CN209840373U

CN209840373U - Air conditioning system and flow valve

Info

Publication number: CN209840373U
Application number: CN201920520788.7U
Authority: CN
Inventors: 温泯毅
Original assignee: Saun Shing Ind Co ltd
Current assignee: Saun Shing Ind Co ltd
Priority date: 2019-02-11
Filing date: 2019-04-17
Publication date: 2019-12-24
Anticipated expiration: 2029-04-17
Also published as: TW202030443A; CN111550914A; TWI716813B

Abstract

The utility model discloses a cooling and heating air conditioning system and flow valve. The flow valve comprises a valve body and a driving module. The driving module is mechanically coupled with the valve body through a transmission component to drive the valve body to rotate. The transmission assembly includes a calibration assembly having a pair of touch switches and a cam coupled to the driving module, the cam having a protrusion configured to be movable between the pair of touch switches.

Description

Air conditioning system and flow valve

Technical Field

The utility model discloses a flow valve for central air conditioning system especially relates to a cooling and heating air conditioning system and possess the flow valve of self calibration ability.

Background

The air conditioning system mainly comprises a window type air conditioner, a split type air conditioner and a central air conditioning system, wherein the window type air conditioner and the split type air conditioner are single machine systems, and the central air conditioning system mainly comprises an ice water machine, an air conditioning box, a coil fan and a conveying pipeline. The central air conditioning system uses ice water or hot water to adjust the environmental conditions, including temperature, humidity and convection, to meet the indoor comfort or work requirements. A typical central air conditioning system may include a main ice water or hot water unit, one or more coil fans (or blowing coils) disposed on a thermal load, and a cooling tower. The ice water main machine is provided with a condenser and an evaporator which are connected through a compressor, the condenser is connected to the cooling water tower in a circulating mode and is responsible for heat dissipation, the evaporator is connected to the heat load and is responsible for heat absorption, and the compressor is responsible for compressing a refrigerant to achieve the purpose of heat exchange between the condenser and the evaporator. The hot water main machine adopts the operation opposite to that of the ice water main machine.

One or more flow valves can be connected to the pipeline between the ice water main machine or the hot water main machine and the coil pipe fan or the water outlet end of the coil pipe fan, and are used for controlling the flow of ice water and achieving the purpose of temperature control. The traditional control method of the coil fan or the air supply coil mostly uses the flow of ice water or hot water to maintain the indoor set temperature, and the flow is mostly controlled by a three-way electromagnetic valve or a two-way electromagnetic valve. For example, when the indoor temperature reaches the set temperature, the two-way valve is immediately closed, and the three-way electromagnetic valve directly bypasses the ice water or the hot water from the water inlet end to the water return end, so as to achieve the effect of adjusting the indoor temperature. However, these methods consume a large amount of ice water and hot water, and also cause problems of considerable noise and water hammer.

Therefore, in order to further improve the energy saving effect, it is necessary to develop an improved flow control valve, especially a flow valve capable of reducing the control error.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a flow valve contains: a valve body for controlling a flow rate; a driving module mechanically coupled to the valve body via a transmission assembly to drive the valve body to rotate; a control circuit for driving the driving module. The transmission assembly includes: a calibration assembly including a pair of touch switches and a cam coupled to the driving module, the cam having a protrusion configured to be movably disposed between the pair of touch switches. The touch switch transmits a touch signal to the control circuit corresponding to the touch of the protrusion, and the control circuit stops the driving module based on the touch signal.

In one embodiment, the drive assembly further comprises a connector connecting the valve body and the cam of the calibration assembly.

In one embodiment, the pair of touch switches has a first touch switch at a first position and a second touch switch at a second position, the projection of the cam moving between the first position and the second position.

In one embodiment, the first touch switch and the second touch switch are respectively provided with an elastic mechanism.

In one embodiment, the first position and the second position determine a range of rotation of the cam.

In one embodiment, the range of rotation of the cam is ninety degrees.

In one embodiment, the connector is connected to the cam by an engagement means.

