阅读说明：本技术 多联机系统 (Multi-split system ) 是由 王远鹏 于 2021-07-12 设计创作，主要内容包括：多联机系统,配置为可选择地执行制热运行或制冷运行,其包括：室外单元,其具有压缩机和室外热交换器；室内空调单元,其具有室内热交换器,室内热交换器通过制冷剂循环管路连接室外热交换器；和室内用水终端,其与室内空调单元并联设置并均设置于空调房间中,室内用水终端连接水氟换热器,其通过制冷剂循环管路连接室外热交换器；还包括：控制终端,其与空调房间一一对应设置,控制终端配置为接收设定室内温度；和控制器,其配置为接收设定室内温度,根据设定室内温度生成设定控制目标参数并控制压缩机运行。本发明实现采用同一个控制终端同时控制室内空调单元和室内用水终端,有效地简化用户操作,符合客户的使用习惯,显著地降低机组成本。(A multiple on-line system configured to selectively perform a heating operation or a cooling operation, comprising: an outdoor unit having a compressor and an outdoor heat exchanger; an indoor air conditioning unit having an indoor heat exchanger connected to an outdoor heat exchanger through a refrigerant circulation line; the indoor water terminal is connected with the water-fluorine heat exchanger and is connected with the outdoor heat exchanger through a refrigerant circulating pipeline; further comprising: the control terminals are arranged in one-to-one correspondence with the air-conditioned rooms and are configured to receive set indoor temperature; and a controller configured to receive a set indoor temperature, generate a set control target parameter according to the set indoor temperature, and control the operation of the compressor. The invention realizes that the same control terminal is adopted to simultaneously control the indoor air conditioning unit and the indoor water using terminal, thereby effectively simplifying the operation of a user, conforming to the use habit of the client and obviously reducing the unit cost.)

1. A multi-split system configured to selectively perform a heating operation or a cooling operation, the multi-split system comprising:

an outdoor unit having a compressor and an outdoor heat exchanger;

at least one indoor air conditioning unit having an indoor heat exchanger connected to an outdoor heat exchanger through a refrigerant circulation line; and

the indoor water utilization terminal is connected with the water-fluorine heat exchanger, and the water-fluorine heat exchanger is connected with the outdoor heat exchanger through a refrigerant circulating pipeline;

characterized in that, the many online systems still includes:

the control terminals are arranged in one-to-one correspondence with the air-conditioning rooms and are configured to receive set indoor temperature; and

a controller configured to receive the set indoor temperature, generate a set control target parameter according to the set indoor temperature, and control the compressor to operate.

2. A multi-split system as defined in claim 1,

the controller is also configured to sample the water temperature of the indoor water using terminal during heating operation and judge whether the water temperature meets a first set compressor stopping condition; if the water temperature meets a first set compressor stopping condition, controlling the compressor to stop;

wherein the first set compressor shutdown condition is that the water temperature is greater than or equal to a water temperature upper threshold.

3. A multi-split system as defined in claim 1,

the controller is also configured to sample the indoor environment temperature of an air-conditioning room during heating operation and judge whether the indoor environment temperature meets a second set compressor stop condition; if the indoor ambient temperatures of all the air-conditioning rooms meet the second set compressor stop condition, controlling the compressor to stop;

and the second set compressor stop condition is that the indoor environment temperature is greater than or equal to a set indoor temperature.

4. A multi-split system as defined in claim 1,

the controller is further configured to sample at least one operating parameter while in heating operation;

the controller is also configured to acquire first control target parameters H respectively_{zopt_tmp}And a second control target parameter H_{zopt_wmp}And the first control target parameter H_{zopt_tmp}And a second control target parameter H_{zopt_wmp}The smaller one of the control target parameters is used as the set control target parameter to control the operation of the compressor(ii) a Wherein the first control target parameter H_{zopt_tmp}Calculating the second control target parameter H according to the set indoor temperature_{zopt_wmp}And calculating according to the operation parameters.

