A multi-connected heat pipe precision air conditioner

Abstract

The present invention provides a multi-connected heat pipe precision air conditioner, comprising an outdoor unit and an indoor unit. The indoor unit is provided with at least one set of heat exchange units, each set of heat exchange units comprises a fan, a heat exchanger, an indoor temperature sensor, a liquid pipe, and a gas pipe; the outdoor unit is provided with a liquid collecting pipe, a gas collecting pipe, a refrigerant pump, a solenoid valve, and an intermediate heat exchanger. The air conditioner is also provided with a system controller which is respectively electrically connected to the refrigerant pump, the solenoid valve, and the fans in each heat exchange unit and the indoor temperature sensors in each heat exchange unit to collect data and realize control, thereby reducing the power consumed by the refrigerant pump or the refrigeration compressor, so as to reduce the energy consumption of the air conditioner.

Description

Technical Field

[0001] The invention relates to a multi-connected heat pipe air conditioner, in particular to a multi-connected heat pipe precision air conditioner. Background Art

[0002] The existing multi-connected heat pipe precision air conditioner has a refrigerant pump and a refrigeration compressor in its system. When the refrigerant pump fails, the air conditioner activates the compressor for refrigeration to ensure uninterrupted refrigeration of the air conditioner.

[0003] The existing air conditioner has the following defects:

[0004] (1) In order to determine whether the refrigerant pump is in a faulty state, the manufacturer will install pressure sensors on the inlet and outlet pipes of the refrigerant pump respectively, so that the controller can determine the operating status of the refrigerant pump by reading the pressure difference between the inlet and outlet pipes. However, adding two pressure sensors will increase the product cost, making it difficult for the manufacturer to promote its air conditioners.

[0005] (2) When the air-conditioning terminal is cooling, no matter how large the current heat load is, the refrigerant pump and the refrigeration compressor are both turned on. As a result, even when the heat load is low, the energy efficiency of the air-conditioning system will be reduced due to the power consumed by the refrigerant pump and the refrigeration compressor.

[0006] Air conditioner manufacturers are eagerly awaiting the birth of an air conditioner that can reduce the power consumed by a refrigerant pump or a refrigeration compressor, thereby reducing the energy consumption of the air conditioner. Summary of the invention

[0007] The present invention aims to solve or partially solve the deficiencies in the prior art and provides a multi-connected heat pipe precision air conditioner for reducing the power consumed by a refrigerant pump or a refrigeration compressor to reduce the energy consumption of the air conditioner.

[0008] To this end, a multi-connected heat pipe precision air conditioner is provided, including an outdoor unit and an indoor unit. The indoor unit is provided with at least one heat exchange unit, each heat exchange unit includes a fan, a heat exchanger, an indoor temperature sensor, a liquid pipe, and a gas pipe; the outdoor unit is provided with a liquid collecting pipe, a gas collecting pipe, a refrigerant pump, a solenoid valve, and an intermediate heat exchanger.

[0009] The installation position of the outdoor unit is higher than that of the indoor unit;

[0010] The liquid inlet of the heat exchanger in each heat exchange unit is connected to one end of the collecting pipe through a liquid pipe, and the other end of the collecting pipe is divided into two paths, which are respectively connected in series with a refrigerant pump and a solenoid valve and then connected to the refrigerant liquid outlet of the intermediate heat exchanger; the air outlet of the heat exchanger in each heat exchange unit is connected to one end of the collecting pipe through an air pipe, and the other end of the collecting pipe is connected to the refrigerant air inlet of the intermediate heat exchanger; a fan is provided on one side of the heat exchanger in each heat exchange unit, and an indoor temperature sensor is provided near the heat exchanger in each heat exchange unit; the air conditioner is also provided with a system controller, which is electrically connected to the refrigerant pump, the solenoid valve, the fan in each heat exchange unit, and the indoor temperature sensor in each heat exchange unit to collect data and realize control.

[0011] Furthermore, a pressure sensor electrically connected to the system controller is arranged in the pipe connecting the refrigerant pump and the intermediate heat exchanger, and a refrigerant pump temperature sensor electrically connected to the system controller is arranged on the outer wall of the pipe at the refrigerant pump outlet.

[0012] Furthermore, an electronic expansion valve is included, which is arranged in a liquid pipe near a liquid inlet of the heat exchanger in each heat exchange unit. The system controller is electrically connected to the electronic expansion valve in each heat exchange unit to collect data and implement control.