Another object of the present invention is to provide a cooling and heating air conditioning system, comprising: a main machine, which provides circulating ice water and warm water; the load is in flow connection with the host machine and can receive the ice water and the warm water; and a flow valve, the flow valve is disposed on the load, the flow valve can adjust the flow of the ice water or the warm water of the load. The flow valve comprises: a body having a flow channel; the valve body can be rotatably accommodated in the flow passage; a temperature detector configured to read temperature information about the body; and the driving module is mechanically coupled with the valve body through a transmission assembly and can drive the valve body to rotate. The driving assembly comprises a pair of touch switches and a cam, the cam is coupled with the driving module and provided with a protruding part, and the protruding part is movably arranged between the pair of touch switches; and the control circuit can receive a detection signal through the temperature detector, is in communication connection with the driving module and controls the driving module to drive the valve body to rotate, and adjusts a position of the protruding part of the cam relative to the paired touch switches according to the detection signal. The cam determines a position of the valve body at a position between the pair of touch switches, and the position of the valve body determines the flow rate.

Another object of the present invention is to provide a flow valve, comprising: a body having a flow channel; the valve body can be rotatably accommodated in the flow passage; a temperature detector configured to read temperature information about the body; a driving module mechanically coupled to the valve body via a transmission assembly, wherein the driving module can drive the valve body to rotate, the transmission assembly comprises a pair of touch switches and a cam coupled to the driving module, and the cam has a protrusion configured to be movably disposed between the pair of touch switches; and the control circuit receives a detection signal through the temperature detector, is in communication connection with the driving module and controls the driving module to drive the valve body to rotate, and adjusts a position of the protruding part of the cam relative to the paired touch switches according to the detection signal.

A further object of the present invention is to provide a flow valve, comprising: a valve body for controlling a flow rate; a driving module mechanically coupled to the valve body through a transmission assembly, the driving module driving the valve body to rotate, the transmission assembly including a pair of touch switches and a cam coupled to the driving module, the cam having a protrusion configured to be movably disposed between the pair of touch switches; and the control circuit can receive a detection signal, is in communication connection with the driving module and controls the driving module to drive the valve body to rotate, enables the protruding part to touch the paired touch switches according to the detection signal and transmits a touch signal to the control circuit, and after the control circuit controls the protruding part to return to a preset initial position based on the touch signal, the control circuit starts to adjust the protruding part of the cam to be arranged at a preset position between the paired touch switches from the preset initial position. That is, the control circuit can rotate the cam to a predetermined position according to the user's requirement, after rotating the cam to a predetermined initial position for valve calibration, so that the valve is maintained at a desired flow rate after calibration.

In summary, compared with the prior art, the present invention has the following advantages, and has the capability of self-calibrating the position of the valve body; the stepless driving module can obtain more accurate temperature control.

Drawings

The drawings are only intended to illustrate and explain the present invention and do not limit the scope of the invention. Wherein:

figure 1 shows a perspective view of the flow valve of the present invention.

Figure 2 shows the explosion diagram of the flow valve of the present invention.

Figure 3 shows a plan view of the inventive calibration assembly.

Fig. 4A to 4B show a control flow of the flow valve according to the present invention.

Fig. 5A to 5B are test curves of the conventional two-way valve.

Fig. 6A to 6B are the test curves of the flow valve of the present invention.

The reference numbers illustrate:

100. a housing; 200. A body;

101. an upper shell; 201. A valve body;

102. a lower case; 301. A first touch switch;

103. an upper seat; 302. A second touch switch;

104. a lower seat; 303. A cam;

110. a driving module; 3031. A projection;

120. calibrating the component; 3032. A groove;

130. a connector; 304. A support structure;

140. a temperature detector; 305. A resilient arm;

150. a control circuit; s400, a step;

s401, a step; s402, a step;

s403, step; and S404, step.

