阅读说明：本技术 一种空调热泵系统 (Air conditioner heat pump system ) 是由 谢吉培 张洪亮 赵雷 李林 徐志强 于 2019-01-14 设计创作，主要内容包括：本发明属于空调技术领域,公开一种空调热泵系统,包括压缩机、室内换热器、室外换热器、四通阀和气液分离器,还包括第一节流装置、储液器、第一电磁阀、第一过滤器、膨胀阀和第二过滤器,其中所述的压缩机为大涡旋式压缩机。本发明提供的空调热泵系统中的压缩机控制简单,占地面积小,噪音低,且,采用旁路除霜方法,提高了除霜速度。(The invention belongs to the technical field of air conditioners, and discloses an air-conditioning heat pump system which comprises a compressor, an indoor heat exchanger, an outdoor heat exchanger, a four-way valve, a gas-liquid separator, a first throttling device, a liquid storage device, a first electromagnetic valve, a first filter, an expansion valve and a second filter, wherein the compressor is a large-vortex compressor. The compressor in the air-conditioning heat pump system provided by the invention is simple to control, small in floor area and low in noise, and the defrosting speed is increased by adopting a bypass defrosting method.)

1. The utility model provides an air conditioner heat pump system, includes compressor, indoor heat exchanger, outdoor heat exchanger, cross valve and vapour and liquid separator, its characterized in that still includes:

a first throttling device, a liquid storage device, a first electromagnetic valve, a first filter, an expansion valve and a second filter,

wherein the compressor is a large scroll compressor.

2. An air conditioning heat pump system as recited in claim 1 further comprising: a second electromagnetic valve is arranged on the second side of the electromagnetic valve,

wherein the reservoir and the first throttling device are arranged on a first flow path of the air-conditioning heat pump system,

the first filter, the expansion valve and the second filter are arranged on a second flow path of the air-conditioning heat pump system,

the second electromagnetic valve is arranged on a third flow path of the air-conditioning heat pump system,

the first flow path is connected in series with the second flow path through the first solenoid valve, the first flow path is connected in series with the third flow path, and the third flow path is connected in parallel with the second flow path.

3. An air conditioning heat pump system as recited in claim 1 further comprising:

the second throttling device, the differential pressure bypass solenoid valve and the four-way valve form a loop.

4. An air conditioning heat pump system as recited in claim 1 further comprising:

a one-way valve for controlling the reservoir.

5. An air conditioning heat pump system as claimed in claim 1, wherein the outdoor heat exchanger is a finned heat exchanger.

6. An air conditioning heat pump system as claimed in claim 1, wherein the water side heat exchanger is a shell and tube heat exchanger.

7. An air conditioning heat pump system according to any one of claims 1 to 6, wherein the number of the compressors is one or more.

8. An air conditioning heat pump system as claimed in any one of claims 1 to 6, wherein the air conditioning heat pump system comprises:

a water side heat exchanger, and, two or more first units,

the first unit comprises a compressor, a four-way valve, an outdoor heat exchanger, a liquid storage device, a gas-liquid separator, a first throttling device, a first electromagnetic valve, a first filter, an expansion valve and a second filter.

Technical Field

The invention relates to the technical field of air conditioners, in particular to an air conditioner heat pump system.

Background

The existing air-conditioning heat pump systems are various, such as an air-cooled modular heat pump system, an air-cooled screw heat pump system and the like. The air cooling module heat pump system mainly adopts the small scroll compressors, the compression capacity of a single small scroll compressor is small, only users with small load requirements can be met, and for users with large load requirements, the multi-stage small scroll compressors are generally required to be combined for use, so that a combined system with higher capacity is obtained. However, when the multi-stage small scroll compressor is used in combination, the defects of complicated control process, large occupied area, complex pipeline connection and the like exist; in the air-cooled screw heat pump system, the demand of ability can be satisfied to single screw compressor, however, screw compressor is higher to operational environment's requirement, and the noise is bigger than normal when the compressor operates, consequently can't use in crowd intensive place, need install in the place far away from the crowd, perhaps if do not want when letting noise influence people's normal sense of hearing, need build the noise that gives sound insulation the better room of effect in order to reduce screw unit, and the cost is higher. And when the screw compressor is used, the lowest environmental temperature is not lower than-10 ℃, and when the environmental temperature is lower than-10 ℃, the running efficiency and the running reliability of the unit are poor.