[0013] Furthermore, the intermediate heat exchanger in the outdoor unit is also provided with a cooling medium input port and a cooling medium output port. The cooling medium input port takes cooling medium from the outside through a cooling medium input pipe, and the cooling medium output port of the intermediate heat exchanger discharges the cooling medium after absorbing heat to the outside through a cooling medium output pipe.

[0014] Also included is a computer-readable storage medium storing a computer program, which, when executed by a processor, periodically executes the following steps until the characteristic temperature difference e(k) is within a set range:

[0015] Step A. Calculate the difference between the detected temperature T1 detected by the indoor temperature sensor and the set temperature Ts to obtain the characteristic temperature difference e(k);

[0016] Step B. Compare the characteristic temperature difference e(k) with the set temperature difference value, selectively operate the working mode of the air conditioner according to the comparison result, and control the opening and closing states of the refrigerant pump and the solenoid valve in the outdoor unit according to the working mode;

[0017] Step C. According to the working mode, control the opening of the electronic expansion valve in the indoor unit and control the speed of the fan.

[0018] Furthermore, the step B further comprises:

[0019] When e(k) ≤ characteristic temperature difference 1 is detected for the continuous characteristic time 1, the refrigerant pump and the solenoid valve are turned off to operate the ventilation mode;

[0020] When the characteristic temperature difference 1﹤e(k)≤characteristic temperature difference 2 is detected for the continuous characteristic time 2, the refrigerant pump is turned off and the solenoid valve is turned on to operate the gravity heat pipe cooling mode;

[0021] When e(k)>characteristic temperature difference 2 is detected for the continuous characteristic time 1, the refrigerant pump is turned on and the solenoid valve is closed to operate the power heat pipe cooling mode;

[0022] The characteristic time 1, characteristic time 2, characteristic temperature difference 1, and characteristic temperature difference 2 are all set values.

[0023] Furthermore, the step C further comprises:

[0024] In ventilation mode, close the electronic expansion valve and control the fan to run at a low speed;

[0025] In the gravity heat pipe cooling mode, the electronic expansion valve is adjusted to the set opening, and the characteristic temperature difference e(k) and the minimum fan speed f1 are substituted into the PI algorithm to obtain the speed f to control the fan;

[0026] In the power heat pipe cooling mode, the characteristic temperature difference e(k) and the minimum fan speed f1 are substituted into the PI algorithm to obtain the speed f to control the fan, and the characteristic temperature difference e(k) and the initial opening V1 of the electronic expansion valve are substituted into the PI algorithm to obtain the opening V to control the electronic expansion valve.

[0027] Furthermore, the PI algorithm is used to obtain the rotation speed f and the opening V as follows:

[0028] Substitute the characteristic temperature difference e(k) and the fan minimum speed f1 into the PI formula: Speed In order to calculate the value of the rotational speed f, the K P is the fan speed regulation coefficient, K I is the fan speed regulation integral coefficient;

[0029] Substitute the characteristic temperature difference e(k) and the initial opening degree V1 of the electronic expansion valve into the PI formula: In order to calculate the value of the opening V, the K P ′ is the proportional coefficient of the electronic expansion valve adjustment, K I 'Adjust the integral factor for the electronic expansion valve.

[0030] Furthermore, it also includes a computer-readable storage medium storing a computer program, which implements the following step D when executed by a processor:

[0031] Pre-store the maximum working pressure difference ΔPmax and the minimum working pressure difference ΔPmin of the refrigerant pump;

[0032] Collect the temperature ta detected by the refrigerant pump temperature sensor, and find the saturated pressure T of the refrigerant at the corresponding temperature ta;

[0033] The pressure P detected by the pressure sensor is collected, the difference between the pressure T and the pressure P is compared with ΔPmax and ΔPmin, and the on / off state of the refrigerant pump is controlled according to the comparison result.

[0034] Furthermore, the control of the on / off state of the refrigerant pump according to the comparison result is specifically:

[0035] If T-P<ΔPmin or T-P>ΔPmax is detected within characteristic time 4, the refrigerant pump is turned off and the solenoid valve is opened to enter the gravity heat pipe cooling mode;

[0036] If T-P<ΔPmin or T-P>ΔPmax is detected for multiple times within the characteristic time 5, a fault message is issued, the refrigerant pump is turned off, and the solenoid valve is opened to enter the gravity heat pipe cooling mode. Otherwise, the on / off state of the refrigerant pump is not changed, the number of detections is reset, and step D is re-executed to monitor the refrigerant pump;

[0037] The characteristic time 4 and the characteristic time 5 are set values.

