlet flow path 230 is not limited.

For example, referring to the embodiment shown in fig. 1, the water pump 250 is disposed on the water inlet flow path 230, the water flow control valve 221 and the water inlet flow path 230 are respectively connected to both ends of the water pump 250, the water outlet flow path 240 and the water flow control valve 221 are respectively connected to both ends of the auxiliary heater 260, and the water flow control valve 221 is a bypass valve. At this time, the hot water is output from the water outlet of the water side heat exchanger 120, passes through the auxiliary heater 260, and then flows out of the water outlet flow path 240. When the bypass water flow path 220 is turned on, part of the hot water passes through the auxiliary heater 260, enters the bypass water flow path 220, passes through the water pump 250 in the inlet water flow path 230, and enters the water-side heat exchanger 120.

For another example, referring to the embodiment shown in fig. 2, one end of the water flow control valve 221 is connected to the water inlet flow path 230; one end of the water outlet flow path 240 is connected with the auxiliary heater 260 and the water pump 250 in sequence and then is connected with the other end of the water flow control valve 221; the water flow control valve 221 may be a bypass valve.

At this time, when the bypass valve is turned on, a part of the hot water passes through the auxiliary heater 260 and the water pump 250, and flows out through the outlet flow path 240. Another part of the hot water is introduced from the water pump 250 into the water inlet flow path 230 through the water flow control valve 221, and then flows back to the water inlet 121 of the water side heat exchanger 120.

For another example, referring to the embodiment shown in fig. 3, one end of the auxiliary heater 260 is connected to the water flow control valve 221, and the other end of the auxiliary heater 260 is connected to the water outlet 122 through the water pump 250; the water flow control valve 221 is directly connected with the water inlet flow path 230; wherein the water flow control valve 221 is a bypass valve.

When the bypass valve is opened, a part of the hot water is sequentially output from the water outlet flow path through the water pump 250 and the auxiliary heater 260. Another part of the hot water is transferred to the bypass water flow path 220 and enters the inlet water flow path 230 after passing through the water pump 250 and the auxiliary heater 260. The hot water entering the water inlet flow path 230 flows back to the water inlet 121.

For another example, referring to the embodiment shown in fig. 4, one end of the water pump 250 is connected to the water outlet flow path 240, and the other end of the water pump 250 is connected to one end of the water flow control valve 221; the water inlet flow path 230 is directly connected with the other end of the water flow control valve 221 through a pipeline; wherein the water flow control valve 221 is a bypass valve.

When the bypass valve is opened, part of the hot water flows out to the outlet flow path 240 through the water pump 250. Another portion of the hot water flows through the water pump 250 to the bypass flow path 220 to the inlet flow path 230, and the another portion of the hot water flows through the inlet flow path 230 to the inlet 121.

When the water flow control valve 221 is a bypass valve, two ends of the water pump 250 are connected to the water inlet flow path 230 and the water outlet of the water flow control valve 221, respectively, and at this time, the water inlet of the water flow control valve 221 is connected to the water outlet flow path 240.

For another example, referring to the embodiment shown in fig. 5, one end of the water pump 250 is connected to the water inlet, the other end of the water pump 250 is connected to the water flow control valve 221, and the auxiliary heater 260 is disposed between the outlet flow path 240 and the water flow control valve 221, wherein the water flow control valve 221 is a mixing valve.

For another example, referring to the embodiment shown in fig. 6, one end of the auxiliary heater 260 is connected to the water outlet 122 of the water-side heat exchanger 120, the other end of the auxiliary heater 260 is connected to one end of the water pump 250, and the other end of the water pump 250 is connected to the water outlet flow path and communicates with the bypass water flow path 220. One end of the water flow control valve 221 is connected to the water inlet flow path 230, and the other end of the water flow control valve 221 is connected to the other end of the water pump 250; wherein the water flow control valve 221 is a water mixing valve.

