CN218763660U

CN218763660U - Heat pump type air conditioning unit

Info

Publication number: CN218763660U
Application number: CN202222794887.9U
Authority: CN
Inventors: 张建东; 崔振东
Original assignee: Zhongchuang Meizong Information Technology Chongqing Co ltd
Current assignee: Zhongchuang Meizong Information Technology Chongqing Co ltd
Priority date: 2022-10-21
Filing date: 2022-10-21
Publication date: 2023-03-28
Anticipated expiration: 2032-10-21

Abstract

The utility model provides a heat pump type air conditioning unit, which comprises a refrigerant circulation loop and a pressure adjusting pipeline, wherein the refrigerant circulation loop comprises a compressor and a plurality of working components which are connected with each other; the pressure regulating pipeline is connected in parallel to two sides of at least one working component; and the pressure regulating pipeline is provided with a regulating valve, and the regulating valve is used for controlling the opening and the closing of the pressure regulating pipeline.

Description

Heat pump type air conditioning unit

Technical Field

The utility model relates to an electrical apparatus field particularly, relates to a heat pump type air conditioning unit.

Background

At present, the circulation of the whole indoor unit and the outdoor unit is generally controlled by a throttle valve in the existing air conditioning system, and then the working conditions of all components are indirectly controlled, but the control mode cannot accurately control the temperature, the pressure and other parameters of the components such as a compressor, an outdoor heat exchanger, a liquid storage device and the like of the outdoor unit. Especially, in a low-temperature refrigeration mode, the pressure in the system is too low, the pressure of an indoor heat exchanger is reduced, the problem of frosting of the indoor heat exchanger is caused, the refrigerating capacity is reduced, and the refrigeration effect is reduced. During the high temperature mode of heating, current air conditioning system appears the system internal pressure too high easily, and the exhaust temperature of compressor is higher, and the compressor lasts to be in the environment work under the high temperature, influences the life of compressor.

Therefore, how to provide an air conditioning unit capable of stably operating the whole circulation system in a low-temperature cooling mode and a high-temperature heating mode is a problem to be solved at present.

SUMMERY OF THE UTILITY MODEL

The present invention aims at least solving one of the technical problems existing in the prior art or the related art.

Therefore, the first objective of the present invention is to provide a heat pump type air conditioning unit.

In view of this, the technical solution of the first aspect of the present invention provides a heat pump type air conditioning unit, including a refrigerant circulation loop and a pressure regulating pipeline, wherein the refrigerant circulation loop includes a compressor and a plurality of working components that are connected to each other; the pressure regulating pipeline is connected in parallel to two sides of at least one working component; and the pressure regulating pipeline is provided with a regulating valve which is used for controlling the opening and closing of the pressure regulating pipeline.

According to the utility model provides a heat pump type air conditioning unit, include: refrigerant circulation loop and pressure regulating pipeline, wherein, refrigerant circulation loop is exactly the circulation loop of whole air conditioner circulation system, for example: air conditioners in the prior art generally comprise an indoor heat exchanger, an outdoor heat exchanger, a compressor and the like. The working components in the scheme can be: indoor heat exchanger, outdoor heat exchanger, reservoir etc.. The refrigerant circulation loop is used for circulating refrigerant among various parts such as an indoor heat exchanger, an outdoor heat exchanger, a liquid storage device, a compressor and the like to finish indoor refrigeration or heating. In addition, this scheme still is provided with the pressure regulation pipeline, the pressure regulation pipeline connects in parallel in at least one working element's both sides, and set up the governing valve on the pressure regulation pipeline, the pressure regulation pipeline can shunt a certain section in the refrigerant circulation circuit, avoid the refrigerant to flow into in certain working element, let the refrigerant flow back to in the compressor through the pressure regulation pipeline of extra setting, especially when air conditioning unit is at low temperature refrigeration or high temperature heating mode, partly refrigerant does not participate in the circulation of whole return circuit through the pressure regulation pipeline, flow back to in the compressor more rapidly, in time supply the air input of compressor, and then improve the discharge capacity of compressor, make whole refrigerant circulation circuit more smooth, avoid indoor heat exchanger can appear the problem of frosting, and simultaneously, also can promote air conditioning system's refrigeration effect. The pressure regulating pipeline is adopted to regulate the circulation of the refrigerant circulation loop, the structure is simple, and the stable operation of the air conditioning unit in a low-temperature refrigeration mode and a high-temperature heating mode can be ensured.

In the above technical solution, the compressor includes an air inlet and an air outlet; the plurality of working components includes: reversing valve, outdoor heat exchanger, indoor heat exchanger. The compressor comprises an air inlet and an air outlet, and a first port of the reversing valve is connected with the air outlet; the first end of the outdoor heat exchanger is connected with the second port of the reversing valve; one end of the indoor heat exchanger is connected with the other end of the outdoor heat exchanger, the other end of the indoor heat exchanger is connected with a third port of the reversing valve, and a fourth port of the reversing valve is communicated with the air inlet; the pressure regulating circuit includes: one end of the first pipeline is connected between the second port and the outdoor heat exchanger, and the other end of the first pipeline is connected between the outdoor heat exchanger and the indoor heat exchanger; the governing valve includes: and the first valve body is arranged on the first pipeline and is used for controlling the opening and closing of the first pipeline.

In this solution, the working part includes: the outdoor heat exchanger comprises a reversing valve (specifically a four-way reversing valve which is provided with a first port, a second port, a third port and a fourth port), an outdoor heat exchanger and an indoor heat exchanger. The compressor comprises an air inlet and an air outlet, the air outlet of the compressor and one end of the outdoor heat exchanger are connected through a first port and a second port of the four-way reversing valve or connected through a first port and a third port, the other end of the outdoor heat exchanger is communicated with the indoor heat exchanger, and the indoor heat exchanger and the air inlet of the compressor are connected through a third port and a fourth port of the four-way reversing valve or connected through a second port and a fourth port. When in a refrigeration mode, the first port and the second port of the four-way reversing valve are communicated, and the third port and the fourth port are communicated; and in the heating mode, the first port and the third port of the four-way reversing valve are communicated, and the second port and the fourth port are communicated. For example: in a refrigeration mode, a high-temperature high-pressure gas refrigerant is output from an air outlet of the compressor, flows through the second port through the first port of the four-way reversing valve, and then flows to the outdoor heat exchanger, at the moment, the outdoor heat exchanger is also a condenser, the high-temperature high-pressure gas refrigerant is liquefied into a normal-temperature high-pressure liquid refrigerant, the liquid refrigerant flows to the indoor heat exchanger, at the moment, the indoor heat exchanger is also an evaporator, the normal-temperature high-pressure liquid refrigerant is vaporized and converted into the normal-temperature normal-pressure gas refrigerant, meanwhile, the refrigerant absorbs heat due to phase change, cold air is blown out, and finally the normal-temperature normal-pressure gas refrigerant flows to the compressor through the indoor heat exchanger, so that the whole cycle is completed. In addition, the pressure regulating pipeline of this application includes first pipeline, and wherein, first tube coupling has first valve body in outdoor heat exchanger's both sides on the first pipeline, and first valve body can control switching on of first pipeline, that is to say, first pipeline is extra setting at refrigerant circulation circuit, can understand that refrigerant circulation circuit is the main cycle, and first pipeline is auxiliary cycle. In the low-temperature refrigeration mode, the required refrigeration capacity is large, the exhaust pressure of the compressor is reduced, the circulating flow rate of the whole system is reduced, and the liquid flow of the indoor heat exchanger is slow, so that frosting is caused, and the refrigeration capacity of the compressor is reduced. Adopt the scheme of this application, when the discharge pressure of compressor is less than a certain numerical value, first valve body is opened, and first pipeline switches on, and partly refrigerant is not through outdoor heat exchanger, and direct flow to indoor heat exchanger, and then accomplish the circulation sooner, makes the refrigerant backward flow to inside the compressor, and then improves the discharge pressure of compressor to improve whole endless pressure, improve the velocity of flow of refrigerant among the indoor heat exchanger, prevent that indoor heat exchanger from frosting, can strengthen the refrigeration efficiency of air conditioning unit when low temperature is refrigerated.