5. A multi-split system as defined in claim 4,

the operation parameter is the exhaust pressure of the compressor;

the first control target parameter H_{zopt_tmp}The second control target parameter H is a first compressor target discharge pressure calculated according to the set indoor temperature_{zopt_wmp}Is a second compressor target discharge pressure calculated based on the operating parameter.

6. A multi-split system as claimed in claim 4, wherein

The operation parameter is the water temperature of the indoor water using terminal,

the first control target parameter H_{zopt_tmp}The second control target parameter H is the first set water temperature of the indoor water using terminal calculated according to the set indoor temperature_{zopt_wmp}Is a second set water temperature calculated from the real-time operating parameters.

7. A multi-split system as claimed in claim 5 or 6,

the controller is configured to calculate the first control target parameter H according to the set indoor temperature_{zopt_tmp}The following steps are executed:

acquiring a plurality of real-time indoor environment temperatures in a set sampling period;

calculating the difference value between each real-time indoor environment temperature and the set indoor temperature;

selecting the maximum value of the difference between the real-time indoor environment temperature and the set indoor temperature, and recording the maximum value as delta T_max；

Calculating the first control target parameter H_{zopt_tmp}，H_{zopt_tmp}＝C+ΔT_maxD; where C is a set value and D is a coefficient.

8. A multi-split system as claimed in claim 5 or 6,

the controller is configured to calculate the second control target parameter H according to the real-time operation parameter_{zopt_wmp}The following steps are executed:

judging a set interval to which the operation parameter belongs;

calling a correction value corresponding to the setting interval to which the operation parameter belongs according to the setting interval to which the operation parameter belongs;

taking the sum of the initial control target parameter and the correction value as a second control target parameter H_{zopt_wmp}(ii) a Wherein the initial control target parameter is a control target base number or a second control target parameter H 'calculated in the last control period'_{zopt_wmp}。

9. A multi-split system as defined in claim 8,

the controller is configured to calculate the second control target parameter H according to the real-time operation parameter_{zopt_wmp}The following steps are executed:

judging whether the operation parameters belong to a first set interval or not; if the second control target parameter belongs to the first set interval, the second control target parameter H_{zopt_wmp}Is the sum of the initial control target parameter and the first correction value G0;

judging whether the operation parameters belong to a second set interval or not; if the second control target parameter belongs to a second set interval, the second control target parameter H_{zopt_wmp}Is the sum of the initial control target parameter and the second correction value G1;

judging whether the operation parameters belong to a third set interval or not; if the second control target parameter belongs to a third set interval, the second control target parameter H_{zopt_wmp}Is the sum of the initial control target parameter and the third correction value G2;

judging whether the operation parameters belong to a fourth set interval or not; if the second control target parameter belongs to a fourth setting interval, the second control target parameter H_{zopt_wmp}Is the sum of the initial control target parameter and the fourth correction value G3;

judging whether the operation parameters belong to a fifth set interval or not; if the second control target parameter belongs to a fifth setting interval, the second control target parameter H_{zopt_wmp}Is the sum of the initial control target parameter and the fifth correction value G4;

wherein the initial control target parameter is a control target base number or a second control target parameter H 'calculated in the last control period'_{zopt_wmp}The boundary thresholds of the first setting section, the second setting section, the third setting section, the fourth setting section and the fifth setting section are sequentially decreased, and the first correction value G0, the second correction value G1, the third correction value G2, the fourth correction value G3 and the fifth correction value G4 are sequentially increased.

10. The multi-split system as claimed in claim 9,

if the operation parameter is the compressor discharge pressure, the first correction value G0, the second correction value G1, the third correction value G2, the fourth correction value G3 and the fifth correction value G4 take values within a numerical range of-0.5;

and if the operation parameter is the water temperature of the indoor water use terminal, the first correction value G0, the second correction value G1, the third correction value G2, the fourth correction value G3 and the fifth correction value G4 take values within a numerical range of-5.