For another example, referring to the embodiment shown in fig. 7, the water outlet of the water-side heat exchanger 120 is sequentially connected to a water pump 250 and an auxiliary heater 260, and the auxiliary heater 260 is connected to the water outlet flow path 240 and communicates with the water flow control valve 221; the inlet flow path 230 is connected to the direct water flow control valve 221 through a pipe; wherein the water flow control valve 221 is a water mixing valve. At this time, when the bypass water flow path 220 is turned on, part of the hot water is output through the outlet of the water side heat exchanger 120, passes through the water pump 250 and the auxiliary heater 260, and is output through the water outlet flow path, and part of the hot water is mixed with the cold water in the water inlet flow path 230 through the bypass water flow path 220 and enters the water inlet 121 of the water side heat exchanger 120.

For another example, referring to the embodiment shown in fig. 8, a water pump 250 is connected between the water flow control valve 221 and the water outlet flow path 240; the water inlet flow path 230 is connected to a water flow control valve 221 through a pipe; wherein the water flow control valve 221 is a water mixing valve.

For another example, referring to the embodiment shown in fig. 9, a water pump 250 is connected between the water inlet flow path 230 and the water flow control valve 221; the water outlet flow path 240 is connected to the water flow control valve 221 via a pipe; wherein the water flow control valve 221 is a water mixing valve.

It is noted that, with reference to the embodiment of fig. 1-9, the water pump 250 is used to increase the flow of water through the water flow control valve 221. The auxiliary heater 260 is used to assist in raising the outlet temperature of the outlet flow path 240. The operation state of the supplementary heater 260 may be controlled by a control device.

In the embodiment of fig. 1 to 9, the water-side heat exchanger 120 is a water-refrigerant heat exchanger.

Referring to the embodiment shown in fig. 1 to 9, the refrigerant circulation circuit further includes a throttle device 160, a gas-liquid separator 170, and a four-way valve 180. Four ports of the four-way valve 180 are connected to an inlet of the gas-liquid separating device 170, an outlet of the compressor 110 and the evaporator 150, and a refrigerant inlet of the water-side heat exchanger 120, respectively. The compressor 110 is connected to an outlet of the gas-liquid separation device 170. In the heating mode, the compressor 110 outputs a high-temperature and high-pressure gaseous refrigerant through the four-way valve 180, the gaseous refrigerant is conveyed to the water-side heat exchanger 120 through a pipeline, meanwhile, cold water is continuously input into the water inlet 121 of the water-side heat exchanger 120 to exchange heat with the high-temperature and high-pressure refrigerant, at this time, hot water is output from the water outlet 122 to the water outlet flow path 240, and meanwhile, the refrigerant is output from the water-side heat exchanger 120 and then becomes a low-temperature liquid refrigerant. When the target temperature is lower than the environmental temperature, the water flow control valve 221 is controlled to conduct the bypass water flow path 220, and at this time, the hot water in the water outlet flow path 240 enters the water inlet flow path 230 through the water flow control valve 221, so as to raise the temperature of the water in the water side heat exchanger 120, reduce the heat of the refrigerant transferred to the water, and reduce the risk of condensation on the refrigerant heat dissipation pipe 130 and the electrical equipment attached thereto.

Specifically, referring to the embodiment of fig. 1, after the high-temperature and high-pressure gaseous refrigerant output by the compressor 110 enters the water-side heat exchanger 120, the control device receives that the pipe temperature of the refrigerant heat dissipation pipe 130 sent by the temperature detection device 210 is less than the ambient temperature, and controls the bypass valve to be turned on, at this time, the hot water in the water-side heat exchanger 120 is output from the water outlet 122, passes through the auxiliary heater 260, and then flows back to the water inlet flow path 230 through the bypass water flow path 220, and enters from the water inlet 121. At this time, the heat loss of the refrigerant in the water side heat exchanger 120 is reduced, and at this time, the refrigerant is output to the throttling device 160, the refrigerant heat dissipation pipe 130, the electronic expansion valve 140, and the evaporator 150 through the water side heat exchanger to complete primary heating. When the refrigerant is circulated for multiple times, the control device detects that the temperature of the pipeline of the refrigerant radiating pipe 130 is greater than the first temperature threshold value, the bypass water flow path 220 is disconnected, at this time, the hot water does not flow back in the water side heat exchanger 120 any more, the water temperature in the water side heat exchanger 120 is reduced, and meanwhile, the heat loss of the refrigerant in the water side heat exchanger 120 is increased, so that the temperature of the output refrigerant is lower, and correspondingly, the temperature of the pipeline of the refrigerant radiating pipe 130 is reduced.