In another aspect, the pressure regulating circuit further comprises: one end of the second pipeline is connected to the air inlet, and the other end of the second pipeline is connected to the air outlet; the governing valve includes: and a second valve body provided on the second line, the second valve body being for controlling opening and closing of the second line.

In this technical scheme, the pressure regulating pipeline still includes the second pipeline, and the one end of second pipeline is connected to the air inlet of compressor, and the other end is connected to the gas outlet of compressor, that is to say, the second pipeline is parallelly connected in compressor both sides, and in some cases, the compressor both ends also can set up vapour and liquid separator and oil content device, and vapour and liquid refrigerant is used for separating gaseous refrigerant and liquid refrigerant, and the oil content device is used for separating lubricating oil to inside the lubricating oil backward flow to the compressor after will separating. In addition, the regulating valve also comprises a second valve body arranged on the second pipeline, and the conduction of the second pipeline is controlled through the second valve body. That is to say, the second pipeline is additionally arranged in the refrigerant circulation loop, when the exhaust pressure of the compressor is too low, the second valve body is opened (the exhaust pressure for opening the second valve body is less than the exhaust pressure for opening the first valve body), part of gas output from the compressor directly returns to the compressor through the second pipeline without participating in the overall circulation of the indoor heat exchanger and the outdoor heat exchanger, the second pipeline can shorten the circulation distance of the refrigerant, and supplement the gas in the compressor in time to improve the exhaust pressure of the compressor, so that the frosting of the indoor unit can be prevented in the low-temperature refrigeration mode, and the refrigeration efficiency of the compressor is improved.

In the above technical solution, the working member further includes: the first pressure sensor is arranged at the air outlet and used for detecting the discharge pressure value of the compressor; the first valve body and the second valve body adjust the opening according to the exhaust pressure value.

In this solution, the working component further includes a first pressure sensor, where the first pressure sensor is disposed at an exhaust port of the compressor and is used to detect a value of the exhaust pressure, and further, the first valve body and the second valve body may adjust an opening degree of the valve body according to the value of the exhaust pressure, such as: when the exhaust pressure is less than 2.6MPa, opening the first valve body, wherein the opening degree is 100%; when the exhaust pressure is less than 2.4MPa, the second valve body is opened, and the opening degree is 100%. The first valve body can be an electric ball valve, the second valve body can be an electromagnetic valve, meanwhile, a plurality of pressure threshold values are set, and the pressure threshold values correspond to different valve body opening degrees, so that the exhaust pressure of the compressor is accurately controlled.

In another aspect, the pressure regulating circuit further comprises: one end of the third pipeline is connected between the outdoor heat exchanger and the indoor heat exchanger, and the other end of the third pipeline is connected to the air inlet; the governing valve includes: and a third valve body disposed on the third line, the third valve body for controlling opening and closing of the third line.

In this technical scheme, the pressure regulating pipeline still includes the third pipeline, and the third pipeline setting is in the both sides of compressor and outdoor heat exchanger, that is to say, the one end setting of third pipeline is in the air inlet department of compressor, and the other end sets up between outdoor heat exchanger and the indoor heat exchanger, and in addition, the governing valve still includes the third valve body that sets up on the third pipeline, and the third valve body is used for switching on of third pipeline. When the exhaust temperature of the compressor is high, the third valve body is opened, and a part of liquid refrigerant flowing out of the outdoor heat exchanger flows to the direction of the compressor, but does not flow to the indoor heat exchanger, namely does not participate in the circulation of the indoor unit. In addition, a gas-liquid separator is arranged in front of the compressor, namely, a part of liquid refrigerant from the outdoor heat exchanger flows to the gas-liquid separator through a third pipeline, the liquid refrigerant is vaporized in the gas-liquid separator, and the vaporization absorbs heat, so that the temperature of the refrigerant in the gas-liquid separator is reduced, meanwhile, the temperature of the refrigerant flowing into the compressor is reduced, the exhaust temperature of the compressor is reduced, the use safety of the compressor is protected, and the service life of the compressor is prolonged.

In the above technical solution, the working member further includes: an inlet of the liquid storage device is connected to the outdoor heat exchanger, and an outlet of the liquid storage device is connected to the indoor heat exchanger; one end of the third pipeline is connected with the liquid inlet of the liquid storage device, and the other end of the third pipeline is connected with the air inlet.

In this technical scheme, the working part still includes the reservoir, and the reservoir is connected between outdoor heat exchanger and indoor heat exchanger, that is to say, the inlet at the reservoir is connected to the one end of third pipeline, and the air inlet at the compressor is connected to the other end. Compare in connecting between the liquid outlet of reservoir and the air inlet of compressor, this scheme can adjust the volume of the liquid refrigerant that enters into the reservoir, under some extreme circumstances, when the refrigerant content in the reservoir is unusual big, can be through opening the third valve body, return some refrigerant to the compressor in, reduce the stock solution pressure of reservoir, simultaneously when the liquid output volume in the reservoir is great, the circulation refrigerant content in the refrigerant circulation circuit is just less relatively, also can supply the circulation refrigerant in the refrigerant circulation circuit with the inlet of third pipeline setting in the reservoir, thereby be favorable to the main cycle of refrigerant in the air conditioning unit.

In the above technical solution, the working member further includes: the temperature sensor is arranged at the air outlet of the compressor and used for detecting the air outlet temperature of the compressor; the third valve body adjusts the opening according to the exhaust temperature.

In the technical scheme, the working component further comprises a temperature sensor, the temperature sensor is arranged at an exhaust port of the compressor and can detect the exhaust temperature of the compressor in real time, when the compressor is used for refrigerating or heating, the exhaust temperature of the compressor can be changed due to the change of refrigerating capacity or heating capacity, but when the exhaust temperature of the compressor is higher than 90 ℃, the temperature of gas inside the compressor is higher than 90 ℃, the setting is higher than the exhaust temperature, and at the moment, the service life of the compressor can be seriously influenced no matter in a refrigerating mode or a heating mode. The third valve body can be according to the aperture of the exhaust temperature adjustment third valve body of compressor, when detecting that exhaust temperature is higher than 90 ℃, open the third valve body, the liquid refrigerant partly that comes out from outdoor heat exchanger flows to vapour and liquid separator through the third pipeline, liquid refrigerant can vaporize in vapour and liquid separator, the vaporization is endothermic, thereby reduce the temperature of refrigerant, microthermal refrigerant enters into the compressor, through the inlet air temperature who reduces the compressor, and then reduce the exhaust temperature of compressor, thereby the safety in utilization of protection compressor, the life of compressor is prolonged.

In any of the above technical solutions, the working member further includes: the filter is connected between the outdoor heat exchanger and the indoor heat exchanger; the throttle valve is arranged between the filter and the indoor heat exchanger; the pressure regulating circuit further includes: one end of the fourth pipeline is connected to an outlet of the liquid storage device, and the other end of the fourth pipeline is connected to the indoor heat exchanger; and a fourth valve body is arranged on the fourth pipeline and used for controlling the fourth pipeline to be opened and closed.