Technical Field

The invention belongs to the technical field of air conditioning equipment, and particularly relates to a multi-split system.

Background

A multi-split system, also called a multi-split air conditioning (heat pump) unit, refers to a system in which one or more outdoor units can be connected to a plurality of indoor units of different or same types and capacities, thereby forming a circulation system to provide treated air to one or more target areas, or absorb heat from an outdoor environment medium and supply heat to the target areas.

For a multi-split air conditioning system integrated with heating and cooling functions, for example, an indoor unit of an air conditioner and a floor heating terminal are installed at an indoor end, and a target water temperature is usually used to control a frequency of a compressor in an outdoor unit. For example, the technical solution disclosed in chinese patent application (CN112032884A) is to adjust the operating frequency of the compressor according to the actual outlet water temperature of the water-cooled heat exchanger and the actual outlet water temperature of the water heater.

The control method is generally that a single wire controller is arranged to control the indoor unit of the air conditioner, another wire controller is arranged to control the waterway system, and users need to input target parameters respectively. This control method is costly and also does not conform to the user's usage habits, and users are often used to directly set the indoor target temperature rather than the water temperature.

Disclosure of Invention

The invention designs and provides a multi-split air conditioner (heat pump) unit in the prior art, particularly a multi-split air conditioner (heat pump) unit which is provided with an indoor air conditioner and a floor heating terminal indoors, and aims to solve the problems that target parameters need to be input through two controllers respectively, the control mode cost is high, and the use habit of a user is not met.

In order to realize the purpose of the invention, the invention is realized by adopting the following technical scheme:

a multi-split system configured to selectively perform a heating operation or a cooling operation, the multi-split system comprising: an outdoor unit having a compressor and an outdoor heat exchanger; at least one indoor air conditioning unit having an indoor heat exchanger connected to an outdoor heat exchanger through a refrigerant circulation line; the indoor water using terminal is connected with the indoor air conditioning unit in parallel and is arranged in an air conditioning room, the indoor water using terminal is connected with the water-fluorine heat exchanger, and the water-fluorine heat exchanger is connected with the outdoor heat exchanger through a refrigerant circulating pipeline;

the multiple on-line system further comprises: the control terminals are arranged in one-to-one correspondence with the air-conditioning rooms and are configured to receive set indoor temperature; and the controller is configured to receive the set indoor temperature, generate a set control target parameter according to the set indoor temperature and control the compressor to operate.

Compared with the prior art, the invention has the advantages and positive effects that: according to the multi-split air conditioning system provided by the invention, a user can realize automatic operation of the unit only by operating and setting the target indoor temperature, and the indoor air conditioning unit and the indoor water using terminal are simultaneously controlled by adopting the same control terminal, so that the user operation can be effectively simplified, the use habits of customers are met, and the unit cost is obviously reduced.

Other features and advantages of the present invention will become more apparent from the following detailed description of the invention when taken in conjunction with the accompanying drawings.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a multi-split system provided by the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and examples.

It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Aiming at the problems that target parameters need to be input through two controllers respectively in a multi-split air conditioner (heat pump) unit in the prior art, particularly the multi-split air conditioner (heat pump) unit provided with an indoor air conditioner and a floor heating terminal indoors, the control mode cost is high, and the use habit of a user is not met, a newly designed multi-split system is shown in figure 1. Such a multi-online system may be used in various buildings such as apartments, hotels, office buildings, and residential houses, and is configured to selectively perform a heating operation or a cooling operation.