Specifically, referring to the embodiment of fig. 5, when the control device receives the pipe temperature of the temperature detection device 210 and the pipe temperature is greater than the ambient temperature, the port of the mixing valve 221 connected to the water outlet flow path 240 is powered on, and at this time, the flow rate of the water allowed to pass through by the bypass water flow path 220 is gradually increased, and the flow rate of the cold water allowed to pass through by the water inlet flow path 230 is gradually decreased. At this time, the hot water output from the water side heat exchanger 120 passes through the auxiliary heater 260, enters the inlet flow path 230 through the bypass flow path 220, and is returned to the water side heat exchanger 120 by the water pump 250. At this time, the heat loss of the refrigerant is reduced, thereby increasing the pipe temperature of the refrigerant heat pipe 130. When the control device receives that the pipe temperature of the cooling medium heat dissipation pipe 130 is continuously lower than the ambient temperature and the duration time is longer than the preset 5min, the operation of the compressor 110 is stopped. After waiting for the preset time duration of 3min to elapse, re-acquiring the pipeline temperature of the refrigerant radiating pipe 130, and judging whether the pipeline temperature is greater than or equal to a fourth temperature threshold value and whether the duration time is checked for a second time threshold value (such as 4 min); when the duration exceeds a second time threshold, the compressor 110 is restarted. At this time, the compressor 110 heats again, and repeats the above steps to determine whether the temperature of the water in the water side heat exchanger 120 needs to be raised.

In addition, referring to fig. 10, a control method of the air source heat pump apparatus according to the embodiment of the present invention is further described. The control method is applied to the air-source heat pump apparatus shown previously. The control method comprises the following steps:

step S100 receives the target temperature transmitted by the temperature detection device 210.

It should be noted that the target temperature is used to represent the temperature of the coolant radiating pipe 130, for example, the target temperature is set as the pipe temperature of the coolant radiating pipe 130, and for example, the target temperature is set as the water flow temperature of the water inlet flow path, and at this time, whether condensation occurs in the pipe temperature of the coolant radiating pipe 130 can be indirectly determined through the water flow temperature.

It should be noted that, referring to the embodiments shown in fig. 1 to 4, the temperature detecting device 210 is disposed on the refrigerant heat dissipating pipe 130. Referring to the embodiment of fig. 5 to 9, the temperature detecting device 210 is disposed in the water inlet flow path 230 for detecting the temperature of the inlet water of the water inlet flow path 230. Whether the coolant generates the condensation phenomenon in the coolant heat dissipation pipe 130 is determined according to the target temperature.

Step S200, the water flow control valve 221 is controlled according to the temperature difference between the target temperature and the preset temperature to open the bypass water flow path, and the hot water in the water outlet flow path 240 flows back to the water inlet flow path 230 through the bypass water flow path 220, so as to adjust the temperature of the refrigerant heat dissipation tube 130.

It should be noted that the preset temperature may be an ambient temperature.