In this solution, the working member further includes: the filter and the throttle valve, wherein, the filter is connected between indoor heat exchanger and outdoor heat exchanger, the throttle valve sets up between filter and indoor heat exchanger, and the filth in the pipeline can be filtered to the filter, and the iron fillings that oxide and compressor produced during operation are filtered and are clear away these impurity through the filter, guarantee that the refrigerant can circulate smoothly, flow out to the throttle valve in the follow filter, through the flow of throttle valve control refrigerant, and the throttle valve has maximum aperture, just also makes to have the flow upper limit of refrigerant in throttle valve department. Especially, when the exhaust pressure of the compressor is insufficient or too large, the exhaust pressure of the compressor cannot be adjusted even if the throttle valve is adjusted to the maximum opening degree. When the air inlet pressure of the compressor is insufficient in the refrigeration mode, smoothness of the whole circulation is affected, the refrigerant flow of the throttle valve has an upper limit, a part of refrigerant can flow to the indoor heat exchanger through the fourth pipeline by opening the fourth valve body, the upper limit of the flow flowing to the indoor heat exchanger is improved, the air inlet pressure of the compressor is further improved by improving the refrigerant flow flowing to the indoor heat exchanger, and the whole circulation of the indoor heat exchanger and the outdoor heat exchanger is guaranteed. In the heating mode, when the exhaust pressure is too large, namely, the gas flow output from the compressor flows to the liquid storage device through the indoor heat exchanger, a large amount of liquid is stored in the liquid storage device, the throttling valve has an upper flow limit, and at the moment, the fourth valve body is opened, so that the liquid before the throttling valve can be conducted to the outdoor heat exchanger, and the pressure in the whole circulation system is averaged.

In the above technical solution, the working part further includes: the second pressure sensor is arranged at the air inlet of the compressor and used for detecting the air inlet pressure value of the compressor; the fourth valve body adjusts the opening according to the air inlet pressure value of the compressor.

In this technical scheme, the working part still includes second pressure sensor, and second pressure sensor sets up in the air inlet department of compressor for real-time detection compressor's inlet pressure, and simultaneously, the opening of fourth valve body can be adjusted according to the numerical value that second pressure sensor detected to the fourth valve body. A liquid storage device is also arranged between the outdoor heat exchanger and the filter. In the refrigeration mode, when the second pressure sensor detects that the air inlet pressure of the compressor is less than 0.7MPa, the fourth valve body is opened, and a part of refrigerant directly flows to the indoor heat exchanger through the fourth pipeline, so that the air inlet pressure of the compressor is improved. When the heating mode, when the discharge pressure that first pressure sensor detected is greater than 3.8MPa, most refrigerants can be because the existence of choke valve, and pile up in the reservoir, be unfavorable for entire system's circulation, open the fourth valve body this moment, extra a plurality of pipeline flow direction outdoor heat exchanger, can improve the flowing back ability of reservoir through fourth valve body and fourth pipeline, under some extreme circumstances, break through the flow restriction of choke valve, and then adjust the pressure in the whole circulation, guarantee that air conditioning unit can normal operating under the operating mode of difference.

In the above technical solution, the working member further includes: the first one-way valve is arranged between the outdoor heat exchanger and the liquid storage device and used for communicating the outdoor heat exchanger with the liquid storage device in a refrigeration mode; the second one-way valve is arranged between the liquid reservoir and the indoor heat exchanger and used for communicating the liquid reservoir with the indoor heat exchanger in a refrigeration mode; the third one-way valve is arranged between the liquid storage device and the outdoor heat exchanger and is used for communicating the liquid storage device with the outdoor heat exchanger in the heating mode; the fourth check valve is arranged between the indoor heat exchanger and the outdoor heat exchanger and used for communicating the indoor heat exchanger with the outdoor heat exchanger in the heating mode.

In this technical scheme, the working part still includes four check valves, first check valve, second check valve, third check valve, fourth check valve promptly, accomplishes the switching of refrigeration mode and heating mode according to the in service behavior of four switching-over valves, specifically, first check valve and second check valve are used for the refrigeration mode, and during the refrigeration mode, the flow path in the whole system is: the compressor outputs high-temperature and high-pressure gas, the high-temperature and high-pressure gas passes through the oil separation device, flows to the first port of the four-way reversing valve, passes through the second port of the four-way reversing valve, is reserved to the outdoor heat exchanger, flows to the liquid reservoir through the first reversing valve, then to the filter and the throttle valve, passes through the second one-way valve, then flows to the indoor heat exchanger, is converted from liquid to gas in the indoor heat exchanger, absorbs heat through phase change, meets the refrigeration requirement, flows to the third port of the four-way reversing valve through the indoor heat exchanger, flows to the gas-liquid separator through the fourth port of the four-way reversing valve, and finally flows back to the compressor, so that the whole cycle is formed. When in heating mode, the compressor outputs high-temperature and high-pressure gas, the gas passes through the first port of the reversing valve through the oil separation device and flows to the indoor heat exchanger through the third port of the reversing valve, the high-temperature and high-pressure gas is liquefied into liquid refrigerant in the indoor heat exchanger, heat is released through phase change, the heating requirement is completed, then the refrigerant flows to the liquid storage device through the third one-way valve, passes through the filter and the throttle valve and then flows to the outdoor heat exchanger through the fourth one-way valve, and the gas-liquid separator and the compressor flow back to the second port and the fourth port sequentially through the reversing valve. The refrigerating and heating requirements of a user are met through reasonable use of the one-way valve and the four-way reversing valve, and the control mode is simple, convenient and low in cost.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic diagram showing a heat pump type air conditioning unit according to an embodiment of the present invention;

fig. 2 shows another schematic structural diagram of a heat pump type air conditioning unit according to an embodiment of the present invention.

Wherein, the correspondence between the reference numbers and the part names of fig. 1 and fig. 2 is:

10 compressor, 101 air inlet, 102 air outlet, 1021 first pressure sensor, 11 outdoor heat exchanger, 12 reversing valve, 13 indoor heat exchanger, 14 reservoir, 15 temperature sensor, 16 filter, 17 throttle valve, 18 second pressure sensor, 191 first check valve, 192 second check valve, 193 third check valve, 194 fourth check valve, 100 refrigerant circulation loop, 200 pressure regulating pipeline, 2001 regulating valve, 210 first pipeline, 2101 first valve body, 220 second pipeline, 2201 second valve body, 230 third pipeline, 2301 third valve body, 240 fourth pipeline, 2401 fourth valve body.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

A heat pump type air conditioning unit according to the present invention will be described with reference to fig. 1 and 2.

Example one

According to the utility model provides a heat pump type air conditioning unit, as shown in FIG. 1, include: a refrigerant circulation loop 100 and a pressure adjusting pipeline 200, wherein the refrigerant circulation loop 100 is a circulation loop of the whole air conditioning circulation system, such as: the conventional air conditioner generally includes an indoor heat exchanger 13, an outdoor heat exchanger 11, a compressor 10, and the like. The working components in this embodiment may be: an indoor heat exchanger 13, an outdoor heat exchanger 11, a reservoir 14, etc. The refrigerant circulation circuit 100 is a circuit in which a refrigerant circulates among a plurality of working components such as the indoor heat exchanger 13, the outdoor heat exchanger 11, the accumulator 14, and the compressor 10 to perform cooling or heating of the room. In addition, the scheme is further provided with a pressure regulating pipeline 200, the pressure regulating pipeline 200 is connected to two sides of at least one working component in parallel, the regulating valve 2001 is arranged on the pressure regulating pipeline 200, the pressure regulating pipeline 200 can divide a certain section in the refrigerant circulation loop 100, the condition that the refrigerant flows into a certain working component is avoided, the refrigerant flows back into the compressor 10 through the additionally arranged pressure regulating pipeline 200, especially when the air conditioning unit is in a low-temperature refrigeration mode or a high-temperature heating mode, a part of the refrigerant does not participate in the circulation of the whole loop through the pressure regulating pipeline 200, and flows back into the compressor 10 more quickly, the air inflow of the compressor 10 is supplemented in time, the air displacement of the compressor 10 is further improved, the whole refrigerant circulation loop 100 is enabled to be smoother, the problem that the indoor heat exchanger 13 is frosted is avoided, and meanwhile, the refrigeration effect of the air conditioning system can also be improved. The pressure adjusting pipeline 200 is adopted to adjust the circulation of the refrigerant circulation loop 100, the structure is simple, and the stable operation of the air conditioning unit in a low-temperature refrigeration mode and a high-temperature heating mode can be ensured.

