CN221098929U - Refrigerant state detection device and heat pump system - Google Patents
Refrigerant state detection device and heat pump system Download PDFInfo
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- CN221098929U CN221098929U CN202322603733.1U CN202322603733U CN221098929U CN 221098929 U CN221098929 U CN 221098929U CN 202322603733 U CN202322603733 U CN 202322603733U CN 221098929 U CN221098929 U CN 221098929U
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- 239000003507 refrigerant Substances 0.000 title claims abstract description 93
- 238000001514 detection method Methods 0.000 title claims abstract description 63
- 230000003068 static effect Effects 0.000 claims abstract description 47
- 238000007789 sealing Methods 0.000 claims abstract description 36
- 230000002706 hydrostatic effect Effects 0.000 claims description 10
- 230000007704 transition Effects 0.000 claims description 9
- 239000007788 liquid Substances 0.000 description 5
- 239000012535 impurity Substances 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 238000009530 blood pressure measurement Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000001603 reducing effect Effects 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 239000011231 conductive filler Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000004781 supercooling Methods 0.000 description 1
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Abstract
The utility model relates to the technical field of air conditioners, and provides a refrigerant state detection device and a heat pump system, wherein the refrigerant state detection device comprises a sealing cylinder and a pressure detection element, a static pressure cavity is arranged in the sealing cylinder, and an inlet and an outlet which are communicated with the static pressure cavity and the outside of the sealing cylinder are formed in the cylinder wall of the sealing cylinder; the pressure detection element is connected to the cylinder wall, and the detection end is located one side of the cylinder wall facing the static pressure cavity. The refrigerant state detection device is arranged on a refrigerant pipeline of the refrigerant circulation loop, a refrigerant flowing at a high speed flows into the static pressure cavity along the inlet, the flow speed of the refrigerant flowing at the high speed is reduced after the static pressure cavity and the refrigerant pipeline are kept smooth, the dynamic pressure of the refrigerant is reduced, the pressure fluctuation is stable, the interference to the detection end is small, and therefore the pressure detection result is more accurate, and the high-efficiency operation of the heat pump system can be controlled.
Description
Technical Field
The utility model relates to the technical field of air conditioners, in particular to a refrigerant state detection device and a heat pump system.
Background
In the automatic control system of the current heat pump unit, pressure data in a refrigerant circulation loop are derived from a high pressure sensor and a low pressure sensor, condensing pressure and evaporating pressure are simulated through pressure data obtained by the high pressure sensor and the low pressure sensor, then condensing temperature and evaporating temperature are calculated through an embedded program, supercooling superheat degree is calculated through temperatures detected by an air suction temperature sensor and an air discharge temperature sensor, so that the number of opening and closing steps of an electronic expansion valve is controlled, air suction drying is guaranteed, and condensate is supersaturated liquid. In the related art, the pressure sensor is directly installed on the pipe wall, the flow velocity of the gaseous refrigerant in the pipeline is too fast, and the dynamic pressure is too large, so that the pressure measurement is inaccurate, and the gas entering the compressor possibly contains liquid refrigerant, so that the exhaust temperature of the compressor is reduced, the energy consumption is higher, and the efficient operation of the heat pump system is difficult to control.
Disclosure of utility model
The present utility model is directed to solving at least one of the technical problems existing in the related art. Therefore, the utility model provides the refrigerant state detection device, the static pressure cavity is arranged in the sealing cylinder, the inlet and the outlet of the sealing cylinder are communicated with the pipeline of the refrigerant circulation loop, the flow speed is reduced when the refrigerant flows through the static pressure cavity with larger volume, the pressure fluctuation is rapidly reduced, and the interference to the detection end is smaller, so that the detection result is more accurate, and the high-efficiency operation of the heat pump system can be controlled.
The utility model also provides a heat pump system.
According to an embodiment of the present utility model, a refrigerant state detection device includes:
The sealing cylinder is provided with a static pressure cavity, and the cylinder wall of the sealing cylinder is provided with an inlet and an outlet which are communicated with the static pressure cavity and the outside of the sealing cylinder;
The pressure detection element is provided with a detection end, and is connected to the cylinder wall, and the detection end is positioned on one side of the cylinder wall facing the static pressure cavity.