Detailed Description

In the following detailed description of various exemplary embodiments, reference is made to the accompanying drawings, which form a part hereof. And are shown by way of illustration, in which various described embodiments may be practiced. Sufficient detail is provided to enable those skilled in the art to practice each of the embodiments, and it is to be understood that other embodiments may be utilized, and that other changes may be made, without departing from the spirit or scope thereof. Furthermore, references to "an embodiment" do not necessarily pertain to the same or singular embodiments, although they may. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of various described embodiments is defined only by the appended claims.

Throughout the specification and claims, the following terms have the meanings explicitly associated herein, unless the context clearly dictates otherwise. As used herein, the term "or" is an inclusive "or" usage and is equivalent to the term "and/or" unless explicitly stated otherwise. Unless the context clearly dictates otherwise, the word "based on" is not exclusive and allows for the basis of many other factors that are not recited. In addition, in the entire application, the meaning of "a", "an" and "the" includes a plurality of references. The meaning of "in …" includes "in …" and "on …".

The following presents a simplified summary of various subject matter in order to provide a basic understanding of some aspects. This brief description is not intended as a complete overview. This brief description is not intended to be used to identify key or critical elements or to delineate or otherwise narrow the scope. Its purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is presented later.

Fig. 1 shows a flow valve of the present invention, which includes a housing 100 and a body 200 partially covered by the housing 100. The body 200 has a flow channel, both ends of which can be respectively connected with corresponding connectors to make the flow valve of the present invention installed to a pipeline system having a specific purpose, such as a pipeline system of a central air conditioner. The body 200 may be a structure extending in a single direction, or may be another structure. The body 200 is the location of flow control. Typically, a flow adjustment means is provided within the body 200 whereby the amount of water flowing into or out of the flow valve is controlled.

Fig. 2 is an exploded view according to fig. 1, which shows other components enclosed in the housing 100, including a driving module 110, a calibration assembly 120, a connector 130, a temperature detector 140, and a control circuit 150. The housing 100 is formed by an upper shell 101 and a lower shell 102, and the inner sides of the upper shell 101 and the lower shell 102 may be provided with a complex limiting structure for supporting or positioning the tamper evident feature. In addition, other support elements may be provided in the housing, such as an upper seat 103 and a lower seat 104 for fixing the body 200.

The driving module 110 is configured to receive a driving signal from the control circuit 150 or other control terminal to rotate the driving module. As shown, the drive module spindle (not numbered) is oriented toward the center of the tube 200. The driving module 110 may be accommodated in the upper case 101 and the lower case 102 by a supporting means. As shown, the driving module 110 may be connected to a fixing member 111, and the fixing member 111 is configured to cooperate with the limiting structures in the upper shell 101 and the lower shell 102, so that the driving module 110 can be more stably accommodated therein.

One side of the alignment assembly 120 (see fig. 3) is configured to couple with the rotation shaft of the driving module 110, so that the driving force is transmitted to the alignment structure 120. The other side of the calibration assembly 120 is configured to connect with a connector 130. The alignment member 120 and the connector 130 constitute a transmission member for transmitting the driving force of the driving module. Through the transmission assembly, the power of the driving module 110 is transmitted to a valve body 201 accommodated in the body 200.

Referring to fig. 3, the calibration assembly 120 includes a pair of touch switches (including a first touch switch 301 and a second touch switch 302), a cam 303 and a supporting structure 304. The pair of touch switches (including the first touch switch 301 and the second touch switch 302) is supported by the supporting structure 304, and the supporting structure 304 is configured to be stably received in the upper casing 101 and the lower casing 102, so that the pair of touch switches (including the first touch switch 301 and the second touch switch 302) are at different vertical positions and horizontal positions in the casing 100, respectively. Of course, in other possible embodiments, other variations of the supporting structure 304 may allow the pair of touch switches (including the first touch switch 301 and the second touch switch 302) to have different orientations, or the relative relationship between the pair of touch switches may be changed. The pair of touch switches (including the first touch switch 301 and the second touch switch 302) can be implemented by using a large current micro switch, and the details thereof are not described herein. The pair of touch switches has a first touch switch 301 located at a first position and a second touch switch 302 located at a second position, which are configured to clamp or only surround the periphery of the cam 303. The contact ends of the first touch switch 301 and the second touch switch 302, i.e. the ends contacting the cam 303, can adopt a roller means to make the contact between the cam 303 and the touch switches smoother. The first touch switch 301 and the second touch switch 302 each have a resilient mechanism, shown as a resilient arm 305, which supports the roller means around the cam 303.