Example two

In one embodiment, as shown in fig. 2, the working components include: a reversing valve 12 (which may be a four-way reversing valve 12, the four-way reversing valve 12 having a first port, a second port, a third port and a fourth port), an outdoor heat exchanger 11, and an indoor heat exchanger 13. The compressor 10 includes an air inlet 101 and an air outlet 102, the air outlet 102 of the compressor 10 is connected to one end of the outdoor heat exchanger 11 through a first port and a second port or a first port and a third port of the four-way reversing valve 12, the other end of the outdoor heat exchanger 11 is communicated with the indoor heat exchanger 13, and the indoor heat exchanger 13 is connected to the air inlet 101 of the compressor 10 through a third port and a fourth port or a second port and a fourth port of the four-way reversing valve 12. In the refrigeration mode, the first port and the second port of the four-way reversing valve 12 are communicated, and the third port and the fourth port are communicated; in the heating mode, the first port and the third port of the four-way reversing valve 12 are communicated, and the second port and the fourth port are communicated. For example: in the cooling mode, the gas outlet 102 of the compressor 10 outputs a high-temperature high-pressure gaseous refrigerant, the high-temperature high-pressure gaseous refrigerant flows through the second port through the first port of the four-way reversing valve 12 and then flows to the outdoor heat exchanger 11, at this time, the outdoor heat exchanger 11 is also a condenser to liquefy the high-temperature high-pressure gaseous refrigerant into a normal-temperature high-pressure liquid refrigerant, the liquid refrigerant flows to the indoor heat exchanger 13, at this time, the indoor heat exchanger 13 is also an evaporator, the normal-temperature high-pressure liquid refrigerant is vaporized and converted into the normal-temperature normal-pressure gaseous refrigerant, and meanwhile, due to phase change of the refrigerant, cold air is blown out, and finally the normal-temperature normal-pressure liquid refrigerant flows to the compressor 10 through the indoor heat exchanger 13, so that the whole cycle is completed. In addition, the pressure regulating pipeline 200 of the present application includes the first pipeline 210, wherein the first pipeline 210 is connected to two sides of the outdoor heat exchanger 11, the first pipeline 210 is provided with the first valve 2101, and the first valve 2101 can control the conduction of the first pipeline 210, that is, the first pipeline 210 is additionally disposed on the refrigerant circulation circuit 100, and it can be understood that the refrigerant circulation circuit 100 is a main cycle, and the first pipeline 210 is an auxiliary cycle. In the low-temperature refrigeration mode, the required refrigeration capacity is relatively large, the discharge pressure of the compressor 10 is reduced, the circulation flow rate of the whole system is reduced, and the liquid flow of the indoor heat exchanger 13 is relatively slow, so that frosting is caused, and the refrigeration capacity of the compressor 10 is reduced. Adopt the scheme of this application, when the discharge pressure of compressor 10 is less than a certain numerical value, first valve body 2101 is opened, first pipeline 210 switches on, partly refrigerant is not through outdoor heat exchanger 11, direct flow direction indoor heat exchanger 13, and then accomplish the circulation more fast, make the refrigerant backward flow to inside the compressor 10, and then improve the discharge pressure of compressor 10, in order to improve whole endless pressure, improve the velocity of flow of refrigerant among the indoor heat exchanger 13, prevent that indoor heat exchanger 13 from frosting, can strengthen the refrigeration efficiency of air conditioning unit when low temperature is refrigerated.

EXAMPLE III

In another embodiment, as shown in fig. 2, the pressure regulating pipeline 200 further includes a second pipeline 220, one end of the second pipeline 220 is connected to the air inlet 101 of the compressor 10, and the other end is connected to the air outlet 102 of the compressor 10, that is, the second pipeline 220 is connected in parallel to both sides of the compressor 10, in some cases, a gas-liquid separator and an oil separator may be disposed at both ends of the compressor 10, the gas-liquid separator is used for separating the gaseous refrigerant from the liquid refrigerant, and the oil separator is used for separating the lubricating oil and returning the separated lubricating oil to the interior of the compressor 10. The regulator valve 2001 further includes a second valve body 2201 provided in the second pipe 220, and the second valve body 2201 controls the conduction of the second pipe 220. That is, the second pipe 220 is additionally provided in the refrigerant circulation circuit 100, and when the discharge pressure of the compressor 10 is too low, the second valve body 2201 is opened (the discharge pressure of the opened second valve body 2201 is smaller than the discharge pressure of the opened first valve body 2101), and a part of the gas output from the compressor 10 directly returns to the compressor 10 through the second pipe 220 without participating in the overall cycle of the indoor heat exchanger 13 and the outdoor heat exchanger 11, so that the second pipe 220 can shorten the circulation distance of the refrigerant, supplement the gas in the compressor 10 in time, increase the discharge pressure of the compressor 10, prevent the indoor unit from frosting in the low-temperature refrigeration mode, and improve the refrigeration efficiency of the compressor 10.

The working components further include a first pressure sensor 1021, the first pressure sensor 1021 is arranged at the exhaust port of the compressor 10 and is used for detecting the value of the exhaust pressure, and further, the first valve body 2101 and the second valve body 2201 can adjust the opening degree of the valve 2001 according to the value of the exhaust pressure, such as: when the exhaust pressure is less than 2.6MPa, opening the first valve body 2101, wherein the opening degree is 100%; when the exhaust pressure is less than 2.4MPa, the second valve body 2201 is opened by 100%. The first valve body 2101 may be an electric ball valve, the second valve body 2201 may be an electromagnetic valve, and a plurality of pressure thresholds corresponding to different valve body openings are set, so as to precisely control the discharge pressure of the compressor 10.

Example four

In another embodiment, as shown in fig. 2, the pressure regulating circuit 200 further includes a third circuit 230, the third circuit 230 is disposed on both sides of the compressor 10 and the outdoor heat exchanger 11, that is, one end of the third circuit 230 is disposed at the air inlet 101 of the compressor 10, and the other end is disposed between the outdoor heat exchanger 11 and the indoor heat exchanger 13, and the regulating valve 2001 further includes a third valve body 2301 disposed on the third circuit 230, and the third valve body 2301 is used for conducting the third circuit 230. When the discharge temperature of the compressor 10 is high, the third valve 2301 is opened, and a part of the liquid refrigerant flowing out of the outdoor heat exchanger 11 flows toward the compressor 10, but does not flow toward the indoor heat exchanger 13, i.e., does not participate in the circulation of the indoor unit. In addition, a gas-liquid separator is further disposed before the compressor 10, that is, a part of the liquid refrigerant from the outdoor heat exchanger 11 flows to the gas-liquid separator through the third pipe 230, and the liquid refrigerant is vaporized in the gas-liquid separator, so that the vaporization absorbs heat, thereby reducing the temperature of the refrigerant in the gas-liquid separator, and simultaneously reducing the temperature of the refrigerant flowing into the compressor 10, thereby reducing the exhaust temperature of the compressor 10, protecting the safety of the compressor 10, and prolonging the service life of the compressor 10.