Disclosure of Invention

The embodiment of the invention provides an air-conditioning heat pump system, which aims to solve the technical problems of complicated control process, large occupied area and complex pipeline connection of a multistage small scroll compressor. The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview and is intended to neither identify key/critical elements nor delineate the scope of such embodiments. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is presented later.

According to a first aspect of embodiments of the present invention, there is provided an air conditioning heat pump system, including a compressor, an indoor heat exchanger, an outdoor heat exchanger, a four-way valve, and a gas-liquid separator, further including: the compressor comprises a first throttling device, a liquid storage device, a first electromagnetic valve, a first filter, an expansion valve and a second filter, wherein the compressor is a large-vortex compressor.

In some optional embodiments, the air-conditioning heat pump system further comprises a second solenoid valve, wherein the reservoir and the first throttling device are disposed in a first flow path of the air-conditioning heat pump system, the first filter, the expansion valve and the second filter are disposed in a second flow path of the air-conditioning heat pump system, the second solenoid valve is disposed in a third flow path of the air-conditioning heat pump system, the first flow path is connected in series with the second flow path through the first solenoid valve, the first flow path is connected in series with the third flow path, and the third flow path is connected in parallel with the second flow path.

In some optional embodiments, the air-conditioning heat pump system further comprises a second throttling device and a pressure difference bypass solenoid valve, and the second throttling device and the pressure difference bypass solenoid valve form a loop with the four-way valve.

In some optional embodiments, the air-conditioning heat pump system further comprises a one-way valve for controlling the reservoir.

In some optional embodiments, in the air-conditioning heat pump system, the outdoor heat exchanger is a fin-type heat exchanger.

In some optional embodiments, in the air-conditioning heat pump system, the water-side heat exchanger is a shell-and-tube heat exchanger.

In some optional embodiments, in the air-conditioning heat pump system, the number of the compressors is one or more.

In some optional embodiments, in the air-conditioning heat pump system, the air-conditioning heat pump system comprises an indoor heat exchanger, and two or more first units, wherein the first units comprise a compressor, a four-way valve, an outdoor heat exchanger, a reservoir, a gas-liquid separator, a first throttling device, a first solenoid valve, a first filter, an expansion valve and a second filter.

The technical scheme provided by the embodiment of the invention has the following beneficial effects:

the compressor in the air-conditioning heat pump system provided by the invention is a large scroll compressor, can meet the requirement of a user on a high temperature regulating effect, is simple in control process, small in occupied area, easy to perform pipeline connection and can replace a multi-stage small scroll compressor. Meanwhile, compared with a screw compressor, the large scroll compressor has low noise during operation, can be used in places with dense crowds, and enlarges the application range.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.

Figure 1 is a schematic diagram illustrating the construction of an air conditioning heat pump system according to an exemplary embodiment,

figure 2 is a schematic diagram illustrating the construction of an air conditioning heat pump system according to another exemplary embodiment,

fig. 3 is a schematic diagram illustrating a structure of an air conditioning heat pump system according to another exemplary embodiment.

1 compressor, 2 four-way valve, 3 outdoor heat exchanger, 4 blower, 51 first filter, 52 second filter, 6 expansion valve, 7 second solenoid valve, 8 first solenoid valve (reservoir solenoid valve), 9 check valve, 10 reservoir, 11 water side heat exchanger, 12 gas-liquid separator, 13 differential pressure bypass solenoid valve, 141 first throttling gear, 142 second throttling gear.