The cam 303 has a projection 3031 and a recess 3032. The cam 303 may be an annular structure, a cylindrical structure, or a plate-like structure. The projection 3031 extends outwardly from a peripheral surface of the cam 303, while the recess 3032 is sized and shaped to engage the shaft of the drive module 110. Preferably, the size of the cam 303 is appropriately selected to move the protruding portion 3031 along a rotation path passing through the pair of touch switches (including the first touch switch 301 and the second touch switch 302) located at the first position and the second position. Specifically, the protruding portion 3031 is configured to move between the pair of touch switches (including the first touch switch 301 and the second touch switch 302) without passing over any touch switch. In one embodiment, the pair of touch switches (including the first touch switch 301 and the second touch switch 302) and the cam 303 are configured to move the projection 3031 within a range of ninety degrees defined by the first position and the second position and the cam rotation axis. Any one of the pair of touch switches (including the first touch switch 301 and the second touch switch 302) can generate a touch signal after receiving a certain pressure from the protruding portion 3031. The control circuit 150 may stop the operation of the driving module 110 in response to the touch signal. Therefore, the cooperation of the front release spring mechanism with the cam 303 is important for the mechanical sensitivity.

In other embodiments, the number of touch switches may be greater or less than two. In some embodiments, the number of projections may also be more than one. In possible embodiments, more touch switch and cam combinations may be included in a single calibration mechanism.

Referring back to fig. 2, the other side of the cam 303 engages the connector 130, i.e., the contact surfaces of the cam 303 and the connector 130 can be configured to have cooperating mechanical structures, such as ribs and grooves, to allow the cam 303 and the connector 130 to rotate synchronously. The connector 130 is also coupled to a valve body 201, which may be a ball valve or a butterfly valve, etc., in the body 200 by suitable means.

The temperature detector 140 is embedded in the body 200 in a suitable manner, such as in the wall of the body, and transmits a detection signal to the control circuit 150, thereby detecting the temperature of the water flowing through the body 200. The control circuit 150 may include a circuit configuration such as a processor and memory for performing signal processing and executing instructions. The control circuit 150 may be configured to be communicatively coupled to a remote computer to exchange various data or control commands with each other.

Fig. 4A and 4B respectively show a control flow of the flow valve, including steps S400 to S402 and steps S403 to S404.

FIG. 4A depicts an automatic calibration mechanism after the flow valve is activated from a closed state. In the control of the stepless switch, the rotation of the drive module is not fixed, and errors are easily accumulated in a plurality of rotations, so that the position desired by the control command is not consistent with the actual position of the valve body 201. The control circuit 150 may perform some or all of these steps. And S400, starting a flow valve. Prior to this step, the flow valve may be closed or armed, i.e., not activated. The control circuit 150 of the flow valve can execute the instructions carried internally based on an activation signal from either the internal or the remote location. Step S400 is ended.

In step S401, according to the aforementioned activation, the control circuit 150 causes the driving module 110 to rotate the cam 303 until the protrusion portion 3031 touches one of the pair of touch switches (including the first touch switch 301 and the second touch switch 302). According to the initial setting, the protrusion portion 3031 rotates clockwise or counterclockwise to touch the first touch switch 301 or the second touch switch 302 until the switch generates a touch signal according to the touch, which indicates that the protrusion portion 3031 of the cam 303 has reached the calibrated first position or the calibrated second position. Step S401 is ended.