The working part further includes an accumulator 14, and the accumulator 14 is connected between the outdoor heat exchanger 11 and the indoor heat exchanger 13, that is, one end of the third pipe 230 is connected to an inlet of the accumulator 14, and the other end is connected to the air inlet 101 of the compressor 10. Compared with the connection between the liquid outlet of the liquid storage device 14 and the air inlet 101 of the compressor 10, the liquid refrigerant amount entering the liquid storage device 14 can be adjusted according to the scheme, under some extreme conditions, when the refrigerant content in the liquid storage device 14 is abnormally large, a part of the refrigerant can flow back to the compressor 10 by opening the third valve 2301, the liquid storage pressure of the liquid storage device 14 is reduced, meanwhile, when the liquid output amount in the liquid storage device 14 is large, the circulating refrigerant content in the refrigerant circulating loop 100 is relatively small, the circulating refrigerant in the refrigerant circulating loop 100 can be supplemented by arranging the third pipeline 230 at the liquid inlet of the liquid storage device 14, and therefore the main circulation of the refrigerant in the air conditioning unit is facilitated.

The working component further comprises a temperature sensor 15, the temperature sensor 15 is arranged at an exhaust port of the compressor 10, and can detect the exhaust temperature of the compressor 10 in real time, when in refrigeration or heating, the exhaust temperature of the compressor 10 can change due to the change of the refrigeration quantity or the heating quantity, but when the exhaust temperature of the compressor 10 is higher than 90 ℃, namely the gas temperature inside the compressor 10 is higher than 90 ℃, the setting is higher than the exhaust temperature, and at this time, the service life of the compressor 10 can be seriously influenced in both the refrigeration mode and the heating mode. The third valve 2301 can adjust the opening degree of the third valve 2301 according to the discharge temperature of the compressor 10, when the discharge temperature is higher than 90 ℃, the third valve 2301 is opened, a part of the liquid refrigerant coming out of the outdoor heat exchanger 11 flows to the gas-liquid separator through the third pipeline 230, the liquid refrigerant is vaporized in the gas-liquid separator, the vaporization absorbs heat, the temperature of the refrigerant is reduced, the low-temperature refrigerant enters the compressor 10, the intake temperature of the compressor 10 is reduced, the discharge temperature of the compressor 10 is further reduced, the use safety of the compressor 10 is protected, and the service life of the compressor 10 is prolonged.

EXAMPLE five

In another embodiment, as shown in fig. 2, the working member further comprises: the filter 16 and the throttle valve 17, wherein the filter 16 is connected between the indoor heat exchanger 13 and the outdoor heat exchanger 11, the throttle valve 17 is arranged between the filter 16 and the indoor heat exchanger 13, the filter 16 can filter dirt, oxide and iron filings generated when the compressor 10 operates, the filter 16 filters and removes the impurities, the smooth circulation of the refrigerant is ensured, the refrigerant flows out of the filter 16 to the throttle valve 17, the flow of the refrigerant is controlled through the throttle valve 17, and the throttle valve 17 has the maximum opening degree, so that the upper limit of the flow of the refrigerant exists at the throttle valve 17. Especially, when the discharge pressure of the compressor 10 is insufficient or excessive, the discharge pressure of the compressor 10 cannot be adjusted even if the throttle valve 17 is adjusted to the maximum opening degree, and for this reason, a fourth pipe 240 is further provided, and is connected between the indoor heat exchanger 13 and the filter 16 through one end of the fourth pipe 240, and the other end is directly connected between the indoor heat exchanger 13 and the filter 16, and a fourth valve body 2401 is further provided on the fourth pipe 240, and the fourth valve body 2401 is used for controlling the conduction of the fourth pipe 240. In the cooling mode, when the intake pressure of the compressor 10 is insufficient, the smoothness of the whole cycle may be affected, and the refrigerant flow rate of the throttle valve 17 has an upper limit, and by opening the fourth valve body 2401, a part of the refrigerant flows to the indoor heat exchanger 13 through the fourth pipeline 240, which increases the upper limit of the flow rate flowing to the indoor heat exchanger 13, and by increasing the refrigerant flow rate flowing to the indoor heat exchanger 13, the intake pressure of the compressor 10 is further increased, thereby ensuring the whole cycle of the indoor heat exchanger 13 and the outdoor heat exchanger 11. In the heating mode, when the discharge pressure is too large, that is, when the gas flow outputted from the compressor 10 flows to the accumulator 14 through the indoor heat exchanger 13, a large amount of liquid is stored in the accumulator 14, and the throttle 17 has an upper flow limit, the fourth valve body 2401 is opened to open the liquid before the throttle 17 to the outdoor heat exchanger 11, thereby averaging the pressure in the entire cycle system.

Meanwhile, the working part further includes a second pressure sensor 18, the second pressure sensor 18 is disposed at the air inlet 101 of the compressor 10 and is used for detecting the intake pressure of the compressor 10 in real time, and meanwhile, the fourth valve body 2401 can adjust the opening degree of the fourth valve body 2401 according to the value detected by the second pressure sensor 18. An accumulator 14 is also provided between the outdoor heat exchanger 11 and the filter 16. In the cooling mode, when the second pressure sensor 18 detects that the intake pressure of the compressor 10 is less than 0.7MPa, the fourth valve body 2401 is opened, so that a part of the refrigerant directly flows to the indoor heat exchanger 13 through the fourth pipeline 240, thereby increasing the intake pressure of the compressor 10. During the heating mode, when the discharge pressure that first pressure sensor 1021 detected is greater than 3.8MPa, most refrigerants can be piled up in reservoir 14 because of the existence of choke valve 17, be unfavorable for the circulation of entire system, open fourth valve body 2401 this moment, extra a more than one pipeline flows to outdoor heat exchanger 11, can improve the flowing back ability of reservoir 14 through fourth valve body 2401 and fourth pipeline 240, under some extreme circumstances, break through the flow restriction of choke valve 17, and then adjust the pressure in the whole circulation, guarantee that air conditioning unit can normal operating under the operating mode of difference.

EXAMPLE six

According to the utility model provides a pair of heat pump type air conditioning unit, as shown in FIG. 2, include: a refrigerant circulation loop 100 and a pressure regulating pipeline 200, wherein the refrigerant circulation loop 100 is a circulation loop of the whole air conditioning circulation system, for example: the related art air conditioner generally includes an indoor heat exchanger 13, an outdoor heat exchanger 11, a compressor 10, and the like. The working components in the scheme can be: indoor heat exchanger, outdoor heat exchanger, reservoir etc.. The refrigerant circulation circuit 100 is a circuit in which a refrigerant circulates among the respective components such as the indoor heat exchanger 13, the outdoor heat exchanger 11, the accumulator 14, and the compressor 10 to perform cooling or heating of the room. In addition, the scheme is further provided with a pressure regulating pipeline 200, the pressure regulating pipeline 200 is connected to two sides of at least one working component in parallel, the regulating valve 2001 is arranged on the pressure regulating pipeline 200, the pressure regulating pipeline 200 can divide a certain section in the refrigerant circulation loop 100, the condition that the refrigerant flows into a certain working component is avoided, the refrigerant flows back into the compressor 10 through the additionally arranged pressure regulating pipeline 200, especially when the air conditioning unit is in a low-temperature refrigeration mode or a high-temperature heating mode, a part of the refrigerant does not participate in the circulation of the whole loop through the pressure regulating pipeline 200, and flows back into the compressor 10 more quickly, the air inflow of the compressor 10 is supplemented in time, the air displacement of the compressor 10 is further improved, the whole refrigerant circulation loop 100 is enabled to be smoother, the problem that the indoor heat exchanger 13 is frosted is avoided, and meanwhile, the refrigeration effect of the air conditioning system can also be improved. The pressure adjusting pipeline 200 is adopted to adjust the circulation of the refrigerant circulation loop 100, the structure is simple, and the stable operation of the air conditioning unit in a low-temperature refrigeration mode and a high-temperature heating mode can be ensured.