Therefore, when the temperature difference between the target temperature and the preset temperature is smaller than the temperature of the environment, for example, the target temperature is smaller than the temperature of the environment, the water flow control valve 221 is controlled to open the bypass water flow path 220, and at this time, the hot water in the outlet water flow path 240 is mixed into the inlet water flow path 230 through the bypass water flow path 220, so as to increase the temperature of the water in the inlet water flow path 230. When the water in the water inlet flow path 230 exchanges heat with the refrigerant in the water side heat exchanger 120, the heat of the refrigerant transferred to the water can be reduced, and the heat loss of the refrigerant can be reduced, so that the temperature of the refrigerant entering the refrigerant radiating pipe 130 can be increased, and the risk of condensation of electrical equipment such as the frequency conversion module arranged on the refrigerant radiating pipe 130 and accessories thereof can be reduced.

It can be understood that, referring to the embodiment of fig. 1 to 4, the water flow control valve 221 may be a bypass solenoid valve, and the process of controlling the water flow control valve in step S200 includes:

when the target temperature is lower than the ambient temperature, the bypass solenoid valve is turned on, and the hot water in the outlet flow path 240 flows back to increase the temperature of the water in the water side heat exchanger 120, so as to adjust the temperature of the pipeline of the refrigerant heat dissipation tube 130.

It can be understood that, referring to the embodiment of fig. 1 to 4, the water flow control valve 221 is a bypass solenoid valve, and the bypass solenoid valve is in a conducting state, the control method further includes: and when the target temperature is detected to be higher than the first temperature threshold value, the bypass electromagnetic valve is disconnected.

It can be understood that, referring to the embodiment of fig. 5 to 9, the water flow control valve 221 may be a water mixing valve, and the control process of the water flow control valve 221 in the step S200 includes:

when the target temperature is detected to be lower than the ambient temperature, the water flow of the bypass water flow path 220 is increased through the water mixing valve, and when the target temperature is higher than the second temperature threshold, the water flow of the bypass water flow path 220 is stopped being increased.

It should be noted that the second temperature threshold is greater than the condensation temperature. In some embodiments, the second temperature threshold is a minimum between the first temperature and the second temperature, e.g., when the first temperature is greater than the second temperature, the second temperature threshold is the second temperature; for another example, when the first temperature is lower than the second temperature, the second temperature threshold is the first temperature. The first temperature is set based on the ambient temperature and the second temperature is set based on the highest temperature that the electrical device can withstand.

Referring to the embodiment of fig. 5 to 9, the water inlet connected to the water outlet flow path 240 of the mixing valve is powered on, and the water inlet connected to the water inlet flow path 230 of the mixing valve is powered off, so that the water flow rate of the bypass water flow path 220 is increased, and at the same time, the flow rate of the cold water flowing through the water inlet flow path 230 is decreased. Specifically, referring to the embodiment of fig. 5, the auxiliary heater 260 is turned on, and after hot water is output from the water outlet 122 of the water side heat exchanger 120, the outlet flow path 240 is reheated by the auxiliary heater 260, and then, the hot water flows back to the inlet flow path through the bypass flow path 220. The water pump 250 is turned on to increase the speed of the water flow through the bypass water flow path 220, at this time, the amount of cold water is reduced relative to the input amount; thereby increasing the rate at which the temperature of the water side heat exchanger 120 increases. Thereby reducing heat loss of the refrigerant output from the compressor 110.

It can be understood that, referring to fig. 11, after controlling the mixing valve to increase the water flow of the bypass water flow path 220, the control method performs step S300, and when the target temperature is detected to be greater than the third temperature threshold, the water flow of the bypass water flow path 220 is decreased by the mixing valve.

It should be noted that the third temperature threshold is greater than the second temperature threshold.

Referring to the embodiment of fig. 5 to 9, the water inlet connected to the water outlet flow path 240 of the mixing valve is powered off, and at the same time, the water inlet connected to the water inlet flow path 230 of the mixing valve is powered on, so as to gradually increase the flow rate of cold water in the water inlet flow path 230, and thus gradually decrease the flow rate of water in the bypass flow path 220.