The multiple on-line system includes main components such as an outdoor unit 11, an indoor air conditioning unit 12, and an indoor water terminal 13, which are connected to each other and operated in cooperation, wherein the outdoor unit 11 serves as a heat source of the entire multiple on-line system, and a compressor and an outdoor heat exchanger are provided in the outdoor unit 11 (the outdoor unit 11 can supply cooling (heating) to a plurality of air-conditioning rooms) (although two air-conditioning rooms (15-1 and 15-2) are exemplified in fig. 1, the present invention is not particularly limited to the number of air-conditioning rooms, the outdoor unit 11 can supply cooling (heating) to a greater number of air-conditioning rooms in the same manner, one indoor air conditioning unit 12 and one indoor water terminal 13 are provided in each air-conditioning room, an indoor heat exchanger is provided in the indoor air conditioning unit 12, and the indoor heat exchanger is connected to the outdoor heat exchanger through a refrigerant circulation pipe, the indoor water terminal 13 is provided in parallel with the indoor air conditioning unit 12, the indoor water using terminal 13 is connected with a water-fluorine heat exchanger, and the water-fluorine heat exchanger is connected with an outdoor heat exchanger through a refrigerant circulating pipeline. It should be noted that, the water-fluorine heat exchanger refers to a water-refrigerant heat exchanger, the type of the refrigerant in the present invention is not particularly limited, and the multi-split system may select the corresponding refrigerant according to actual needs. The water pipe of the water fluorine heat exchanger is connected to the indoor water terminal 13 and is configured to receive water to be heated from the water circulation circuit and supply warm or hot water to the indoor water terminal 13. The indoor water terminal 13 may guide warm or hot water to an area where water is used, such as a floor radiation heating facility or a heating facility, and may also guide the warm or hot water to a tank for storage or reheating, such as a water heater or the like.

The outdoor unit 11 performs a heating operation or a cooling operation according to a controller command at an outdoor side to supply heat or cold to the indoor air conditioning unit 12 and the indoor water using terminal 13, and the outdoor unit 11 includes a compressor, a four-way valve, an outdoor heat exchanger, a liquid storage tank, an outdoor fan, and the like. When the outdoor heat exchanger works in an evaporation state during heating operation, and when the outdoor heat exchanger works in a condensation state during cooling operation, the outdoor heat exchanger exchanges heat with the air supply of the outdoor fan so as to condense or evaporate the refrigerant flowing in the outdoor heat exchanger, thereby further achieving the purpose of cooling or heating. In cooperation with the indoor air conditioning unit 12, the indoor air conditioning unit includes an indoor heat exchanger and an electronic expansion valve connected in series with the indoor heat exchanger, and further includes an indoor fan to supply cold air or warm air to the air-conditioned room, so as to achieve the effect of raising or lowering the room temperature. The indoor heat exchanger is matched with the working state of the outdoor heat exchanger, when in heating operation, the indoor heat exchanger works in a condensation state, and when in refrigerating operation, the indoor heat exchanger works in an evaporation state. The indoor heat exchanger exchanges heat with the air supplied by the indoor fan to condense or evaporate the refrigerant flowing through the indoor heat exchanger. The flow of the refrigerant entering the indoor heat exchanger can be adjusted by adjusting the opening of the electronic expansion valve matched with the indoor heat exchanger, so that the heat quantity or the cold quantity can be further finely controlled.

A water temperature sensor is also arranged in the whole multi-split system and is configured to detect the real-time water temperature of the indoor water terminal 13; a discharge pressure sensor configured to detect a discharge pressure of the compressor; and an indoor temperature sensor configured to detect an indoor ambient temperature. Besides, a suction pressure sensor for detecting the suction pressure of the compressor, a coil temperature sensor for detecting the temperature of the refrigerant, a suction temperature sensor for detecting the suction temperature of the compressor, a discharge temperature sensor for detecting the discharge temperature of the compressor, an outdoor environment temperature sensor for detecting the outdoor environment temperature, and the like can be selectively arranged in the multi-split system. The sensors are respectively in communication connection with the controller, and transmit acquired data to the controller for controlling the multi-split system.