[0038] Beneficial effects:

[0039] A multi-connected heat pipe precision air conditioner of the present invention comprises an outdoor unit and an indoor unit. The indoor unit is provided with at least one set of heat exchange units, each of which comprises a fan, a heat exchanger, an indoor temperature sensor, a liquid pipe, and an air pipe; the outdoor unit is provided with a liquid collecting pipe, an air collecting pipe, a refrigerant pump, an electromagnetic valve, and an intermediate heat exchanger. The liquid inlets of the heat exchangers in each heat exchange unit are all connected to one end of the liquid collecting pipe through the liquid pipe, and the other end of the liquid collecting pipe is divided into two paths, which are respectively connected in series with the refrigerant pump and the electromagnetic valve and then connected to the refrigerant in the intermediate heat exchanger. Liquid outlet; the air outlet of the heat exchanger in each heat exchange unit is connected to one end of the air collecting pipe through the air pipe, and the other end of the air collecting pipe is connected to the refrigerant air inlet of the intermediate heat exchanger; a fan is arranged on one side of the heat exchanger in each heat exchange unit, and an indoor temperature sensor is arranged near the heat exchanger in each heat exchange unit; the air conditioner is also provided with a system controller, which is electrically connected to the refrigerant pump, the solenoid valve, the fan in each heat exchange unit, and the indoor temperature sensor in each heat exchange unit to collect data. Then the power consumed by the refrigerant pump or the refrigeration compressor is reduced to reduce the energy consumption of the air conditioner.

[0040] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0042] Figure 1 It is a structural block diagram of a control device of a multi-connected heat pipe control method of the present invention;

[0043] Figure 2 It is a schematic diagram of the structure of the electronic device of the present invention;

[0044] Figure 3 The structure diagram of the computer-readable storage medium of the present invention. Explanation of the accompanying reference numerals: 1-fan; 2-heat exchanger; 3-liquid collecting pipe; 4-gas collecting pipe; 5-refrigerant pump; 6-solenoid valve; 7-2-indoor temperature sensor; 7-1-refrigerant pump temperature sensor; 8-pressure sensor; 9-intermediate heat exchanger; 10-cooling medium output pipe; 11-cooling medium input pipe; 12-system controller; 13-electronic expansion valve; 14-liquid pipe; 15-gas pipe; 21-processor; 22-memory; 23-storage space; 24-program code; 31-storage medium program code. DETAILED DESCRIPTION

[0045] The present invention is further described in conjunction with the following examples.

[0046] See Figure 1 , the air conditioner of this embodiment is divided into an indoor unit and an outdoor unit.

[0047] Two sets of heat exchanger units are arranged in the indoor unit, and each set of heat exchanger units includes: a fan 1, a heat exchanger 2, an indoor temperature sensor 7-2, an electronic expansion valve 13, a liquid pipe 14, and a gas pipe 15, wherein the fan 1 is arranged on one side of the heat exchanger 2 for heat dissipation; the indoor temperature sensor 7-2 is arranged on the other side of the heat exchanger 2 to collect its temperature; the two ends of the liquid pipe 14 are respectively connected to the liquid inlet of the heat exchanger 2 and the liquid collecting pipe 3 of the outdoor unit, and an electronic expansion valve 13 is arranged on the liquid pipe 14 near the liquid inlet of the heat exchanger 2 to control the flow rate of the liquid refrigerant flowing into the heat exchanger 2 in the outdoor unit; the two ends of the gas pipe 15 are respectively connected to the gas outlet of the heat exchanger 2 and the gas collecting pipe 4 of the outdoor unit.