In step S402, according to the aforementioned touch, the control circuit 150 stops the driving module 110 from rotating the cam 303, so as to stop the protrusion portion 3031 of the cam 303 at the first position or the second position adjacent to the first touch switch 301 or the second touch switch 302. At this time, the valve body 201 of the flow valve also reaches a preset initial position corresponding to the first position or the second position, and the calibration of the flow valve is completed. In one embodiment, the start position represents a fully closed or open flow valve flow condition. Of course, the present invention is not limited thereto. Thus, the calibration mechanism therein is performed at the same time each time the flow valve is activated or awakened. The control circuit 150 may not recognize the position of the valve body 201, but through the calibration mechanism, it is ensured that the valve body will return to the initial position recognized by the control circuit 150, i.e., the flow is closed or fully open. In this step, the switch touched by the cam 303 is regarded as a predetermined initial position for calibration, and the other switch not touched is regarded as an extreme position of the cam 303 or the valve body 201, i.e., a maximum rotation amount from the predetermined initial position is limited. Step S402 is ended.

In other embodiments, the aforementioned calibration mechanism may still be performed in a state where the flow valve is not closed, i.e., is operable. A certain degree of rotational error may have accumulated over a number of flow valves with stepless control. In this regard, the control circuit 150 may perform the aforementioned steps S401 and S402 according to the calibration signal from the internal or remote end. In some embodiments, the control circuit 150 completes calibration after the cam 303 returns to the preset initial position, and the control circuit 150 may further automatically rotate the cam 303 from the preset initial position to an initial position between the touch switches (including the first touch switch 301 and the second touch switch 302) according to user requirements and settings, which is regarded as a position where the valve body 201 must stay after calibration. This may be the case where it is undesirable for the calibrated valve body 201 to be in a fully open or fully closed flow position.

Fig. 4B depicts a temperature control process for the flow valve, including steps S403 and S404. In step S403, a temperature detecting means is used to read the temperature of the water flowing through the flow valve. Such as by embedding the temperature detector 140 in the body 200. Generally, the flow valve is installed at a water outlet of the coil fan, so that the water temperature at the water outlet is mainly detected. The temperature detector 140 generates a detection signal according to the current water temperature or a temperature difference value. Step S403 is ended.

In step S404, the control circuit 150 rotates or does not rotate the driving module 110 according to the temperature detection and a predetermined temperature threshold, wherein the rotation is clockwise or counterclockwise, and the rotation range is related to a rotation time of the driving module. In one embodiment, the control circuit 150 is configured to drive the driving module 110 with a given time parameter, which is rotated at a constant speed according to the parameter. The unit of the time parameter can be seconds or milliseconds, so that the driving module 110 acts as if it is continuously changed.

The flow valve may be included in a cooling and heating system. Particularly, the utility model discloses the flow valve can settle coil pipe fan's in the system play water end realizes temperature monitoring and flow control. The cooling and heating system can selectively provide a cooling mode or a heating mode, which depends on the temperature of water provided by the system, and the flow valve can be configured to perform flow control based on the cooling mode or the heating mode. For example, the control circuit of the flow valve of the present invention can be configured such that the control circuit 150 recognizes that the system is performing the cooling mode or the heating mode according to a detection signal from the temperature detector 140. In one embodiment, the control circuit 150 may further identify the pattern according to one or more predetermined thresholds. The control circuit 150 analyzes a temperature value associated with the detection signal and compares the temperature value with the threshold value to determine whether the cooling mode or the heating mode is performed by the system. For example, the cold mode is when the temperature of the outlet end is less than fifteen degrees celsius, and the warm mode is when the temperature of the outlet end is greater than forty degrees celsius.

Fig. 5A and 5B show test data of the conventional two-way valve. Fig. 6A and 6B show the test data of the flow valve of the present invention. Fig. 5A and 6A are statistics on the amount of water input and output over time. Fig. 5B and 6B are statistics on inlet water temperature and outlet water temperature over time. These data are based on the same test, including starting the ice water main machine once the room temperature reaches 30 degrees celsius, temperature control at 23 degrees celsius, heating load at 45% and pumping frequency at 60 hertz. The solid line data in the graph is the detection at the water outlet or the water return, the dotted line is the detection at the water inlet, the chain line is the real-time indoor temperature, and the section line is the temperature difference between the inlet and the outlet water.