Detailed Description

The following description and the drawings sufficiently illustrate specific embodiments herein to enable those skilled in the art to practice them. Portions and features of some embodiments may be included in or substituted for those of others. The scope of the embodiments herein includes the full ambit of the claims, as well as all available equivalents of the claims. The terms "first," "second," and the like, herein are used solely to distinguish one element from another without requiring or implying any actual such relationship or order between such elements. In practice, a first element can also be referred to as a second element, and vice versa. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a structure, apparatus, or device that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such structure, apparatus, or device. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a structure, device or apparatus that comprises the element. The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like herein, as used herein, are defined as orientations or positional relationships based on the orientation or positional relationship shown in the drawings, and are used for convenience in describing and simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention. In the description herein, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may include, for example, mechanical or electrical connections, communications between two elements, direct connections, and indirect connections via intermediary media, where the specific meaning of the terms is understood by those skilled in the art as appropriate.

Herein, the term "plurality" means two or more, unless otherwise specified.

Herein, the character "/" indicates that the preceding and following objects are in an "or" relationship. For example, A/B represents: a or B.

Herein, the term "and/or" is an associative relationship describing objects, meaning that three relationships may exist. For example, a and/or B, represents: a or B, or A and B.

An embodiment of the present invention provides an air-conditioning heat pump system, as shown in fig. 1, including a compressor 1, an indoor heat exchanger 11, an outdoor heat exchanger 3, a four-way valve 2, and a gas-liquid separator 12, and further including a first throttling device 141, a reservoir 10, a first solenoid valve 8, a first filter 51, an expansion valve 6, and a second filter 52, where the compressor is a large scroll compressor.

The air-conditioning heat pump system provided by the embodiment of the invention is characterized in that a compressor 1, an indoor heat exchanger 11, an outdoor heat exchanger 3 and a four-way valve 2 are communicated through pipelines to form a refrigerant circulation loop, and the air-conditioning heat pump system also comprises a gas-liquid separator 12 which prevents liquid refrigerant from flowing into the compressor 1 to influence the normal work of the compressor 1, wherein the compressor is a large scroll compressor, can replace a multi-stage small scroll compressor, is simple to use and control, occupies a small area, and is easy to connect the pipelines. Meanwhile, the operation noise is low, and the device can be used in places with dense crowds. Preferably, the large scroll compressor may be 25P, 30P or 40P.

The air-conditioning heat pump system provided by the embodiment of the invention further comprises a first electromagnetic valve 8, wherein the reservoir 10 and the first throttling device 141 are arranged in a first flow path of the air-conditioning heat pump system, the first filter 51, the expansion valve 6 and the second filter 52 are arranged in a second flow path of the air-conditioning heat pump system, the second electromagnetic valve 7 is arranged in a third flow path of the air-conditioning heat pump system, the first flow path is connected with the second flow path in series through the first electromagnetic valve 8, the first flow path is connected with the third flow path in series, and the third flow path is connected with the second flow path in parallel.

The communication mode of the components of the air-conditioning heat pump system provided by the embodiment of the invention can be as follows: the first throttling device 141, the reservoir 10, the first solenoid valve 8, the first filter 51, the expansion valve 6, and the second filter 52 are sequentially communicated, and the first throttling device 141 is directly communicated with the water side heat exchanger 11, and the second filter 52 is directly communicated with the outdoor heat exchanger 3. The communication mode of the second electromagnetic valve 7 and the above components can be as follows: the first throttling device 141, the reservoir 10 and the second electromagnetic valve 7 are sequentially communicated, and the second electromagnetic valve 7 is directly communicated with the outdoor heat exchanger 3. The first filter 51 may also be in direct communication with the water side heat exchanger 11 via a length of tubing.