[0048] The outdoor unit is provided with: a liquid collecting pipe 3, an air collecting pipe 4, a refrigerant pump 5, a solenoid valve 6, a refrigerant pump temperature sensor 7-1, a pressure sensor 8, an intermediate heat exchanger 9, a cooling medium output pipe 10, and a cooling medium input pipe 11. One end of the air collecting pipe 4 is connected to the air pipe 15 of the indoor unit to receive the vapor refrigerant in the indoor unit, and the other end of the air collecting pipe 4 is connected to the refrigerant air inlet of the intermediate heat exchanger 9. The gaseous refrigerant releases heat and cools down in the intermediate heat exchanger 9 to become liquid refrigerant, and then flows out of the intermediate heat exchanger 9. The refrigerant flows out of the refrigerant outlet of the intermediate heat exchanger 9; the intermediate heat exchanger 9 is also provided with a cooling medium input port and a cooling medium output port, one end of the cooling medium input pipe 11 is connected to the output port of an external cold source (such as a cooling tower), and the other end is connected to the cooling medium input port of the intermediate heat exchanger 9 to continuously obtain the cooling medium, and one end of the cooling medium output pipe 10 is connected to the cooling medium output port of the intermediate heat exchanger 9, and the other end is connected to the input port of an external cold source (such as a cooling tower) to continuously discharge the cold after absorbing heat. The cooling medium is sent to the cold source (such as a cooling tower), and the cooling medium cooled by the cold source (such as a cooling tower) enters the intermediate heat exchanger 9 again for heat exchange. The cold source (such as a cooling tower) cyclically provides cooling medium to the intermediate heat exchanger 9 so that the intermediate heat exchanger 9 is always full of cooling medium, thereby improving the heat exchange effect of the intermediate heat exchanger 9; one end of the collecting pipe 3 is connected to the liquid pipe 14 of the indoor unit, and the other end of the collecting pipe 3 is divided into two ends, which are respectively connected in series with the refrigerant pump 5 and the solenoid valve 6 and then connected to the refrigerant liquid outlet of the intermediate heat exchanger 9, so as to facilitate the transmission of the liquid refrigerant condensed in the outdoor unit back to the indoor unit. In the above, the refrigerant pump 5 and the solenoid valve 6 are used to control the flow rate and inflow speed of the liquid refrigerant flowing into the indoor unit from the intermediate heat exchanger 9; a pressure sensor 8 is arranged in the pipeline connecting the refrigerant pump 5 and the intermediate heat exchanger 9, and a refrigerant pump temperature sensor 7-1 is arranged on the pipeline of the refrigerant pump 5 outlet, which is used to detect the pressure and temperature of the refrigerant flowing through the refrigerant pump 5, and then judge whether the refrigerant pump 5 is operating normally.

[0049] In addition, the intermediate heat exchanger 9 is a heat exchanger that allows two fluid media to exchange heat indirectly, and can be replaced by a shell and tube heat exchanger, a plate heat exchanger, etc. The cooling medium can be water, R410A, ethylene glycol solution, etc.

[0050] The air conditioner of this embodiment is also provided with a system controller 12, which is electrically connected to the fan 1, indoor temperature sensor 7-2 and electronic expansion valve 13 of the indoor unit respectively to collect or output control signals of various components of the indoor unit; the system controller 12 is electrically connected to the refrigerant pump 5, solenoid valve 6, refrigerant pump temperature sensor 7-1 and pressure sensor 8 of the outdoor unit respectively to collect or output control signals of various components of the outdoor unit.

[0051] It should be noted that the indoor unit may be provided with not limited to two sets of heat exchanger units, and the increase in the number of heat exchanger units can improve the heat exchange capacity of the indoor unit; at the same time, one set of heat exchanger units can be used as an indoor unit, or two sets of heat exchanger units can be arranged up and down as one indoor unit.

[0052] Based on the above air conditioning structure, the following steps S1-S6 are executed to calculate the characteristic temperature difference e(k) of the first capacity calculation cycle, and the actions of the outdoor unit refrigerant pump 5 and the solenoid valve 6 are controlled respectively according to the comparison result between the characteristic temperature difference e(k) and the set characteristic temperature difference, and the opening degree of the electronic expansion valve 13 in the indoor unit and the speed of the fan 1 are adjusted:

[0053] Step S1. Set characteristic temperature difference 1 (for example, -2°C), characteristic temperature difference 2 (for example, 2°C), and control temperature difference Δe (for example, 0.5°C), calculate the difference between the detected temperature T1 (for example, 25°C) and the set temperature Ts (for example, 22°C) to obtain the characteristic temperature difference e(k), where the detected temperature T1 is the temperature value detected by the indoor temperature sensor 7-2 in the indoor unit.

[0054] For example, characteristic temperature difference e(k) = detected temperature T1 - set temperature Ts = 25 - 22 = 3°C.