According to one embodiment of the utility model, the static pressure chamber further comprises a temperature detection element with a temperature sensing end, wherein the temperature detection element is connected to the cylinder wall, and the side wall of the temperature sensing end is positioned in the static pressure chamber.
According to one embodiment of the utility model, the temperature detection blind pipe is sleeved on the outer side of the temperature sensing end, and a heat conduction filling piece is arranged between the temperature sensing end and the inner wall of the temperature detection blind pipe.
According to one embodiment of the utility model, one end of the temperature detection blind pipe is connected to the cylinder wall.
According to one embodiment of the utility model, the length of the temperature-sensing end extends at least to the centre of the hydrostatic cavity.
According to one embodiment of the utility model, the sealing cylinder comprises a straight cylinder section and arc transition sections positioned at two ends of the straight cylinder section, the inlet and the outlet are arranged at the arc transition sections at two ends in one-to-one correspondence, and the pressure detection element is positioned at the straight cylinder section.
According to one embodiment of the utility model, a filter element is disposed within the hydrostatic chamber, the filter element being located between the inlet and the outlet.
According to one embodiment of the utility model, a porous pipe is arranged in the static pressure cavity, and the porous pipe is connected with the cylinder wall and sleeved outside the detection end.
According to a second aspect of the present utility model, a heat pump system includes a refrigerant state detection device according to an embodiment of the first aspect of the present utility model.
According to one embodiment of the present utility model, the number of the refrigerant state detecting devices is two, one of the two sets is used for detecting the discharge pressure of the compressor, and the other set is used for detecting the suction pressure of the compressor.
The above technical solutions in the present utility model have at least one of the following technical effects:
The refrigerant state detection device provided by the embodiment of the utility model comprises a sealing cylinder and a pressure detection element, wherein a static pressure cavity is arranged in the sealing cylinder, and an inlet and an outlet which are communicated with the static pressure cavity and the outside of the sealing cylinder are formed in the cylinder wall of the sealing cylinder; the pressure detection element is connected to the cylinder wall, and the detection end is located one side of the cylinder wall facing the static pressure cavity. The refrigerant state detection device is arranged on a refrigerant pipeline of the refrigerant circulation loop, the cross-sectional area of the sealing cylinder is larger than that of the refrigerant pipeline, the refrigerant flowing at high speed flows into the sealing cylinder along the inlet, the static pressure cavity and the refrigerant pipeline are kept smooth, the flow speed of the refrigerant flowing at high speed is reduced after the refrigerant enters the static pressure cavity, the dynamic pressure of the refrigerant is rapidly reduced, the pressure fluctuation is relatively stable, the interference to the detection end is relatively small, and therefore the detection result is relatively accurate, and the high-efficiency operation of the heat pump system can be controlled.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the related art, the drawings that are required to be used in the embodiments or the related technical descriptions will be briefly described, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the drawings without inventive effort for those skilled in the art.
Fig. 1 is a schematic structural diagram of a refrigerant state detecting device provided by an embodiment of the present utility model;
fig. 2 is a schematic structural diagram of a heat pump system according to an embodiment of the present utility model.
Reference numerals:
100. A refrigerant state detection device; 10. a sealing cylinder; 11. a static pressure cavity; 101. an inlet; 102. an outlet; 111. a straight barrel section; 112. an arc-shaped transition section; 12. a pressure detecting element; 13. a temperature detecting element; 131. a temperature sensing end; 132. a temperature detection blind pipe; 133. a thermally conductive filler; 14. a filter element.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be clearly described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, based on the embodiments of the utility model, which would be apparent to one of ordinary skill in the art without making any inventive effort are intended to be within the scope of the utility model.
In the description of the embodiments of the present utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the embodiments of the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In describing embodiments of the present utility model, it should be noted that, unless explicitly stated and limited otherwise, the terms "coupled," "coupled," and "connected" should be construed broadly, and may be either a fixed connection, a removable connection, or an integral connection, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in embodiments of the present utility model will be understood in detail by those of ordinary skill in the art.