In this embodiment, the working parts include: a reversing valve 12 (specifically, a four-way reversing valve 12, the four-way reversing valve 12 has a first port, a second port, a third port and a fourth port), an outdoor heat exchanger 11, and an indoor heat exchanger 13. The compressor 10 comprises an air inlet 101 and an air outlet 102, the air outlet 102 of the compressor 10 is connected with one end of the outdoor heat exchanger 11 through a first port and a second port or a first port and a third port of the four-way reversing valve 12, the other end of the outdoor heat exchanger 11 is communicated with the indoor heat exchanger 13, and the indoor heat exchanger 13 is connected with the air inlet 101 of the compressor 10 through a third port and a fourth port or a second port and a fourth port of the four-way reversing valve 12. During the refrigeration mode, the first port and the second port of the four-way reversing valve 12 are communicated, and the third port and the fourth port are communicated; in the heating mode, the first port and the third port of the four-way reversing valve 12 are communicated, and the second port and the fourth port are communicated. For example: in the cooling mode, the gas outlet 102 of the compressor 10 outputs a high-temperature high-pressure gaseous refrigerant, the high-temperature high-pressure gaseous refrigerant flows through the second port through the first port of the four-way reversing valve 12 and then flows to the outdoor heat exchanger 11, at this time, the outdoor heat exchanger 11 is also a condenser to liquefy the high-temperature high-pressure gaseous refrigerant into a normal-temperature high-pressure liquid refrigerant, the liquid refrigerant flows to the indoor heat exchanger 13, at this time, the indoor heat exchanger 13 is also an evaporator, the normal-temperature high-pressure liquid refrigerant is vaporized and converted into the normal-temperature normal-pressure gaseous refrigerant, and meanwhile, due to phase change of the refrigerant, cold air is blown out, and finally the normal-temperature normal-pressure liquid refrigerant flows to the compressor 10 through the indoor heat exchanger 13, so that the whole cycle is completed. In addition, the pressure regulating pipeline 200 of the present application includes a first pipeline 210, wherein the first pipeline 210 is connected to two sides of the outdoor heat exchanger 11, the first pipeline 210 has a first valve 2101, and the first valve 2101 can control the conduction of the first pipeline 210, that is, the first pipeline 210 is additionally disposed in the refrigerant circulation circuit 100, and it can be understood that the refrigerant circulation circuit 100 is a main circulation and the first pipeline 210 is an auxiliary circulation. In the low-temperature refrigeration mode, the required refrigeration capacity is relatively large, the discharge pressure of the compressor 10 is reduced, the circulation flow rate of the whole system is reduced, and the liquid flow of the indoor heat exchanger 13 is relatively slow, so that frosting is caused, and the refrigeration capacity of the compressor 10 is reduced. Adopt the scheme of this application, when the discharge pressure of compressor 10 is less than a certain numerical value, first valve body 2101 is opened, first pipeline 210 switches on, partly refrigerant is not through outdoor heat exchanger 11, direct flow direction indoor heat exchanger 13, and then accomplish the circulation more fast, make the refrigerant backward flow to inside the compressor 10, and then improve the discharge pressure of compressor 10, in order to improve whole endless pressure, improve the velocity of flow of refrigerant among the indoor heat exchanger 13, prevent that indoor heat exchanger 13 from frosting, can strengthen the refrigeration efficiency of air conditioning unit when low temperature is refrigerated.

In this embodiment, the pressure adjusting circuit 200 further includes a second circuit 220, one end of the second circuit 220 is connected to the air inlet 101 of the compressor 10, and the other end is connected to the air outlet 102 of the compressor 10, that is, the second circuit 220 is connected in parallel to both sides of the compressor 10, in some cases, both ends of the compressor 10 may be provided with a gas-liquid separator for separating the gas refrigerant and the liquid refrigerant, and an oil separator for separating the lubricating oil and returning the separated lubricating oil to the inside of the compressor 10. The regulator valve 2001 further includes a second valve body 2201 provided in the second pipe 220, and the second valve body 2201 controls the conduction of the second pipe 220. That is, the second pipe 220 is additionally provided in the refrigerant circulation circuit 100, and when the discharge pressure of the compressor 10 is too low, the second valve body 2201 is opened (the discharge pressure of the opened second valve body 2201 is smaller than the discharge pressure of the opened first valve body 2101), and a part of the gas output from the compressor 10 directly returns to the compressor 10 through the second pipe 220 without participating in the overall cycle of the indoor heat exchanger 13 and the outdoor heat exchanger 11, so that the second pipe 220 can shorten the circulation distance of the refrigerant, supplement the gas in the compressor 10 in time, increase the discharge pressure of the compressor 10, prevent the indoor unit from frosting in the low-temperature refrigeration mode, and improve the refrigeration efficiency of the compressor 10.

In this embodiment, the working component further includes a first pressure sensor 1021, the first pressure sensor 1021 is arranged at the exhaust port of the compressor 10, and is used for detecting the value of the exhaust pressure, and further, the first valve body 2101 and the second valve body 2201 can adjust the opening degree of the valve 2001 according to the value of the exhaust pressure, such as: when the exhaust pressure is less than 2.6MPa, opening the first valve body 2101, wherein the opening degree is 100%; when the exhaust pressure is less than 2.4MPa, the second valve body 2201 is opened by 100%. The first valve 2101 may be an electric ball valve, the second valve 2201 may be an electromagnetic valve, and a plurality of pressure thresholds corresponding to different valve opening degrees are set, so as to precisely control the discharge pressure of the compressor 10.

In this embodiment, the pressure regulating circuit 200 further includes a third circuit 230, the third circuit 230 is disposed on both sides of the compressor 10 and the outdoor heat exchanger 11, that is, one end of the third circuit 230 is disposed at the air inlet 101 of the compressor 10, and the other end is disposed between the outdoor heat exchanger 11 and the indoor heat exchanger 13, and the regulating valve 2001 further includes a third valve body 2301 disposed on the third circuit 230, and the third valve body 2301 is used for conducting the third circuit 230. When the discharge temperature of the compressor 10 is high, the third valve 2301 is opened, and a part of the liquid refrigerant flowing out of the outdoor heat exchanger 11 flows toward the compressor 10, but does not flow toward the indoor heat exchanger 13, i.e., does not participate in the circulation of the indoor unit. In addition, a gas-liquid separator is further disposed before the compressor 10, that is, a part of the liquid refrigerant from the outdoor heat exchanger 11 flows to the gas-liquid separator through the third pipe 230, and the liquid refrigerant is vaporized in the gas-liquid separator, so that the vaporization absorbs heat, thereby reducing the temperature of the refrigerant in the gas-liquid separator, and simultaneously reducing the temperature of the refrigerant flowing into the compressor 10, thereby reducing the exhaust temperature of the compressor 10, protecting the safety of the compressor 10, and prolonging the service life of the compressor 10.