[0055] Step S2. Set characteristic time 1 (for example, 1 minute) and characteristic time 2 (for example, 10 minutes). During the characteristic time, compare the characteristic temperature difference e(k) in step S1 with each temperature difference value in step S1. The system controller 12 collects the comparison results and determines the working mode of the indoor unit and the outdoor unit. Specifically,

[0056] (1) When e(k)≤-2°C is detected for 1 min continuously, the system controller 12 controls the air conditioner to operate in ventilation mode;

[0057] (2) When -2°C﹤e(k)≤2°C is detected for 10 consecutive minutes, the system controller 12 controls the air conditioner to operate in the gravity heat pipe cooling mode;

[0058] (3) When e(k)>2°C is detected for 1 min continuously, the system controller 12 controls the air conditioner to operate in the power heat pipe cooling mode.

[0059] Step S3. Control the refrigerant pump 5 and the solenoid valve 6 in the outdoor unit to open or close according to the working mode, specifically:

[0060] (1) When the system controller 12 controls the air conditioner to operate in ventilation mode, the system controller 12 turns off the refrigerant pump 5 and the solenoid valve 6;

[0061] (2) When the system controller 12 controls the air conditioner to operate in the gravity heat pipe cooling mode, the system controller 12 turns off the refrigerant pump 5 and opens the solenoid valve 6;

[0062] (3) When the system controller 12 controls the air conditioner to operate in the power heat pipe cooling mode, the system controller 12 turns on the refrigerant pump 5 and turns off the solenoid valve 6.

[0063] Step S4. Control the electronic expansion valve 13 in the indoor unit and the operating state of the fan 1 according to the working mode, specifically:

[0064] (1) When the system controller 12 controls the air conditioner to operate in ventilation mode, the system controller 12 closes the electronic expansion valve 13 and controls the fan 1 to maintain the lowest speed;

[0065] (2) When the system controller 12 controls the air conditioner to operate in the gravity heat pipe cooling mode, the system controller 12 controls the electronic expansion valve 13 to open to the maximum opening, and controls the fan 1 to rotate at the calculated speed f;

[0066] (3) When the system controller 12 controls the air conditioner to operate in the power heat pipe cooling mode, the system controller 12 controls the fan 1 to rotate at the calculated speed f and the electronic expansion valve 13 to open at the calculated opening V.

[0067] In the above, the specific calculation method of the rotation speed f of the fan 1 and the opening V of the electronic expansion valve 13 is as follows:

[0068] Substitute the characteristic temperature difference e(k) and the minimum fan speed f1 into the following PI formula to calculate the speed f of fan 1:

[0069] Speed

[0070] The K P is the fan speed regulation coefficient, K I is the fan speed regulation integral coefficient;

[0071] Substitute the characteristic temperature difference e(k) and the initial opening degree V1 of the electronic expansion valve into the following PI formula to calculate the opening degree V of the electronic expansion valve 13:

[0072] Opening

[0073] The K P ′ is the proportional coefficient of the electronic expansion valve adjustment, K I 'Adjust the integral factor for the electronic expansion valve.

[0074] Step S5. Repeat steps S1-S4 every other capacity calculation cycle, and so on for the speed f and opening V of i capacity calculation cycles, and continuously adjust the speed of the fan 1 and the opening of the electronic expansion valve 13 accordingly until the characteristic temperature difference e(k) is within the range of ±Δe.

[0075] Through the periodic control of steps S1-S4, the air conditioner can smoothly adjust the indoor temperature without causing excessive cooling output, thereby reducing the temperature fluctuation of the air conditioner refrigeration.

[0076] Furthermore, the outdoor unit of the air conditioner is installed on the top of the heat exchanger 2 higher than the indoor unit, so that when the system controller 12 operates in the gravity heat pipe mode, the liquid refrigerant in the outdoor unit can flow back to the indoor unit by gravity. Preferably, due to the small size of the outdoor unit, it can be installed on the top of the outdoor corridor.