In embodiments of the utility model, unless expressly specified and limited otherwise, a first feature "up" or "down" on a second feature may be that the first and second features are in direct contact, or that the first and second features are in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the embodiments of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed 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. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
In the related art, the pressure sensor is directly installed on the pipe wall, the flow velocity of the gaseous refrigerant in the pipeline is too fast, and the dynamic pressure is too large, so that the pressure measurement is inaccurate, and the gas entering the compressor possibly contains liquid refrigerant, so that the exhaust temperature of the compressor is reduced, the energy consumption is higher, and the efficient operation of the heat pump system is difficult to control.
Referring to fig. 1, a refrigerant state detecting device according to an embodiment of the present utility model includes a seal cartridge 10 and a pressure detecting element 12.
The sealing cylinder 10 is of a cylindrical, elliptic or other cylindrical structure, a static pressure cavity 11 is arranged in the sealing cylinder, an inlet 101 and an outlet 102 are formed in the cylinder wall of the sealing cylinder 10, and the inlet 101 and the outlet 102 are communicated with the static pressure cavity 11 and the outside of the sealing cylinder 10. The seal cartridge 10 is connected to a refrigerant line of the refrigerant circulation circuit through an inlet 101 and an outlet 102, and refrigerant from upstream flows into the static pressure chamber 11 along the inlet 101 and then flows out of the static pressure chamber 11 along the outlet 102.
The pressure detecting element 12 is connected to the wall of the sealed cylinder 10, and the pressure detecting element 12 has a detecting end, and the detecting end is located on a side of the wall facing the hydrostatic cavity 11, i.e. the detecting end directly contacts the gaseous or liquid refrigerant in the hydrostatic cavity 11.
According to the refrigerant state detection device 100 provided by the embodiment of the utility model, the cross-sectional area of the sealing cylinder 10 is larger than that of the refrigerant pipeline, the refrigerant flowing at high speed flows into the static pressure cavity 11 along the inlet 101, the static pressure cavity 11 and the refrigerant pipeline keep smooth, the flow speed of the refrigerant flowing at high speed is reduced after the refrigerant enters the static pressure cavity 11, the dynamic pressure of the refrigerant is rapidly reduced, the pressure fluctuation is stable, the interference to the detection end is small, the pressure detection result is more accurate, and the efficient operation of the heat pump system can be controlled.
In some embodiments, the ratio of the cross-sectional area of the seal cartridge 10 to the cross-sectional area of the refrigerant line is directly related to the refrigerant flow rate upstream of the inlet 101. For example, when the flow rate of the refrigerant is higher, the ratio of the cross-sectional area of the sealing cylinder 10 to the cross-sectional area of the refrigerant pipeline is higher, and at this time, the speed reducing effect is more obvious after the refrigerant enters the static pressure cavity 11, and the dynamic pressure is reduced more greatly, so that the size and the model of the sealing cylinder 10 can be selected accordingly.
In some embodiments, the ratio of the cross-sectional area of the seal cartridge 10 to the cross-sectional area of the refrigerant line is a predetermined ratio, which is 3 to 5 or more.
In some embodiments, the refrigerant state detecting element further includes a temperature detecting element 13 having a temperature sensing end 131, the temperature detecting element 13 is connected to the wall of the sealed cylinder 10, the entire side wall of the temperature sensing end 131 is located in the static pressure cavity 11, and the side wall of the temperature sensing end 131 is surrounded by the refrigerant in the static pressure cavity 11.
Referring to fig. 1, the temperature sensing end 131 of the temperature detecting element 13 extends into the static pressure chamber 11, and when the temperature sensing end 131 detects the temperature of the refrigerant, the temperature sensing end 131 is not in line contact with the outer sidewall of the refrigerant pipe any more, but the contact area between the temperature sensing end 131 and the refrigerant is increased, so that the accuracy of temperature measurement is improved.
In some embodiments, a temperature detection blind pipe 132 is sleeved outside the temperature sensing end 131, and a heat conduction filling member 133 is disposed between the temperature sensing end 131 and the inner wall of the temperature detection blind pipe 132.