Unlike the prior art in which a line controller for controlling an indoor air conditioning unit and a line controller for controlling an indoor water terminal are separately provided, in the present embodiment, one control terminal 14 is provided for each air conditioning room, and the control terminal 14 is configured to receive a set indoor temperature. The controller receives the set indoor temperature, samples the indoor environment temperature detected by the indoor temperature sensor in real time, monitors the indoor environment temperature, generates set control target parameters according to the set indoor temperature, and further controls the compressor to operate according to the set control target parameters. Therefore, when the whole multi-split air conditioning system runs, particularly during heating, when the indoor environment temperature is lower than the set indoor environment temperature, the outdoor unit 11 and the indoor water terminal 13 (such as a floor heater) can be automatically started to heat until the indoor environment temperature reaches the set indoor environment temperature. When the air conditioner is used, a user only needs to operate and set the target indoor temperature during heating or cooling operation, the automatic operation of the unit can be realized, the indoor air conditioning unit 12 and the indoor water consumption terminal 13 are simultaneously controlled by the same control terminal 14, the user operation can be effectively simplified, the use habits of the user are met, and the unit cost is remarkably reduced. The control terminal 14 is preferably a wire controller, but may be other electronic devices that can achieve the same function, such as a control panel, a remote controller, or a mobile terminal. The controller may be a single chip microcomputer provided in the outdoor unit 11.

Water temperature and water temperature in indoor water terminals 13 represented by floor radiant heating in heating operationThe indoor environment temperature is related, but the one-to-one correspondence relationship does not exist, and in the invention, the indoor environment temperature is adopted as a control target, so that a protection mechanism is specially designed for preventing the problems of overload operation of a compressor or floor damage and the like caused by overhigh water temperature. The controller is configured to sample the water temperature of the indoor water terminal 13 during heating operation and determine whether the water temperature satisfies a first set compressor shutdown condition, i.e., whether the real-time water temperature is greater than or equal to the upper water temperature threshold. And if the real-time water temperature meets the first set compressor stopping condition, namely the real-time water temperature is greater than or equal to the upper limit threshold of the water temperature, controlling the compressor to stop. The upper limit threshold of the water temperature is obtained by testing an operator with professional technical knowledge under experimental conditions, and the upper limit threshold of the water temperature is different according to different factors such as the capacity of the compressor, the material of a matched pipeline and the like, and the numerical value of the upper limit threshold of the water temperature is not limited. The upper threshold of water temperature can be usually set within the range of 35-65 deg.C, and can be further corrected according to the outdoor environment temperature, for example, the upper threshold T of water temperature can be set₀Satisfy T₀＝T_t+T_aWherein T is_tCan take the value in the numerical range of 35-65 ℃, T_aIs the outdoor ambient temperature. After the water temperature protection is executed, the compressor can be automatically started according to the time or the water temperature reduction amplitude, for example, the compressor is started again after the compressor is stopped for A minutes, and A can take a value in a numerical range from 1 minute to 15 minutes. Or if the temperature of the water is detected and judged to be reduced by B ℃, the compressor is automatically started again, and B can take a value within the numerical range of 3-20 ℃.

Meanwhile, the controller is further configured to sample the indoor ambient temperature of the air-conditioned room during heating operation, and determine whether the indoor ambient temperature of the air-conditioned room satisfies a second set compressor shutdown condition, i.e., whether the real-time indoor ambient temperature is greater than or equal to the set indoor temperature. And if the indoor ambient temperatures of all the air-conditioning rooms meet the second set compressor stop condition, namely the indoor ambient temperatures are greater than or equal to the set indoor temperature, controlling the compressor to stop.