[0077] Furthermore, after the technician determines the maximum working pressure difference ΔPmax and the minimum working pressure difference ΔPmin of the pump through the specification sheet of the refrigerant pump 5, they are pre-stored in the system controller 12. Thereafter, when the system controller 12 runs the power heat pipe refrigeration mode, the temperature ta detected by the refrigerant pump temperature sensor 7-1 on the pipe connected to the refrigerant pump 5 is collected, and the refrigerant saturation pressure T corresponding to the temperature ta is found by comparing it with the temperature-pressure comparison table of the refrigerant currently used. Then, the pressure P detected by the pressure sensor 8 in the pipe connected to the refrigerant pump 5 is collected, and the difference between the pressure T and the pressure P is compared with ΔPmax and ΔPmin. Then, the system controller 12 turns on or off the refrigerant pump 5 according to the comparison result to monitor the operating status of the refrigerant pump 5 and achieve the purpose of protecting the refrigerant pump 5.

[0078] In the above, the method of turning on or off the refrigerant pump 5 according to the comparison result is specifically as follows:

[0079] (1) If it is detected that T-P < ΔPmin or T-P > ΔPmax for a continuous period of time (e.g., 5 seconds), the system controller 12 turns off the refrigerant pump 5, opens the solenoid valve 6, does not report a fault message, and controls the air conditioner to exit the power heat pipe cooling mode and enter the gravity heat pipe cooling mode;

[0080] (2) After the above steps are executed, the refrigerant pump 5 is controlled to be turned on or off again according to step S3 after a delay of 5 minutes, and then the pressure T is calculated and the pressure P is collected. If T-P<ΔPmin or T-P>ΔPmax is detected three times in a row within 60 minutes, the system controller 12 reports a fault message, turns off the refrigerant pump 5, opens the solenoid valve 6, and prompts the maintenance personnel to repair the refrigerant pump 5. During the fault period, the system controller 12 controls the air conditioner to operate in the gravity heat pipe cooling mode;

[0081] (3) If, for example, T-P<ΔPmin or T-P>ΔPmax is not detected three times in succession within 60 minutes, the system controller 12 resets the number of detections to zero and re-monitors the refrigerant pump 5 .

[0082] The advantages of the present invention are:

[0083] 1. The system controller 12 can select one of the three modes: ventilation mode, gravity heat pipe cooling mode, and power heat pipe cooling mode for operation. The gravity heat pipe mode can adapt to lower heat loads and does not consume the power of the refrigerant pump 5 or the compressor, thereby solving the problem of low system energy efficiency and unstable control when the refrigerant pump 5 fails or the indoor heat load is low;

[0084] 2. The refrigerant pump 5 adopts a technical solution of a pressure sensor 8 and a refrigerant pump temperature sensor 7 to replace the technical solution of arranging a pressure sensor on each side of the refrigerant pump, thereby effectively reducing the equipment cost for monitoring the working condition of the refrigerant pump 5;

[0085] 3. By increasing the opening of the electronic expansion valve, the temperature control can be more precise and the target requirements can be achieved faster.

[0086] It should be noted that:

[0087] The method used in this embodiment can be converted into program steps and devices that can be stored in a computer storage medium, and implemented by being called and executed by a controller.

[0088] The algorithms and displays provided herein are not inherently related to any particular computer, virtual device, or other apparatus. The descriptions made in specific language are intended to disclose the best mode of carrying out the present invention.

[0089] In the description provided herein, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.

[0090] Similarly, it should be understood that in order to streamline the disclosure and aid in understanding one or more of the various inventive aspects, in the above description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together into a single embodiment, figure, or description thereof. However, this disclosed method should not be interpreted as reflecting the intention that the claimed invention requires more features than those expressly recited in each claim. Rather, as reflected in the claims, inventive aspects lie in less than all of the features of the individual embodiments previously disclosed. Therefore, the claims that follow the detailed description are hereby expressly incorporated into the detailed description, with each claim itself serving as a separate embodiment of the invention.

[0091] Those skilled in the art will appreciate that the modules in the devices in the embodiments can be adaptively changed and set in one or more devices different from the embodiments. The modules or units or components in the embodiments can be combined into one module or unit or component, and in addition they can be divided into multiple submodules or subunits or subcomponents. Except that at least some of such features and / or processes or units are mutually exclusive, all features disclosed in this specification (including the accompanying claims, abstracts and drawings) and all processes or units of any method or device disclosed in this manner can be combined in any combination. Unless otherwise explicitly stated, each feature disclosed in this specification (including the accompanying claims, abstracts and drawings) can be replaced by an alternative feature that provides the same, equivalent or similar purpose.

[0092] Furthermore, those skilled in the art will appreciate that although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features from different embodiments is meant to be within the scope of the present invention and to form different embodiments.