The air-conditioning heat pump system provided by the embodiment of the invention comprises the second electromagnetic valve 7 connected with the first flow path in series, the flow path of a refrigerant can be changed by controlling the opening or closing of the second electromagnetic valve 7, particularly the flow path of the refrigerant in the liquid reservoir 10 is changed, and further the air-conditioning heat pump system is controlled to carry out different working states such as refrigeration, heating or defrosting by controlling the opening or closing of the first electromagnetic valve 8 and the second electromagnetic valve 7. For example, by-pass defrosting can be performed by controlling the opening or closing of the first solenoid valve 8 and the second solenoid valve 7, and specifically, the defrosting method includes: and closing the first electromagnetic valve 8, opening the second electromagnetic valve 7, enabling the refrigerant in the liquid accumulator 10 to flow out, entering a defrosting bypass consisting of the second electromagnetic valve 7, the liquid accumulator 10 and the first throttling device 141, and after the refrigerant absorbs heat through the indoor heat exchanger 11, transmitting the heat to the outdoor heat exchanger 3 through the defrosting bypass to finish defrosting. In the bypass defrosting process, the second electromagnetic valve 7 is opened, the first electromagnetic valve 8 is closed, the refrigerant stored in the liquid storage device 10 flows out, the problem that the refrigerant is insufficient due to the low-pressure and high-pressure difference when the four-way valve 2 is reversed is solved, the refrigerant circulation amount in the defrosting process is increased, the heat exchange efficiency is improved, the frost accommodating speed of the outdoor heat exchanger 3 is increased, and the defrosting time is shortened.

The air-conditioning heat pump system provided by the embodiment of the invention further comprises a defrosting sensor, and the bypass defrosting flow path is automatically controlled according to a signal of the defrosting sensor.

The air-conditioning heat pump system provided by the embodiment of the invention further comprises a second throttling device 142 and a pressure difference bypass solenoid valve 13. The second throttling device 142 and the differential pressure bypass solenoid valve 13 form a loop with the four-way valve 2, and are disposed between the four-way valve 2 and the gas-liquid separator 12.

When the air-conditioning heat pump system operates under the working conditions of low ring temperature, high water temperature or high pressure ratio, and the exhaust temperature is higher than a set value or the suction pressure is lower than a set value, the second throttling device 142 and the differential pressure bypass electromagnetic valve 13 are opened, and the high-pressure side refrigerant returns to the four-way valve 2 after being throttled by the second throttling device 142 and directly returns to the compressor 1 through the gas-liquid separator 12. The flow path formed by the second throttling device 142 and the differential pressure bypass solenoid valve 13 can reduce the exhaust temperature or increase the low-pressure side refrigerant air supplement amount, increase the low-pressure, and close the high-low pressure bypass solenoid valve 13 when the exhaust temperature is lower than a set value or the suction pressure is higher than a set value. The risk of exhaust temperature protection and low-pressure protection is reduced, and the reliability of the heat pump system is further improved.

Specifically, the method for performing high-low pressure bypass regulation by using the second throttling device 142 and the differential pressure bypass solenoid valve 13 provided by the embodiment of the invention includes: detecting the discharge temperature T1 of the compressor 1; the detected discharge temperature T1 of the compressor 1 is compared with a preset maximum value Tmax of the discharge temperature, and if the discharge temperature T1 of the compressor 1 is greater than the preset maximum value Tmax of the discharge temperature, the differential pressure bypass solenoid valve 13 and the second throttling device 142 are opened, and the high-pressure side refrigerant is throttled and then directly returned to the compressor 1 through the gas-liquid separator 12, so as to be used for reducing the discharge temperature of the compressor.

The method for performing high-low pressure bypass regulation by using the second throttling device 142 and the differential pressure bypass solenoid valve 13 provided by the embodiment of the invention may further include detecting a suction pressure P1 of the compressor 1; comparing the detected suction pressure P1 of the compressor 1 with the preset maximum value Pmax of the suction pressure, and if the suction pressure P1 of the compressor 1 is smaller than the preset maximum value Pmax of the suction pressure, opening the differential pressure bypass electromagnetic valve 13 and the second throttling device 142, so that the high-pressure side refrigerant directly returns to the compressor 1 through the gas-liquid separator 12 after throttling, and is used for increasing the air supplement amount of the low-pressure side refrigerant and increasing the low-pressure.

The air-conditioning heat pump system provided by the embodiment of the invention further comprises a one-way valve 9 for controlling the liquid storage tank 10.

Controlling the flow direction of the refrigerant in the accumulator 10 through the check valve 9 and the first and second electromagnetic valves 8 and 7, for example, when defrosting is required, opening the check valve 9 and the second electromagnetic valve 7, closing the first electromagnetic valve 8, and allowing the refrigerant in the accumulator 10 to flow out and enter a defrosting bypass flow path for bypass defrosting; when refrigeration is needed, the check valve 9 and the first electromagnetic valve 8 are opened, the second electromagnetic valve 7 is closed, and the refrigerant in the liquid storage device 10 flows out to refrigerate.