The method for generating the set control target parameter according to the set indoor temperature by the controller is described in detail below, and the controller is further configured to perform the normal heating operationAt least one operating parameter is sampled, and the operating parameter is the exhaust pressure of a compressor or the water temperature. The controller is further configured to acquire first control target parameters H respectively_{zopt_tmp}And a second control target parameter H_{zopt_wmp}And with the first control target parameter H_{zopt_tmp}And a second control target parameter H_{zopt_wmp}The smaller one of them is used as a set control target parameter to control the operation of the compressor. Setting control target parameter to be denoted by H_zoptSetting the control target parameter to H_zoptSatisfy H_zopt＝min(H_{zopt_tmp}，Hz_{opt_wmp}). First control target parameter H_{zopt_tmp}Calculating a second control target parameter H according to the set indoor temperature_{zopt_wmp}And calculating according to the operation parameters. When the operation parameter is the compressor discharge pressure, the first control target parameter H_{zopt_tmp}A second control target parameter H for calculating a first compressor target discharge pressure based on the set indoor temperature_{zopt_wmp}In order to calculate the target discharge pressure of the second compressor based on the operation parameter, the multi-split system controls the operation of the compressor with a smaller one of the target discharge pressures of the first and second compressors as a set control target parameter, and more particularly, the controller controls the frequency of the compressor with the smaller one of the target discharge pressures of the first and second compressors as the set control target parameter. The existing PID algorithm or fuzzy control algorithm can be adopted when controlling the frequency of the compressor, and the algorithm is not the protection key point of the invention and is not described again. When the operation parameter is the water temperature of the indoor water terminal 13, the first control target parameter H_{zopt_tmp}A first set water temperature of the indoor water terminal 13 calculated based on the set indoor temperature, a second control target parameter H_{zopt_wmp}In order to calculate the second set water temperature according to the operation parameters, the multi-split system controls the operation of the compressor by taking the smaller one of the first set water temperature and the second set water temperature as the set control target parameter, that is, the controller controls the frequency of the compressor by taking the smaller one of the first set water temperature and the second set water temperature as the set control target parameter.

More specifically, in one aspect, the controller is configured to calculate a first control target parameter H based on a set indoor temperature_{zopt_tmp}The following steps are executed:

acquiring a plurality of real-time indoor environment temperatures in a set sampling period;

calculating the difference value between each real-time indoor environment temperature and the set indoor temperature;

selecting the maximum value of the difference between the real-time indoor environment temperature and the set indoor temperature, and recording the maximum value as delta T_max；

Calculating a first control target parameter H_{zopt_tmp}，H_{zopt_tmp}＝C+ΔT_maxD; wherein C is a set value; if the operation parameter is the compressor exhaust pressure, C takes a value within a value range of 1.5-2.5; if the operation parameter is the water temperature of the indoor water using terminal 13, the value of C is within the value range of 25-45; d is a coefficient and is within a value range of 0.1-15. C. The value of D is related to the compressor performance. Through the steps, the corresponding first control target parameter H can be calculated according to the set indoor environment temperature selected by the user_{zopt_tmp}First control target parameter H_{zopt_tmp}The difference value between the real-time indoor environment temperature and the set indoor temperature is calculated under the condition that the maximum value of the difference value between the real-time indoor environment temperature and the set indoor temperature is selected, the deviation range in the heating operation process can be accurately represented, namely, the deviation between the set indoor environment temperature and the current operation working condition can be sampled, and the control effect is ensured.

In another aspect, the controller is configured to calculate a second control target parameter H based on the real-time operating parameter_{zopt_wmp}The following steps are executed:

judging a set interval to which the operation parameter belongs;

calling a correction value corresponding to the setting interval to which the operation parameter belongs according to the setting interval to which the operation parameter belongs;

taking the sum of the initial control target parameter and the correction value as a second control target parameter H_{zopt_wmp}(ii) a Wherein the initial control target parameter is a control target base number or a second control target parameter H 'calculated in the last control period'_{zopt_wmp}。