[0093] The various component embodiments of the present invention may be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. It should be understood by those skilled in the art that a microprocessor or a digital signal processor (DSP) may be used in practice to implement some or all of the functions of some or all of the components in the device for detecting the wearing state of an electronic device according to an embodiment of the present invention. The present invention may also be implemented as a device or device program (e.g., a computer program and a computer program product) for executing part or all of the methods described herein. Such a program for implementing the present invention may be stored on a computer-readable medium, or may be in the form of one or more signals. Such a signal may be downloaded from an Internet website, or provided on a carrier signal, or provided in any other form.

[0094] For example, Figure 2 A schematic diagram of the structure of an electronic device according to an embodiment of the present invention is shown. The electronic device conventionally includes a processor 21 and a memory 22 arranged to store computer executable instructions (program code). The memory 22 can be an electronic memory such as a flash memory, an EEPROM (electrically erasable programmable read-only memory), an EPROM, a hard disk or a ROM. The memory 22 has a storage space 23 for storing a program code 24 for executing any method steps in the embodiment. For example, the storage space 23 for program code may include individual program codes 24 for implementing various steps in the above method, respectively. These program codes can be read from or written to one or more computer program products. These computer program products include program code carriers such as a hard disk, a compact disk (CD), a memory card or a floppy disk. Such a computer program product is typically, for example Figure 3 The computer-readable storage medium may have Figure 2 The memory 22 in the electronic device of the present invention is similarly arranged as a storage segment, storage space, etc. The program code can be compressed, for example, in an appropriate form. Generally, the storage unit stores a storage medium program code 31 for executing the steps of the method according to the present invention, that is, a program code that can be read by a processor such as 21, and when these program codes are run by the electronic device, the electronic device performs the various steps in the method described above.

[0095] It should be noted that the above embodiments illustrate the present invention rather than limit it, and that those skilled in the art may devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference symbol between brackets shall not be construed as a limitation on the claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "one" or "an" preceding an element does not exclude the presence of a plurality of such elements. The present invention may be implemented by means of hardware comprising a number of different elements and by means of a suitably programmed computer. In a unit claim enumerating a number of devices, several of these devices may be embodied by the same hardware item. The use of the words first, second, and third, etc., does not indicate any order. These words may be interpreted as names.

Claims

1. A multi-connected heat pipe precision air conditioner, comprising an outdoor unit and an indoor unit, wherein the indoor unit is provided with at least one heat exchange unit, each heat exchange unit comprising a fan, a heat exchanger, an indoor temperature sensor, a liquid pipe, and a gas pipe; the outdoor unit is provided with a liquid collecting pipe, a gas collecting pipe, a refrigerant pump, a solenoid valve, and an intermediate heat exchanger, characterized in that: The installation position of the outdoor unit is higher than that of the indoor unit; The liquid inlet of the heat exchanger in each heat exchange unit is connected to one end of the collecting pipe through a liquid pipe, and the other end of the collecting pipe is divided into two paths, which are respectively connected in series with a refrigerant pump and a solenoid valve and then connected to the refrigerant liquid outlet of the intermediate heat exchanger; the air outlet of the heat exchanger in each heat exchange unit is connected to one end of the collecting pipe through an air pipe, and the other end of the collecting pipe is connected to the refrigerant air inlet of the intermediate heat exchanger; a fan is provided on one side of the heat exchanger in each heat exchange unit, and an indoor temperature sensor is provided near the heat exchanger in each heat exchange unit; the air conditioner is also provided with a system controller, which is electrically connected to the refrigerant pump, the solenoid valve, the fan in each heat exchange unit, and the indoor temperature sensor in each heat exchange unit to collect data and realize control; Also included is a computer-readable storage medium storing a computer program, which, when executed by a processor, periodically executes the following steps until the characteristic temperature difference e(k) is within a set range: Step A. Calculate the difference between the detected temperature T1 detected by the indoor temperature sensor and the set temperature Ts to obtain the characteristic temperature difference e(k); Step B. Compare the characteristic temperature difference e(k) with the set temperature difference value, selectively operate the working mode of the air conditioner according to the comparison result, and control the opening and closing states of the refrigerant pump and the solenoid valve in the outdoor unit according to the working mode; Step C. According to the working mode, controlling the opening of the electronic expansion valve in the indoor unit and the speed of the fan; The step B further comprises: When e(k) ≤ characteristic temperature difference 1 is detected for the continuous characteristic time 1, the refrigerant pump and the solenoid valve are turned off to operate the ventilation mode; When the characteristic temperature difference 1﹤e(k)≤characteristic temperature difference 2 is detected for the continuous characteristic time 2, the refrigerant pump is turned off and the solenoid valve is turned on to operate the gravity heat pipe cooling mode; When e(k)>characteristic temperature difference 2 is detected for the continuous characteristic time 1, the refrigerant pump is turned on and the solenoid valve is closed to operate the power heat pipe cooling mode; The characteristic time 1, characteristic time 2, characteristic temperature difference 1, and characteristic temperature difference 2 are all set values.