Referring to fig. 1, the temperature detecting blind pipe 132 is a straight pipe with one end closed, a cavity is formed in the temperature detecting blind pipe 132, the temperature sensing end 131 is disposed in the cavity, the temperature detecting blind pipe 132 can avoid the temperature sensing end 131 from directly contacting the flowing refrigerant, and damage to the temperature detecting element 13 is reduced. In order to improve the sensitivity of temperature detection, a heat-conducting filler 133 is disposed between the temperature sensing end 131 and the inner wall of the temperature detecting blind pipe 132, and the heat-conducting filler 133 may be heat-conducting silicone grease or the like.
According to one embodiment of the present utility model, one end of temperature sensing blind tube 132 is attached to the wall of the tube. Referring to fig. 1, one end of the temperature detecting blind pipe 132 is fixedly connected to the inner wall of the sealing cylinder 10, so that the temperature detecting blind pipe 132 and the temperature sensing end 131 can be prevented from swinging under the action of the refrigerant, the stability of the structure is improved, and damage is avoided. Meanwhile, one end of the temperature detection blind pipe 132 far away from the cylinder wall is in a circular arc structure, and the circular arc structure reduces resistance when the refrigerant flows, so that abrasion of the temperature detection blind pipe 132 is slowed down, and pressure loss of the refrigerant is reduced.
In some embodiments, the length of the temperature-sensing end 131 extends at least to the center of the hydrostatic chamber 11. Referring to fig. 1, the temperature sensing end 131 and the temperature detecting blind pipe 132 extend from one side of the cylinder wall to the center of the static pressure chamber 11, and a part of liquid refrigerant and a part of gaseous refrigerant may exist in the static pressure chamber 11, so that the temperature sensing end 131 is disposed at the center of the static pressure chamber 11 to help to obtain the real temperature in the static pressure chamber 11.
In some embodiments, the sealing cylinder 10 includes a straight cylinder section 111 and arc transition sections 112 located at two ends of the straight cylinder section 111, that is, the straight cylinder section 111 is a cylindrical structure with two open ends, one arc transition section 112 is disposed at the opening of two ends in a one-to-one correspondence manner, the inlet 101 and the outlet 102 are disposed at the arc transition sections 112 of two ends in a one-to-one correspondence manner, and the pressure detecting element 12 is located at the straight cylinder section 111.
Referring to fig. 1, the arc-shaped transition section 112 may have an arc-shaped structure or a hemispherical structure, so that the refrigerant from the inlet 101 enters the static pressure chamber 11 in a low resistance state and flows out along the outlet 102 in a low resistance state, thereby reducing the pressure loss when the refrigerant flows through the static pressure chamber 11. The pressure detecting element 12 is arranged on the straight cylinder section 111, at this time, the state of the refrigerant is stable, the pressure fluctuation is small, and the detection result is real.
According to one embodiment of the utility model, a filter element 14 is disposed within hydrostatic chamber 11, filter element 14 being located between inlet 101 and outlet 102.
Referring to fig. 1, a filter 14 is disposed in the static pressure chamber 11, and the filter 14 can adsorb and filter impurities in the circulating refrigerant, so as to avoid adverse effects of impurities on the refrigerant circulation loop and unnecessary abrasion of the compressor due to the existence of impurities during work.
In some embodiments, a porous tube is disposed in the hydrostatic chamber 11, and the porous tube is connected to the inner cylinder wall of the sealing cylinder 10 and sleeved outside the detection end. The perforated pipe is provided with a plurality of through holes which are communicated with the inside of the perforated pipe and the static pressure cavity 11. When the refrigerant flows through the porous pipe, the porous pipe can play a certain filtering role, and the fluctuation of the pressure of the gaseous refrigerant at the detection end is reduced.
Referring to fig. 2, a heat pump system according to an embodiment of the second aspect of the present utility model includes a refrigerant state detecting device 100 according to an embodiment of the first aspect of the present utility model.