As a preferenceIn the embodiment of (2), five setting sections may be divided. Specifically, the controller is configured to calculate a second control target parameter H based on the real-time operating parameter_{zopt_wmp}The following steps are executed:

judging whether the operation parameters belong to a first set interval or not; if the first set interval is reached, the second control target parameter H_{zopt_wmp}Is the sum of the initial control target parameter and the first correction value G0;

judging whether the operation parameters belong to a second set interval or not; if the second control target parameter belongs to the second setting interval, the second control target parameter H_{zopt_wmp}Is the sum of the initial control target parameter and the second correction value G1;

judging whether the operation parameters belong to a third set interval or not; if the second control target parameter belongs to the third setting interval, the second control target parameter H_{zopt_wmp}Is the sum of the initial control target parameter and the third correction value G2;

judging whether the operation parameters belong to a fourth set interval or not; if the second control target parameter belongs to the fourth setting interval, the second control target parameter H_{zopt_wmp}Is the sum of the initial control target parameter and the fourth correction value G3;

judging whether the operation parameters belong to a fifth set interval or not; if the second control target parameter belongs to the fifth setting interval, the second control target parameter H_{zopt_wmp}Is the sum of the initial control target parameter and the fifth correction value G4.

Wherein the initial control target parameter is a control target base number or a second control target parameter H 'calculated in the last control period'_{zopt_wmp}Upper limit thresholds of the first setting section, the second setting section, the third setting section, the fourth setting section, and the fifth setting section are sequentially decreased, and first correction value G0, second correction value G1, third correction value G2, fourth correction value G3, and fifth correction value G4 are sequentially increased.

More specifically, a preset control target, which may be a set target water temperature or a set compressor target discharge pressure, is written and stored in the controller in advance. The preset control target is obtained by testing by technicians with professional technical knowledge under experimental conditions, and corresponds to a standard target water temperature which is generally comfortable for a user in a heating running state, or a compressor exhaust pressure corresponding to the standard target water temperature (namely, the target compressor exhaust pressure is set). And dividing different set intervals based on a preset control target, further detecting the operation parameters by the controller in the normal heating operation process, judging the set interval which the operation parameters belong to and is related to the preset control target, and further judging the deviation between the current operation parameters and the preset control target.

More specifically, the upper and lower threshold values of the first, second, third, fourth, and fifth setting sections may be generated according to a preset control target. Assuming that OPT represents the preset control target, the upper threshold of the first setting section may be denoted by OPT-E, the upper threshold of the second setting section may be denoted by OPT-F, the upper threshold of the third setting section may be denoted by OPT-G, and the upper threshold of the fourth setting section may be denoted by OPT-H. Similarly, the lower threshold of the second setting section may be represented by OPT-E, the lower threshold of the third setting section may be represented by OPT-F, the lower threshold of the fourth setting section OPT-G, and the lower threshold of the fifth setting section may be represented by OPT-H; wherein E, F, G, H are constants and satisfy the relationship that OPT-E is greater than OPT-F, OPT-F is greater than OPT-G, and OPT-G is greater than OPT-H.

The controller stores a control target base number, and further calls different correction values to correct the control target base number according to the degree of deviation of the operation parameters from the preset control target on the basis of the control target base number, so that the control target gradually approaches to the preset control target. First correction value G0, second correction value G1, third correction value G2, fourth correction value G3, and fifth correction value G4 satisfy a relationship of sequentially increasing. For example, if the degree of deviation of the current operation parameter from the preset control target is small, the sum of the control target base and the first correction value G0 is used as the second control target parameter H on the basis of the control target base_{zopt_wmp}(ii) a If the degree of deviation of the current operation parameter from the preset control target is large, the sum of the control target base and the fourth correction value G3 is used as the third correction value on the basis of the control target baseTwo control target parameters H_{zopt_wmp}。