It can be understood that, referring to fig. 11, the control method further executes step S400, and when it is detected that the target temperature is lower than the ambient temperature and the duration exceeds the first time threshold, the compressor 110 is controlled to stop running and stop for a preset time.

It should be noted that, when the detection device detects that the ambient temperature is higher than the target temperature and the duration time exceeds the first time threshold, it indicates that the temperature of the refrigerant output by the water side heat exchanger 120 is low, and the heat provided in the water flow path is not enough to raise the pipe temperature of the refrigerant radiating pipe 130 to reduce the condensation probability. Therefore, it is necessary to stop the compressor 110 to ensure that the water side heat exchanger 120 does not output the refrigerant with a low temperature to the refrigerant heat dissipation pipe 130, and to increase the temperature of the water in the water side heat exchanger 120 by repeatedly returning the refrigerant through the bypass water flow path 220.

It can be understood that, referring to fig. 11, after the preset time period, the control method further performs step S500, and when the received target temperature is greater than or equal to the fourth temperature threshold and the duration exceeds the second time threshold, the compressor 110 is started to operate.

Embodiments of the present invention further provide a computer-readable storage medium, where the computer-readable storage medium stores computer-executable instructions, where the computer-executable instructions are executed by one or more control processors 300, for example, by one processor 300 in fig. 12, so that the one or more processors 300 can execute the control method of the air source heat pump system in the second aspect, for example, the processor 300 controls the water flow control valve 221 to conduct the bypass water flow path 220 in the heating mode through the control methods shown in steps S100 and S200, at this time, hot water output by the water output flow path 240 enters the water inlet flow path 230 through the bypass water flow path 220, so as to increase the temperature of water in the water-side heat exchanger 120, and when a high-temperature and high-pressure gaseous refrigerant output by the compressor 110 enters the water-side heat exchanger 120 for heat exchange, heat loss can be reduced, thereby increasing the target temperature of the coolant heat dissipation pipe 130 and reducing the probability of condensation.

In other embodiments, the processor 300 executes the control method shown in steps S100 to S500, and after controlling the water flow control valve 221 to turn on the bypass water flow path 220, the target temperature is obtained in real time, and the water flow control valve 221 is controlled to turn off the bypass water flow path 220 or stop the operation of the compressor 110, so as to ensure that the pipe temperature of the refrigerant heat dissipation pipe 130 is not too high or continuously too low.

In other embodiments, the processor 300 reduces the risk of condensation through the steps shown in steps S100, S200 and S200 when the water flow control valve 221 is set as a bypass valve or a water mixing valve, for example, when the water flow control valve 221 is set as a bypass valve, the processor 300 determines that the target temperature is lower than the ambient temperature, turns on the bypass valve, and adjusts the pipe temperature of the cooling medium heat dissipation pipe 130 through the bypass water flow path 220; for another example, when the water flow control valve 221 is set as a water mixing valve, the processor 300 determines that the target temperature is lower than the ambient temperature, increases the water flow rate flowing through the bypass water flow path 220, and further raises the temperature in the water side heat exchanger 120 to ensure that the outputted refrigerant can adjust the pipe temperature of the refrigerant heat dissipation pipe 130.

The above-described embodiments of the apparatus are merely illustrative, wherein the units illustrated as separate components may or may not be physically separate, i.e. may be located in one place, or may also be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.

Referring to fig. 12, an embodiment of the present invention further provides an air source heat pump apparatus, including a processor 300, a memory 400, and a computer program, which is executable on the processor 300 and stored on the memory 400. In some embodiments, the processor 300 executes the control methods shown in steps S100 and S200, and in the heating mode, the bypass water flow path 220 is conducted through the water flow control valve 221, and the hot water output by the water output flow path 240 enters the water inlet flow path 230 through the bypass water flow path 220, so as to increase the temperature of the water in the water-side heat exchanger 120.

In other embodiments, the processor 300 executes the control methods shown in steps S100 to S500, and after controlling the water flow control valve 221 to turn on the bypass water flow path 220, the target temperature is detected in real time, and the water flow control valve 221 is controlled to turn off the bypass water flow path 220 or stop the operation of the compressor 110, so as to ensure that the pipe temperature of the refrigerant heat dissipation pipe 130 is not too high or continuously too low.

It will be appreciated by those skilled in the art that the arrangement shown in fig. 12 does not constitute a limitation of the air-to-air source heat pump apparatus and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.

One of ordinary skill in the art will appreciate that all or some of the steps, systems, and methods disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as is well known to those of ordinary skill in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, Digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can accessed by a computer. In addition, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media as known to those skilled in the art.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "specifically," or "some examples" or the like are intended to mean 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 invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. Air source heat pump equipment, including refrigerant circulation circuit, play water flow path and inflow flow path, refrigerant circulation circuit includes compressor, water side heat exchanger, refrigerant cooling tube, it connects to go out the water flow path the delivery port of water side heat exchanger, it connects to advance the water flow path the water inlet of water side heat exchanger, its characterized in that, air source heat pump equipment still includes:

2. The air-source heat pump apparatus of claim 1, wherein the water flow control valve is a bypass solenoid valve, and the control device is specifically configured to:

3. The air-source heat pump apparatus according to claim 2, wherein after the control device controls the bypass solenoid valve to conduct, the control device is further configured to:

4. The air-source heat pump apparatus of claim 1, wherein the water flow control valve is a mixing valve, and the control device is specifically configured to:

5. The air-source heat pump apparatus according to claim 4, wherein after the control device controls the mixing valve to increase the water flow of the bypass water flow path, the control device is further configured to:

6. The air-source heat pump apparatus of claim 2 or 4, wherein the control device is further configured to:

and controlling the compressor to stop running for a preset time period in response to the time that the target temperature is less than the ambient temperature exceeding a first time threshold.

7. The air-source heat pump apparatus of claim 6, wherein after the compressor stops operating for the preset period of time, the control device is further configured to:

8. The control method of the air source heat pump equipment is characterized in that the air source heat pump equipment further comprises a bypass water flow path, the bypass water flow path is arranged between the water outlet flow path and the water inlet flow path, and the bypass water flow path comprises a water flow control valve;

the control method comprises the following steps:

9. The method as claimed in claim 8, wherein the water flow control valve is a bypass solenoid valve, and the step of controlling the water flow control valve according to the target temperature to adjust the temperature of the cooling medium heat dissipation pipe by using the hot water in the outlet flow path comprises:

10. The control method of an air-source heat pump apparatus according to claim 9, characterized in that after the bypass solenoid valve is turned on, the control method further comprises:

11. The method as claimed in claim 8, wherein the water flow control valve is a water mixing valve, and the controlling the water flow control valve according to the target temperature to adjust the temperature of the cooling medium heat dissipation pipe by using the hot water in the water outlet flow path comprises:

12. The control method of an air-source heat pump apparatus according to claim 11, wherein after the controlling the mixing valve to increase the water flow rate of the bypass water flow path, the control method further comprises:

when the target temperature is higher than a third temperature threshold value, controlling the water mixing valve to reduce the water flow of the bypass water flow path; wherein the third temperature threshold is greater than the second temperature threshold.

13. The control method of the air source heat pump apparatus according to claim 9 or 11, characterized by further comprising:

14. The control method of an air-source heat pump apparatus according to claim 13, characterized in that after the compressor stops operating for the preset period of time, the control method further comprises:

15. An air-source heat pump apparatus comprising: memory, processor and computer program stored on the memory and executable on the processor, characterized in that the processor when executing the computer program implements a control method of an air-source heat pump apparatus according to any one of claims 8 to 14.

16. A computer-readable storage medium storing computer-executable instructions for causing a computer to perform the method of controlling an air-source heat pump apparatus according to any one of claims 8 to 14.