2. The air conditioner according to claim 1, characterized in that: A pressure sensor electrically connected to the system controller is arranged in the pipe connecting the refrigerant pump and the intermediate heat exchanger, and a refrigerant pump temperature sensor electrically connected to the system controller is arranged in the pipe at the liquid outlet of the refrigerant pump.

3. The air conditioner according to claim 1, characterized in that: It also includes an electronic expansion valve, which is arranged in a liquid pipe near a liquid inlet of the heat exchanger in each heat exchange unit. The system controller is electrically connected to the electronic expansion valve in each heat exchange unit to collect data and implement control.

4. The air conditioner according to claim 1, characterized in that: The intermediate heat exchanger in the outdoor unit is also provided with a cooling medium input port and a cooling medium output port. The cooling medium input port takes cooling medium from the outside through a cooling medium input pipe, and the cooling medium output port of the intermediate heat exchanger discharges the cooling medium after absorbing heat to the outside through the cooling medium output pipe.

5. The air conditioner according to claim 1, characterized in that: The step C further comprises: In ventilation mode, close the electronic expansion valve and control the fan to run at a low speed; In the gravity heat pipe cooling mode, the electronic expansion valve is adjusted to the set opening, and the characteristic temperature difference e(k) and the minimum fan speed f1 are substituted into the PI algorithm to obtain the speed f to control the fan; In the power heat pipe cooling mode, the characteristic temperature difference e(k) and the minimum fan speed f1 are substituted into the PI algorithm to obtain the speed f to control the fan, and the characteristic temperature difference e(k) and the initial opening V1 of the electronic expansion valve are substituted into the PI algorithm to obtain the opening V to control the electronic expansion valve.

6. The air conditioner according to claim 5, characterized in that: The PI algorithm is specifically used to obtain the speed f and the opening V as follows: Substitute the characteristic temperature difference e(k) and the minimum fan speed f1 into the PI formula: Speed ​​f +f1, in order to calculate the value of the speed f, the is the fan speed regulation coefficient, is the fan speed regulation integral coefficient; Substitute the characteristic temperature difference e(k) and the initial opening degree V1 of the electronic expansion valve into the PI formula: +V1, in order to calculate the value of the opening V, the Adjust the proportional coefficient for the electronic expansion valve, 'Adjust the integral factor for the electronic expansion valve.

7. The air conditioner according to claim 2, characterized in that: Also included is a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the following step D: Pre-store the maximum working pressure difference ΔPmax and the minimum working pressure difference ΔPmin of the refrigerant pump; Collect the temperature ta detected by the refrigerant pump temperature sensor, and find the saturated pressure T of the refrigerant at the corresponding temperature ta; The pressure P detected by the pressure sensor is collected, the difference between the pressure T and the pressure P is compared with ΔPmax and ΔPmin, and the on / off state of the refrigerant pump is controlled according to the comparison result.

8. The air conditioner according to claim 7, characterized in that: The control of the on / off state of the refrigerant pump according to the comparison result is specifically as follows: If T-P<ΔPmin or T-P>ΔPmax is detected within characteristic time 4, the refrigerant pump is turned off and the solenoid valve is opened to enter the gravity heat pipe cooling mode; If T-P<ΔPmin or T-P>ΔPmax is detected for multiple times within the characteristic time 5, a fault message is issued, the refrigerant pump is turned off, and the solenoid valve is opened to enter the gravity heat pipe cooling mode. Otherwise, the on / off state of the refrigerant pump is not changed, the number of detections is reset, and step D is re-executed to monitor the refrigerant pump; The characteristic time 4 and the characteristic time 5 are set values.

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