In this embodiment, the working part further includes an accumulator 14, and the accumulator 14 is connected between the outdoor heat exchanger 11 and the indoor heat exchanger 13, that is, one end of the third pipe line 230 is connected to an inlet of the accumulator 14, and the other end is connected to the air inlet 101 of the compressor 10. Compared with the connection between the liquid outlet of the liquid storage device 14 and the air inlet 101 of the compressor 10, the liquid refrigerant amount entering the liquid storage device 14 can be adjusted according to the scheme, under some extreme conditions, when the refrigerant content in the liquid storage device 14 is abnormally large, a part of the refrigerant can flow back to the compressor 10 by opening the third valve 2301, the liquid storage pressure of the liquid storage device 14 is reduced, meanwhile, when the liquid output amount in the liquid storage device 14 is large, the circulating refrigerant content in the refrigerant circulating loop 100 is relatively small, the circulating refrigerant in the refrigerant circulating loop 100 can be supplemented by arranging the third pipeline 230 at the liquid inlet of the liquid storage device 14, and therefore the main circulation of the refrigerant in the air conditioning unit is facilitated.

In this embodiment, the working components further include a temperature sensor 15, the temperature sensor 15 is disposed at an exhaust port of the compressor 10, and is capable of detecting an exhaust temperature of the compressor 10 in real time, and when cooling or heating is performed, the exhaust temperature of the compressor 10 may change due to a change in a cooling amount or a heating amount, but when the exhaust temperature of the compressor 10 is higher than 90 ℃, which means that a gas temperature inside the compressor 10 is higher than 90 ℃, the setting is higher than the exhaust temperature, and at this time, the service life of the compressor 10 may be seriously affected regardless of the cooling mode or the heating mode. The third valve 2301 can adjust the opening of the third valve 2301 according to the discharge temperature of the compressor 10, when the discharge temperature is higher than 90 ℃, the third valve 2301 is opened, a part of the liquid refrigerant coming out of the outdoor heat exchanger 11 flows to the gas-liquid separator through the third pipeline 230, the liquid refrigerant is vaporized in the gas-liquid separator, the vaporization absorbs heat, the temperature of the refrigerant is reduced, the low-temperature refrigerant enters the compressor 10, the intake temperature of the compressor 10 is reduced, the discharge temperature of the compressor 10 is reduced, the use safety of the compressor 10 is protected, and the service life of the compressor 10 is prolonged.

In this embodiment, the working member further includes: the filter 16 filters dirt, oxides and scrap iron generated during the operation of the compressor 10, the filter 16 filters and removes impurities through the filter 16 to ensure that the refrigerant can smoothly circulate, the impurities flow out of the filter 16 to the throttle valve 17, the flow of the refrigerant is controlled through the throttle valve 17, and the throttle valve 17 has the maximum opening degree, so that the upper limit of the flow of the refrigerant exists at the throttle valve 17. Especially, when the discharge pressure of the compressor 10 is insufficient or excessive, the discharge pressure of the compressor 10 cannot be adjusted even if the throttle valve 17 is adjusted to the maximum opening degree, and for this reason, a fourth pipe 240 is further provided, and is connected between the indoor heat exchanger 13 and the filter 16 through one end of the fourth pipe 240, and the other end is directly connected between the indoor heat exchanger 13 and the filter 16, and a fourth valve body 2401 is further provided on the fourth pipe 240, and the fourth valve body 2401 is used for controlling the conduction of the fourth pipe 240. In the cooling mode, when the intake pressure of the compressor 10 is insufficient, smoothness of the whole cycle is affected, the refrigerant flow rate of the throttle valve 17 has an upper limit, and by opening the fourth valve body 2401, a part of the refrigerant flows to the indoor heat exchanger 13 through the fourth pipeline 240, the upper limit of the flow rate flowing to the indoor heat exchanger 13 is increased, and by increasing the refrigerant flow rate flowing to the indoor heat exchanger 13, the intake pressure of the compressor 10 is further increased, and the whole cycle of the indoor heat exchanger 13 and the outdoor heat exchanger 11 is ensured. In the heating mode, when the discharge pressure is too large, that is, when the gas flow outputted from the compressor 10 flows to the accumulator 14 through the indoor heat exchanger 13, a large amount of liquid is stored in the accumulator 14, and the throttle 17 has an upper flow limit, the fourth valve body 2401 is opened to open the liquid before the throttle 17 to the outdoor heat exchanger 11, thereby averaging the pressure in the entire cycle system.

In this embodiment, the working part further includes a second pressure sensor 18, the second pressure sensor 18 is disposed at the air inlet 101 of the compressor 10 to detect the intake pressure of the compressor 10 in real time, and at the same time, the fourth valve body 2401 can adjust the opening degree of the fourth valve body 2401 according to the value detected by the second pressure sensor 18. An accumulator 14 is also provided between the outdoor heat exchanger 11 and the filter 16. In the cooling mode, when the second pressure sensor 18 detects that the intake pressure of the compressor 10 is less than 0.7MPa, the fourth valve body 2401 is opened, so that a part of the refrigerant directly flows to the indoor heat exchanger 13 through the fourth pipeline 240, thereby increasing the intake pressure of the compressor 10. During the heating mode, when the discharge pressure that first pressure sensor 1021 detected is greater than 3.8MPa, most refrigerants can be piled up in reservoir 14 because of the existence of choke valve 17, be unfavorable for the circulation of entire system, open fourth valve body 2401 this moment, extra a more pipeline flows to outdoor heat exchanger 11, can improve the flowing back ability of reservoir 14 through fourth valve body 2401 and fourth pipeline 240, under some extreme circumstances, break through the flow restriction of choke valve 17, and then adjust the pressure in the whole circulation, guarantee that air conditioning unit can normal operating under the operating mode of difference.

In this embodiment, the working components further include four check valves, namely, a first check valve 191, a second check valve 192, a third check valve 193, and a fourth check valve 194, and the switching between the cooling mode and the heating mode is completed according to the usage of the four directional valves 12, specifically, the first check valve 191 and the second check valve 192 are used in the cooling mode, and in the cooling mode, the flow paths in the whole system are: the compressor 10 outputs high-temperature and high-pressure gas, the high-temperature and high-pressure gas passes through an oil separation device to a first port of a four-way reversing valve 12, the high-temperature and high-pressure gas passes through a second port of the four-way reversing valve 12 and is reserved in an outdoor heat exchanger 11, refrigerant flows to a liquid storage device 14 through the first reversing valve 12, then to a filter 16 and a throttle valve 17, passes through a second one-way valve 192 and then flows to an indoor heat exchanger 13, the refrigerant is converted from liquid state to gas state in the indoor heat exchanger 13, phase change and heat absorption are carried out, the refrigerant meets the requirement of refrigeration, the refrigerant flows to a third port of the four-way reversing valve 12 through the indoor heat exchanger 13, flows to a gas-liquid separator through a fourth port of the four-way reversing valve 12, and finally flows back to the compressor 10, and therefore the whole cycle is formed. In the heating mode, the compressor 10 outputs high-temperature and high-pressure gas, the high-temperature and high-pressure gas passes through the first port of the reversing valve 12 through the oil separation device and flows to the indoor heat exchanger 13 through the third port of the reversing valve 12, the high-temperature and high-pressure gas is liquefied into liquid refrigerant in the indoor heat exchanger 13, the liquid refrigerant is subjected to phase change heat release to meet the heating requirement, the refrigerant flows to the liquid reservoir 14 through the third one-way valve 193, passes through the filter 16 and the throttle valve 17, flows to the outdoor heat exchanger 11 through the fourth one-way valve 194, and flows back to the gas-liquid separator and the compressor 10 through the second port and the fourth port of the reversing valve 12 in sequence. The requirements of users for refrigeration and heating are met through reasonable use of the one-way valve and the four-way reversing valve 12, and the control mode is simple, convenient and low in cost.

EXAMPLE seven

The utility model provides an air conditioning system, as shown in fig. 2, improve conventional air conditioning system, set up the bypass at outdoor heat exchanger 11's both ends, the bypass of condensation department promptly, both ends at compressor 10 set up the bypass, the bypass of exhaust department promptly, both ends at filter 16 and choke valve 17 set up the bypass, the bypass behind throttle reservoir 14 promptly, set up the bypass before throttle reservoir 14 and between the vapour and liquid separator, the bypass before throttle reservoir 14 promptly, increase the exhaust, the condensation, the bypass of throttle department, the assurance system can normal operating under the operating mode of difference.

The utility model provides a scheme that directly expands quick-witted year-round refrigeration, heats, concrete advantage is as follows:

in the embodiment, the bypass at the exhaust, condensation and throttling positions is added on the basis of the conventional system, so that the system can normally run under different working conditions, and the structure is simple.

The embodiment adopts the main circulation and the bypass circulation at the exhaust, condensation and throttling positions in principle, has simple control scheme and can ensure the operation of the system under different working conditions.

The utility model provides a low temperature refrigerating system pressure cross low with the high temperature heat down problem that system pressure is too high.

In the refrigeration mode, the exhaust pressure is less than 2.6MPa, and a bypass at a condensation position is opened; the exhaust pressure is less than 2.4MPa, and a bypass at the exhaust position is opened; the return air pressure is less than 0.7MPa, and a bypass is opened behind a throttling reservoir 14; the exhaust temperature is more than 90 ℃, and the bypass is opened in front of the reservoir 14 at the throttle.

In the heating mode, the exhaust pressure is greater than 3.8MPa, and a bypass is opened behind a throttling reservoir 14; the exhaust pressure is less than 2.4MPa, and a bypass at the exhaust position is opened; the exhaust temperature is more than 90 ℃, and the bypass is opened in front of the reservoir 14 at the throttle.

In the description of the present specification, the terms "connect", "mount", "fix", and the like are to be understood in a broad sense, for example, "connect" may be a fixed connection, a detachable connection, or an integral connection; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the description of the present specification, the terms "one embodiment," "some embodiments," "specific embodiments," and the like, 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.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A heat pump type air conditioning unit, comprising:

a refrigerant circulation circuit (100) including a compressor (10) and one or more working components connected to each other;

the pressure regulating pipeline (200) is connected in parallel to two sides of at least one working component;

the pressure regulating pipeline (200) is provided with a regulating valve (2001), and the regulating valve (2001) is used for controlling the opening and closing of the pressure regulating pipeline (200).

2. A heat pump type air conditioning unit according to claim 1,

a compressor (10) comprising an air inlet (101) and an air outlet (102);

the working part includes:

a directional valve (12), a first port of the directional valve (12) being connected to the gas outlet (102);

the first end of the outdoor heat exchanger (11) is connected with the second port of the reversing valve (12);

one end of the indoor heat exchanger (13) is connected with the other end of the outdoor heat exchanger (11), the other end of the indoor heat exchanger (13) is connected with a third port of the reversing valve (12), and a fourth port of the reversing valve (12) is communicated with the air inlet (101);

the pressure regulating circuit includes: a first pipe (210), one end of the first pipe (210) being connected between the second port and the outdoor heat exchanger (11), the other end of the first pipe (210) being connected between the outdoor heat exchanger (11) and the indoor heat exchanger (13);

the regulating valve (2001) comprises a first valve body (2101) arranged on the first pipeline (210), and the first valve body (2101) is used for controlling the opening and closing of the first pipeline (210).

3. A heat pump type air conditioning unit according to claim 2, characterized in that said pressure regulating circuit (200) further comprises:

a second pipe (220), wherein one end of the second pipe (220) is connected to the air inlet (101), and the other end of the second pipe (220) is connected to the air outlet (102);

the regulating valve (2001) comprises a second valve body (2201) arranged on the second pipeline (220), the second valve body (2201) is used for controlling the opening and closing of the second pipeline (220).

4. A heat pump type air conditioning unit according to claim 3, wherein said operating components further comprise:

a first pressure sensor (1021) arranged at the gas outlet (102) for detecting a discharge pressure value of the compressor (10);

the first valve body (2101) and the second valve body (2201) adjust the opening degree according to the exhaust pressure numerical value.

5. A heat pump type air conditioning unit according to claim 2, characterized in that said pressure regulating circuit (200) further comprises:

a third pipe (230), one end of the third pipe (230) being connected between the outdoor heat exchanger (11) and the indoor heat exchanger (13), and the other end being connected to the air inlet (101);

the regulating valve (2001) comprises a third valve body (2301) arranged on a third line (230), the third valve body (2301) being used for controlling the opening and closing of the third line (230).

6. A heat pump air conditioning unit according to claim 5, wherein said operational components further comprise:

an accumulator (14), an inlet of the accumulator (14) being connected to the outdoor heat exchanger (11), an outlet of the accumulator (14) being connected to the indoor heat exchanger (13);

one end of the third pipeline (230) is connected to the liquid inlet of the liquid storage device (14), and the other end of the third pipeline is connected to the air inlet (101).

7. A heat pump air conditioning unit according to claim 5, wherein said operational components further comprise:

a temperature sensor (15), said temperature sensor (15) being disposed between said air outlet (102) and said outdoor heat exchanger (11) for detecting a discharge temperature of said compressor (10);

the third valve body (2301) adjusts the opening degree according to the exhaust temperature.

8. A heat pump type air conditioning unit according to any one of claims 2 to 7, wherein said operating means further comprises:

a filter (16), the filter (16) being connected between the outdoor heat exchanger (11) and the indoor heat exchanger (13);

a throttle valve (17), the throttle valve (17) being disposed between the filter (16) and the indoor heat exchanger (13);

the pressure regulating circuit (200) further comprises:

a fourth pipe (240), one end of the fourth pipe (240) being connected between the filter (16) and the outdoor heat exchanger (11), and the other end being connected between the indoor heat exchanger (13) and the throttle valve (17);

the regulator valve (2001) includes a fourth valve body (2401) provided on a fourth line (240), the fourth valve body (2401) being used to control opening and closing of the fourth line (240).

9. A heat pump type air conditioning unit according to claim 8, wherein said operating components further comprise:

the second pressure sensor (18), the second pressure sensor (18) is arranged at the air inlet of the compressor (10) and is used for detecting the air inlet pressure value of the compressor (10);

the fourth valve body (2401) adjusts the opening according to the numerical value of the air inlet pressure of the compressor (10).

10. A heat pump type air conditioning unit according to any one of claims 2 to 7, wherein said operating means further comprises:

a first check valve (191) disposed between the outdoor heat exchanger (11) and the accumulator (14) for communicating the outdoor heat exchanger (11) with the accumulator (14) in a cooling mode;

a second check valve (192) provided between the accumulator (14) and the indoor heat exchanger (13) for communicating the accumulator (14) with the indoor heat exchanger (13) in a cooling mode;

a third check valve (193) disposed between the accumulator (14) and the outdoor heat exchanger (11) for communicating the accumulator (14) with the outdoor heat exchanger (11) in the heating mode;

and the fourth check valve (194) is arranged between the indoor heat exchanger (13) and the outdoor heat exchanger (11) and is used for communicating the indoor heat exchanger (13) with the outdoor heat exchanger (11) in the heating mode.