In the heat pump system provided by the embodiment of the utility model, a refrigerant state detection device 100 comprises a sealing cylinder 10 and a pressure detection element 12, a static pressure cavity 11 is arranged in the sealing cylinder 10, and an inlet 101 and an outlet 102 which are communicated with the static pressure cavity 11 and the outside of the sealing cylinder 10 are arranged on the cylinder wall of the sealing cylinder 10; the pressure detecting element 12 is connected to the cylinder wall, and the detecting end is located at one side of the cylinder wall facing the hydrostatic cavity 11. The cross section area of the sealing cylinder 10 is larger than that of the refrigerant pipeline, the refrigerant flowing at high speed flows into the sealing cylinder 10 along the inlet 101, the static pressure cavity 11 and the refrigerant pipeline are kept smooth, the flow speed of the refrigerant flowing at high speed is reduced after the refrigerant enters the static pressure cavity 11, the dynamic pressure of the refrigerant is rapidly reduced, the pressure fluctuation is stable, the interference to the detection end is small, and therefore the detection result is more accurate, and the high-efficiency operation of the heat pump system can be controlled.
In some embodiments, the number of refrigerant condition sensing devices 100 is two, one for sensing the discharge pressure of the compressor and the other for sensing the suction pressure of the compressor.
Referring to fig. 2, in the heat pump system, the suction pressure and the discharge pressure of the compressor are both obtained by the refrigerant state detecting device 100, so that the detection result is more accurate, which is helpful for accurately controlling the state of the refrigerant in the refrigerant circulation loop and improving the efficiency of thermal cycle.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.
Claims (10)
1. A refrigerant state detection device, comprising:
The sealing cylinder is provided with a static pressure cavity, and the cylinder wall of the sealing cylinder is provided with an inlet and an outlet which are communicated with the static pressure cavity and the outside of the sealing cylinder;
The pressure detection element is provided with a detection end, and is connected to the cylinder wall, and the detection end is positioned on one side of the cylinder wall facing the static pressure cavity.
2. The refrigerant state detection device according to claim 1, further comprising a temperature detection element having a temperature sensing end, wherein the temperature detection element is connected to the cylinder wall, and a side wall of the temperature sensing end is located in the static pressure chamber.
3. The refrigerant state detection device according to claim 2, wherein a temperature detection blind pipe is sleeved on the outer side of the temperature sensing end, and a heat conduction filling piece is arranged between the temperature sensing end and the inner wall of the temperature detection blind pipe.
4. The refrigerant state detecting device according to claim 3, wherein one end of the temperature detecting blind pipe is connected to the cylinder wall.
5. The refrigerant state detection device according to claim 2, wherein the length of the temperature sensing end extends at least to the center of the static pressure chamber.
6. The refrigerant state detecting device according to any one of claims 1 to 5, wherein the seal cylinder includes a straight cylinder section and arc-shaped transition sections at both ends of the straight cylinder section, the inlet and the outlet are provided in one-to-one correspondence to the arc-shaped transition sections at both ends, and the pressure detecting element is located at the straight cylinder section.
7. The refrigerant state detection device according to any one of claims 1 to 5, wherein a filter member is provided in the hydrostatic chamber, the filter member being located between the inlet and the outlet.
8. The refrigerant state detecting device according to any one of claims 1 to 5, wherein a porous tube is provided in the hydrostatic chamber, and the porous tube is connected to the cylinder wall and is sleeved outside the detecting end.
9. A heat pump system comprising the refrigerant condition detecting device according to any one of claims 1 to 8.
10. The heat pump system according to claim 9, wherein the number of refrigerant condition detecting means is two, one of which is for detecting the discharge pressure of the compressor and the other of which is for detecting the suction pressure of the compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322603733.1U CN221098929U (en) | 2023-09-25 | 2023-09-25 | Refrigerant state detection device and heat pump system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322603733.1U CN221098929U (en) | 2023-09-25 | 2023-09-25 | Refrigerant state detection device and heat pump system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221098929U true CN221098929U (en) | 2024-06-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322603733.1U Active CN221098929U (en) | 2023-09-25 | 2023-09-25 | Refrigerant state detection device and heat pump system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221098929U (en) |
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2023
- 2023-09-25 CN CN202322603733.1U patent/CN221098929U/en active Active
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