The embodiment of the present invention does not specifically limit the types of the water side heat exchanger 11 and the outdoor heat exchanger 3. Preferably, the water-side heat exchanger 11 is a shell-and-tube heat exchanger, such as a fixed-tube plate heat exchanger, a floating-head heat exchanger, a U-shaped tube heat exchanger, a vortex hot-die heat exchanger, and the like; preferably, the outdoor heat exchanger 3 is a fin type heat exchanger.

The embodiment of the present invention does not specifically limit the type of the gas-liquid separator 12, and can be used to prevent the liquid refrigerant from flowing into the compressor 1 and affecting the normal operation of the compressor 1. For example, the aforementioned gas-liquid separator may be a flash tank.

The refrigeration method of the air-conditioning heat pump system provided by the embodiment of the invention comprises the following steps: the first electromagnetic valve 8 is opened, the second electromagnetic valve 7 is opened, so that the refrigerant in the liquid storage device 10 flows out, the flow rate of the refrigerant in the refrigeration process is increased, at the moment, the liquid storage device 10 serves as an empty tank and does not store the refrigerant, and meanwhile, when the refrigerant with large flow rate flows through, the liquid storage device 10 can serve as a buffer to ensure that the impulse of the refrigerant in the refrigeration process is minimum. Specifically, in the refrigeration process, the refrigerant sequentially passes through the compressor 1, the four-way valve 2, the outdoor heat exchanger 3, the second filter 52, the expansion valve 6, the first filter 51, the indoor heat exchanger 11, the four-way valve 2, and the gas-liquid separator 12, and returns to the compressor 1, thereby completing a refrigeration cycle.

The heating method of the air-conditioning heat pump system provided by the embodiment of the invention comprises the following steps: and closing the first electromagnetic valve 8 and the second electromagnetic valve 7 simultaneously to prevent the refrigerant in the liquid reservoir 10 from flowing out, reduce the amount of the refrigerant in the heating process, and avoid the influence on heat exchange of the heat pump system caused by the refrigerant existing in the indoor heat exchanger during heating. Specifically, in the heating process, the refrigerant sequentially passes through the compressor 1, the four-way valve 2, the indoor heat exchanger 11, the first filter 51, the expansion valve 6, the second filter 52, the outdoor heat exchanger 3, the four-way valve 2, and the gas-liquid separator 12, and returns to the compressor 1, thereby completing a heating cycle.

It should be noted that the number of the compressors 1 is not particularly limited in the embodiment of the present invention. Specifically, the number of the compressors can be one or more according to actual requirements. For example, the number of compressors may be two, as shown in fig. 2, including a first large scroll compressor 11 and a second large scroll compressor 12.

A unit consisting of the compressor 1, the four-way valve 2, the outdoor heat exchanger 3, the accumulator 10, the gas-liquid separator 12, the first throttle 141, the first solenoid valve 8, the first filter 51, the expansion valve 6, and the second filter 52 is defined as a first unit. Further, in order to improve the heat exchange effect of a single water-side heat exchanger 11, for example, the cooling effect of the water-side heat exchanger under the condition of higher ambient temperature, or the heating effect of the water-side heat exchanger under the condition of lower ambient temperature, the air-conditioning heat pump system provided by the embodiment of the invention may include one water-side heat exchanger 11, and two or more first units. The plurality of first units further ensure the heat exchange capacity of the air-conditioning heat pump system in the embodiment of the invention, and further improve the heating effect or the refrigerating effect of the air-conditioning heat pump system in the low-temperature environment or the high-temperature environment. For example, the number of the first units may be two, and as shown in fig. 3, the first units further include a blower 4, a second solenoid valve 7, a check valve 9 of the accumulator 10, a differential pressure bypass solenoid valve 13, and/or a second throttling device 142.

The present invention is not limited to the structures that have been described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.