Compare fig. 5A and fig. 6A and can learn the difference of water inflow, the water inflow that adopts current two-way valve is on average 6.5GPM in this test, and adopts the utility model discloses the flow valve is on average 4GPM in this test. Obviously the utility model discloses flow valve's water consumption is comparatively saved. Compare the difference of knowing the business turn over water difference in temperature of 5B and 6B, the business turn over water difference in temperature that adopts current two-way valve is on average 3 degrees centigrade in this test, and adopts the utility model discloses the business turn over water difference in temperature of flow valve is on average about 5 degrees centigrade in this test. Obviously adopt the utility model discloses flow valve's water can absorb relatively much heat, and cooling efficiency is better. It should be understood that the data shown are only examples of the present invention, and are not intended to limit the various embodiments of the present invention.

Accordingly, the above description supports combinations of means for performing the specified actions, combinations of means for performing the specified actions and program instruction means for performing the specified actions. It will also be understood that each block of the flowchart illustrations, and combinations of blocks in the flowchart illustrations, can be implemented by modules, such as special purpose hard disk based systems which perform the specified steps or combinations of special purpose hard disks and computer instructions.

The above description is only exemplary of the present invention, and is not intended to limit the scope of the present invention. Any equivalent changes and modifications that can be made by one skilled in the art without departing from the spirit and principles of the invention should be considered within the scope of the invention.

Claims

1. An air conditioning system, comprising:

the main machine provides circulating ice water and warm water;

the load is in flow connection with the host machine and can receive the ice water and the warm water; and

a flow valve disposed in the load, the flow valve being capable of adjusting a flow rate of the ice water or the warm water of the load, the flow valve including:

a body having a flow channel;

the valve body is rotatably accommodated in the flow passage;

a temperature detector configured to read temperature information about the body;

a driving module mechanically coupled to the valve body through a transmission assembly, wherein the driving module can drive the valve body to rotate, the transmission assembly comprises a pair of touch switches and a cam, the cam is coupled to the driving module, and the cam has a protrusion configured to be movably disposed between the pair of touch switches; and

the control circuit can receive a detection signal through the temperature detector, is in communication connection with the driving module and controls the driving module to drive the valve body to rotate, and adjusts a position of the protruding part of the cam relative to the paired touch switches according to the detection signal.

2. A flow valve, comprising:

a body having a flow channel;

the valve body is rotatably accommodated in the flow passage;

3. A flow valve, comprising:

the valve body is used for controlling a flow;

a driving module mechanically coupled to the valve body through a transmission assembly, the driving module being capable of driving the valve body to rotate, the transmission assembly including a pair of touch switches and a cam coupled to the driving module, the cam having a protrusion configured to be movably disposed between the pair of touch switches; and

the control circuit can receive a detection signal, is in communication connection with the driving module and controls the driving module to drive the valve body to rotate, and controls the protrusion to touch the paired touch switches and transmit a touch signal to the control circuit according to the detection signal, and the control circuit controls the protrusion to return to a preset initial position based on the touch signal, and starts to adjust the protrusion of the cam to be arranged at a preset position between the paired touch switches at the preset initial position.

4. A flow valve as claimed in claim 3, characterised in that the valve body is a ball valve or a butterfly valve.

5. A flow valve as claimed in claim 3, wherein the drive assembly further comprises a connector connecting the valve body and the cam.

6. The flow valve of claim 3 wherein the pair of tactile switches has a first tactile switch in a first position and a second tactile switch in a second position, the projection of the cam moving between the first position and the second position.

7. The flow valve of claim 6, wherein the first touch switch and the second touch switch each have a resilient mechanism.

8. The flow valve of claim 6 wherein the first position and the second position determine a range of rotation of the cam.

9. A flow valve as claimed in claim 8, in which the range of rotation of the cam is ninety degrees.

10. A flow valve as claimed in claim 5, characterised in that the connector is connected to the cam by an engagement means.