Preferably, the first correction value G0, the second correction value G1, the third correction value G2, the fourth correction value G3 and the fifth correction value G4 are set to have a smaller magnitude with respect to the control target base, and the second control target parameter H is determined by gradually accumulating_{zopt_wmp}. Continuing the above example, if the degree of deviation of the current operation parameter from the preset control target is small in the initial state, i.e., belongs to the first setting section, the sum of the control target base and the first correction value G0 is used as the second control target parameter H on the basis of the control target base_{zopt_wmp}. Calculating the second control target parameter H of the last control period_{zopt_wmp}Note H'_{zopt_wmp}And keeping monitoring of the operation parameters, and if the operation parameters detected again still belong to the first set interval, calculating a second control target parameter H 'in the previous control period'_{zopt_wmp}Based on the second control target parameter H 'calculated in the previous control period'_{zopt_wmp}The sum of the first correction value G0 is used as the second control target parameter H of the control period_{zopt_wmp}。

Selecting a first control target parameter H_{zopt_tmp}And a second control target parameter H_{zopt_wmp}The smaller one of the air conditioner units is used as a set control target parameter to control the operation of the compressor, so that the unit can meet the heating requirement of a user in a short time, the user only needs to set the indoor environment temperature in the whole process, the air conditioner use habit of the user is met, only one wire controller needs to be arranged in an air conditioner room, and the unit cost can be effectively reduced.

Preferably, if the operation parameter is the compressor discharge pressure, the first correction value G0, the second correction value G1, the third correction value G2, the fourth correction value G3 and the fifth correction value G4 take values within a value range of-0.5 to 0.5. E. F, G, H is selected within the range of-1.5 to 1.5. Preferably, E can take a value within a numerical range of 0-1.5, F can take a value within a numerical range of 0-1.0, G can take a value within a numerical range of-1.0-0, H can take a value within a numerical range of-1.5-0, G0 can take a value within a numerical range of 0-1.5, G1 can take a value within a numerical range of 0-1.0, G2 can take a value within a numerical range of-1.0, G3 can take a value within a numerical range of-1.0-0, and G3 can take a value within a numerical range of-1.5-0. If the operation parameter is the water temperature, the first correction value G0, the second correction value G1, the third correction value G2, the fourth correction value G3 and the fifth correction value G4 take values within a numerical range of-5. E. F, G, H is selected within the range of-15 to 15. Preferably, E can take a value within a numerical range of 0-15, F can take a value within a numerical range of 0-10, G can take a value within a numerical range of-10-0, H can take a value within a numerical range of-15-0, G0 can take a value within a numerical range of 0-1.5, G1 can take a value within a numerical range of 0-1.0, G2 can take a value within a numerical range of-1.0, G3 can take a value within a numerical range of-1.0-0, and G3 can take a value within a numerical range of-1.5-0.

The above calculation method is represented by formula and list as follows:

if the real-time operating parameter is less than or equal to OPT-E, or if the real-time operating parameter is less than or equal to OPT-E<OPT-E, then the second control target parameter H_{zopt_wmp}Satisfy H_{zopt_wmp}＝H’_{zopt_wmp}+G0；

If OPT-E is less than or equal to real-time operating parameter is less than or equal to OPT-F, or if OPT-E<Real time operational parameters<OPT-F, then the second control target parameter H_{zopt_wmp}Satisfy H_{zopt_wmp}＝H’_{zopt_wmp}+G1；

If OPT-F is less than or equal to real-time operating parameter less than or equal to OPT-G, or if OPT-F<Real time operational parameters<OPT-G, then the second control target parameter H_{zopt_wmp}Satisfy H_{zopt_wmp}＝H’_{zopt_wmp}+G2；

If OPT-G is less than or equal to real-time operating parameter less than or equal to OPT-H, or if OPT-G<Real time operational parameters<OPT-H, then the second control target parameter H_{zopt_wmp}Satisfy H_{zopt_wmp}＝H’_{zopt_wmp}+G3；

If OPT-H is less than or equal to the real-time operating parameter, or if OPT-H<Real-time operating parameters, then second control target parameter H_{zopt_wmp}Satisfy H_{zopt_wmp}＝H’_{zopt_wmp}+G4。

Wherein H'_{zopt_wmp}A second control target parameter calculated for the control target base or the previous control cycle.

The values of all parameters meet the requirements of table 1

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions.